JP3835294B2 - Accelerator position detector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for detecting an accelerator opening of an automobile or the like.
[0002]
[Prior art]
In an automobile or the like that detects the accelerator opening operated by the accelerator pedal and controls the throttle opening of the engine based on the detected value, it is necessary to correctly detect the accelerator opening. It has become common to learn the fully closed position (see JP 2001-254636 A).
[0003]
[Problems to be solved by the invention]
However, when a kick-up operation is performed in which the accelerator pedal is operated in the opposite direction from the fully closed position when the accelerator pedal is opened, the sensor is protected when the fully closed position stopper located at a position away from the sensor is elastically deformed. Learns an opening position smaller than that at the time of opening the accelerator as a fully closed position, and the detected value of the accelerator opening thereafter becomes a larger value than the actual accelerator opening. Due to this error, the throttle opening is controlled to be large, and the engine output during idling may become excessive.
[0004]
The present invention has been made paying attention to such a conventional problem, and it is an object of the present invention to provide an accelerator opening detection device capable of obtaining a correct detection value even when operated in the reverse direction from the accelerator opening position. And
[0005]
[Means for Solving the Problems]
For this reason, the invention according to claim 1
A device for detecting an accelerator opening operated by an accelerator operating device,
A displacement sensor that converts the displacement of the accelerator operating device into an accelerator opening signal;
Only during normal operation on the side where the accelerator opening is larger than the open position of the accelerator operating device, the member that is directly operated by the accelerator is engaged with the member whose displacement is detected by the displacement sensor, and the direct accelerator operation is performed. When an operation on the side where the accelerator opening is smaller than the open position is performed while the operating force acting in the direction of increasing the accelerator opening is transmitted from the member to the member whose displacement is detected by the displacement sensor, the direct Canceling the input of the displacement of the accelerator operating device to the displacement sensor by not transmitting the operating force in the opposite direction to the normal operation from the member operated by the accelerator to the member whose displacement is detected by the displacement sensor An input cancellation mechanism composed of a one-way mechanism ,
It is characterized by including.
[0006]
According to the invention of claim 1,
During normal operation on the side where the accelerator opening is larger than the opening position of the accelerator operating device, the operating force is transmitted to the member whose displacement is detected by the displacement sensor.
On the other hand, the displacement sensor detects the displacement of the operating force in the direction opposite to that during normal operation, such as when the accelerator pedal is operated on the side where the accelerator opening is smaller than the open position, such as when the accelerator pedal is kicked up. Since it is not transmitted to the member, the input to the displacement sensor of the displacement of the accelerator operating device by the operation is canceled.
In other words, even if a displacement occurs between a member that is directly operated by the accelerator pedal and a member that is detected by the operation amount sensor due to a kick-up operation of the accelerator pedal or the like, the operation force is required until the member is returned to the accelerator release position. Is not transmitted, and the operating force is transmitted after the accelerator opening starts to increase from the accelerator open position.
From the above, it is possible to prevent erroneous learning of the fully closed position of the accelerator based on displacement such as when the accelerator pedal is lifted up, to ensure the correct accelerator opening detection value, and to prevent excessive engine output during idling. it can.
[0011]
The invention according to claim 2
It includes a reverse displacement restricting mechanism for restricting a reverse displacement that decreases the accelerator opening from the open position of the accelerator operating device.
According to the invention of claim 2 ,
When the accelerator is operated in the opposite direction to that during normal operation, the movement of the member that is directly operated by the one-way mechanism in the direction of decreasing the accelerator opening is free. Can be regulated by.
[0012]
The invention according to claim 3
When the accelerator operating device is operated in the reverse direction to decrease the accelerator opening from the open position, the reverse canceling mechanism by the reverse displacement restricting mechanism is provided after the function to cancel the input to the displacement sensor by the input canceling mechanism occurs. It is configured so as to have a function of regulating the displacement in the direction.
[0013]
According to the invention of claim 3 ,
When the accelerator is operated in the opposite direction to that during normal operation, even if the reverse displacement restricting mechanism (stopper) is deformed by the member that is directly operated by the accelerator, the input cancellation mechanism cancels the input to the displacement sensor before that. Therefore, it is possible to prevent the displacement due to the deformation from being detected.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an outline of an engine control system provided with an accelerator opening detection device according to the present invention. An accelerator opening signal from an accelerator opening detecting device 2 attached to an accelerator pedal 1 serving as an accelerator operating device is input to the engine control unit 3. The engine control unit 3 inputs the power supply voltage of the battery 4 via the ignition switch 5.
[0015]
The engine 7 and the transmission 8 are controlled by control signals from the engine control unit 3 and a separately installed transmission control unit 6.
2 and 3 show details of the accelerator pedal 1 and the accelerator opening detecting device 2. FIG.
[0016]
The upper end of the lever 12 having the pedal body 11 fixed to the lower end is fixed to the outer peripheral wall of the cylindrical outer rotary shaft 14 protruding from the detector case 13. The outer rotating shaft 14 is fitted and inserted through a one-way bearing 16 on the outer side of the inner rotating shaft 15 that is pivotally supported by the detector case 13. The one-way bearing 16 functions as a one-way mechanism that transmits the rotational force of the outer rotating shaft 14 in the direction of increasing the accelerator opening to the inner rotating shaft 15 but does not transmit the rotating force in the direction of decreasing the accelerator opening.
[0017]
The inner rotary shaft 15 has a movable contact 17 fixed to an end in the detector case 13, and an outer end of the movable contact 17 slides with an arc-shaped fixed contact 18 fixed in the detector case 13. Thus, a rotary displacement sensor is configured.
In addition, a stopper plate 19 is fixed to an intermediate portion of the inner rotating shaft 15, and the inner rotating shaft 15 reduces the accelerator opening by a coil spring 20 mounted between the stopper plate 19 and the detector case 13 wall. When the accelerator is released, the stopper plate 19 is engaged with a fully closed position restricting stopper 21 fixed to the inner wall of the detector case 13 and maintained at the fully closed position. Further, a stopper 22 for restricting the fully open position is fixed to the inner wall of the detector case 13 on the side facing the stopper 21 for restricting the fully closed position, and the accelerator fully open position is restricted at a position where the stopper plate 19 abuts against the stopper 22. The
[0018]
Further, a stopper 23 serving as a reverse displacement restricting mechanism that is engaged with the lever 12 in an accelerator open state and restricts a reverse displacement due to a kick-up operation from the accelerator open position is fixed to the bottom wall of the detector case 13. . Here, the stopper plate 19 contacts the stopper 21 for restricting the fully closed position before the lever 12 contacts the stopper 23 so that the fully closed position is not learned by the elastic deformation of the stopper 23 during the kicking operation. I have to.
[0019]
FIG. 4 shows a functional configuration of the present embodiment.
With this configuration, when the accelerator pedal 1 is depressed, the inner rotary shaft 15 rotates via the pedal body 11, the lever 12, the outer rotary shaft 14, and the one-way bearing 16, and the amount of rotation of the inner rotary shaft 15 is increased. (Displacement) is detected as the accelerator opening by the contact position between the movable contact 17 and the fixed contact 18. Even when the accelerator pedal 1 is fully closed (opened), the direction of the operating force does not change, so that the operating force is transmitted to the inner rotary shaft 15 via the one-way bearing 16 and the biasing force ( By the reaction force, the inner rotary shaft 15 rotates following the outer rotary shaft 14.
[0020]
When the accelerator pedal 1 is kicked up in the reverse direction from the fully closed position, the lever 12 hits the stopper 23 and is regulated. Here, the operating force in the reverse direction is not transmitted to the inner rotary shaft 15 by the function of the one-way bearing 16, so that the stopper plate 19 can be moved by the coil spring 20 without elastically deforming the stopper 21 for restricting the fully closed position. The fully closed position is correctly learned at the position where the stopper 21 is in contact with only the urging force. Accordingly, it is possible to prevent the engine speed at the time of idling from becoming excessive and the rotation speed from rising excessively.
[0021]
Next, a second embodiment will be described. In the first embodiment, the function of the one-way bearing 16 can prevent transmission of the kicking operation force to the inner rotary shaft 15, but before the lever 12 is regulated by the reverse displacement regulating stopper 23, the plate 19 Is in contact with the stopper 21 for restricting the fully closed position, the outer rotary shaft 14 and the inner rotary shaft 15 may rotate relative to each other during a kick-up operation (the amount of play of the one-way bearing is to some extent). Can absorb). In the case of relative rotation, when the operation is repeated, the inner rotary shaft 15 approaches the fully open direction. Therefore, in the second embodiment, as shown in FIGS. 5 and 6, such a situation is reliably prevented. The configuration.
[0022]
That is, instead of the one-way bearing 16 in the first embodiment, an engagement groove 14a is formed on the outer rotation shaft 14, and an engagement protrusion 15a that fits in the engagement groove 14a is provided on the inner rotation shaft 15.
Here, for the accelerator depression operation from the accelerator fully closed position, the end wall of the engagement groove 14a is engaged with the engagement protrusion 15a , and the inner rotation shaft 15 rotates in conjunction with the rotation of the outer rotation shaft 14. Although the operation is performed, the engagement groove 14a and the engagement protrusion 15a are disengaged with respect to the operation in the reverse direction due to the kick-up of the accelerator pedal, and the rotation of the outer rotation shaft 14 is not transmitted to the inner rotation shaft 15. In this way, the rotational positions of the engaging groove 14a and the engaging protrusion 15a are set.
[0023]
In this way, the rotational position shift between the outer rotating shaft 14 and the inner rotating shaft 15 due to the kicking-up operation is eliminated during the accelerator depression operation, and the above problem can be avoided.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of an engine control system provided with an accelerator opening detection device according to the present invention.
FIG. 2 is a side cross-sectional view of the first embodiment of the present invention.
FIG. 3 is a front sectional view of the first embodiment.
FIG. 4 is a diagram showing functions of the first embodiment.
The flowchart which shows the main routine of control in the starting control apparatus same as the above.
FIG. 5 is a perspective view of a second embodiment.
FIG. 6 is an enlarged sectional view of a main part of a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Accelerator pedal 2 Accelerator opening degree detection apparatus 11 Pedal main body 12 Lever 13 Detector case 14 Outer rotating shaft 14a Engaging groove 15 Inner rotating shaft 15a Engaging protrusion 16 One-way bearing 17 Movable contact 18 Fixed contact 19 Stopper plate 20 Coil spring 21 Stopper 23 for restricting the fully closed position Stopper for restricting the reverse displacement

Claims (3)

A device for detecting an accelerator opening operated by an accelerator operating device,
A displacement sensor that converts the displacement of the accelerator operating device into an accelerator opening signal;
Only during normal operation on the side where the accelerator opening is larger than the open position of the accelerator operating device, the member that is directly operated by the accelerator is engaged with the member whose displacement is detected by the displacement sensor, and the direct accelerator operation is performed. When an operation on the side where the accelerator opening is smaller than the open position is performed while the operating force acting in the direction of increasing the accelerator opening is transmitted from the member to the member whose displacement is detected by the displacement sensor, the direct Canceling the input of the displacement of the accelerator operating device to the displacement sensor by not transmitting the operating force in the opposite direction to the normal operation from the member operated by the accelerator to the member whose displacement is detected by the displacement sensor An input cancellation mechanism composed of a one-way mechanism ,
An accelerator opening detection device comprising: 2. The accelerator opening detection device according to claim 1 , further comprising a reverse displacement restricting mechanism for restricting a reverse displacement that decreases the accelerator opening from an open position of the accelerator operating device. When the accelerator operating device is operated in the reverse direction to decrease the accelerator opening from the open position, the reverse canceling mechanism by the reverse displacement restricting mechanism is provided after the function to cancel the input to the displacement sensor by the input canceling mechanism occurs. The accelerator opening detection device according to claim 2 , wherein a function of regulating displacement in a direction is generated.

Images