JPS63297739A - Throttle valve controller - Google Patents

Abstract

PURPOSE:To prevent the speed change shock by allowing a throttle valve to be driven through the first prime mover gear in correspondence with the stepping-on of an accelerating pedal or through the second prime mover gear by a driving motor and installing a turn restricting device on the first prime mover gear. CONSTITUTION:A gear 4 is fixed onto the valve shaft 3 of a throttle valve 2, and the large gear 68 of a differential gear device 6 consisting of a pair of bevel gears 61 and 62 and small bevel gears 66 and 67 is meshed with the gear 4. The first and second prime mover gears 7 and 8 are meshed with the bevel gears 61 and 62, and the first driving gear 7 is turned through a wire 25, turn restricting device 12, and a segment type disc 11 by the stepping-on of an accelerating pedal 13. The second prime mover gear 8 is turned by an electronic-control actuator 17. The turn restricting device 12 restricts the turn of the first prime mover gear 7, since the throttle valve 2 is temporarily closed during traction control or at the speed change timing of an automatic transmission.

Description

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

[Conventional technology]

Recently, as part of engine control to improve exhaust purification performance and fuel efficiency, the throttle valve and accelerator pedal have been mechanically connected, and a signal that converts the amount of accelerator depression into an electrical quantity (accelerator depression amount signal) and other signals have been introduced. Progress is being made in the development of a throttle valve control device using an electronically controlled actuator that controls the opening and closing of the throttle valve in response to signals representing engine operating conditions or vehicle running conditions (e.g., engine speed signal, gear position signal, etc.). There is.

The opening and closing of the throttle valve is performed by a drive motor that operates in response to commands from a vehicle control device comprising a calculation control unit that sequentially calculates the optimal opening degree in response to signals representing engine operating conditions or vehicle running conditions. It will be done.

Therefore, it is necessary to provide a safety device that prevents the vehicle from running out of control even if the electronically controlled actuator including the drive motor becomes inoperable while the vehicle is running.

An example of such a safety device is an electromagnetic clutch that disconnects the throttle valve shaft from the drive motor in the event of loss of control, and a return spring that fully closes the throttle valve when the electromagnetic clutch is turned off. The configuration installed on the throttle valve shaft was created by the Japanese Patent Publication No. 58-2585.
It is disclosed in Publication No. 3.

On the other hand, the electronically controlled actuator's f! IIJ @ A device that mechanically rotates in response to the amount and amount of depression of the accelerator pedal opens 6%.
It is disclosed in Japanese Patent Application Laid-open No. 1-215436 and Japanese Patent Application Laid-Open No. 61-272423.

[Problem that the invention seeks to solve]

Conventional throttle valve control devices are configured as described above, so if the electronically controlled actuator becomes inoperable, it is possible to prevent the vehicle from running out of control, but it is not possible to maintain running and the vehicle must be moved to a designated location for repairs. The problem was that it became impossible to move the vehicle.

This invention has been made to solve these problems, and when slipping of the drive wheels occurs when starting or accelerating a vehicle, traction control or automatic gear shifting is implemented to reduce the throttle opening and reduce the engine torque. The object of the present invention is to provide a throttle valve control device that can be used as a device for reducing the throttle opening when changing gears to prevent shocks when changing gears, and can also prevent the vehicle from running out of control in the event of a failure of the electronically controlled actuator. do.

[Means for solving problems]

The throttle valve control device according to the present invention includes first and second drive gears that are driven independently by meshing with a differential gear device whose output shaft drives a valve shaft for opening and closing the throttle valve. a return spring that acts on each of the first and second driving gears in a direction to close the throttle valve; and a rotation limiting device for the first driving gear that rotates in response to depression of the accelerator pedal. An electronically controlled actuator including a round drive motor that rotationally drives the second driving gear is provided.

[For production]

In this invention, the first driving force m*, which normally meshes with the differential 'tdJ gear device, is directly rotationally driven by the connecting means from the accelerator pedal, so that the first driving force m*, which is normally engaged with the differential 'tdJ gear device, is rotationally driven directly by the connecting means from the accelerator pedal, so that The throttle valve can move, and the
T! Opening/closing control to the target throttle opening instructed from the rlJ hook is performed via the second driving gear, and the throttle opening is controlled contrary to the operation of the VC accelerator pedal, such as during traction control or shifting of an automatic transmission. (b) When it is necessary to reduce the rotation speed of the first driving gear, the motion limiter stops the rotation of the first driving gear, and at the same time activates the electronically controlled actuator in the arithmetic control section, If the throttle valve cannot open or close due to a failure of the electronically controlled actuator, turn off the power and quickly return the second driving gear to the fully closed position using the return spring. The throttle valve is opened and closed only by mechanical connection with the accelerator pedal.

〔Example〕

Embodiments of the throttle valve control device of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of one embodiment. In FIG. 1, reference numeral 1 denotes an air intake pipe of an engine (not shown), and a throttle valve 2 is provided within this air intake pipe l.

The throttle valve 2 is opened and closed by a valve shaft 3.

A gear 4 is coupled to the tip of the valve shaft 3. One end of a first return spring 5 is fixed to the side of the gear 4.

The first return spring 5 is formed into a coil shape, and the valve shaft 3 is inserted into the spring, and the other end is fixed to a fixed end of an engine, for example.

This first return spring 5 generates a direction and torque to return the throttle valve 2 to the closed position, and applies it to the valve shaft 3 via the gear 4.

The differential gear device 6 includes bevel gears 61, 62, a shaft 63, a bearing 64, a pinion shaft 65, small bevel gears 66, 67, and large teeth jtL68. The bevel gears 61 and 62 are respectively rotatable on a shaft 63, and the shaft 63 is supported by a bearing 64, and a pinion shaft 65 is fixed to the shaft 63 so as to be orthogonal thereto.

Small bevel gears 66.67 are attached to the pinion shaft 65, and the small bevel gears 66.67 mesh with the bevel gears 61.62.

Further, both ends of the pinion shaft 65 are fixed to a large gear 68. The rotation of the pinion shaft 65 causes the rainbow gear 68 to rotate, thereby rotating the valve shaft 3 via the gear 4.

First and second drive gears 7.8 mesh with the outer peripheries of the bevel gears 61, 62, respectively.

This first driving tooth! 70 A rotating shaft 9 is meticulously fixed, and a segment-shaped disc 11 is fixed to this rotating shaft 9 with a port 10, and in the groove of this segment disc 11 there is a groove connected to a rotation limiting device 12. is connected to the accelerator pedal 13 by a wire 25b via a rotation limiting device 12.

The rotation limiting device 12 applies a tensile force between arms 122 and 123 whose two ends are pivotally connected to a bin 121 fixed to a fixed engine, for example, so as to be rotatable. The spring 124 and the arm 1
A rotation limiting member 125 that limits 220 rotations, a drive motor 126 that drives this rotation limiting member 125 in the direction of arrow A1, and a current control circuit 1 that supplies current to this rotation limiting member 125.
It consists of 27.

Arm 122 is connected to segmented disc 11 by wire 25a, and arm 123 is connected to accelerator pedal 13 by wire 25b.

A coil-shaped second return spring 14 is wound around the outer peripheral surface of the rotating ring 9. One end of the second return spring 14 is fixed to the side of the first driving gear 7, and the other end is fixed to a fixed end of an engine, for example.

This second return spring 14 applies a torque to the first driving gear 7 in the direction of returning the throttle valve 2 to the closed position.

Further, the accelerator pedal 13 has a return spring 1
A stopper 16 is provided opposite the accelerator pedal 13 to prevent the accelerator pedal 13 from being depressed more than a predetermined level.

The electronically controlled actuator 17 is a DC drive motor 171
, an electric current fAt for supplying current to this, and a control circuit 172. The rotating shaft 18 of this drive motor 171 is fixed to the axis of the second driving tooth Ji8.

A coil-shaped third return spring 19 is wound around the outer peripheral surface of the rotating shaft 18, and one end of the third return spring 19 is fixed to the side of the second driving gear 80, and the other end is fixed to a fixed end of an engine, etc. Fixed.

This third return spring 19 applies torque to the second driving gear 8 in the direction of returning the throttle valve 2 to the closed position.

The throttle opening sensor 20 detects the opening of the throttle valve 2 and sends the detected output to the arithmetic control section 24.

Further, the rotation angle sensor 21 is connected to the rotation axis 18, that is, the second
The amount of rotation of the driving gear 8 is detected and the detected output is sent to the arithmetic controller 24.

Further, the accelerator sensor 22 is configured to detect the amount of depression of the accelerator pedal 13 operated by the driver and send the detected output to the arithmetic control section 24.

In addition, 23 indicates the operating state 1111 of the engine (for example, the rotation number N
, automatic transmission shift timing T) and vehicle operation and status (
For example, it is a sensor that detects brake operation B).

The arithmetic control unit 24 inputs output signals from the throttle opening sensor 20° rotation angle sensor 21, accelerator sensor 22, and sensor 23, and performs predetermined arithmetic processing corresponding to these input information to control the current. Control circuit 12
At the same time, the current control circuit 172 of the electronically controlled actuator 17 is controlled and the second driving gear 8 is controlled via the drive motor 171.

Next, the operation of this invention will be explained. Drive motor 17
1 rotational driving force is transmitted to the second driving tooth X8 via the rotating shaft 18.
, bevel gear 62, small bevel gear 66°67, pinion shaft 6
5 and canines! It is transmitted from the gear 4 to the valve shaft 3 via 68.

On the other hand, in response to changes in the degree of depression of the accelerator pedal 13, the arm 123 rotates around the wire 22 with the bin 121 as the rotation axis.
Rotate via b.

Under normal conditions, as shown in FIG.
When the arm 123 rotates by operating the accelerator pedal 13, the arm 122 rotates together with the bin 121 as the rotation axis, so it is connected to the arm 122. The segmented disc 11°, that is, the first driving gear 7 is mechanically connected to the accelerator pedal 13 and is directly driven to rotate, thereby opening and closing the throttle valve 2.

In this state, for example, when a signal indicating the shift timing T of the automatic transmission is inputted from the sensor 23 to the arithmetic control section 24, the drive motor 126 is activated by the rotation limiting member 125 via the current control circuit 127 as shown in FIG. is moved in the direction of arrow A1, and the rotation of the arm 122 relative to the degree of depression of the accelerator pedal 13 is limited.

That is, the spring 124 expands without the arm 122 following the rotation of the arm 123.

As a result, the rotation of the first driving gear 7 connected to the arm 122 is limited and stopped.

At the same time, the arithmetic control section 24 drives the electronically controlled actuator 17, and the second driving tooth! 8 to close the throttle valve 2 to a predetermined opening degree.

Next, when the shift operation of the automatic transmission is completed, the electronically controlled actuator 17 and the rotation limiting device 12 are retightened to the normal operating state.

In this way, a well-known effect of temporarily closing the throttle valve 2 during a gear change to prevent shock during a gear change is achieved.

On the other hand, when the rotation angle sensor 21 detects that the electronic side (2) actuator 17 has failed and drive control of the drive motor 171 is no longer possible, the arithmetic control unit 24 immediately stops supplying current to the drive motor 171. .

As a result, the second driving gear 8 is rotated by the spring force of the third return spring 19 along with the rotating shaft 18 of the drive motor 171, and the throttle valve 2 is returned to the fully closed position (initial setting position).

Thereafter, the operation of the accelerator pedal 13 rotates the first motive gear 7, which is the normal operation state described above, and the vehicle can travel safely.

〔Effect of the invention〕

As explained above, this invention is configured so that the first driving gear is rotated in response to depression of the accelerator pedal, and the rotation of the first driving gear is limited by a rotation limiting device. This makes it easier to control the throttle valve to close in response to depression of the accelerator pedal, and is therefore useful for traction control that reduces engine torque, or for devices that reduce the throttle opening during gear shifting to prevent shock during gear shifting in automatic transmissions. can also be used.

Furthermore, even if the electronically controlled actuator fails, the vehicle will not run out of control or become unable to run, resulting in excellent reliability.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the configuration of a throttle valve control device according to an embodiment of the present invention, and Fig. 2 shows a normal state in which the rotation limiting member in the same embodiment does not limit the (2) movement of the arm. FIG. 2... Throttle valve, 3... Valve shaft, 6... Differential gear system [, 5, 9, 19... Return spring, 7...
...First driving gear, 8...Second driving gear, 12.
...Rotation limiting device, 13...Accelerator pedal, 17.
...Electronic control actuator, 125... Rotation limiting member. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure 2 Procedural amendment (voluntary)

Claims (1)

[Claims] A valve shaft for opening and closing a throttle valve that varies the output of the engine, a differential gear device that drives this valve shaft, and a valve that meshes with this differential gear device and is driven independently and driven by this differential gear device. first and second driving gears that transmit force;
a mechanical coupling means for rotationally driving the first driving gear in response to depression of the accelerator pedal; an electronically controlled actuator including a drive motor for rotationally driving the second driving gear; and a traction control device. Alternatively, a rotation limiting device including a drive motor that drives a rotation limiting member for limiting rotation of the first driving gear in order to temporarily close the throttle valve during a shift period of the automatic transmission; an arithmetic control unit that drives the electronically controlled actuator to rotate the second driving gear when the rotation of the first driving gear is restricted, and stops the operation when the electronic restriction actuator fails; A throttle valve control device comprising: a return spring that acts on each of the drive gears in a direction to close the throttle valve.