JPS5827505U

JPS5827505U - Hydraulic lock adjuster

Info

Publication number: JPS5827505U
Application number: JP10549181U
Authority: JP
Inventors: 民郎中窪; 光一清水; 細川　哲寛
Original assignee: トヨタ自動車株式会社
Priority date: 1981-07-15
Filing date: 1981-07-15
Publication date: 1983-02-22

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

図面は本考案の実施例を示し、第１図は内燃機関におけ
る動弁系の主要部を表わした断面図、第２図はハイドミ
リツク・アジャスタの拡大断面図、第３図は空気協をも
つ気密体の拡大断面図、第４図は第３図の気密体が圧縮
力を受けて弾性変形した状態の断面図、第５図は空気室
の特性図、第６図、第７図は異なる形状の気密体を表わ
したそれぞれの断面図、第８図は異なる構成の空気室を
示すラッシュアジャスタの部分断面図である。１・・・シリンダヘッド、３・・・弁、４・・・バルブ
ステム、９・・・ロッカアーム、２０・・・ラッシュア
ジヤス、夕、２１・・・シリンダ、２２・・・プランジ
ャ、２３・・・貯油室、２６・・・圧力室、２８・・・
逆子弁、４１゜４１Ａ・・・空気室。The drawings show an embodiment of the present invention; Fig. 1 is a sectional view showing the main parts of the valve train in an internal combustion engine, Fig. 2 is an enlarged sectional view of the hydraulic adjuster, and Fig. 3 is an airtight valve system with air adjustment. Figure 4 is a cross-sectional view of the airtight body shown in Figure 3 in a state where it is elastically deformed under compressive force, Figure 5 is a characteristic diagram of the air chamber, Figures 6 and 7 are different shapes. FIG. 8 is a partial sectional view of a lash adjuster showing air chambers with different configurations. DESCRIPTION OF SYMBOLS 1... Cylinder head, 3... Valve, 4... Valve stem, 9... Rocker arm, 20... Lash adjuster, 21... Cylinder, 22... Plunger, 23... ...Oil storage chamber, 26...Pressure chamber, 28...
Breech valve, 41° 41A...Air chamber.

Claims

[Scope of utility model registration request]

A plunger that is reciprocably inserted into a cylinder with an opening at the top end and constantly receives a biasing force in a direction to increase the amount of protrusion from the opening at the top end of the cylinder; A pressure chamber is formed between the lower surface of the plunger and the inner surface of the lower part of the cylinder, and communicates with the oil storage chamber through a valve port. A lash adjuster is equipped with a check valve that allows oil flow from the pressure chamber to the oil storage chamber but blocks the flow from the pressure chamber to the oil storage chamber, the pressure chamber being at least partially made of an elastic body, and the elastic body being configured as the oil pressure changes in the pressure chamber. A hydraulic lash adjuster characterized by having an air chamber whose volume changes depending on the deformation of the hydraulic lash adjuster.