GB1456345A - Circuit for detecting the rate of increase of the speed of a wheeled vehicle - Google Patents

Circuit for detecting the rate of increase of the speed of a wheeled vehicle

Info

Publication number
GB1456345A
GB1456345A GB494575A GB494575A GB1456345A GB 1456345 A GB1456345 A GB 1456345A GB 494575 A GB494575 A GB 494575A GB 494575 A GB494575 A GB 494575A GB 1456345 A GB1456345 A GB 1456345A
Authority
GB
United Kingdom
Prior art keywords
signal
circuit
voltage
input
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
GB494575A
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.)
DBA SA
Original Assignee
DBA SA
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 DBA SA filed Critical DBA SA
Publication of GB1456345A publication Critical patent/GB1456345A/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
    • B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

1456345 Anti-skid braking systems SOC ANON DBA 5 Feb 1975 [22 Feb 1974] 4945/75 Heading F2F An anti-skid braking system includes a circuit (Fig. 1) comprising a differential amplifier 28 with a first input 1 connected to a source of a voltage V representing the peripheral speed of a wheel, a second input 2 connected to a source 38/42 of a voltage U tending to increase linearly with time and a diode 40 or other unidirectional device with a threshold voltage u between the inputs 2 and 1, the amplifier 28 producing an output (V) connected to the input 2 and the circuit producing an output control signal A when the speed input signal V increases at a greater rate than the signal U. As shown the signal A is provided from an NPN transistor 32 and a PNP transistor 34 and the signal U from a constant current charging circuit 42 and a capacitor 38. Normally the voltages U and V differ by the threshold u (Fig. 2) but when the voltage V increases faster than the charging rate of the capacitor 38 as the unbraked wheel accelerates, t 1 -t 2 , the differential amplifier 28 is triggered to produce a straight edged signal T at t 2 to re-activate the brake. At t 3 the signal T is cancelled as the output U again exceeds the voltage V as the wheel is slowed. The braking system in Fig. 3 further comprises a solenoid isolating valve 10 connected by a diode D1 to the circuit, a logic control element 12 responsive to a particular value of speed decrease connected to a solenoid relief valve 14 and via a monostable 16 to the isolating valve 10, the monostable also being connected to the relief valve 14 and responsive to the output A of the above circuit. In use (Fig. 4) a signal C from the logic control element 12 actuates the isolating and relief valves 10 and 14 (D and I in Fig. 4), the monostable 16 continues their actuation until time tc when the brake relief ceases but the signal T from the above circuit maintains the isolating valve operative until time td.
GB494575A 1974-02-22 1975-02-05 Circuit for detecting the rate of increase of the speed of a wheeled vehicle Expired GB1456345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7406049A FR2261910B1 (en) 1974-02-22 1974-02-22

Publications (1)

Publication Number Publication Date
GB1456345A true GB1456345A (en) 1976-11-24

Family

ID=9135307

Family Applications (1)

Application Number Title Priority Date Filing Date
GB494575A Expired GB1456345A (en) 1974-02-22 1975-02-05 Circuit for detecting the rate of increase of the speed of a wheeled vehicle

Country Status (6)

Country Link
JP (1) JPS5849415B2 (en)
DE (1) DE2507587C2 (en)
FR (1) FR2261910B1 (en)
GB (1) GB1456345A (en)
IT (1) IT1031889B (en)
SE (1) SE400936B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111452781A (en) * 2020-03-24 2020-07-28 东南大学 Strong-robustness self-adaptive driving anti-skid control method for improving acceleration comfort of hub motor driven electric automobile

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2058782A5 (en) * 1969-09-25 1971-05-28 Dba
FR2141596B1 (en) * 1971-06-18 1974-03-08 Dba
US3768873A (en) * 1971-06-23 1973-10-30 Crane Co Brake control system
BE791296A (en) * 1971-12-02 1973-03-01 Dba Sa ANTI-LOCK ELECTRONIC BRAKING SYSTEM
FR2175585B1 (en) * 1972-03-15 1974-08-02 Dba

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111452781A (en) * 2020-03-24 2020-07-28 东南大学 Strong-robustness self-adaptive driving anti-skid control method for improving acceleration comfort of hub motor driven electric automobile

Also Published As

Publication number Publication date
DE2507587C2 (en) 1984-11-29
FR2261910A1 (en) 1975-09-19
FR2261910B1 (en) 1978-08-11
SE7501983L (en) 1975-08-25
SE400936B (en) 1978-04-17
JPS50120380A (en) 1975-09-20
IT1031889B (en) 1979-05-10
JPS5849415B2 (en) 1983-11-04
DE2507587A1 (en) 1975-08-28

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Legal Events

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

Effective date: 19940205