IT1116563B - Wheel-slip brake pressure control system - includes fault detector for monitoring malfunction of wheel speed sensor or mis-timed solenoid energisation - Google Patents

Wheel-slip brake pressure control system - includes fault detector for monitoring malfunction of wheel speed sensor or mis-timed solenoid energisation

Info

Publication number
IT1116563B
IT1116563B IT4896079A IT4896079A IT1116563B IT 1116563 B IT1116563 B IT 1116563B IT 4896079 A IT4896079 A IT 4896079A IT 4896079 A IT4896079 A IT 4896079A IT 1116563 B IT1116563 B IT 1116563B
Authority
IT
Italy
Prior art keywords
wheel
energisation
solenoid
speed sensor
control system
Prior art date
Application number
IT4896079A
Other languages
Italian (it)
Other versions
IT7948960A0 (en
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 US05/903,705 external-priority patent/US4219244A/en
Priority claimed from US05/903,860 external-priority patent/US4224568A/en
Application filed by Wagner Electric Corp filed Critical Wagner Electric Corp
Publication of IT7948960A0 publication Critical patent/IT7948960A0/en
Application granted granted Critical
Publication of IT1116563B publication Critical patent/IT1116563B/en

Links

Abstract

The fault detector is for a wheel-slip control system. It is of a type with a wheel-speed sensor (14) of which the output signal provides selective energisation of a brake-fluid pressure control solenoid (22) via a control circuit (18). The detector provids an output (36) for warming or for shutting down the wheel slip control system if there is (i) over-long energisation of the brake-pressure reducing solenoid (22); or (ii) repetitive energisation of the solenoid for very short periods, or (iii) malfunction of a wheel speed sensor (14) such that its output contains erroneous cyclic variations. Upon energisation of th solenoid the value stored in a memory (28) is increased. The memory is reset when solenoid energisation ceases. Prolonged energisation causes the value stored to exceed a threshold (34) and the alarm output is generated.
IT4896079A 1978-05-08 1979-05-07 Wheel-slip brake pressure control system - includes fault detector for monitoring malfunction of wheel speed sensor or mis-timed solenoid energisation IT1116563B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/903,705 US4219244A (en) 1978-05-08 1978-05-08 Fault detector for wheel slip control system
US05/903,860 US4224568A (en) 1978-05-08 1978-05-08 Frequency to digital converter

Publications (2)

Publication Number Publication Date
IT7948960A0 IT7948960A0 (en) 1979-05-07
IT1116563B true IT1116563B (en) 1986-02-10

Family

ID=27129373

Family Applications (1)

Application Number Title Priority Date Filing Date
IT4896079A IT1116563B (en) 1978-05-08 1979-05-07 Wheel-slip brake pressure control system - includes fault detector for monitoring malfunction of wheel speed sensor or mis-timed solenoid energisation

Country Status (1)

Country Link
IT (1) IT1116563B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2289748A1 (en) * 2009-08-24 2011-03-02 Robert Bosch GmbH Good checking for vehicle wheel speed sensors
US8260516B2 (en) 2009-08-24 2012-09-04 Robert Bosch Gmbh Good checking for vehicle brake light switch
US8401730B2 (en) 2009-08-24 2013-03-19 Robert Bosch Llc Good checking for vehicle lateral acceleration sensor
US8754764B2 (en) 2009-08-24 2014-06-17 Robert Bosch Gmbh Good checking for vehicle pressure sensor
US8935037B2 (en) 2009-08-24 2015-01-13 Robert Bosch Gmbh Good checking for vehicle steering angle sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2289748A1 (en) * 2009-08-24 2011-03-02 Robert Bosch GmbH Good checking for vehicle wheel speed sensors
US8260516B2 (en) 2009-08-24 2012-09-04 Robert Bosch Gmbh Good checking for vehicle brake light switch
US8401730B2 (en) 2009-08-24 2013-03-19 Robert Bosch Llc Good checking for vehicle lateral acceleration sensor
US8754764B2 (en) 2009-08-24 2014-06-17 Robert Bosch Gmbh Good checking for vehicle pressure sensor
US8935037B2 (en) 2009-08-24 2015-01-13 Robert Bosch Gmbh Good checking for vehicle steering angle sensor

Also Published As

Publication number Publication date
IT7948960A0 (en) 1979-05-07

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