JPS5975504U

JPS5975504U - internal combustion engine hydraulic lifter

Info

Publication number: JPS5975504U
Application number: JP17102082U
Authority: JP
Inventors: 利夫今村
Original assignee: トヨタ自動車株式会社
Priority date: 1982-11-13
Filing date: 1982-11-13
Publication date: 1984-05-22
Also published as: JPS6347606Y2

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 the drawing]

第１図は従来の二段型構造の油圧リフタをカム側に組み
込んだ動弁機構の縦断面図、第２図は従来の二段型構造
の油圧リフタをバルブ側に組み込んだ動弁機構の縦断面
図、第３図は本考案の一実施例に係る内燃機関の油圧リ
フタをバルブ側に組み込んだ動弁機構の縦断面図、第４
図は本考案の一実施例に係る油圧リフタをカム側に組み
込んだ動弁機構の縦断面図、である。１０・・・・・・バルブ、１１・・・・・・シリンダヘ
ッド、１２・・・・・・カム、１３・・・・・・カムシ
ャフト、１４・・・・・・バルブスプリング、１５・・
・・・・ロッカシャフト、１６・・・・・・ロッカアー
ム、１７・・・・・・油圧リフタ、１８・・・・・・凹
部、１９・・・・・・プランジャ、２０・・・・・・高
圧室、２１・・・・・・リターンスプリング、２４・・
・・・・ストッパとしての段部、２５・・・・・・オイ
ル通路、２９・・・・・・開口、３０・・・・・・逆止
弁、３１・・・・・・チェックボール。Figure 1 is a vertical cross-sectional view of a valve mechanism that incorporates a conventional two-stage hydraulic lifter on the cam side, and Figure 2 shows a valve mechanism that incorporates a conventional two-stage hydraulic lifter on the valve side. FIG. 3 is a longitudinal sectional view of a valve mechanism incorporating a hydraulic lifter for an internal combustion engine on the valve side according to an embodiment of the present invention;
The figure is a longitudinal cross-sectional view of a valve mechanism incorporating a hydraulic lifter on the cam side according to an embodiment of the present invention. 10...Valve, 11...Cylinder head, 12...Cam, 13...Camshaft, 14...Valve spring, 15...・
...Rocker shaft, 16...Rocker arm, 17...Hydraulic lifter, 18...Recess, 19...Plunger, 20...・High pressure chamber, 21...Return spring, 24...
...Stepped portion as a stopper, 25 ... Oil passage, 29 ... Opening, 30 ... Check valve, 31 ... Check ball.

Claims

[Scope of utility model registration request]

A recess is formed in the rocker arm, a plunger that abuts either the valve or the cam is slidably inserted into the recess, and the inner surface of the plunger and the inner surface of the rocker arm form a high pressure chamber in which oil is sealed. An oil passage connected to the oil passage in the rocker shaft is formed in the high pressure chamber from the rocker shaft side toward the high pressure chamber side, and a check valve is provided in the oil passage to prevent oil from flowing back from inside the high pressure chamber to the rocker shaft side. The opening of the oil passage to the high pressure chamber is provided at a position out of the sliding range of the plunger, and the inner surface of the recess on the outlet side of the recess is provided with an opening in a direction opposite to the opening side of the plunger. A hydraulic lifter for an internal combustion engine characterized by having a sliding stopper.