GB1235016A - Brake pressure control system - Google Patents

Brake pressure control system

Info

Publication number
GB1235016A
GB1235016A GB5598469A GB5598469A GB1235016A GB 1235016 A GB1235016 A GB 1235016A GB 5598469 A GB5598469 A GB 5598469A GB 5598469 A GB5598469 A GB 5598469A GB 1235016 A GB1235016 A GB 1235016A
Authority
GB
United Kingdom
Prior art keywords
speed
vehicle
approximate
control system
wheel speed
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
GB5598469A
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.)
Nabco Ltd
Original Assignee
Nabco 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 Nabco Ltd filed Critical Nabco Ltd
Publication of GB1235016A publication Critical patent/GB1235016A/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

Abstract

1,235,016. Anti-skid systems. NIPPON AIR-BRAKE CO. Ltd. 14 Nov., 1969 [20 Nov., 1968], No. 55984/69. Heading F2F. In a brake pressure control system for a vehicle having speed detecting means for detecting the wheel speed of the vehicle and reference speed setting means including memory means for storing an output delivered from the speed detecting means at the moment of brake pressure application, the control system comprises an electrical circuit for giving an approximate reference deceleration of the vehicle during actuation of the brakes, means for computing an approximate vehicle speed from the reference deceleration and the wheel speed stored in the memory means, and means for comparing the wheel speed obtained by the speed detecting means with the approximate vehicle speed thereby to carry out on-off control of the brakes depending on the result of comparison therebetween. As shown, when the wheels of a vehicle start to decelerate due to braking action and the voltage generated by the speed-responsive generator 1 is reduced to a value lower than the voltage downstream of a diode 2, the speed detector is cut off from a capacitor 3 the output of which is applied to an integrating computer 5 comprising a D.C. power source 8, a resistor 4 and a grounded emitter transistor 9, the amount of discharge from the circuit being fixed by the resistor at a constant value corresponding to a predetermined deceleration of the vehicle. An approximate speed Vs of the vehicle put out by the computer 5 is applied to a voltage dividing circuit 6 having a setting of (1-S i ), where S i is the desired slip rate, and which carries out the computation of V s (1-S i ). A differential amplifier 7 compares the wheel speed W delivered from the generator 1 with the output from the multiplier 6 and the signal therefrom is applied to a brake actuating circuit.
GB5598469A 1968-11-20 1969-11-14 Brake pressure control system Expired GB1235016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10124068 1968-11-20

Publications (1)

Publication Number Publication Date
GB1235016A true GB1235016A (en) 1971-06-09

Family

ID=14295359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5598469A Expired GB1235016A (en) 1968-11-20 1969-11-14 Brake pressure control system

Country Status (1)

Country Link
GB (1) GB1235016A (en)

Cited By (4)

* 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
US3966264A (en) * 1973-07-23 1976-06-29 Sharp Kabushiki Kaisha Compensation for anti-skid brake control system
FR2467121A1 (en) * 1979-10-09 1981-04-17 Nissan Motor SYSTEM AND METHOD FOR MONITORING THE BRAKES OF A MOTOR VEHICLE
FR2470035A1 (en) * 1979-11-20 1981-05-29 Nissan Motor BRAKE CONTROL SYSTEM FOR A MOTOR VEHICLE AND METHOD FOR CONTROLLING THE APPLICATION AND REMOVAL OF PRESSURE TO A BRAKING DEVICE

Cited By (4)

* 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
US3966264A (en) * 1973-07-23 1976-06-29 Sharp Kabushiki Kaisha Compensation for anti-skid brake control system
FR2467121A1 (en) * 1979-10-09 1981-04-17 Nissan Motor SYSTEM AND METHOD FOR MONITORING THE BRAKES OF A MOTOR VEHICLE
FR2470035A1 (en) * 1979-11-20 1981-05-29 Nissan Motor BRAKE CONTROL SYSTEM FOR A MOTOR VEHICLE AND METHOD FOR CONTROLLING THE APPLICATION AND REMOVAL OF PRESSURE TO A BRAKING DEVICE

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