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Bypass intake amount controller

A control device and air intake technology, which is applied in the direction of electrical control, idle speed device, electromechanical device, etc., can solve the problems of stepping motor capacity increase, motor can not be miniaturized, and screw mechanism is difficult to move, so as to reduce size, Effects of suppressing leakage and improving control accuracy

Inactive Publication Date: 2003-08-20
KEIHIN CORP
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AI Technical Summary

Problems solved by technology

Therefore, when the engine is tempered, a part of the external thread will be exposed to the tempered gas, and foreign matter such as carbon powder will adhere to the external thread. Since this foreign matter will be inserted between the internal and external threads, it may cause the action of the screw mechanism. produce difficulties
In addition, since the valve piston and the outlet hole are arranged on the same axis, there will be a high engine intake negative pressure acting on the front face of the valve piston from the outlet hole, and the thrust of this negative pressure acting on the valve piston will become a step The load of the stepping motor is very large, so that the capacity of the stepping motor has to be increased, so there is a disadvantage that the motor cannot be miniaturized

Method used

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Embodiment Construction

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0031] First, from Figure 1 ~ Figure 3 The first embodiment of the invention shown begins. figure 1 Among them, the throttle valve body 1 has an intake runner 2 that runs through its central part and communicates with the intake port of the engine. The throttle valve 3 used to switch the central part of the intake runner 2 is pivotally supported on the throttle body. Flow valve body 1. In addition, a bypass passage 4 that bypasses the throttle valve 3 and communicates with the intake air passage 2 is formed on the throttle valve body 1. In the middle of the bypass passage 4, a bypass valve for switching the passage is provided. 5.

[0032] Such as figure 2 As shown, the valve housing 6 of the bypass valve 5 is embedded in the installation hole 7 of the throttle valve body 1, and inserted into the middle part of the bypass passage 4 through the sealing parts 8, 9, ...

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Abstract

In a bypass intake control system, a bypass valve (5) is formed from a valve housing (6) having a valve hole (10), an inlet port (11) connecting to the upstream side of a bypass (4) and an outlet port (12) connecting to the downstream side of the bypass (4), and a valve piston (13) fitted in the valve hole (10) in a slidable and non-rotatable manner, the valve piston (13) being linked to an output shaft (23) projecting out of an end surface of a rotor (22) of a stepping motor (14) via a screw mechanism (29) on the side opposite to the bypass (4) relative to sliding surfaces of the valve housing (6) and the valve piston (13). It is thereby possible to prevent the screw mechanism from being exposed to backfire gas. The engine negative boost pressure does not impose a high load on the stepping motor thus making it possible to reduce the capacity of the motor. <IMAGE>

Description

technical field [0001] The present invention relates to a bypass type air intake volume control device for controlling the idling speed of the engine, in particular to a throttle valve connected to the air intake passage of the throttle body to bypass the intake passage. A bypass channel, in which a bypass valve for switching the bypass channel is provided, and a stepping motor driving the bypass valve is connected to the bypass valve through a screw mechanism. Improvement of gas volume control device. Background technique [0002] Such a bypass-type air intake control device is known in the art, for example, as disclosed in Japanese Patent Laid-Open No. Sho 59-34444. [0003] In the past bypass-type air intake control device, as disclosed in the above-mentioned bulletin, the screw mechanism is formed in such a way that it is composed of a valve piston and a valve housing. The valve piston cannot rotate relatively, but can move axially. The way of movement is connected wit...

Claims

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Application Information

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IPC IPC(8): F02D9/02F02D9/10F02D41/00F02M3/07F02M23/00H02K7/06
CPCY02T10/146F02D2400/18H02K7/06F02D9/1055F02D31/005F02M3/07F02M69/32F02D2009/0252F02M23/006Y02T10/12
Inventor 铅隆司秋山裕茂
Owner KEIHIN CORP
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