GB1281333A - Improvements in or relating to brake control apparatus for vehicles - Google Patents

Improvements in or relating to brake control apparatus for vehicles

Info

Publication number
GB1281333A
GB1281333A GB36096/68A GB3609668A GB1281333A GB 1281333 A GB1281333 A GB 1281333A GB 36096/68 A GB36096/68 A GB 36096/68A GB 3609668 A GB3609668 A GB 3609668A GB 1281333 A GB1281333 A GB 1281333A
Authority
GB
United Kingdom
Prior art keywords
signal
fed
circuit
output
frequency
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
GB36096/68A
Inventor
Alan Patrick Goss
Brian Shepherd
David Anthony Williams
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB36096/68A priority Critical patent/GB1281333A/en
Priority to US00154639A priority patent/US3796470A/en
Priority to DE2147184A priority patent/DE2147184A1/en
Priority to FR7137549A priority patent/FR2156442A1/fr
Priority claimed from FR7137549A external-priority patent/FR2156442A1/fr
Publication of GB1281333A publication Critical patent/GB1281333A/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

1281333 Antiskid brake systems SMITHS INDUSTRIES Ltd 25 July 1969 [29 July 1968] 36096/68 Heading F2F A brake control apparatus for a vehicle comprising a generator 1 producing a signal at a frequency proportional to the angular velocity of a braked wheel of a vehicle; a circuit responsive to the signal to produce an output signal having a frequency dependent on the frequency of said generator signal, includes an auxiliary circuit arranged to adjust the output signal whenever a rate of change of frequency indicating deceleration of the vehicle exceeds a predetermined rate and means sensitive to the adjusted signal to produce a brake release signal. The output signal of generator 1 is fed to a squarer 2 which produces complementary output waveforms A, A and of which signal A is fed to a diode /transistor pump 3 producing an output D.C. signal the amplitude of which is proportional to the frequency of the output of generator 1 and which responds rapidly to changes of frequency of the signal fed to it. The output signal of the diode /transistor pump 3 is fed to a circuit 4 including a capacitor which is discharged in dependence on the output signal of the diode/transistor pump 3 and which is connected in series with a circuit which limits the rate at which the potential across the capcitor can change during deceleration of the vehicle so that when the vehicle decelerates at above a predetermined rate the output signal of circuit 4 lags that of circuit 3, the said output signal of circuit 4 being fed to a variable width monostable 5 to control the width of its output pulses B, B<SP>1</SP>. Outputs A, A<SP>1</SP>, B, B<SP>1</SP> are fed to AND gates 7, 8 the outputs of which are fed to a bi-stable controlling a power switch 6 which operates the brake release.
GB36096/68A 1968-07-29 1968-07-29 Improvements in or relating to brake control apparatus for vehicles Expired GB1281333A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB36096/68A GB1281333A (en) 1968-07-29 1968-07-29 Improvements in or relating to brake control apparatus for vehicles
US00154639A US3796470A (en) 1968-07-29 1971-06-18 Improvements in or relating to brake control apparatus
DE2147184A DE2147184A1 (en) 1968-07-29 1971-09-22 BRAKE CONTROL UNIT
FR7137549A FR2156442A1 (en) 1968-07-29 1971-10-19

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB36096/68A GB1281333A (en) 1968-07-29 1968-07-29 Improvements in or relating to brake control apparatus for vehicles
DE2147184A DE2147184A1 (en) 1968-07-29 1971-09-22 BRAKE CONTROL UNIT
FR7137549A FR2156442A1 (en) 1968-07-29 1971-10-19

Publications (1)

Publication Number Publication Date
GB1281333A true GB1281333A (en) 1972-07-12

Family

ID=27183719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36096/68A Expired GB1281333A (en) 1968-07-29 1968-07-29 Improvements in or relating to brake control apparatus for vehicles

Country Status (2)

Country Link
DE (1) DE2147184A1 (en)
GB (1) GB1281333A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2400377A1 (en) * 1973-01-10 1974-07-18 Kelsey Hayes Co BLOCK REGULATOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2400377A1 (en) * 1973-01-10 1974-07-18 Kelsey Hayes Co BLOCK REGULATOR

Also Published As

Publication number Publication date
DE2147184A1 (en) 1973-03-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee