Side collision plausibility with lateral velocity
First Claim
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1. A method of discerning a lateral impact of a vehicle comprising the steps of:
- a) measuring a lateral velocity; and
b) measuring vehicle acceleration;
c) maintaining a deployment threshold acceleration value at a higher value responsive to a measured lateral velocity that is not indicative of lateral movement of the vehicle, when the measured vehicle acceleration is indicative of a lateral impact, wherein the higher value is determined to prevent deployment due to static abuse of the vehicle; and
d) lowering the deployment threshold acceleration value responsive to a measured lateral velocity indicative of lateral movement of the vehicle.
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Abstract
The method and system of this invention discriminates between a lateral collision and a static non-collision event by measuring lateral velocity of the vehicle and adjusting a threshold value causing occupant restraint system actuation according to the measured lateral velocity. The threshold value is decreased in response to an increase in lateral velocity and increased or maintained at a higher value when lateral velocity is minimal to prevent actuation caused by a non-crash event such as a door slam.
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Citations
14 Claims
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1. A method of discerning a lateral impact of a vehicle comprising the steps of:
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a) measuring a lateral velocity; and b) measuring vehicle acceleration; c) maintaining a deployment threshold acceleration value at a higher value responsive to a measured lateral velocity that is not indicative of lateral movement of the vehicle, when the measured vehicle acceleration is indicative of a lateral impact, wherein the higher value is determined to prevent deployment due to static abuse of the vehicle; and d) lowering the deployment threshold acceleration value responsive to a measured lateral velocity indicative of lateral movement of the vehicle. - View Dependent Claims (2, 3, 4, 13)
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5. A system for verifying plausibility of a sensor measurement comprising:
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a lateral movement sensor for measuring lateral velocity; an acceleration sensor for measuring vehicle movement; and at least one satellite acceleration sensor measuring a characteristic indicative of a lateral collision, wherein a lateral collision is determined to be plausible responsive to the lateral movement sensor measuring lateral velocity above a threshold value that is indicative of vehicle movement and acceleration is measured by one of the acceleration sensor and the at least one satellite acceleration sensors above a deployment threshold acceleration value, wherein a deployment threshold acceleration value is maintained at a high value responsive to the measured lateral velocity indicating that an measured acceleration value is indicative of static abuse instead of a potential lateral collision. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 14)
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Specification