JPS6082509U

JPS6082509U - Internal combustion engine valve operation switching device

Info

Publication number: JPS6082509U
Application number: JP17541783U
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: 1983-11-15
Filing date: 1983-11-15
Publication date: 1985-06-07

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

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図の一部断面図、第４図は同上装置の駆動油
圧回路の構成図、第５図は本考案の一実施例に適用する
過給機付内燃機関の構成を示す図、第６図Ａは同上実施
例に使用する低速用カムの作動特性を示す図、同図Ｂは
同上実施例に使用する高速用カムの作動特性を示す図、
第７図は本考案の一実施例に係る弁作動切換装置の構成
を示す図である。４２・・・・・・内燃機関、６１・・・・・・カムシャ
フト、６２・・・・・・低速用カム、６３・・・・・・
高速用カム、６４・・・・・田ツカシャフト、６４ａ、
６４ｂ・・・・・・周溝、６４ｃ、６４ｄ・・・・・・
案内溝、６５，６６・・・・・・ギア、６７・・・・・
・ロッカアーム、７０・・・・・・ボール、７１・・・
・・・トリガアクチュエータ。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 a partial sectional view of Fig. 2, and Fig. 4 5 is a diagram showing the configuration of a drive hydraulic circuit of the above device, FIG. 5 is a diagram showing the configuration of a supercharged internal combustion engine applied to an embodiment of the present invention, and FIG. 6A is a diagram showing a low-speed cam used in the above embodiment. Figure B is a diagram showing the operating characteristics of the high-speed cam used in the above embodiment.
FIG. 7 is a diagram showing the configuration of a valve operation switching device according to an embodiment of the present invention. 42... Internal combustion engine, 61... Camshaft, 62... Low speed cam, 63...
High speed cam, 64... Tatsuka shaft, 64a,
64b... Circumferential groove, 64c, 64d...
Guide groove, 65, 66...Gear, 67...
・Rocker arm, 70...Ball, 71...
...Trigger actuator.

Claims

[Scope of utility model registration request]

Move the rocker arm in the axial direction of the rocker shaft,
intake/exhaust valves that are driven via the rocker arm by selectively engaging one of a pair of cams with different profiles arranged in parallel in the axial direction of a camshaft arranged parallel to the rocker shaft; A valve operation switching device for an internal combustion engine is provided with means for rotating a rocker shaft about an axis in conjunction with a camshaft, and a means for rotating a rocker shaft around an axis in conjunction with a camshaft. A protrusion that moves integrally with the shaft outer peripheral wall is provided on one side, and a pair of circumferential grooves that engage with the protrusion at positions where the rocker arm engages with the pair of cams, respectively, and a rocker arm that is free from the rocker arm. a pair of guide grooves that connect the circumferential grooves and that are capable of engaging with the protruding body during a lift period and that are inclined in a direction opposite to the axial direction of the rocker shaft; and a rocker arm based on a valve operation switching signal. and a trigger means for applying a biasing force in the direction of switching movement, and when the valve operation is switched, the protruding body switches from one circumferential groove to the other circumferential groove through the guide groove, thereby causing the protruding body to An internal combustion engine valve operation switching device characterized in that a rocker arm moves in the axial direction following the movement of the rocker arm to switch engagement with a cam.