JPH025716A - Throttle valve control device - Google Patents

Abstract

PURPOSE:To control the output power in accordance with an engine operating condition by providing a differential gear unit between a throttle shaft and a throttle lever, and by selectively coupling and discoupling a motor means to and from the differential gear unit. CONSTITUTION:A differential gear unit 7 is disposed between a throttle shaft 4 and a throttle lever 16. A gear 18 is secured to a gear frame 14 in the differential gear unit 17, and a stepping motor 21 is connected to a gear 19 meshed with the gear 18. The drive of the motor 21 is controlled by a computer 22 in accordance with an operating condition. With this arrangement the output of the engine can be controlled in accordance with an operating condition, irrespective of an accelerator operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] <Industrial Application Field> The present invention relates to a throttle valve control device that controls the opening degree of a throttle valve of an internal combustion engine according to operating conditions.

<Prior Art> The throttle valve of an internal combustion engine is normally directly controlled by a driver operating an accelerator device via a throttle wire. Therefore, it is necessary to provide a separate throttle valve control device for idling the engine or automatically driving the vehicle at a constant speed.

Additionally, the driver must directly control the throttle valve in order to deal with slippage of the drive wheels when starting or accelerating on a road surface with a low coefficient of resistance, or locking of the drive wheels when decelerating. Therefore, quite advanced driving skills are required. For this reason, recently, for example, JP-A-62-1
As described in Japanese Patent No. 29529, a method has been developed in which the throttle opening is automatically controlled by driving a motor depending on the operating state.

However, in these conventional technologies, since the accelerator device and the motor are connected to the throttle shaft, when the throttle valve is driven by the motor, the accelerator pedal moves by itself in conjunction with the throttle valve. Therefore, there is an inconvenience in that the driver feels uncomfortable and the driving feeling is significantly impaired. Further, the throttle valve control device disclosed in the above-mentioned publication controls the engine output by adjusting the throttle opening degree by the accelerator device only in the valve closing direction depending on the driving state. Therefore, although it is possible to automatically control the idling of the drive wheels without giving a sense of discomfort to the driver who operates the accelerator device, the engine output does not increase due to the rotation in the valve opening direction. For this reason, it cannot be used for engine idling or automatic constant-speed running, and cannot lock the drive wheels or control the negative pressure in the intake pipe during deceleration.

<Problems to be Solved by the Invention> Therefore, an object of the present invention is to control the opening degree of the thrower valves in both the open and close directions according to the operating state using a motor without interlocking the accelerator device. To provide a throttle valve control device capable of adjusting engine output to optimally perform accelerator operation, automatic constant speed driving, control of slip or lock of drive wheels, and control of negative pressure in an intake pipe. It is in.

[Structure of the Invention] <Means for Solving the Problems> According to the present invention, the above object includes a throttle shaft rotatably supporting a throttle valve, and a throttle lever connected to the throttle shaft. In the throttle body, the throttle shaft is connected to an output end of a differential gear device, the throttle lever is connected to one input end of the differential gear device, and the throttle lever is connected to the other input end of the differential gear device. This is achieved by providing a throttle valve control device characterized in that a motor means is coupled to an input end via a clutch means that is selectively engaged or disengaged.

<Operation> By doing so, the clutch is selectively connected and the motor means is operated to drive the input end of the differential gear device, thereby automatically opening and closing the throttle valve, thereby controlling the operation of the accelerator device. Increases engine output according to driving conditions regardless of
can be reduced.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a butterfly-type throttle valve 3 for opening and closing an intake passage 2 is rotatably supported on a throttle body 1 via a throttle shaft 4. As shown in FIG. A return spring (not shown) is attached to one end 5 of the throttle shaft 4, and constantly biases the thrower valve 4 in the closing direction.

Further, a known throttle sensor for detecting the opening degree of the throttle valve 4 is attached to the outside of the throttle shaft end 5. The throttle opening detected by the throttle sensors 1 to 1 is communicated to an on-vehicle computer, which will be described later, and used to control the throttle valve 4. A differential gear device 7 is disposed on the other end 6 side of the throttle shaft 4 .

The differential gear bag W7 includes an output shaft 8 coaxially connected to the throttle shaft end 6, an input shaft 9 disposed coaxially with the output shaft 8 on the opposite side thereof, and an input shaft 9 connected to the output shaft 8 and the input shaft 9. Bevel gears 10 and 11 each having the same number of fixed teeth and a bevel gear 10
．． Planetary gears 12.1 with the same number of teeth meshing with 11.
3, a gear frame 14 rotatably supported by the input shaft 8 and output shaft 9, and a gear frame 14 fixed to the gear frame 14 perpendicular to the input shaft 8 and output shaft 9 and having planetary gears 12.1, 3. The shaft 15 is rotatably supported. A disk-shaped throttle lever 16 is fixed to the end of the input shaft 9 so as to rotate together with the input shaft 9, and is connected to an accelerator pedal inside the vehicle via a throttle wire 17. Further, a gear 18 is integrally fixed to the gear frame 14, and one gear meshing with the gear 18 is selectively connected to or disconnected from a stepping motor 21 via a clutch 20. The stepping motor 21 is connected to an on-vehicle computer 22, and is electronically controlled according to driving conditions.

This throttle valve control device is used with the clutch 20 connected as shown in FIG. When the stepping motor 21 is not operating, the gear frame 1
4 is fixed in position by the static torque of the stepping motor 21.

Therefore, the throttle lever 16 is moved at an angle α in the direction of arrow A.
When rotated, the throttle valve 3 rotates in the opposite direction by the same angle α. In this way, like a normal throttle body,
The throttle valve 3 can be driven to open or close in response to the amount of operation of the accelerator pedal.

The in-vehicle computer 22 stores accelerator opening θa, engine speed Ne, intake pipe negative pressure Pb, and throttle opening θth.
, the driving state is determined based on the running speed V of the vehicle, the signal A from the sensor that detects the idling state of the drive wheel, the signal B from the sensor that detects the locked state of the drive wheel, etc., and the stepping motor 21 is activated as appropriate. By driving and controlling the opening and closing of the throttle valve 3 via the differential gear device 7, the output of the engine is adjusted to the optimum state.

As shown in FIG. 3, when the throttle lever -16 is in the fully closed position, the stepping motor 21 is decelerated by the drive 1, ILL and gears 18 and 19, and the gear frame 14 is rotated at an angle β in the direction of the mark B. When rotated, since the bevel gear 11 is fixed, the throttle valve 3 rotates in the opposite direction by an angle of 2β. Therefore, the computer 22 operates the stepping motor according to the operating state, opens the throttle valve 3, electronically controls idling operation and automatic constant speed running, and adjusts the negative pressure in the intake pipe during deceleration to reduce the so-called oil pressure. You can prevent it from rising. This eliminates the need for an idle control device, constant speed running device, or intake pipe negative pressure control device, which were conventionally provided separately.

Furthermore, by driving the stepping motor 21 while the throttle lever 16 is rotating, it is possible to optimally control the engine output according to the operating state and perform 1 to traction control 1-roll. For example, as shown in FIG. 4, the rotation angle of the throttle lever 16 is indicated by arrow C.
When the stepping motor 21 is driven to rotate the gear frame 14 by an angle β in the direction of the arrow, the opening degree of the throttle valve 4 becomes α-2β. As a result, when the drive wheels spin while the vehicle is running, the throttle lever 16
The idle state of the drive wheels can be eliminated by automatically reducing the engine output while maintaining the same rotational position, that is, the same amount of operation of the accelerator pedal. Moreover, if the stepping motor 21 is driven in the opposite direction, the gear frame 1
4 rotates in the opposite direction to the arrow and the throttle opening becomes α+2
Becomes β. Therefore, since the throttle lever 16 is returned to the fully open position from near the fully open position, if the drive wheels are locked due to engine braking, the throttle lever 16
While maintaining the same opening position, engine output can be automatically increased to unlock the drive wheels.

The throttle valve control device of this embodiment is used with the clutch 25 connected as described above, but if any abnormality occurs in the stepping motor 21 or its control system, the clutch 20 is disengaged. Since the throttle valve 3 is returned to the fully closed position by the return spring, running safety is ensured. Further, if a locking means is provided to fix the gear frame 14 when the clutch 20 is released, the throttle lever 1 can be fixed as usual.
By operating the throttle valve 6, the throttle valve 4 can be opened and closed.

[Effects of the Invention] As described above, according to the present invention, the accelerator device can be operated by driving the stepping motor to rotate the gear frame of the differential gear device according to the driving state regardless of whether or not the accelerator is operated. Open and close the throttle valve without interlocking it,
Since the engine output can be adjusted in both directions, the negative pressure in the intake pipe during engine idling, vehicle automatic constant speed running, and deceleration can be controlled by a single device without the need for separate control devices. In addition, it is possible to automatically eliminate and prevent the driving wheels from spinning or locking without direct control by the driver. Furthermore, when the stepping motor is stopped, the throttle valve can be directly controlled by operating the accelerator as usual.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram schematically showing the configuration of a throttle valve control device according to the present invention. 2 to 4 are explanatory views of the operation of the throttle valve control device shown in FIG. 1. FIG. 1... Thrower 1 to Luhoday 2... Intake path 3... Throttle valve 4... Throttle shaft 5.6... End 7... Differential gear device 8... Output shaft
9...Input shaft 10.11...Bevel gear 12.13
...Idle gear 14...Gear frame 15...Shaft 16...Throttle lever 17...Throttle wire 18.19...Gear 20...Clutch 21...
・Stepping motor 22...In-vehicle computer

Claims (2)

[Claims] (1) In a throttle body having a throttle shaft rotatably supporting a throttle valve and a throttle lever connected to the throttle shaft, the throttle shaft is connected to an output end of a differential gear device, and The throttle lever is connected to one input end of the differential gear device, and a motor means is connected to the other input end of the differential gear device via a clutch means that is selectively connected or released. A throttle valve control device characterized by: (2) The throttle valve control device according to claim 1, wherein the motor means is a stepping motor that is electronically controlled according to operating conditions.