GB1444550A – Anti-skid systems
– Google Patents
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
1972-11-25
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.)
1972-11-25
Filing date
1972-11-25
Publication date
1976-08-04
1972-11-25
Application filed by Dunlop Ltd
filed
Critical
Dunlop Ltd
1972-11-25
Priority to GB5457372A
priority
Critical
patent/GB1444550A/en
1973-11-20
Priority to AU62676/73A
priority
patent/AU6267673A/en
1973-11-23
Priority to FR7341792A
priority
patent/FR2207823B1/fr
1973-11-24
Priority to DE19732358582
priority
patent/DE2358582A1/en
1973-11-28
Priority to IT3169973A
priority
patent/IT1003243B/en
1976-08-04
Publication of GB1444550A
publication
Critical
patent/GB1444550A/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
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
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
1972
1972-11-25
GB
GB5457372A
patent/GB1444550A/en
not_active
Expired
1973
1973-11-20
AU
AU62676/73A
patent/AU6267673A/en
not_active
Expired
1973-11-23
FR
FR7341792A
patent/FR2207823B1/fr
not_active
Expired
1973-11-24
DE
DE19732358582
patent/DE2358582A1/en
active
Pending
1973-11-28
IT
IT3169973A
patent/IT1003243B/en
active
Also Published As
Publication number
Publication date
FR2207823A1
(en)
1974-06-21
DE2358582A1
(en)
1974-06-12
AU6267673A
(en)
1975-05-22
FR2207823B1
(en)
1977-06-10
IT1003243B
(en)
1976-06-10
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Legal Events
Date
Code
Title
Description
1976-12-15
PS
Patent sealed
1985-07-10
PCNP
Patent ceased through non-payment of renewal fee
