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US4493210A
Expired / Lapsed
US
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Anti-block control system test
Assignee: Robert Bosch GmbH
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Filing: 1982-06-22
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Granted: 1985-01-15
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Expires: 2002-06-22
Abstract
Abstract An anti-block control system has four identically designed control channels. Safety circuits (8, 8') are also provided for monitoring the system, as are devices for testing the operability of the system. In this test, performed while the vehicle is stopped or when it is started, a test signal is fed into the channels and the effects of this signal are compared, in pairs, at locations of the controller corresponding to one another. A signal train is formed when the comparison is made. In accordance with the invention, two safety circuits (8, 8') are provided, each associated with a pair of channels, and the signals from all the channels are supplied, in pairs, to the safety circuits. The safety circuits include timing elements. During a test cycle, the signal trains in the two channel pairs generated by using the test signal are compared with one another by use of two comparator circuits (23, 23'), and in the case of non-agreement, a warning or switching signal (18, 18', 31) is generated.
Inventors
- 👤 Herbert Fries
- 👤 Jurgen Gerstenmaier
- 👤 Stefan Kircher
- 👤 Jurgen Koch-Ducker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:24
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/88; B60T8/885; B60T2270/00; B60T2270/40; B60T2270/406; B60T2270/413; Y; Y10; Y10S; Y10S303/00; Y10S303/09
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
281 words
Anti-wheel block control system for separately monitoring the wheels of a vehicle having four identical control channels, each control channel including a sensor (S1, S2, S3, S4) sensing wheel behavior, an evaluation circuit (6, 6') evaluating the output signals from the associated sensor, and a brake control unit (16, 14; 17, 15; 16', 14'; 17', 15') coupled to and being controlled by the respective evaluation circuit, one channel, each, being associated with a wheel brake of the vehicle; a safety circuit means for monitoring the anti-wheel block system and for testing the operability of the anti-block control system at timed intervals in a test cycle and providing identical test signals, said identical test signals being coupled from the safety circuit means into all the channels; comparator means (C, C') within the safety circuit means connected to and comparing--by pairs--signals occurring at corresponding locations within said channels based on said test signals, for correspondence with respect to one another, the comparator means generating a malfunction output control signal if the compared signals deviate from one another, wherein, in accordance with the invention, the safety circuit means comprises separate safety circuits (8, 8') for each pair of channels including timing means for monitoring the temporal response time of the respective channels; and means for testing the operability of both safety circuit means and connected to both pairs of channels including at least one further comparator (23, 23'), being connected to the safety circuits (8, 8') for comparing, during the test cycle, agreement of the test signals separately generated for each channel pair, said at least one further comparator (23, 23') generating a malfunction output signal if the test signals differ from one another.
Claim 2
Dependent Claim
281 words
Anti-wheel block control system for separately monitoring the wheels of a vehicle having four identical control channels, each control channel including a sensor (S1, S2, S3, S4) sensing wheel behavior, an evaluation circuit (6, 6') evaluating the output signals from the associated sensor, and a brake control unit (16, 14; 17, 15; 16', 14'; 17', 15') coupled to and being controlled by the respective evaluation circuit, one channel, each, being associated with a wheel brake of the vehicle; a safety circuit means for monitoring the anti-wheel block system and for testing the operability of the anti-block control system at timed intervals in a test cycle and providing identical test signals, said identical test signals being coupled from the safety circuit means into all the channels; comparator means (C, C') within the safety circuit means connected to and comparing--by pairs--signals occurring at corresponding locations within said channels based on said test signals, for correspondence with respect to one another, the comparator means generating a malfunction output control signal if the compared signals deviate from one another, wherein, in accordance with the invention, the safety circuit means comprises separate safety circuits (8, 8') for each pair of channels including timing means for monitoring the temporal response time of the respective channels; and means for testing the operability of both safety circuit means and connected to both pairs of channels including at least one further comparator (23, 23'), being connected to the safety circuits (8, 8') for comparing, during the test cycle, agreement of the test signals separately generated for each channel pair, said at least one further comparator (23, 23') generating a malfunction output signal if the test signals differ from one another.
Claim 3
Dependent Claim
90 words
System according to claim 1, wherein the timing constants of said timing means are changeable during the course of the test cycle in a direction of shorter time constants; wherein the test signal includes signals having a characteristic to test operability of all paths within the safety circuit means; and wherein the at least one further comparator (23, 23') is additionally connected to the separate safety circuits (8, 8') and compares the responses of the safety circuits to the respective signals being applied to the system during the test cycle.
Claim 4
Dependent Claim
130 words
System according to claim 2, wherein the signals arising within the evaluation circuit and the safety circuit means are digital signals, the signals being transmitted from the evaluation circuits of the pairs of channels to the separate safety circuits in parallel digital form; further including parallel-serial converters (9, 9') sensing the signals being transmitted in parallel form and converting the signals to serial form, the serial signals being applied to the at least one further comparator (23, 23') and serial parallel converters (10, 10') connected to the separate safety circuits of the other pair of channels for reconverting the compared serial signals into parallel digital signals for processing within the individual safety circuits, the at least one further comparator (23, 23') comparing the signals applied thereto in serial comparison form.
Claim 5
Dependent Claim
130 words
System according to claim 1, wherein the signals arising within the evaluation circuit and the safety circuit means are digital signals, the signals being transmitted from the evaluation circuits of the pairs of channels to the separate safety circuits in parallel digital form; further including parallel-serial converters (9, 9') sensing the signals being transmitted in parallel form and converting the signals to serial form, the serial signals being applied to the at least one further comparator (23, 23') and serial parallel converters (10, 10') connected to the separate safety circuits of the other pair of channels for reconverting the compared serial signals into parallel digital signals for processing within the individual safety circuits, the at least one further comparator (23, 23') comparing the signals applied thereto in serial comparison form.
Claim 6
Dependent Claim
51 words
System according to claim 1, wherein two further comparators (23, 23') are provided, one each in each channel, and, respectively, connected to receive the test signals in one channel and compare said test signals of one channel with the test signals derived from the separate safety circuit of the other channel.
Claim 7
Dependent Claim
153 words
System according to claim 5, wherein the signals arising within the evaluation circuit and the safety circuit means are digital signals, the signals being transmitted from the evaluation circuit of the pairs of channels to the separate safety circuits in parallel digital form; further including parallel-serial converters (9, 9') sensing the test signals being transmitted in parallel form and converting the parallel test signals to serial form, the serial test signals being applied to the respective separate further comparators (23, 23'); said signals being further connected to serial-parallel converters (10, 10') connected to the separate safety circuits (8, 8') of the other channel for reconverting the serial test signals into parallel digital test signals for processing by the comparators (C, C') within the individual safety circuits; and wherein the separate comparators (23, 23') additionally compare the serial test signals being applied thereto by the serial-parallel converters, in serial form, of the respective channels.
Claim 8
Dependent Claim
251 words
Method of testing components of an anti-wheel block system having four identical control channels, each control channel including a sensor (S1, S2, S3, S4) sensing wheel behavior, an evaluation circuit (6, 6') evaluating the output signals from the associated sensor, and a brake control unit (16, 14; 17, 15; 16', 14'; 17', 15') coupled to and being controlled by the respective evaluation circuit, one channel, each, being associated with a wheel brake of the vehicle; a safety circuit means for monitoring the anti-wheel block system and for testing the operability of the anti-block control system at timed intervals in a test cycle and providing identical test signals, said identical test signals being coupled from the safety circuit means into all the channels; comparator means (C, C') within the safety circuit means connected to and comparing--by pairs--signals occurring at corresponding locations within said channels based on said test signals, for correspondence with respect to one another, the comparator means generating a malfunction output control signal if the compared signals deviate from one another, comprising, in accordance with the invention, the steps of monitoring the response times in a pair of channels, each associated with two sensors; monitoring the response of the safety circuits to the identical test signals; and comparing the signals occurring in the pairs of channels generated by means of the test signal, with one another, and generating a "malfunction" output signal in case of non-agreement of the signals in the two channel pairs, and in the respective safety circuits.
Claim 9
Dependent Claim
251 words
Method of testing components of an anti-wheel block system having four identical control channels, each control channel including a sensor (S1, S2, S3, S4) sensing wheel behavior, an evaluation circuit (6, 6') evaluating the output signals from the associated sensor, and a brake control unit (16, 14; 17, 15; 16', 14'; 17', 15') coupled to and being controlled by the respective evaluation circuit, one channel, each, being associated with a wheel brake of the vehicle; a safety circuit means for monitoring the anti-wheel block system and for testing the operability of the anti-block control system at timed intervals in a test cycle and providing identical test signals, said identical test signals being coupled from the safety circuit means into all the channels; comparator means (C, C') within the safety circuit means connected to and comparing--by pairs--signals occurring at corresponding locations within said channels based on said test signals, for correspondence with respect to one another, the comparator means generating a malfunction output control signal if the compared signals deviate from one another, comprising, in accordance with the invention, the steps of monitoring the response times in a pair of channels, each associated with two sensors; monitoring the response of the safety circuits to the identical test signals; and comparing the signals occurring in the pairs of channels generated by means of the test signal, with one another, and generating a "malfunction" output signal in case of non-agreement of the signals in the two channel pairs, and in the respective safety circuits.
Claim 10
Dependent Claim
71 words
Method according to claim 7, wherein the signals transmitted in the pairs of channels are parallel digital signals; including the step of converting the parallel digital signals to serial digital signals prior to said comparison step, and reconverting the signals to parallel digital signals after comparison to control the safety circuit as a function of the comparison and permit the safety circuit to respond to parallel digital signals being supplied thereto.
Claim 11
Dependent Claim
31 words
Method according to claim 7 wherein the safety circuits (8, 8') include timing circuits determining timing intervals, further including the step of changing the timing intervals determined by the timing circuits.
Claim 12
Dependent Claim
85 words
Method according to claim 7, wherein the signals transmitted in the pairs of channels are parallel digital signals; including the step of converting the parallel digital signal in any one channel to serial digital signals, and reconverting said serial digital signals to parallel digital signals, and coupling said reconverted parallel digital signals to the safety circuit of the other channel to effect a comparison of the parallel digital signals, after conversion and reconversion in one channel with the parallel digital signals in the other channel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |