GB1444550A - Anti-skid systems - Google Patents

Anti-skid systems

Info

Publication number
GB1444550A
GB1444550A GB5457372A GB5457372A GB1444550A GB 1444550 A GB1444550 A GB 1444550A GB 5457372 A GB5457372 A GB 5457372A GB 5457372 A GB5457372 A GB 5457372A GB 1444550 A GB1444550 A GB 1444550A
Authority
GB
United Kingdom
Prior art keywords
circuit
control
wheel
speed
low speed
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
GB5457372A
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.)
Dunlop Ltd
Original Assignee
Dunlop Ltd
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 Dunlop Ltd filed Critical Dunlop Ltd
Priority to GB5457372A priority Critical patent/GB1444550A/en
Priority to AU62676/73A priority patent/AU6267673A/en
Priority to FR7341792A priority patent/FR2207823B1/fr
Priority to DE19732358582 priority patent/DE2358582A1/en
Priority to IT3169973A priority patent/IT1003243B/en
Publication of GB1444550A publication Critical patent/GB1444550A/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
    • B60T8/32—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
    • B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/885—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/406—Test-mode; Self-diagnosis

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

1444550 Antiskid braking systems DUNLOP Ltd 15 Nov 1973 [25 Nov 1972] 54573/72 Heading F2F An antiskid brake control system for a vehicle such as an aircraft comprises separate control circuits for each braked wheel of a pair each such circuit including a wheel speed sensor 1 or la and being arranged to control the wheel braking pressure in accordance with preset criteria to alleviate skidding, each circuit also including an excess skid control circuit 9 having a means of recording the speed of the wheel under its control when the brake is first applied and progressively reducing this recorded speed signal in a predetermined manner, each circuit being so arranged that the brake cannot be reapplied until the actual speed signal from the wheel has risen to the level of the progressively reducing signal or the latter has reached zero, the circuits being intercoupled so that if during anti-skid operation the actual speed signal from a wheel sensor fails to rise to the level of the associated reducing speed signal before this reaches zero the control of the braking of that wheel is transferred to the other paired circuit. Each sensor 1, 1a produces an A.C. output which is fed to a square wave amplifier 2 and hence to a pulse generator 3 producing pulses of constant form and width. The output passes to a frequency to voltage converter 4 and is then differentiated in amplifier 5 to give a signal proportional to deceleration which is fed to a driver circuit 6 controlling a solenoid-operated brake pressure control valve 7. In order to preserve the low speed manoeuvrability of the aircraft the anti-skid control circuits are rendered inoperable below a preset minimum ground speed. The output of square wave amplifier 2, 2a is connected to a low speed detector 10 or 10a and a low speed comparator 11 or 11a arranged in series. Comparator 11 or 11a and excess skid control circuit 9 or 9a are coupled to a change-over control unit 12 or 12a the arrangement being that if both low speed comparators give an output indicating a speed below the preset minimum both control circuits are rendered inoperative. If only one comparator shows such a low speed the change-over control unit switches control to the other circuit. A test circuit includes a switch 14, run-down oscillator 15, indicator driver 16 and indicator light 18.
GB5457372A 1972-11-25 1972-11-25 Anti-skid systems Expired GB1444550A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB5457372A GB1444550A (en) 1972-11-25 1972-11-25 Anti-skid systems
AU62676/73A AU6267673A (en) 1972-11-25 1973-11-20 Anti-skid systems
FR7341792A FR2207823B1 (en) 1972-11-25 1973-11-23
DE19732358582 DE2358582A1 (en) 1972-11-25 1973-11-24 ANTI-LOCKING DEVICE FOR VEHICLES
IT3169973A IT1003243B (en) 1972-11-25 1973-11-28 IMPROVEMENTS IN THE NON-SLIP SYSTEMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5457372A GB1444550A (en) 1972-11-25 1972-11-25 Anti-skid systems

Publications (1)

Publication Number Publication Date
GB1444550A true GB1444550A (en) 1976-08-04

Family

ID=10471457

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5457372A Expired GB1444550A (en) 1972-11-25 1972-11-25 Anti-skid systems

Country Status (5)

Country Link
AU (1) AU6267673A (en)
DE (1) DE2358582A1 (en)
FR (1) FR2207823B1 (en)
GB (1) GB1444550A (en)
IT (1) IT1003243B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534904B2 (en) * 1975-08-05 1979-09-13 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Safety and monitoring circuit for anti-lock vehicle brakes
DE2543178A1 (en) * 1975-09-27 1977-04-07 Teldix Gmbh ANTI-LOCK CONTROL SYSTEM
DE2705737A1 (en) * 1977-02-11 1978-08-17 Wabco Westinghouse Gmbh Monitoring system for anti-skid brakes - has two regulator channels which change over when signal duration exceeds threshold
DE2712693A1 (en) * 1977-03-23 1978-09-28 Bosch Gmbh Robert ANTI-LOCK CONTROL SYSTEM
DE3136944A1 (en) * 1981-09-17 1983-03-31 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Safety circuit in an antilock brake system
DE3417144A1 (en) * 1983-06-10 1984-12-13 Nissan Motor Co., Ltd., Yokohama, Kanagawa Antilock brake control system with a plurality of independently functioning digital control units
DE3417019A1 (en) * 1984-05-09 1985-11-14 Alfred Teves Gmbh, 6000 Frankfurt CIRCUIT ARRANGEMENT FOR A SLIP-CONTROLLED VEHICLE BRAKE SYSTEM
DE4024790C1 (en) * 1990-08-04 1992-02-06 Man Nutzfahrzeuge Ag, 8000 Muenchen, De Pneumatic or hydraulic dual circuit braking installation - is for two axle aggregate of lorry, bus or similar motor vehicle with electronically controlled antilocking protection
DE4032825A1 (en) * 1990-10-16 1992-04-23 Man Nutzfahrzeuge Ag PNEUMATIC OR HYDRAULIC TWO-CIRCUIT BRAKE SYSTEM FOR THE WHEELS OF AN AXLE OF A TRUCK, OMNIBUSES OR THE LIKE VEHICLE
CN112623200B (en) * 2020-12-29 2022-11-22 中国航空工业集团公司西安飞机设计研究所 Brake control method for airplane skid resistance failure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1311638A (en) * 1962-01-12 1962-12-07 Dunlop Sa Aircraft braking device

Also Published As

Publication number Publication date
AU6267673A (en) 1975-05-22
FR2207823B1 (en) 1977-06-10
DE2358582A1 (en) 1974-06-12
IT1003243B (en) 1976-06-10
FR2207823A1 (en) 1974-06-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee