JP2525469Y2 - Traction control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a traction control device for preventing a slip of a driving wheel during acceleration of a vehicle.

[Prior Art] As shown in FIG. 2, one end of an accelerator cable 2 is connected to an accelerator pedal 1 of this type of traction control device, and the other end is connected to a control lever of a fuel injection pump 3 via a link mechanism 6. 4 is connected. The link mechanism 6 is provided with an actuator 7 composed of an air cylinder that moves the lever 4 in a direction to reduce the injection amount of the pump 3 when activated.

The conventional link mechanism 6 includes a link 6a, a stay 6b, and a return spring 6c. The other end of the cable 2 is connected to the distal end of the link 6a, and its proximal end is pivotally connected to the engine body. The link 6a is returned by the spring 6c.
One end of the stay 6b is pivotally supported at the upper center of the link 6a, and the other end is attached to the actuator 7. The lever 4 is connected to the tip of the piston rod 7a of the actuator 7. The actuator 7 is connected to the air tank 10 via the switching valve 9.
And the switching valve 9 is switched by a control signal of the controller 5. The switching signal of the switching valve 9 is sent from the controller 5 when the detection speed of the drive wheel rotation sensor 8a is higher than the detection speed of the driven wheel rotation sensor 8b by more than a specified value.

In the conventional device, when the pedal 1 is depressed to accelerate the vehicle, the lever 4 is moved to the position shown by the solid line via the cable 2, the link 6a, the stay 6b, the actuator 7, and the rod 7a, and the injection of the pump 3 is performed. Increase volume. When the rotation speed of the engine increases and the rotation speed of the drive wheels increases, the road surface is in a snow-covered state or frozen state, the drive wheels slip, and the rotation speed of the drive wheels is higher than that of the driven wheels. Then, a switching signal of the switching valve 9 is transmitted from the controller 5, and the actuator 7 is operated by the compressed air in the tank 10.

As a result, the rod 7a moves in the direction of the dashed arrow, and the lever 4 moves to the position indicated by the two-dot chain line, so that the injection amount of the pump 3 is reduced and the slip of the drive wheels can be prevented.

[Problem to be Solved by the Invention] However, in the above device, since the actuator is provided between the link mechanism and the control lever without being fixed to the engine main body, the control lever is moved by the inertia force of the actuator itself during braking of the vehicle. It is easy to move in the direction to increase the injection amount.

If the spring constant of the return spring is increased to prevent this point, there is a problem in operability such that the depression force of the accelerator pedal must be increased.

An object of the present invention is to prevent the slip of the driving wheels during acceleration of the vehicle, to positively reduce the rotational speed of the engine by the inertia force acting on the second link when the vehicle is suddenly braked, and to further depress the accelerator pedal. It is to provide a traction control device which does not increase the traction control.

[Means for Solving the Problems] The configuration of the present invention for achieving the above object will be described based on FIG. 1 corresponding to the embodiment.

The present invention relates to an accelerator cable 12 having one end connected to an accelerator pedal 11 of a vehicle and the other end connected to a control lever 14 of a fuel injection pump 13 via a link mechanism 16, and rotation of drive wheels provided on the link mechanism 16. It is an improvement of the traction control device including an actuator 17 for moving the control lever 14 in a direction to decrease the injection amount of the pump 13 when the speed becomes higher than the rotation speed of the driven wheel by more than a specified value.

The characteristic structure is that the link mechanism 16 includes first and second links 16a and 16b, the actuator 17 is fixed to the engine body, the accelerator cable 12 is connected to one end of the first link 16a, and the center of the first link 16a is Alternatively, the piston rod 17a of the actuator 17 is pivotally supported at the other end, and the other end or the center of the second link 16b is connected to the other end or the center of the first link 16a, and is controlled by the inertial force acting on the second link 16b during braking of the vehicle. The other end of the second link 16b is connected to the control lever 14 so that the lever 14 rotates in a direction to decrease the injection amount of the pump 13.

[Operation] If a difference in rotation speed occurs between the drive wheel and the guide wheel during acceleration, the actuator 17 projects the piston rod 17a, and the control lever 14 controls the first and second links 16a, 16a.
It rotates in a direction to decrease the fuel injection amount via 16b.

Further, at the time of sudden braking, the control lever 14 rotates in a direction to decrease the fuel injection amount due to the inertial force acting on the second link 16b.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, one end of an accelerator cable 12 is connected to an accelerator pedal 11 of the traction control device, and the other end of the cable 12 is connected to a control lever 14 of a fuel injection pump 13 via a link mechanism 16. You. The link mechanism 16 is provided with an actuator 17.

The link mechanism 16 includes a first link 16a and a second link 16b. One end of the first link 16a is connected to the other end of the cable 12, and the other end of the link 16a is connected to one end of a second link 16b. . The other end of the link 16b is connected to the lever 14.
The pump 13 is attached to an engine body (not shown),
A governor 18 for adjusting a moving amount of a control rack (not shown) is attached to the pump 13. Lever 14 is governor 18
To one end of the rack.

In this example, the actuator 17 is a single-acting air cylinder. The actuator 17 is fixed to the engine body 15, and the center of a link 16a is pivotally supported at the tip of a piston rod 17a of the actuator 17. When the actuator 17 operates, the rod 17a moves in the direction of the dashed arrow, and the lever 1
4 is configured to move in a direction to decrease the injection amount of the pump 13.

A drive wheel (not shown) is provided with a rotation sensor 21 for detecting the rotation speed of the drive wheel, and a drive wheel (not shown) is provided with a rotation sensor 22 for detecting the rotation speed of the driven wheel. The detection outputs of both sensors 21 and 22 are connected to a control input of a controller 23, and a switching valve 24 is connected to the control output of the controller 23. The air tank 26 is connected to the port 24a of the switching valve 24.
The actuator 17 is connected to the port 24b, and the port 24c communicates with the atmosphere. When the switching valve 24 is turned on, the ports 24a and 24b communicate with each other.
It is configured such that b communicates with the port 24c.

The operation of the traction control device thus configured will be described.

When the accelerator pedal 11 is depressed in the direction of the solid arrow in order to accelerate the vehicle, the cable 12, the first link 16a and the second link 16b move in the direction of the solid arrow, and the control lever 14 is moved to the position indicated by the solid line. That is, the pump 13 is moved in a direction to increase the injection amount. As a result, the rotation speed of the engine increases, and the rotation speed of the drive wheels increases. At this time, when the road surface is in a snow-covered state or a frozen state, the rotation speed of the driving wheel is higher than that of the driven wheel, and when the driving wheel slips, the controller 23 controls the switching valve 24 based on the detection signals of the rotation sensors 21 and 22. When turned on, the compressed air in the air tank 26 flows into the actuator to move the piston rod 17a in the direction of the dashed arrow.

As a result, the rod 17a moves the lever 14 through the links 16a and 16b to the position shown by the two-dot chain line, that is, the direction in which the injection amount is reduced, while keeping the position of the cable 12 as it is. And the slip of the drive wheels can be prevented. When the rotation speed of the drive wheel becomes equal to the rotation speed of the driven wheel, the controller 23 returns the rod 17a to the position shown by the solid line based on the detection signals, and moves the lever 14 to the position shown by the solid line. The pump 13 injects fuel into the engine according to the amount of depression of the pedal 11, and the rotation speed of the drive wheels increases.

Also, the heavy actuator 17 is attached to the engine body.
15 and the link mechanism 16 is made only of the links 16a and 16b having a small weight.
Is small, the lever 14 does not move in the direction of increasing the injection amount of the pump 13, and even if the second link 16b has a small weight, the inertial force acting on this link 16b is small. Is rotated in a direction to decrease the fuel injection amount. As a result, the conventional return spring becomes unnecessary, so that the pressing force of the pedal 11 is not increased.

In the embodiment, the air cylinder is used as the actuator. However, this is an example, and a hydraulic cylinder, an electromagnetic solenoid, or the like may be used.

In the embodiment, the center of the first link is pivotally supported by the piston rod. However, the invention is not limited to this. The second link is pivotally supported by the center of the first link, and the other end of the first link is pivotally supported by the piston rod. May be.

[Effects of the Invention] As described above, according to the present invention, if a difference in rotation speed occurs between the drive wheel and the guide wheel during acceleration, the actuator projects the piston rod, and thus the control lever is moved to the first and second positions. It rotates in a direction to decrease the fuel injection amount via two links. As a result, it is possible to prevent the drive wheels from slipping during acceleration of the vehicle.

In addition, the actuator is fixed to the engine body, the link mechanism is made only of the first and second links having a small weight, and the inertia of the components constituting the link mechanism is reduced, so that the control lever increases the injection amount of the pump at the time of sudden braking. Not only in the direction in which
Since the control lever rotates in the direction to decrease the fuel injection amount by the inertial force acting on the link, the rotation speed of the engine can be positively reduced.

Further, conventionally, means for preventing the control lever from moving in the direction to increase the injection amount of the pump during sudden braking, that is, a return spring or the like becomes unnecessary, so that the depression force of the accelerator pedal is not increased.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a traction control device according to an embodiment of the present invention. FIG. 2 is a configuration diagram showing a conventional apparatus. 11: accelerator pedal, 12: accelerator cable, 13: injection pump, 14: control lever, 15: engine body, 16:
Link mechanism, 16a: first link, 16b: second link, 17: actuator, 17a: piston rod.

Claims (1)

(57) [Scope of request for utility model registration] An accelerator cable (12) having one end connected to an accelerator pedal (11) of a vehicle and the other end connected to a control lever (14) of a fuel injection pump (13) via a link mechanism (16). When the rotation speed of the drive wheel provided in the link mechanism (16) is higher than the rotation speed of the driven wheel by more than a specified value, the control lever (14) is moved in a direction to decrease the injection amount of the pump (13). In a traction control device including an actuator (17) for moving, the link mechanism (16) includes a first link and a second link (16a, 16).
b), the actuator (17) is fixed to the engine body, the accelerator cable (12) is connected to one end of the first link (16a) and the center or the other end of the first link (16a) Actuator (17) piston rod (17
a) is pivotally supported, and one end of the second link (16b) is connected to the other end or the center of the first link (16a), and the inertia force acting on the second link (16b) during braking of the vehicle The other end of the second link (16b) is connected to the control lever (1) so that the control lever (14) rotates in a direction to decrease the injection amount of the pump (13).
A traction control device, which is connected to 4).