JPS57198160A - Brake unit of electric automobile - Google Patents

Brake unit of electric automobile

Info

Publication number
JPS57198160A
JPS57198160A JP56083652A JP8365281A JPS57198160A JP S57198160 A JPS57198160 A JP S57198160A JP 56083652 A JP56083652 A JP 56083652A JP 8365281 A JP8365281 A JP 8365281A JP S57198160 A JPS57198160 A JP S57198160A
Authority
JP
Japan
Prior art keywords
vacuum
servo unit
degree
bypass passage
tank
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.)
Granted
Application number
JP56083652A
Other languages
Japanese (ja)
Other versions
JPS6114028B2 (en
Inventor
Akira Shimokune
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Toyo Kogyo Co 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 Mazda Motor Corp, Toyo Kogyo Co Ltd filed Critical Mazda Motor Corp
Priority to JP56083652A priority Critical patent/JPS57198160A/en
Publication of JPS57198160A publication Critical patent/JPS57198160A/en
Publication of JPS6114028B2 publication Critical patent/JPS6114028B2/ja
Granted 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
    • B60T13/241—Differential pressure systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

PURPOSE:To recover the degree of vacuum of a vacuum servo unit directly through a bypass passage in a short time when the degrees of vacuum in both a vacuum tank and the vacuum servo unit are reduced to less than the predetermined values respectively due to frequent brake operations. CONSTITUTION:When the degrees of vacuum in a vacuum tank 7 and a cacuum servo unit 1 are rapidly reduced to less than the predetermined values due to frequent brake operations, they are detected by vacuum detection sensors 16a, 16b, and a control circuit 15 switches a transfer valve 9 so as to connect a bypass passage 5 to a vacuum pump 11 and also closes a stop valve 6 so as to cut off the cacuum servo unit 1 from the vacuum tank 7. As a result, the vacuum pump 11 introduces a negative pressure into a front cell 1b of the vacuum servo unit 1 through a part of the second passage 8 and the bypass passage 5, therefore, the degree of vacuum of the vacuum servo unit 1 is recovered rapidly, and when it is recovered beyond the predetermined value, then the transfter value 9 is switched so that the vacuum pump 11 recovers the degree of vacuum of the vacuum tank 7 to the predetermined value.
JP56083652A 1981-05-30 1981-05-30 Brake unit of electric automobile Granted JPS57198160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56083652A JPS57198160A (en) 1981-05-30 1981-05-30 Brake unit of electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56083652A JPS57198160A (en) 1981-05-30 1981-05-30 Brake unit of electric automobile

Publications (2)

Publication Number Publication Date
JPS57198160A true JPS57198160A (en) 1982-12-04
JPS6114028B2 JPS6114028B2 (en) 1986-04-16

Family

ID=13808376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56083652A Granted JPS57198160A (en) 1981-05-30 1981-05-30 Brake unit of electric automobile

Country Status (1)

Country Link
JP (1) JPS57198160A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6068856U (en) * 1983-10-19 1985-05-16 いすゞ自動車株式会社 Vehicle pump control device
JPS6343212U (en) * 1986-09-05 1988-03-23
JPH01164670A (en) * 1987-12-21 1989-06-28 Nippon Piston Ring Co Ltd Pressure difference generating device for master bag in brake magnification system for diesel engine automobile
KR100457213B1 (en) * 2001-12-24 2004-11-12 현대자동차주식회사 break performance improvement system using brake booster
CN103253255A (en) * 2012-12-31 2013-08-21 湖南吉利汽车部件有限公司 Auxiliary vacuum power-assisted braking device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6068856U (en) * 1983-10-19 1985-05-16 いすゞ自動車株式会社 Vehicle pump control device
JPS6343212U (en) * 1986-09-05 1988-03-23
JPH0534017Y2 (en) * 1986-09-05 1993-08-30
JPH01164670A (en) * 1987-12-21 1989-06-28 Nippon Piston Ring Co Ltd Pressure difference generating device for master bag in brake magnification system for diesel engine automobile
KR100457213B1 (en) * 2001-12-24 2004-11-12 현대자동차주식회사 break performance improvement system using brake booster
CN103253255A (en) * 2012-12-31 2013-08-21 湖南吉利汽车部件有限公司 Auxiliary vacuum power-assisted braking device

Also Published As

Publication number Publication date
JPS6114028B2 (en) 1986-04-16

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