GB1480410A - Brake booster and master cylinder assembly - Google Patents
Brake booster and master cylinder assemblyInfo
- Publication number
- GB1480410A GB1480410A GB5528674A GB5528674A GB1480410A GB 1480410 A GB1480410 A GB 1480410A GB 5528674 A GB5528674 A GB 5528674A GB 5528674 A GB5528674 A GB 5528674A GB 1480410 A GB1480410 A GB 1480410A
- Authority
- GB
- United Kingdom
- Prior art keywords
- booster
- section
- chamber
- valve
- master cylinder
- 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.)
- Expired
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
- B60T13/573—Vacuum systems indirect, i.e. vacuum booster units characterised by reaction devices
- B60T13/577—Vacuum systems indirect, i.e. vacuum booster units characterised by reaction devices using levers
-
- 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
- B60T13/242—The control valve is provided as one unit with the servomotor cylinder
- B60T13/244—Mechanical command of the control valve, hydraulic transmission to the brakes
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
1480410 Brake booster and master cylinder assembly GENERAL MOTORS CORP 20 Dec 1974 [11 Feb 1974] 55286/74 Heading F2F A brake booster and master cylinder assembly 16 incorporates both a differential air pressure operated booster section 44 and an hydraulic fluid pressure operated booster section 46 for operation of a master cylinder section 48; a manually operable push rod 58 controls sequential power operation of the booster sections 44, 46 and also provides for manual operation of the master cylinder section 48. In the embodiment of Fig. 3 the booster section 44 is a vacuum suspended booster incorporating the push rod 58 which is operable by a brake pedal assembly 54 to operate valves 90, 92, 100 to control the pressure in a chamber 72 on one side of a movable power wall 68. When the push rod 58 is actuated valve 92 engages valve 100 to shut off chamber 72 from a chamber 70 on the other side of wall 68 which chamber 70 is permanently connected to vacuum: further movement disengages valve 90 from valve 92 to admit atmospheric air to chamber 72 creating a pressure differential across power wall 68 to move it leftwardly. Feel is provided to the operator lever reaction mechanism including a lever reaction plate 104 and reaction levers 106. The output mechanism of the booster section 44 comprises a sleeve 118 and a plunger 128 slidably received in sleeve 118, and the sleeve 118 and plunger 128 extend into hydraulic booster section 46. The hydraulic booster section 46 includes a power piston 154 reciprocable in a bore 148 and provided with a valve element 158 co-operable with a valve element 160 on the end of plunger 128 to provide a valve of the open centre type for the hydraulic booster section 46. An input port 36 of the booster section 46 connects via a conduit 32, a power steering gear 24 and a conduit 26 with a pump 22. The port 36 connects with a power chamber 166 via a passage 174 and a passage 176 mounting a pressure relief valve 178 connects passage 174 and an exhaust chamber 164. A port 38 connects with the exhaust chamber 164 and the port 38 is connected via a conduit 40 with a reservoir section 42 of pump 22. When the vacuum booster section 44 is power operated, sleeve 118 and plunger 128 are moved leftwardly together, and in this circumstance the valve elements 158, 160 do not change their relationship and hydraulic fluid continues to be circulated through the hydraulic booster section 46. However should the output of booster section 44 not be sufficient to meet the demand force then the valve element 90 will engage plunger 128 to move it leftwardly relative to sleeve 118; valve element 160 moves towards valve element 158 to cause a pressure build-up in chamber 166 which pressure acts on the piston 154. The piston 154 acts on a primary piston 194 of the master cylinder section 48 which also includes a secondary piston 196, the pistons 194, 196 controlling respective brake conduits 52, 50. In the modification of Fig. 4, the master cylinder reservoir 214 acts as a reservoir for the brake circuits and also for the power steering gear and power steering pump. The primary piston 194 is integral with or an extension of power piston 154 and the pistons are mounted in a common housing. In this arrangement conduit 40 is connected to reservoir 214 through a port 278 in the reservoir wall rather than with port 38. Different reaction ratios may be utilized in the two booster sections.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US44123974A | 1974-02-11 | 1974-02-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1480410A true GB1480410A (en) | 1977-07-20 |
Family
ID=23752083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5528674A Expired GB1480410A (en) | 1974-02-11 | 1974-12-20 | Brake booster and master cylinder assembly |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA1030580A (en) |
GB (1) | GB1480410A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2186931A (en) * | 1986-02-19 | 1987-08-26 | Teves Gmbh Alfred | Wheel-slip-controlled brake system |
GB2389633A (en) * | 2002-03-28 | 2003-12-17 | Honda Motor Co Ltd | Brake system having a vacuum booster and pressure-intensification means |
-
1974
- 1974-11-04 CA CA212,924A patent/CA1030580A/en not_active Expired
- 1974-12-20 GB GB5528674A patent/GB1480410A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2186931A (en) * | 1986-02-19 | 1987-08-26 | Teves Gmbh Alfred | Wheel-slip-controlled brake system |
GB2389633A (en) * | 2002-03-28 | 2003-12-17 | Honda Motor Co Ltd | Brake system having a vacuum booster and pressure-intensification means |
GB2389633B (en) * | 2002-03-28 | 2006-01-11 | Honda Giken Kogyo Kabushiki Kaisha | Brake system for vehicle |
Also Published As
Publication number | Publication date |
---|---|
AU7682374A (en) | 1976-06-24 |
CA1030580A (en) | 1978-05-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB615803A (en) | Improvements in or relating to fluid pressure power systems for operating brakes andother devices | |
GB1482877A (en) | Accumulator arrangement for a booster brake mechanism | |
US2383682A (en) | Control valve | |
US3935709A (en) | Dual power brake booster | |
GB1369742A (en) | Power boost mechanism | |
GB1402837A (en) | Hydraulic power boost mechanism | |
ES8406327A1 (en) | Brake actuation assembly. | |
US3106874A (en) | Control valve actuating structure | |
US3222868A (en) | Brake operating mechanism | |
JPS5851504B2 (en) | hydraulic booster | |
US2644305A (en) | Booster unit for hydraulic pressure systems | |
US3633462A (en) | Bypass orifice for hydraulic boost device | |
US3914941A (en) | Metering valve for proportioning an input force between concentric pistons | |
US2662376A (en) | Booster unit for hydraulic pressure systems | |
US3877227A (en) | Supported line pressure power brake assembly | |
GB1480410A (en) | Brake booster and master cylinder assembly | |
US2797665A (en) | Servo-assisted liquid pressure braking systems for vehicles | |
GB1464214A (en) | Hydraulic brake booster | |
US3802195A (en) | Concentric brake booster with failsafe power supply | |
US3677138A (en) | Mechanism for hydraulic brake booster | |
US3625113A (en) | Hydraulic brake booster | |
US2997850A (en) | Power operated hydraulic actuator | |
US2470748A (en) | Booster unit for hydraulic pressure systems | |
US4199947A (en) | Dual power brake booster system | |
US3368350A (en) | Fluid pressure proportioning means |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |