JPS62188880A - Throttle actuator for automobile - Google Patents

Abstract

PURPOSE:To make it possible to manually operate a throttle valve by connecting the first rotor with a motor driving system by means of a motor driving force transmitting means at the time of normal state and by releasing a motor driving force transmitting means and catching a rotation transmitting means at the time of abnormal state. CONSTITUTION:A motor driving force transmitting means 25 for transmitting a motor driving force is provided in the motor and the first rotor 22 of a throttle actuator 20, which operates at the time of normal state. The first rotor 22 shifts to the second position and claws 28a, 28b operate as a rotation transmitting means 28 at the time of abnormal state and torque to the first rotor 22 is transmitted by means of the pedal of an accelerator 3. Accordingly, a throttle valve can be mechanically and directly controlled even at the time of abnormal state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a throttle actuator for an automobile, and more particularly to an operating mechanism of a throttle device that controls the amount of intake air in an automobile engine.

(Prior Art) Conventionally, a throttle actuator for engine control of an automobile has a throttle valve l as shown in FIG.
It consists of a wire 4 whose one end is wrapped around a circumferential concave groove of a circle pH2 that rotates, and whose other end is connected to the accelerator pedal 3. Inhalation is achieved by opening and closing the throttle valve l in response to the depression of the accelerator pedal 3. This was to adjust the amount of air.

Incidentally, in recent years, proposals have been made to improve the functionality of automobiles by controlling the throttle valve electrically, as shown in, for example, "Isuzu Branch" No. 72.

The throttle actuator for this throttle valve electrical control method basically operates the motor 5 by the output of the computer unit 6 as shown in FIG. k
llL, the throttle valve 1 is opened and closed by its driving force.

That is, the throttle valve 1 is driven by a throttle actuator including a motor 5 to adjust the intake air amount of the engine E. Motor 5 is computer unit 6
The computer unit 6 has the sensor 3a of the accelerator pedal 3, the selector lever 7. Engine coolant temperature sensor 8. Traffic sensor 9. Signals from the engine rotation sensor 10 and the like are input, and the drive system of the motor 5 is calculated based on the input signals of these sensors, and the input from the throttle position sensor 11 is read to perform foot-noise control to a target value.

The computer unit 6 also drives actuators for engaging and disengaging the clutch 12 and changing the gear position of the transmission 13.

Such a system not only automatically switches transmissions, but also has the effect of alleviating shock during gear changes and improving fuel efficiency. Furthermore, by inputting a switch signal from the cruise operation switch 14, the computer unit 6 drives the motor 5 so as to adjust the opening degree of the throttle valve l so that the vehicle travels at a certain set speed. Another advantage is that it can be easily configured.

(Problems to be Solved by the Invention) However, since the throttle actuator in the conventional throttle valve electrical control method directly connects the drive shaft of the motor 5 and the rotation shaft of the throttle valve 10, if the computer unit If a failure occurs in the throttle actuator, or if there is a poor connection in the wiring to the motor, the throttle valve l will stop and become immobile. Therefore, if such a situation were to occur with the throttle valve open, the engine E would rotate at a high speed, potentially causing the vehicle to run out of control.

On the other hand, if the throttle valve stops with the throttle valve fully closed, the engine either stops or only moves at a very low rotational speed, so the car stops and becomes unable to move. Generally, in order to prevent a car from running out of control, a spring blade is used to fully close the throttle valve in the event of a malfunction, but this only ends up making the car unable to move.

SUMMARY OF THE INVENTION An object of the present invention is to address these conventional problems and provide a throttle actuator that allows the throttle valve to be manually operated even in the event of failure of the computer unit or motor, or poor connection of the wiring.

(Means for Solving the Problems) A throttle actuator for a vehicle according to the present invention includes a first rotating body that is interlocked and rotatably supported to open and close a throttle valve of a vehicle, and a first rotating body that is rotated by an accelerator pedal of a vehicle. a second rotary body that is movably interlocked; a motor that is controlled by a controller; and a shift device that selectively moves the first rotary body to a first position and a second position; A drive system for the first rotary body and the motor is provided, and the first rotary body is engaged to transmit the rotation of the motor to the first rotary body when the first rotary body is shifted to the first position. a motor driving force transmitting means comprising a pair of mating elements; and a motor driving force transmitting means provided on the first and second rotary bodies, the second The rotation transmitting means includes a pair of elements that engage to transmit the rotation of the rotary body to the first rotary body.

(Function) According to the automobile throttle actuator of the present invention,
The motor is controlled by a controller, and when the controller is operating normally, the first rotating body is always shifted to the first position by the shift device, and the first rotating body is shifted to the first position by the motor driving force transmission means. and a motor drive system are operatively coupled. Thereby, the opening and closing of the throttle valve of the automobile is controlled by the driving force of the motor via the first rotating body. if,
If a failure occurs in the controller, motor, power supply wiring, etc., the shift device shifts the first rotating body to the second position.

Therefore, the motor driving force transmitting means is released, and conversely, the rotation transmitting means is engaged, so that the rotation of the second rotary body can be transmitted to the first rotary body.

Since the second rotating body is rotatably linked to the accelerator pedal of the automobile, the operating force from the accelerator pedal opens and closes the throttle valve from the second rotating body via the first rotating body.

(Embodiments) Hereinafter, the throttle actuator of the present invention will be described in more detail with reference to preferred embodiments shown in the accompanying drawings.

1 and 2 show a throttle actuator 20 according to a first embodiment of the invention. This throttle actuator 20 includes a motor 2) which is driven and controlled by a controller consisting of a computer unit 6 similar to that shown in FIG. The first rotating body 22 of
are slidably and relatively rotatably mounted. A wire 22m is formed on the circumferential surface of the first rotating body 22, and a wire 23 with one end fixed to the groove 22a is partially wound around the surface of the first rotating body. The throttle valve l is wound around a similar circumferential groove in the disk 2 to the disk 2 that opens and closes it, and the other end is fixed.This causes the rotation of the first rotating body 22 in the wire winding direction. can be transmitted to the opening/closing operation disc 2 of the throttle valve l.This opening/closing operation disc 2 is always connected to the throttle valve l by a spring 15 such as a spiral spring provided on its shaft that exerts an acting force in the direction of rotation. is receiving rotational force to fully close it.

By the way, a boss portion 22b is integrally formed at the center of the motor-side side surface of the first rotating body 22.
A groove 22c is formed on the circumferential surface of 2b. A U-shaped portion 24b at one end of a shift lever 24a of the shift device 24 is fitted into the groove 22c of the boss portion 22b.

This shift device 24 includes a shift lever, S 24a, a magnetic lens 24e, and a coil spring 24f.
including.

That is, one end of the U-shaped portion 24b is inserted into the groove 22 of the boss portion 22b.
The intermediate portion of the shift lever 24a fitted in the shift lever 24a is pivoted in place by a pin 24d so that one end of the shift lever 24a can be moved from side to side by the motor drive shaft 2)aK.

The other end 24c of the shift lever 24a is a free end, and a galvanic lens 24e is disposed on the side of the first rotating body so that the other end 24c can be magnetically attracted. Further, a tension coil spring 2 is provided on the other side of the other end 24c.
4f is arranged, and its -ffi is attached to the other end 24c, and the other end is attached to a suitable fixing part. With this, the other end 24c of the shift lever 24a is connected to the electromagnetic lens 2.
When it is not magnetically attracted by 4e, that is, when it is not energized, it is pulled in the opposite direction by the coil spring 24f. As a result, the shift lever 24a is pivoted about the pin 24d by energizing and de-energizing the electromagnetic lens 24e, and the first rotating body 22 is caused to slide left and right on the motor drive shaft.

A motor driving force transmitting means 25 consisting of a pair of elements is provided on the drive shaft 2)a of the motor 2) and the first rotating body 22 to transmit the motor driving force to the first rotating body. The 10,000 element 25a of this motor driving force transmission means 25 is the first
This is an engagement surface formed by forming a large number of radially extending grooves on the end face of the boss portion 22b of the rotating body 22. Further, the other element 25b is an engagement surface similarly formed on the side surface opposite to the engagement surface 25a of seven flanges integrally formed on the motor drive shaft 2)a. 7 langes having the other engaging surface 25b have an electromagnetic lens 24e that is connected to the shift lever.
When the other end of 24a is attracted and pivoted, and thereby the first rotating body 22 is slid to the first position, the end face of the zest portion 22b of the first rotating body 22 comes into contact with the engaging surface 25a. They are formed in a position where they touch and mesh.

Further, the drive shaft 2)a of the motor 2) is provided with a first rotating body 2.
2 at the center and a first rotating body 22 on the opposite side from the motor.
A second rotating body 26 similar to the above is supported for relative rotation. This second rotating body 26 also has a groove 26a formed on its circumferential surface, and one end of a wire 27 is fixed to the groove F5r of the ridge 26a. This wire 27
6a extends so as to be partially wrapped around the circumferential surface of the second rotating body 26, and the other end is connected to the accelerator pedal 3 of the automobile. As a result, the second rotating body 26 rotates when the accelerator pedal 3 is operated.

Rotation transmitting means 28 consisting of a pair of elements are provided on both opposing sides of the first rotating body 22 and the second rotating body 26. The pair of elements of this rotation transmission means 28 are triangular claws 28a provided on opposite sides of the first and second rotating bodies 22.26.

28b. These two claws 28a.

28b engages when the first rotating body 22 is shifted to the second position by the tensile force of the coil spring when the electromagnetic solenoid in the shift device 24 is de-energized, thereby causing the second rotating body 26 to rotate. is transmitted to the first rotating body 22.

The operation of the automobile throttle actuator according to the first embodiment will now be described.

Near 7) 0-? (Computer unit 6 in FIG. 5) determines the operating state of the engine, the driver's intention, etc. based on the signals inputted by a large number of sensors, and controls the drive of the motor 2). When this controller etc. is operating normally, the electromagnetic lens 24eK of the shift device 24 is energized, and the other end 24c of the shift lever 24a is pulled by the coil spring 24f by this magnetic attraction force.
The first rotating body 22 is shifted to the first position by pivoting the shift lever 24a around the pivot pin 24d. By shifting the first rotating body 22 to the first position, the engaging surface 25a formed on the end surface of the zest portion 22b of the first rotating body 22, which is the motor driving force transmission means 25, and the motor drive shaft 2)a The first rotating body 22 is rotated by receiving the driving force of the motor 2), thereby controlling the opening and closing of the throttle valve l. In this way, under normal conditions, the controller drives and controls the motor based on information from the sensors in each part to control the optimum opening degree of the throttle valve.

However, in such a system, the controller,
If a failure occurs in the motor or the wiring, the motor cannot be driven. Therefore, the controller is configured to cut off the power to the electromagnetic solenoid 24e when a failure occurs in the controller, and when the motor stops moving, the controller monitors the position of the throttle valve with a sensor and moves it to the specified position. If it is determined that there is no solenoid, the controller turns off the power to the electromagnetic solenoid 24e. In addition, if there is a problem with the power supply and the motor, controller, or electromagnetic lens 24e does not receive VC electricity, the electromagnetic lens 24e is in a non-energized state.

Now, if such a failure were to occur, the current to the electromagnetic solenoid 24e would be cut off, causing the shift lever 24a other end 24c to
, the tension of the coil spring 24f causes the shift lever 24a to pivot around the bin 24d, and as a result, the first rotating body 22 is shifted to the second position, and the disc 2 is Since the throttle valve 2 is rotated by the spring 15 to fully close it, this rotation is transmitted via the wire 23. At this time, when the accelerator pedal 3 is not depressed, the rotation transmission means 2
8, claws 28a and 28b formed on opposite sides of the first rotating body 22 and the second rotating body 26 engage in the rotating direction, and from then on, when the accelerator pedal 3 is depressed, the first rotating body 22 and the second rotating body 26 engage with each other in the rotating direction. The second rotating body 26 rotates, and the throttle valve 1 operates to open.

When a failure occurs while the accelerator pedal 3 is being depressed and the first rotating body 22 begins to shift, the engagement between the claws 28a and 28b is caused by the rotation of the throttle valve 1 so that it is fully closed by the spring 15. There are times when it doesn't happen in time. In that case, the throttle valve 1 cannot be opened by the accelerator pedal 3 as it is, but if the accelerator pedal is returned to its original position, the pawls 28a and 28b will easily become engaged in the rotational direction, and from then on the accelerator pedal 3 will not open the throttle valve 1. It becomes possible to control the opening and closing of the throttle valve.

FIG. 3 shows another example of the rotation transmission means described above. The rotation transmitting means 30 shown in FIG. 3 has triangular teeth on the opposing (1111) faces of 2g1 and the second rotating body 22, 26 that are continuous in the circumferential direction partially or over the entire circumference. According to such a rotation transmission means 30, the accelerator pedal 3
Even if the above-mentioned failure occurs when the solenoid is depressed, the first rotating body 22 is shifted to the second position by the force of the coil spring 24f at the same time as the current in the electric arsenal solenoid is cut off. It is locked to the second rotary body 26 at a rotational position corresponding to the amount of depression of the pedal 3 by j''t11.As a result, even if a failure occurs at any time, there will be no problem with operation.

In the first embodiment shown in FIGS. 1 and 2, the second
The rotating body 26 is the same motor drive shaft 2 as the first rotating body 22.
), but both rotating bodies do not necessarily have to be supported coaxially. In this sense, a second embodiment in which the second rotating body 26 is supported on a shaft different from the support shaft of the first rotating body 22 is shown in 41'YIF:. In FIG. 4, the same components as those of the automobile throttle actuator of the first embodiment shown in FIGS. 1 and 2 are given the same reference numerals, and the explanation thereof will be omitted.

In the second embodiment shown in FIG.
is fixed to another shaft 31 which is arranged parallel to the motor drive shaft 2) and is supported by a bearing.

A gear 32a serving as rotation transmission means is attached to the side surface of the second rotary body 26 or its shaft 31. On the other hand,
A gear 32b is also fixed to the side surface tc of the first rotating body 22,
This gear 32b is slidable and rotatable with respect to the motor drive shaft 2)a together with the first rotating body 22. These two gears (2a, 2b) are engaged when the first rotating body 22 is moved to the second position, and are disengaged when the first rotating body 22 is shifted to the first position. Note that in this embodiment, the rotation directions of the first rotating body 22 and the second rotating body 26 are reversed; If the winding direction of the wire 27 from the accelerator pedal 3 is reversed from the example shown in FIG.

The first rotating body 22 can be rotated in the throttle valve opening direction.

In the first and second embodiments, the motor drive force transmitting means 25 has a meshing surface 25a formed by forming a large number of radial grooves on the end surface of the groove portion of the first rotating body 22, and the motor drive shaft 2. ) and an engaging surface 25b similarly formed on the side surface of a flange formed integrally with a, but this engagement can be achieved by frictional force or by a pawl similar to the rotation transmitting means 28. It is. ,Also,
The motor drive transmission means 25 may be configured by shifting two spur gears so that they mesh at 7'C, similarly to the rotation transmission means 30 described in the second embodiment. In that case, the first
The rotating body 22 is fixed or rotatably supported on a shaft different from the motor drive shaft 2]a. Furthermore, although the first rotating body and the second rotating body are constructed of disks, if the structure is such that a wire or the like can be pulled by rotation, they are necessarily disks, and may also be fan-shaped, semicircular, etc. can be unique, such as polygons.

(Effects of the Invention) As explained above, according to the automobile throttle actuator of the present invention, even if there is 6 abnormality dE in the controller, motor, or wiring that controls the throttle valve, the throttle valve can be mechanically and Since it can be controlled directly, it has the excellent effect of preventing fatal accidents such as the car running out of control or the engine stopping and becoming unable to move.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a throttle actuator for an automobile according to an embodiment of the present invention, FIG. 2 is a sectional view of the throttle actuator shown in FIG. 1, and FIG. 3 is a throttle actuator of the first embodiment. FIG. 4 is a sectional view showing a throttle actuator for an automobile according to a second embodiment of the present invention, and FIG. The configuration explanatory diagram shown in Figure 6 is for automobiles (7)
/C is a partially cutaway perspective view of the throttle valve device f. ]... Throttle valve, 3... Accelerator pedal, 6...
...Computer unit (controller), 20...
・Throttle actuator, 2)...Motor, 22
...First rotating body, 23...Wire, 24...Shift device, 24a...Shift lever 124e...Electromagnetic lens, 25...Motor driving force transmission means, 26
. . . second rotating body, 27 . . . wire, 28 . . . rotation transmission means. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (4)

[Claims] (1) A first rotating body that is interlocked and rotatably supported to open and close the throttle valve of the automobile, a second rotating body that is rotatably interlocked with the accelerator pedal of the automobile, and a controller. a motor that is drive-controlled, a shift device that selectively moves the first rotating body to a first position and a second position, and a shift device that is provided in a drive system for the first rotating body and the motor. The first rotating body is the first rotating body.
motor driving force transmitting means comprising a pair of elements that engage to transmit the rotation of the motor to the first rotating body when the motor is shifted to the first rotating body; rotation transmitting means comprising a pair of elements that engage to transmit the second rotary body to the first rotary body when the first rotary body is shifted to the second position. throttle actuator. (2) The shift device includes a lever whose intermediate portion is pivotally connected and whose one end is loosely fitted into a circumferential groove of the boss portion of the first rotating body, and the lever which rotates by magnetically attracting the other end of the lever. an electromagnet disposed on one side of the other end of the lever in order to shift one rotating body and engage the pair of elements of the motor drive transmission means, and an electromagnet with one end connected to the other end of the lever and the other end 2. A throttle actuator for an automobile according to claim 1, further comprising a tension spring connected to the other end of the lever at the other fixed position. (3) The first rotating body and the second rotating body are coaxially arranged, and the first rotating body is slidable and relatively rotatable, and the second rotating body is relatively rotatable. A throttle actuator for a motor vehicle according to claim 1 or 2, characterized in that the throttle actuator is supported. (4) A patent characterized in that the pair of elements of the rotation transmitting means consist of one or more teeth formed on opposite sides of the first rotating body and the second rotating body, respectively. An automobile throttle actuator according to claim 3.