GB1508688A - Method and apparatus for regulating braking forces on vehicle wheels - Google Patents

Method and apparatus for regulating braking forces on vehicle wheels

Info

Publication number
GB1508688A
GB1508688A GB3841875A GB3841875A GB1508688A GB 1508688 A GB1508688 A GB 1508688A GB 3841875 A GB3841875 A GB 3841875A GB 3841875 A GB3841875 A GB 3841875A GB 1508688 A GB1508688 A GB 1508688A
Authority
GB
United Kingdom
Prior art keywords
wheel
signal
slip
pressure
master cylinder
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
GB3841875A
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Publication of GB1508688A publication Critical patent/GB1508688A/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
    • B60T8/58—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
    • 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
    • B60T8/1763—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to the coefficient of friction between the wheels and the ground surface
    • B60T8/17633—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to the coefficient of friction between the wheels and the ground surface based on analogue circuits or digital circuits comprised of discrete electronic elements

Abstract

1508688 Antiskid systems DAIMLERBENZ AG 18 Sept 1975 [3 Oct 1974] 38418/75 Heading F2F Apparatus for regulating braking force on the wheels of a vehicle wherein the braking moment applied to a wheel is varied according to a function of both wheel slip and master cylinder pressure. Wheel slip # is computed from vehicle velocity ox and wheel speed #, the latter being measured by a sensor 11 on wheel 10, according to the formula where R is the dynamic tyre radius. The wheel slip signal # is fed to a memory 14 which outputs a signal f(#), having a value between fixed values # and 1À0, to a multiplier 15 which also receives a signal corresponding to pressure P H in master cylinder 6. The multiplier 15 thus outputs a desired brake cylinder pressure signal P R des(=f(#).P H ) which is compared at comparator 16 with the actual brake cylinder pressure P R act resulting in regulation of the supply pressure to the brake cylinder 9 from master cylinder 6 by regulator 17. The signal f(#) varies with # as set out below according to where lies in relation to threshold slip values # a and # b 0#### a : f(#)=1 # a #### b : f(#) decreases linearly from 1À0 at #=# a to # at #=# b # b ###1: f(#)=# # a and # b are predetermined according to the stipulation that, at the point of intersection of the curve of braking moment (proportional to P R ) M B with slip with the curve of transmissible torque between wheel and road (see Fig. 2). In a second embodiment the values of # a and # b vary with steering angle # L .
GB3841875A 1974-10-03 1975-09-18 Method and apparatus for regulating braking forces on vehicle wheels Expired GB1508688A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742447182 DE2447182C2 (en) 1974-10-03 1974-10-03 Method and device for regulating the brake pressure on the wheels of a vehicle

Publications (1)

Publication Number Publication Date
GB1508688A true GB1508688A (en) 1978-04-26

Family

ID=5927416

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3841875A Expired GB1508688A (en) 1974-10-03 1975-09-18 Method and apparatus for regulating braking forces on vehicle wheels

Country Status (3)

Country Link
DE (1) DE2447182C2 (en)
FR (1) FR2286736A1 (en)
GB (1) GB1508688A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484938A1 (en) * 1980-06-23 1981-12-24 Goodyear Aerospace Corp ANTI-BLOCKING DEVICE FOR BRAKES OF A VEHICLE

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3119144C2 (en) * 1981-05-14 1985-01-17 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Anti-lock hydraulic vehicle braking system
SE450563B (en) * 1983-11-01 1987-07-06 Folke Ivar Blomberg ELECTRONIC SENSOR FOR VEHICLES WITH A CLEAR-FREE BRAKE SYSTEM
DE3500745A1 (en) * 1985-01-11 1986-07-17 Alfred Teves Gmbh, 6000 Frankfurt METHOD AND CIRCUIT ARRANGEMENT FOR ADJUSTING THE SLIP CONTROL TO THE CURRENT FRICTION VALUE
DE3916672A1 (en) * 1988-03-18 1990-11-29 Teves Gmbh Alfred Controlling two channel brake antilocking system - measuring wheel rotation behaviour and evaluating to produce vehicle reference speed and brake pressure regulating signals
DE3909588A1 (en) * 1989-03-23 1990-09-27 Bosch Gmbh Robert METHOD FOR DETERMINING THE BRAKE TORQUE OF A VEHICLE
DE3928649A1 (en) * 1989-08-30 1991-03-07 Teves Gmbh Alfred Antilock braking system with sequential pressure modulation - matches wheel brake pressure to desired values independently of modulation in master cylinder
DE3932569A1 (en) * 1989-09-29 1991-04-11 Bosch Gmbh Robert BRAKE PRESSURE CONTROL SYSTEM
DE4034814A1 (en) * 1990-11-02 1992-05-07 Bosch Gmbh Robert ANTI-LOCK CONTROL SYSTEM

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508795A (en) * 1967-03-28 1970-04-28 Kelsey Hayes Co Anti-skid braking system
US3547500A (en) * 1969-03-06 1970-12-15 Kelsey Hayes Co Skid control system
DE2140658B2 (en) * 1971-08-13 1978-03-16 Daimler-Benz Ag, 7000 Stuttgart Brake force regulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484938A1 (en) * 1980-06-23 1981-12-24 Goodyear Aerospace Corp ANTI-BLOCKING DEVICE FOR BRAKES OF A VEHICLE

Also Published As

Publication number Publication date
FR2286736B1 (en) 1978-08-18
DE2447182C2 (en) 1986-03-27
DE2447182A1 (en) 1976-04-15
FR2286736A1 (en) 1976-04-30

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee