JPS574450A - Brake booster - Google Patents
Brake boosterInfo
- Publication number
- JPS574450A JPS574450A JP7847080A JP7847080A JPS574450A JP S574450 A JPS574450 A JP S574450A JP 7847080 A JP7847080 A JP 7847080A JP 7847080 A JP7847080 A JP 7847080A JP S574450 A JPS574450 A JP S574450A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- booster
- negative pressure
- constant
- pressure chamber
- 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
Links
Landscapes
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
PURPOSE: To keep the fluid pressure of a booster constant even if a main pressure supply line becomes defective, by putting an auxiliary pressure feeder in operation when the fluid pressure in the booster supplied from a main pressure feeder has become lower than a set level.
CONSTITUTION: When an engine 14 is started by closing a main switch 13, negative pressure is supplied to the constant pressure chamber and varying pressure chamber of a booster 2. When a control valve is actuated by pressing a pedal 1 down, both said chambers are disconnected from each other and the atmospheric pressure is introduced into the varying pressure chamber to perform braking. When the frequency of use of the booster 2 has increased or the negative pressure in the constant pressure chamber of the booster 2 has become lower than a prescribed level due to the trouble of a negative pressure supply line from an intake manifold 6 or due to the like, a pressure detector 8 acts to drive an auxiliary pump 9 to intensify the negative pressure in the constant pressure chamber. When the negative pressure has exceeded a predetermined level, the pressure detector 8 acts to stop the pump 9. The negative pressure is thus kept constant.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7847080A JPS574450A (en) | 1980-06-11 | 1980-06-11 | Brake booster |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7847080A JPS574450A (en) | 1980-06-11 | 1980-06-11 | Brake booster |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS574450A true JPS574450A (en) | 1982-01-11 |
Family
ID=13662896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7847080A Pending JPS574450A (en) | 1980-06-11 | 1980-06-11 | Brake booster |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS574450A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4543044A (en) * | 1983-11-09 | 1985-09-24 | E. I. Du Pont De Nemours And Company | Constant-flow-rate dual-unit pump |
JPS62115963U (en) * | 1986-01-17 | 1987-07-23 | ||
US5400693A (en) * | 1992-08-26 | 1995-03-28 | Lucas Industries Public Limited Company | Brake pressure booster |
US5413438A (en) * | 1986-03-17 | 1995-05-09 | Turchan; Manuel C. | Combined hole making and threading tool |
USRE35255E (en) * | 1986-03-17 | 1996-05-28 | Turchan; Manuel C. | Combined hole making and threading tool |
KR20020050652A (en) * | 2000-12-21 | 2002-06-27 | 이계안 | Vacuum booster for brake system |
KR100391590B1 (en) * | 2000-07-28 | 2003-07-12 | 현대자동차주식회사 | A quick start preventing system for vehicle |
WO2011145191A1 (en) * | 2010-05-19 | 2011-11-24 | トヨタ自動車株式会社 | Braking control system |
CN104015715A (en) * | 2014-06-24 | 2014-09-03 | 重庆长安汽车股份有限公司 | Automobile and braking vacuum system thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49124729A (en) * | 1973-02-22 | 1974-11-29 |
-
1980
- 1980-06-11 JP JP7847080A patent/JPS574450A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49124729A (en) * | 1973-02-22 | 1974-11-29 |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4543044A (en) * | 1983-11-09 | 1985-09-24 | E. I. Du Pont De Nemours And Company | Constant-flow-rate dual-unit pump |
JPS62115963U (en) * | 1986-01-17 | 1987-07-23 | ||
JPH0421746Y2 (en) * | 1986-01-17 | 1992-05-18 | ||
US5413438A (en) * | 1986-03-17 | 1995-05-09 | Turchan; Manuel C. | Combined hole making and threading tool |
USRE35255E (en) * | 1986-03-17 | 1996-05-28 | Turchan; Manuel C. | Combined hole making and threading tool |
US5400693A (en) * | 1992-08-26 | 1995-03-28 | Lucas Industries Public Limited Company | Brake pressure booster |
KR100391590B1 (en) * | 2000-07-28 | 2003-07-12 | 현대자동차주식회사 | A quick start preventing system for vehicle |
KR20020050652A (en) * | 2000-12-21 | 2002-06-27 | 이계안 | Vacuum booster for brake system |
WO2011145191A1 (en) * | 2010-05-19 | 2011-11-24 | トヨタ自動車株式会社 | Braking control system |
JP5333665B2 (en) * | 2010-05-19 | 2013-11-06 | トヨタ自動車株式会社 | Braking control system |
US9028010B2 (en) | 2010-05-19 | 2015-05-12 | Toyota Jidosha Kabushiki Kaisha | Braking control system |
CN104015715A (en) * | 2014-06-24 | 2014-09-03 | 重庆长安汽车股份有限公司 | Automobile and braking vacuum system thereof |
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