JPS6173041U

JPS6173041U -

Info

Publication number: JPS6173041U
Application number: JP15682484U
Authority: JP
Priority date: 1984-10-17
Filing date: 1984-10-17
Publication date: 1986-05-17

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例に係る多気筒エン
ジンのアイドル回転数調整機構の縦断面図、第２
図は、本考案の一実施例に係るアイドル回転数調
整機構を備えた多気筒エンジンの全体図、第３図
は、従来のアイドル回転数調整機構を備えた多気
筒エンジンの全体図、第４図は、従来の多気筒エ
ンジンのアイドル回転数調整機構の縦断面図であ
る。１，２，３，４……吸気通路、５……スロツト
ル弁、６……アイドルアジヤストスクリユー、１
０……多気筒エンジンのアイドル回転数調整機構
、１１……多気筒エンジン、１２……空洞、１３
……空洞と空気通路との接続部分、１４……吸気
通路郭定部材、２１……空気通路、２２……連通
孔、２８……スロツトル弁の下流、３１……アイ
ドルアジヤストスクリユーのテーパ部分。 FIG. 1 is a vertical cross-sectional view of an idle speed adjustment mechanism for a multi-cylinder engine according to an embodiment of the present invention, and FIG.
3 is an overall view of a multi-cylinder engine equipped with an idle speed adjustment mechanism according to an embodiment of the present invention, FIG. 3 is an overall view of a multi-cylinder engine equipped with a conventional idle speed adjustment mechanism, and FIG. The figure is a longitudinal sectional view of a conventional idle speed adjustment mechanism for a multi-cylinder engine. 1, 2, 3, 4...Intake passage, 5...Throttle valve, 6...Idle adjustment screw, 1
0... Idle rotation speed adjustment mechanism of multi-cylinder engine, 11... Multi-cylinder engine, 12... Cavity, 13
... Connecting portion between the cavity and the air passage, 14... Intake passage defining member, 21... Air passage, 22... Communication hole, 28... Downstream of the throttle valve, 31... Taper of idle adjustment screw part.

Claims

[Scope of utility model registration request]

An idle rotation speed adjustment mechanism that adjusts the idle rotation speed of a multi-cylinder engine in which a throttle valve is provided in each intake passage communicating with each cylinder, An intake passage is provided in an intake passage defining member, and a cylindrical cavity is provided in the intake passage defining member in the vicinity of each intake passage downstream of the throttle valve. , the intake passage defining member is provided with a communication hole through which each intake passage existing downstream of the throttle valve communicates with the cavity, and the axis of the cavity is a straight line, and , the axis of the cavity is substantially perpendicular to the axis of each intake passage located downstream of the throttle valve, and the lengths of each of the communication passages are approximately equal; The cavity and the atmosphere are communicated with each other by an air passage, and an idle adjust screw is disposed at a connecting portion between the cavity and the air passage, and the idle adjust screw is connected to the intake passage enclosure. The idle adjusting screw is rotatably attached to a fixed member, and the tip of the idle adjusting screw is tapered, so that when the idle adjusting screw is rotated, the idle adjusting screw is rotated. An idle rotation speed adjustment mechanism for a multi-cylinder engine, characterized in that the idle rotation speed is adjusted by making the effective flow cross-sectional area of the connecting portion between the cavity and the air passage variable in the tapered portion. .