Patent US5684702A successfully refreshed from Google Patents.
US5684702A
Expired / Lapsed
US
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Control system having data correlation for controlling a vehicular anti-lock braking system
Assignee: ZF International UK Ltd
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Filing: 1994-06-16
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Granted: 1997-11-04
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Expires: 2014-06-16
Abstract
Abstract In a control system, for instance forming part of a vehicle anti-lock brake system, a plurality of control processors provides similar or identical control signals of the system in response to a shared transducer input. An independent data correlation processor compares data generated in the control processors for correlation and, in the absence of proper correlation, provides an indication which may be used to disable anti-lock operation of the brake system. In preferred embodiments, a four wheel vehicle with an anti-lock brake system is monitored by dual microprocessors. Each wheel has a speed sensor which supplies an input to each microprocessor. The data correlation processor compares the outputs of the microprocessors for each wheel and sends and alarm or disables the anti-lock brake system if the difference in the microprocessors output is beyond a limit amount.
Inventors
- 👤 Mark Ian Phillips
- 👤 John Anthony Bolton
- 👤 Anthony John Ainsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:24
CPC Classifications
B; B60; B60T; B60T8/00; G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/18; G06F11/187; G06F11/188; B60T8/32; B60T8/88; B60T8/885; G05; G05B; G05B9/00; G05B9/02; G05B9/03; G06F11/1629; G06F11/1641; G06F11/183; G06F11/184; B60T2270/00; B60T2270/40; B60T2270/416; B60W; B60W50/00; B60W50/02; B60W50/029; B60W2050/0292; B60W2050/0295; G06F11/0796
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
A control system comprising: a plurality of controllers, each of said controllers performing a substantially identical function and comprising a means, responsive to a common input, for providing a substantially identical control function output data; and arbitration means for arbitrating between said controllers, said arbitration means comprising a data processor means for comparing said data from each of said controllers for correlation and for providing an output indication of lack of correlation of said data, wherein each of said controllers comprises a control data processor and a memory for receiving parameter data from said control data processor, said data processor means receiving the parameter data from said memories and checking the parameter data for correlation and said memory of each of said controllers has a write only part for receiving the parameter data automatically from said control data processor and a read only part containing a copy of the parameter data written in said write only part for reading only by said data processor means.
Claim 2
Dependent Claim
165 words
A control system comprising: a plurality of controllers, each of said controllers performing a substantially identical function and comprising a means, responsive to a common input, for providing a substantially identical control function output data; and arbitration means for arbitrating between said controllers, said arbitration means comprising a data processor means for comparing said data from each of said controllers for correlation and for providing an output indication of lack of correlation of said data, wherein each of said controllers comprises a control data processor and a memory for receiving parameter data from said control data processor, said data processor means receiving the parameter data from said memories and checking the parameter data for correlation and said memory of each of said controllers has a write only part for receiving the parameter data automatically from said control data processor and a read only part containing a copy of the parameter data written in said write only part for reading only by said data processor means.
Claim 3
Independent Claim
437 words
A system for controlling the disabling of a vehicular anti-lock brake control system for a vehicle having wheels where the anti-lock system reduces braking pressure on a wheel which is determined to be locking, said disabling controlling system including: a plurality of wheel speed sensor means for providing an output indicative of the rotational speed of a respective wheel; a plurality of controllers, each of said controllers comprising a means, responsive to at least one wheel speed sensor means output, for providing data for substantially identical control functions; arbitration means for arbitrating between said controllers, said arbitration means comprising a data processor means for comparing said data from said controllers for correlation and for providing an output indication of an mount of correlation of said data; and means, responsive to said data processor means output indication of an amount of correlation of said data being less than a limit, for at least providing an alarm signal suggesting that an operator of the vehicle disable said anti-lock system, wherein said means for providing an alarm signal includes a means for disabling at least the brake pressure reduction of said anti-lock system, wherein said vehicle has four wheels, said plurality of speed sensor means comprises at least four speed sensors, at least one of said speed sensors associated with a respective one of said four wheels, said plurality of controllers comprising two microprocessors, each of said microprocessors including a separate channel responsive to each of said at least four speed sensors and the output from each sensor means is applied to each microprocessor, wherein said output data is data representative of wheel speed, and said correlation comprises comparison of the wheel speed data for one wheel applied to both microprocessors, and said limit of correlation is a function of the wheel speed, wherein said wheel speed data is reflective of wheel speeds from 0 to greater than 300 kilometers per hour, and said limit of correlation for the wheel speed range between 0 and 100 kilometers per hour is data indicative of a wheel speed difference of 1 kilometer per hour, said limit of correlation for the wheel speed range between 100 and 200 kilometers per hour is data indicative of a wheel speed difference of 2 kilometers per hour, said limit of correlation for the wheel speed range between 200 and 300 kilometers per hour is data indicative of a wheel speed difference of 3 kilometers per hour, and said limit of correlation for the wheel speed range of greater than 300 kilometers per hour is data indicative of a wheel speed difference of 4 kilometers per hour.
Claim 4
Independent Claim
437 words
A system for controlling the disabling of a vehicular anti-lock brake control system for a vehicle having wheels where the anti-lock system reduces braking pressure on a wheel which is determined to be locking, said disabling controlling system including: a plurality of wheel speed sensor means for providing an output indicative of the rotational speed of a respective wheel; a plurality of controllers, each of said controllers comprising a means, responsive to at least one wheel speed sensor means output, for providing data for substantially identical control functions; arbitration means for arbitrating between said controllers, said arbitration means comprising a data processor means for comparing said data from said controllers for correlation and for providing an output indication of an mount of correlation of said data; and means, responsive to said data processor means output indication of an amount of correlation of said data being less than a limit, for at least providing an alarm signal suggesting that an operator of the vehicle disable said anti-lock system, wherein said means for providing an alarm signal includes a means for disabling at least the brake pressure reduction of said anti-lock system, wherein said vehicle has four wheels, said plurality of speed sensor means comprises at least four speed sensors, at least one of said speed sensors associated with a respective one of said four wheels, said plurality of controllers comprising two microprocessors, each of said microprocessors including a separate channel responsive to each of said at least four speed sensors and the output from each sensor means is applied to each microprocessor, wherein said output data is data representative of wheel speed, and said correlation comprises comparison of the wheel speed data for one wheel applied to both microprocessors, and said limit of correlation is a function of the wheel speed, wherein said wheel speed data is reflective of wheel speeds from 0 to greater than 300 kilometers per hour, and said limit of correlation for the wheel speed range between 0 and 100 kilometers per hour is data indicative of a wheel speed difference of 1 kilometer per hour, said limit of correlation for the wheel speed range between 100 and 200 kilometers per hour is data indicative of a wheel speed difference of 2 kilometers per hour, said limit of correlation for the wheel speed range between 200 and 300 kilometers per hour is data indicative of a wheel speed difference of 3 kilometers per hour, and said limit of correlation for the wheel speed range of greater than 300 kilometers per hour is data indicative of a wheel speed difference of 4 kilometers per hour.
Claim 5
Dependent Claim
153 words
A control system comprising: a plurality of controllers, each of said controllers having an input means responsive to common input data, and arbitration means for arbitrating between said controllers, said arbitration means comprising a data processor for comparing data from said controllers for correlation and for providing an indication of lack of correlation, wherein each of said plurality of controllers performs a substantially identical function, wherein each of said controllers comprises a control data processor and a memory for receiving parameter data from said control data processor, said data processor receiving the parameter data from said memories and checking the parameter data for correlation and said memory of each of said controllers has a write only part for receiving the parameter data automatically from said control data processor and a read only part containing a copy of the parameter data written in said write only part for reading only by said data processor.
Claim 6
Dependent Claim
153 words
A control system comprising: a plurality of controllers, each of said controllers having an input means responsive to common input data, and arbitration means for arbitrating between said controllers, said arbitration means comprising a data processor for comparing data from said controllers for correlation and for providing an indication of lack of correlation, wherein each of said plurality of controllers performs a substantially identical function, wherein each of said controllers comprises a control data processor and a memory for receiving parameter data from said control data processor, said data processor receiving the parameter data from said memories and checking the parameter data for correlation and said memory of each of said controllers has a write only part for receiving the parameter data automatically from said control data processor and a read only part containing a copy of the parameter data written in said write only part for reading only by said data processor.
References Cited (Backward Citations)
US3618015A
Cited
US4198678A
Cited
US4358823A
Cited
US4493210A
Cited
GB2127507A
Cited
US4546437A
Cited
US4663715A
Cited
US4701854A
Cited
US4656588A
Cited
US4773072A
Cited
US4847757A
Cited
US5099417A
Cited
US5175841A
Cited
US5091856A
Cited
US4917443A
Cited
US5189617A
Cited
US5193887A
Cited
US5123497A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-11-03 | 2001-05-05 | 2001-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-03 | 2005-05-05 | 2005-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-03 | 2009-05-05 | 2009-11-04 | $7700.00 | Window Closed / Lapsed |