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 energisationInfo
- 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
Links
- 230000007257 malfunction Effects 0.000 title abstract 2
- 238000012544 monitoring process Methods 0.000 title 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000003252 repetitive effect Effects 0.000 abstract 1
- 238000010792 warming Methods 0.000 abstract 1
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.
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)
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 |
-
1979
- 1979-05-07 IT IT4896079A patent/IT1116563B/en active
Cited By (5)
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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