GB1435677A - Antiskid braking method for a vehicle - Google Patents

Antiskid braking method for a vehicle

Info

Publication number
GB1435677A
GB1435677A GB2498074A GB2498074A GB1435677A GB 1435677 A GB1435677 A GB 1435677A GB 2498074 A GB2498074 A GB 2498074A GB 2498074 A GB2498074 A GB 2498074A GB 1435677 A GB1435677 A GB 1435677A
Authority
GB
United Kingdom
Prior art keywords
orifice
valve
actuators
wheel
pressure
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
Application number
GB2498074A
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.)
DBA SA
Original Assignee
DBA SA
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 DBA SA filed Critical DBA SA
Publication of GB1435677A publication Critical patent/GB1435677A/en
Expired 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
    • 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
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
    • B60T8/17613—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure based on analogue circuits or digital circuits comprised of discrete electronic elements
    • 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
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/42—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275—Pump-back systems
    • B60T8/4283—Pump-back systems having a pressure sensitive inlet valve
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/50—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having means for controlling the rate at which pressure is reapplied to or released from the brake
    • B60T8/5018—Pressure reapplication using restrictions
    • B60T8/5025—Pressure reapplication using restrictions in hydraulic brake systems
    • B60T8/5031—Pressure reapplication using restrictions in hydraulic brake systems open systems
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/50—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having means for controlling the rate at which pressure is reapplied to or released from the brake
    • B60T8/5087—Pressure release using restrictions
    • B60T8/5093—Pressure release using restrictions in hydraulic brake systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)

Abstract

1435677 Antiskid braking systems DBA SA 5 June 1974 [29 June 1973] 24980/74 Heading F2F In an antiskid braking method the angular speed of at least one wheel is monitored by a sensor 60, the information obtained is fed to an electronic control unit 62 to generate an output signal resulting from a pre-established condition representing a risk of wheel lock and a valve assembly 24 is operated by means of the signal the assembly comprising a valve controlling flow between pressure source and a set of actuators and means for reducing braking pressure, the set of actuators being mounted on a single axle and the supply thereto being cut upon receipt of said signal until the brakes are released and the pressure in the actuators is reduced in successive steps, each change of step resulting from the detection of a subsequent risk of skidding of the monitored wheel. The speed of pressure reduction in the actuators as varied as a function of the pressure prevailing and as a function of the instantaneous deceleration of a monitored wheel. A master cylinder 10 has one outlet connected to the front brakes and the other to the rear brakes via valve assembly 24 which includes an inlet orifice 28 an outlet orifice 30 and a discharge orifice 32 connected to the reservoir 34 of the master cylinder, the orifice 28 being connected to orifice 30 via an isolation valve having its ball closure member 36 normally biased off its seat 37 by a spring 38. Grooves 39 permit unretarded flow around the ball. Orifice 30 is connected to orifice 32 by way of a relief solenoid valve 40 of which the closure member 42 is normally biased on to its seat 41 by a spring 44, seats 37 and 44 being in alignment. A constriction 50 situated between valve outlet 48 and orifice 32 is arranged in parallel with a by-pass duct 52 controlled by a valve 54 held in its closed position by a piston 56 exposed to the pressure prevailing in the rear brake actuators 14 and counteracting a spring 58. Signals from sensor 60 are fed to control' unit 62 which controls energization of the valve 40. If the vehicle has a plurality of speed sensors the signal selected is that of the slowest wheel.
GB2498074A 1973-06-29 1974-06-05 Antiskid braking method for a vehicle Expired GB1435677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7323973A FR2235027B1 (en) 1973-06-29 1973-06-29

Publications (1)

Publication Number Publication Date
GB1435677A true GB1435677A (en) 1976-05-12

Family

ID=9121808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2498074A Expired GB1435677A (en) 1973-06-29 1974-06-05 Antiskid braking method for a vehicle

Country Status (7)

Country Link
JP (1) JPS5321473B2 (en)
DE (1) DE2431218C2 (en)
ES (1) ES427786A1 (en)
FR (1) FR2235027B1 (en)
GB (1) GB1435677A (en)
IT (1) IT1027530B (en)
SE (1) SE405954B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005092A1 (en) * 1994-08-17 1996-02-22 Daewoo Electronics Co., Ltd. Valve utilizing shape memory alloys and an anti-lock brake system with the valve

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5233866A (en) * 1975-09-10 1977-03-15 Nippon Steel Corp Runnout table for continuous roll mill
JPS5290781A (en) * 1976-01-23 1977-07-30 Sharp Corp Pressure control valve for vehicle lock protection device
US4123118A (en) * 1977-01-05 1978-10-31 Sharp Kabushiki Kaisha Antilock brake control system for a motorcycle front wheel
FR2402556A1 (en) * 1977-09-09 1979-04-06 Dba ANTI-SKID BRAKING SYSTEM COMPRISING A FLUID RE-SUPPLY DEVICE AND RE-SUPPLY DEVICE FOR SUCH A SYSTEM
JPS56148956U (en) * 1981-04-01 1981-11-09
US4675212A (en) * 1981-09-21 1987-06-23 Mannington Mills, Inc. Process for manufacturing decorative surface coverings
IT1208331B (en) * 1984-06-15 1989-06-12 Fiat Auto Spa ANTI-SKID APPARATUS FOR VEHICLES

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE698858C (en) * 1939-10-07 1940-11-19 Knorr Bremse Akt Ges Device for releasing locked axles
US3503653A (en) * 1967-03-13 1970-03-31 Eaton Yale & Towne Velocity sensing anti-skid braking system
DE2050690B2 (en) * 1970-10-15 1977-04-07 Graubremse Gmbh, 6900 Heidelberg Anti blocking brake control for heavy vehicle - with brake pressure modulation to smooth out cyclic braking
BE787296A (en) * 1971-08-09 1973-02-07 Philips Nv BRAKING DEVICE FOR VEHICLES, WITH ANTI-LOCK BRAKE CONTROL MEANS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005092A1 (en) * 1994-08-17 1996-02-22 Daewoo Electronics Co., Ltd. Valve utilizing shape memory alloys and an anti-lock brake system with the valve

Also Published As

Publication number Publication date
SE7408527L (en) 1974-12-30
FR2235027A1 (en) 1975-01-24
JPS5036876A (en) 1975-04-07
SE405954B (en) 1979-01-15
FR2235027B1 (en) 1976-05-07
DE2431218A1 (en) 1975-01-16
JPS5321473B2 (en) 1978-07-03
IT1027530B (en) 1978-12-20
ES427786A1 (en) 1976-08-01
DE2431218C2 (en) 1986-12-04

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940604