JPS59190440A - Accelerator controller for vehicle - Google Patents

Abstract

PURPOSE:To improve reliability of control mechanism by providing a mechanical engaging chip for closing a throttle valve to initial position while interlocking with reset operation of an accelerator operator onto a throttle valve control mechanism for driving a servo motor. CONSTITUTION:Stepping amount of an accelerator pedal is detected as an electric signal to drive a servo motor 6 thus to control opening/closing of a throttle valve 5. In such a remote control accelerator controller, an opening indication chip 10 is fixed at the leading edge of a valve shaft 8 while a valve opening limiting chip 13 is secured to a lever 12 integral with a boss 9 inserted rotatably over the shaft 8. The lever 12 is coupled with an accelerator wire 15 while energized in closing direction of throttle valve by means of a spring 14 of first lever 11. Consequently upon fault of the motor 6, returning of accelerator will cause engagement between the limiting chip 13 and the indication chip 10 to close the throttle valve 5 forcefully.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a method for controlling the opening of the valves 1 to 1 through an electric or fluid drive system based on the displacement m of an accelerator operator. Regarding a vehicle accelerator control device that is controlled remotely, even if an abnormality occurs in the drive system between the accelerator operator and the throttle valve, the throttle control will be activated in conjunction with the return operation of the accelerator operator. The present invention relates to an accelerator control device for a vehicle in which a 1-wheel valve is reliably closed to a predetermined position.

(Prior art and its problems) As is well known, in white cars, the accelerator pedal and throttle valve are directly connected mechanically by wires, links, etc.
It is configured such that the opening degree of the throttle valve is uniquely determined by the amount of depression (displacement amount, stroke) of the accelerator pedal.

In this mechanical accelerator system, the rate of change of the thrower valve opening degree relative to the displacement of the accelerator pedal (a) is set to be large in order to obtain a good acceleration feeling that accelerates rapidly with a slight depression of the accelerator pedal. It becomes difficult to finely control the speed when driving at a constant speed.

On the contrary, we place emphasis on the rollability of fine control 1 during constant speed driving,
If the rate of change in the opening of the thrower valve relative to the amount of displacement of the accelerator pedal is set to a small value, the feeling of acceleration in response to pedal operation will deteriorate.

As described above, with conventional mechanical accelerator operators, it has been difficult to achieve characteristics that make the vehicle easy to drive under all driving conditions.

Therefore, the present applicant has previously proposed that, based on the amount of displacement of the accelerator pedal, through electrical or fluid control and drive system,
Application for a vehicle accelerator control device in which the opening degree of the thrower 1 heel valve is remotely controlled (Patent application No. 57-182066)
)are doing.

According to such vehicle accelerator control 'JAM, the transfer function of the electrical control system or the fluid control system is set to a desired function, or a plurality of transfer functions are provided, and the operating amount of the accelerator operator or By appropriately selecting these according to the operating speed, it is possible to always obtain acceleration characteristics suitable for R under a wide range of driving conditions.

However, in such an electro-hydraulic controlled vehicle accelerator control device, there are various position detection elements (for example, displacement detection of the accelerator operator) between the accelerator operator and the thrower valve. vessel.

In addition to the existence of electronic signal transmission systems and fluid control systems (such as valve opening degree detectors, etc.), there are also errors associated with temperature or aging, etc. The accelerator controller must be completely restored! - to state a
3, there is a risk that the throttle valve opening may not close to a predetermined initial opening (for example, the idle position).

(Objective of the Invention) This invention's ``1.'': 1. In the above-mentioned remote-controlled vehicle accelerator control device, if any abnormality occurs in the control system from the accelerator operator to the throttle valve, Even in such a case, the purpose is to ensure that the throttle valve closes at the initial position jζ1 in conjunction with the return operation of the accelerator operator.

(Structure of the Invention) The present invention provides a remote control type accelerator control device for a vehicle as described above, which mechanically interlocks with the opening/closing operation of the thrower valve to move the valve in a predetermined opening direction and closing direction on a constant trajectory. A valve opening indicator piece that moves back and forth, and a horn that is located on the opposite side of the valve opening indicator piece and is sufficiently stronger than the thrower 1 hell valve driving force force the valve in the closing direction. , a valve opening regulation that mechanically interlocks with the acceleration/deceleration operation of the accelerator operator and always moves the valve opening indicator piece to an allowable position determined in accordance with the amount of displacement of the accelerator operator at the relevant point in time; (1) and the valve opening degree is displayed while the valve opening degree regulating piece is moved in the opening direction by the force of the spring in conjunction with the return operation of the accelerator operator) and pressed to 1. The thrower valve is forcibly closed to a predetermined position by the leakage.

(Description of Embodiments) FIG. 1 is a block diagram, without showing the electrical <>M4 configuration, of a vehicle accelerator control device according to the present invention. In the figure, the accelerator depression of the accelerator pedal (accelerator operator) 1 (to the pedals 1) is converted to an analog voltage corresponding to the pedal stroke via the pedal potentiometer 2. be done.

The control signal generator 3 includes an A/D converter 31 that converts the output voltage of the pedal potentiometer 2 into Δ, / [), and this A/D
A microcombi coater 32 that performs predetermined calculations based on the output of the converter 31, and this microcomputer 32.
and a D/A converter 33 which performs D/A conversion on the output of the D/A converter 33.

A table is set in the microcomputer 32 that represents the relationship between the accelerator pedal stroke and the throttle valve hearing, such as curve a shown by the solid line in the graph of FIG. 2, and by referring to this table,
In the micro combination coater 32, the pedal potentiometer 2.
The 110 degree angle of the pedal stroke detected via the A/D converter 31 is determined by calculation, and this is calculated via the A/D converter 33. Output to /<4.

1 No small motor driver 4, the size shown in Fig. 3 is 1/J]
1111 of the small throttle valve 6 for controlling the rotation of the throttle valve 5. and the ID of the throttle valve opening output from the control signal light part 3.
Regarding the deviation from f'j, a current for correcting this deviation is output to the lever controller (5), thereby positioning the throttle valve 5 to the target valve opening position. Ru,.

On the other hand, as shown in FIG. A valve opening degree display piece 1 is attached to the tip of the rotating shaft 8 so as to rotate together with the shaft B.
0 or fixed.

Further, a first lever 11 and a fan-shaped second lever 12 are integrally protruded from the boss 9 in the radially outward directions I' and j, respectively, and the second lever 12 at the mouth A valve opening degree regulating piece 13 is fixed to the valve opening degree indicating piece 10 so as to come into contact with the valve opening degree indicating piece 10 .

Therefore, the valve opening degree display piece 10 moves in a circular orbit in a predetermined opening direction (indicated by arrow B) and in the opening direction (not indicated by arrow) in mechanically interlocked with the closing operation of the thrower 1 hell valve 5. It is designed to rotate back and forth.

Further, one end of a tension spring 14, which is sufficiently stronger than the driving force of the servo motor 6, is fixed to the first lever 11, and the second lever 12 has a tension spring 14 fixed thereto, as shown in FIG.
One end 15a of the accelerator wire 15 is fixed, and the accelerator wire 15 is made to run along a kite member (not shown) formed in an arc shape near the outer periphery of the second lever 12 as shown by the dotted line in the figure. The other end is connected to the accelerator barrel 1.

Therefore, the valve opening regulating piece 13 is located on the opening direction side (arrow B) than the valve opening indicating piece 10, is supported so as to be able to reciprocate around the shaft 8 while drawing a circular trajectory, and is supported by the thrower 1
- in the opening direction (arrow A) (=J9A) via a spring 14 that is sufficiently stronger than the valve driving force, and is mechanically linked to the acceleration/deceleration operation of the accelerator pedal 1, so that the The valve opening indicator piece is set to move to the permissible position indicated by the curve J in FIG.

In Figures 3 and 4, 16 is
There is an intake path in which a throttle valve 5 is disposed.

In the above configuration, when the accelerator pedal 1 is depressed, the accelerator wire 15 is pulled and the second lever 12 is rotated in the opening direction (arrow Δ). Here, as mentioned above, the accelerator 1 noise A7.15 is the second lever 1
As shown in FIG. 2, the valve opening regulating piece 13 is curved along the curve 1) of the accelerator pedal 1 as shown in FIG. As shown in the figure, the rotational position of iJ and the core wire proportionality change greatly in response to changes in the pedal stroke in areas where the pedal stroke is small, and change small in areas where the pedal stroke is large.

When the accelerator pedal 1 is depressed, the value of the throttle valve target opening increases almost in a figure 8 pattern as shown by curve a in Fig. 2, and in this case, the control system As long as the throttle valve is operating normally, the target opening of the throttle valve will not exceed the opening regulated by the valve opening regulating piece 13.

In other words, if all the remote control systems from the accelerator pedal 1 to the throttle valve 5 operate normally, the output of the throttle valves 1 to 5 will be the same as that of the accelerator pedal 1, according to the relationship shown in curve a in FIG. It is controlled according to the changed position and does not cause any trouble.

On the other hand, due to an abnormality in the pedal potentiometer 2, the valve opening potentiometer 7, or the like, or an abnormality in the servo motor 6 itself, for example, as shown in FIG. Assume that the listening level is fixed at 1-1.

In this situation, the loaf A1 is applied to the accelerator pedal 1.
Corresponding to this, the position of the valve opening regulating piece 13 is exactly d,
When the accelerator pedal 4 is returned from this state, the opening position of the valve opening regulating piece 13 is T when the accelerator pedal 4 returns from Betasis 1 to Low or A1 to Δ;. The actual throttle valve opening and the position of the valve opening regulating piece 13 match, and thereafter the valve opening regulating piece 13 is moved from the position of the valve opening indicating piece 10 by the horn of the spring 14. This forces the throttle valve 5 to close to a predetermined initial time, thereby preventing the throttle valve 5 from closing too quickly.

Note that the initial opening degrees of the throttle valves 1 to 5 mentioned above may be, for example, the opening degrees corresponding to the idling state, or even if the intake pipe/816 is completely closed. good.

Thus, according to this embodiment, the accelerator pedal 1
Even if a problem occurs in the remote control system from the throttle valve 1 to the throttle valve 5, as long as the accelerator pedal is operated to return, the throttle valves 1 to 5 will be reliably forcibly closed to the predetermined initial opening degree. As a result, the reliability of this type of vehicle accelerator control device can be significantly improved.

B.5. In the above embodiment, a piece that rotates together with the rotation shaft 8 of the throttle valve 5 is used as the valve opening degree display piece 10, and a piece that rotates around the rotation axis 8 as the valve opening degree regulating piece 13 is adopted. Although the structure of the valve opening regulating piece J3 and the valve opening indicating piece is shown as being fixed to the lever 12 that moves 1-, the structure is not limited to this.

In short, the valve opening degree display piece may be any piece that reciprocates in a predetermined opening direction and closing direction on a fixed trajectory in mechanical interlock with the opening/closing operation of the throttle valve.

The valve opening regulating piece is located on the opening direction side of the valve opening indicating piece, is supported so as to be able to reciprocate on the trajectory, and is supported by a spring that is sufficiently stronger than the throttle valve driving force. (=1 force) in the closing direction (=1), and is mechanically linked with the f)O deceleration operation of the accelerator operator, and is always determined by 1 corresponding to the displacement amount of the accelerator operator at the time. Any structure may be used as long as the valve opening indicator piece can be moved to the permissible position.

Further, in the embodiment described above, the small motor 6 is shown as the throttle valve driving means, but the present invention is not limited to this, and various driving mechanisms such as a stepping motor or an acticoator may be used. 1 Also, in the above embodiment,
Although the accelerator pedal is shown as the accelerator operator, it is not limited to the pedal, and it goes without saying that various operators can be used depending on the type of vehicle.

Further, in the embodiment, the second
One type of characteristic shown in curve a in the figure is set.[Although the microcomputer 32 is shown, the function between the accelerator peg system 1-○- and the throttle valve opening is limited to this, and various other functions can also be set. It goes without saying that a curve may be set, and that the number of types is not limited to one, but may be selected as appropriate depending on the accelerator pedal stroke J3, its rate of change, etc.

(Effects of the Invention) As is clear from the description of the embodiments above, according to the present invention, the throttle valves 1 to 1 are controlled via an electrical or fluid control system based on the amount of displacement of the accelerator operator. J) At a remote-driven vehicle knock cell control device,
Even if an abnormality occurs in the control system from the accelerator operator to the throttle valves, the throttle valve must be forcibly closed to the initial +11J position in response to the return operation of the accelerator operator. This can significantly improve the reliability of this type of device.

[Brief explanation of the drawing]

Fig. 1 is a plotter diagram showing the electrical configuration of the device of the present invention, Fig. 2 is a graph showing the relationship between the accelerator pedal stroke, the throttle valve opening J, and the valve opening regulation position. The figure is a perspective view showing the basic structure of the valve opening regulating piece J3 and the valve opening indicating piece, and FIG. 4 is a side view of the device shown in FIG. 3. 1...Accelerator pedal 2...Pedal potentiometer 3...Control signal generator 4...Servo motor driver 5...Thrower 1-le Valve 6... Servo motor 7... Valve open IK body position ε3... Rotating shaft 9... Boss 10... Valve opening degree display j1 11...・First lever 12...Second lever 13...Valve opening regulating piece 1/4...Tension spring 15...Accelerator wife 16...Suction pipe Patent applicant Nissan Motor Co., Ltd. Co., Ltd.

Claims (1)

[Claims] <1)! 5 Throttle valve driving means for opening and closing the throttle valves 1 to 1 to achieve the saw valve opening in accordance with the received control signal, etc.: Accelerator displacement detection r for detecting the displacement of the accelerator operator. a control signal generating means for outputting a control signal for the throttle valve opening corresponding to the output of the accelerator displacement amount detecting means and applying the control signal to the throttle valve driving means; A valve opening display J' that is mechanically interlocked with the opening/closing operation of the valve and moves back and forth in a predetermined closing direction and closing direction on a constant trajectory C! 1; When the valve is located on the closing direction side of the valve wholesaler display piece and is forced in the closing direction by a force sufficiently stronger than the valve driving force, (mechanically interlocked with the acceleration/deceleration operation of the accelerator operator), the valve opening indicator piece moves to the permissible position determined in accordance with the amount of displacement of the accelerator operator at the relevant point. A vehicle accelerator control device comprising a valve opening regulating piece.