JPH0230933A - Throttle valve driving device - Google Patents

Abstract

PURPOSE:To safely continue the operation at the time of an abnormality by connecting one end section of a throttle valve to a motor via an ordinarily opened clutch and connecting the other end section to an accelerator pedal via an ordinarily closed clutch. CONSTITUTION:A controller 19 controls a motor 8 opening or closing a throttle valve 11 based on the detection signal of a potentiometer 17 detecting the depression quantity of an accelerator pedal 16. In this case, one end section of an ordinarily opened clutch 9 in the nonconnective state when not excited and one end section of an ordinarily closed clutch 13 in the connective state when not excited are connected to both end sections of the throttle valve 11 respectively. The motor 8 and a throttle valve 15 are connected to the other end sections of the clutches 9 and 13 respectively. At the time of an abnormality, i.e., under no excitation, the driving force of the motor 8 is cut off, the throttle valve 11 is opened or closed only by the driving force of the accelerator pedal 16.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a throttle valve drive device for controlling the speed of a motor vehicle.

Conventional technology In recent years, automobiles, especially passenger cars, have been aiming to improve responsiveness.
When the driver depresses the accelerator pedal, a sensor detects the amount of depressing the accelerator pedal, an electrical signal is input to the amplifier according to the amount of depressing the accelerator pedal, and the output from the amplifier is input to the motor. A so-called drive-by-wire one-way throttle valve driving device in which a throttle valve opens and closes has become popular.

The conventional throttle valve drive device as described above will be described below with reference to the drawings.

FIG. 2 shows a conventional throttle valve driving device. In FIG. 2, 1 is an accelerator pedal, 2 is a potentiometer, and the output voltage of the potentiometer 2 changes in proportion to the amount by which the accelerator pedal 1 is depressed. 2a is an amplifier that inputs the signal from potentiometer 2, 3 is a motor controlled by amplifier 2a, 4 is a fail-safe clutch, 5 is a throttle body with a throttle valve arranged inside, and the amount of air mixture entering intake manifold 7. Adjust. A throttle sensor 6 is mechanically connected to the motor 3 and the clutch 4, and to the throttle valve in the throttle body 5 and the throttle sensor 6.

The operation of the throttle valve drive device configured as described above will be described below.

First, when an accelerator pedal 1 is depressed, an output voltage proportional to the amount of pedal depression is generated in a directly connected potentiometer 2. This output voltage is input to the amplifier 2a, a command is issued from the amplifier 2a to the motor 3, and the motor 3 is driven. Further, a throttle sensor 6 is connected to the throttle body 4, which generates a voltage in proportion to the movement of the throttle valve inside the throttle body 4.

At this time, the fail-safe clutch 4 is operating so that the output shaft of the motor 3 and the throttle valve are connected.

Also, the throttle body 5 is connected to the intake manifold 7.
Further, the intake manifold 7 is directly connected to the engine. Therefore, when the accelerator pedal 1 is depressed, the motor 3 rotates, the throttle valve in the throttle body 4 opens and closes, and the air-fuel mixture flows into the engine through the intake manifold 7. When an abnormality occurs in the motor 3 or other parts, for example, when it locks up, there will be a difference between the voltage of the potentiometer 2 and the voltage of the throttle sensor 6. The internal throttle valve closes, cutting off the flow of air mixture to the engine and stopping the engine.

Problems to be Solved by the Invention However, the above configuration has the disadvantage that the engine stops in the event of an abnormality, which increases the danger when the vehicle must be driven.

In view of the above drawbacks, the present invention provides a throttle valve drive device that allows the vehicle to run safely without stopping the engine even if an abnormality occurs.

Means for Solving the Problems In order to achieve this object, the throttle valve drive device of the present invention includes a normally open type (hereinafter referred to as No type) first clutch that is in a disconnected state when no power is applied, and a first clutch that is a normally open type (hereinafter referred to as No type) that is disconnected when no power is applied. Normally closed type (when connected)
a second clutch (hereinafter referred to as the NC type),
A configuration in which a throttle valve is connected to one end of each of the clutches, a motor controlled by a controller is arranged at the other end of the first clutch, and a throttle lever interlocked with an accelerator pedal is arranged at the other end of the second clutch. I have to.

Operation With the above configuration, the present invention has the first clutch in the connected state and the second clutch in the disconnected state during normal times (when energized), so that only the driving force from the motor is transmitted to the throttle valve. The opening and closing operations of the throttle valve are controlled by a motor. In addition, in the event of an abnormality (when no power is applied), the first clutch is disconnected and the second clutch is connected, so only the driving force of the throttle lever is transmitted to the throttle valve, and the throttle valve opens and closes. This can be done by the throttle lever. Therefore, in the event of an abnormality, the driver can continue driving the vehicle without stopping the engine by operating the throttle lever via the accelerator pedal.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a main part of a throttle valve driving device according to an embodiment of the present invention.

In Fig. 1, 8 is a motor, 9 is a first clutch, 10
1 is a throttle body, 11 is a throttle valve, 12 is a throttle sensor, 13 is a second tarlatch, 14 is a return spring, and 15 is a throttle lever.

The operation of the throttle valve drive device configured as described above will be described below.

The first clutch 9 is of the No type, and during control, the clutch disc is attracted and the movement of the motor 8 is transmitted to the throttle valve 11 in the throttle body 10. The second clutch 13 is of the NC type, and during control, the clutch disc is released and the movement of the throttle lever 15 is not transmitted to the throttle valve 11. Also, throttle sensor 1
2 is connected to the throttle valve 11, so if a voltage is applied, the movement of the throttle valve 11 can be constantly monitored by changes in the output voltage. 16 is an accelerator pedal, and 17 is a potentiometer. This potentiometer 17 can obtain an output voltage according to the movement of the accelerator pedal 16. 1
8 is an accelerator cable connected to the throttle lever 15, and when the pedal 16 is stepped on to the accelerator, the throttle lever 15 moves.

During control, the output of the potentiometer 17 connected to the accelerator pedal 16 enters the amplifier in the controller 19, which drives and controls the motor 8 to control the throttle valve 1.
Open and close 1.

At this time, the throttle lever 15 also moves in conjunction with the accelerator pedal 16, but since the second clutch 13 is of the NC type, the clutch disc is separated and the throttle valve 11 does not move (in a disconnected state).

The controller 19 constantly compares the voltage difference between the output voltage of the potentiometer 17 and the output voltage of the throttle sensor 12, and when an abnormality appears in the voltage difference, the controller 19
The microcomputer determines that there is an abnormality and instantly cuts off the power to the first clutch 9 and the second clutch 13.

Then, the connection between the motor 8 and the throttle valve 11 is released, and conversely the connection between the throttle lever 15 and the throttle valve 11 is released.
is connected, so when the driver depresses the accelerator pedal 16, the throttle valve 11 is opened or closed via the throttle lever 15, and the air-fuel mixture can continue to be sent to the engine by the driver's operation even in the event of an abnormality. It can be moved.

Further, since the throttle body 10 is directly connected to the engine via the intake manifold, the photographic motion generated by the engine is transmitted to the throttle body 10. By disposing the motor 8 and throttle lever 15 on both sides of the throttle body 10, weight imbalance is reduced, and by dividing the first clutch 9 and the second clutch 13 on both sides, the transmission mechanism is simplified. I can do it. Also, during control, the motor 8 has a rotor of the motor 8,
Disc of first clutch 9, throttle valve 11.
Although the load including the inertia of the disk of the second clutch 13 is driven, since the second clutch 13 is an NC type, the inertia of the disk becomes large due to its structure. Therefore, if the disk of the second clutch 13 has a smaller inertia and is connected to the throttle valve 11, the combined inertia will be better than if the disk of the second clutch 13 which has a large inertia is connected to the throttle valve 11. can also be made much smaller. Therefore, reduce the motor torque (
In other words, the weight can be reduced, and the effect of weight reduction, which is a major issue for cars, can be expected. second clutch 1
Since the disk No. 3 with large inertia is always connected to the accelerator pedal 16, even if the inertia becomes slightly large, there will be no problem in operation.

Effects of the Invention As described above, according to the present invention, the motor is disposed on the opposite side of the throttle valve via a No type clutch,
On the opposite side of the throttle valve, a throttle lever is connected to the accelerator pedal via an NC type clutch. Since the throttle valve can be opened and closed, safe driving can be ensured at all times.In addition, by arranging the motor, throttle lever, and attached clutch on both sides of the throttle valve, it is possible to provide a throttle valve drive device with a simple structure.

Furthermore, by connecting a normally closed type rotor with low inertia to the motor side during normal operation, the overall inertia can be kept small, and the drive motor can be made smaller, so the weight can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partially cut away configuration diagram of a throttle valve drive device showing an embodiment of the present invention, and FIG. 2 is a perspective view showing a conventional throttle valve drive device. 8... Motor, 9... First clutch, 10... Throttle sensor, 11...
・Throttle valve, 12... Throttle sensor, 13... Second clutch, 14...
・Return spring, 15... Throttle lever, 16... Accelerator pedal, 17...
...Potentiometer, 18...Accelerator cable, 19...Controller.

Claims (3)

[Claims] (1) In a throttle valve drive device that detects the amount of depression of the accelerator pedal and uses a controller to drive and control the motor for opening and closing the throttle valve, there is a normally open type first clutch that is disconnected when no power is applied, and a first clutch that is disconnected when no power is applied. a normally closed type second clutch that is in a connected state at times, a throttle valve is connected to one end of the first clutch and the second clutch, and a motor is disposed at the other end of the first clutch. death,
A throttle valve driving device in which a throttle lever interlocked with an accelerator pedal is disposed at the other end of the second clutch. (2) The throttle valve according to claim 1, wherein a normally open type clutch and a motor are arranged on one side with the throttle valve in the center, and a normally closed type clutch and a throttle lever interlocked with an accelerator pedal are arranged on the opposite side. Drive device. (3) The throttle valve drive device according to claim 1, wherein of the two disks constituting the second clutch, the one with smaller inertia is disposed on the throttle lever side.