GB1061352A – Brake pressure proportioning device
– Google Patents
GB1061352A – Brake pressure proportioning device
– Google Patents
Brake pressure proportioning device
Info
Publication number
GB1061352A
GB1061352A
GB4111/65A
GB411165A
GB1061352A
GB 1061352 A
GB1061352 A
GB 1061352A
GB 4111/65 A
GB4111/65 A
GB 4111/65A
GB 411165 A
GB411165 A
GB 411165A
GB 1061352 A
GB1061352 A
GB 1061352A
Authority
GB
United Kingdom
Prior art keywords
piston
pressure
brake
brakes
fluid
Prior art date
1964-01-30
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
Application number
GB4111/65A
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.)
Kelsey Hayes Co
Original Assignee
Kelsey Hayes Co
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.)
1964-01-30
Filing date
1965-01-29
Publication date
1967-03-08
1965-01-29
Application filed by Kelsey Hayes Co
filed
Critical
Kelsey Hayes Co
1967-03-08
Publication of GB1061352A
publication
Critical
patent/GB1061352A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
B60T11/16—Master control, e.g. master cylinders
B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another
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
B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
Abstract
1,061,352. Hydraulic brakes. KELSEYHAYES CO. Jan. 29, 1965 [Jan. 30, 1964], No. 4111/65. Heading F2F. A brake proportioning device for a vehicle hydraulic brake system comprises a first stepped piston 301 working in a first stepped bore 225, 223 having a connection 207 to the rear brakes, and a second hollow piston, whose bore slidably receives a piston valve member 252, working in a second bore 227 having a connection 217 for the front brakes and a connection leading to the right-hand end of the stepped piston, the arrangement being such that, after initial brake application, the pressure applying movement of the first piston is opposed by fluid displaced by movement of the second piston thereby modulating the pressure delivered to the rear brakes. On initial brake application, fluid from a master cylinder enters inlet connection 203, passes through port 302, past a ball valve 319, which is spring-biased to the left by plunger 321 and held unseated by projection 327 on piston valve 252 which is itself urged into abutment with said stepped piston by a strong spring 255, through radial port 329 to the rear brake connection 207. Simultaneously, fluid is supplied from inlet 203, between the piston valve and said second piston, through port 261 to firstly the front brake connection 217 and secondly to the right-hand end of the first stepped piston, the fluid pressure being the same throughout the system at this stage. At a predetermined pressure, differential piston valve 252 moves to the left against the bias of spring 255 to seat against the second piston and simultaneously to allow valve 319 to seat. Thereafter fluid pressure is only transmitted to each respective brake set by combined movement of piston 233 and valve 252 to the left and by movement of piston 301 to the right, the former acting to amplify the front brake delivery pressure relative to the master cylinder supply pressure and the latter acting to reduce the rear brake delivery pressure relative to the master cylinder pressure. In addition the front brake delivery pressure acting on the rear of piston 301 resists movement of said piston and further modifies the rear brake delivery pressure. In the embodiment of Fig. 1 (not shown), a ball 75 rides up on inclined seat in a first stepped piston 43 at a predetermined vehicle deceleration to cut off a by-pass 65 between a fluid inlet 3 and rear brake connection 21. Thereafter, the stepped piston moves to the left and subsequently reduces the ratio of rear brake delivery pressure to master cylinder supply pressure. Port 108 communicates the rear brake pressure to chamber 33 so that as soon as ball 75 seats and the supply pressure is increased, a second stepped piston 91 moves to the left allowing ball 115 to cut-off a by-pass 103 through the piston to the front brake connection 9, delivery to the front brakes thereafter being amplified by the differential areas of piston 91. The communicating port 108 allows the delivery pressure to one set of brakes to act in opposition to modify the delivery pressure to the other set of brakes. In a final embodiment, Figs. 4-6 (not shown), the pressure proportioning device is incorporated in a tandem master-cylinder construction. In this arrangement, initial movement of directly-actuated master cylinder piston 417 supplies fluid through ports 443, 447, past piston valve 453 to rear brake connection 452 prior to sufficient compression of coupling spring 433 to move a stepped piston 427 against spring 434 to pressurize the front brakes. This arrangement is particularly suitable for a system having disc brakes on the front wheels and drum brakes on the rear. On movement of piston 427 fluid is delivered through a port 441 around an annular groove 437 in a piston 457 to the front brakes, a ball-controlled by-pass 479, 488 equalizing pressure on either side of piston 427 to ensure a 1/1 ratio of front-wheel brake delivery pressure to master cylinder pressure. Fluid is also bypassed through port 472 to the left-hand side of piston valve 447. At a predetermined pressure, ball 479 seats and the ratio of the transmitted pressure to the front brakes is increased by the differential areas and the pressures acting thereon. At a greater predetermined pressure the piston valve seats against a piston 445 to close off the rear brake connection 452 from port 443. Thereafter, the pressure transmitted to the rear brakes relative to the master cylinder pressure is reduced according to differential areas of piston 453 and the opposing front brake pressure acting on the left-hand side of piston valve 447.
GB4111/65A
1964-01-30
1965-01-29
Brake pressure proportioning device
Expired
GB1061352A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US341308A
US3252740A
(en)
1964-01-30
1964-01-30
Brake pressure proportioning device
Publications (1)
Publication Number
Publication Date
GB1061352A
true
GB1061352A
(en)
1967-03-08
Family
ID=23337026
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4111/65A
Expired
GB1061352A
(en)
1964-01-30
1965-01-29
Brake pressure proportioning device
Country Status (3)
Country
Link
US
(1)
US3252740A
(en)
DE
(1)
DE1530916B1
(en)
GB
(1)
GB1061352A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2000236A
(en)
*
1977-06-17
1979-01-04
Automotive Prod Co Ltd
Hydraulic master cylinder
Families Citing this family (24)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB1129081A
(en)
*
1965-05-20
1968-10-02
Girling Ltd
Improvements relating to vehicle brakes
US3375852A
(en)
*
1965-06-21
1968-04-02
Wagner Electric Corp
Control valve
US3354638A
(en)
*
1965-09-28
1967-11-28
Wagner Electric Corp
Control valve
US3358445A
(en)
*
1965-09-28
1967-12-19
Tung Sol Electric Inc
Control valve
US3398757A
(en)
*
1965-09-28
1968-08-27
Wagner Electric Corp
Inertia responsive antiskid control valve
US3489465A
(en)
*
1966-08-22
1970-01-13
Wagner Electric Corp
Control valve
US3871713A
(en)
*
1971-05-17
1975-03-18
Paul M Lister
Braking system for vehicles having speed controlled proportional braking for front and rear wheels
IT994358B
(en)
*
1972-10-05
1975-10-20
Daimler Benz Ag
LOAD-DEPENDENT DOUBLE CIRCUIT BRAKE FOR VEHICLES IN PARTICULAR OMNIBUS OR SIMILAR LOAD VEHICLES
US3994533A
(en)
*
1974-08-09
1976-11-30
Tokico Ltd.
Inertia-type hydraulic brake pressure control valve
US3922020A
(en)
*
1975-01-31
1975-11-25
Nissan Motor
Fluid pressure controlling device for brake system of wheeled vehicle
JPS51120491U
(en)
*
1975-03-28
1976-09-30
JPS528269A
(en)
*
1975-07-10
1977-01-21
Aisin Seiki Co Ltd
Deceleration controlling valve
JPS52132276A
(en)
*
1976-04-30
1977-11-05
Nissan Motor Co Ltd
Deceleration perception type brake oil hydraulic control valve
JPS5828139B2
(en)
*
1976-07-12
1983-06-14
トヨタ自動車株式会社
Deceleration sensing type brake hydraulic control device
JPS5337279A
(en)
*
1976-09-18
1978-04-06
Toyota Motor Corp
Safety device of vehicular
JPS5362067A
(en)
*
1976-11-16
1978-06-03
Toyota Motor Corp
Deceleration detection type braking hydraulic control system
JPS5370276A
(en)
*
1976-12-02
1978-06-22
Toyota Motor Corp
Brake oil controller for vehicle
JPS5753724Y2
(en)
*
1977-04-15
1982-11-20
DE3138958A1
(en)
*
1981-09-30
1983-04-14
Alfred Teves Gmbh, 6000 Frankfurt
Brake pressure control unit for a motor vehicle hydraulic or pneumatic brake system
US4934760A
(en)
*
1983-12-19
1990-06-19
Caterpillar Inc.
Friction brake mechanism with automatic sequencing
DE8418527U1
(en)
*
1984-06-19
1984-09-20
Lucas Industries P.L.C., Birmingham, West Midlands
PRESSURE REGULATOR FOR HYDRAULIC VEHICLE BRAKING SYSTEMS
US4736989A
(en)
*
1986-10-30
1988-04-12
Allied Corporation
Dual deceleration and pressure-sensitive proportioning valve
US4969697A
(en)
*
1989-06-21
1990-11-13
Allied-Signal Inc.
Pressure differential release valve
US6993907B2
(en)
*
2004-03-10
2006-02-07
Janel Hydro Co.
Automotive hydraulic braking system and a hydraulic brake intensifying apparatus for use therein
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2242297A
(en)
*
1939-09-02
1941-05-20
Wagner Electric Corp
Ratio changing means for fluidactuated brakes
DE1094127B
(en)
*
1954-10-02
1960-12-01
Teves Kg Alfred
Pressure distributor for gaseous and liquid media, especially in brake actuation systems on motor vehicles
DE1091884B
(en)
*
1954-10-06
1960-10-27
Teves Kg Alfred
Pressure regulator, in particular for hydraulic brake actuation systems in motor vehicles
US2835271A
(en)
*
1954-10-06
1958-05-20
Teves Kg Alfred
Pressure regulator
FR1247984A
(en)
*
1959-10-26
1960-12-09
Simca Automobiles Sa
Pressure multiplier-distributor for hydraulic control of motor vehicle brakes
US3097018A
(en)
*
1961-06-12
1963-07-09
Kelsey Hayes Co
Motor vehicle hydraulic brake system
1964
1964-01-30
US
US341308A
patent/US3252740A/en
not_active
Expired – Lifetime
1965
1965-01-29
GB
GB4111/65A
patent/GB1061352A/en
not_active
Expired
1965-01-29
DE
DE19651530916D
patent/DE1530916B1/en
active
Pending
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2000236A
(en)
*
1977-06-17
1979-01-04
Automotive Prod Co Ltd
Hydraulic master cylinder
GB2000236B
(en)
*
1977-06-17
1982-01-20
Automotive Prod Co Ltd
Hydraulic master cylinder
Also Published As
Publication number
Publication date
DE1530916B1
(en)
1970-05-06
US3252740A
(en)
1966-05-24
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