JP5690119B2 - Lubricating oil and light oil fuel pass / fail judgment system - Google Patents

Description

  The present invention relates to a quality determination system for lubricating oil and light oil fuel.

  In general, automobile lubricant oil deteriorates as it travels, so it is necessary to periodically measure the deterioration state of the lubricant and replace the lubricant according to the degree of deterioration. Currently, there is only a method to check the deterioration state of the lubricating oil with the oil gauge in the engine room by opening the hood of the car, so the lubricating oil has deteriorated unless the user consciously checks the deterioration state of the lubricating oil. There is a risk of being left unattended.

  In addition, diesel engines mounted on automobiles are designed to operate optimally with diesel oil as fuel, and use diesel fuel or cheaper diesel oil, which is cheaper than diesel oil, to damage diesel engines. There is a fear that the use of such poor fuel oil must be avoided, but in developing countries, there are cases where bad fuel oil is sold by vicious vendors, and the user remains unaware. In some cases, poor diesel fuel has been purchased and used.

In recent years, biofuels (BDF [registered trademark] / Bio Diesel Fuel) can be mixed with about 5% as an alternative to light oil for buses, heavy trucks, construction machinery, ships and military vehicles. I'm starting to break. This type of biofuel is produced by methanol treatment or hydrocracking of general animal and vegetable oils and fats. If it exceeds 5%, the biofuel dissolves in the lubricating oil and dilutes the lubricating oil. Biofuel contamination should not exceed 5% due to the possibility of clogging the fuel filter due to the formation of solids, but the user may exceed 5% contamination with biofuel. The fact is that there is no way to check whether or not.

  For this reason, it is desired to introduce an in-vehicle system that can automatically determine whether the currently used lubricating oil is deteriorated or whether the light oil fuel is of acceptable quality. The following Patent Document 1 and the like have been proposed as an in-vehicle system for determining the deterioration of the lubricating oil, and the following Patent Document 2 and the like have been proposed as an in-vehicle system for identifying the type of fuel.

JP-A-5-10866- JP 2009-210568 A

  However, all the in-vehicle systems that have been proposed so far measure the viscosity of the lubricating oil flowing in the piping while the engine is running to determine the degree of deterioration, or measure the viscosity of the fuel in the fuel tank. Since it is of a type that identifies the fuel, it is difficult to accurately measure the viscosity due to the influence of engine vibration, and the biofuel does not change greatly due to the mixing degree, so the mixing degree of the biofuel is excessive It was not possible to judge whether or not.

  The present invention has been made in view of the above circumstances, and in automatically determining the quality of the lubricating oil and light oil fuel used in a diesel engine, viscosity measurement with higher accuracy than before has been realized to make an accurate determination. The purpose is to get.

  The present invention is a system for automatically determining the quality of lubricating oil and light oil fuel used in a diesel engine by a determination unit mounted on the diesel engine, and is provided in the determination unit to supply a predetermined amount of lubricating oil. An oil chamber that can be stored, an oil line that guides a part of lubricating oil used in a diesel engine, passes through the upper part of the oil chamber, and then sends it out of the determination unit; and an upstream side of the oil chamber in the oil line And a lubricating oil on-off valve for opening and closing the flow path, a lubricating oil viscosity sensor provided in the oil chamber for measuring the viscosity of the lubricating oil, and a predetermined amount of light oil fuel stored in the determination unit. A possible fuel chamber and a portion of the light oil fuel used in a diesel engine through the upper part of the fuel chamber A fuel line that is sent out of the determination unit, a fuel on-off valve that opens and closes a flow path upstream of the fuel chamber in the fuel line, and a fuel viscosity sensor that is provided in the fuel chamber and measures the viscosity of light oil fuel The lubricant oil / light oil fuel is sampled in the oil chamber and the fuel chamber by controlling the lubricant oil on / off valve and the fuel on / off valve during operation of the diesel engine, and after the diesel engine is stopped, the lubricant viscosity sensor and fuel And a control device that determines the quality by measuring the viscosity of the lubricating oil and light oil fuel collected by the viscosity sensor.

  Thus, if the control device opens the on-off valve for fuel oil and the on-off valve for fuel while the diesel engine is in operation, a part of the lubricating oil extracted from the diesel engine flows to the oil line. Then, after passing through the oil chamber, it is returned to the oil pan, and part of the light oil fuel extracted from the return pipe from the common rail to the fuel tank circulates in the fuel line and passes through the fuel chamber. To the return pipe.

  At this time, each of the oil chamber and the fuel chamber is cleaned by continuous inflow of lubricating oil and light oil fuel. After that, when the lubricating oil on-off valve and the fuel on-off valve are closed, the oil line and the fuel line The circulation of the lubricating oil and the light oil fuel is stopped, and a predetermined amount of the lubricating oil and the light oil fuel are collected in the oil chamber and the fuel chamber, respectively.

  Then, after the diesel engine is stopped, the viscosity of the collected lubricating oil and light oil fuel is measured by the lubricating oil viscosity sensor and the fuel viscosity sensor. When the diesel engine is stopped and no vibration occurs, the lubricating oil and light oil fuel are stopped. It is possible to accurately measure the viscosity of the oil, and the quality of the lubricating oil and light oil fuel is accurately determined based on the highly accurate measurement result.

  For example, in determining the quality of lubricating oil and light oil fuel based on the measurement results of the viscosity of lubricating oil and light oil fuel, the viscosity data of undegraded lubricating oil for diesel engines and pure light oil with no mixture The control unit is provided with fuel viscosity data, and this data is compared with the measured lubricating oil and light oil fuel viscosities. It is sufficient to determine whether or not the fuel is of poor quality (whether it is a poor light oil fuel in which kerosene, heavy oil, or undesulfurized light oil is mixed).

  Furthermore, in the present invention, the fuel chamber is provided below the oil chamber in the determination unit, and the bottom of the oil chamber and the ceiling of the fuel chamber are communicated by a communication line, and the fuel chamber flows in the middle of the communication line. A mixing on-off valve for opening and closing the passage is provided, and the mixing on-off valve is opened after measurement of the viscosity of the lubricating oil and light oil fuel, and the lubricating oil in the oil chamber is dropped into the fuel chamber to mix with the light oil fuel and mixing It is preferable to configure the control device so that the viscosity of the oil is measured by a fuel viscosity sensor to determine the biofuel mixing degree.

  In this way, after the viscosity of the lubricating oil and light oil fuel is measured by the control device, the mixing on-off valve is opened, the lubricating oil in the oil chamber falls into the fuel chamber and mixes with the light oil fuel, and the viscosity of the mixed oil Is measured by the fuel viscosity sensor to determine the degree of biofuel contamination.

  In other words, it is difficult to determine the degree of biofuel contamination by simply measuring the viscosity of light oil fuel with a fuel viscosity sensor in the fuel chamber. However, biofuel has the property of easily dissolving in lubricating oil, and the degree of biofuel contamination. If the value is high, the viscosity measured by the fuel viscosity sensor is greatly reduced, so that it is possible to determine the degree of biofuel mixing based on the degree of change in the viscosity.

  In the present invention, the temperature detecting means for detecting the temperature of the lubricating oil in the oil chamber is provided, and the lubricating oil on-off valve and the fuel on-off valve are opened and detected by the temperature detecting means immediately after the start of the diesel engine. Preferably, the control device is configured to close the lubricating oil on-off valve and the fuel on-off valve when the temperature of the lubricating oil reaches a specified temperature.

  In this way, immediately after starting the diesel engine, the lubricating oil and light oil fuel are allowed to flow through the oil line and fuel line by opening the lubricating oil on-off valve and fuel on-off valve, and the temperature of the lubricating oil detected by the temperature detecting means When the specified temperature is reached, the lubricating oil on-off valve and fuel on-off valve are closed and a predetermined amount of lubricating oil and light oil fuel are collected in the oil chamber and fuel chamber. Lubricating oil and light oil fuel can be collected.

  In addition, since the determination unit is mounted in the diesel engine and stored in the engine room, the lubricating oil and light oil fuel collected in this way are easily maintained at a temperature suitable for viscosity measurement. The temperature does not drop immediately after the stop.

  In addition, if sampling is completed when the temperature of the lubricating oil reaches the specified temperature, there is a risk that the lubricating oil at an extremely high temperature will flow into the oil line when climbing up and damage the viscosity sensor for lubricating oil. It can be avoided.

  Further, in this case, it is preferable to provide a temporary reservoir chamber capable of storing a predetermined amount of lubricating oil upstream of the lubricating oil on-off valve in the determination unit. The diesel engine was stopped while the lubricating oil was at a very high temperature during climbing, etc., and the diesel engine was restarted even though the lubricating oil on the diesel engine side was still at a very high temperature due to preheating, and the lubricating oil was collected. In such a case, the lubricating oil stored in the temporary storage chamber plays a role of buffering heat.

  In other words, the extremely high temperature lubricating oil from the diesel engine may be mixed with the relatively low temperature lubricating oil in the temporary storage chamber, resulting in a decrease in temperature, and the lubricating oil viscosity sensor may be exposed to the extremely high temperature lubricating oil. Therefore, when the temperature of the lubricating oil in the oil chamber reaches a specified temperature, the fuel on-off valve is closed to protect the lubricating oil viscosity sensor.

  According to the above-described quality determination system for the lubricating oil and light oil fuel of the present invention, the following various excellent effects can be obtained.

  (I) According to the invention described in claim 1 of the present invention, the lubricating oil on-off valve and the fuel on-off valve are controlled during operation of the diesel engine so that the lubricating oil and light oil fuel are placed in the oil chamber and the fuel chamber. Samples can be collected in a fixed amount, and the viscosity of lubricant oil and light oil fuel that have been collected can be accurately measured with the viscosity sensor for lubricants and the viscosity sensor for fuels in a state where there is no vibration after the diesel engine stops. The quality of the lubricating oil and light oil fuel can be accurately determined based on the highly accurate measurement result.

  (II) According to the invention described in claim 2 of the present invention, the mixing on-off valve is opened after the measurement of the viscosity of the lubricating oil and the light oil fuel, and the lubricating oil in the oil chamber is dropped into the fuel chamber. By mixing and measuring the viscosity of the mixed oil with a fuel viscosity sensor, it is possible to realize the determination of the degree of biofuel mixing, which has been difficult to determine simply by measuring the viscosity of light oil fuel.

  (III) According to the invention described in claim 3 of the present invention, the lubricating oil and the light oil fuel are allowed to flow through the oil line and the fuel line immediately after starting the diesel engine, and the lubrication is performed when the temperature of the lubricating oil reaches a specified temperature. A predetermined amount of lubricating oil and light oil fuel can be collected in the oil chamber and the fuel chamber by closing the oil on-off valve and the fuel on-off valve, so that the lubricating oil and light oil fuel at a sufficiently high temperature suitable for viscosity measurement are used. In addition, it is possible to avoid the possibility that the lubricating oil at a very high temperature flows into the oil line and damages the lubricating oil viscosity sensor when climbing.

  (IV) According to the invention described in claim 4 of the present invention, the diesel engine is immediately restarted after the diesel engine is stopped while the lubricating oil is at a very high temperature when climbing or the like. Even if the sampling of oil is started, the lubricating oil stored in the temporary storage chamber can be used to buffer the heat, so the lubricating oil viscosity sensor is exposed to extremely high temperature lubricating oil. It is possible to avoid the fear of being lost.

It is the schematic which shows an example of the form which implements this invention. It is a schematic diagram which shows the internal structure of the determination unit of FIG. It is a block diagram which shows the control system of the determination unit of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 show an example of an embodiment of the present invention. Reference numeral 1 in FIG. 1 denotes a diesel engine, 2 denotes a fuel tank, a fuel supply pipe 3 and a fuel filter 4 from the fuel tank 2. The light oil fuel 5 guided through the fuel is boosted by the fuel pump 6 and stored in the common rail 7, and the light oil fuel 5 in the common rail 7 is provided for each cylinder of the diesel engine 1 through the injection pipe 8. The light oil fuel 5 is supplied to the cylinder 9 and injected into the cylinders, and is relieved from the common rail 7 in order to maintain the inside at a predetermined pressure. It is supposed to be returned.

  In this embodiment, the quality of the lubricating oil 11 and the light oil fuel 5 used in the diesel engine 1 as described above is automatically determined by the determination unit 12 mounted on the diesel engine 1. Lubricating oil 11 is guided to the determination unit 12 from the cylinder head 1a of the diesel engine 1 through the rubber hose 13 and guided through the determination unit 12, and the lubricating oil 11 passing through the determination unit 12 passes through the rubber hose 14 in the diesel engine 1. The oil oil 5 is poured back into the oil pan 1b and returned, and a part of the light oil fuel 5 is led from the return pipe 10 through the rubber hose 15 and guided, and the light oil fuel 5 passing through the determination unit 12 passes through the rubber hose 16. It is made to flow down into the return pipe 10 and return.

The internal structure of the determination unit 12 is as shown in FIG. 2, and an oil chamber 17 capable of storing a predetermined amount (about 1 cm ³ ) of the lubricating oil 11 is provided at an appropriate position in the determination unit 12. An oil line 18 that extends downward from the top of the determination unit 12 reaches the upper part of the oil chamber 17 and extends laterally after passing through the upper part of the oil chamber 17 and protrudes to the side of the determination unit 12. A rubber hose 13 is connected to the upper end of the oil line 18 so that a part of the lubricating oil 11 is guided from the cylinder head 1a of the diesel engine 1, and a rubber hose is connected to the lower end of the oil line 18. 14 is connected so that the lubricating oil 11 is sent out to the oil pan 1 b of the diesel engine 1.

  Furthermore, a lubricating oil on-off valve 19 for opening and closing the flow path is provided on the upstream side of the oil chamber 17 in the oil line 18, and a predetermined amount of oil is provided on the upstream side of the lubricating oil on-off valve 19. A temporary storage chamber 20 that can store the lubricating oil 11 is provided, and a lubricating oil viscosity sensor 21 that measures the viscosity of the lubricating oil 11 is provided in the oil chamber 17.

  Here, various types of systems can be employed for the lubricating oil viscosity sensor 21, but in this embodiment, as described later, the viscosity of the diesel engine 1 without any vibration after the diesel engine 1 is stopped. Since the measurement is performed, a system that includes a heat generating part (heater part) and an ultra-precise temperature measuring part and measures the viscosity with a slight temperature change caused by the flow of the lubricating oil 11 due to slight heat generation of the heat generating part. Is used, and also functions as temperature detecting means for detecting the temperature of the lubricating oil 11 in the oil chamber 17.

Further, a fuel chamber 22 capable of storing a predetermined amount (about 1 cm ³ ) of light oil fuel 5 is provided below the oil chamber 17 in the determination unit 12, and a determination above the fuel chamber 22 is provided. Extends laterally from the side of the unit 12 and then bends downward to reach the upper part of the fuel chamber 22, and then extends laterally after passing through the upper part of the fuel chamber 22 to the lateral part of the determination unit 12. A protruding fuel line 23 is provided, and a rubber hose 15 is connected to an upper end portion of the fuel line 23, and a part of the light oil fuel 5 is guided from the return pipe 10, and to the lower end portion of the fuel line 23. A rubber hose 16 is connected so that the light oil fuel 5 is returned to the return pipe 10.

  Further, on the upstream side of the fuel chamber 22 in the fuel line 23, a fuel on-off valve 24 that opens and closes a flow path is provided, and in the fuel chamber 22, fuel for measuring the viscosity of the light oil fuel 5 is measured. A viscosity sensor 25 is provided, and the same type as that of the above-described lubricating oil viscosity sensor 21 is employed.

  In addition, in the present embodiment, the bottom of the oil chamber 17 and the ceiling of the fuel chamber 22 are communicated with each other by a communication line 26, and the mixing opening / closing for opening and closing the flow path is in the middle of the communication line 26. A valve 27 is provided.

  As shown in FIG. 3, the on-off operation of the above-described on-off valve 19 for fuel, the on-off valve 24 for fuel, and the on-off valve 27 for mixing is controlled by control signals 19x, 24x, 27x from the control device 28. In addition, the detection signals 21y and 25y from the lubricating oil viscosity sensor 21 and the fuel viscosity sensor 25 are input to the control device 28, and the control device 28 and the engine control computer. 29 (ECU: Electronic Control Unit) is connected to share information related to the starting and stopping of the diesel engine 1.

  More specifically, immediately after the diesel engine 1 is started, the lubricating oil on-off valve 19 and the fuel on-off valve 24 are opened by the control device 28 and detected by the lubricating oil viscosity sensor 21 (temperature detecting means). When the temperature of the lubricating oil 11 reaches a specified temperature, the lubricating oil on-off valve 19 and the fuel on-off valve 24 are closed, and the lubricating oil 11 and the light oil fuel 5 are collected in the oil chamber 17 and the fuel chamber 22. It has become.

  In addition, after the diesel engine 1 is stopped, the viscosities of the collected lubricating oil 11 and light oil fuel 5 are measured by the lubricating oil viscosity sensor 21 and the fuel viscosity sensor 25, and the controller 28 determines the quality. In addition, after the viscosity of the lubricating oil 11 and the light oil fuel 5 is measured, the control device 28 opens the mixing on-off valve 27 and the lubricating oil 11 in the oil chamber 17 is dropped into the fuel chamber 22. The fuel oil is mixed with the light oil fuel 5, the viscosity of the mixed oil is measured by the fuel viscosity sensor 25, and the mixing degree of the biofuel is determined.

  In the present system, even after the diesel engine 1 is stopped, the viscosity measurement by the lubricating oil viscosity sensor 21 and the fuel viscosity sensor 25, the pass / fail judgment in the control device 28, and the opening operation of the mixing on-off valve 27 are performed. A power supply device (not shown) for this system is provided so as to perform the above.

  Thus, when the control device 28 opens the lubricating oil on-off valve 19 and the fuel on-off valve 24 immediately after the diesel engine 1 is started, a part of the lubricating oil 11 extracted from the cylinder head 1 a of the diesel engine 1 is obtained. A part of the light oil fuel 5 circulated through the oil line 18, returned to the oil pan 1 b after passing through the oil chamber 17, and extracted from the return pipe 10 from the common rail 7 to the fuel tank 2 is the fuel line. 23, is returned to the return pipe 10 after passing through the fuel chamber 22.

  At this time, each of the oil chamber 17 and the fuel chamber 22 is cleaned by the continuous flow of the lubricating oil 11 and the light oil fuel 5, and then the lubricating oil detected by the lubricating oil viscosity sensor 21 (temperature detecting means). When the lubricating oil on-off valve 19 and the fuel on-off valve 24 are closed when the temperature of the oil 11 reaches the specified temperature, the flow of the lubricating oil 11 and the light oil fuel 5 in the oil line 18 and the fuel line 23 is stopped, and the oil A predetermined amount of lubricating oil 11 and light oil fuel 5 are collected in the chamber 17 and the fuel chamber 22, respectively.

  In this way, it is possible to collect the lubricating oil 11 and the light oil fuel 5 having a sufficiently high temperature suitable for measuring the viscosity, and the determination unit 12 is mounted on the diesel engine 1 and accommodated in the engine room. Therefore, it is easy to maintain the temperature suitable for viscosity measurement, and the temperature does not decrease immediately after the diesel engine 1 is stopped.

  Further, if the sampling is completed when the temperature of the lubricating oil 11 reaches the specified temperature, the lubricating oil 11 having an extremely high temperature during climbing or the like may flow into the oil line 18 and damage the lubricating oil viscosity sensor 21. This can be avoided in advance.

  In addition, the diesel engine 1 is stopped while the lubricating oil 11 is at a very high temperature, for example, during climbing, and the diesel engine 1 is restarted even though the lubricating oil 11 on the diesel engine 1 side remains at a very high temperature due to preheating. In the case where the collection of the lubricating oil 11 is started after being started, the lubricating oil 11 stored in the temporary storage chamber 20 plays a role of buffering heat.

  That is, the temperature of the lubricating oil 11 from the diesel engine 1 is lowered by mixing with the relatively low temperature lubricating oil 11 in the temporary storage chamber 20, and the lubricating oil viscosity sensor 21 has a very high temperature lubricating oil. Therefore, when the temperature of the lubricating oil 11 in the oil chamber 17 reaches a specified temperature, the fuel on-off valve 24 is closed and the lubricating oil viscosity sensor 21 is protected. The

  Then, after the diesel engine 1 is stopped, when the viscosity of the collected lubricant 11 and light oil fuel 5 is measured by the lubricant viscosity sensor 21 and the fuel viscosity sensor 25, the diesel engine 1 is stopped and no vibration is generated. Thus, the viscosity of the lubricating oil 11 and the light oil fuel 5 can be accurately measured, and the quality of the lubricating oil 11 and the light oil fuel 5 is accurately determined based on the measurement result with high accuracy.

  For example, in determining the quality of the lubricating oil 11 and the light oil fuel 5 based on the measurement result of the viscosity of the lubricating oil 11 and the light oil fuel 5, the viscosity data of the undegraded lubricating oil 11 for the diesel engine 1, The controller 28 has the data of the viscosity of the pure light oil fuel 5 without any mixture, and the data is compared with the measured viscosity of the lubricating oil 11 and the light oil fuel 5, and the lubrication is performed based on the degree of deviation between them. The deterioration state of the oil 11 and whether or not the light oil fuel 5 is of acceptable quality (whether it is a poor light oil fuel 5 in which kerosene, heavy oil or undesulfurized light oil is mixed) are determined. Just keep it.

  The viscosity of the lubricating oil 11 and the light oil fuel 5 is measured at least under the condition that the temperature is relatively high immediately after the diesel engine 1 is stopped and the condition that the temperature is lowered to a predetermined temperature after a certain time after the diesel engine 1 is stopped. It is preferable to perform this twice. By doing so, it is possible to determine the viscosity with higher accuracy.

  Further, after the viscosity of the lubricating oil 11 and the light oil fuel 5 is measured, when the controller 28 opens the mixing on-off valve 27, the lubricating oil 11 in the oil chamber 17 falls into the fuel chamber 22 and mixes with the light oil fuel 5, The viscosity of the mixed oil is measured by the fuel viscosity sensor 25 to determine the biofuel mixing degree.

  That is, it is difficult to determine the degree of biofuel contamination simply by measuring the viscosity of the light oil fuel 5 with the fuel viscosity sensor 25 in the fuel chamber 22, but the biofuel has the property of being easily dissolved in the lubricating oil 11. If the fuel mixing degree is high, the viscosity measured by the fuel viscosity sensor 25 is greatly reduced. Therefore, it is possible to determine the biofuel mixing degree based on the degree of change in the viscosity.

  Here, the determination of the degree of biofuel mixing is carried out a plurality of times at predetermined time intervals, the change in viscosity accompanying the temperature drop is observed, and the change in viscosity of pure light oil fuel 5 containing no mixed substances is observed. By comparing, it becomes possible to determine the mixing degree of biofuel with higher accuracy.

Since the lubricating oil 11 required for measuring the viscosity may be as small as about 1 cm ³ , there is no possibility of causing any trouble even if it is returned to the fuel tank 2 as a mixed oil with the light oil fuel 5.

  Therefore, according to the above-described embodiment, the lubricating oil on-off valve 19 and the fuel on-off valve 24 are controlled during operation of the diesel engine 1 so that the lubricating oil 11 and the light oil fuel 5 are supplied to the oil chamber 17 and the fuel chamber 22 by a predetermined amount. It is possible to accurately collect the viscosity of the lubricant oil 11 and the light oil fuel 5 that have been collected by the lubricant viscosity sensor 21 and the fuel viscosity sensor 25 in a state in which vibration is eliminated after the diesel engine 1 is stopped. Therefore, the quality of the lubricating oil 11 and the light oil fuel 5 can be accurately determined based on the highly accurate measurement result.

  Further, the mixing on-off valve 27 is opened after the viscosity of the lubricating oil 11 and the light oil fuel 5 is measured, and the lubricating oil 11 in the oil chamber 17 is dropped into the fuel chamber 22 to mix with the light oil fuel 5, and the viscosity of the mixed oil. Is measured by the fuel viscosity sensor 25, so that it is possible to realize the determination of the degree of mixing of biofuel, which has been difficult to determine simply by measuring the viscosity of the light oil fuel 5 so far.

  Further, the lubricating oil 11 and the light oil fuel 5 are allowed to flow through the oil line 18 and the fuel line 23 immediately after the diesel engine 1 is started, and when the temperature of the lubricating oil 11 reaches a specified temperature, the lubricating oil on-off valve 19 and the fuel on-off are opened and closed. Since the valve 24 can be closed and a predetermined amount of the lubricating oil 11 and the light oil fuel 5 can be collected in the oil chamber 17 and the fuel chamber 22, the sufficiently high temperature lubricating oil 11 and the light oil fuel 5 suitable for viscosity measurement can be obtained. In addition, it is possible to avoid the possibility that the lubricating oil 11 at an extremely high temperature flows into the oil line 18 and damages the lubricating oil viscosity sensor 21 when climbing up.

  Further, even if the diesel engine 1 is stopped while the lubricating oil 11 is at a very high temperature during climbing or the like, and the diesel engine 1 is restarted immediately and the collection of the lubricating oil 11 is started, Since the lubricating oil 11 stored in the temporary storage chamber 20 can play a role of buffering heat, it is possible to avoid the possibility that the lubricating oil viscosity sensor 21 is exposed to the lubricating oil 11 having a very high temperature. can do.

  The quality determination system for the lubricating oil and light oil fuel according to the present invention is not limited to the above-described embodiments. The temperature detecting means for detecting the temperature of the lubricating oil in the oil chamber is a viscosity sensor for lubricating oil. In addition, the lubricating oil viscosity sensor and the fuel viscosity sensor may employ various methods such as a method using a surface acoustic wave, and do not depart from the gist of the present invention. Of course, various changes can be made within the range.

DESCRIPTION OF SYMBOLS 1 Diesel engine 5 Light oil fuel 11 Lubricating oil 12 Judgment unit 17 Oil chamber 18 Oil line 19 Lubricating oil on-off valve 20 Temporary storage chamber 21 Lubricating oil viscosity sensor 22 Fuel chamber 23 Fuel line 24 Fuel on-off valve 25 Fuel viscosity sensor 26 Communication line 27 On-off valve for mixing 28 Control device

Claims (4)

  A system for automatically determining the quality of a lubricating oil and light oil fuel used in a diesel engine by a determination unit mounted on the diesel engine, which is provided in the determination unit and can store a predetermined amount of lubricating oil A chamber, an oil line that guides part of the lubricating oil used in the diesel engine, passes through the upper part of the oil chamber, and then sends it out of the determination unit; and a flow path upstream of the oil chamber in the oil line. An on-off valve for lubricating oil that opens and closes, a viscosity sensor for lubricating oil that is provided in the oil chamber and measures the viscosity of the lubricating oil, and a fuel chamber that is provided in the determination unit and can store a predetermined amount of light oil fuel Then, a part of the light oil fuel used in the diesel engine is guided through the upper part of the fuel chamber and then the judgment unit. A fuel line that is sent out of the fuel line, a fuel on-off valve that opens and closes a flow path upstream of the fuel chamber in the fuel line, a fuel viscosity sensor that is provided in the fuel chamber and measures the viscosity of light oil fuel, The lubricating oil and light oil fuel is collected in the oil chamber and the fuel chamber by controlling the lubricating oil on-off valve and the fuel on-off valve during operation of the diesel engine, and after the diesel engine is stopped, the lubricating oil viscosity sensor and the fuel viscosity are collected. A system for determining the quality of a lubricating oil and light oil fuel, comprising: a controller for measuring the viscosity of the lubricating oil and light oil fuel collected by a sensor and determining the quality.   A fuel chamber is provided below the oil chamber in the determination unit, and the bottom of the oil chamber and the ceiling of the fuel chamber are connected by a communication line, and the opening and closing for mixing is opened and closed in the middle of the communication line. A valve is provided, and the mixing on-off valve is opened after the measurement of the viscosity of the lubricating oil and light oil fuel, and the lubricating oil in the oil chamber is dropped into the fuel chamber to mix with the light oil fuel, and the viscosity of the mixed oil is changed to the viscosity for fuel. The quality determination system for lubricating oil and light oil fuel according to claim 1, wherein the control device is configured to determine the degree of biofuel mixing by measuring with a sensor.   A temperature detecting means for detecting the temperature of the lubricating oil in the oil chamber is provided, and the lubricating oil temperature detected by the temperature detecting means is determined by opening the lubricating oil on-off valve and the fuel on-off valve immediately after starting the diesel engine. 3. The quality determination system for lubricating oil and light oil fuel according to claim 1, wherein the control device is configured to close the on-off valve for fuel oil and the on-off valve for fuel when the value reaches the value. Lubricants and quality determination system diesel fuel according to claim 3, characterized by providing a temporary reservoir chambers may store a predetermined amount of lubricating oil to the upstream side of the lubricant-off valve in the determination unit.

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