JPS60183208U

JPS60183208U - Direct acting hydraulic valve lifter

Info

Publication number: JPS60183208U
Application number: JP6900784U
Authority: JP
Inventors: 浪益大沢
Original assignee: 日産自動車株式会社
Priority date: 1984-05-14
Filing date: 1984-05-14
Publication date: 1985-12-05

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、従来の直動型油圧式バルブリフタのカム作動
時の状態を示す断面図、第２図は、同じくカム不作動時
の状態を示す断面図、第３図は、この考案の一実施例の
カム作動時の状態を示す断面図、笹４図は、同じくカム
不作動時の状態を示す断面図、第５図は、この考案の他
の実施例を示す断面図である。１・・・・・・バルブリフタ、２・・・・・・ボディ、
４・・・・・・プランジャ、４”ａ・・・・・・内側壁
、４ｂ・・・・・・外側壁、５・・・・・・内筒、６・
・・・・・リターンスプリング、７・・・・・・高圧室
、９・・・・・・第１のリザーバ室、１１・・・・・・
チェックボール、２１・・・・・・第２のリザーバ室、
２２，２４・・・・・・油通路。Fig. 1 is a cross-sectional view showing a conventional direct-acting hydraulic valve lifter when the cam is in operation, Fig. 2 is a cross-sectional view showing the same state when the cam is not in operation, and Fig. 3 is one example of this invention. Fig. 4 is a cross-sectional view showing the state when the cam is in operation, and Fig. 5 is a cross-sectional view showing the state when the cam is inactive. 1...Valve lifter, 2...Body,
4...Plunger, 4"a...Inner wall, 4b...Outer wall, 5...Inner cylinder, 6.
... Return spring, 7 ... High pressure chamber, 9 ... First reservoir chamber, 11 ...
Check ball, 21...Second reservoir room,
22, 24...Oil passage.

Claims

[Scope of utility model registration request]

The plunger, which slides in the axial direction inside the body, is returned to the specified position by a return spring, and oil from the outside flows into the high pressure chamber through the reservoir chamber, so the valve clearance is always maintained at zero. type hydraulic valve lifter, wherein the plunger has a double cylinder structure having a small-diameter inner wall and a large-diameter outer wall concentric with the inner wall, and a first reservoir chamber is formed inside the inner wall. A direct acting hydraulic valve lifter further comprising a second reservoir chamber formed between the inner wall and the outer wall.