JPS59154804U

JPS59154804U - Internal combustion engine intake and exhaust valve drive device

Info

Publication number: JPS59154804U
Application number: JP4862083U
Authority: JP
Inventors: 誠之助原; 三井所　和幸; 松本　泰郎
Original assignee: 日産自動車株式会社
Priority date: 1983-03-31
Filing date: 1983-03-31
Publication date: 1984-10-17

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) [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
出願人によって提案された吸排気弁駆動装置の断面図、
第３図は制御油圧系の一例を示す油圧回路図、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図は同じく要部の他の実施構造を示
す断面図、第７図は同じく要部のさらに他の実施構造を
示す正面図である。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
ュエータ、２６・・・・・・オイルギヤラリ、２７・・
・・・・シリンダバレル、２８・・・・・・外筒部、２
９・・！・・・油溜室、３０・・・・・・内筒部、３１
・・・・・・コイルスプリング、３２・・・・・・油圧
室、３３・・・・・・逆止弁、５４．５９・・・・・・
摩擦部材。ア・１．−FIG. 1 is a sectional view of a conventional intake/exhaust valve drive device, and FIG. 2 is a sectional view of an intake/exhaust valve drive device proposed by the applicant.
Fig. 3 is a hydraulic circuit diagram showing an example of a control hydraulic system, Fig. 4 is a valve lift characteristic diagram, Fig. 5 is a sectional view of the intake/exhaust valve drive device of this invention, and Fig. 6 is a diagram showing other important parts. FIG. 7 is a sectional view showing an implementation structure, and a front view showing still another implementation structure of the same main part. 11... Valve drive cam, 12... Intake and exhaust valve, 14... Bracket, 17...
・Rocker arm, 20... Lever, 23...
... Coil spring, 25 ... Hydraulic actuator, 26 ... Oil gear rally, 27 ...
...Cylinder barrel, 28...Outer cylinder part, 2
9...! ... Oil reservoir chamber, 30 ... Inner cylinder part, 31
......Coil spring, 32...Hydraulic chamber, 33...Check valve, 54.59...
Friction member. A.1. −

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 a bottomed cylindrical outer cylinder part that is slidably inserted into the cylinder barrel of the bracket, and a hydraulic actuator that controls the inclination of the lever. an inner cylindrical part that is slidably disposed in the interior of the cylinder and has an oil reservoir therein 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 comprises a compressed coil spring and a check valve interposed between the hydraulic chamber and the oil reservoir chamber, the repulsive force of the coil spring The intake and exhaust valve drive for an internal combustion engine is characterized in that the diameter of the valve is such that the amount of valve lift required for starting the engine can be obtained, and a friction member attached to the bracket side is brought into contact with the outer peripheral surface of the outer cylinder part. Device.