JPH0559967A - Throttle driving device for internal combustion engine - Google Patents

Abstract

PURPOSE:To provide a throttle driving device wherein a throttle opening regulating means is operated when abnormality occurs under cruise control by composing an actuator which drives a disc serving as a throttle opening regulating means of a small-sized motor. CONSTITUTION:Under cruise control, a disc 8 is moved in a closing direction of a throttle valve 2 by means of a motor M2 operated independently on an acceleration operating system. An adjusting range of opening of a throttle 2 is widened, and in the widened range, the opening of the throttle valve 2 is adjusted by means of a motor 1. When the cruise control is released, the widening condition of the opening adjustment range of the throttle valve by means of the motor M2 is released by the operation of a brake pedal 22. The throttle valve 2 is regulated to a release limit opening by a notch 8a of the disc 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle drive device for an internal combustion engine, and more particularly to a throttle drive device that releases a throttle regulating member during vehicle speed control.

[0002]

2. Description of the Related Art Conventionally, as a control device of a throttle valve for adjusting the intake air amount of an internal combustion engine, Japanese Patent Laid-Open No. 2-22 has been disclosed.
As disclosed in Japanese Patent No. 1642 and Japanese Patent Laid-Open No. 2-157433, it is possible to adjust the opening of a throttle valve by both an accelerator operating system operated by a driver and an electric operating system driven by a controller. Things are known.

[0003]

In such a conventional throttle drive system, when the opening degree of the throttle valve is cruise controlled (vehicle speed control) by an electric operation system without being limited by the operation amount of the accelerator lever, the throttle Another actuator is required to release the restriction member, which complicates the structure.

The problem to be solved by the present invention is to provide a throttle drive device in which the actuator for releasing the throttle opening restricting member is composed of a small motor so that the throttle restricting member operates when an abnormality occurs during cruise control. The purpose is to provide.

[0005]

To achieve the above object, a throttle drive system according to the present invention is provided with an accelerator operating system operated by a driver to control the opening of a throttle valve for adjusting the intake air amount of an internal combustion engine. A throttle drive device for an internal combustion engine, which is adjustable by both an electric operation system driven by a control device, a throttle valve, a first urging means for urging the throttle valve in an opening direction, and the throttle valve. And a restricting member that engages with a member that moves in the opening direction together and that restricts the opening direction limit opening degree of the throttle valve,
Second urging means for urging the restriction member in the closing direction of the throttle valve, and moving the restriction member in the opening direction against the second urging means in accordance with the operation amount of the driver, The accelerator operation means for adjusting the opening degree of the throttle valve is engaged with a member that moves in the opening direction together with the throttle valve, and the opening degree of the throttle valve is adjusted within a range not more than the opening degree regulated by the regulating member. And a second driving means for expanding the throttle valve opening adjustment range by the first driving means by moving the regulating member in the opening direction of the throttle valve independently from the accelerator operating system. When,
And a release means for releasing the throttle valve opening direction limit opening regulation state by the regulation member.

[0006]

According to the throttle driving device of the present invention, during cruise control, the regulating member is moved in the opening direction of the throttle valve by the second driving means that operates independently of the accelerator operation, and the opening adjustment range of the throttle valve is adjusted. Expand,
The opening of the throttle valve is adjusted by the first drive means within the expanded opening range. When the cruise control is released, the releasing means operates to release the expanded state of the throttle valve opening adjustment range by the second driving means, and the restricting member returns the throttle valve to the opening limit opening state.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment in which the present invention is applied to a throttle drive device that adjusts the intake air amount of a gasoline engine.
In FIG. 1, a throttle valve 2 that opens and closes an air passage formed inside a cylindrical throttle body 1 is fixed to a shaft 3. Disc 4 fixed to shaft 3
Is urged by the tension spring 5 in the throttle valve opening direction. Although not shown in FIG. 1, as shown in FIG.
Of the motor M1.
Of the pinion gear 44. The rack 40 is biased by a tension spring 42 in the throttle valve opening direction. Further, as shown in FIG. 1, the disc 4 has a notch 4b.
Are formed.

The shaft 6 which is separated from the shaft 3 and is provided coaxially therewith is provided with a disc 8 at one end on the shaft 3 side, and a notch 8a is provided on the side of the disc 8 facing the disc 4. The notch 4b is formed so as to be able to abut. As a result, the notch 4b does not move to the throttle opening side with respect to the notch 8a. A tension spring 9 is attached to the disc 8 in the throttle valve closing direction. Further, one end 13a of the wire 13 is fixed to the disk 8, and the other end 13b is fixed to the one end 12a side of the fulcrum a of the accelerator pedal 12. The tension spring 14 is attached to the one end 12a.
One end of is fixed. This tension spring 14
Wire 1 when the accelerator pedal 12 is released
The wire 13 is tensioned so that the wire 3 does not sag. When the accelerator pedal 12 is stepped on, the accelerator pedal 12 rotates around the fulcrum a against the tension spring 9, the wire 13 moves in the direction of the arrow opening large amount shown in the drawing, and the throttle opening is resisted against the tension spring 9. The disk 8 rotates in the large degree direction. Further, the disk 8 is formed with a window 8b into which one end 36a of a pin 36 shown in FIG.

As shown in FIG. 1, the gear 16 is supported on the shaft 6 by a bearing 15 fixed to the center thereof so as to be rotatable and axially movable. As shown in FIG. 2, a pin 36 that is rotatable around a fulcrum 34 is attached to the gear 16, and one end 36a of this pin 36 can be fitted into the window 8b. The pin 36 urges one end 36a of the pin 36 by the compression spring 32 toward the window 8b in the fitting direction. The other end 36b of the pin 36 is connected to the disc 2
It sticks out to the 0 side. When the disc 20 moves from the position shown in FIG. 2 to the disc 16 side, the end face 20 a moves to the end 36 of the pin 36.
B is pressed against the compression spring 32, and the one end 36a of the pin 36 releases the engagement with the window 8b. The diagonal teeth 16b formed on the outer periphery of the gear 16 mesh with the worm gear 38 of the motor M2. The gear 16 meshing with the worm gear 38 is rotatable with respect to the shaft 6 in response to the rotation of the motor M2.

The disc 20 has a shaft hole 20a formed in the center thereof inserted into the shaft 6 and is slidable in the axial direction with respect to the shaft 6. And the disc 20 is the gear 1
It is covered from above 6. When the brake pedal 22 is depressed, the lever 22a rotates around the shaft 24 as a central axis, pulls the wire 26 in the direction of the arrow in the drawing, pulls up the rod 31 connected to one end 26a of the wire, and resists the compression spring 28. Lever 31 is pulled upward. Then, the arm 30 rotates around the shaft 29 in the direction of the arrow in the figure against the urging force of the compression spring 28, so that the one end 30a becomes
The pressing portion 20b of the disc 20 is pressed to move the disc 20 to the gear 16
Press on.

A control unit (ECU) 50 inputs a sensor signal for detecting the operation amount of each of the accelerator pedal 12 and the brake pedal 22 and other operating state signals of a sensor (not shown) or the like, and performs arithmetic processing based on these signals. As a result, a drive signal is sent to the motor M1 based on the processing result. Disc 2 when the brake pedal 22 is not depressed
0 is separated from the gear 16 as shown in FIG. At this time, one end 36a of the pin 36 is fitted into the window 8b by the urging force of the compression spring 32. Window 8
Since b and one end 36a of the pin 36 are locked, the disc 8 cannot rotate in the throttle valve closing direction side with respect to the gear 16, but can rotate in the throttle valve opening direction side.

When the brake pedal 22 is stepped on, the disk 20 pressed by the arm 30 moves leftward in FIG. 2, the end face 20a presses the other end 36b of the pin 36, and the pin 36 is centered around the fulcrum 34. As a result, the pin 36 is rotated clockwise to open one end 36a of the pin 36 from the window 8b. Then, the circular plate 8 becomes free to rotate with respect to the gear 16. As a result, the throttle valve can be controlled by the accelerator pedal 12.

Next, the operation will be described. During normal driving,
When the accelerator pedal 12 is stepped on, the wire 8 is pulled by the wire 13 and the disc 8 rotates toward the large throttle opening direction. Then, since the notch 8a, which is the throttle valve opening position restricting member, moves toward the larger throttle opening direction, the position of the notch 8a defines the limit opening of the throttle valve 2, and the motor M1
The opening degree of the throttle valve 2 is controlled by.

When switching from normal running to cruise control, the accelerator pedal 12 is released and the motor M2 is driven. Then, the gear 16 meshing with the worm gear 38 rotates in the direction of the arrow in FIG. 1, one end 36 a of the pin 36 of the gear 16 is locked by the window 8 b of the disc 8, and the disc 8 resists the tension spring 9. Rotate to the throttle valve maximum opening position. That is, the notch 8a of the disc 8 moves to the maximum opening position, and the opening position regulation of the throttle valve 2 is released. As a result, the opening of the throttle valve 2 can be controlled by the motor M1 to the constant vehicle speed traveling mode.

During cruise control, for example, the motor M
When an abnormality such as excessive rotation of 1 occurs, the brake pedal 22
When is depressed, the wire 26 moves in the direction of the arrow shown in the figure, the disk 20 pressed by the arm 30 moves leftward from the position shown in FIG. 2, and the end face 20a moves to the other end 36b of the pin 36.
Is pressed to release one end 36a of the pin 36 from the window 8b. Then, the disc 8 is rotated counterclockwise by the urging force of the tension spring 9, and the throttle valve opening degree regulation by the notch 8a is started. As a result, the opening angle of the disc 8 corresponding to the amount of depression of the accelerator pedal 12 is obtained, and the disc 4 having the notch 4b that abuts the notch 8a of the disc 8 corresponds to the amount of depression of the accelerator pedal 12. The opening degree of the throttle valve 2 can be obtained.

Next, a second embodiment of the present invention is shown in FIG. FIG. 3 schematically shows members around the throttle. The restriction of the throttle opening by the restriction member is released,
The state in which the throttle valve 2 can be adjusted in both the opening direction and the closing direction by the motor M1 is shown. The second embodiment is an example in which a tension spring 51 for preventing the slack of the accelerator pedal is provided. Since other configurations are substantially the same as those of the first embodiment, the same reference numerals are given to the same components and the description thereof will be omitted.

In another embodiment of the present invention, the motor M2
Instead of this, an ultrasonic motor can be used. The ultrasonic motor can hold the gear 16 at that position if the power supply is cut off, and has an effect that it can be downsized because of its thin body. Although the signal generating means for releasing the maximum opening regulation position of the throttle valve has been described as an example of the operation of depressing the brake pedal in the above embodiment, it may be an operation of turning off the auto drive switch. Further, as the means for releasing the maximum opening regulation position of the throttle valve, an example of a pin is shown in the above-mentioned embodiment, but in the present invention, instead of this, for example, an electromagnetic clutch and a simple energizing circuit may be provided. .. Furthermore, the motor M
When the cruise control is performed, the disc 8 may not be rotated to the throttle valve maximum opening position but may be controlled at a position slightly opened from the throttle valve opening by controlling 2 by the ECU.

[0018]

As described above, according to the throttle drive device of the present invention, the mechanical regulation state of the maximum opening position regulating member of the throttle valve is automatically determined when an abnormality occurs such as when the brake pedal is depressed. It has the effect of being able to release it to improve safety. Further, since the driving of the throttle valve maximum opening position regulating member can be configured by a small motor, there is an effect that the structure can be simplified.

[Brief description of drawings]

FIG. 1 is an exploded view showing a throttle driving device according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a coupling mechanism between a gear and a disc according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 2 throttle valve 4 disc (member) 5 tension spring (first urging means) 8 disc (regulating member) 8b window (opening means) 9 tension spring (second urging means) 12 accelerator pedal (accelerator operation system) 20 disc (opening means) 36 pin (opening means) M1 motor (first driving means) M2 motor (second driving means)

Claims (1)

[Claims] 1. An internal combustion engine in which an opening degree of a throttle valve for adjusting an intake air amount of an internal combustion engine can be adjusted by both an accelerator operation system operated by a driver and an electric operation system driven by a control device. In an engine throttle drive device, a throttle valve, a first urging unit that urges the throttle valve in an opening direction, and a member that moves in the opening direction together with the throttle valve are engaged to limit the opening direction of the throttle valve. A restricting member that restricts the opening degree, a second urging unit that urges the restricting member in the closing direction of the throttle valve, and a restricting member that opposes the second urging unit according to an operation amount of a driver. And the throttle opening is moved in the opening direction to adjust the opening of the throttle valve, and the member that moves together with the throttle valve in the opening direction is engaged to adjust the opening of the throttle valve. A first drive means for adjusting the opening within a range regulated by a material or less, and the control member is moved in the opening direction of the throttle valve independently of the accelerator operation so that the throttle valve operated by the first drive means A throttle drive device for an internal combustion engine, comprising: a second drive means for expanding an opening degree adjustment range; and a release means for releasing a throttle valve opening direction limit opening degree regulation state by the regulation member.