JPS6131868Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a control device for a tank car for transporting powder and granular materials.

Recently, some of the cylinders of engines installed in vehicles are used as air compressors by cutting off the fuel supply with fuel stop valves, and introducing the pressurized air into the tank to flow the powder and granules in the tank. Tank cars for transporting powder and granular materials have been adopted.

However, since the engine installed in this type of tank car is a four-cycle engine, when operated as an air compressor, pressurized air is pumped out only once every two rotations of the engine, making it extremely inefficient.

This invention was devised with the aim of increasing the generation of pressurized air into the tank, focusing on the above points.The gist of this invention is to stop the fuel supply to some cylinders of the engine, In a tank car for transporting powder and granular material that can fluidize and discharge powder and granular material in the tank using pressurized air, the valve mechanism of the one cylinder is configured with a 4-cycle valve mechanism and a 2-cycle valve mechanism, and the fuel There is a control device for a tank car for transporting powder and granular materials, characterized in that when the tank car is stopped, one of the cylinders is operated by a two-cycle valve mechanism, and one embodiment thereof will be described below with reference to the drawings.

1 is a V-type diesel engine mounted on a tank car for transporting powder and granular materials, and has multiple cylinders, such as a left bang 2 including cylinders #1, 3, 5, and 7, and a right bang including cylinders #2, 4, 6, and 8. Each bank 2 and 3 is connected to an exhaust passage 4 and 5, respectively.

6 is an exhaust brake valve that also serves as an exhaust opening/closing valve, and 7 is a normal exhaust brake valve, which is disposed in the middle of the exhaust passages 4 and 5 so as to be openable and closable, and each operating valve mechanism (not shown) is connected to the air tank 8. They are connected by an air passage 9 and air passages 10 and 11 branched from it.

12 and 13 are normally closed type solenoid valves, and the above air path 1
0 and 11, the air passage is normally closed and opened 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. Reference numeral 19 denotes a normally open fuel stop electromagnetic valve, which is installed in one of the oil passages 16 and 17, for example, in the middle of the oil passage 16 connected to the injection pump 14;
The oil passage 16 is closed only when electricity is applied.

Further, a branch passage 20 is connected to the exhaust passage 4 of the bank 2 on the side where the electromagnetic valve 19 for closing the oil passage 16 is disposed, forward of the position where the exhaust brake valve 6 is disposed, that is, on the engine side. The branching path 20 is configured to be openable and closable by a normally closed solenoid valve 21, and the powder and granule material is transported through filters 22, 23, one-way valve 24, and an on-off valve 25 that is opened and closed by appropriate means. It is connected to the bottom 26a of the transport 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.

Further, the tank 26 has a filter 31 with a built-in inlet 30 for introducing powder and granular material, an air vent duct 32 connected thereto, and an outlet 3 of the duct 32, as is well known.
An on-off valve 33 and the like for opening and closing the duct 32 is provided near 2a.

On the other hand, 34 is an exhaust brake circuit, which is connected to a battery 35 via a key switch 36.
It includes an exhaust brake switch 37, an accelerator switch 38 that operates in conjunction with an accelerator pedal, a clutch switch 39 that operates in conjunction with a clutch pedal, and the like, and is connected to the solenoid valve 12 through the solenoid valve 13 and diode 40, respectively.

Reference numeral 41 denotes a powder discharge operation circuit, which includes a discharge operation switch 42 and the like, is connected to the solenoid valve 12 via a diode 43, and is connected to the solenoid valve 19 via a branch line 44, and also to the branch line 45. The solenoid valve 21 and the valve train switching solenoid valve 46 are respectively connected through the solenoid valve 21 and the solenoid valve 46 for switching the valve mechanism.

The solenoid valve 46 for switching the valve mechanism operates the intake/exhaust valves (not shown) of cylinders #1, 3, 5, and 7 of the left bank 2, which are used as air compressors when fuel is stopped. A lubricating oil line 49 is selectively provided in the left and right oil chambers of the hydraulic cylinder 48 formed at the shaft end of the camshaft 47 and divided into two by the piston portion 47a.
It has been adapted to supply oil from

The lubricating oil line 49 supplies oil from an oil pan 51 to an oil filter 5 by an oil pump 52.
3 to each lubricating section and cooling section L, and 54 is a check valve provided between the system line 49 and the oil line 50.

Further, cams 55 and 56 for intake and exhaust valves are provided on the camshaft 47, and each cam 55, 5
6 is a 4-cycle cam profile 55a, 56a
and 2-cycle cam profiles 55b and 56b. By sliding the camshaft 47 in the axial direction, the cam profiles in contact with the intake and exhaust push rods 57 and 58 are switched, and the intake and exhaust valves are operated respectively. It is configured to be able to selectively operate between 4 cycles and 2 cycles.

Note that 2a is a support wall for the camshaft 47 of the bank 2, and 2b is a bearing.

Furthermore, indicator lights may be provided in each of the two circuits 34 and 41 as required.

In the present embodiment configured as described above, when discharging the powder or granular material in the tank 26, when the discharge operation switch 42 is closed and the powder or granule discharge operation circuit 41 is closed, the current is passed from the battery 35 as described above. It flows through the switch 42 to the solenoid valves 12, 19, and 21, respectively. Therefore, the solenoid valve 19 is closed, so
Since the oil supply from the oil passage 16 to the injection pump 14 is cut off, the pump 14 enters a non-injection state and stops supplying fuel to each cylinder #1, 3, 5, and 7 of the left bank 2. At the same time, the solenoid valve 46 operates, switching the internal oil passage to the hydraulic cylinder 4.
Since oil is supplied to the right chamber of No. 8, the camshaft 47 is
As shown in the figure, the 4-cycle cam profile 55a,
2-cycle cam profile 55b from 56a,
56b, the cylinders #1, 3, 5, and 7 of the left bank 2 operate as a two-cycle air compressor.

On the other hand, the electromagnetic valve 12 also operates and opens its air passage, so compressed air from the air tank 8 flows through the air passages 9 and 10 to the operating mechanism of the exhaust brake valve 6, and the valve 6 is closed. Furthermore, since the exhaust path 4 and the branch path 20 are brought into communication by the opening operation of the solenoid valve 21, each cylinder #1, #3, and #1 of the left bank 2 efficiently functions as a two-cycle compressor that simply pressurizes intake air. The compressed air from 5 and 7 is not exhausted outward from the exhaust path 4, but is fed to the branch path 20 side. Here, when the on-off valve 25 is opened, the pressurized 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 and granules in the tank 26 are fluidized by the pressurized air from below the air slide belt 27, and when the on-off valve 29 is opened, the powder and granules fluidized as described above are The body is discharged outward through the duct 28.

If you want to operate the exhaust brake while the vehicle is running, close the exhaust brake switch 37 and close the exhaust brake circuit 34, and the current will flow from the battery 35 to the exhaust brake switch 37, accelerator switch 38, and clutch switch 39. Through the solenoid valve 13 and the diode 40 through the solenoid valve 12
Since the exhaust gas flows into the exhaust brake valves 7 and 6, the solenoid valves 13 and 12 are opened, and the 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 adopted 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.

As described above, in the present invention, one cylinder group of the engine is operated as a 4-cycle cylinder during normal operation, and when the fuel supply is stopped and the cylinder group is operated as an air compressor, it is operated as a 2-cycle compressor. Therefore, it is possible to provide a tank car for transporting powder and granular materials with a significantly improved pressurized air production rate compared to conventional tank cars.

In addition, one cylinder of the engine is made to function as a compressor, and the pressurized air is used to discharge powder and granules, so there is no need to install a new air compressor, and the number of parts is reduced. This has the effect of providing an inexpensive powder discharge device.

Furthermore, since there is no noise generated during operation of the air compressor, there is an advantage that an extremely quiet powder discharge device can be provided.

In addition, an exhaust brake valve can be used to close the exhaust path of the cylinder group that acts as a pressurized air compressor, eliminating the need for a new closing valve and its related parts, eliminating the need for the air compressor mentioned above. Combined, this has the effect of providing a tank car for transporting powder and granular materials that has a small number of parts, is inexpensive, and is suitable for mass production.

[Brief explanation of the drawing]

Fig. 1 is a schematic system diagram showing an embodiment of the present invention, Fig. 2 is an operational system diagram of the camshaft in the same embodiment, and Figs. FIG. 3 is a side view showing a 4-cycle cam profile and a 2-cycle cam profile. 1... Diesel engine, 2... Left bank (including #1, 3, 5, 7), 4... Exhaust path, 6...
...Exhaust brake valve, 12, 13...Solenoid valve, 19
...Solenoid valve for fuel stop, 20... Branch road, 21...
... Solenoid valve, 25 ... Opening/closing valve, 26 ... Tank, 2
8...Duct for discharging powder and granular material, 35...Battery,
41... Powder discharge operation circuit, 42... Discharge operation switch, 46... Valve mechanism switching solenoid valve, 4
7...Camshaft, 48...Hydraulic cylinder, 55...
Intake valve cam (55a...4-cycle cam profile, 56b...2-cycle profile), 5
6...Exhaust valve cam (56a...cam profile for 4 cycles, 56b...cam profile for 2 cycles).

Claims (1)

[Scope of utility model registration request] In a tank car for transporting powder and granular materials, the fuel supply to one cylinder of the engine is stopped and the pressurized air is used to fluidize and discharge the powder and granular material in the tank. 1. A control device for a tank car for transporting powder and granular materials, characterized in that the cylinder is constructed of a four-cycle cylinder and a two-cycle cylinder, and when fuel is stopped, a two-cycle valve mechanism operates the first cylinder.