Method of detecting external impacts in vehicle steering systems
First Claim
1. A method of detecting external impacts in vehicle steering systems which include a rotatable steering shaft and a servomotor for generating a steering assist torque, the method comprising the steps of:
- (a) continuously measuring a first characteristic;
(b) continuously measuring a second characteristic;
(c) forming tuples of characteristics at least from a measured value of the first characteristic and a simultaneously picked up measured value of the second characteristic;
(d) comparing the tuples of characteristics of step (c) with a predetermined normal operating range of a multidimensional characteristic diagram which is defined at least by the first characteristic and the second characteristic; and
(e) storing a tuple of characteristics of step (c) and/or triggering an alarm signal if said tuple of characteristics from step (c) is outside the normal operating range.
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Accused Products
Abstract
The invention relates to a method of detecting external impacts in vehicle steering systems (12) which include a rotatable steering shaft (16) and a servomotor (22) for generating a steering assist torque, the method including the steps of: (a) continuously measuring a first characteristic; (b) continuously measuring a second characteristic; (c) forming tuples of characteristics at least from a measured value of the first characteristic and a simultaneously picked up measured value of the second characteristic; (d) comparing the tuples of characteristics of step (c) with a predetermined normal operating range (36) of a multidimensional characteristic diagram (34) which is defined at least by the first characteristic and the second characteristic; and (e) storing a tuple of characteristics of step (c) and/or triggering an alarm signal if this tuple of characteristics from step (c) is outside the normal operating range (36).
9 Citations
16 Claims
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1. A method of detecting external impacts in vehicle steering systems which include a rotatable steering shaft and a servomotor for generating a steering assist torque, the method comprising the steps of:
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(a) continuously measuring a first characteristic; (b) continuously measuring a second characteristic; (c) forming tuples of characteristics at least from a measured value of the first characteristic and a simultaneously picked up measured value of the second characteristic; (d) comparing the tuples of characteristics of step (c) with a predetermined normal operating range of a multidimensional characteristic diagram which is defined at least by the first characteristic and the second characteristic; and (e) storing a tuple of characteristics of step (c) and/or triggering an alarm signal if said tuple of characteristics from step (c) is outside the normal operating range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 16)
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12. A method of detecting external impacts in vehicle steering systems which include a servomotor for generating a steering assist torque comprising the steps of:
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establishing an output of the servomotor in a generator mode; and triggering a signal and/or storing a measured value when the output detected exceeds a predefined threshold value. - View Dependent Claims (13, 14)
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15. A method of detecting external impacts in vehicle steering systems which include a rotatable steering shaft and a servomotor for generating a steering assist torque, the method comprising the steps of:
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(a) continuously measuring a first characteristic; (b) continuously measuring a second characteristic; (c) forming tuples of characteristics at least from a measured value of the first characteristic and a simultaneously picked up measured value of the second characteristic; (d) comparing the tuples of characteristics of step (c) with a predetermined normal operating range of a multidimensional characteristic diagram which is defined at least by the first characteristic and the second characteristic; and (e) triggering an alarm signal if said tuple of characteristics from step (c) is outside the normal operating range.
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Specification