JPS58191306U

JPS58191306U - Internal combustion engine intake and exhaust valve drive device

Info

Publication number: JPS58191306U
Application number: JP9045582U
Authority: JP
Inventors: 誠之助原; 薫片山; 松本　泰郎
Original assignee: 日産自動車株式会社
Priority date: 1982-06-17
Filing date: 1982-06-17
Publication date: 1983-12-19

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図は従来の吸排気弁駆動装置を示すその概略正面断
面図、第２図はこの考案に係る内燃機関の吸排気弁駆動
装置の一実施例を示すその概略正面断面図、第３図は第
２図に示す装置の概略平面図、第４図および第５図は該
装置の作用説明図、第６図は該装置におけるバルブリフ
ト特性を示す図である。１１・・・バルブ駆動カム、１２・・・バルブ、１２ａ
・・・バルブステムエンド、１５・・・ロッカアーム、
１５ａ・・・背面、１９・・・レバー、１９ａ・・・レ
バーの下端面、２０・・・アーム、２３・・・ピン（レ
バーの支点）、２５，２６．２７・・・支持部材、２９
・・・第１制御カム、３０・・・第２制御カム。FIG. 1 is a schematic front sectional view showing a conventional intake/exhaust valve drive device, FIG. 2 is a schematic front sectional view showing an embodiment of the intake/exhaust valve drive device for an internal combustion engine according to this invention, and FIG. 2 is a schematic plan view of the device shown in FIG. 2, FIGS. 4 and 5 are explanatory views of the operation of the device, and FIG. 6 is a diagram showing the valve lift characteristics of the device. 11... Valve drive cam, 12... Valve, 12a
...Valve stem end, 15...Rocker arm,
15a... Back, 19... Lever, 19a... Lower end surface of lever, 20... Arm, 23... Pin (fulcrum of lever), 25, 26.27... Support member, 29
...first control cam, 30...second control cam.

Claims

[Scope of utility model registration request]

A valve drive cam that rotates in synchronization with engine rotation, and a rocker arm that is bent into a dogleg shape and has a convex curved surface on its back surface, and has one end in contact with the cam and the other end in contact with the stem end of the valve. a support member that urges one end of the rocker arm to come into contact with the cam; An intake/exhaust system for an internal combustion engine, comprising: a lever that moves its swinging fulcrum along the back surface; and an arm that swingably supports the lever at its stem end side end within the plane in which the rocker arm swings. In the valve drive device, a first control cam contacts the lever and swings the lever, and a swing support α of the lever comes into contact with the arm and when the first control cam swings so as to push down the lever. An intake/exhaust valve drive device for an internal combustion engine, characterized in that the second control cam moves the cam upward.