JPS6088012U

JPS6088012U - Internal combustion engine valve operation switching device

Info

Publication number: JPS6088012U
Application number: JP17999083U
Authority: JP
Inventors: 学加藤; 俊一青山; 敬士藤井
Original assignee: 日産自動車株式会社
Priority date: 1983-11-24
Filing date: 1983-11-24
Publication date: 1985-06-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本願出願人により出願済の弁作動切換装置の一
例を示す平面断面図、第２図は同上装置の縦断面図、第
３図は第２図の要部拡大断面図、第４図Ａは本考案の一
実施例の低速時の吸気弁開弁特性を示す図、同図Ｂは同
じく高速時の吸気弁開弁特性を示す図、第５図Ａは同上
実施例の要部構成を示す平面図、同図Ｂは同じく正面図
、同図Ｃは同図ＢのＡ矢視図である。３１・・・・・・ロッカシャフト、３２・・・・・・ロ
ッカアーム、３３・・・・・・カムシャフト、３４・・
・・・・低速用カム、３５・・・・・・高速用カム、３
６・・・・・・吸気弁、３６Ａ・・・・・・弁軸。（Ｂ）刈　　　　　　　　　　　　　　比だ、丁孔犬・Fig. 1 is a plan sectional view showing an example of a valve operation switching device applied for by the applicant, Fig. 2 is a longitudinal sectional view of the same device, Fig. 3 is an enlarged sectional view of the main part of Fig. 2, and Fig. 4 is a longitudinal sectional view of the same device. Figure A is a diagram showing the intake valve opening characteristics at low speeds of an embodiment of the present invention, Figure B is a diagram showing the intake valve opening characteristics at high speeds, and Figure 5A is the main part of the same embodiment. A plan view showing the configuration; FIG. B is a front view, and C is a view taken in the direction of arrow A in FIG. B. 31...Rocker shaft, 32...Rocker arm, 33...Camshaft, 34...
...Low speed cam, 35...High speed cam, 3
6... Intake valve, 36A... Valve shaft. (B) Karihida, Dingukou dog.

Claims

[Scope of utility model registration request]

A rocker arm for operating intake and exhaust valves provided on a rocker shaft and a pair of cams with different lift amounts arranged in parallel in the axial direction of a camshaft arranged parallel to the rocker shaft are moved relative to each other in the axial direction to operate the rocker arm. In a valve operation switching device for an internal combustion mechanism that switches the operation of an intake/exhaust valve by selectively engaging one of the pair of cams, the center of engagement between the rocker arm and the cam on the larger lift amount side. The amount of offset in the axial direction of the rocker shaft from the center of engagement with the valve shaft of the intake/exhaust valve is the same as the amount of offset in the axial direction of the rocker shaft from the center of engagement between the rocker arm and the cam on the smaller lift side. 1. A valve operation switching device for an internal combustion engine, characterized in that a pair of cams and valve shafts of intake and exhaust valves are arranged at positions that are smaller than the amount of offset in the axial direction of the rocker shaft to the alignment center.