JPS6238175B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tank car for transporting powder and granular materials equipped with an exhaust brake valve for vehicle deceleration.

Modern tank cars for transporting powder and granules use engine-driven air compressors installed in the vehicle to discharge powder and granules such as powdered cement, sugar, and flour stored in the tank to the outside of the tank. A method has been adopted in which powder and granules are fluidized and discharged using air.

However, in this type of tank car for transporting powder and granular materials, engine noise and air compressor noise combine to generate significant noise when discharging powder and granular materials. It is necessary to install a power extraction device to drive the vehicle and accessories related to these devices on the vehicle, which causes problems such as a large number of parts, an increase in vehicle weight, and a restriction on the size of the tank. It had drawbacks such as being expensive.

The SAE paper 660741 “Combination Diesel Engine Air Compressor” is a tank truck for transporting powder and granular materials that eliminates these problems and shortcomings.
"Dual Diesel".

However, the exhaust shutoff valve in the tank car for transporting powder and granular material described in the above document is not only provided on the exhaust path side of the cylinder group where the fuel cutoff valve of the engine is located, but it is also clear from the circuit diagram in FIG. This is a flow path switching valve that is used only when supplying compressed air to the powder tank side in conjunction with the parking brake when the vehicle is stopped. Its function is different from the so-called exhaust brake valve for vehicle deceleration, which decelerates the vehicle with the braking force obtained by trapping exhaust gas in the exhaust passage and increasing the exhaust pressure. No consideration has been given to the dual use of .

Therefore, when the tank car for transporting powder and granular material in the above-mentioned document is equipped with an exhaust brake device for decelerating the vehicle, in addition to the exhaust shutoff valve and its control device, the exhaust brake valve for vehicle deceleration and its control device are installed. It is necessary to provide a separate

In addition, in the tank car for transporting powder and granular materials described in the above-mentioned literature, the branch passage for supplying compressed air is not provided with an on-off valve, so the coupling of the powder and granular material is attached to the end of the branch passage. This is done after removing the removed valve cap, and when the engine cylinder is used as an air compressor for the powder tank, additional manual work is required and the handling is inconvenient. It has disadvantages such as:

Moreover, since the tank car is not equipped with an on-off valve on the branch path that supplies compressed air, when discharging powder and granules, the piping must be switched manually as described above, so the exhaust path must be switched manually. The distance from the branching point to the branching path to the piping switching site is inevitably large, and exhaust gas from traveling enters the piping in this area, causing fuel carbide, etc. in the exhaust gas to accumulate in this area. As a result, there is a risk that the powder may be blown away by the compressed air during pressure feeding, mix with the loaded powder or granule, and contaminate the powder or granule.

Furthermore, Utility Model Application Publication No. 1987-40941 and Utility Model Application Publication No. 1987-
Publication No. 84629 describes a warm-up promotion device for a direct injection internal combustion engine equipped with an exhaust brake valve device, but it does not take into account tank cars for transporting powder and granular materials, so the above-mentioned problems cannot be solved. cannot be resolved.

The present invention was invented in view of the above-mentioned problems, and its purpose is to provide an air compressor for supplying compressed air to a powder tank by using a group of cylinders equipped with a fuel stop device in an engine. Exhaust brake for vehicle deceleration, when used as a vehicle, to decelerate the vehicle using the exhaust braking force obtained by trapping exhaust gas from the cylinder in the exhaust path and increasing the exhaust pressure while the vehicle is running. By making the valve also serve as a control valve for controlling the discharge of powder and granular material from the powder tank, the equipment and parts for controlling the discharge of powder and granule can be simplified, and the on-off valve can be By providing the branch near the branch part of the branch, exhaust gas enters the branch, fuel carbide, etc. in the exhaust gas accumulates, and when compressed air is supplied, it is blown away by the compressed air and becomes the powder. It is designed to prevent air from entering the powder and granules loaded in the granule tank and contaminating the particles, and to close the exhaust brake valve for vehicle deceleration when discharging the powder and granules. A powder discharge operation circuit is provided that controls opening of an on-off valve provided in a branch path connecting the exhaust path of a group of cylinders that operate as a compressor to a tank for powder and granule. In addition to making it easier to discharge powder and granules from the tank, the exhaust brake valve (closing valve),
To provide a tank car for transporting powder and granular materials equipped with an exhaust brake device for vehicle deceleration, which eliminates the need to operate the on-off valves individually or manually remove the cap as in the previous example, and also prevents work errors. It is about providing.

The gist of this is that an exhaust brake valve for vehicle deceleration is provided in each exhaust path of some of the cylinder groups that operate as an air compressor equipped with a fuel stop device in the engine, and of other cylinder groups, and A normally-closed on-off valve is provided near the branching point of the branch path connecting the exhaust path on the engine side of the exhaust brake valve for vehicle deceleration belonging to the cylinder group to the tank for powder and granular material, and a normally closed on-off valve is provided near the branch point of the branch path that connects the exhaust path on the engine side of the exhaust brake valve for vehicle deceleration belonging to the cylinder group of cylinders. a particulate matter discharge operation circuit that operates the fuel stop device and controls the opening/closing valve to open in conjunction with closing the vehicle deceleration exhaust brake valve belonging to the some cylinder groups. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention, which is a tank car for transporting powder and granular materials equipped with an exhaust brake device for vehicle deceleration, will be described below with reference to the drawings.

Reference numeral 1 is a V-type diesel engine having two banks mounted on a tank car for transporting powder and granular materials, and has a plurality of cylinders, such as left bank 2 including cylinders #1, 3, 5, and 7, and cylinders #2, 4, and 6. , 8, and each bank 2, 3 is connected to an exhaust passage 4, 5, respectively.

6 and 7 are exhaust brake valves for vehicle deceleration of the exhaust brake device for vehicle deceleration, and when the vehicle is running, the exhaust gas from each cylinder is confined in the exhaust passages 4 and 5 and the exhaust gas is exhausted by increasing the exhaust pressure. It obtains braking force, and is disposed in the middle of the exhaust passages 4 and 5 so as to be openable and closable, and each operating valve mechanism is connected to the air tank 8 via the air passage 9 and air passages 10 and 11 branched from it. has been done. 12,1
Reference numeral 3 denotes a solenoid valve, which is disposed midway between the air passages 10 and 11, and normally closes the air passage and opens the passage only when energized.

14 and 15 are two interlocked fuel injection pumps, which are arranged between the two banks 2 and 3,
Fuel is injected and supplied to each cylinder #1 to #8 of each corresponding bank, and 16 and 17 are oil passages that connect the injection pumps 14 and 15 to a fuel tank 18.
The fuel for each tank is branched and sent to each tank.

19 is a fuel stop electromagnetic valve as a fuel stop device, and one of the oil passages 16 and 17,
For example, it is provided in the middle of the oil passage 16 connected to the injection pump 14, and the oil passage 16 is closed only when electricity is applied. Also,
In the exhaust passage 4 of the bank 2 on the side where the fuel stop electromagnetic valve 19 for closing the oil passage 16 is disposed, a branch passage 20 is provided in front of the position where the vehicle deceleration exhaust brake valve 6 is disposed, that is, on the engine side. In addition, a normally closed electromagnetic valve 21 is provided near the branch from the exhaust path 4 of the branch path 20 so that it can be opened and closed. It is connected to the bottom 26a of the tank 26.

27 is an air slide belt provided near the bottom of the tank 26, and 28 is a powder discharge duct which extends outside the tank 26 and can be opened and closed by an appropriate means near its discharge port 28a. An on-off valve 29 is provided.

Furthermore, the tank 26 is provided with an inlet 30 for introducing powder and granular material, a built-in filter 31 and an air vent duct 32 connected thereto, and an on-off valve 33 located near the outlet 32a of the duct 32 for opening and closing the duct 32, as is well known. etc. are provided.

On the other hand, 34 is a circuit for operating the exhaust brake for decelerating the vehicle of the exhaust brake device for decelerating the vehicle, which is connected to the battery 35 via the key switch 36.
The solenoid valve 12 includes an exhaust brake switch 37, an accelerator switch 38 that operates in conjunction with an accelerator pedal, and a clutch switch 39 that operates in conjunction with a clutch pedal.
are connected to each other.

Reference numeral 41 denotes a powder discharge operation circuit, which includes a discharge operation switch 42 and is connected to the electromagnetic valve 12 via a diode 43, and connected to the electromagnetic valve 19 via a branch line 44, and via a branch line 45. and are connected to the solenoid valves 21, respectively.

Each of the two circuits 34 and 41 may be provided with an indicator lamp if necessary.

In the powder and granular material transport tank car of the present invention configured as described above, when discharging the powder and granular material in the tank 26, the discharge operation switch 42 is closed and the powder and granular material discharge operation circuit 41 is closed. The current is supplied from the battery 35 to the solenoid valve 1 via the switch 42.
2, 19, and 21, respectively.

Therefore, the electromagnetic valve 19 is closed, and the oil supply from the oil passage 16 to the injection pump 14 is cut off, so the pump 14 becomes in a non-injection state, and each cylinder #1, 3, 5, 7 of the left bank 2 Stop fuel supply to. At the same time, the solenoid valve 12 operates and opens its air passage, so compressed air from the air tank 8 passes through the air passages 9 and 10 to the exhaust brake valve 6.
and the valve 6 is closed.

Furthermore, the opening operation of the solenoid valve 21 brings the exhaust passage 4 and the branch passage 20 into communication, so that the left bank 2 acts as an air compressor that simply compresses intake air.
The compressed air from each cylinder #1, 3, 5, and 7 is sent to the branch path 20 side without being exhausted outward from the exhaust path 4.

Here, the compressed air is introduced into the bottom 26a of the tank 26 via the filters 22, 23 and the one-way valve 24.

Therefore, the powder in the tank 26 is fluidized by the compressed air from below the air slide belt 27, and when the on-off valve 29 is opened, the fluidized powder is transferred to the duct 28. Excreted outward.

Furthermore, since the solenoid valve 21, which is closed when not discharging the powder or granular material, prevents the exhaust gas from entering the branch path 20, the cargo of granular material may be damaged by fuel carbide or the like in the exhaust gas. Never.

If you want to operate the exhaust brake while the vehicle is running, close the exhaust brake switch 37 and close the vehicle deceleration exhaust brake activation circuit 34, and the current will flow from the battery 35 to the exhaust brake switch 37 and the accelerator. Since the fluid flows through the switch 38 and the clutch switch 39 to the solenoid valve 12 via the solenoid valve 13 and the diode 40, the solenoid valves 13 and 12 are opened, so that the vehicle deceleration exhaust brake valves 7 and 6 are closed. At this time, since the diode 43 prevents the electromagnetic valves 19 and 21 from being energized, the electromagnetic valves 19 and 21 do not operate, so there is no problem with the exhaust brake operation.

Further, in this embodiment, a fuel cut system using the electromagnetic valve 19 is employed for each cylinder of the left bank 2, but the same effect can be achieved by changing the configuration of the plunger of the injection pump.

Further, in the above-described embodiments, an example of a V-type engine has been described, but it goes without saying that the same effects can be obtained even if an in-line multi-cylinder engine is employed.

As described above, the powder and granular material transport tank car equipped with the exhaust brake for vehicle deceleration according to the present invention has some of the cylinder groups that operate as an air compressor equipped with a fuel stop device in the engine, and each of the other cylinder groups. An exhaust brake valve for vehicle deceleration is provided in each of the exhaust passages, and the exhaust brake valve for vehicle deceleration belonging to some of the cylinder groups is always located near the branching part of the branch passage connecting the exhaust passage on the engine side to the tank for powder and granular material. A closed type opening/closing valve is provided, and the fuel stop device is operated when the powder and granules are discharged from the tank, and the opening/closing valve is operated in conjunction with closing the vehicle deceleration exhaust brake valve belonging to the some cylinder groups. Since a powder discharge operation circuit is provided to control the opening of the valve, the following effects can be obtained.

First, exhaust brake valves for vehicle deceleration were installed in the exhaust passages of some cylinder groups that operate as air compressors equipped with a fuel stop device in the engine, and of other cylinder groups. When the vehicle is running, the exhaust brake valves for decelerating the vehicle in each of the exhaust passages are activated simultaneously, and a strong exhaust braking force for decelerating the vehicle can be obtained. A vehicle deceleration exhaust brake valve belonging to the partial cylinder group is operated together with the fuel stop device, and the compressed air obtained in the partial cylinder group is supplied into the powder tank through the branch path. can do.

That is, by making the vehicle deceleration exhaust brake valve belonging to some of the cylinder groups equipped with the fuel stop device also serve as the particulate material discharge control valve, the devices and parts for controlling the particulate matter discharge are simplified. There is an effect that can be done.

In addition, since the on-off valve is provided near the branch of the branch path that connects to the powder tank from the exhaust path on the side of the vehicle deceleration exhaust brake valve that belongs to some of the cylinder groups, the vehicle deceleration exhaust Exhaust gas is prevented from entering the branch passage when it operates as a brake valve, and fuel carbide in the exhaust gas accumulates in the branch passage due to the intrusion of exhaust gas, which is compressed when compressed air is supplied. This has the effect of preventing the particles from being blown away by the air and mixed into the particles loaded in the powder tank and contaminating the particles.

Furthermore, the fuel stop device is activated when the powder and granular material is discharged from the tank, and the opening/closing valve is controlled to be opened in conjunction with closing of the vehicle deceleration exhaust brake valve belonging to the part of the cylinder group. Since a powder discharge operation circuit is provided, it is possible to easily discharge powder and granules during powder discharge work, and the exhaust brake valve (closing valve) and normally closed open/close valve can be individually operated. This eliminates the need to manually remove the cap, and also prevents work errors.

[Brief explanation of the drawing]

The figure is a schematic system diagram showing an embodiment of the present invention. 1... Diesel engine, 2... Left bank (including #1, 3, 5, 7), 4... Exhaust path, 6, 7
...Exhaust brake valve for vehicle deceleration, 12, 13... Solenoid valve, 19... Solenoid valve for fuel stop, 20... Branch path, 2
DESCRIPTION OF SYMBOLS 1... Solenoid valve, 26... Tank for powder and granular material, 28... Duct for discharging powder and granular material, 34... Circuit for operating exhaust brake for vehicle deceleration, 35... Battery, 41... Circuit for operating powder and granular material discharge, 42... Discharge operation switch.

Claims (1)

[Claims] 1 Vehicles belonging to some of the cylinder groups are provided with vehicle deceleration exhaust brake valves in the respective exhaust passages of some of the cylinder groups that operate as air compressors equipped with a fuel stop device in the engine and other cylinder groups. A normally closed on-off valve is provided near a branching point of a branching path connecting an engine-side exhaust path of a deceleration exhaust brake valve to a powder tank, and the fuel stop device is activated when powder and granules are discharged from the tank. A vehicle deceleration exhaust brake device comprising: a particulate material discharge operation circuit that operates and controls the opening/closing valve to open in conjunction with closing the vehicle deceleration exhaust brake valve belonging to some of the cylinder groups; A tank car for transporting powder and granular materials.