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GB1388989A - Anti-lock brake control systems - Google Patents

Anti-lock brake control systems

Info

Publication number
GB1388989A
GB1388989A GB4631573A GB4631573A GB1388989A GB 1388989 A GB1388989 A GB 1388989A GB 4631573 A GB4631573 A GB 4631573A GB 4631573 A GB4631573 A GB 4631573A GB 1388989 A GB1388989 A GB 1388989A
Authority
GB
United Kingdom
Prior art keywords
signal
resistor
amplifier
compared
output
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
GB4631573A
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.)
Motors Liquidation Co
Original Assignee
General Motors Corp
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 General Motors Corp filed Critical General Motors Corp
Publication of GB1388989A publication Critical patent/GB1388989A/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
    • 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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)

Abstract

1388989 Anti-skid control systems GENERAL MOTORS CORP 4 Oct 1973 [1 Nov 1972] 46315/73 Heading F2F In an anti-lock control system for at least one braked vehicle wheel, a differentiated wheel rotational speed electrical signal is compared with a deceleration reference signal continuously variable as a function of wheel speed in a uniform manner therewith over a predetermined range, the difference therebetween being integrated and compared with a threshold value to form a control signal to a modulator. The rotational velocity of one or more braked wheels is sensed by a wheel or transmission mounted tachogenerator which supplies a sinusoidal electrical signal along lines 14, 16 through resistors to an amplifier 62 which acts on differential input currents. A feedback resistor 66 and a capacitor 68 provide an output of similar frequency in the form of a square wave. An amplifier 72 with a feedback capacitor 74 and a resistor 78 converts the frequency signal to a voltage output which passes through a diode 76 whose forward breakdown voltage causes signals representing 3 m.p.h. or less to be inhibited; also signal ripples are inhibited. This signal is differentiated by a capacitor 84 and compared at 30 with a signal formed of a constant value, as determined by a positive potential-coupled resistor 86, and a wheel speed dependent value, as determined by the resistor 88. The compared signal is integrated by a capacitor-coupled amplifier 32 and compared with threshold values by circuitry 36. Here, an amplifier 94 receives the signal as one input and incorporates a feedback resistor 98; a negative input is resistor-coupled to a transistor 104 which is conductive during steady-state operation to provide a reference value at this input. If the integrated signal (velocity error signal) exceeds an equivalent of 2¢ m.p.h. the amplifier switches to provide an output through a resistor 114 to an output driver 40 comprising coupled transistors 116, 118 which are rendered conductive to energize a solenoid 44<SP>1</SP> of a valve, actuating the modulator which is responsive to air pressure and vacuum, the latter being controlled by the valve. Due to hysteresis in the resistor 98 the output is retained until the velocity error signal drops below an equivalent to 1 m.p.h. Then the transistor 104 is cut-off for 130 milliseconds to cause additional current flow to the reference input of the amplifier 94 to inhibit possible noise signals.
GB4631573A 1972-11-01 1973-10-04 Anti-lock brake control systems Expired GB1388989A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30282672A 1972-11-01 1972-11-01

Publications (1)

Publication Number Publication Date
GB1388989A true GB1388989A (en) 1975-04-03

Family

ID=23169368

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4631573A Expired GB1388989A (en) 1972-11-01 1973-10-04 Anti-lock brake control systems

Country Status (4)

Country Link
JP (1) JPS4977087A (en)
DE (1) DE2352323A1 (en)
FR (1) FR2204524A1 (en)
GB (1) GB1388989A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2616795A1 (en) * 1976-04-15 1977-10-27 Knorr Bremse Gmbh PROCEDURE FOR PREVENTING THE BLOCKING OF WHEELS OF VEHICLES, IN PARTICULAR RAIL VEHICLES AND DEVICE FOR CARRYING OUT THE PROCEDURE
DE2855843A1 (en) * 1978-12-22 1980-07-10 Knorr Bremse Gmbh Antilock brake control for trains - has dynamic coupling between monitoring circuits having output signals fed to comparator
DE3600647A1 (en) * 1986-01-11 1987-07-16 Teves Gmbh Alfred Arrangement for controlling a brake system with wheel-slip control
DE4017845B4 (en) * 1990-06-02 2004-04-01 Continental Teves Ag & Co. Ohg Circuit arrangement for a motor vehicle with traction control
US5323896A (en) * 1993-06-24 1994-06-28 Jones W Charles Article packaging kit, system and method
US5678695A (en) * 1995-10-11 1997-10-21 Sealed Air Corporation Packaging structure
US6148590A (en) 1995-10-11 2000-11-21 Sealed Air Corporation Packaging structure
US5694744A (en) * 1996-02-29 1997-12-09 Jones; William Charles Article packaging kit, and method
US5676245A (en) * 1996-04-02 1997-10-14 Jones; William Charles Article packaging kit, system and method
WO1999064317A1 (en) 1998-06-10 1999-12-16 Motion Design, Inc. Box with an internal resilient element
US5893462A (en) * 1998-07-01 1999-04-13 Sealed Air Corporation Retention package
US6158589A (en) * 1999-09-23 2000-12-12 Motion Design, Inc. Boxes with internal resilient elements
US6311843B1 (en) 1999-10-01 2001-11-06 Motion Design, Inc. Packaging boxes and components with internal resilient elements
US6302274B1 (en) 1999-12-01 2001-10-16 Sealed Air Corporation (Us) Suspension and retention packaging structures and methods for forming same
US6490844B1 (en) 2001-06-21 2002-12-10 Emerging Technologies Trust Film wrap packaging apparatus and method
US6920981B2 (en) 2003-01-03 2005-07-26 Ade, Inc. Suspension packages and systems, cushioning panels, and methods of using same
US9352891B2 (en) 2012-12-28 2016-05-31 Ade, Inc. Suspension packaging structures and methods of making and using the same
US10035638B1 (en) 2013-08-12 2018-07-31 Ade, Inc. Retention package with article-loading aperture and method of making and using the same

Also Published As

Publication number Publication date
JPS4977087A (en) 1974-07-25
DE2352323A1 (en) 1974-05-09
FR2204524A1 (en) 1974-05-24

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed