JPS57198158A - Booster - Google Patents

Booster

Info

Publication number
JPS57198158A
JPS57198158A JP56084135A JP8413581A JPS57198158A JP S57198158 A JPS57198158 A JP S57198158A JP 56084135 A JP56084135 A JP 56084135A JP 8413581 A JP8413581 A JP 8413581A JP S57198158 A JPS57198158 A JP S57198158A
Authority
JP
Japan
Prior art keywords
booster
valve seat
valve
plunger
stopper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56084135A
Other languages
Japanese (ja)
Inventor
Yasuo Kita
Yukinori Nishiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP56084135A priority Critical patent/JPS57198158A/en
Publication of JPS57198158A publication Critical patent/JPS57198158A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves

Abstract

PURPOSE:To improve the response when a booster piston is operated by allowing the stopper of a plunger to be lock with a fixed stopper on the shell and bringing a control valve in pressurized contact with the appropriate valve seat when the booster is not operated, in the booster for increasing the pedal stepping-in force of a car. CONSTITUTION:When pedal stopping-in is released and an input shaft 31 is returned, the second valve seat 37 is closed at first, and a control valve 39 is departed from the first valve seat 36, being pushed by the plunger 33 which returns to the right. The front and back pressure chambers 23 and 24 communicate with each other in this state, and the internal pressure in each pressure chamber accords with, then a booster piston 27 is pushed back in the direction opposite to the direction during operation by the recovery force of a spring 30 which is compressed during operation. A movable stopper 44 is lock with a fixed stopper 45 at this time, and only a valve body 26 moves rightward further after the plunger 33 stops, and the first valve seat 36 is abutted to the control valve 39. The advancing force of the piston due to the differential pressure between pressure chambers 23 and 24 and the recovery force of the spring 30 are balanced when the first and the second valve seats 36 and 37 are closed, then the booster piston 29 which follows the input shaft 31 stops.
JP56084135A 1981-05-28 1981-05-28 Booster Pending JPS57198158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56084135A JPS57198158A (en) 1981-05-28 1981-05-28 Booster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56084135A JPS57198158A (en) 1981-05-28 1981-05-28 Booster

Publications (1)

Publication Number Publication Date
JPS57198158A true JPS57198158A (en) 1982-12-04

Family

ID=13822047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56084135A Pending JPS57198158A (en) 1981-05-28 1981-05-28 Booster

Country Status (1)

Country Link
JP (1) JPS57198158A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193862U (en) * 1984-06-04 1985-12-24 株式会社ナブコ Sealing device for pneumatic booster
DE3424410A1 (en) * 1984-07-03 1986-01-09 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt VACUUM BRAKE POWER AMPLIFIER
JPS6364567U (en) * 1986-10-20 1988-04-28
JPS6364566U (en) * 1986-10-20 1988-04-28
US4846047A (en) * 1987-02-12 1989-07-11 Jidosha Kiki Co., Ltd. Brake booster with seal housing and key member
US4936195A (en) * 1987-10-30 1990-06-26 Jidosha Kiki Co., Ltd. Vacuum brake booster shell extension with radially inwardly projecting annular portion for valve key contact
DE3913536A1 (en) * 1989-04-25 1990-10-31 Teves Gmbh Alfred BRAKE POWER AMPLIFIER, ESPECIALLY FOR MOTOR VEHICLES
DE4440657A1 (en) * 1994-11-14 1996-05-15 Lucas Ind Plc Operating mechanism for motor vehicle brake system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193862U (en) * 1984-06-04 1985-12-24 株式会社ナブコ Sealing device for pneumatic booster
JPH0345893Y2 (en) * 1984-06-04 1991-09-27
DE3424410A1 (en) * 1984-07-03 1986-01-09 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt VACUUM BRAKE POWER AMPLIFIER
JPS6364567U (en) * 1986-10-20 1988-04-28
JPS6364566U (en) * 1986-10-20 1988-04-28
JPH0411898Y2 (en) * 1986-10-20 1992-03-24
JPH0412847Y2 (en) * 1986-10-20 1992-03-26
US4846047A (en) * 1987-02-12 1989-07-11 Jidosha Kiki Co., Ltd. Brake booster with seal housing and key member
US4936195A (en) * 1987-10-30 1990-06-26 Jidosha Kiki Co., Ltd. Vacuum brake booster shell extension with radially inwardly projecting annular portion for valve key contact
JPH0412851Y2 (en) * 1987-10-30 1992-03-26
DE3913536A1 (en) * 1989-04-25 1990-10-31 Teves Gmbh Alfred BRAKE POWER AMPLIFIER, ESPECIALLY FOR MOTOR VEHICLES
DE4440657A1 (en) * 1994-11-14 1996-05-15 Lucas Ind Plc Operating mechanism for motor vehicle brake system

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