JPS61551U

JPS61551U - Automatic transmission hydraulic control device

Info

Publication number: JPS61551U
Application number: JP8535084U
Authority: JP
Inventors: 啓治坊田; 卓治藤原
Original assignee: マツダ株式会社
Priority date: 1984-06-08
Filing date: 1984-06-08
Publication date: 1986-01-06
Also published as: JPH0210863Y2

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]

図面は本考案の一実施例を示す油圧制御装置の回路図で
ある。１０・・・オラツチアクチュエータ、１２・・・ブレー
キ係合側圧力室、１４・・・ブレーキ解除側圧力室、１
６・・・ブレーキアクチュエータ、２０・・・セレクト
弁、３０・・・２−３シフト弁、３３・・・減圧弁、３
６・・・逆止弁、４０・・・ガバナ、４３・・・蓄圧器
、４５・・・可動ピストン、５０・・・バキュームスロ
ットル弁、７０・・・第１タイミング弁、７２・・・第
２タイミング弁、７４・・・第３タイミング弁。The drawing is a circuit diagram of a hydraulic control device showing an embodiment of the present invention. 10... Oratsuchi actuator, 12... Brake engagement side pressure chamber, 14... Brake release side pressure chamber, 1
6... Brake actuator, 20... Select valve, 30... 2-3 shift valve, 33... Pressure reducing valve, 3
6... Check valve, 40... Governor, 43... Pressure accumulator, 45... Movable piston, 50... Vacuum throttle valve, 70... First timing valve, 72... No. 2 timing valve, 74...3rd timing valve.

Claims

[Scope of utility model registration request]

(1) In a hydraulic control device for an automatic transmission for controlling hydraulic pressure supply to the friction device of a transmission gear mechanism in which a gear stage is selected by engagement and disengagement of the friction device, the friction device A pressure accumulator including a movable member having a first pressure receiving surface receiving the pressure of the oil passage and a second pressure receiving surface receiving the pressure acting on the first pressure receiving surface is provided in the oil passage. , a pressure reducing valve is provided in the oil passage on the upstream side of the pressure accumulator when viewed in the direction of oil pressure supply to the friction device;
A hydraulic control device for an automatic transmission, wherein hydraulic pressure via the pressure reducing valve is applied to the second pressure receiving surface of the movable member of the pressure accumulator.

(2) The hydraulic control device according to item (1), wherein the second pressure receiving surface has a smaller pressure receiving area than the first pressure receiving surface.

(3) The hydraulic control device according to item (1) or item (2), wherein the pressure reducing valve is a valve that increases the discharge pressure as the pressure increases in accordance with the pressure corresponding to the engine output.