Speed and severity trigger for an active device of a vehicle
First Claim
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1. A method of determining a category of action of an active device of a vehicle, the method comprising:
- measuring a vehicle parameter indicative of a change of vehicle state;
determining a rate of change of said vehicle parameter;
modifying said vehicle parameter to a modified vehicle parameter by reference to said rate of change, wherein said modified vehicle parameter is advanced in time with respect to said measured vehicle parameter;
applying a threshold to said modified vehicle parameter;
determining a severity of said vehicle parameter in dependence on said threshold;
determining the category of action for the active device of the vehicle according to said severity in response to said modified vehicle parameter reaching said threshold, wherein determining the category of action comprises determining a speed of actuation of the active device from a plurality of actuation speeds in dependence on the modified vehicle parameter when the threshold is reached; and
triggering said active device according to said category of action in dependence on said modified vehicle parameter reaching said threshold.
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Abstract
A method of determining the category of action of an active device of a vehicle comprises repeatedly measuring a vehicle parameter indicative of a change of vehicle state, determining a rate of change of the vehicle parameter and determining a modified vehicle parameter by reference to the rate of change. A threshold is applied to the modified vehicle parameter and a trigger signal is generated for an active device of the vehicle in response to the threshold being reached and in accordance with a severity of the vehicle parameter, which may be vehicle speed related.
37 Citations
19 Claims
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1. A method of determining a category of action of an active device of a vehicle, the method comprising:
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measuring a vehicle parameter indicative of a change of vehicle state; determining a rate of change of said vehicle parameter; modifying said vehicle parameter to a modified vehicle parameter by reference to said rate of change, wherein said modified vehicle parameter is advanced in time with respect to said measured vehicle parameter; applying a threshold to said modified vehicle parameter; determining a severity of said vehicle parameter in dependence on said threshold; determining the category of action for the active device of the vehicle according to said severity in response to said modified vehicle parameter reaching said threshold, wherein determining the category of action comprises determining a speed of actuation of the active device from a plurality of actuation speeds in dependence on the modified vehicle parameter when the threshold is reached; and triggering said active device according to said category of action in dependence on said modified vehicle parameter reaching said threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for determining a category of action of an active device of a vehicle, said system comprising an electronic control unit that is adapted to:
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measure a vehicle parameter indicative of a change of vehicle state; determine a rate of change of said vehicle parameter; modify said vehicle parameter to a modified vehicle parameter by reference to said rate of change, wherein said modified vehicle parameter is advanced in time with respect to said measured vehicle parameter; apply a threshold to said modified vehicle parameter; determine a severity of said vehicle parameter in dependence on said threshold; determine the category of action for the active device of the vehicle according to said severity in response to said modified vehicle parameter reaching said threshold, wherein determining the category of action comprises determining a speed of actuation of the active device from a plurality of actuation speeds in dependence on the modified vehicle parameter when the threshold is reached; and trigger said active device according to said category of action in dependence on said modified vehicle parameter reaching said threshold.
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19. A vehicle comprising a system for determining a category of action of an active device of the vehicle, said system comprising an electronic control unit that is adapted to:
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measure a vehicle parameter indicative of a change of vehicle state; determine a rate of change of said vehicle parameter; modify said vehicle parameter to a modified vehicle parameter by reference to said rate of change, wherein said modified vehicle parameter is advanced in time with respect to said measured vehicle parameter; apply a threshold to said modified vehicle parameter; determine a severity of said vehicle parameter in dependence on said threshold; determine the category of action for the active device of the vehicle according to said severity in response to said modified vehicle parameter reaching said threshold, wherein determining the category of action comprises determining a speed of actuation of the active device from a plurality of actuation speeds in dependence on the modified vehicle parameter when the threshold is reached; and trigger said active device according to said category of action in dependence on said modified vehicle parameter reaching said threshold.
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Specification