JP2000320349A - Accelerator pedal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronically controlled accelerator pedal device that can improve the sense of accelerator operation. SOLUTION: An accelerator sensor 10 has, on its sensor lever 13 interlocked with a pedal lever 3, a switch actuating member 22 for working a pressure element 21 of an accelerator fully closed switch 20, so that the sensor lever 13 can actuate the accelerator fully closed switch 20 directly. The accelerator sensor 10 thus involves a minimal dead zone or offers an improved sense of accelerator operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator pedal device used for a vehicle such as an automobile, and more particularly, to an electronic control system for converting a depression amount of a pedal lever into an electric amount to control a throttle valve opening, a fuel injection amount, and the like. The present invention relates to an accelerator pedal device.

[0002]

2. Description of the Related Art An electronically controlled accelerator pedal device is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-83224, in which the amount of depression of a pedal lever is controlled by the rotation of a sensor lever interlocked with the pedal lever. The throttle valve opening, the fuel injection amount, and the like are electrically controlled based on the detection action of the accelerator sensor by detecting as an electric quantity by a sensor, and the pedal lever is released when the pedal lever is released. The throttle valve opening and the fuel injection amount corresponding to the idling operation are controlled by the operation of the accelerator full-close switch that detects the initial position as the accelerator full-close position.

[0003]

Since the accelerator sensor and the accelerator fully-closed switch are separately arranged, an assembly error of these two components inevitably occurs. However, it is necessary to take continuous operation timing of the accelerator fully-closed switch and the accelerator sensor with respect to the rotation of the pedal lever so as to obtain a driving characteristic in which the output rises smoothly from the idle rotation.
Therefore, as shown in FIG. 6, a relatively large dead zone A of the pedal stroke is provided to the accelerator sensor so as to absorb the mounting error in addition to the play stroke of the pedal lever.
₁ is set.

[0004] Consequently, with respect to the depression of the pedal lever, rising to a delay occurs in output in the pedal stroke corresponding to the range of the dead band A _1, impairs the accelerator operation feeling.

On the other hand, in order to avoid such a problem, a so-called accelerator full-closed switch type accelerator sensor in which an accelerator full-close switch is incorporated in the accelerator sensor itself coaxially with the sensor lever is known. In this case, in consideration of a case where the sensor lever cannot be properly rotated and returned when the pedal lever is released from being depressed due to a malfunction of the sensor lever operation system, the sensor lever is directly operated by the rotation of the pedal lever when the sensor lever is malfunctioned. It is necessary to additionally provide another accelerator full-close switch for fail-safe use, which is disadvantageous in cost because the accelerator sensor is structurally complicated and requires a plurality of accelerator full-close switches.

Therefore, the present invention can reduce the dead zone of the accelerator sensor as much as possible, improve the accelerator operation feeling, and can advantageously obtain the electronically controlled type. It is intended to provide an accelerator pedal device.

[0007]

According to the first aspect of the present invention, there is provided an accelerator which engages with a pedal lever and detects an amount of depression of the pedal lever as an electric quantity by rotation of a sensor lever interlocked with the pedal lever. In an accelerator pedal device including a sensor and an accelerator full-close switch that is separately provided from the accelerator sensor and detects an initial position of a pedal lever as an accelerator full-close position, the accelerator lever is pressed by the sensor lever. A switch actuating member arranged to oppose the armature and actuating the presser element is provided, and the accelerator fully closed switch is actuated by rotation of the sensor lever.

According to a second aspect of the present invention, the switch operating member according to the first aspect of the present invention is characterized in that the switch operating member includes an adjusting device mounted on the sensor lever and capable of adjusting the amount of protrusion.

According to the invention of claim 3, claims 1 and 2
In the accelerator pedal device described in (1), a fail-safe means capable of operating the presser by the pedal lever when the pedal lever is returned is provided.

According to a fourth aspect of the present invention, the fail-safe means according to the third aspect is interposed between the pusher and the switch operating member and is pushed by the switch operating member, and is one-sided pedal lever. The lever is a pusher operating lever that can be pushed by the lever.

According to a fifth aspect of the present invention, the pusher operating lever according to the fourth aspect is configured such that one end is fixed to the switch body, an intermediate portion elastically contacts the switch operating member, and the other end is engaged with the pedal lever. It is characterized in that it is constituted by a leaf spring piece extended and arranged to a position where it can be fitted.

According to the sixth aspect of the present invention,
The accelerator full-close switch described in (1) is disposed in the vicinity of the free ends of the sensor lever and the pedal lever, and the switch operating member is mounted on the free end of the sensor lever. It is characterized in that it is arranged so as to protrude in the motion trajectory region.

[0013]

According to the first aspect of the present invention, a switch actuating member for actuating a presser of an accelerator fully closed switch is provided on a sensor lever of an accelerator sensor linked to a pedal lever, and the switch is directly operated by the sensor lever. Because the accelerator fully closed switch is activated, even if there is an installation error between the accelerator fully closed switch and the accelerator sensor,
It is easy to adjust the error based on either one of the mounting criteria and to take continuous operation timing between the accelerator fully closed switch and the accelerator sensor. As a result, the dead zone of the accelerator sensor can be reduced as much as possible. Thus, the accelerator operation feeling can be further improved.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention, the adjustment error and the dead zone can be easily adjusted by adjusting the amount of protrusion of the adjustment bolt because the adjustment amount of the adjustment bolt is used as the switch operating member. The quality can be improved.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, even if the returning operation of the sensor lever is delayed as compared with the returning of the pedal lever, the pedal can be used. By the return operation of the lever, the fail-safe means is operated, and the presser of the accelerator fully closed switch can be operated, so that the accelerator opening as desired by the operator can be obtained.

Further, since a fail-safe function can be obtained without using a plurality of accelerator full-close switches, it is possible to obtain a cost advantage.

According to the invention described in claim 4, according to claim 3,
In addition to the effects of the invention, the fail-safe means is constituted by a pusher operating lever pushed by a pedal lever, so that the structure can be simplified.

According to the invention set forth in claim 5, according to claim 4,
In addition to the effects of the invention, the presser operating lever is constituted by a leaf spring piece, an intermediate portion of its length is elastically contacted with the switch operating member, and the free end is extended to a position where it can be engaged with the pedal lever. Since it is disposed, the pressing element can be pressed by the pedal lever together with the pressing element operation by the sensor lever, and the switch operation can be performed more reliably.

According to the sixth aspect of the invention, in addition to the effects of the fourth and fifth aspects, an accelerator full-close switch,
The switch actuating member and the pusher actuating lever are collectively arranged on the free end side of the sensor lever and the pedal lever, which provide a free space in assembling, so that the layout of these components can be freely arranged. In addition to being able to be enlarged, the assembling workability can be improved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a mounting sheet portion 1.
A pedal bracket fastened by bolts and nuts 2 to a vehicle body side member (not shown) such as a dash panel via a is shown, and a pedal lever 3 is joined to the pedal bracket 1 at an intermediate portion of its length. It is rotatably supported via a support shaft 4.

The pedal lever 3 is urged to rotate counterclockwise in FIG. 2 by a return spring 5 mounted around the shaft support of the support shaft 4.
The accelerator pedal is operated by depressing a pedal pad (not shown) attached to the lower end of the pedal, and the pedal lever 3 is provided with a fully-closed stopper 6 provided corresponding to the free end of the upper end.
The fully closed position and the fully open position are regulated by the fully open stopper 7 provided slightly above the shaft support.

Reference numeral 10 denotes an accelerator sensor for detecting the amount of depression of the pedal lever 3 as an electric quantity. The accelerator sensor 10 comprises a mounting bracket 11a provided at the center of the upper and lower surfaces of a cylindrical housing 11, and a pedal bracket. 1
Are fastened and fixed to the sensor mounting sheet portion 1b by bolts and nuts.

The accelerator sensor 10 has a housing 11
A sensor lever 13 is fixed to the end of the detection rotary shaft 12 protruding through the center of one side of the sensor lever.
The sensor lever 13 detects the rotation angle of the pedal lever 3 by converting the rotation angle into an electric quantity. A roller 14 is provided on the detection rotary shaft 12 or the sensor lever 13 so that the roller 14 is connected to the pedal lever 3 by a return spring (not shown).
And the sensor lever 13 is interlocked with the pedal lever 3 to detect the depressed amount of the pedal lever 3 as an electric quantity, thereby detecting an engine (not shown). Outputs a detection signal to the control unit,
The engine control unit controls the throttle valve opening and the fuel injection amount according to the detected value.

The sensor lever 13 includes a fully closed stopper 15 and a fully opened stopper 16 provided on the side wall of the housing 11.
The fully closed position and the fully open position are regulated by the above. However, as shown in FIG.
All the閉規system position S _1, minimum dead band as shown in FIG. 5 by setting an appropriate play stroke ΔS between the total閉規system position S ₂ of the sensor lever 13 due to the fully closed stopper 15 the a ₂ provided, at the extent of carrying lightly foot on the pedal pad, accelerator sensor 10 be the pedal lever 3 is slightly rotated is are not to allow the product to be detected operation.

Reference numeral 20 denotes an accelerator fully-closed switch for detecting the initial position of the pedal lever 3 as the accelerator fully-closed position. The accelerator fully-closed switch 20 is fastened and fixed to the switch mounting seat 1c at the upper end of the pedal bracket 1. The sensor lever 13 and the pedal lever 3 are disposed at positions near the free ends, which are the upper ends thereof.

The accelerator full-close switch 20 has a pusher 21 for turning on (ON) a contact (not shown) facing the free end of the sensor lever 13, and the pusher 21 is pushed to be turned ON. Then, the throttle opening and the fuel injection amount corresponding to the idling operation are controlled via the engine control unit. The free end of the sensor lever 13 opposes the presser 21 and operates the presser 21. A switch operating member 22 is provided.

In this embodiment, the switch operating member 22
The adjusting bolt 22 is screwed onto a bent bolt mounting piece 13 a at the free end of the sensor lever 13, the tip of the adjusting bolt 22 is projected toward the pressing element 21, and is fixed by the lock nut 23. is there.

Further, in relation to the presser 21 and the free ends of the pedal lever 3 and the sensor lever 13, when the pedal lever 3 is returned, the returning operation of the sensor lever 13 is delayed compared to the pedal lever 3. A fail-safe means 24 for operating the presser 21 by the pedal lever 3 when it becomes necessary is provided.

In this embodiment, the fail-safe means 24 is provided by the end of the adjusting bolt 22 and / or
Alternatively, a pusher operating lever composed of a leaf spring piece pushed by the free end of the pedal lever 3 is used.

The pusher operating lever 24 has one end fixed to the switch body 20a, an intermediate portion elastically contacting the end of the adjusting bolt 22, and the other end engaged with the free end of the pedal lever 3. It is extended to the position.

More specifically, the pusher operating lever 24
In the free state, for example, the lifting angle is set to be close to the end of the presser 21 corresponding to the OFF position, and the free end side of the presser operating lever 24 is turned so that the sensor lever 13 is turned immediately before the fully closed stopper 15. When the adjuster 22 returns to the original position and the end of the adjusting bolt 22 elastically contacts the presser operating lever 24 to start pressing the presser 21 as shown in FIG. It is bent at an appropriate angle that can maintain the separated state with a small gap C.

That is, when the pressing lever actuating lever 24 normally releases the pedal depression force and the sensor lever 13 rotates back together with the pedal lever 3, the pressing member operating lever 24 first comes into contact with the sensor lever 13 and comes into contact with the sensor lever 13. When the pusher 21 is pressed integrally to turn on the accelerator fully closed switch 20 and the rotation return of the sensor lever 13 is delayed for some reason, the pedal lever 3 is turned just before the fully closed stopper 6. When the movement is restored, the pedal 21 is elastically contacted with the pedal lever 6 to push the pusher 21 integrally with the pedal lever 6 to turn on the accelerator fully closed switch 20.

According to the configuration of the above embodiment, when the pedal lever 3 is depressed, the pedal lever 3 engages with the roller 14 of the sensor lever 13 with a pedal stroke of ΔS, and the sensor lever 13 interlocks with the pedal lever 3. Then, the accelerator sensor 10 detects the amount of depression of the pedal lever 13 as an electric quantity, and controls the throttle valve opening and the fuel injection amount via an engine control unit (not shown) to thereby control the pedal of ΔS as shown in FIG. to rise the engine output from the dead zone a ₂ strokes in accordance with the depression amount of the pedal lever 3.

When the pedaling force of the pedal lever 3 is released, the sensor lever 13 returns to the rotation of the pedal lever 3 integrally with the pedal lever 3 by its own rotation returning force.
Returns to the initial position, the switch actuating member 22 provided on the sensor lever 13 presses the presser 21 of the accelerator full-close switch 20 to turn on the accelerator full-close switch 20, and the throttle corresponding to the idling operation. Control the valve opening and fuel injection amount.

Here, as described above, the sensor lever 13 of the accelerator sensor 10 linked to the pedal lever 3 is provided with a switch actuating member 22 for actuating the presser 21 of the accelerator fully closed switch 20, and is directly operated by the sensor lever 13. The accelerator full-close switch 20 is actuated in advance, so that the accelerator full-close switch 20 and the accelerator sensor 1
Even if there is a mounting error of 0, it is easy to adjust the error with one of them as a mounting reference to make continuous operation timing between the accelerator full-close switch 20 and the accelerator sensor 10 easy. it is possible to set small dead zone a ₂ to a minimum corresponding to the pedal stroke ΔS as described above, it is possible to further improve the accelerator operation feeling.

In particular, according to the present embodiment, since the adjusting bolt whose projecting amount is adjustable is used as the switch operating member 22, the adjustment of the mounting error and the adjustment of the dead zone are performed by adjusting the projecting amount of the adjusting bolt 22. Can be easily performed, and the quality can be improved.

If the return operation of the sensor lever 13 is delayed when the pedaling force of the pedal lever 3 is released, the pressing lever operating lever 24 provided as a fail-safe means is pushed by the pedal lever 3 to release the accelerator pedal. By pressing the pusher 21 of the close switch 20, the operation can be quickly returned to the idling operation, and the operation desired by the operator can be secured. In addition, a fail-safe operation can be performed without using a plurality of accelerator full-close switches. Since the function can be obtained, it can be advantageously obtained in terms of cost.

In particular, since the fail-safe means is constituted by the pusher operating lever 24 which is pushed by the pedal lever 3 as described above, the structure can be simplified and the cost can be greatly reduced. And
The presser operating lever 24 is constituted by a leaf spring piece, an intermediate portion of its length is elastically contacted with the end of the adjustment bolt 22, and its free end is extended and arranged at a position where it can engage with the pedal lever 3. Therefore, in the normal state, the operation of the presser 21 by the sensor lever 13 has priority, and when the return operation of the sensor lever 13 is delayed, the operation switching in which the presser 21 is pressed by the pedal lever 3 can be smoothly performed. it can.

Further, the accelerator full-close switch 20,
Adjustment bolt 22 and presser operating lever 24
Are collectively arranged on the free end side of the sensor lever 13 and the pedal lever 3 which can provide a free space in assembling, so that the degree of freedom of arrangement layout of these components can be increased and the assembling work can be performed. Performance can be improved.

The assembly of the accelerator pedal device is based on the pedal lever 3 contacting the fully closed stopper 6 of the pedal bracket 1 with the accelerator fully closed switch 2
0 is attached to the pedal bracket 1 so that the presser operating lever 24 is pressed by the pedal lever 3, and the accelerator sensor 10 is connected to the accelerator lever 13.
Stroke Δ between the roller 14 and the pedal lever 3
S is attached to the pedal bracket 1, and then the protrusion is adjusted so that the tip of the adjusting bolt 22, which is a switch operating member, contacts the intermediate portion of the presser operating lever 24. It is possible to easily adjust the error due to the variation at the time, and it is possible to greatly improve the workability of the error adjustment and the assembly.

[Brief description of the drawings]

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

FIG. 2 is a side view of one embodiment of the present invention.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is an explanatory diagram showing an operation process of an accelerator full-close switch.

FIG. 5 is an operation characteristic diagram of the accelerator fully closed switch and the accelerator sensor according to the embodiment of the present invention.

FIG. 6 is an operation characteristic diagram of an accelerator fully closed switch and an accelerator sensor in a conventional structure.

[Explanation of symbols]

 Reference Signs List 3 pedal lever 10 accelerator sensor 13 sensor lever 20 accelerator full-close switch 21 presser 22 switch operating member (adjustment bolt) 24 fail safe means (pressor operating lever)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kyoichi Inoue 2028 Washizu, Kosai-shi, Shizuoka Fuji Kiko Co., Ltd. 72) Inventor Yoshihiro Kawahara 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture, Nissan Auto Co., Ltd. EA08 EB01 EB02 EB16 EB25 3G065 CA21 JA04 JA09 JA11 JA14 3J070 AA32 BA11 CA47 DA02

Claims (6)

[Claims] An accelerator sensor that engages with a pedal lever and detects the amount of depression of the pedal lever as an electric quantity by the rotation of a sensor lever that interlocks with the pedal lever, and a pedal that is provided separately from the accelerator sensor. An accelerator full-close switch that detects an initial position of the lever as an accelerator full-close position;
The sensor lever is provided with a switch actuating member that is arranged to face the presser of the accelerator full-close switch and operates the presser, and the accelerator full-close switch is operated by rotation of the sensor lever. Accelerator pedal device. 2. The accelerator pedal device according to claim 1, wherein the switch actuating member is provided with an adjusting device mounted on the sensor lever and having an adjustable amount of protrusion. 3. The accelerator pedal device according to claim 1, further comprising a fail-safe means capable of operating said presser by the pedal lever when the pedal lever is returned. 4. The fail-safe means is a pusher operating lever interposed between the pusher and the switch operating member and pushed by the switch operating member and pushable by a pedal lever. The accelerator pedal device according to claim 3, wherein 5. The pressing member operating lever is a plate spring piece extending at a position where one end is fixed to the switch body, an intermediate portion elastically contacts the switch operating member, and the other end extends to a position where it can engage with the pedal lever. The accelerator pedal device according to claim 4, wherein the accelerator pedal device is configured. 6. The accelerator full-close switch is disposed near the free ends of the sensor lever and the pedal lever, and the switch operating member is mounted on the free end of the sensor lever, while the pusher operating lever is connected to the free end of the pedal lever. The accelerator pedal device according to claim 4, wherein the accelerator pedal device is arranged so as to protrude in a rotation locus region of the accelerator pedal.