JPH01150063A - Throttle actuator - Google Patents

Abstract

PURPOSE:To eliminate interference of a motor in its driving power with an accelerator pedal in its driving power by opening and closing a throttle valve by a pneumatic driving gear through an output shaft while by rotary driving power of the motor through a housing. CONSTITUTION:An output shaft 21, connected to a valve shaft of a throttle valve, is rotatably supported to a housing 22. A pneumatic driving gear 29, associated with an accelerator pedal, is provided in a frame 28 outside the housing 22 through a swivel joint 34. A motor 40 meshes its output gear 41 with a gear provided in the housing 22. Thus preventing the motor in its driving power and the accelerator pedal in its driving power from interfering with each other, further the throttle valve can be prevented from biting in a body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a throttle actuator for controlling engine output of an automobile.

[Conventional technology]

FIG. 6 shows a conventional throttle actuator disclosed in, for example, Japanese Unexamined Patent Publication No. 61-215436. In the figure, 1 is a differential gear, and 2.3 is another pair of opposing gears 5. A pair of gears are meshed with .6 and rotatably supported on the shaft 4; 7 is a motor that rotationally drives one gear 2 of the differential gear 1 via a gear 8; 9 is an accelerator pedal; The depression force of this pedal 9 passes through an accelerator wire 10, a pulley 11 and a gear 12, and rotates the other gear 3 of the differential gear 1. 13 is a gear attached to a shaft 14 that supports a gear 5.6, and a gear 15 that meshes with this gear 13.
The throttle valve 16 is opened and closed via the throttle valve 16.

In the above-mentioned throttle actuator, when the accelerator pedal 9 is depressed, the accelerator wire 10 is pulled and the pulley 11
At the same time, the gear 12 is rotated to rotationally drive the gear 3. Here, if the motor 7 is stopped, the gear 3 rotates, and this rotational force passes from the gear 13 to the gear 15 to open and close the throttle valve 16. Therefore, by operating the motor 7 and the accelerator pedal 9 simultaneously, the driving force of both is transferred to the gear 13.
The driving force of the gear 13 is the sum or difference of both.

[Problem that the invention seeks to solve]

The conventional throttle actuator is configured as described above, and uses the driving force from the motor 7 and the accelerator pedal 9.
Since the driving force is applied in parallel to the same gear, when the motor 7 rotates, the reaction force is transmitted to the accelerator pedal 9. For this reason, when the driver puts his foot on the accelerator pedal 9, he can feel that the force applied to the accelerator pedal changes depending on the rotation of the motor, giving him a bad driving feeling (
There was a problem. Further, if the accelerator pedal 9 is suddenly depressed while the throttle valve 16 is being moved by the motor 7 for a certain amount of time, the throttle valve 16 may become jammed into the body 17. If a stopper is provided to prevent this jamming, there is a problem in that the stroke of pressing the accelerator becomes shorter, which impairs the accelerator feeling.

This invention was made to solve the above-mentioned problems, and the driving forces of the motor and the accelerator pedal do not interfere with each other, and the throttle valve is prevented from being caught in the body. The purpose is to obtain a throttle actuator.

[Means for solving problems]

In the throttle actuator according to the present invention, a pneumatic drive device that can move forward and backward in conjunction with an accelerator pedal is connected to a frame via a universal joint, and the frame rotates a drum of an output shaft supported in a housing to operate a throttle valve. The housing is driven by a motor to rotate together with the output shaft to open and close the throttle valve.

[For production]

In this invention, when the pedal force of the accelerator pedal advances or retreats the pneumatic drive device, the drum engaged with the linearly moving frame rotates to open and close the throttle valve via the output shaft. On the other hand, the rotational driving force of the motor rotates the housing together with the output shaft through gears to open and close the throttle valve.

This prevents reaction forces from acting on both the accelerator pedal and the driving force from the motor.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a sectional view of the throttle actuator according to the present invention. In the figure, 21 is an output shaft connected to a valve shaft of a throttle valve (not shown), and is rotatably supported by a housing 22 via a bearing 23. . 24 is a drum provided on the output shaft 21, and a spiral groove 25 is formed on the surface of the drum 24. Reference numeral 26 denotes a ring that moves back and forth in the axial direction on the drum 24, and a bottle 27 protruding from this ring 26 is inserted into the spiral groove 25 of the drum 24 as shown in FIG.
is engaged in. Reference numeral 28 denotes a frame connected to the ring 26, which is pulled out of the housing 22 and can move forward and backward in the axial direction. 29 is a pneumatic drive device connected to the rear end of the frame 28, and is interlocked with the accelerator pedal.

A casing 30 of the drive device 29 is divided into two air chambers 32 and 33 by a diaphragm 31, and one end of the iron 35 is connected to the diaphragm 31, and the other end of the iron 35 is connected to the frame 28 with a universal joint 34. 36 is a spring that returns the diaphragm 31 to its original position, and 37.38 is an air inlet/outlet of the air chamber 32.33. 39 is a gear provided in the housing 22, and a motor 40 is connected to this gear 39.
The output gears 41 of are in mesh with each other.

Figure 3 is a configuration diagram for installing the above-mentioned throttle actuator on the engine and controlling the throttle valve.
2 is a throttle actuator that opens and closes the throttle valve 16; 43 is an accelerator sensor that detects the amount of depression of the accelerator pedal 9; and 44 is a control device that controls the throttle actuator 42 based on a signal from the accelerator sensor 43.

Next, the operation will be explained. When the motor 40 is stopped and the air is removed from the air chamber 32 through the air inlet/outlet 37 of the drive device 29, a pressure difference is created in the rain air chambers 32 and 33. As a result, the diaphragm 31 pushes the lever 35 toward the air chamber 32 to a position where it balances with the spring force of the spring 36.
The ring 26 is advanced together with the frame 28. For this reason, the pin 27 of the ring 26 engages with the spiral groove 25 of the drum 24, so the drum 24 rotates and the throttle valve 16 opens via the output shaft 21. Conversely, the pressure in the air chamber 32 increases and the air chamber When the pressure of the diaphragm 33 is lowered, the diaphragm 31 moves toward the air chamber 33, moves the frame 28 back together with the rod 35, reverses the drum 24, and closes the throttle valve via the output shaft 21. On the other hand, when the motor 40 is driven, the housing 22 is rotated through the gears 41 and 39, whereby the output shaft 21 is also rotated together with the housing 22, and the opening and closing of the throttle valve can be controlled. That is,
The total rotation angle of the output shaft 21 is the sum or difference between the rotation angle by the drive device 29 and the rotation angle of the housing 22 by the motor 40. Note that the rotation of the housing 22 is controlled by the frame 2.
8 and the rod 35 of the drive device 29 are connected by the universal joint 34, the drive device W29 is not rotated.

In the above embodiment, the housing 22 is rotated by the motor 40, but the housing 22 may be driven directly by a wire from the accelerator pedal 9. Further, the combination of the drum 24 and the ring 26 is made by combining a spiral strip 24a or groove formed on the drum 24 and a groove 24 formed on the ring 26, as shown in FIG.
Alternatively, as shown in FIG. 5, a plurality of spiral grooves 25 may be provided on the drum 24, and the pin 27 of the ring 26 may be engaged with the multiple grooves 25. However, there are no limitations on the configuration as long as it converts linear motion into rotational motion.

〔Effect of the invention〕

As explained above, according to the present invention, the linear motion of the rod by the pneumatic drive device is converted into rotational motion to open and close the throttle valve via the output shaft, and the rotational driving force of the motor is transmitted via the housing. Since the output shaft is rotated to open and close the throttle valve, the two driving forces do not interfere with each other, resulting in a throttle actuator with a good feel. In addition, since the drive device is pneumatic, a cushioning effect occurs when the throttle valve hits the body, so the throttle valve does not get caught in the body.Furthermore, the air chamber of the drive device is opened to atmospheric pressure. Then, the diaphragm returns to the intermediate position, so if an abnormality occurs in the control device, the air chamber is opened to the atmosphere and returns to a non-controlled state, allowing manual control and ensuring safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a throttle actuator according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. FIG. 5 is a perspective view of other examples showing the relationship between the drum and the ring, and FIG. 6 is a configuration diagram of a conventional throttle actuator. 9...Accelerator pedal, 16...Throttle valve, 2
DESCRIPTION OF SYMBOLS 1... Output shaft, 22... Housing, 24... Drum, 25... Spiral groove, 26... Ring, 27...
・Pin, 28... Frame, 29... Drive device, 3
1...Diaphragm, 34...Universal joint, 35.
...Rod, 39...Gear, 40...Motor. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] An output shaft connected to the valve shaft of the throttle valve is rotatably supported by a housing, and a spiral groove is formed on the surface of a drum provided on the output shaft. An integral frame is pulled out of the housing along the direction of the output shaft, and a pneumatic drive device is provided on the frame outside the housing to interlock with an accelerator pedal that moves the frame forward and backward through a universal joint, and the housing is connected to a gear. A throttle actuator comprising a motor that rotates through the throttle actuator.