GB1233746A - - Google Patents

Info

Publication number
GB1233746A
GB1233746A GB1233746DA GB1233746A GB 1233746 A GB1233746 A GB 1233746A GB 1233746D A GB1233746D A GB 1233746DA GB 1233746 A GB1233746 A GB 1233746A
Authority
GB
United Kingdom
Prior art keywords
valve
switch
transistor
assembly
capacitor
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
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 filed Critical
Publication of GB1233746A publication Critical patent/GB1233746A/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
    • B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/90—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using a simulated speed signal to test speed responsive control means
    • 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
    • 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
    • B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/885—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/406—Test-mode; Self-diagnosis

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

1,233,746. Anti-skid systems; testing braking systems. KELSEY-HAYES CO. 18 June, 1968 [19 June, 1967], No. 28921/68. Headings F2E and F2F. An anti-skid hydraulic control system for a vehicle includes a pressure modulating valve 24 which is caused to be cycled automatically each time the vehicle driver operates the vehicle ignition switch SW, a valve checking electrical circuit also being connected with the modulating valve 24 and responsive to a preselected deviation from the predetermined cycle of the valve 24 which is indicative of valve malfunction to provide an electric warning signal. As particularly described, the modulating valve 24 is connected between a master cylinder assembly 20 and the rear wheel brake cylinders 12. A solenoid 48 of the valve 24 is energizable by the output from wheel sensors 28 indicative of a skid condition to cause one side 50 of a diaphragm assembly 42 in a vacuum chamber housing 40 to be disconnected from vacuum and connected to atmosphere via line 56; this causes an hydraulic piston 46 to move within its cylinder housing 44 to increase the volume of cylinder housing 44 and simultaneously to close a check valve 76 to disconnect cylinder housing 44 from the master cylinder assembly 20. The pressure in cylinder 12 is thereby relieved. Cycling the valve: The coil 104 of solenoid 48 is also connected between earth and the positive terminal B+ of a battery via a transistor Q1 and switches SW1, SW2 of ignition switch SW. Switch SW2 and a further switch SW2a are closed when the ignition is turned on, and switch SW1 is also closed when the engine of the vehicle is started; hence when the engine is started the coil 104 is energized and the valve 24 is cycled. Checking the valve cycle: A switch SW3 is maintained open by contact with diaphragm assembly 42 when its side 50 is connected to vacuum and is closed when the assembly 42 moves a predetermined distance. Closing of switch SW1 on starting the engine causes a capacitor C1 of a first timing circuit to be charged and the charge after a pre-set time will cause a normally non-conductive uni-junction transistor UJ1 to conduct to trigger a siliconcontrolled rectifier SCR1 to light a warning lamp L. However, this will only happen if the switch SW3 has not closed-if this has occurred a transistor Q3 is rendered conductive through which the capacitor Cl will discharge. Thus in this part of the cycle ignition of the lamp L indicates that the assembly 42 has not been displaced or has been displaced too slowly. To check that the assembly 42 returns in a preset time a capacitor C2 of a second timing circuit is charged through a transistor Q2 from terminal B+ from the moment switch SW1 is opened and coil 104 is de-energized. After a preset time the charge on capacitor C2 will cause transistor UJ2 and rectifier SCR2 to conduct to lamp L, if a transistor Q4 is not rendered conductive in this time by re-opening of the switch SW3. Additionally the output from deceleration sensor 28 is connected to these circuits via a control module 26 to check the operation of the valve each time the sensor 38 transmits a signal.
GB1233746D 1967-06-19 1968-06-18 Expired GB1233746A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64700167A 1967-06-19 1967-06-19

Publications (1)

Publication Number Publication Date
GB1233746A true GB1233746A (en) 1971-05-26

Family

ID=24595312

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5828070A Expired GB1235450A (en) 1967-06-19 1968-06-18 Improvements in or relating to skid control systems for wheeled vehicles
GB1233746D Expired GB1233746A (en) 1967-06-19 1968-06-18

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB5828070A Expired GB1235450A (en) 1967-06-19 1968-06-18 Improvements in or relating to skid control systems for wheeled vehicles

Country Status (5)

Country Link
JP (2) JPS5114669B1 (en)
DE (1) DE1755741C3 (en)
FR (1) FR1604834A (en)
GB (2) GB1235450A (en)
SE (2) SE344311B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427935A1 (en) * 1978-06-08 1980-01-04 Bosch Gmbh Robert HYDRAULIC BRAKE AMPLIFIER

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1439928A (en) * 1972-07-14 1976-06-16 Lucas Electrical Ltd Road vehicle anti-skid braking systems
DE2323358C2 (en) * 1973-05-09 1984-12-20 Robert Bosch Gmbh, 7000 Stuttgart Test device for an anti-lock control system
GB1462531A (en) * 1973-07-25 1977-01-26 Clayton Manufacturing Co Computer type brake analyzer
JPS5233968U (en) * 1975-09-02 1977-03-10
DE2612461A1 (en) * 1976-03-24 1977-10-13 Bosch Gmbh Robert TEST DEVICE FOR AN ANTI-LOCK CONTROL SYSTEM
JPS52158063U (en) * 1976-05-26 1977-12-01
JPS5342979U (en) * 1976-09-20 1978-04-13
JPS5342980U (en) * 1976-09-20 1978-04-13
DE3213008A1 (en) * 1982-04-07 1983-10-20 Robert Bosch Gmbh, 7000 Stuttgart VALVE DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427935A1 (en) * 1978-06-08 1980-01-04 Bosch Gmbh Robert HYDRAULIC BRAKE AMPLIFIER

Also Published As

Publication number Publication date
GB1235450A (en) 1971-06-16
DE1755741C3 (en) 1979-03-29
SE365469B (en) 1974-03-25
JPS5145032B1 (en) 1976-12-01
DE1755741B2 (en) 1973-09-20
FR1604834A (en) 1972-04-17
SE344311B (en) 1972-04-10
DE1755741A1 (en) 1972-03-02
JPS5114669B1 (en) 1976-05-11

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years