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GB1277857A - Anti-skid braking - Google Patents

Anti-skid braking

Info

Publication number
GB1277857A
GB1277857A GB6155370A GB6155370A GB1277857A GB 1277857 A GB1277857 A GB 1277857A GB 6155370 A GB6155370 A GB 6155370A GB 6155370 A GB6155370 A GB 6155370A GB 1277857 A GB1277857 A GB 1277857A
Authority
GB
United Kingdom
Prior art keywords
wheel
braking
signal
value
slip
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
GB6155370A
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.)
Fiat SpA
Original Assignee
Fiat SpA
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 Fiat SpA filed Critical Fiat SpA
Publication of GB1277857A publication Critical patent/GB1277857A/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

Landscapes

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

Abstract

1277857 Antiskid braking systems FIAT SpA 29 Dec 1970 [13 Jan 1970] 61553/70 Heading F2F In an antiskid braking system a solenoid valve 16 located in a line between a master cylinder 10 and brake cylinder is controlled by a signal generated by ascertaining the value of wheel slip at an instant not earlier than the instant of initiation of release of braking and resuming the braking when the slip of the wheel again reaches such a value. When a pedal 12 is depressed fluid passes through the normally open valve 16 to brake wheel 22. If the deceleration of the wheel exceeds a certain value a tachometer 24 supplying a signal to a threshold circuit 28 via a differentiating circuit 26 causes circuit 28 to set a flip-flop 34, which through an amplifier 36 causes solenoid 16 to be energized to release the braking action on wheel 22. At the same time a linear function generator 30, receiving a vehicle deceleration signal from accelerometer 40, is triggered by the output signal from threshold circuit 28 causing it to apply a signal to a comparator 44. When the wheel speed signal from tachometer 24 and the fictitious wheel speed signal from linear function generator 30 are equal indicating that the slip value is that which it had at the moment of brake release, comparator 44 resets flip-flop 34 which causes valve 16 to become de-energized and restore braking on wheel 22. To restore braking for a larger value of slip a delay circuit 50, Fig. 5 (not shown) is provided in the conductor 32 connecting the threshold circuit 28 to generator 30.
GB6155370A 1970-01-13 1970-12-29 Anti-skid braking Expired GB1277857A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6708570 1970-01-13

Publications (1)

Publication Number Publication Date
GB1277857A true GB1277857A (en) 1972-06-14

Family

ID=11299443

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6155370A Expired GB1277857A (en) 1970-01-13 1970-12-29 Anti-skid braking

Country Status (3)

Country Link
DE (1) DE2101237A1 (en)
FR (1) FR2076076B1 (en)
GB (1) GB1277857A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2404009A1 (en) * 1973-02-06 1974-08-08 Waldemar Lester ELECTRONIC CONTROL FOR AUTOMATIC ANTI-LOCK BRAKING SYSTEMS OF HYDRAULIC VEHICLE BRAKES
DE3819424A1 (en) * 1988-06-07 1989-12-14 Lucas Ind Plc METHOD FOR REGULATING THE BRAKE PRESSURE IN A BLOCK-PROTECTED VEHICLE BRAKE SYSTEM

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1364343A (en) * 1963-07-19 1964-06-19 Knorr Bremse Gmbh Anti-slip or anti-slip device for rail vehicles
US3467443A (en) * 1967-08-17 1969-09-16 Nippon Denso Co Antiskid apparatus for automotive vehicles
GB1204266A (en) * 1968-02-07 1970-09-03 Westinghouse Brake & Signal Braking systems and/or tractive systems

Also Published As

Publication number Publication date
FR2076076B1 (en) 1975-02-21
FR2076076A1 (en) 1971-10-15
DE2101237A1 (en) 1972-04-20

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Legal Events

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