GB1393842A - Wheel slip control systems for automotive vehicles and the like - Google Patents

Wheel slip control systems for automotive vehicles and the like

Info

Publication number
GB1393842A
GB1393842A GB1354074A GB1354074A GB1393842A GB 1393842 A GB1393842 A GB 1393842A GB 1354074 A GB1354074 A GB 1354074A GB 1354074 A GB1354074 A GB 1354074A GB 1393842 A GB1393842 A GB 1393842A
Authority
GB
United Kingdom
Prior art keywords
signal
fed
reference value
pulse
gate
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
GB1354074A
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.)
Wagner Electric Corp
Original Assignee
Wagner Electric 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
Priority claimed from US00233579A external-priority patent/US3833268A/en
Application filed by Wagner Electric Corp filed Critical Wagner Electric Corp
Publication of GB1393842A publication Critical patent/GB1393842A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/56—Devices characterised by the use of electric or magnetic means for comparing two speeds
    • 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
    • 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
    • B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—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 having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/361—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 having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force wherein the pilot valve is mounted in a circuit controlling an auxiliary fluid system
    • 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
    • B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
    • B60T8/42—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 having a fluid pressure regulator responsive to a speed condition having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4208—Debooster systems
    • B60T8/4225—Debooster systems having a fluid actuated expansion unit
    • B60T8/4241—Debooster systems having a fluid actuated expansion unit pneumatically
    • B60T8/425—Debooster systems having a fluid actuated expansion unit pneumatically using a vacuum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/0891—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values with indication of predetermined acceleration values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/16—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Regulating Braking Force (AREA)

Abstract

1393842 Pulse processing circuits WAGNER ELECTRIC CORP 7 March 1973 [10 March 1972] 13540/74 Divided out of 1393841 Heading H3T In the vehicle wheel braking system of the parent Specification, the brake pressure is relieved when a limiting deceleration is exceeded and not reapplied until a preset acceleration is achieved. As shown (Fig. 1), the angular velocity of two wheels are measured at 10, 16 and fed to a selector 22 which passes the lower signal v(t) to a differentiator 30 producing a rate of change signal a(t). The deceleration signal produced when the brakes are applied is compared at 32 with a reference value to pass on a pulse to OR gate 34, when the reference value is exceeded, and open gate 36, allowing the velocity signal v(t) to be fed to a unit 38, where the reducing v(t) signal is subtracted from v 1 , the initial v(t) signal reaching unit 38, and the difference v 1 -v(t) is compared with a variable reference signal #v from unit 40, which is inversely proportional to a(t). When the reference signal #v is the greater of the two inputs, a pulse is sent from comparator 38 to OR gate 42, to energize solenoid 46 and relieve the brake pressure. The deceleration signal a(t) then decreases until the output from circuit 32 is terminated, the gating elements 34, 36, 42 are closed after a delay determined by a timer 50, braking pressure is reapplied and the process is restarted. The timer 50 also inhibits the reapplication of braking pressure until the acceleration of the sensed wheel exceeds a reference value fed to comparator 54, in order to cope with wheel lock conditions produced by a road surface having a low coefficient of friction.
GB1354074A 1972-03-10 1973-03-07 Wheel slip control systems for automotive vehicles and the like Expired GB1393842A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00233579A US3833268A (en) 1972-03-10 1972-03-10 Wheel slip control system for automotive vehicles and the like
GB1096473A GB1393841A (en) 1972-03-10 1973-03-07 Wheel slip control system for automotive vehicles and the like

Publications (1)

Publication Number Publication Date
GB1393842A true GB1393842A (en) 1975-05-14

Family

ID=26247894

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1354074A Expired GB1393842A (en) 1972-03-10 1973-03-07 Wheel slip control systems for automotive vehicles and the like

Country Status (1)

Country Link
GB (1) GB1393842A (en)

Similar Documents

Publication Publication Date Title
US4593955A (en) Yaw-compensated vehicle anti-skid system
GB2016621A (en) Anti-skid braking systems of motor vehicles
GB1273422A (en) Skid control system
GB1245620A (en) Antilocking control system for vehicle brakes
GB1241282A (en) Anti-skid device
GB1359112A (en) Anti-skid control system for motor vehicles
SE8604083D0 (en) CLUTCH DEVICE FOR ADJUSTING THE BRAKE PRESSURE IN A BRAKE PLANT WITH REGULATION OF THE TRUCK AND WITH THE WHEEL DRIVE
GB1505507A (en) Skid control system
GB1393841A (en) Wheel slip control system for automotive vehicles and the like
GB1410127A (en) Anti-locking control systems
US3532392A (en) Anti-skid braking system
GB1472915A (en) Anti-lock braking system
EP0282031A3 (en) Vehicle braking system for drive wheels, having means for delaying commencement of brake pressure change
GB1361619A (en) Vehicle brake control system
EP0416100A4 (en)
GB1517319A (en) Wheel slip control system for automotive vehicles and the like
GB1191216A (en) Anti-Skid Device for a Vehicle Braking System
GB1481733A (en) Anti-lock braking control system
CA2120227A1 (en) Anti-Lock Brake System Wherein Brake Pressure for Higher-Speed Rear Wheel is Made Than That for Lower-Speed Rear Wheel
CA1189594A (en) Anti-lock device for regulating the brake pressure of vehicle brakes
GB1393842A (en) Wheel slip control systems for automotive vehicles and the like
GB1344427A (en) Controlling spin of the driven wheels of a motor vehicle
US4308583A (en) Anti-skid device for a motor vehicle braking system
EP0339590A3 (en) Anti-skid brake control system for automotive vehicle with feature of derivation of road surface friction representative data
GB1314294A (en) Anti-skid braking system for automotive vehicles

Legal Events

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