JP7382802B2 - Test fuel preparation method and device - Google Patents

Description

The present invention relates to a test fuel preparation method and apparatus, and more particularly, a test fuel preparation method for preparing a test fuel by mixing multiple types of liquid standard fuels with different properties in a ratio corresponding to target properties. and regarding equipment.

Test fuels such as standard fuel and inspection fuel are used in tests to measure the properties of liquid fuel. For example, JIS K2280 "Determination of octane number, cetane number and cetane index of petroleum products" specifies methods for measuring the octane number of gasoline and the cetane number of light oil. The measurement result is determined by comparing the knock strength (anti-knock property) of the fuel to be measured with the knock strength of a standard fuel with a known octane number through a test using a CFR (Cooperative Fuel Research) engine adjusted under the following conditions. It is now possible to obtain it.

The official standard fuel (test fuel) used in this test is, when the octane number is 100 or less, the official standard fuel of isooctane, which has an extremely high anti-knock property, is used as an indicator of the octane number of 100, and heptane (n-heptane), which has an extremely low anti-knock property. It is prepared by mixing the regular standard fuel with the 0 octane number as an indicator of 0 octane number in a volume ratio corresponding to the required octane number, and the octane number is expressed as the volume fraction (%) of isooctane in the mixed fuel. expressed.

As a method and apparatus for preparing such a test fuel, for example, Patent Document 1 discloses a method and apparatus for mixing multiple types of liquid fuel reagents (hereinafter referred to as liquid reagents) to prepare a test mixture having target property values and volume. In order to prepare a liquid reagent, a liquid reagent storage tank, an air supply pipe that supplies air to the storage tank, a pressure detector and a valve attached to the air supply pipe, and a pressure sensor and a valve that respond to the pressurized air pressure inside the storage tank are used. A transport pipe that transports liquid reagents to a mixing container, a flow meter and valve installed in the transport pipe, a flow measurement circuit that connects to multiple flow meters to calculate the flow rate and cumulative flow rate of each liquid reagent, and a flow meter and valve installed in the transport pipe. A device is disclosed that includes a liquid level detector that detects when the liquid level of the mixed liquid in the container reaches the vicinity of the container mouth, and a stirrer that stirs the mixed liquid in the mixing container.

Registered utility model No. 2544402

However, in the conventional test fuel mixing method and apparatus described above, the cumulative flow rate of each liquid reagent (standard fuel for each type) transported and injected into the mixing container corresponds to the preset mixing ratio. When the air pressure valve and the liquid transport control valve corresponding to that liquid reagent are reached, the valve is closed. , the mixture ratio of the mixed fuel was to be calculated based on the ratio of the cumulative flow rates of multiple liquid reagents measured by multiple flowmeters.

For this reason, high measurement accuracy is required for multiple flow meters that measure the flow rates of multiple liquid reagents, which not only increases the cost of test fuel blending equipment, but also causes variations in measurement accuracy between multiple flow meters. It was also difficult to detect and adjust for deterioration in measurement accuracy over time.

In addition, we are trying to perform a blending operation that suppresses errors, such as fuel blending in accordance with the blending procedure using volume ratios described in the Japanese Industrial Standards (JIS K 2280), the Japan Petroleum Institute Standards (JPI-5R-5), the ASTM standards, etc. Then, the burette in a normal blending device is required to have a scale error of up to ±0.1%, but in that case, when injecting each type of standard fuel into the blending container, the standard fuel is placed on the tube wall of the buret. This required a time-consuming blending operation to ensure that no residue remained, and the blending operation was not easy.

Furthermore, in order to obtain the same accuracy as the formulation according to the above-mentioned Petroleum Institute standards using conventional test fuel preparation methods and equipment, multiple Because flowmeters require high measurement accuracy, it is difficult to increase the injection speed of liquid reagents into the mixing container, and it is necessary to balance the target test fuel properties and mixing capacity with sufficient mixing processing speed. It was difficult to do so.

Furthermore, in the conventional test fuel preparation method and apparatus described above, multiple sets of air supply piping, fuel charge piping, transport piping for each reagent fuel, etc. exist and intersect, which makes the equipment configuration complicated and the equipment This led to an increase in size, which also led to higher costs.

The present invention solves the conventional unresolved problems as described above, and facilitates the blending operation and achieves both the target properties and mixing capacity of the test fuel and a sufficient blending processing speed. It is an object of the present invention to realize a test fuel blending method that allows the test fuel to be mixed, and to provide a low-cost test fuel blending device that implements the method.

In order to solve the above-mentioned problems, the present invention provides a test fuel preparation method in which a test fuel mixture is prepared by mixing multiple types of liquid standard fuels with different properties at a predetermined ratio corresponding to the target properties. an injection step of injecting the plurality of types of standard fuel into a mixing container so as to sequentially collect each type; and measuring the net weight of the plurality of types of standard fuel stored in the mixing container for each type. and a net weight measuring step for each type to be output, and a first net weight target value for storing a specific type of standard fuel among the plurality of fuels in the blending container. outputting a first sampling weight target value during a first sampling period in which standard fuel of the type is injected; The injection means causes the specific type of standard fuel to be injected into the blending container until the net weight of the specific type of standard fuel reaches the target value of the first net weight. a first injection amount adjustment step of stopping the injection of the specific type of standard fuel into the blending container by the injection means when the target value is reached; a second sampling weight target value for outputting a second net weight target value for accommodation in a formulation vessel during a second sampling period in which said other type of standard fuel is injected into said formulation vessel; during the output step and the second sampling period, the other type of standard fuel is fed by the injection means until the net weight of the other type of standard fuel reaches the second net weight target value. While injecting the other kind of standard fuel into the blending container, when the net weight of the other kind of standard fuel reaches the second net weight target value, the other kind of standard fuel is injected into the blending container by the injection means. The method is characterized by including a second injection amount adjustment step of stopping fuel injection.

With this configuration, the test fuel blending method of the present invention does not require the use of multiple flowmeters to inject multiple types of standard fuel into the blending container at a predetermined ratio, and the multiple types of fuel after measurement are There is no longer a need for time-consuming mixing operations to ensure that no residue remains in the injection pipe, and since the mass is mixed with a predetermined precision, it is possible to achieve sufficient mixing with the target test fuel properties and mixing volume. This is a method that can achieve both processing speed and processing speed.

In the test fuel blending method of the present invention, in the net weight measuring step for each type, the net weight of the plurality of types of standard fuels is tared for each type using an electronic scale having a zero reset function that can erase the tare. It is possible to have a configuration in which the measurement is performed simultaneously.

Further, in the net weight measuring step for each type, the net weight of the plurality of types of standard fuels stored in the blending container is measured and displayed for each type, and in the first sampled weight target value output step , displaying and outputting the first target value of the net weight during the first sampling period, and outputting the second net weight during the second sampling period in the second sampling weight target value output step. It is also possible to have a configuration in which the target value of is displayed and output.

The test fuel blending method of the present invention may be configured such that the test mixed fuel is a fuel for an anti-knock property measurement test of a spark ignition engine, and the plurality of types of standard fuels having different properties include: It may include isooctane standard fuel and n-heptane standard fuel.

Alternatively, in order to solve the above problems, the present invention provides a test fuel in which a mixed fuel for testing is prepared by mixing multiple types of liquid standard fuels with different properties at a predetermined ratio corresponding to target properties. A blending device, comprising: a blending container containing the plurality of types of standard fuel; an injection means for injecting the plurality of types of standard fuel into the blending container so as to sequentially collect each type; and a blending device housed in the blending container. net weight measuring means for measuring and outputting the net weight of the plurality of types of standard fuels for each type; and a first means for storing a specific type of standard fuel among the plurality of types in the mixing container. a first sampling weight target, wherein a net weight target value is set and the first net weight target value is output during a first sampling period in which the particular type of standard fuel is injected into the blending vessel; value output means; during the first sampling period, the particular type of standard fuel is supplied by the injection means until the net weight of the particular type of standard fuel reaches the first net weight target value; is injected into the blending container by the injection means when the net weight of the specific type of standard fuel reaches the first net weight target value. A first injection amount adjusting means for stopping injection of the standard fuel, and a second net weight target value for accommodating another type of standard fuel among the plurality of types in the mixing container are set, a second sampled weight target value output means for outputting a target value of the second net weight during a second sample period in which the other type of standard fuel is injected into the blending container; during which the injection means injects the other type of standard fuel into the blending container until the net weight of the other type of standard fuel reaches the second net weight target value; a second injection for stopping the injection of the other type of standard fuel into the blending container by the injection means when the net weight of the other type of standard fuel reaches the second net weight target value; Amount adjusting means.

With this configuration, the test fuel blending device of the present invention can implement the test fuel blending method of the present invention, and can achieve both the target test fuel properties and mixing capacity and a sufficient blending processing speed. This is a low-cost test fuel blending device.

In the test fuel blending device of the present invention, the type-by-type net weight measuring means measures and displays the net weight of the plurality of types of standard fuels stored in the blending container for each type. Alternatively, the net weight measuring means for each type may be an electronic scale having a zero reset function capable of erasing tare.

In the test fuel blending device of the present invention, the first injection amount adjusting means and the second injection amount adjusting means may each include an electrically driven valve having a needle valve body.

The present invention realizes a test fuel blending method that facilitates the blending operation and achieves both the target test fuel properties and mixing capacity with a sufficient blending processing speed. It is possible to provide a low-cost test fuel blending device that performs the following steps.

1 is a front view showing a schematic configuration of a test fuel blending device according to an embodiment of the present invention. 1 is a flowchart showing a general procedure in a test fuel blending method according to an embodiment of the present invention. FIG. 3 is a schematic configuration diagram of a test fuel blending device according to another embodiment of the present invention.

(One embodiment)
FIGS. 1 and 2 illustrate a test fuel blending device and a test fuel blending method performed using the test fuel blending device according to an embodiment of the present invention.

A test fuel blending apparatus and method according to an embodiment of the present invention will be described below.

First, the configuration will be explained.

The test fuel blending device 10 according to the present embodiment mixes multiple types of liquid standard fuels RF1 and RF2 with different properties at a predetermined ratio corresponding to a target property value (for example, octane number), and mixes the test fuel ( mixed fuel).

The test fuel referred to here is a fuel for testing the anti-knock properties of spark ignition engines, and includes multiple types of standard fuels with known properties and different from each other, such as isooctane standard fuel RF1 and n-heptane (normal heptane) standard fuel. It is a mixture of fuel RF2 and fuel RF2.

This test fuel blending device 10 includes a blending container 11 in which a plurality of types of standard fuels RF1 and RF2 can be sampled and stored, respectively, in a main body case 10M, and a plurality of types of standard fuels RF1 and RF2 in the blending container 11. It is equipped with an injection means 12 for injecting RF2 so as to collect it sequentially for each type.

The mixing container 11 is a metering container that has an opening at the top, a stepped peripheral wall with a larger diameter on the lower side, and a substantially flat bottom wall (each without a reference numeral). The mixed fuel containing the standard fuel RF2 can be stored in a predetermined amount, for example, 500 ml (milliliter; hereinafter, cm ³ is used) or more.

The injection means 12 includes lower tanks T11, T12, pumps P11, P12, a pump drive circuit (not shown), pumping pipes L11, L12, upper tanks T21, T22, injection valves V21, V22, injection pipes L21, L22, and a valve operation knob. It is composed of Kv1 and Kv2.

The lower tanks T11 and T12 are portable fuel cans for each fuel type that accommodate and store a predetermined amount, for example, 18 liters of standard fuel RF1 and RF2, respectively. These lower tanks T11 and T12 can be replaced by opening the left and right opening and closing doors 31 and 32 on the lower side of the main body case 10M (the opening and closing doors 32 are shown in an open state in FIG. 1).

Moreover, the mixing container 11 can be taken in and out by opening the left and right transparent doors 33 and 34 in the middle of the main body case 10M. In FIG. 1, the blending container 11 is arranged at the center of the left and right sides, but it may be arranged closer to one side and the stirring device is arranged on the other side.

The pumps P11 and P12 are driven by a pump drive circuit (not shown) and are constructed of pumps, for example, gear pumps, which can pump the standard fuels RF1 and RF2 from the corresponding lower tanks T11 and T12 to the upper tanks T21 and T22, respectively. There is.

The upper tanks T21 and T22 are, for example, substantially sealed tanks with a slightly larger volume than the lower tanks T11 and T12, and atmospheric pressure is introduced inside by installing so-called breather valves (air vent valves) Va1 and Va2 at the top. It is now possible.

The injection valves V21 and V22 are manually operated flow rate regulating valves whose opening and closing operations are manually controlled by corresponding valve operation knobs Kv1 and Kv2. It includes a needle valve body having tapered surfaces that engage and disengage.

The test fuel blending device 10 further includes an electronic scale 13 having a zero reset function that can erase a tare weight (also referred to as "tare subtraction"), and a plurality of flat panels 14A and 14B for displaying a target sample weight value. ing. The plurality of flat panels 14A and 14B may be configured with a single display whose display can be switched.

The electronic scale 13 has a built-in microcomputer so that it can perform operations such as so-called zero point adjustment, sensitivity adjustment, and tare erasure.

Specifically, the electronic scale 13 measures the weight to be loaded using a load sensor such as a well-known load cell or electromagnetic balance scale, and performs filter processing to remove noise components on the sensor output. It is configured to be able to output a weighing signal with a resolution of . Further, the electronic scale 13 is of a wide range and has a weighing range larger than the sum of the tare weight of the mixing container 11 and the net weight of the sampled amount of the mixed fuel containing multiple types of standard fuels RF1 and RF2. As the electronic scale 13, for example, ELB600 manufactured by Shimadzu Corporation, which can have a weighing range of 600 g and a minimum display of 0.05 g, can be suitably used.

In this embodiment, the densities of multiple types of standard fuels RF1 and RF2 are measured in advance according to the procedure for "mass mixing of standard fuels" specified in JIS K2280-2:2018 (6.3), and then the densities of multiple types of standard fuels RF1 and RF2 are measured in advance. Calculate the mass of each of the necessary mixture components based on the density of It can be prepared.

Specifically, the electronic scale 13 has a built-in weighing control circuit that has a zero reset function or a taring function that erases the tare weight by setting the load at the time of the operation to the tare weight by pressing the tare erase request switch 13a. When sampling and injecting multiple types of standard fuels RF1 and RF2 into the mixing container 11 by type using the injection means 12, by manually performing tare erasure, multiple types of standard fuels RF1 and RF2 can be extracted by manual tare deletion. This is a type-by-type net weight measuring means that can measure the net weight of the type being collected for each type of RF2.

The flat panels 14A and 14B are display panels (collected weight target value output means) that display the net weight of each type of the plurality of standard fuels RF1 and RF2. It may be configured as a single display panel that simply displays the net weight in two rows above and below or side by side on the left and right, or it may be configured as a display panel that can switch the display approximately in synchronization with the erasure of the tare weight in the electronic scale 13. It may be.

The test fuel blending device 10 of this embodiment further includes a setting device 15 for setting fuel blending conditions.

This setting device 15 determines the blended amount (mixed liquid amount) of test fuel to be blended in the blending container 11, target property values such as research octane number (RON), and multiple types of standard fuels RF1 and RF2. An operation input device 15a capable of setting and inputting the types (two or more types may be used), the order of sampling (injection into the compounding container 11) for each type, execution conditions for the above-mentioned tare deletion, etc., and calculations in the computer configuration. It has a processing section 15b.

The operation input device 15a is composed of a keyboard or a touch panel type operation input device, and the arithmetic processing unit 15b has a built-in small storage device in addition to a CPU, ROM, RAM, etc. By running a predetermined control program, various set values and sampling procedures can be memorized, and when the blended amount of test fuel and the octane number after blending are set, it can be calculated from those set input values. The target value of the sampled weight (net weight corresponding to the sampled amount) for each type of multiple types of standard fuels RF1 and RF2 is calculated. The calculation results are stored in a storage device in a predetermined format.

For example, if the blended amount Q is 500 [cm ³ ] and the target octane number after blending is 90 (RON=90), the target collection weight q1 [g] of the standard fuel RF1 of isooctane and the standard fuel of n-heptane The target collection weight q2 [g] of fuel RF2 is, assuming that the density ρ1 of isooctane is 0.691 g/cm ³ (at 20°C) and the density ρ2 of n-heptane is 0.684 g/cm ³ (at 20°C).
q1=Q×(RON/100)×ρ1=310.95[g] ...Formula (1)
q2=Q×(1-RON/100)×ρ2=34.2[g] ...Formula (2)
RON/100=q1/(q1+q2)...Formula (3)
The extraction amounts q1 and q2 can be calculated in accordance with the input of the set blending amount Q and the set value of the octane number RON.

At the time of compounding, the valve operation knob Kv1 controls the opening and closing of the injection valves V21 and V22 for each type of standard fuel RF1 and RF2 according to the various parameters set by the setting device 15 and the weighing signal from the electronic scale 13. , Kv2, it is possible to manually control the amount of the plurality of standard fuels RF1 and RF2 collected into the mixing container 11.

In addition, according to the change in the weight measurement value by the electronic scale 13, the injection valve V21 on the standard fuel RF1 side of isooctane is gradually opened to collect the standard fuel RF1 into the mixing container 11, and the weight measurement value is the standard fuel. When the target collection weight q1 of RF1 is approached, the injection valve V21 is gradually closed, and the opening degree of the injection valve V21 is adjusted by adjusting the valve operation knob so that the injection valve V21 becomes fully closed when the target collection weight q1 is reached. It can be controlled by Kv1.

Similarly, in response to changes in the weight measured by the electronic scale 13, the valve V22 on the standard fuel RF2 side of n-heptane is gradually opened to collect the standard fuel RF2 into the mixing container 11, and the weight measured value is When the target sampling weight q2 of standard fuel RF2 is approached, the injection valve V22 is gradually closed, and the opening degree of the injection valve V22 is adjusted so that the injection valve V22 becomes fully closed when the target sampling weight q2 is reached. It can be controlled with the operation knob Kv2.

Furthermore, when starting compounding, it is possible to check the weight measurement value digitally displayed on the electronic scale 13 and execute a tare erasure process that resets the measured value for the weight of the compounding container 11 to zero. When the collection of the standard fuel RF1, which is collected in advance among the standard fuels RF1 and RF2, is completed, the electronic scale 13 can be caused to perform the tare deletion described above by pressing the tare deletion request switch 13a. can. However, if the built-in function of the electronic scale 13 allows automatic taring after a predetermined period of time or at predetermined time intervals, the built-in function may be substituted for the tare deletion request operation and the manual request operation may be omitted.

The flat panel 14A corresponding to a specific kind of standard fuel RF1 is arranged on the lower tank T11 and upper tank T21 side that store the standard fuel RF1 with respect to the digital display panel 13b of the electronic scale 13, and The flat panel 14B corresponding to the standard fuel RF2 is arranged on the side of the lower tank T12 and the upper tank T22 that store another kind of standard fuel RF2 with respect to the digital display panel 13b of the electronic scale 13, and the flat panel 14B corresponds to the injection valve V21, When operating one of the valve operation knobs Kv1 and Kv2 of V22, a corresponding flat panel 14A or 14B is located on one side thereof.

Therefore, when the target value q1 (or q2) of the net weight for storing a specific type of standard fuel RF1 (or RF2) measured by the electronic scale 13 in the blending container 11 has been set in advance, the blending During the sampling period when a certain type of standard fuel RF1 (or RF2) is injected into the container 11, the target value q1 (or q2) of the net weight can be displayed by one of the flat panels 14A (or 14B). .

That is, the flat panel 14A controls the mixing container 11 in a state where the target collection weight q1 (target value of the first net weight) for collecting a specific type of standard fuel RF1 into the mixing container 11 is set in advance. A first sampled weight target value output means is configured to display a target sampled weight q1 during a first sampled period in which a specific type of standard fuel RF1 is injected to be sampled. In addition, the flat panel 14B is configured such that the target collection weight q2 (target value of the second net weight) for collecting another type of standard fuel RF2 among the plurality of fuels into the mixing container 11 is set in advance. During a second sampling period in which another type of standard fuel RF2 is injected into the blending container 11 to be sampled, a second sampled weight target value output means is configured to display the target sampled weight q2.

The display of the net weight of the plurality of types of standard fuels RF1 and RF2 by the flat panels 14A and 14B here is a fixed display, and the flat panels 14A and 14B may be a display device, but the flat panels 14A and 14B may be a sheet or panel on which target values are written. It is possible to replace the

The upper tanks T21 and T22 are each equipped with level gauges G1 and G2 that can visually measure the height of the internal liquid level using graduation lines, and replenishment alarm level detectors D1 and D2. When the minimum remaining amount that allows two batches of preparation is reached, a warning can be issued that it is necessary to pump (replenish) the standard fuels RF1 and RF2 from the lower tanks T11 and T12.

When replenishing fuel, a pump drive circuit (not shown) is operated to selectively operate the pumps P11 and P12, and multiple types of standard fuels RF1, Using the collected amount of RF2 as a unit of pumped amount, for each predetermined number of blends, pump operation control is executed to pump up a plurality of types of standard fuels RF1 and RF2 corresponding to the collected amount for that number of times into the upper tanks T21 and T22. I can do it.

Furthermore, during the aforementioned first sampling period, the injection means 12 is configured to inject the specific type of standard fuel RF1 with the valve operating knob Kv1 until the net weight of the specific type of standard fuel RF1 reaches the first net weight target value q1. When the net weight q1 of the specific kind of standard fuel RF1 reaches the first net weight target value q1, the specific kind of standard fuel RF1 is injected into the blending container 11. It constitutes a first injection amount adjusting means capable of stopping the injection of the fuel RF1, and during the aforementioned second sampling period, the net weight of another kind of standard fuel RF2 is adjusted to a second level by the valve operating knob Kv2. The other kind of standard fuel RF2 is injected into the mixing container 11 until the net weight of the other kind of standard fuel RF2 reaches the second target value q2 of the net weight. When doing so, it constitutes a second injection amount adjusting means that can stop the injection of another type of standard fuel RF2 into the mixing container 11.

The test fuel blending device 10 of the present embodiment configured as described above measures the net weight of the plurality of types of standard fuels RF1 and RF2 housed in the blending container 11 for each type using the electronic scale 13. The value (weighed value) can be output.

Then, the electronic scale 13, which is a net weight measuring means for each type, measures and displays the net weights q1 and q2 of the plurality of types of standard fuels RF1 and RF2 stored in the blending container 11 for each type, and , the flat panels 14A and 14B, which are second sampling weight target value output means, display the first net weight target value q1 during the first sampling period, and display the second net weight target value q1 during the second sampling period. The target value q2 of net weight is displayed.

As mentioned above, since the injection means 12 constituting the first injection amount adjustment means and the second injection amount adjustment means each have a needle valve body (not shown), the amount of sampled standard fuels RF1 and RF2 can be adjusted slightly. Adjustment is possible.

In this embodiment, since it was decided to prepare a test fuel with a research octane number of 100 or less, the standard fuel RF1 of isooctane and the standard fuel RF2 of n-heptane were mixed. When preparing a fuel for testing, a mixture of isooctane and tetraethyl lead or toluene (toluene-based secondary standard fuel) can be used.

Furthermore, the present invention can also be applied to the preparation of fuels for cetane number and other tests, in which not only two types but many types (three or more) of standard fuels with known property values are mixed to obtain the desired property value. It can also be applied when preparing fuel for testing.

Next, an embodiment of the test fuel blending method according to the present invention will be described.

FIG. 2 shows a schematic procedure of an embodiment of a test fuel blending method executed by the test fuel blending device 10 described above.

As shown in the figure, first, in order to calculate the sampling amounts of the standard fuels RF1 and RF2, once the blended amount of the mixed fuel containing these is determined, the blended amount Q [ml] is input into the setting device 15. Once the octane number to be blended is determined, the octane number (RON) is input (step S11).

Then, using the setting device 15, the target value of the net weight corresponding to the sample amount of each standard fuel ("sample" in the figure) is set as the target value in response to the set value input of the blended amount Q [ml] and RON [%]. The collected weights q1 and q2 are calculated using, for example, the above-mentioned equations (1) and (2) (step S12).

Note that, prior to the calculation, the densities ρ1 and ρ2 of the standard fuels RF1 and RF2 described above must be measured in advance or their respective measured values must be obtained. In addition, at the time of starting compounding or placing the compounding container 11 on the electronic scale 13, a process is executed to check the weighing signal of the electronic scale 13 and reset the measured value of the weight of the compounding container 11 to zero, It is necessary to keep the tare weight erased.

Further, a target collection weight q1 [g], which is a target value of the net weight corresponding to the collection amount of the standard fuel RF1 of isooctane, is displayed on the flat panel 14A (step S13).

Next, in response to changes in the weighing signal (weight measurement value) of the electronic scale 13 from which the tare has been erased, the injection valve V21 on the isooctane standard fuel RF1 side is gradually opened to collect the standard fuel RF1 into the mixing container 11. go. Also, during this sampling period, the target sampling weight q1 of the standard fuel RF1 is displayed on the flat panel display 14A.

Then, the predetermined sampling flow rate is maintained until the weight measurement value of the electronic scale 13 reaches the preliminary target sampling weight q1' which is smaller than the final target sampling weight q1 (if NO in step S15), and the weight measurement value is used as the preliminary sampling weight. When the target sampling weight q1' is reached (YES in step S15), sampling amount limiting control is executed to gradually reduce the opening degree of the injection valve V21 until the weight measurement value reaches the final target sampling weight q1. (If NO in steps S16 and S17).

The preliminary target sampling weight q1' here is a value that is smaller than the final target sampling weight q1 but close to the target sampling weight q1, and when the weight measurement value reaches this preliminary target sampling weight q1', the upper tank It is desirable that the flow rate of the fuel flowing down from T21 through the injection valve V21 be gradually (even in stages) restricted by the valve operation knob Kv1 of the injection valve V21, and careful operation of the injection valve V21 is now required. This is the collected weight that is the trigger for notifying the user. Therefore, by outputting a warning sound and displaying a warning image on the screen to notify the operator that the preliminary target collection weight q1' has been reached, the operator who manually operates the valve operation knob Kv1 can The weight measurement value of the standard fuel RF1 of isooctane used for production can be made to converge to the target sampling weight q1 without overrunning the final target sampling weight q1.

When the weight measurement value of the electronic scale 13 reaches the target collection weight q1 (YES in step S17), the injection valve V21, which is the first needle valve, is fully closed (step S18).

Next, after erasing the tare by zero-setting the electronic scale 13 using the mixing container 11 in which the octane standard fuel was collected as a tare (step S19), the target value q2 of the net weight corresponding to the amount of the n-heptane standard fuel RF2 collected is determined. [g] is displayed as the target sampling weight on the flat panel 14B (step S20).

Next, in response to changes in the weight measurement value of the electronic scale 13 after the tare has been erased, the injection valve V22 on the n-heptane standard fuel RF2 side is gradually opened to collect the standard fuel RF2 into the mixing container 11. Also, during this sampling period, the target sampling weight q2 of the standard fuel RF2 is displayed on the flat panel 14B (step S21).

Then, the predetermined sampling flow rate is maintained until the weight measurement value of the electronic scale 13 reaches the preliminary target sampling weight q2' which is smaller than the final target sampling weight q2 (if NO in step S22), and the weight measurement value is used as the preliminary sampling weight. When the target sampling weight q2' is reached (YES in step S22), sampling amount restriction control is executed to gradually reduce the opening degree of the injection valve V22 until the weight measurement value reaches the final target sampling weight q2. (If NO in steps S23 and S24).

Here again, the preliminary target sampling weight q2' is smaller than the final target sampling weight q2 but close to the target sampling weight q2, and when the weight measurement value reaches this preliminary target sampling weight q2', the upper tank It is desirable to gradually (may be in stages) restrict the flow rate of fuel flowing down from T22 through the injection valve V22 by the valve operation knob Kv2 of the injection valve V22, and careful operation of the injection valve V22 is now required. This is the collected weight that is the trigger for notifying the user. Therefore, by outputting a warning sound and displaying a warning image on the screen to notify the operator that the preliminary target collection weight q2' has been reached, the operator who manually operates the valve operation knob Kv2 can The weight measurement value of the standard fuel RF2 of n-heptane used for production can be made to converge to the target sampling weight q2 without overrunning the final target sampling weight q2.

When the weight measurement value of the electronic scale 13 reaches the target sampling weight q2 (YES in step S24), the injection valve V22, which is the second needle valve, is fully closed (step S25).

In this embodiment, immediately after the first tare erasure is performed on the electronic scale 13, the injection valve V21 is gradually opened to gradually increase the sampling flow rate of the standard fuel RF1, and then the electronic scale 13 performs weight measurement. Until the value approaches the target sampling weight q1, the injection valve V21 is opened sufficiently to ensure the sampling flow rate of the correct standard fuel RF1, and when the weight measurement value of the electronic scale 13 approaches the target sampling weight q1, the needle valve By gradually closing the injection valve V21, the standard fuel RF1 of the target sampling weight q1 is accurately sampled.

Similarly, immediately after taring the blending container 11 in which the standard fuel RF1 was sampled, the injection valve V22 is gradually opened to gradually increase the sampling flow rate of the standard fuel RF2, and then the weight measurement value of the electronic scale 13 reaches the target value. Until the sampling weight q2 approaches, the injection valve V22 is sufficiently opened to ensure the sampling flow rate of the correct standard fuel RF2, and when the weight measurement value of the electronic scale 13 approaches the target sampling weight q2, the injection valve V22 is opened by the needle valve. By gradually closing the valve V22, the standard fuel RF2 of the target sampling weight q2 is accurately sampled.

Then, the blending container 11 after collecting both standard fuels RF1 and RF2 is taken out from the electronic scale 13, and mixed by stirring using a stirring device.

The mixing container 11 may be compatible with a stirring device such as a magnetic stirrer for stirring.

In this way, in this embodiment, a mixed fuel for testing is prepared by mixing multiple types of liquid standard fuels RF1 and RF2 with different properties at a predetermined ratio (q1:q2) corresponding to the target properties (RON). When carrying out a test fuel mixing method for preparing a test fuel, a plurality of types of standard fuels RF1 and RF2 are sequentially injected into the mixing container 11 for each type (injection step). The net weight of standard fuels RF1 and RF2 is measured and output for each type (net weight measurement step for each type).

Further, the target value of the first net weight q1 [g] for storing a specific type of standard fuel RF1 among the plurality in the blending container 11 is determined by injecting the specific kind of standard fuel RF1 into the blending container 11. (first sampling weight target value output step), during the first sampling period, the net weight of the specific kind of standard fuel RF1 is set to the first net weight target value. The injection means 12 injects the specific type of standard fuel RF1 into the formulation container 11 until the net weight of the specific type of standard fuel RF1 reaches the first net weight target value q1. Then, the injection of the specific type of standard fuel RF1 into the mixing container 11 by the injection means 12 is stopped (first injection amount adjustment step).

Furthermore, the second target value q2 of the net weight for storing another kind of standard fuel RF2 among the plurality in the blending container 11 is set to 2 (second sampling weight target value output step), and during the second sampling period, the net weight of another kind of standard fuel RF2 is equal to the second net weight q2 [g]. The other kind of standard fuel RF2 is injected into the blending container 11 by the injection means 12 until the target value is reached, while the net weight of the other kind of standard fuel RF2 reaches the second target value q2 of the net weight. Then, the injection of the other type of standard fuel RF2 into the mixing container 11 by the injection means 12 is stopped (second injection amount adjustment step).

As described above, in this embodiment, the test fuel blending apparatus 10 having the above configuration can execute the test fuel blending method of the embodiment including a plurality of work steps.

Next, the effect will be explained.

In this embodiment, by performing mass mixing with a predetermined accuracy, it is not necessary to use multiple flowmeters to inject multiple types of standard fuels RF1 and RF2 into the mixing container 11 at a predetermined ratio, and the A time-consuming mixing operation to prevent a plurality of types of fuel from remaining in the injection pipe into the mixing container 11 is no longer necessary. Therefore, we have developed a low-cost blending device and low-work operation that can facilitate the blending operation of test fuels and achieve both the target octane number (property value) and mixing capacity of test fuels and sufficient blending processing speed. This is a method of adjusting costs. In particular, in this embodiment, only the net weight can be calculated after absorbing variations in the mixing containers 11, which is useful for improving accuracy and simplifying weight calculation.

Further, the mixing ratio of the plurality of types of standard fuels RF1 and RF2 is not calculated in a state in which errors in successive measurement values of a plurality of flowmeters are accumulated, and the blending accuracy is also improved.

Furthermore, since there is no need to install multiple high-precision flowmeters, it is possible to reduce the cost of test fuel blending equipment, and detect variations in measurement accuracy between multiple flowmeters and time-based deterioration of each measurement accuracy. Since there is no need for fine adjustments, maintenance of the device is also easy.

In addition, since the opening degrees of the injection valves V21 and V22 having needle valve bodies are manually controlled based on the measurement output (weight measurement value) of the electronic scale 13, the weight measurement value is particularly important for the target of the standard fuel RF1 being measured. When the sampling weight approaches the sampling weight q1 and when the target sampling weight q2 of the standard fuel RF2 being measured is approached, the sampling amount restriction (flow rate restriction) is executed by gradually closing the injection valves V21 and V22. Adjustments can be made, and blending operations can be performed with less error.

In this embodiment, during manual work, information useful for accurate injection operation (opening/closing amount and opening/closing timing of injection valves V21, V22) can be outputted by the flat panel display 14 or setting device 15 with respect to target values.

Moreover, in this embodiment, since the injection valves V21 and V22 having needle valve bodies are used, fine adjustment of the injection amount is facilitated, and improvement in the mixing ratio accuracy can be achieved. In particular, when mixing the standard fuels RF1 and RF2, if an overrun condition occurs in which an amount exceeding the target value is injected, the mixture must be adjusted again, resulting in an increase in man-hours and waste. However, in this embodiment, since the injection valves V21 and V22 having needle valve bodies can be finely adjusted, such a problem is solved, which is beneficial in terms of labor saving and resource conservation.

During automatic operation, based on the weight measurement value of the electronic scale 13, the sampling weight of the standard fuel RF1 being measured approaches the target sampling weight q1, and the sampling weight of the standard fuel RF2 being measured approaches the target sampling weight q2. Since the injection valves V21 and V22 can be kept at a large opening until they approach each other, the injection speed into the mixing container 11 can be increased, and the target test fuel properties and mixing capacity can be matched with a sufficient mixing processing speed. It is easily possible to achieve both. In this working state, the flat panel display 14 or the setting device 15 informs the operator (equipment operator) of the operating status of the mixing operation, and provides an overview of the normal/abnormal operation of the equipment and the remaining mixing amount (remaining time). Information useful for understanding can be outputted by the flat panel display 14 and setting device 15.

Moreover, in the test fuel blending device 10 of the present embodiment, there are multiple sets of air supply piping for valve control, fuel charge piping, transport piping for each reagent fuel, etc., and they do not intersect with each other. This also solves the problem of complicating the device configuration and increasing the size of the device.

In the present embodiment, the injection means 12 includes manually operated injection valves V21 and V22 and pump pumps P11 and P12 that operate in response to a manual replenishment command, so that fine adjustment of the sampling amount can be performed manually. Although it is assumed that the sampling is performed manually, it is also possible to configure the device to perform automatic sampling.

Next, a test fuel blending device capable of such automatic collection and a test fuel blending method that can be executed using the same will be described.

(Other embodiments)
FIG. 3 shows a schematic configuration of a test fuel blending device according to another embodiment of the present invention.

This embodiment is similar to the above-described embodiment except that it is capable of automatically collecting multiple types of standard fuel and automatically taring an electronic scale, and also has control means for these functions. They have similar configurations and functions. Therefore, in the following description, the same reference numerals as those shown in FIG. 1 and FIG. do.

As shown in FIG. 3, in the test fuel blending device 10 according to the present embodiment, the injection means 12 includes lower tanks T11 and T12, pumps P11 and P12, pump drive circuit PD11, pumping pipes L11 and L12, and an upper tank. It is configured to include T21, T22, injection valves V41, V42 (electrically driven valves), injection pipes L21, L22, valve drive actuators M11, M12, and valve drive circuit VD21.

The injection valves V41 and V42 are electrically driven valves whose opening and closing operations are controlled by the valve drive circuit VD21 via the corresponding valve drive actuators M11 and M12. It includes needle valve bodies Nv1 and Nv2 having tapered surfaces that separate.

These injection valves V41 and V42 use a combination of the aforementioned electrically driven valve whose opening/closing is controlled by the valve drive circuit VD21, and a manual flow rate adjustment valve connected in series to the electrically driven valve. There may be.

The test fuel blending device 10 further includes an electronic scale 13 with a zero reset function that allows tare deletion, a flat panel display 14 for outputting a target value of sampling weight, and a setting capable of setting various parameters and operating conditions. controller that controls the electronic scale 13, flat panel display 14, pump pumps P11, P12, and injection valves V41, V42 based on the setting information of the setting device 15 and the measurement value information of the electronic scale 13. 16.

The electronic scale 13 has a taring function (automatic taring) that automatically erases the tare weight as a tare weight when the sampling period of the preceding one of the multiple types of standard fuels RF1 and RF2 has passed, or an external taring function. It has a built-in weighing control circuit with a zero reset function that can erase the tare weight in response to the zero reset request signal of When performing this, the net weight of the type being collected can be measured and displayed for each type of the plurality of standard fuels RF1 and RF2 by executing the tare erasing process.

The flat panel display 14 is a display panel capable of displaying the net weight of each type of multiple types of standard fuels RF1 and RF2, and preferably when the net weight of each type of multiple types of standard fuels RF1 and RF2 is being collected. The display is switched so that the types are displayed sequentially.

The setting device 15 determines the amount of test fuel to be mixed in the mixing container 11, the target property value, for example, the research octane number (RON), the types of standard fuels RF1 and RF2, and the sampling for each type. The controller 16 is a device that can input settings such as the order of operations, execution conditions for the automatic tearing and zero reset described above, etc., to the controller 16, and has a keyboard or a touch panel type operation input device. The setting device 15 also functions as a means for requesting the start of operation of the test fuel blending device 10 under the set conditions.

In addition to the CPU, ROM, RAM, etc., the controller 16 includes an input interface circuit for receiving setting information from the setting device 15 and a weighing signal from the electronic scale 13, and controls the pump drive circuit PD11 and the valve drive circuit VD21. It is a computer-configured control means having an output interface circuit capable of outputting an output and further outputting a signal requesting the above-mentioned automatic tearing and zero reset to the electronic scale 13.

This controller 16 is capable of performing multiple control functions by executing multiple control programs stored in advance in a ROM, etc., and has multiple control function units as shown in functional blocks in FIG. It consists of

The parameter setting unit 61 can set various parameters necessary for blending test fuel by the test fuel blending device 10 in accordance with setting information input from the setting device 15. The various parameters include the blended amount of the test fuel and the octane number after blending, which are setting information from the setting device 15, as well as multiple types of standard fuel RF1 that can be calculated from these input values in the same manner as in one embodiment. , RF2, automatic setting values such as target values for sampling weight (net weight corresponding to sampling amount) and corresponding opening/closing times of injection valves V41 and V42 are included.

When an operation start request is input from the setting device 15 to the controller 16, the sampling amount control section 62 selects a plurality of types of standards according to the various parameters set in the parameter setting section 61 and the weighing signal from the electronic scale 13. By controlling the opening and closing of injection valves V41 and V42 for each type of fuel RF1 and RF2, the amount of the plurality of standard fuels RF1 and RF2 collected into the mixing container 11 is controlled.

In addition, the collection amount control unit 62 gradually opens the injection valve V41 on the standard fuel RF1 side of isooctane in accordance with the change in the weight measurement value by the electronic scale 13, and collects the standard fuel RF1 into the mixing container 11. When the weight measurement value approaches the target sampling weight q1 of the standard fuel RF1, the injection valve V41 is gradually closed so that the injection valve V41 becomes fully closed when the target sampling weight q1 is reached. The opening degree is variably controlled.

Similarly, the collection amount control unit 62 gradually opens the valve V42 on the standard fuel RF2 side of n-heptane in response to changes in the weight measurement value by the electronic scale 13, and collects the standard fuel RF2 into the mixing container 11. When the measured weight value approaches the target sampling weight q2 of the standard fuel RF2, the injection valve V42 is gradually closed, and injection is performed so that the injection valve V42 becomes fully closed when the target sampling weight q2 is reached. The opening degree of valve V42 is variably controlled.

When the operation start request is input from the setting device 15 to the controller 16, the weighing control unit 63 checks the weighing signal of the electronic scale 13 and performs tare erasing processing to reset the measured value of the weight of the compounding container 11 to zero. It is set to run. In addition, the weighing control unit 63 requests the above-mentioned automatic tearing and zero reset within a predetermined time at the time when the sampling of the standard fuel RF1, which is sampled in advance among the plurality of types of standard fuels RF1 and RF2, is completed. It is supposed to be done. However, such a function of the weighing control unit 63 may be omitted and replaced with the built-in function of the electronic scale 13 if automatic tearing after a predetermined time is possible. In that case, the weighing control section 63 may request the display control section 64 to display that tare erasure is necessary, and may have the flat panel display 14 display that manual setting for tare erasure is required.

The display control section 64 switches and displays the net weights of the plurality of types of standard fuels RF1 and RF2 on the flat panel display 14 for each type according to the weighing control signal from the weighing control section 63 and the parameters set in the parameter setting section 61. Display control can be performed.

Further, the display control unit 64 of the controller 16 displays a target value q1 (or q2) of the net weight for storing a specific type of standard fuel RF1 (or RF2) in the blending container 11, which is measured by the electronic scale 13. has been set in advance by the parameter setting unit 61, the target value q1 of the net weight is displayed on the flat panel display 14 during the sampling period when a specific type of standard fuel RF1 (or RF2) is injected into the blending container 11. (or q2) also functions as a sampling weight target value output means for displaying and outputting. If the flat panel display 14 displays the net weights of the plurality of standard fuels RF1 and RF2 in a fixed manner, the display control unit 64 may be omitted.

The fuel replenishment control unit 65 cooperates with the sampling amount control unit 62 to output a fuel replenishment control signal to the pump drive circuit PD11 to selectively operate the pumps P11 and P12, thereby controlling the test fuel blending device 10. The unit of pumping amount is the amount of standard fuels RF1 and RF2 of multiple types used for one mixing of test fuel, and for each predetermined number of mixings, the amount of standard fuels of multiple types equivalent to the amount of sampling for that number of times is calculated. Pump operation control is executed to pump up fuels RF1 and RF2 into upper tanks T21 and T22.

Further, the flat panel display 14 and the display control unit 64 of the controller 16 display a target sampling weight q1 (a first net weight target During a first sampling period in which a specific type of standard fuel RF1 is injected into the blending container 11 under a condition in which a specific type of standard fuel RF1 is set in advance The target sampling weight q2 (target value of the second net weight) of the standard fuel RF2 for accommodating another type of standard fuel RF2 among the plurality of the plurality of standard fuels RF2 in the mixing container 11 constitutes the sampling weight target value output means. a second sampling weight target value output means for displaying and outputting a target sampling weight q2 during a second sampling period in which another type of standard fuel RF2 is injected into the blending container 11 under preset conditions; It consists of

Furthermore, the sampling amount control unit 62 of the injection means 12 and the controller 16 controls the injection amount control unit 62 of the specific type of standard fuel RF1 until the net weight of the specific type of standard fuel RF1 reaches the target sampling weight q1 during the first sampling period described above. While the standard fuel RF1 is injected into the blending container 11, when the net weight of the specific kind of standard fuel RF1 reaches the target sampling weight q1, the injection of the specific kind of standard fuel RF1 into the blending container 11 is stopped. During the second sampling period, the other type of standard fuel RF2 is adjusted until the net weight of the other type of standard fuel RF2 reaches the target sampling weight q2. is injected into the blending container 11, while stopping the injection of the other kind of standard fuel RF2 into the blending container 11 when the net weight of the other kind of standard fuel RF2 reaches the target sampling weight q2. This constitutes an injection amount adjusting means.

The test fuel blending device 10 of the present embodiment configured as described above measures the net weight of the plurality of types of standard fuels RF1 and RF2 housed in the blending container 11 for each type using the electronic scale 13. The value (weighed value) can be output.

Then, the electronic scale 13, which is a net weight measuring means for each type, measures and displays the net weight of the plurality of types of standard fuels RF1 and RF2 stored in the blending container 11 for each type, and displays the net weight of the first and second fuels. The flat panel display 14 and the display control unit 64 of the controller 16, which are sampling weight target value output means, output the target sampling weight q1 (first net weight target value) of the standard fuel RF1 during the first sampling period. At the same time, the target sampling weight q2 (target value of the second net weight) of the standard fuel RF2 is displayed and output during the second sampling period.

Next, another embodiment of the test fuel blending method using the test fuel blending device 10 of this embodiment will be described.

The test fuel preparation method of the other embodiments can also be carried out using substantially the same procedure as that of the embodiment shown in FIG.

That is, as shown in FIG. 2, first, the blended amount Q [ml] and the octane number (RON) after blending are set and input (step S11).

At this time, the parameter setting unit 61 sets a target value of the net weight (target sampling weight) corresponding to the sampling amount of each sample in response to the preparation amount Q [ml] and the setting value input of RON from the setting device 15. , the sampling weights q1 and q2 are calculated using, for example, the above-mentioned equations (1) and (2), and are automatically set (step S12).

Also, depending on whether an operation start request is input from the setting device 15 to the controller 16 or when the mixing container 11 is placed on the electronic scale 13, the weighing signal of the electronic scale 13 is checked in advance and the weight of the mixing container 11 is measured. Execute tare erasure processing to reset the measured value to zero and leave it in the initial tare erasure state.

Next, the net weight corresponding to the sampling amount of the standard fuel RF1 of isooctane is displayed on the flat panel display 14 as the target sampling weight q1 [g] (step S13).

Next, in response to changes in the weighing signal (weight measurement value) of the electronic scale 13 from which the tare has been erased, the injection valve V41 on the isooctane standard fuel RF1 side is gradually opened to collect the standard fuel RF1 into the mixing container 11. go. Also, during this sampling period, the target sampling weight q1 of the standard fuel RF1 is displayed on the flat panel display 14 (step S14).

Then, the predetermined sampling flow rate is maintained until the weight measurement value of the electronic scale 13 reaches the preliminary target sampling weight q1' which is smaller than the final target sampling weight q1 (if NO in step S15), and the weight measurement value is used as the preliminary sampling weight. When the target sampling weight q1' is reached (YES in step S15), sampling amount limiting control is executed to gradually reduce the opening degree of the injection valve V41 until the weight measurement value reaches the final target sampling weight q1. (If NO in steps S16 and S17).

When the weight measurement value of the electronic scale 13 reaches the target sampling weight q1 (YES in step S17), the injection valve V41, which is the first needle valve, is fully closed (step S18).

Next, after taring the mixing container 11 in which the octane standard fuel was collected and erasing the tare by zero-setting the electronic scale 13 (step S19), the net weight corresponding to the sampling amount of the n-heptane standard fuel RF2 is set as the target sampling weight. It is displayed on the flat panel display 14 as q2[g] (step S20).

Next, in response to changes in the weight measurement value of the electronic scale 13 after taring, the injection valve V42 on the n-heptane standard fuel RF2 side is gradually opened to collect the standard fuel RF2 into the mixing container 11. Also, during this sampling period, the target sampling weight q2 of the standard fuel RF2 is displayed on the flat panel display 14 (step S21).

Then, the predetermined sampling flow rate is maintained until the weight measurement value of the electronic scale 13 reaches the preliminary target sampling weight q2' which is smaller than the final target sampling weight q2 (if NO in step S22), and the weight measurement value is used as the preliminary sampling weight. When the target sampling weight q2' is reached (YES in step S22), sampling amount limiting control is executed to gradually reduce the opening degree of the injection valve V42 until the weight measurement value reaches the final target sampling weight q2. (If NO in steps S23 and S24).

Then, when the weight measurement value of the electronic scale 13 reaches the target collection weight q2 (YES in step S24), the injection valve V42, which is the second needle valve, is fully closed (step S25).

In this embodiment, in this way, the same sampling operation as in one embodiment is automatically executed, and the standard fuel RF1 with the target sampling weight q1 is accurately sampled, and the standard fuel RF2 with the target sampling weight q2 is accurately sampled. Collect.

Then, the blending container 11 after collecting both standard fuels RF1 and RF2 is taken out from the electronic scale 13 and stirred and mixed.

In this way, in this embodiment as well, the test fuel preparation method includes the above-mentioned net weight measurement step for each type, the first injection amount adjustment step, and the second injection amount adjustment step, as in the first embodiment. can be executed.

Therefore, in this embodiment as well, it is possible to facilitate the blending operation of the test fuel, and to achieve both the target octane number (property value) and mixing capacity of the test fuel and a sufficient blending processing speed. Accuracy can also be improved, and the same effects as in one embodiment can be obtained.

As explained above, the test fuel blending device according to the present invention does not require the use of multiple flowmeters, and achieves both the target properties and mixing capacity of the test fuel and a sufficient blending processing speed. This method is effective for all test fuel preparation methods and devices in which a test fuel is prepared by mixing multiple types of liquid standard fuels with different properties in a ratio corresponding to the target properties.

10 Test fuel blending device 10M main body case 11 blending container 12 injection means (first injection amount adjustment means, second injection amount adjustment means)
13 Electronic scales (net weight measuring means for each type)
13a Tare erase request switch 13b Digital display panel 14 Flat panel display (first and second sampling weight target value output means)
14A flat panel (first sampling weight target value output means)
14B Flat panel (second sampling weight target value output means)
15 Setting device 15a Operation input device 15b Arithmetic processing section 16 Controller 31, 32 Opening/closing door 33, 34 Transparent door 61 Parameter setting section 62 Collection amount control section 63 Weighing control section 64 Display control section 65 Fuel replenishment control section D1, D2 Replenishment alarm Level detector G1, G2 Level gauge Kv1, Kv2 Valve operation knob L11, L12 Pumping piping L21, L22 Injection piping M11, M12 Valve drive actuator Nv1, Nv2 Needle valve body P11, P12 Pumping pump PD11 Pump drive circuit Q Blend amount q1 Target collection weight (target value of first net weight)
q1', q2' Reserve target sampling weight q2 Target sampling weight (target value of second net weight)
RF1 standard fuel (certain type of standard fuel)
RF2 standard fuel (other kind of standard fuel)
T11, T12 Lower tank T21, T22 Upper tank V21 Injection valve (manually operated flow rate adjustment valve, first injection amount adjustment means)
V22 Injection valve (manually operated flow rate adjustment valve, second injection amount adjustment means)
V41 Injection valve (electrically driven valve, first injection amount adjustment means)
V42 Injection valve (electrically driven valve, second injection amount adjustment means)
Va1, Va2 Breathing valve (air vent valve)
VD21 Valve drive circuit ρ Density

Claims (7)

A test fuel preparation method for preparing a mixed fuel for testing with predetermined properties by mixing multiple types of liquid standard fuels with different properties at a predetermined ratio corresponding to target properties, the method comprising:
an injection step of flowing down and injecting the plurality of types of standard fuel into a mixing container so as to sequentially collect each type;
a net weight measuring step for each type of measuring and outputting the net weight of the collected amount of the plurality of types of standard fuels stored in the blending container;
A first net weight target value for sampling a specific type of standard fuel among the plurality of types into the blending container is set at a first sampling point when the specific type of standard fuel is injected into the blending container. a first collection weight target value output step to be output during the period;
During the first sampling period, the specific type of standard fuel is supplied via a first injection valve with a variable opening until the net weight of the specific type of standard fuel reaches the first net weight target value. of standard fuel is injected into the dispensing container through the first injection valve , when the net weight of the particular kind of standard fuel reaches the first net weight target value. a first injection amount adjustment step of stopping the injection of the specific type of standard fuel into the fuel cell;
A second net weight target value for sampling another type of standard fuel among the plurality of types into the blending container is determined by determining a second net weight target value for sampling another type of standard fuel among the plurality of types into the blending container. a second collection weight target value output step to be output during the period;
During the second sampling period, the other type of standard fuel is supplied via a second injection valve with a variable opening until the net weight of the other type of standard fuel reaches the second net weight target value. of standard fuel is injected into the blending container through the second injection valve when the net weight of the other kind of standard fuel reaches the second net weight target value. a second injection amount adjustment step of stopping injection of the other kind of standard fuel into the fuel cell ;
In each step of the first injection amount adjustment step and the second injection amount adjustment step, the amount of the sampled amount is determined based on the net weight of the sampled amount of standard fuel of the corresponding type among the plurality of types. The opening degree of the first or second injection valve is increased until the measured value of the net weight reaches a preliminary target sampling weight for each type, which is smaller than the target value of the first or second net weight, to obtain a predetermined sampling flow rate. Meanwhile, the first or second injection valve is operated from when the measured value of the net weight of the sampled amount reaches the preliminary target sampled weight until the measured value of the net weight of the sampled amount reaches the first or second target value of the net weight. A test fuel preparation method characterized by limiting the sampling flow rate by reducing the opening degree . In the net weight measuring step for each type, the net weight of the plurality of types of standard fuels is measured while erasing the tare for each type using an electronic scale having a zero reset function capable of erasing the tare. 1. The test fuel preparation method described in 1. In the net weight measuring step for each type, the net weight of the plurality of types of standard fuels contained in the blending container is measured and displayed for each type, and
In the first collection weight target value output step, displaying and outputting the first net weight target value during the first collection period,
3. The test fuel formulation according to claim 1, wherein in the second sampling weight target value outputting step, the second net weight target value is displayed and output during the second sampling period. Method. 3. The test fuel blending method according to claim 1, wherein the test mixed fuel is a fuel for an anti-knock property measurement test of a spark ignition engine. A test fuel blending device that prepares a mixed fuel for testing with predetermined properties by mixing multiple types of liquid standard fuels with different properties at a predetermined ratio corresponding to the target properties,
a mixing container containing the plurality of types of standard fuel;
Injection means for injecting the plurality of types of standard fuel into the mixing container in a manner that sequentially collects each type of standard fuel;
net weight measuring means for each type, which measures and outputs the net weight of the collected amount of the plurality of types of standard fuels stored in the mixing container;
A first net weight target value for collecting a specific type of standard fuel among the plurality of fuels into the blending container is set, and the first net weight target value is set to collect a specific type of standard fuel in the blending container. a first sampled weight target value output means for outputting a first sampled weight target value during a first sampled period in which a type of standard fuel is injected;
During the first sampling period, the specific type of standard fuel is supplied via a first injection valve with a variable opening until the net weight of the specific type of standard fuel reaches the first net weight target value. of standard fuel is injected into the dispensing container through the first injection valve , when the net weight of the particular kind of standard fuel reaches the first net weight target value. first injection amount adjusting means for stopping injection of the specific type of standard fuel into the fuel cell;
A second net weight target value for collecting another type of standard fuel among the plurality of fuels into the blending container is set, and a second net weight target value is set for collecting the other type of standard fuel in the blending container. a second sampling weight target value output means for outputting during a second sampling period in which a type of standard fuel is injected;
During the second collection period, the other type of standard fuel is fed through the second injection amount adjusting means with variable opening until the net weight of the other type of standard fuel reaches the second net weight target value. one kind of standard fuel is injected into the blending container, and when the net weight of the other kind of standard fuel reaches the second net weight target value, the second injection amount adjusting means is injected into the mixing container. a second injection amount adjusting means for stopping injection of the other type of standard fuel into the mixing container;
Each of the first injection amount adjusting means and the second injection amount adjusting means adjusts the net weight of the sampled amount of standard fuel of the corresponding type among the plurality of types based on the net weight of the sampled amount. The opening degree of the first or second injection valve is increased until a predetermined sampling flow rate is achieved by increasing the opening degree of the first or second injection valve until the measured weight reaches a preliminary target sampling weight for each type that is smaller than the target value of the first or second net weight. Meanwhile, the first or second injection valve is opened until the measured value of the net weight of the sampled amount reaches the preliminary target sampled weight and reaches the first or second target value of the net weight. A test fuel blending device characterized by limiting the sampling flow rate by reducing the flow rate . 6. The test fuel blending device according to claim 5, wherein the net weight measuring means for each type is comprised of an electronic scale having a zero reset function capable of erasing tare. The test fuel preparation according to claim 5 or 6, wherein the first injection amount adjusting means and the second injection amount adjusting means each include an electrically driven valve having a needle valve body. Device.

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