GB1537403A - Servo-assisted hydraulic master cylinder - Google Patents
Servo-assisted hydraulic master cylinderInfo
- Publication number
- GB1537403A GB1537403A GB2056976A GB2056976A GB1537403A GB 1537403 A GB1537403 A GB 1537403A GB 2056976 A GB2056976 A GB 2056976A GB 2056976 A GB2056976 A GB 2056976A GB 1537403 A GB1537403 A GB 1537403A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- port
- servo
- valve member
- 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
- B60T13/241—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)
- Transmission Of Braking Force In Braking Systems (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
1537403 Servo-assisted hydraulic master cylinders AUTOMOTIVE PRODUCTS Ltd 27 April 1977 [19 May 1976 19 March 1977] 20569/76 and 11753/77 Heading F2F A servo-assisted hydraulic master cylinder comprises a driver-controlled servo valve member 22, Fig. 1A, in a servo valve housing 21, a first piston 41, Fig. 1B, and a second piston 46, in the master cylinder 11, adapted to be moved by the servo valve member 22 and the servo valve housing 21 respectively, first and second ports 61 and 67, Fig. 1B, for connection to a tank 62 and a brake actuator (not shown) respectively, a first chamber 55 in the master cylinder connected to the ports, movement of the servo valve member 22 in a brake-applying direction shutting off communication between the first chamber 55 and first port 61 and causing the first piston 41 to reduce the volume of the first chamber 55 to create brake-applying pressure at the second port 67, a second chamber 57, Fig. 1B, in the master cylinder connected to the first port 61, movement of the second piston 46 in the brake-applying direction shutting off communication from the second chamber 57 to the first port 61 and varying the volume of the second chamber 57, a first non-return valve 64 allowing communication from the second chamber 57 to the first chamber 55, a second non-return valve 78 allowing communication from the first port 61 to the second chamber 57, and a metering valve 46, 51, having a metering valve member 46 which is responsive to pressure in each of the first and second chambers to progressively vary the pressure in the second chamber 57 over a range of pressures in the first chamber 55, displacement of hydraulic fluid from the first chamber 55 through the second port 67 beginning at a high rate with respect to brake-applying movement of the servo valve member 22 and reducing to a low rate when the metering valve 46, 51, becomes operative; the arrangement is such that while the source pressures 24 (vacuum) and 32 (atmosphere) about the movable wall 18 are maintained, driver effort on the servo valve member 22 produces a pressure in the first chamber 55 substantially proportional thereto, and in the event of failure to maintain the source pressures, the change from the high rate of displacement to the low rate occurs at a substantially unaltered pressure in the first chamber 55.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2056976A GB1537403A (en) | 1976-05-19 | 1976-05-19 | Servo-assisted hydraulic master cylinder |
AU24631/77A AU507295B2 (en) | 1976-05-19 | 1977-04-27 | Servo-assisted hydraulic master cylinder |
DE19772720663 DE2720663A1 (en) | 1976-05-19 | 1977-05-07 | AUXILIARY HYDRAULIC MASTER CYLINDER FOR A VEHICLE BRAKE SYSTEM |
US05/797,769 US4172364A (en) | 1976-05-19 | 1977-05-17 | Servo-assisted hydraulic master cylinder |
FR7715365A FR2351834A1 (en) | 1976-05-19 | 1977-05-18 | SERVO-CONTROLLED HYDRAULIC MASTER CYLINDER, ESPECIALLY FOR BRAKING CIRCUIT |
JP5751677A JPS52140773A (en) | 1976-05-19 | 1977-05-18 | Brake master cylinder |
ES458940A ES458940A1 (en) | 1976-05-19 | 1977-05-19 | Servo-assisted hydraulic master cylinder |
US06/009,084 US4220007A (en) | 1976-05-19 | 1979-02-02 | Servo-assisted hydraulic master cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2056976A GB1537403A (en) | 1976-05-19 | 1976-05-19 | Servo-assisted hydraulic master cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1537403A true GB1537403A (en) | 1978-12-29 |
Family
ID=10148081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2056976A Expired GB1537403A (en) | 1976-05-19 | 1976-05-19 | Servo-assisted hydraulic master cylinder |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1537403A (en) |
-
1976
- 1976-05-19 GB GB2056976A patent/GB1537403A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1434561A (en) | Dual range pressure dependent variable flow fluid delivery system | |
GB1513816A (en) | Throttle valves for two-line vehicle braking systems | |
ES479876A1 (en) | Modulator valve for a spinning and skidding wheel assembly | |
GB1307040A (en) | Hydraulic boost device with auxiliary fluid supply | |
GB1512996A (en) | Control mechanism for pumps | |
GB1493305A (en) | Hydraulic booster | |
GB1402837A (en) | Hydraulic power boost mechanism | |
GB1183825A (en) | Improvements in or relating to Hydraulic Systems. | |
GB1518035A (en) | Servo-assisted hydraulic braking system | |
GB1445355A (en) | Master cylinders for breaking systems | |
GB1161142A (en) | Improved Fluid Pressure Servomotor. | |
GB1387194A (en) | Hydraulic servo unit for automotive braking system | |
GB1316567A (en) | Hydraulic power brake booster motor | |
GB1502140A (en) | Multiple-circuit brake installation for vehicles | |
GB1357289A (en) | Hydraulic brake pressure control valve for a vehicle braking system | |
GB811006A (en) | Improvements in or relating to servo-assisted liquid pressure braking systems | |
GB1292098A (en) | Hydraulic system | |
GB1444881A (en) | Tandem master cylinder with in-line check valves | |
GB1456921A (en) | Sealing arrangement for a hydraulic device | |
GB1465714A (en) | Motor vehicle open centre series hydraulic circuit | |
GB1456836A (en) | Servo assemblies and systems | |
GB1253347A (en) | Antiskid control system | |
GB1303405A (en) | ||
GB1537403A (en) | Servo-assisted hydraulic master cylinder | |
GB1421703A (en) | Hydraulic pressure modulatorp |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |