JPH0514542U - Throttle valve opening control device - Google Patents

Abstract

(57) [Summary] [Objective] The troublesomeness during the assembly process of the throttle valve opening control device is eliminated without increasing the height dimension of the negative pressure actuator of the throttle valve opening control device, and at the same time the cost is reduced. To measure. [Structure] A bracket for supporting a rotating shaft of a throttle valve lever urged in the opening direction of the throttle valve and a rotation shaft of an accelerator lever urged in the closing direction and abutting in the circumferential direction is integrally formed with a casing of a negative pressure actuator. Molded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a throttle valve lever fixed to a rotary shaft of a butterfly throttle valve arranged in an intake passage of an engine and biased in a direction to open the throttle valve is biased in a direction to close the throttle valve to accelerate an accelerator The throttle lever comes into contact with the accelerator lever which is rotated by the operation in the circumferential direction, and the accelerator is operated following the accelerator lever, and the throttle valve is closed from the rotational position where the accelerator is operated via the negative pressure actuator. The present invention relates to a computer controlled throttle valve opening control device.

[0002]

[Prior Art]

 FIG. 2 is a cross-sectional view showing the structure of the throttle valve opening control device proposed by Japanese Patent Application No. 1-307769, wherein reference numeral 1 is an engine intake passage, and 2 is a butterfly throttle valve (hereinafter simply referred to as throttle valve). (3) 3 is a throttle valve lever that is biased in the direction to open the throttle valve 2, 4 is an accelerator lever that is biased in the direction to close the throttle valve 2, 5 is an accelerator cable, and 6 is The throttle shaft has a center line on the same straight line as the rotation shaft of the throttle valve 2, and the rotation shaft of the accelerator lever is a separate body from the rotation shaft of the throttle valve 2, and 7 is the throttle valve lever. 3 is a computer-controlled negative pressure actuator that acts in a direction in which the throttle valve 2 is closed rather than a rotational position by operating the accelerator. 3 and 4 are explanatory views of the operation of the throttle valve opening control device having the configuration of FIG. 2, and the same reference numerals as those in FIG. Of the negative pressure chamber 7-1 and the negative pressure source are cut off by a first solenoid valve, and 9 is a second solenoid valve which shuts off the negative pressure chamber 7-1 and the atmosphere. To input the rotation speed signals of the front and rear wheels of the vehicle equipped with the engine, calculate the slip between the wheels and the road surface from the difference in rotation speed, and reduce the engine output until the slip does not occur. The first solenoid valve 8 or the second solenoid valve 9 is turned on / off to control the negative pressure of the negative pressure chamber 7-1, thereby partitioning the atmospheric pressure chamber 7-2 and the negative pressure chamber 7-1. The diaphragm 7-3 is pulled up against the spring 7-4, and one end is fixed to the diaphragm 7-3. The long hole formed in the upper part pulls up the operating member 7-5 engaged with the pin 3-1 of the throttle valve lever 3, and the engagement piece 3-2 of the throttle valve lever 3 and the accelerator lever 4 are engaged. The contact with the piece 4-1 in the circumferential direction is released, and the throttle valve lever 3 is rotated in the direction in which the throttle valve 2 is closed from the rotational position where the accelerator is operated.

FIG. 3 shows a state in which the throttle valve 2 is at an intermediate opening degree and the actuator 7 is not operating at all, and the pin 3-1 of the throttle valve lever 3 is in the long hole 7-6 of the operating member 7-5. Since it is located at the center of the throttle valve 3, the throttle valve lever 3 can rotate following the accelerator lever 4 over the entire range of the throttle valve 2 from fully closed to fully opened.

In FIG. 4, even when the accelerator lever 4 is in the same state as in FIG. 3, the negative pressure in the negative pressure chamber 7-1 of the actuator 7 becomes strong corresponding to the state of the vehicle, and the operating member 7-5 is In the figure, it shows the state in which the throttle valve 2 is pulled upward and the throttle valve 2 is closed via the throttle valve lever 3.

Returning to FIG. 2, the bracket 11 supporting the rotating shaft 6 of the accelerator lever is coupled to the housing 12 forming the intake passage 1 by screw members 13 and 14, and the negative pressure actuator 7 is After the bracket 11 is coupled to the housing 12 forming the intake passage 1, the bracket 11 and the housing 12 forming the intake passage 1 are assembled on the upper surface, and a negative pressure is first applied to the upper surface by a screw member. The case 7-7 of the actuator 7 is assembled, the diaphragm 7-3 on which the operating member 7-5 is fixed is mounted, the spring 7-4 is mounted, and the lid 7-8 is mounted on the case 7 of the negative pressure actuator 7. 7-7. The bracket 11 or the casing 12 forming the intake passage 1 must be tightened by a screw member, which makes the assembly work of the throttle valve opening control device complicated. is there.

As a measure for solving the problem of the configuration of FIG. 2, the configuration shown in FIG. 5 has been implemented. In this configuration, the housing 7-7 and the lid 7-8 of the negative pressure actuator 7 are both press-molded, and the housing 7-7 and the lid 7-8 are joined by caulking to form the negative pressure actuator 7. After completion of assembly, the collar plate 7-9 brazed to the bottom of the housing 7-7 is fixed to the bracket 11 and the upper surface of the housing 12 forming the intake passage 1 by a screw member. Reference numeral 7-10 indicates a portion where the housing 7-7 of the negative pressure actuator 7 and the lid 7-8 are crimped. Although the complexity of the assembly process of the throttle valve opening control device has been eliminated by the above configuration, since the negative pressure actuator 7 enables caulking work between the housing 7-7 and the lid 7-8, the collar plate 7 is used. -9 and the swaged portion 7-10 require a certain distance d and become taller, resulting in a disadvantage in the layout of the vehicle or the engine, and the diaphragm 7- There was a problem that the vibration of No. 3 increased and the durability was impaired.

[0007]

[Problems to be solved by the device]

 To obtain a throttle valve opening control device that eliminates the complexity of the assembly process of the throttle valve opening control device without increasing the height of the negative pressure actuator and reduces the number of parts to reduce the cost. Is the subject of the present invention.

[0008]

[Means for Solving the Problems]

 The throttle valve lever, which is fixed to the rotating shaft of the butterfly throttle valve arranged in the intake passage of the engine and is biased in the opening direction of the throttle valve, is biased in the closing direction of the throttle valve by the accelerator operation. It is operated in contact with a rotating accelerator lever in the circumferential direction, following the accelerator lever, and is computer-controlled via a negative pressure actuator in a direction in which the throttle valve is closed from the rotational position where the accelerator is operated. A housing of the negative pressure actuator of the throttle valve opening control device is integrally formed with a bracket that supports a rotating shaft of the accelerator lever that is coupled to a housing that forms the intake passage by a screw member.

[0009]

[Action and effect]

 Since the assembly of the throttle valve opening control device can be completed by connecting the bracket side subassembly to which the negative pressure actuator is assembled to the housing forming the intake passage, it is possible to increase the height of the negative pressure actuator. Therefore, it is possible to simplify the work process without compromising the durability of the diaphragm without any layout disadvantage, and the cost is reduced by reducing the number of parts.

[0010]

【Example】

 FIG. 1 is a cross-sectional view showing an embodiment of a throttle valve opening control device of the present invention, which is directed from a housing 12 in which an intake passage 1 is formed to a bracket 11 supporting a rotating shaft 6 of an accelerator lever 4. The intake passage 1 is integrally formed with the protruding portion 11-1 on the side of the bracket 11 which is attached to the end surface of the protruding portion 12-1 and is fastened by the screw member 13 from the protruding portion 11-1. The housing 7-7 of the negative pressure actuator 7 extends in an annular shape on the housing 12 side where is formed. A rotary shaft 6 of an accelerator lever to which an accelerator lever is fixed and a spring 15 for urging the rotary shaft 6 in the direction of closing the throttle valve are attached to the bracket 11, and are integrally formed with the bracket 11. After mounting the diaphragm 7-3 on the housing 7-7 of the negative pressure actuator 7, mounting the spring 7-4 and tightening the lid 7-8 with the screw member, the negative pressure actuator 7 is assembled, and then the bracket 11 is connected to a housing 12 in which the intake passage 1 is formed by screw members 13 and 14, and a negative pin is attached to a pin 3-1 standing on a throttle valve lever 3 assembled in the housing 12. The long hole 7-6 (FIG. 3) of the actuating member 7-5 of the pressure actuator 7 is engaged to complete the assembly of the throttle valve opening control device.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a throttle valve opening control device of the present invention.

[Fig. 2] Conventional configuration example of throttle valve opening control device

3 is an explanatory view of the operation of the throttle valve opening control device of FIG.

FIG. 4 is an operation explanatory view of the throttle valve opening control device of FIG.

FIG. 5: Another conventional configuration example of the throttle valve opening control device

[Explanation of symbols]

 1 Intake passage 2 Butterfly-shaped throttle valve 3 Throttle valve lever 4 Accelerator lever 5 Accelerator cable 6 Accelerator lever rotating shaft 7 Negative pressure actuator 7-7 Negative pressure actuator housing 11 Bracket that supports the accelerator lever rotating shaft

Claims (1)

[Scope of utility model registration request] 1. A throttle valve (2) fixed to a rotary shaft of a butterfly throttle valve (2) arranged in an intake passage (1) of an engine.
The throttle valve lever (3), which is biased in the opening direction, comes into circumferential contact with the accelerator lever (4), which is biased in the closing direction of the throttle valve (2) and is rotated by an accelerator operation. The throttle valve opening, which is operated by the accelerator following the lever (4) and is computer-controlled via the negative pressure actuator (7) in the direction of closing the throttle valve (2) from the rotational position where the accelerator is operated. A control device, wherein the housing (7-7) of the negative pressure actuator (7) is coupled to a housing (12) forming the intake passage (1) by screw members (13, 14). A throttle valve opening control device integrally formed with a bracket (11) that supports a rotation shaft (6) of a lever (4).