JPS63147356U

JPS63147356U -

Info

Publication number: JPS63147356U
Application number: JP4032187U
Authority: JP
Priority date: 1987-03-19
Filing date: 1987-03-19
Publication date: 1988-09-28

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図、第２
図は第１図の要部を拡大して示す断面図である。１……段付シリンダ、２……プライマリピスト
ン、３……セカンダリピストン、１１……連通部
、１２……フアストフイルバルブ、１３……リザ
ーバタンク、１４……電磁石、１５……スプリン
グ、１６……ストツパ。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an enlarged cross-sectional view of the main part of FIG. 1. DESCRIPTION OF SYMBOLS 1...Stepped cylinder, 2...Primary piston, 3...Secondary piston, 11...Communication section, 12...Fast fill valve, 13...Reservoir tank, 14...Electromagnet, 15...Spring, 16... ...Stotsupa.

Claims

[Scope of utility model registration request]

A stepped piston having a large diameter piston and a small diameter piston is slidably fitted into a stepped cylinder having a large diameter cylinder and a small diameter cylinder, and a large diameter side hydraulic pressure chamber is formed within the large diameter cylinder. In the passage leading from the relief port to the reservoir tank, when the hydraulic pressure generated in the large diameter side hydraulic pressure chamber is less than a set value, the small diameter side hydraulic pressure chamber is closed and the hydraulic pressure is transferred to the small diameter side hydraulic pressure chamber formed in the small diameter cylinder. The fast-fill type is equipped with a fast-fill valve that acts on the wheel brake device from here and opens when the hydraulic pressure in the large-diameter hydraulic chamber exceeds a set value, allowing the pressurized liquid in the large-diameter hydraulic chamber to flow into the reservoir tank. In the master cylinder, the fast-fill valve is connected to a position where a predetermined hydraulic pressure is generated in the large-diameter hydraulic chamber as described above, and a position where the large-diameter hydraulic chamber and the inside of the reservoir tank are communicated with each other so that fluid is generated in the large-diameter hydraulic chamber. 1. A master cylinder configured to be movable to a position where no pressure is generated, and comprising an actuator that controls movement of the fast-fill valve according to driving conditions.