JPH01227825A - Throttle valve control device for engine - Google Patents

Abstract

PURPOSE:To make the running of a vehicle possible even in the case where a motor is out of order by attaching a pulley to a throttle valve shaft through an arm to energize the shaft in a valve closing direction, and connecting one end of a cable engaged around the pulley to an accelerator pedal and its other end to a motor-driven pulley respectively. CONSTITUTION:An arm 4 is seesawingly attached onto the valve stem 3 of a throttle valve 2, and a pin 5 rotatably supports a pulley 7 at one end of the arm 4, and a return spring 6 is attached to the other end of the arm 4 to energize the valve 2 in its closing direction. A cable 8 is engaged in the groove of the pulley 7, and connected through a pin 9 to a pulley 10 at its one end and to an accelerator pedal 11 at its other end. The output shaft of a motor 17 is connected through an electromagnetic clutch 16 to the rotating shaft 15 of the pulley 10. An electric control device 27 controls the motor 17 according to the operating state of an engine, and in the case where the motor 17 has got out of order, turns off the electromagnetic clutch 16 to cut off the motor 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a throttle valve control device for an automobile engine that controls the throttle valve of the engine by electronic control.

[Conventional technology]

Recently, with the aim of improving the driving feeling and running performance of automobiles, the connection between the accelerator pedal and the throttle valve has been changed from the conventional mechanical connection using a wire cable, to the use of an electronic device interposed between the accelerator pedal and the throttle valve. ,
Development is progressing on a device that opens and closes a throttle valve by taking into consideration the engine operating state and vehicle driving state in addition to the amount of accelerator pedal depression. This device requires many types of driving information sensors, including an accelerator depression amount detection sensor9, as well as an actuator to operate the throttle valve, and further processes signals from each sensor and inputs them to the actuator. This requires an electronic control device to control the system, which is more complicated than the conventional wire cable-only system, so ensuring reliability is important. In other words, it is essential to have a so-called fail-safe mechanism that prevents the vehicle from running out of control due to failure of the above-mentioned device, or from situations where the throttle valve suddenly closes during high-speed driving and sudden braking is applied. As this type of fail-safe mechanism, one has been proposed in which a return spring is attached to the throttle valve shaft to return the throttle valve to the closed position in the event of a failure.

[Problem to be solved by the invention]

However, with the conventional device described above, although it is possible to prevent the vehicle from running out of control when the actuator becomes inoperable, it is not possible to maintain the vehicle running, and therefore, it is necessary to move the vehicle to a predetermined location for repair. There are problems such as not being able to do so, or sudden braking when driving at high speeds, putting you at risk of being rear-ended by a car behind you.

This invention was made to solve the above-mentioned problems, and it enables the vehicle to run even if the motor becomes inoperable, prevents sudden braking of the vehicle, and also prevents the vehicle from suddenly braking when starting or accelerating. Traction 1 reduces engine torque by reducing throttle opening when drive wheel slip occurs.
It is an object of the present invention to provide a throttle valve control device for an engine that can be used as a device for reducing throttle valve opening during gear shifting in order to prevent engine throttle or slicking during gear shifting in an automatic transmission.

[Means to solve the problem]

The throttle valve control device according to the present invention supports a pulley on the valve shaft of the throttle valve via an arm biased in a direction to close the throttle valve, and connects one end of a wire cable wound around the pulley to an accelerator pedal. , the other end is connected to a pulley rotationally driven by a motor, and the pulley and the motor are connected via an electromagnetic clutch.

[For production]

In this invention, the throttle valve is normally opened and closed directly by the accelerator pedal using a wire cable, and quickly follows the rapid movement of the accelerator pedal. When it is necessary to reduce the throttle valve opening in opposition to the accelerator pedal operation, such as during transmission control or automatic transmission gear shifting, the motor drives the second pulley to reach the target throttle valve opening. controlled. Additionally, in the event of a motor failure, the throttle valve can be opened and closed simply by operating the accelerator pedal.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
2 is a sectional view taken along the line 1--2 of FIG. 1, and FIG. In the figure, 1 is an air intake pipe of an engine (not shown), and 2 is a throttle valve that is supported by a valve shaft 3 and opens and closes within this air intake v:l.

Reference numeral 4 denotes an arm attached to the valve shaft 3 in a sealing manner, and a pulley 7 is rotatably supported by a pin 5 attached to the lower end of the arm. A return spring 6 is hung on the other end of the arm 4, and this spring 6 applies a biasing force to the valve shaft 3 in the direction of returning the throttle valve 2 to the closed position. Reference numeral 8 denotes a wire cable that is routed around the groove of the pulley 7. One end of the cable 8 is connected to a pulley 10 via a pin 9, and the other end is connected to an accelerator pedal 11 operated by the driver. has been done.

12 is a return spring for the accelerator pedal 11, 13
14 is an accelerator pedal stopper, and 14 is an accelerator sensor that detects the amount of operation of the accelerator pedal. Reference numeral 15 denotes a rotating shaft of the boolean IJ 10, which is also rotationally driven by a motor 17 via an electromagnetic clutch 16. This electromagnetic clutch 1
6, when the power is turned off, the rotational force of the motor 17 is transferred to the rotation shaft 15.
It will not be communicated to. 18 is a rotation angle sensor that detects the amount of 100 rotations of the pulley, and 19 is a lever fixed to the rotating shaft 15.

In Fig. 3, reference numerals 20 and 21 indicate a pair of return springs made of leaf springs. When the lever 9 rotates counterclockwise, the return spring 20 deforms as shown by the chain line, and when the lever rotates clockwise, the return spring 21 deforms. A torque is applied to each lever 19 in the direction of spring deformation and return to the set position Iff (solid line position 1ff) where both return springs 20 and 21 act equally. Reference numerals 22 and 23 are stoppers for the return springs 20 and 21.

24 is a throttle opening sensor that detects the opening of the throttle valve 2, 25 is a stopper of the arm 4 that determines the fully closed position of the throttle valve 2, and 26 is a sensor that detects the operating state of the engine (for example, the speed change of an automatic transmission with a rotation speed of N1). This is a sensor that detects the timing T) and the operation state of the vehicle (for example, brake operation B). 27 is an accelerator sensor 14, a rotation angle sensor 18,
It inputs the output signals of the throttle opening sensor 24 and the sensor 26, performs predetermined arithmetic processing in response to these input information, drives the motor 17, and controls the on/off of the electromagnetic clutch 16. It is an electronic control device that

Next, the operation will be explained. When the driver depresses the accelerator pedal 11, the wire cable 8 is pulled in the direction of arrow A as shown in FIG.

As a result, the slider 7 rotates counterclockwise about the valve shaft 3 against the spring force of the return spring 6, and the throttle valve 2 opens. In addition, the motor 17 causes the pulley 1 to
0 in the direction of arrow B, the wire cable 8 is wound around the pulley 10, thereby rotating the pulley 7 counterclockwise and increasing the opening degree of the throttle valve 2. That is, the throttle valve 2 is connected to the accelerator pedal 11 and the motor 17.
It will be operated by both. Since the moving speed of the wire cable 8 by the pulley 10 is proportional to the rotational speed of the motor 17, by controlling the rotational speed of the motor 17, various driving operations that cannot be obtained by simply depressing the accelerator pedal 11 can be achieved. It will be done. For example, if you want to obtain a large acceleration, you can increase the rotation speed of the motor 170 (higher speed), and conversely, if you want to start on an icy road or the like, and there is a risk of the wheels slipping, you can lower the rotation speed of the motor 17. In some cases, by reversing the speed, it is possible to suppress the slow acceleration and start the vehicle smoothly.Also,
It is also possible to select an operating region where the engine efficiency is good for the vehicle to travel. Note that these operations are performed by processing information from the accelerator sensor 14, rotation angle sensor 18, throttle opening sensor 24, and sensor 26 by the electronic control unit 27.

Furthermore, when the motor 17 fails and an abnormality is detected in the rotational operation of the boolean IJ 10 according to the output of the electronic control unit 27, that is, the output of the rotation angle sensor 18, the electronic control unit 27 that has input this detection signal immediately Electromagnetic clutch 16
Turn off. As a result, the pulley 10 is separated from the motor 17 and returned to the set position by the return spring 20 or 21.

Thereafter, the throttle valve 2 can be opened and closed using only the accelerator pedal 11 to maintain the running of the vehicle.

In addition, in the embodiment, an example using the wire cable 8 has been described, but the same effect as described above can be obtained even if a chain or a belt is used.

〔Effect of the invention〕

As explained above, according to the present invention, a pulley is attached to the valve stem of the throttle valve via an arm biased in the direction of closing the throttle valve, and one end of the wire cable wound around the pulley is connected to the accelerator pedal, and the other end is connected to the accelerator pedal. are each connected to a pulley that is rotationally driven by a motor, and the pulleys can be disconnected by the motor and electromagnetic clutch, allowing the vehicle to continue running even if the motor becomes inoperable, and preventing sudden braking of the vehicle. This will eliminate the risk of rear-end collisions with following vehicles.

In addition, when wheel slip occurs, the throttle valve opening is reduced to reduce the engine torque.In order to prevent automatic transmission from shifting during gear shifting, there is a device that reduces the throttle valve opening when shifting gears. can also be used.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a throttle valve control device according to the present invention, FIG. 2 is a sectional view taken along the line 1--2 in FIG. 1, and FIG. 3 is a sectional view taken along line 11 in FIG. 1... Air intake pipe, 2... Throttle valve, 3...
Valve stem, 4... Arm, 6... Return spring, 7
...Pulley, 8.Wire cable, 10...Pulley, 1
1...Accelerator pedal, 16...Electromagnetic/clutch,
17...Motor, 19...L/bar, 20.21...
・Return spring, 25...stopper. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] An arm is attached to the valve shaft of the throttle valve in a seesaw shape, a pulley is supported at one end of the arm, a return spring is provided at the other end of the arm to bias the arm in the direction of closing the throttle valve, and a wire is attached to the pulley. Route the cable,
One end of the wire cable is connected to the accelerator pedal, and the other end is connected to a pulley driven by a motor. This pulley is rotated left and right based on the set position, and has a return spring that returns to the set position. 1. A throttle valve control device for an engine, characterized in that the pulley and the motor are connected via an electromagnetic crank.