JPH0518279A - Accel operating device - Google Patents

Abstract

PURPOSE:To perform mechanical opening and closing of a throttle valve by completing compression of a spring through engagement of a stopper part by pedaling an accel. pedal when a control system for electrically opening and closing a throttle valve based on a detecting value from an accel. sensor is failed in operation. CONSTITUTION:Since, when an accel. pedal 14 is pedaled, a pedal rod 13 is rotated, an accel. shaft 12 and a cam plate 16 are rotated. In which case, a cam lever 20 is rotated through a roller 21. The rotation angle of the pedal rod 13 is transmitted to a sensor shaft 17 and the rotation is detected by means of an accel. sensor 19. As a result, based on a detecting value, a throttle valve 25 is electrically opened and closed. Meanwhile, an electric opening closing control system operated by the accel. sensor 19 is failed in operation, the accel. pedal 14 is pedaled with a high force. A spring guide 27 is engaged with a plate 23 to complete compression of a spring 24, and by effecting traction of an accel. cable 26, a throttle valve 25 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator operating device for opening and closing an engine throttle by detecting the depression amount of an accelerator pedal by an opening sensor.

[0002]

2. Description of the Related Art As a conventional example of this type of throttle valve control device, there is one disclosed in, for example, Japanese Patent Laid-Open No. 51-138235. In these throttle valve control devices, a throttle valve is controlled. Motor electric circuit,
Many electric parts such as various sensors are used, but when the throttle valve cannot be controlled due to the failure of these electric parts, it is possible to control the throttle valve. If no countermeasures were taken, the throttle valve could not be controlled immediately if the electrical system failed.Especially, in the case of automobile engines, even the risk avoidance measures of moving the automobile to a safe place for the time being were taken. There will be problems such as being unable to do so.

As a means for solving this, there is a conventional one disclosed in JP-A-59-122742.

The device disclosed in Japanese Patent Application Laid-Open No. 59-122742 has an accelerator pedal 1 as shown in FIG.
The accelerator opening sensor 2 detects the amount of depression of the accelerator pedal, and the throttle valve control device 3 drives a reversible rotary motor (stepping motor) 4 based on the detected value to control the opening and closing of the throttle valve 5. ing.

Further, in this device, when the accelerator pedal 1 is connected to the pulley 7 by the accelerator cable 6 and the electric control system of the throttle valve by the accelerator opening sensor 2 or the like fails, the pulley 7 is moved to the throttle valve side. The throttle valve 5 is connected to the pulley 8 which is connected to so as to rotate integrally therewith, and the opening / closing control of the throttle valve 5 can be directly performed by pulling the accelerator cable 6.

[0006]

However, since the above-mentioned conventional accelerator operating device is provided with the pulley, the device including the motor becomes larger by that amount. Also, the cable is 2
This is required, which leads to an increase in the number of parts, a cost increase, and an assembly man-hour. Further, since the two cables operate independently except in an emergency and the throttle is controlled by the cables, responsiveness and durability are poor.

The present invention has been made in order to eliminate the drawbacks of the conventional accelerator operating device as described above.

That is, the present invention relates to an accelerator operating device for electrically detecting the depression amount of the accelerator pedal to control the opening / closing of a slot / le valve, when the electrical opening / closing control system of the throttle valve fails. It is an object of the present invention to provide an accelerator operating device that can mechanically directly open and close a throttle valve by depressing.

[0009]

In order to achieve the above-mentioned object, the present invention detects the depression amount of an accelerator pedal by an opening sensor and electrically drives a motor based on the detected value to throttle the throttle. In an accelerator operating device that controls opening and closing of a valve, a pedal rod connected to an accelerator pedal, an accelerator shaft connected to the pedal rod and rotatably supported by a support member, a plate fixed to the pedal rod, and a throttle at one end. An accelerator cable connected to the valve side, a spring guide that holds the spring between the plate and the other end of this accelerator cable is fixed elastically, and a pedal rod provided on at least one of the spring guide and the plate. When the set angle is exceeded, the spring guide and plate are connected and the accelerator cave The is characterized in that driven directly by the pedal rod.

[0010]

In the accelerator operating device, when the accelerator pedal is depressed, the pedal rod rotates, and the accelerator sensor detects the rotation angle of the pedal rod, that is, the amount of depression of the accelerator pedal, and the throttle valve is detected based on the detected value. Open / close control.

When the electric valve opening / closing control system based on the detection value of the accelerator sensor as described above fails, the accelerator cable is pulled up to a predetermined angle by bending the spring when the accelerator pedal is fully depressed. However, when the rotation angle of the pedal rod exceeds a predetermined angle, the stopper member engages and the compression of the spring ends, and the accelerator cable is pulled as the rotation angle of the pedal rod increases thereafter. Then, the throttle valve is opened and closed.

Therefore, when the rotation angle of the pedal rod becomes a predetermined angle or more, it becomes possible to mechanically control the opening and closing of the throttle valve by pulling the accelerator cable by the rotation of the pedal rod.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on the embodiments shown in the drawings.

In FIGS. 1 and 2, a pedal shaft 12 is rotatably supported laterally on the lower end of a bracket 11 fixed to the floor of the driver's seat.
2, a pedal rod 13 extending in the vertical direction is fixed, and an accelerator pedal 14 is attached to the lower end of the pedal rod 13, and when the accelerator pedal 14 is depressed, the pedal rod 13 rotates about the pedal shaft 12. It is like this. A return spring 15 is inserted between the pedal rod 13 and the bracket 11 and the center of which is inserted into the pedal shaft 12, and urges the pedal rod 13 counterclockwise in FIG. ..

A proximal end portion of a cam plate 16 as shown in FIG. 3 is fixed to the pedal shaft 12 on the left end side in FIG. 1 so as to rotate integrally with the pedal shaft 12. There is.

A sensor shaft 17 is rotatably supported by a bracket 11 on the front side of the pedal rod 13 and above the pedal shaft 12, and a sensor lever 18 is attached to one end (the left end in FIG. 1) of the sensor shaft 17. The accelerator sensor 1 fixed to rotate integrally and attached to the bracket 11 by the sensor lever 18
9 is activated.

A roller 21 attached to the tip of the cam lever 20 is fixed to the sensor shaft 17 at a position close to the cam plate 16 so that the base end of the cam lever 20 rotates integrally. Cam plate 16
It is fitted in a recess 16a formed inside the front end of the cam plate 20, and the cam lever 20 rotates in conjunction with the rotation of the cam plate 16 to rotate the sensor shaft 17.
A return spring 22 is interposed between the sensor shaft 17 and the bracket 11 with its center inserted in the sensor shaft 17, and biases the sensor shaft 17 in the counterclockwise direction in FIG. is doing.

Here, in the link mechanism (rotational amplification mechanism) constituted by the cam plate 16 and the lever 17, the distance l1 between the center of the accelerator shaft 12 and the center of the roller 21, and the center of the roller 21 and the sensor shaft 17 are described.
The ratio of the distance from the center of the pedal to the distance l2 is 4: 1 (see FIG. 3). At the upper end of the pedal rod 13, as shown in FIG. It is attached along the rotation line of the pedal rod 13, and the end of the accelerator cable 26, which is connected to the throttle valve 25 side at one end and penetrates the bracket 11 from the back side, is attached to the tip of the spring 24. Spring guide 2 with the center inserted
7 are linked together. The plate 23 is provided with a guide groove 23A that guides the accelerator cable 26 to the spring guide 27 so that the accelerator cable 26 does not interfere with the spring 24.
A positioning protrusion 27A that is fitted into the inside of the connector 4 is formed.

This spring 24 corresponds to the accelerator pedal 1
When the depression angle of 4 is zero, the accelerator cable 26 is prevented from being loosened between itself and the throttle valve 25, and even if the pedal rod 13 is rotated clockwise in FIG. The spring constant is such that the accelerator cable 26 is not bent and pulled. That is, in a normal state where the pedal rod is equal to or less than the set angle, the spring 24 only elastically contracts and does not affect the drive of the motor directly attached to the throttle valve 25.

When the pedal rod 13 is rotated up to a predetermined angle α (state of FIG. 4), the spring guide 27 is engaged with the plate 23 by the compression of the spring 24. This predetermined angle α is equal to the pedal rod 13
It is preferable to set the rotation angle to about 3/4 of the maximum rotation angle, but it can be arbitrarily set by adjusting the length of the accelerator cable 26.

In the accelerator operating device, when the accelerator pedal 14 is stepped on, the pedal rod 13 rotates about the accelerator shaft 12 against the return spring 15, whereby the accelerator shaft 12 and the cam plate 16 shown in FIG. Rotate in the direction of arrow X. By the rotation of the cam plate 16, the cam lever 20 connected to the tip of the cam plate 16 via the roller 21 is rotated in the same direction.

At this time, since the ratio of l1 to l2 is 4: 1, the ratio of the rotation angle θ1 of the cam plate 16 to the rotation angle θ2 of the lever is 1: 4, and the cam plate 16
Therefore, the rotation angle of the pedal rod 13, which corresponds to the depression amount of the accelerator pedal 14, is amplified four times and transmitted to the sensor shaft 17.

The rotation of the sensor shaft 17 is detected by the accelerator sensor 19 via the sensor lever 18. Therefore, the accelerator sensor 19 can detect a large turning angle which is amplified four times as much as the actual depression amount of the accelerator pedal 14, and the opening / closing control of the throttle valve 26 can be performed based on the detected value. I can.

The amplification value of the rotation angle can be arbitrarily set by arbitrarily setting the ratio of l1 to l2.

Then, the accelerator sensor 19 as described above is used.
When the electrical opening / closing control system of the throttle valve due to a failure occurs, the accelerator pedal 26 is fully depressed to rotate the pedal rod 13, and the accelerator cable 26 is pulled up to the predetermined angle α by the bending of the spring 24. However, when the rotation angle of the pedal rod 13 becomes equal to or larger than the predetermined angle α, the spring guide 27 engages with the plate 23 and the compression of the spring 24 ends, and thereafter the rotation angle of the pedal rod 13 increases. Accordingly, the accelerator cable 26 is pulled and the throttle valve 25 is opened.

Therefore, even if the electric opening / closing control system of the throttle valve fails, the opening / closing control of the throttle valve 25 can be performed within a predetermined range by depressing the accelerator pedal 14. For example, the vehicle is repaired at a low speed. It is possible to carry it to factories.

When the electrical control system for the throttle valve is operating normally, the accelerator pedal 14
In the vicinity of the maximum depression angle of, the electric opening / closing control system and the mechanical opening / closing control system by the accelerator cable 26 are simultaneously actuated. However, in the accelerator cable 26, the pedal rod 13 is rotated by a predetermined angle α or more. Since the vehicle is towed later, the opening / closing amount of the throttle valve 25 by the accelerator cable 26 becomes smaller than the opening / closing amount by the electrical opening / closing control system, so the mechanical opening / closing control system does not affect the opening / closing of the throttle valve. It is substantially inoperative.

[0028]

As described above, according to the present invention, when the electric opening / closing control system of the throttle valve fails, the throttle valve can be mechanically directly opened / closed by depressing the accelerator pedal. Becoming
Only one cable is required, and it can be adopted in a configuration in which the motor directly controls the throttle except in an emergency, and the responsiveness and durability are improved.

Furthermore, since the present invention can be constructed by adding several parts such as springs, the structure is simple.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention,

FIG. 2 is a side view of the embodiment,

FIG. 3 is a partial cross-sectional view showing a cross section taken along line III-III in FIG.

FIG. 4 is a side view showing a towed state of the accelerator cable in the embodiment.

FIG. 5 is a perspective view showing a conventional example.

[Explanation of symbols]

 12 ... Accelerator shaft 13 ... Pedal rod 14 ... Accelerator pedal 16 ... Cam plate 16a ... Recessed portion 17 ... Sensor shaft 19 ... Accelerator sensor 20 ... Cam lever 21 ... Roller 23 ... Plate 24 ... Spring 25 ... Throttle valve 26 ... Accelerator cable 27 ... Spring guide

Claims (1)

Claim: What is claimed is: 1. An accelerator operating device for detecting an amount of depression of an accelerator pedal by an opening sensor and electrically driving a motor based on the detected value to control opening / closing of a throttle valve. A pedal rod connected to the accelerator pedal, an accelerator shaft connected to the pedal rod and rotatably supported by a supporting member, a plate fixed to the pedal rod, an accelerator cable having one end connected to the throttle valve side, and The spring guide, which is fixed to the other end of the accelerator cable and elastically retains the spring between the plate and the spring guide, is provided on at least one of the spring guide and the plate. An accelerator that connects and drives the accelerator cable directly with the pedal rod Operating device.