Method for monitoring the performance reliability of a control unit and diagnostic device
First Claim
1. A method for monitoring, via a diagnostic device, a performance reliability of at least one of a control unit and at least one sensor of a safety device for protecting a vehicle occupant, the diagnostic device being arranged in a motor vehicle together with the control unit and the at least one sensor and the diagnostic device including an arrangement for coupling to the at least one sensor of the safety device, comprising the steps:
- a) recording, via the coupling, an impact;
b) deriving a value for an impact severity from the impact;
c) comparing, by a comparator of the diagnostic device that provides a predefined threshold value for a proper functioning of the at least one of the control unit and the at least one sensor, the value for the impact severity to the predefined threshold value; and
d) outputting, by an output device of the diagnostic device, an error-function signal in the event that the value for the impact severity exceeds the predefined threshold value, the error-function signal indicating that a proper functioning is no longer ensured for the at least one of the control unit and the at least one sensor;
wherein the predefined threshold value is lower than a threshold value provided for a triggering of a restraining arrangement assigned to the at least one of the control unit and the at least one sensor.
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Accused Products
Abstract
The present arrangement provides a method for monitoring the performance reliability of a control unit and/or at least one sensor of a safety device for the protection of vehicle occupants, comprising the steps that a negative acceleration or velocity caused by an impact, in particular, be recorded; a value for the impact severity be derived from the recorded acceleration or velocity; and the value for the impact severity be compared to a predefined threshold value. If the value for the impact severity exceeds the predefined threshold value, an error-function signal will be output, which indicates that the proper functioning can no longer be ensured for the control unit and/or for at least one sensor. The present arrangement also relates to a diagnostic device for such a method.
13 Citations
11 Claims
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1. A method for monitoring, via a diagnostic device, a performance reliability of at least one of a control unit and at least one sensor of a safety device for protecting a vehicle occupant, the diagnostic device being arranged in a motor vehicle together with the control unit and the at least one sensor and the diagnostic device including an arrangement for coupling to the at least one sensor of the safety device, comprising the steps:
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a) recording, via the coupling, an impact; b) deriving a value for an impact severity from the impact; c) comparing, by a comparator of the diagnostic device that provides a predefined threshold value for a proper functioning of the at least one of the control unit and the at least one sensor, the value for the impact severity to the predefined threshold value; and d) outputting, by an output device of the diagnostic device, an error-function signal in the event that the value for the impact severity exceeds the predefined threshold value, the error-function signal indicating that a proper functioning is no longer ensured for the at least one of the control unit and the at least one sensor; wherein the predefined threshold value is lower than a threshold value provided for a triggering of a restraining arrangement assigned to the at least one of the control unit and the at least one sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A diagnostic device for monitoring a performance reliability of at least one of a control unit and a least one sensor of a safety device for protecting a vehicle occupant, comprising:
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an arrangement for coupling to the at least one sensor of the safety device to record an impact, the diagnostic device being arranged in a motor vehicle together with the control unit and the at least one sensor; a comparator that provides at least one predefined threshold value for a proper functioning of the at least one of the control unit and the at least one sensor, the comparator comparing a value for an impact severity derived from the impact to the predefined threshold value; and an output device that outputs an error-function signal in the event that the value for the impact severity exceeds the at least one predefined threshold value, the error-function signal indicating that a future proper functioning is no longer ensured for the at least one of the control unit and the at least one sensor; wherein the predefined threshold value is lower than a threshold value provided for a triggering of a restraining arrangement assigned to the at least one of the control unit and the at least one sensor. - View Dependent Claims (10, 11)
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Specification