JPS59192609U

JPS59192609U - Internal combustion engine intake and exhaust valve drive device

Info

Publication number: JPS59192609U
Application number: JP8830183U
Authority: JP
Inventors: 誠之助原; 三井所　和幸
Original assignee: 日産自動車株式会社
Priority date: 1983-06-09
Filing date: 1983-06-09
Publication date: 1984-12-21

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の断面図、第２図は本
出願人によって既に提案されている吸排気弁駆動装置の
断面図、第３図はその油圧系の油圧回路図、第４図はバ
ルブリフト特性図、第５図はこの考案の吸排気弁駆動装
置の断面図、第６図は揺動型油圧アクチュエータの平面
図、第７図は　　　。 −揺動型油圧アクチュエータの油圧制御系統図、第８図
は他の揺動型油圧アクチュエータの平面図、第９図はレ
バー先端構造の他の実施例を示す断面図、第１０図は往
復動型油圧アクチュエータの断面図である。１１・・・・・・バルブ駆動カム、１２・・・・・・吸
排気弁、１４・・・・・・ブラケット、１７・・・・・
・ロッカアーム、２０・・・・・・レバー、２３・・・
・・・コイルスプリング、２５・・・・・・油圧アクチ
２ユエータ、２６・・・・・・オイルギヤラリ、２７・
・・・・・シリンダバレル、２８・・・・・・外筒部、
２９・・・・・・油溜室、３０・・・・・・内筒部、３
１・・・・・・−コイルスプリング、３２・・・・・・
油圧室、３３・・・・・・逆　−止弁、５１．８１・・
・・・・制御カム。FIG. 1 is a sectional view of a conventional intake/exhaust valve drive device, FIG. 2 is a sectional view of an intake/exhaust valve drive device already proposed by the applicant, FIG. 3 is a hydraulic circuit diagram of its hydraulic system, and FIG. Fig. 4 is a valve lift characteristic diagram, Fig. 5 is a sectional view of the intake/exhaust valve drive device of this invention, Fig. 6 is a plan view of the swing type hydraulic actuator, and Fig. 7 is. - Hydraulic control system diagram of the swinging type hydraulic actuator, Fig. 8 is a plan view of another swinging type hydraulic actuator, Fig. 9 is a sectional view showing another embodiment of the lever tip structure, and Fig. 10 is a reciprocating movement. FIG. 3 is a cross-sectional view of a type hydraulic actuator. 11... Valve drive cam, 12... Intake and exhaust valve, 14... Bracket, 17...
・Rocker arm, 20... Lever, 23...
... Coil spring, 25 ... Hydraulic actuator 2, 26 ... Oil gear rally, 27.
...Cylinder barrel, 28...Outer cylinder part,
29... Oil reservoir chamber, 30... Inner cylinder part, 3
1...-Coil spring, 32...
Hydraulic chamber, 33...Return check valve, 51.81...
...Control cam.

Claims

[Scope of utility model registration request]

a valve drive cam that rotates in synchronization with engine rotation; a rocker arm that has one end in contact with the valve drive cam and the other end that is linked to the valve stem; A lever with a rocker arm support surface that makes contact with the fulcrum, a bracket that supports one end of the lever on the valve side, and one end of the lever on the cam side that is extended by hydraulic pressure supplied according to engine operating conditions. and a hydraulic actuator for controlling the inclination of the lever, the hydraulic actuator comprising a bottomed cylindrical outer cylinder part slidably inserted into the cylinder barrel of the bracket, and the outer cylinder part. an inner cylindrical part that is slidably disposed within the part and has an oil reservoir chamber inside that communicates with the oil gear; a hydraulic chamber defined between the inner cylindrical part and the outer cylindrical part; In an intake/exhaust valve drive device for an internal combustion engine, which is comprised of a coil spring compressed into a coil spring and a check valve interposed between the hydraulic chamber and the oil reservoir chamber, the valve drive device of the lever An intake/exhaust valve drive device for an internal combustion engine, characterized in that a cam side end is supported from the side opposite to the side where the hydraulic actuator is located by a control cam that rotates according to engine operating conditions.