GB1282800A - Improvements in anti-skid braking systems - Google Patents

Improvements in anti-skid braking systems

Info

Publication number
GB1282800A
GB1282800A GB5998770A GB5998770A GB1282800A GB 1282800 A GB1282800 A GB 1282800A GB 5998770 A GB5998770 A GB 5998770A GB 5998770 A GB5998770 A GB 5998770A GB 1282800 A GB1282800 A GB 1282800A
Authority
GB
United Kingdom
Prior art keywords
potentiometer
valve
wheel
dec
conductor
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
GB5998770A
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
Priority claimed from IT7111870A external-priority patent/IT957066B/en
Application filed by Fiat SpA filed Critical Fiat SpA
Publication of GB1282800A publication Critical patent/GB1282800A/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
    • B60T8/321—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 deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/326—Hydraulic 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
    • 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
    • B60T8/36—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 including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3655—Continuously controlled electromagnetic valves

Landscapes

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

Abstract

1282800 Antiskid braking systems FIAT SpA 17 Dec 1970 [31 Dec 1969 11 Dec 1970] 59987/70 Heading F2F An antiskid braking system has a solenoid valve 26 controlling hydraulic fluid flow from a pump 10 to a reservoir 14 to control the pressure applied to a wheel cylinder 20 and being driven by a pedal operated potentiometer 34 the solenoid 28 being operable through an antiskid signal fed from a tachogenerator 54 denoting incipient wheel lock to exhaust the pump delivery to the reservoir 14 when the wheel deceleration exceeds a predetermined limit. In the embodiment shown the solenoid valve 26 comprises a valve member 88 which opens an inlet 96 to an outlet passage 86, the communication between these passages being progressively closed during normal braking to allow fluid to pressurise wheel cylinder 20 as the potentiometer output varies with pedal travel. The potentiometer is fed with a constant voltage supply 35 and its output passes via preamplifier 36, capacitor 38 and conductor 42 to a junction 43. When wheel-lock is detected the tachogenerator signal passes by way of capacitor 56, parallel resistor 58, conductor 60, Schmitt trigger 62 and conductor 64 to an NPN transistor 52 and then to junction 43. A voltage source 53 is then caused to pass a voltage to the junction 43 and then to a power amplifier 46 which delivers maximum power to the solenoid 26 allowing the valve to relieve braking pressure. In another embodiment, Fig. 3 (not shown), the normally closed valve 26 is replaced by a normally open solenoid valve (126), transistor (152) is of the PNP type and the sliding contact (132) is biased in its rest position to the low voltage end of the potentiometer 34.
GB5998770A 1969-12-31 1970-12-17 Improvements in anti-skid braking systems Expired GB1282800A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT5458469 1969-12-31
IT7111870A IT957066B (en) 1970-12-11 1970-12-11 VEHICLE BRAKING SYSTEM WITH THE PREVENTION OF WHEEL SLIP BY MEANS OF ELECTROMODULATOR ELECTRIC VALVE

Publications (1)

Publication Number Publication Date
GB1282800A true GB1282800A (en) 1972-07-26

Family

ID=26329609

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5998770A Expired GB1282800A (en) 1969-12-31 1970-12-17 Improvements in anti-skid braking systems

Country Status (3)

Country Link
DE (1) DE2064562A1 (en)
FR (1) FR2072156B3 (en)
GB (1) GB1282800A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982207A3 (en) * 1998-08-28 2001-04-25 Toyota Jidosha Kabushiki Kaisha Apparatus for increasing brake cylinder pressure by controlling pump motor and reducing the pressure by controlling electric energy applied to control valve

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807056A1 (en) * 1988-03-04 1989-09-14 Teves Gmbh Alfred Brake system for vehicles
JP2709163B2 (en) * 1989-11-20 1998-02-04 住友電気工業株式会社 Brake system
FR2669883B1 (en) * 1990-11-29 1993-01-29 Bendix Europ Services Tech AUTOMATIC BRAKING DEVICE FOR VEHICLE.
DE4137123A1 (en) * 1991-11-12 1993-05-13 Teves Gmbh Alfred PRESSURE CONTROL VALVE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982207A3 (en) * 1998-08-28 2001-04-25 Toyota Jidosha Kabushiki Kaisha Apparatus for increasing brake cylinder pressure by controlling pump motor and reducing the pressure by controlling electric energy applied to control valve
US6913326B1 (en) 1998-08-28 2005-07-05 Toyota Jidosha Kabushiki Kaisha Apparatus for increasing brake cylinder pressure by controlling pump motor and reducing the pressure by controlling electric energy applied to control valve

Also Published As

Publication number Publication date
FR2072156A7 (en) 1971-09-24
FR2072156B3 (en) 1973-02-02
DE2064562A1 (en) 1971-07-15

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Legal Events

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