Testing apparatus for an anti-lock control system
First Claim
1. A testing apparatus for an anti-lock control system for vehicle brakes, for testing the correct functioning of the control system, the control system including at least one vehicle related speed sensor, which senses an increasing vehicle speed, and means for analyzing the output signal from the speed sensor, the testing apparatus comprising the following switching devices:
- (a) test signal producing means connected to the means for analyzing, for producing a test signal which is delivered to the means for analyzing to initiate a test procedure, said test signal producing means including means for receiving the output of the means for analyzing to determine the correctness of said output; and
(b) first triggering signal producing means connected to the speed sensor and to the test signal producing means, for producing a triggering signal in response to the output of the speed sensor, when a predetermined speed as sensed by the speed sensor is exceeded, and delivering the triggering signal to the test signal producing means for triggering, said first triggering signal producing means including switch means responsive to actuation of the vehicle ignition switch and responsive to the test signal producing means, thereby ensuring that the test procedure is performed only at the first exceeding of the predetermined speed after the vehicle is initially set into operation.
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Abstract
A testing apparatus for an anti-lock control system for vehicle brakes for testing the correct functioning of the control system. In one embodiment, the apparatus establishes a predetermined speed and compares this predetermined speed to the speed sensed by the sensing portion of the control system. When the predetermined speed is exceeded by the moving vehicle a testing apparatus is triggered which initiates a test procedure for the control system. The apparatus includes a switching device to insure that a test procedure is initiated only after the vehicle ignition switch is actuated. In another embodiment, the apparatus employs a temperature sensor and/or the control system output for initiating a test procedure, but not during a deceleration of the vehicle. In a further variant, two threshold levels are established, each of which must be encountered before the test procedure is initiated.
25 Citations
7 Claims
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1. A testing apparatus for an anti-lock control system for vehicle brakes, for testing the correct functioning of the control system, the control system including at least one vehicle related speed sensor, which senses an increasing vehicle speed, and means for analyzing the output signal from the speed sensor, the testing apparatus comprising the following switching devices:
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(a) test signal producing means connected to the means for analyzing, for producing a test signal which is delivered to the means for analyzing to initiate a test procedure, said test signal producing means including means for receiving the output of the means for analyzing to determine the correctness of said output; and (b) first triggering signal producing means connected to the speed sensor and to the test signal producing means, for producing a triggering signal in response to the output of the speed sensor, when a predetermined speed as sensed by the speed sensor is exceeded, and delivering the triggering signal to the test signal producing means for triggering, said first triggering signal producing means including switch means responsive to actuation of the vehicle ignition switch and responsive to the test signal producing means, thereby ensuring that the test procedure is performed only at the first exceeding of the predetermined speed after the vehicle is initially set into operation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification