GB1396413A - Anti-lock vehicle brake systems - Google Patents

Anti-lock vehicle brake systems

Info

Publication number
GB1396413A
GB1396413A GB2010572A GB2010572A GB1396413A GB 1396413 A GB1396413 A GB 1396413A GB 2010572 A GB2010572 A GB 2010572A GB 2010572 A GB2010572 A GB 2010572A GB 1396413 A GB1396413 A GB 1396413A
Authority
GB
United Kingdom
Prior art keywords
output
rate
wheel
value
reference 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
GB2010572A
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB2010572A priority Critical patent/GB1396413A/en
Priority to US00352586A priority patent/US3854779A/en
Priority to NL7305892A priority patent/NL7305892A/xx
Priority to SE7305980A priority patent/SE379015B/xx
Priority to IT6818973A priority patent/IT984487B/en
Priority to DE19732321659 priority patent/DE2321659A1/en
Priority to CA169,876A priority patent/CA993085A/en
Priority to JP4766173A priority patent/JPS563815B2/ja
Priority to FR7315674A priority patent/FR2183136B1/fr
Publication of GB1396413A publication Critical patent/GB1396413A/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
    • 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
    • B60T8/1764—Regulation during travel on surface with different coefficients of friction, e.g. between left and right sides, mu-split or between front and rear
    • 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
    • B60T8/58—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 responsive to speed and another condition or to plural speed conditions

Landscapes

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

Abstract

1396413 Antiskid braking systems MULLARD Ltd 9 April 1973 [1 May 1972 20 Oct 1972] 20105/72 and 48529/72 Heading F2F An antiskid braking system control circuit has means responsive to a signal having a quantity which is a function of wheel speed to produce an output signal to energize a solenoid brake release valve when the said quantity has changed at a rate in excess of a first reference rate and by an amount greater than a predetermined percentage than its amount would have been had it continued at the first reference rate, means for replacing the first rate by a second reference rate which corresponds to a value of deceleration greater than the firstvalue, means for replacing the second reference rate by a third rate, after the second rate has persisted for a predetermined period of time, the third reference rate corresponding to a first value of wheel acceleration and means for deenergizing the solenoid when the said quantity attains either the second reference rate or third reference rate whichever prevails at the time, the prevailing reference rate being replaced by the said first reference rate when the solenoid is de-energized. A brake pedal FP operates a modulator M to control the application of fluid pressure from a source S to a wheel brake WB, an antilock control unit CU, wheel speed sensor SE and control circuit CC being also provided. Sensor SE produces pulses of frequency proportional to wheel speed which are fed to a frequency to D.C. converter 10 whose output is fed to a deceleration/acceleration detector 11 and to a speed reference element 12 and low deceleration detector 13. A reference control element 14 fields reference signals to element 11 and when the rate of change of magnitude of the signal from element 11 exceeds the first value of wheel deceleration and also signifies a given value of wheel slip a bi-stable 15 is triggered to produce via an automatic turn-off element 16 an output which energizes an output stage 17. Input pulses from the sensor are applied to reset element 15 which is held triggered until the output from element 11 is terminated. The output from element 15 is also fed (via 16) through an OR gate 18, an inhibit gate 19 and turn-off delay element 20 to element 12 to synchronize the operation of the latter with the output for solenoid energization, the output from element 15 being also fed via an OR gate 21 to inhibit the detector 13 at this time. Element 14 can be reset in three ways, if element 11 detects the first value of wheel acceleration, if element 13 detects the end of a second, low, value of acceleration or by means of element 16 which becomes responsive after, say, 0À5 seconds. Element 13 is normally held inhibited while the solenoid energization output and the output from element 12 are present but in the absence of output from element 12 it can respond to the end of said second acceleration condition to produce a pulse that inhibits gate 19 and allows element 14 to be reset.
GB2010572A 1972-05-01 1972-05-01 Anti-lock vehicle brake systems Expired GB1396413A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB2010572A GB1396413A (en) 1972-05-01 1972-05-01 Anti-lock vehicle brake systems
US00352586A US3854779A (en) 1972-05-01 1973-04-19 Anti-lock vehicle brake systems
NL7305892A NL7305892A (en) 1972-05-01 1973-04-27
SE7305980A SE379015B (en) 1972-05-01 1973-04-27
IT6818973A IT984487B (en) 1972-05-01 1973-04-27 ANTI-LOCK BRAKING SYSTEM FOR VEHICLES
DE19732321659 DE2321659A1 (en) 1972-05-01 1973-04-28 ANTI-LOCK BRAKE SYSTEM FOR VEHICLES
CA169,876A CA993085A (en) 1972-05-01 1973-04-30 Anti-lock vehicle brake systems
JP4766173A JPS563815B2 (en) 1972-05-01 1973-05-01
FR7315674A FR2183136B1 (en) 1972-05-01 1973-05-02

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2010572A GB1396413A (en) 1972-05-01 1972-05-01 Anti-lock vehicle brake systems
GB4852972 1972-10-20

Publications (1)

Publication Number Publication Date
GB1396413A true GB1396413A (en) 1975-06-04

Family

ID=26254453

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2010572A Expired GB1396413A (en) 1972-05-01 1972-05-01 Anti-lock vehicle brake systems

Country Status (7)

Country Link
JP (1) JPS563815B2 (en)
CA (1) CA993085A (en)
DE (1) DE2321659A1 (en)
FR (1) FR2183136B1 (en)
GB (1) GB1396413A (en)
IT (1) IT984487B (en)
NL (1) NL7305892A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1421106A (en) * 1974-05-02 1976-01-14 Mullard Ltd Anti-lokc venhicle brake systems
JPS5842348Y2 (en) * 1975-08-20 1983-09-26 日本電気株式会社 Red-bellied red bean sprouts
JPS59179834U (en) * 1983-05-19 1984-12-01 進和工業有限会社 Automatic plate feeding device for plates etc.
JPS6478964A (en) * 1987-09-19 1989-03-24 Sumitomo Electric Industries Anti-lock control device
JPH02120466U (en) * 1989-03-17 1990-09-28
CN111263630B (en) 2017-10-31 2023-12-08 株式会社资生堂 Oil-in-water type emulsified solid cosmetic

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1231430A (en) * 1968-12-10 1971-05-12
US3574417A (en) * 1969-05-13 1971-04-13 Bendix Corp Full power adaptive braking system for use with a proportional solenoid
US3674320A (en) * 1970-07-15 1972-07-04 Bendix Corp Adaptive braking control system
GB1362964A (en) * 1971-07-27 1974-08-14 Mullard Ltd Anti-lock vehicle brake systems

Also Published As

Publication number Publication date
NL7305892A (en) 1973-11-05
FR2183136B1 (en) 1976-09-10
IT984487B (en) 1974-11-20
JPS563815B2 (en) 1981-01-27
FR2183136A1 (en) 1973-12-14
JPS4941792A (en) 1974-04-19
DE2321659A1 (en) 1973-11-22
CA993085A (en) 1976-07-13

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Legal Events

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