JPS6371527A - Throttle valve control device - Google Patents

Abstract

PURPOSE:To enhance the reliability and responsiveness of a throttle valve driving device by extending a wire between a pulley on a throttle valve shaft and two pulleys being driven by two driving motors. CONSTITUTION:Two pulleys 77, 78 are connected to two driving motors 71, 72 via gears 73 through 76, and between these two pulleys and the third pulley 80, a wire 79 is extended. The third pulley 80 is connected by an accelerator wire to a disk fitted on the valve shaft 3 of a throttle valve 2, so that the throttle valve 2 can be opened or closed by operating the driving motors 71, 72. On the valve shaft 3, an opening sensor 8 is fitted to input an opening signal into an arithmetic control unit 12, so that the throttle valve opening can be controlled to a target value. Thus, even if either motor fails, the throttle valve can be controlled, and accordingly the reliability can be raised, and further the responsiveness can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a throttle valve control device for an automobile engine, and more specifically, to an apparatus for controlling an engine throttle valve using an electronically controlled actuator.

[Conventional technology]

Recently, as part of engine control to improve the driving feeling and fuel efficiency of automobiles, the mechanical connection between the throttle valve and the accelerator pedal has been eliminated, and the signal that converts the amount of accelerator pedal depression into an electrical amount and other engine operating conditions are used. Further, the development of a throttle valve control device using an electronically controlled actuator that opens and closes a throttle valve in response to signals representing the driving state of a vehicle, such as an engine speed signal and a gear position signal, is underway.

In this throttle valve control device using an electronically controlled actuator, the opening and closing of the throttle valve is performed by a calculation control section that sequentially calculates the optimal throttle opening in response to signals representing engine operating conditions or vehicle driving conditions. Since this is done by a drive motor that operates in response to commands from Examples include (1) a configuration in which a return valve is attached to the throttle shaft to return the throttle valve to the closed position when control is stopped, and (2) an electromagnetic clutch is installed to disconnect the throttle shaft from the electronically controlled actuator when control becomes uncontrollable. (3) A configuration in which a return spring and an electromagnetic clutch are combined and the return spring acts when the electromagnetic clutch is disengaged is disclosed in JP-A-55-145867.

[Problems to be Solved by the Invention] However, in these conventional examples, - When the variable electronic control actuator becomes inoperable, the vehicle can be prevented from running out of control, but it is not possible to maintain running, and the specified There was a problem that it became impossible to move the vehicle to the location.

The present invention was made to solve these problems, and an object of the present invention is to provide a throttle valve control device that is highly reliable and also has excellent high-speed response.

[Means for solving problems]

The throttle valve control device according to the present invention includes first. first and second worm gears and pulleys driven by a second drive motor; The engine is equipped with a wire stretched between the second pulleys and a third pulley that is slidable by the wire and operates the throttle valve of the engine.

[Effect]

In this invention, 1. The second drive motor drives the first and second drive motors respectively. The second worm gear and pulley are driven independently, and the first worm gear and pulley are driven independently. By driving the second pulley, the third pulley and the first pulley are driven. The third pulley moves in accordance with the difference in moving speed of the wire between the second pulleys, and opens and closes the throttle valve in accordance with the amount of movement.

〔Example〕

Embodiments of the throttle valve control device of the present invention will be described below with reference to the drawings. The figure shows the configuration of one embodiment, and 1 in the figure is an air intake pipe of an engine (not shown), and 2 is a throttle valve.

The throttle valve 2 is opened and closed by a valve shaft 3, and a disk 4 is fixed to the valve shaft 3. An accelerator wire 5 is hung in the groove of the disc 4.

The accelerator wire 5 is given tension by a return spring 6.

The return spring 6 is attached to the valve stem 3, one end of which is fixed to the disk 4, and has a spiral shape. This return spring 6 applies torque to the valve shaft 3 in the direction of returning the throttle valve 2 to the closed position.

Further, an opening sensor 8 is attached to the valve shaft 3.

The opening sensor 8 detects the opening A of the throttle valve 2, and its detection output is sent to the arithmetic control section 12.

Further, 7 is the base of the actuator. The base plate 7 is provided with two drive motors 71 and 72 having the same characteristics. Worm gears 73 and 74 are fixed to the shafts of the drive motors 71 and 72, respectively. Worm gear 73.74 and worm wheel 75.76 respectively
are meshing.

This worm wheel 75.76 and each goo! J77.78 is formed. This goo! J77
．． 78 is rotatably attached to the base 7.

Wire 7 is connected between this goo 77, 78 and the third goo 980.
9 is installed. Both ends of wire 79 are goo'J77
．． 78 and can be wrapped around it.

Third pulley 80 is placed in contact with wire 79 . A central shaft 81 of the third pulley 80 is inserted into a groove 82 provided in the base 7, so that it can slide vertically.

Further, a hook 83 is fitted onto the central shaft 81, and one end of the accelerator wire 5 is fixed to this hook. The other end of the accelerator wire 5 is wound around the groove of the disk 4.

On the other hand, the driving state detection sensor 9 detects, for example, engine rotational speed N and traveling speed V as the driving state of the vehicle. The engine speed N and traveling speed V are sent to the arithmetic control section 12.

Furthermore, the amount of depression of the accelerator pedal 10 is detected by an accelerator amount detection sensor 11.

The amount of depression detected by the accelerator amount detection sensor 10 is also sent to the calculation control section 12.

This arithmetic control section 12 receives input from the driving state detection sensor 9 and the accelerator amount detection sensor 11, and performs predetermined arithmetic processing on the values of these input signals to determine the target opening degree of the throttle valve 2. At the same time, the output signal is compared with the output signal of the throttle opening sensor 8, and a rotation signal is output to the drive motors 71 and 72 according to the amount of deviation.

Next, the present invention will be explained in detail. Drive motor 71.7
The rotational force of worm gear 73 - worm oil 75 and worm gear 74 . Via the worm oil 76 it acts on the pulley 7.78.

As mentioned above, the ends of the wire 79 stretched between these two pulleys 7 and 78 are fixed to each pulley 77 and 78, so in the figure, by rotating the pulley 7 clockwise and rotating the pulley 8 counterclockwise. For example, the wire 79 is wound around each goo, so that the third pulley 80 placed in contact with this wire is pulled upward.

Let vl be the moving speed of the wire on the pullif 7 side, v2 be the moving speed of the wire 79 on the pullif 8 side (v1*vt also includes the direction), and let V be the moving speed of the third f-180. Then, the relationship vo = Vl + v2 holds true.

For example, moving speed v1 and V! If they are the same, the third pulley 80 does not rotate and moves at the same speed as the wire 79, and if there is a speed difference between the moving speed v and 72, the third pulley 80 rotates and moves at the average speed.

When the third pulley 80 moves in this way, the accelerator wire 5 is pulled through the hook 83 attached to it, and the throttle valve 2 can be opened and closed.

For the drive unit that operates as described above, the arithmetic control unit 12
calculates the target opening of the throttle valve 2 from the information of the accelerator opening A, engine rotation 19N, and vehicle speed ■ detected by the opening sensor 8, and calculates the difference with the output signal of the throttle valve opening sensor 8. A rotation command is given to the drive motors 71 and 72 so that the rotation becomes zero. This rotation command includes contents such as the direction of rotation, energization (rotation), de-energization (stop), and Bra Young depending on the operation mode of the drive motor. It is something that

In the throttle valve control device according to the present invention, the opening and closing operations of the throttle valve 2 can be controlled as long as the drive motors 71 and 72 do not malfunction at the same time, and when both drive motors operate, the operating speed of the throttle valve 2 is controlled. is 1
This is 92 times greater than in the case of two drive motors.

〔Effect of the invention〕

As explained above, this invention drives the valve shaft that operates the throttle valve using a combination of two worm gears and pulleys, and enables the drive motors that operate each pulley to be driven independently, thereby opening the throttle valve. Since the opening/closing is controlled while detecting the temperature, it is highly safe, inexpensive, and has excellent responsiveness.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing the configuration of an embodiment of the throttle valve control device of the present invention. 1... Air intake pipe, 2... Throttle valve, 3...
Valve shaft, 7... Base, 8... Opening degree sensor, 9... Operating state, 10... Accelerator pedal, 11... Accelerator amount detection sensor, 12... Arithmetic control unit, 71. 72・
... Drive motor, 73.74 ... Worm gear, 7
5.76... Worm oil, 77.78... Pulley, 79... Wire, 80... Third pulley, 8
3...Hook.

Claims (1)

[Claims] a pair of first and second drive motors; first and second pulleys driven via worm gears that are individually driven by the first and second drive motors; A wire that can be wrapped at both ends between the pulleys,
a third pulley disposed between the first and second pulleys and slidable on the wire; a throttle valve that is opened and closed by the movement of the third pulley to vary the engine output; information on the opening degree of the throttle valve; The target opening of the throttle valve is calculated from the driving information of the vehicle and the amount of accelerator depression, and the first and second points are adjusted so that the deviation between the opening of the throttle valve and the output signal of the opening sensor becomes zero. A throttle valve control device comprising a calculation control unit that gives a rotation command to a drive motor.