JPS57151860A - Fault detecting device for speed sensor - Google Patents

Fault detecting device for speed sensor

Info

Publication number
JPS57151860A
JPS57151860A JP3742881A JP3742881A JPS57151860A JP S57151860 A JPS57151860 A JP S57151860A JP 3742881 A JP3742881 A JP 3742881A JP 3742881 A JP3742881 A JP 3742881A JP S57151860 A JPS57151860 A JP S57151860A
Authority
JP
Japan
Prior art keywords
signal
speed sensor
sensor
detected
speed
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.)
Pending
Application number
JP3742881A
Other languages
Japanese (ja)
Inventor
Isao Yamaki
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.)
Akebono Brake Industry Co Ltd
Original Assignee
Akebono Brake Industry Co Ltd
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 Akebono Brake Industry Co Ltd filed Critical Akebono Brake Industry Co Ltd
Priority to JP3742881A priority Critical patent/JPS57151860A/en
Publication of JPS57151860A publication Critical patent/JPS57151860A/en
Pending 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
    • B60T8/885—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
    • B60T2270/416—Wheel speed sensor failure

Landscapes

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

Abstract

PURPOSE:To detect the faults in a speed sensor and to prevent erroneous antiskid control in a simple constitution, by detecting the abnormal decrease in vehicle speed when a vehicle is not braked by the comparison with a simulated speed signal, and cutting a power source of an antiskid control circuit. CONSTITUTION:When the brake is not applied, a signal which follows a vehicle speed signal VW is generated by the speed sensor 1 and a frequency voltage converter 2. When the signal VW is quickly decreased by the braking, the decreasing rate is restricted below a specified upper limit. The simulated signal VT which is larger than the signal VW is generated from a simulated signal generator 3. When the sensor 1 is mulfunctioned when the brake is not applied, the state of VT>VW due to the abnormal decrease in the signal VW is detected, the output of a comparator 4 becomes a high level, and the fault of the sensor 1 is detected. Then an AND gate is turned ON, a contact 6' is closed by a relay 6, and a power supply fuse 7 in an antiskid control circuit is cut OFF. Therefore the fault of the speed sensor is detected in the simple constitution, and the erroneous control can be prevented.
JP3742881A 1981-03-16 1981-03-16 Fault detecting device for speed sensor Pending JPS57151860A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3742881A JPS57151860A (en) 1981-03-16 1981-03-16 Fault detecting device for speed sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3742881A JPS57151860A (en) 1981-03-16 1981-03-16 Fault detecting device for speed sensor

Publications (1)

Publication Number Publication Date
JPS57151860A true JPS57151860A (en) 1982-09-20

Family

ID=12497235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3742881A Pending JPS57151860A (en) 1981-03-16 1981-03-16 Fault detecting device for speed sensor

Country Status (1)

Country Link
JP (1) JPS57151860A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006172A1 (en) * 1985-04-18 1986-10-23 Robert Bosch Gmbh Process for the monitoring of a speed transmitter signal
JPS63183555U (en) * 1987-05-19 1988-11-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006172A1 (en) * 1985-04-18 1986-10-23 Robert Bosch Gmbh Process for the monitoring of a speed transmitter signal
JPS63183555U (en) * 1987-05-19 1988-11-25

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