JPH09207606A - Accel device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To approximate the operation feeling of an acceleration pedal for a vehicle with an electronic fuel supply device to the operation feeling of an acceleration petal for a vehicle with a mechanical fuel supply device by enlarging a difference between the stepping force on and reacting force from the acceleration pedal. SOLUTION: The lower end of an acceleration pedal 14 is pivotally mounted on a body 13 and a first lever 11 is pivotally mounted in a second shaft 22. The end of a first arm 11a of the first lever is engaged with the acceleration pedal. An arm 17c is fixed to a sensor shaft 17b of an acceleration sensor 17 and connected to a second arm 11b of the first lever via a link 18. A hysteresis applying means 19 is connected between the second arm and the arm. The hysteresis applying means has a cylinder 23 pivotally mounted on the second arm via a first rod 23a, a piston 24 pivotally mounted on the arm via a second rod 24a to be slidable in the cylinder and a spring 26 stored in the cylinder to reset the acceleration pedal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle accelerator system having an electronic fuel supply system. More specifically, the present invention relates to an accelerator device for a vehicle configured such that an accelerator sensor detects a depression amount of an accelerator pedal and a controller controls an electronic fuel supply device based on a detection output of the sensor.

[0002]

2. Description of the Related Art Conventionally, in an accelerator device for a vehicle having a mechanical fuel supply device, an accelerator pedal is connected to a control lever of the mechanical fuel supply device via a cable. The cable has an outer cable and an inner cable that slides in the outer cable when the accelerator pedal is depressed. Further, a spring is locked on the control lever, and the accelerator pedal depressed by the elastic force of the spring is restored. In the accelerator device configured as described above, when the foot is released after depressing the accelerator pedal, the elastic force of the spring causes the inner cable to return. At this time, the inner cable causes a return operation due to sliding resistance generated between the inner cable and the outer cable. Become slow. As a result, the difference in the pedaling force when the accelerator pedal is depressed and when the accelerator pedal is returned is widened, that is, the hysteresis width is widened. However, in recent years, an increasing number of vehicles are equipped with an electronic fuel supply device for the purpose of improving fuel efficiency and purifying exhaust gas. In such vehicles, the accelerator pedal detects the depression amount of this pedal through a link mechanism. Since it is connected to the accelerator sensor, the hysteresis width is narrow and the operation feeling of the accelerator pedal is different from the above.

In order to solve this problem, the present applicant has configured the controller to electrically control the electronic fuel supply device based on the detection output of the accelerator sensor that detects the rotation of the support shaft of the accelerator pedal. An annular member is fitted to the support shaft, and a substantially U-shaped holder that holds the outer peripheral surface of the annular member via a friction material formed of felt or the like is fixed to the vehicle body. Filed a utility model registration application for an automobile accelerator device provided with an adjusting device for adjusting the sliding resistance of the above-mentioned annular member and friction material.
1-1161030). In this accelerator device, a spring that restores the depressed accelerator pedal is interposed between the accelerator pedal and the vehicle body, and a stopper that temporarily fixes the accelerator pedal at the restored position is provided on the vehicle body in a protruding manner. In the accelerator device configured as described above, when the accelerator pedal is depressed, the supporting shaft rotates while resisting the elastic force of the spring and receiving the sliding resistance of the friction member, and when the foot is released from the accelerator pedal, the supporting shaft is supported. The shaft returns while receiving the sliding resistance of the friction member due to the elastic force of the spring. As a result, the difference in the pedaling force between when the accelerator pedal is depressed and when the accelerator pedal is returned is widened, that is, the hysteresis width is widened, so that the operation feeling of the accelerator pedal can be approximated to that of the mechanical fuel supply device.

[0004]

However, in the above-described conventional improved accelerator device for a vehicle, since the friction member is formed of felt or the like, the friction member and the annular member can be used for a relatively short time. There was a problem that the sliding resistance changed and the operation feeling of the accelerator pedal changed. In such a case, the sliding resistance is finely adjusted by the adjusting device, but there is a problem that the fine adjustment is relatively troublesome. Further, in the above-described conventional improved vehicle accelerator device, there is a problem that the number of parts is relatively large and the assembling work requires a relatively long time.

An object of the present invention is to widen the difference between the pedaling force when the accelerator pedal is depressed and when the accelerator pedal is returned, so that the operation feeling of the accelerator pedal of a vehicle having an electronic fuel supply device can be changed to a vehicle having a mechanical fuel supply device. An object of the present invention is to provide an accelerator device for a vehicle that can approximate the operation feeling of the accelerator pedal. Another object of the present invention is that the operation feeling of the accelerator pedal hardly changes even after long-term use,
An object of the present invention is to provide an accelerator device for a vehicle that can reduce the number of parts and the number of assembly steps.

[0006]

The invention according to claim 1 is
As shown in FIGS. 1 and 2, a depressible accelerator pedal 14 whose lower end is pivotally attached to a vehicle body 13 via a first shaft 21.
And a second shaft 22 having first and second arm portions 11a and 11b.
The first lever 11 pivotally attached to the vehicle body through the front end of the first arm portion 11a engages with the accelerator pedal 14, the sensor main body 17a, and the sensor shaft 17b rotatably attached to the sensor main body 17a. An arm 17 fixed to the sensor shaft 17b and connected to the second arm portion 11b via a link 18.
It is an improvement of an accelerator device for a vehicle, which includes an accelerator sensor 17 having c and for detecting a rotation angle of an arm 17c, and a controller for controlling an electronic fuel supply device based on a detection output of the accelerator sensor 17. The characteristic configuration is that the second arm 11b and the arm 17c are provided separately from the link 18.
The hysteresis adding means 19 is connected between the cylinder 23 and the cylinder 23, one end of which is pivotally attached to the second arm 11b or the arm 17c through the first rod 23a, and the other end of which is the arm 17c or the first cylinder 23c. A piston 24 pivotally attached to the second arm 11b via a second rod 24a and slidable in the cylinder 23 with a predetermined sliding resistance, and a piston 24 housed in the cylinder 23 in a direction away from or closer to the first rod 23a. And a spring 26 for returning the depressed accelerator pedal 14 by urging it in the direction.

In this accelerator system, the accelerator pedal 1
When stepping on 4, the arm 17c rotates via the first lever 11 and the link 18. At this time, since the total length of the hysteresis adding means 19 becomes short or long, the piston 24 resists the elastic force of the spring 26 and has a predetermined sliding resistance.
It slides relative to the cylinder 23. When the accelerator pedal 14 is stopped and the foot is returned, the elastic force of the spring 26 causes the piston 24 to slide in the cylinder 23 and the accelerator pedal 14 to try to return. By the specified sliding resistance of
Become slow. As a result, the difference in pedaling force between when the accelerator pedal 14 is depressed and when it is returned is widened.

According to the second aspect of the present invention, as shown in FIGS. 4 and 5, the upper end is fixed to the third shaft 63 rotatably attached to the vehicle body, and the third shaft 63 is centered around the third shaft 63. A depressible accelerator pedal 54 configured to be rotatable together with the shaft 63; a second lever 52 having a base end fixed to the third shaft 63 and rotatable about the third shaft 63 together with the third shaft 63;
Rotation of the arm 17c having a sensor body 17a, a sensor shaft 17b rotatably attached to the sensor body 17a, and an arm 17c fixed to the sensor shaft 17b and connected to the second lever 52 via a link 18. It is an improvement of an accelerator device for a vehicle that includes an accelerator sensor 17 that detects an angle and a controller that controls an electronic fuel supply device based on a detection output of the accelerator sensor 17. The characteristic configuration is that, apart from the link 18, the hysteresis adding means 19 is connected between the second lever 52 and the arm 17c, and one end of the hysteresis adding means 19 is the second lever 5
Cylinder 23 pivotally attached to the arm 17c or the second lever 52 via the second rod 24a, and the cylinder 23 pivotally attached to the arm 17c via the first rod 23a.
Piston 24 capable of sliding inside 3 with a predetermined sliding resistance
And a spring 2 that is housed in the cylinder 23 and that restores the accelerator pedal 54 that is stepped on by urging the piston 24 in a direction away from or closer to the first rod 23a.
6 and 6.

In this accelerator system, the accelerator pedal 5
When step 4 is depressed, the arm 17c rotates via the second lever 52 and the link 18. At this time, since the total length of the hysteresis adding means 19 becomes short or long, the piston 24 resists the elastic force of the spring 26 and has a predetermined sliding resistance.
It slides relative to the cylinder 23. When the accelerator pedal 54 is stopped and the foot is returned, the elastic force of the spring 26 causes the piston 24 to slide in the cylinder 23 and the accelerator pedal 54 to try to return. By the specified sliding resistance of
Become slow. As a result, the difference in pedal effort between when the accelerator pedal 54 is depressed and when it is returned is widened.

[0010]

Next, a first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, an accelerator device 12 of a vehicle equipped with a diesel engine includes an accelerator pedal 14 having a lower end rotatably attached to a vehicle body 13 via a first shaft 21, and an accelerator pedal 14 Arm 1 connected to the arm 1 via a link mechanism 16
An accelerator sensor 17 having 7c for detecting the rotation angle of the arm 17c, and a controller for controlling an electronic fuel supply device (not shown) based on the detection output of the accelerator sensor 17 are provided.

The link mechanism 16 includes the first and second arm portions 11.
A vehicle body (not shown) having a and 11b through a second shaft 22.
It has a first lever 11 pivotally attached to the first arm 11 and a link 18 connecting the second arm portion 11b and the arm 17c. 2nd axis 2
2 is rotatably attached to a vehicle body (not shown). First
The arm 11a has a base end fixed to the second shaft 22, a front end engaged with the accelerator pedal 14, and is configured to be rotatable together with the second shaft 22. The base end of the second arm 11b is fixed to the second shaft 22, and the lower end of the link 18 is pivotally mounted near the tip. The upper end of the link 18 is pivotally attached to the tip of the arm 17c.

The accelerator sensor 17 is a sensor body 17a.
And a sensor shaft 17b rotatably attached to the sensor body 17a, and the above-mentioned arm 17c whose base end is fixed to the sensor shaft 17b. The sensor body 17a is fixed to the vehicle body (not shown), and the base end of the arm 17c is fixed to the tip of the sensor shaft 17b protruding from the sensor body 17a. Although not shown, the electronic fuel supply device has a fuel injection nozzle for injecting fuel into the engine, a fuel injection pump for sending fuel under pressure to this nozzle, and an electronic governor for controlling a control rack of this pump. The controller is configured to control the electronic governor based on the detection output of the sensor.

The characteristic configuration of this embodiment is that the link 1
In addition to 8, the hysteresis adding means 19 is connected between the second arm portion 11b and the arm 17c. The hysteresis adding means 19 has a cylinder 23 whose one end is pivotally attached to the second arm 11b via the first rod 23a, and a piston 24 whose one end is pivotally attached to the arm 17c via the second rod 24a. The first rod 23a is the second arm 1
The second rod 24a is pivotally attached to the tip of the arm 1b.
It is pivotally attached at approximately the center in the longitudinal direction of c. A damping force cup 24b made of rubber or soft plastics is fitted on the outer peripheral surface of the piston 24.
The outer peripheral surface of b is formed into a plurality of ring-shaped protrusions extending in the circumferential direction. These ring-shaped protrusions are configured to slidably contact the inner peripheral surface of the cylinder 23. 23b
Is a through hole formed to prevent a pressure change in the cylinder 23 due to the sliding of the piston 24. A spring 26 is housed in the cylinder 23. This spring 26 is a compression coil spring, and by urging the piston 24 in the direction of separating it from the first rod 23a, that is, the direction of pushing the second rod 24a out of the cylinder 23, the depressed accelerator pedal 14 is returned. Has become.

Although the diesel engine is used as the engine, a gasoline engine may be used. In the case of a gasoline engine, an electronic carburetor, an electronic injector, etc. are used as an electronic fuel supply device. Further, one end of the cylinder may be pivotally attached to the arm via the first rod, and one end of the piston may be pivotally attached to the second arm portion via the second rod. Further, the first and second arm portions of the first lever may be integrally formed, and the substantially center of this lever may be rotatably attached to the second shaft. In this case, the second shaft can be fixed to the vehicle body. Further, the link may be provided at the position of the hysteresis adding means, and the hysteresis adding means may be provided at the position of the link. In this case, the spring is housed in the cylinder so as to bias the piston toward the first rod, that is, the second rod is pulled into the cylinder. The elastic force of this spring returns the depressed accelerator pedal.

The operation of the accelerator device for a vehicle thus configured will be described. When the accelerator pedal 14 is stepped on, the first arm portion 11a of the first lever 11 rotates around the second shaft 22 together with the second shaft 22 in the direction of the solid line arrow in FIG.
The arm portion 11b rotates about the second shaft 22 in the direction of the dashed arrow together with the second shaft 22. By the above rotation of the second arm portion 11b, the arm 17c rotates about the sensor shaft 17b in the direction of the alternate long and short dash line via the link 18 together with the sensor shaft 17b. At this time, the tip of the second arm portion 11b and the substantially center of the arm 17c come close to each other, so that the total length of the hysteresis adding means 19 becomes short. As a result, the piston 24 slides in the direction indicated by the two-dot chain line arrow relative to the cylinder 23 against the elastic force of the spring 26 and with a predetermined sliding resistance, and reaches the position shown in FIG.

When the accelerator pedal 14 is stopped and the foot is returned, the elastic force of the spring 26 causes the piston 24 to slide in the cylinder 23 in the direction of the solid line arrow in FIG. However, the returning speed becomes slower due to a predetermined sliding resistance between the outer peripheral surface of the damping force cup 24b and the inner peripheral surface of the cylinder 23. As a result, the difference in pedaling force between when the accelerator pedal 14 is depressed and when it is returned is widened, that is, the hysteresis width h (FIG. 3).
Spreads. As a result, the operation feeling of the accelerator pedal 14 can be approximated to the operation feeling of the accelerator pedal of the vehicle having the mechanical fuel supply device.

4 and 5 show a second embodiment of the present invention. 4 and 5, the same reference numerals as those in FIG. 1 indicate the same parts. In this embodiment, the upper end of the accelerator pedal 54 is a third body rotatably attached to a vehicle body (not shown).
It is fixed to the shaft 63. The link mechanism 56 connecting the accelerator pedal 54 and the arm 17c of the accelerator sensor 17 has a second lever 52 having a base end fixed to the third shaft 63, and a second lever 52.
It has a link 18 connecting the lever 52 and the arm 17c. The accelerator pedal 54 and the second lever 52 are the third
It is configured to be rotatable around the shaft 63 together with the third shaft 63. The lower end of the link 18 is pivotally attached near the tip of the second lever 52, and the upper end of the link 18 is pivotally attached to the tip of the arm 17c.

The characteristic configuration of this embodiment is that the link 1
In addition to 8, the hysteresis adding means 19 is connected between the second lever 52 and the arm 17c. The hysteresis adding means 19 has a cylinder 23 having one end pivotally attached to the second lever 52 via the first rod 23a, and a piston 24 one end pivotally attached to the arm 17c via the second rod 24a. The first rod 23a is pivotally attached to the tip of the second lever 52, and the second rod 24a is connected to the arm 17a.
It is pivotally attached at approximately the center in the longitudinal direction of c. The configuration other than the above is the same as that of the first embodiment.

It should be noted that one end of the cylinder may be pivotally attached to the arm via the first rod and one end of the piston may be pivotally attached to the second lever via the second rod. Further, the link may be provided at the position of the hysteresis adding means, and the hysteresis adding means may be provided at the position of the link. In this case, the spring is housed in the cylinder so as to bias the piston toward the first rod, that is, the second rod is pulled into the cylinder. The elastic force of this spring returns the depressed accelerator pedal.

The operation of the accelerator device for a vehicle thus configured will be described. When the accelerator pedal 54 is depressed, the second lever 52 rotates around the third shaft 63 together with the third shaft 63 in the direction of the solid arrow in FIG. 4, and the arm 17c rotates the sensor shaft 17b by the above rotation of the lever 52. It rotates in the direction of the one-dot chain line arrow through the link 18 together with the sensor shaft 17b at the center. At this time, the tip end of the second lever 52 and the approximate center of the arm 17c approach each other, so that the total length of the hysteresis adding means 19 becomes short. As a result, the piston 24
5 slides relatively to the cylinder 23 in the direction indicated by the chain double-dashed arrow against the elastic force of the spring 26 and with a predetermined sliding resistance, and reaches the position shown in FIG.

When the accelerator pedal 54 is stopped and the foot is returned, the elastic force of the spring 26 causes the piston 24 to slide in the cylinder 23 in the direction of the solid line arrow in FIG. However, the returning speed becomes slower due to a predetermined sliding resistance between the outer peripheral surface of the damping force cup 24b and the inner peripheral surface of the cylinder 23. As a result, the difference in pedaling force between when the accelerator pedal 54 is depressed and when it is returned is widened, that is, the hysteresis width is widened.
As a result, the operation feeling of the accelerator pedal 54 can be approximated to the operation feeling of the accelerator pedal of the vehicle having the mechanical fuel supply device.

[0022]

As described above, according to the present invention, the lower end of the accelerator pedal is pivotally attached to the vehicle body, and the hysteresis is connected between the second arm portion and the arm of the first lever separately from the link. One end of the cylinder of the adding means is pivotally attached to the second arm portion or arm via the first rod, and one end of a piston slidable in the cylinder with a predetermined sliding resistance is secondly attached to the arm or second arm portion. Since it is configured to pivotally mount via a rod and further to restore the accelerator pedal on which the spring housed in the cylinder is stepped on, the difference in pedaling force between when the accelerator pedal is stepped on and when it is returned is widened, and the electronic fuel supply device is installed. The operation feeling of the accelerator pedal of the vehicle having the same can be approximated to the operation feeling of the accelerator pedal of the vehicle having the mechanical fuel supply device.

Further, in comparison with the conventional improved accelerator device for a vehicle, in which the operation feeling of the accelerator pedal is changed by using it for a relatively short time, the accelerator device of the present invention has an accelerator pedal which is used for a long period of time. The operation feeling of is almost unchanged. In addition, the accelerator device of the present invention has a relatively large number of parts, and in comparison with the conventional improved accelerator device for a vehicle that requires a relatively long time for its assembly work,
The number of parts and the number of assembly steps can be reduced.

Further, the upper end of the accelerator pedal is pivotally attached to the vehicle body, and one end of the cylinder of the hysteresis adding means connected between the second lever and the arm is separated from the link and the first rod is attached to the second lever or arm. An accelerator in which one end of a piston that is pivotally attached via a second rod is slidable in the cylinder with a predetermined sliding resistance is pivotally attached to an arm or a second lever via a second rod, and a spring housed in the cylinder is stepped on. Even if the pedal is returned, the same effect as above can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a state in which an accelerator pedal of an accelerator device according to a first embodiment of the present invention is not depressed.

FIG. 2 is a configuration diagram corresponding to FIG. 1 showing a state in which the accelerator pedal is depressed.

FIG. 3 is a characteristic diagram showing changes in the pedal effort of the accelerator pedal with respect to the stroke of the accelerator pedal.

FIG. 4 is a configuration diagram showing a state in which an accelerator pedal of the accelerator device according to the second embodiment of the present invention is not depressed.

5 is a configuration diagram corresponding to FIG. 4, showing a state in which the accelerator pedal is depressed.

[Explanation of symbols]

 11 1st lever 11a 1st arm part 11b 2nd arm part 12 Accelerator device 13 Vehicle body 14,54 Accelerator pedal 17 Accelerator sensor 17a Sensor main body 17b Sensor shaft 17c Arm 21 1st shaft 22 2nd shaft 23 Cylinder 23a 1st rod 24 Piston 24a Second rod 26 Spring 52 Second lever 63 Third shaft

Claims (2)

[Claims] 1. A depressible accelerator pedal (14) having a lower end pivotally attached to a vehicle body (13) through a first shaft (21), and first and second arm portions (11a, 11b). The first arm portion (11a) is pivotally attached to the vehicle body through a second shaft (22) and the tip end of the first arm portion (11a) is the accelerator pedal.
The first lever (11) engaging with (14), the sensor body (17a), the sensor shaft (17b) rotatably attached to the sensor body (17a), and the sensor shaft (17b) are fixed. An accelerator sensor (17) having an arm (17c) connected to the second arm portion (11b) via a link (18) for detecting a rotation angle of the arm (17c); ), The controller for controlling the electronic fuel supply device based on the detection output of (1), in the accelerator device of the vehicle, in addition to the link (18), the second arm (11b) and the arm (17c) Hysteresis adding means (19) is connected therebetween, and one end of the hysteresis adding means (19) is pivotally attached to the second arm part (11b) or the arm (17c) via the first rod (23a). And a cylinder (23), one end of which is pivotally attached to the arm (17c) or the second arm portion (11b) through a second rod (24a) and a predetermined inside of the cylinder (23). A piston (24) which is slidable with a sliding resistance, and the stepping by being biased in a direction of moving the piston (24) housed in the cylinder (23) away from or closer to the first rod (23a). An accelerator device for a vehicle, comprising: a spring (26) for returning the accelerator pedal (14). 2. A structure in which an upper end is fixed to a third shaft (63) rotatably attached to a vehicle body so as to be rotatable together with the third shaft (63) about the third shaft (63). Accelerator pedal (54) which can be stepped on and a second lever whose base end is fixed to the third shaft (63) and is rotatable with the third shaft (63) around the third shaft (63) (52), a sensor body (17a), a sensor shaft (17b) rotatably attached to the sensor body (17a), and a sensor shaft (17b) fixed to the second lever (52). An accelerator sensor (17) for detecting a rotation angle of the arm (17c) having an arm (17c) connected via 18).
And a controller that controls an electronic fuel supply device based on a detection output of the accelerator sensor (17), wherein the second lever (52) and the controller are provided separately from the link (18). Hysteresis adding means (19) is connected to the arm (17c), and the hysteresis adding means (19) has a first end on the second lever (52) or the arm (17c).
A cylinder (23) pivotally attached via a rod (23a) and one end of the cylinder (23) is attached to the arm (17c) or the second lever (52).
A piston (24) pivotally mounted via a rod (24a) and slidable in the cylinder (23) with a predetermined sliding resistance; and a piston (24) housed in the cylinder (23) that includes the first piston (24). An accelerator device for a vehicle, comprising: a spring (26) that restores the depressed accelerator pedal (54) by urging the rod (23a) away from or toward the rod (23a).