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GB1347033A - Preventing the locking of vehicle wheels during braking - Google Patents

Preventing the locking of vehicle wheels during braking

Info

Publication number
GB1347033A
GB1347033A GB1294771A GB1294771A GB1347033A GB 1347033 A GB1347033 A GB 1347033A GB 1294771 A GB1294771 A GB 1294771A GB 1294771 A GB1294771 A GB 1294771A GB 1347033 A GB1347033 A GB 1347033A
Authority
GB
United Kingdom
Prior art keywords
wheel
wheel cylinder
pressure
voltages
rate
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
GB1294771A
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19702021697 external-priority patent/DE2021697A1/en
Priority claimed from DE19712108350 external-priority patent/DE2108350A1/en
Application filed by Individual filed Critical Individual
Publication of GB1347033A publication Critical patent/GB1347033A/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
    • B60T8/32—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
    • B60T8/4208—Debooster systems
    • B60T8/4225—Debooster systems having a fluid actuated expansion unit
    • B60T8/4233—Debooster systems having a fluid actuated expansion unit with brake pressure relief by introducing fluid pressure into the expansion unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

1347033 Antilock braking systems D BLIESENER 4 May 1971 [4 May 1970 22 Feb 1971] 12947/71 Heading F2F In an antilock brake system voltage signals U B , U M respectively representative of rate of change of pressure in the wheel's brake cylinder and rate of change of frictional force between the wheel and a road surface control operation of a solenoid valve between a pressure source and wheel cylinder to prevent wheel-lock. A circuit is closed on commencement of the braking by a switch 2 and voltages U B and U M are respectively fed to the primary coils of transformers 4, 6 and 5, 7 to induce a voltage corresponding to the rate of change of U B and U M in the secondary coils. Transformers 4, 5, 6, 7 are connected in series to amplifiers 8, 9, 10, 11 of which 8, 9 amplify voltages induced with voltages U B and U M rising, 10 amplifies the induced voltage when U B declines and 11 amplifies every voltage induced by U M . If the wheel cylinder pressure rises while the frictional force declines or remains constant, or if the wheel cylinder pressure remains constant while the frictional force drops the circuit to coil 3 of a solenoid valve is closed through the amplified induction voltages and switches 12, 13, 14, 15. Coil 3 causes a chamber 9<SP>1</SP> of a modulating device to be connected to the engine intake manifold causing movement of a diaphragm 10<SP>1</SP> and piston 11<SP>1</SP> to open a one way valve 14<SP>1</SP> and cause pressure to act on a differential piston 1<SP>1</SP> to close communication between the pressure source and wheel cylinder through passages 2<SP>1</SP>, 4<SP>1</SP>, and close a non-return valve. After the termination of lock piston 11<SP>1</SP> is released and fluid in the wheel cylinder passes to the pressure source through one way valve 8<SP>1</SP>. The wheel cylinder pressure and friction force are measured piezo-electrically or by extensometer strips. The fluid may be liquid or compressed air. The friction force may be measured directly or may be determined indirectional from the horizontal reaction force between the wheel and road or the horizontal reaction force acting on the wheel bearing or the horizontal bending moment on the wheel suspension.
GB1294771A 1970-05-04 1971-05-04 Preventing the locking of vehicle wheels during braking Expired GB1347033A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702021697 DE2021697A1 (en) 1970-05-04 1970-05-04 Procedure for preventing the vehicle wheels from locking during braking with maximum deceleration
DE19712108350 DE2108350A1 (en) 1971-02-22 1971-02-22 Pressure regulating device for hydraulic brakes

Publications (1)

Publication Number Publication Date
GB1347033A true GB1347033A (en) 1974-02-13

Family

ID=25759076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1294771A Expired GB1347033A (en) 1970-05-04 1971-05-04 Preventing the locking of vehicle wheels during braking

Country Status (3)

Country Link
FR (1) FR2088318B1 (en)
GB (1) GB1347033A (en)
SE (1) SE382781B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195808A (en) * 1988-04-07 1993-03-23 Oddvard Johnsen Method and system for non-locking and non-skidding braking/traction of a vehicle wheel
US5249851A (en) * 1988-04-07 1993-10-05 Oddvard Johnsen Method and system for non-locking and non-skidding braking/traction of a vehicle wheel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1378958A (en) * 1963-09-30 1964-11-20 Hispano Suiza Sa Improvements to braking devices for aerodyne landing gears, in particular to those with hydraulic servo control
FR1407168A (en) * 1964-06-16 1965-07-30 Hispano Suiza Sa Improvements to servo-controlled braking devices for vehicles called upon to taxi, in particular for aerodynes
FR1395193A (en) * 1964-04-28 1965-04-09 North American Aviation Inc Wheel brake control system
US3498682A (en) * 1967-09-05 1970-03-03 Eaton Yale & Towne Braking system
US3486800A (en) * 1968-03-21 1969-12-30 Kelsey Hayes Co Skid control system including hydraulic modulating valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195808A (en) * 1988-04-07 1993-03-23 Oddvard Johnsen Method and system for non-locking and non-skidding braking/traction of a vehicle wheel
US5249851A (en) * 1988-04-07 1993-10-05 Oddvard Johnsen Method and system for non-locking and non-skidding braking/traction of a vehicle wheel

Also Published As

Publication number Publication date
SE382781B (en) 1976-02-16
FR2088318B1 (en) 1975-09-26
FR2088318A1 (en) 1972-01-07

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees