JPH0128274Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel cut system for an automobile engine.

In the event of a fire at an oil base, etc., it is necessary to emergency stop the engine to prevent an explosion caused by the engine. . Conventionally, in such cases, the engine was stopped by operating an engine stop button. However, if there is a strong need to stop the engine urgently, it is necessary to provide a fuel cut system to the engine to stop the engine urgently.

FIG. 2 is a perspective view of a conventional fuel cut system.

There is a V-shaped arm 2 ₁ connected at one end to a cable 1 ₁ leading to an accelerator pedal (not shown), and one end of a fixed return spring 3 ₁ is attached to the other end of the arm 2 ₁ . The other end of ₁ is fixed by fixing means ₄₁ .

One end of a shaft 5 ₁ (indicated by a broken line) is fixed to the top of the arm 2 ₁ . Arm 9 ₁ is its lower part 9 ₁ a
is fixed to the extension of the shaft 5 ₁ at . In addition,
The shaft 5 ₁ is rotatably supported by a fixed base 7 ₁ . A rod 22 ₁ is connected to the upper part of the arm 9 ₁ via a member 21 ₁ , and the rod 22 ₁ is connected via an air cylinder 16 ₁ having a cylinder rod 16 ₁ a on the opposite side of the connection with the arm 9 ₁ . It reaches the load lever of the injection pump (in the direction of arrow 23 ₁ ). With the above configuration, when the accelerator pedal is depressed, the arm 2 ₁ is pulled down by the cable 1 ₁ , and the arm 9 ₁ integrated with it via the shaft 5 ₁ rotates, and the rod 22 ₁
moves in the direction of arrow ₂₄₁ .

In the event of an emergency, the air cylinder 16 is activated by turning on the operating switch (not shown) for the air cylinder 16 ₁ located in the driver's seat, opening the air valve (not shown), and operating the air cylinder 16 ₁ . Cylinder rod _161a of _{No. 1} moves in the direction of arrow ₂₃₁ to move the load lever of the injection pump to the stop position.

The conventional fuel cut system mentioned above is
Since a heavy air cylinder is installed in the middle of the rod leading to the load lever of the injection pump, [1] The inertial mass of the system is large, and the link movement is slow, making it difficult for fuel cut to occur even when the accelerator is released. [2] In addition, if the air cylinder breaks down, there is a disadvantage that the operation after the air cylinder becomes impossible, making it impossible to perform a fuel cut.

In this invention, the link system is equipped with a cancel mechanism that includes a tension spring and a first lever, and the air cylinder that interlocks with the link system is installed outside the link system, thereby preventing the inertia mass of the link system from increasing. An object of the present invention is to provide a fuel cut system that can reliably perform a fuel cut by manually moving a rod leading to a load lever even when an air cylinder breaks down.

Next, the present invention will be described by way of examples with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the fuel cut system of the present invention, in which there is a V-shaped first arm 2 connected at one end to a cable 1 leading to an accelerator pedal (not shown). , a fixed return spring 3 is attached to the other end of the first arm 2.
One end of the return spring 3 is engaged, and the other end of the return spring 3 is fixed by a fixing means 4. One end of a shaft 5 (indicated by a broken line) is fixed to the top of the V-shaped first arm 2, and a second arm 6 is fixed to the other end of the shaft 5.
The shaft 5 is rotatably supported by a fixed base 7. The second arm 6 has a twisted shape at the middle part, and a bar 8 is attached to the opposite side 6a of the part where it is fixed to the shaft 5.

On the other hand, a third arm is placed at a distance near the second arm 6.
The third arm 9 is rotatably supported by an extension of the shaft 5 at its lower portion 9a. Therefore, even if the shaft 5 rotates, the third arm 9
It is not directly rotated by. A connecting rod 11 is attached to the approximate center of the third arm 9 via a support 10, and a first lever 1 is attached to the tip of the connecting rod 11.
2 is fixed. A long hole 13 extending parallel to the moving direction of the connecting rod 11 is bored in the first lever 12 .

Further, a second lever 15 is provided which is rotatably supported at the center by a support part 14 arranged at a fixed position, and one end part 15b of the second lever 15 is inserted into the elongated hole 13 in the direction of movement of the rod 22. It is connected to the first lever 12 via a movably engaged pin 17, while the other end 15a is connected to the cylinder rod 16a of the air cylinder 16.
The lever 15 is rotated by movement of the cylinder rod 16a.

On the other hand, a stopper 18 is fixed to the third arm 9, and the stopper 18 is arranged so that when the accelerator pedal is released, the second arm 6 moves the third arm 9 to the idle position. Also the third
A protruding member 19 is fixed to the arm 9, and a tension spring 20 is installed between the protruding member 19 and the bar 8 of the second arm 6, so that the second arm 6 and the third arm 9 are connected. There is. Further, a rod 22 is connected to the upper part of the third arm 9 via a member 21, and the rod 22 reaches a load lever (in the direction of arrow 23) of the injection pump on the opposite side of the connection with the third arm 9.

Next, the operation of the present invention will be explained with reference to FIG.

First, normal operation will be explained. When the accelerator pedal is depressed, the first arm 2 is pulled down by the cable 1, the second arm 6 integrated with it via the shaft 5 moves, and the second arm 6 is moved down via the bar 8, the tension spring 20, and the projection member 19. Pull arm 9 in the direction of arrow 24. When the accelerator pedal is released, the stopper 1 is fixed to the third arm 9.
8, the second arm 6 moves the third arm 9 to the idle position. During normal driving, the movement of the third arm 9 causes the rod 22 to adjust the injection pump, and at the same time the first lever 12
It moves from full to stop with arm 9, but the second
The lever 15 is not operated due to the elongated hole 13 of the first lever 12.

Next, the operation in an emergency will be described. When a switch (not shown) for operating the air cylinder 16 installed in the driver's seat is turned on, an air valve (not shown) opens and the air cylinder 16 is activated. The cylinder rod 16a of the air cylinder 16 is indicated by the arrow 25.
, and rotate the second lever 15 to move the first
The lever 12 is pulled and the load lever of the injection pump is moved via the connecting rod 11 and the third arm 9 via the rod 22 to the stop position. This action cuts the fuel. In addition,
At this time, the third arm 9 is a tension spring 20.
It operates by overcoming the elastic force of

In this way, in this embodiment, the engine control link system is provided with a cancel mechanism including the tension spring 20 and the first lever 12, and the air cylinder 16 that interlocks with the link system is provided outside the link system, thereby reducing air pressure. The fuel can be easily cut by simply supplying air to the cylinder 16, and since the inertial mass of the link system does not increase, the link system does not operate sluggishly, and even if the air cylinder 16 fails, the load lever By moving the rod 22 by hand,
Fuel cut can be carried out reliably.

As explained above, the present invention provides a cancel mechanism including a tension spring and a first lever in the link system of the engine control, and provides an air cylinder that interlocks with the link system outside the link system. You can easily cut the fuel just by supplying it, and
Since the inertial mass of the link system does not become large, the operation of the link system is not slow, and even if the air cylinder breaks down, fuel cut can be reliably performed by manually moving the rod leading to the load lever.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the fuel cut system of the present invention, and FIG. 2 is a perspective view of a conventional example. 1... Cable, 2... First arm, 3... Return spring, 5... Shaft, 6... Second arm, 9... Third arm, 12... First lever, 1
3...Elongated hole, 15...Second lever, 16...Air cylinder, 18...Stopper, 20...Tension spring, 22...Rod.

Claims (1)

[Scope of utility model registration request] A first arm 2 connected to a cable 1 leading to an accelerator pedal, a second arm 6 integrally connected to the first arm 2 and rotatable, and connected to the second arm 6 by a tension spring 20. a rotatable third arm 9; a rod 22 connected to the third arm 9 and leading to the load lever of the injection pump; and a rod 22 fixed to the third arm 9 and connecting the third arm 9 to the second arm 6 A stopper 18 that follows the movement, and a long hole 1 that is attached to the third arm 9 via a connecting rod 11 and extends in the direction of movement of the connecting rod 11.
3, and one end 15b is connected to the first lever 1 through a pin 17 that is engaged with the elongated hole 13 so as to be movable in the moving direction of the rod 22.
A second lever 15 is attached to the second lever 15 and is rotatable about the central part as a fulcrum; and the other end 15 of the second lever 15.
by the cylinder rod 16a engaged with the second
and an air cylinder 16 for rotating the lever 15. By operating the air cylinder 16, the elastic force of the tension spring 20 is overcome and the injection pump is activated via the third arm 9 and the rod 22. A fuel cut system characterized by moving the load lever to the stop position.