Safety system and method for a vehicle
First Claim
1. A method for activating an advanced warning system in response to a potential crash condition of a vehicle, the method comprising:
- receiving a roll rate signal from a rotational sensor, the roll rate signal being indicative of a roll rate the vehicle overturns in a lateral direction;
determining a roll angle using the roll rate signal, the roll angle being indicative of the angle the vehicle overturns in a lateral direction;
determining a first and second roll-over value indicative of the relationship between the roll rate signal and the roll angle; and
adjusting a roll warning threshold using the first and second roll-over values, the roll warning threshold being adjusted in response to the vehicle experiencing at least a potential roll condition; and
activating a safety system when the roll rate and roll angle exceed the roll warning threshold, wherein the roll warning threshold is determined using a functional relationship between the roll rate and the roll angle.
1 Assignment
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Accused Products
Abstract
A system and method for activating a safety system when a vehicle may be involved in a spin, roll, and/or a spin-to-roll condition. The system and method include determining a side slip angle of the vehicle using the arctangent of the ratio of a lateral and longitudinal velocity. The system and method also include receiving a roll rate signal and determining a roll angle using the roll rate signal. The system and method also include determining a roll warning threshold that is a function of a relationship between the roll rate signal and the roll angle. Lastly, the system and method include activating the safety system when a side slip angle threshold and/or the roll warning threshold are exceeded.
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Citations
15 Claims
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1. A method for activating an advanced warning system in response to a potential crash condition of a vehicle, the method comprising:
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receiving a roll rate signal from a rotational sensor, the roll rate signal being indicative of a roll rate the vehicle overturns in a lateral direction; determining a roll angle using the roll rate signal, the roll angle being indicative of the angle the vehicle overturns in a lateral direction; determining a first and second roll-over value indicative of the relationship between the roll rate signal and the roll angle; and adjusting a roll warning threshold using the first and second roll-over values, the roll warning threshold being adjusted in response to the vehicle experiencing at least a potential roll condition; and activating a safety system when the roll rate and roll angle exceed the roll warning threshold, wherein the roll warning threshold is determined using a functional relationship between the roll rate and the roll angle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for activating a safety system in response to a potential crash condition of a vehicle, the method comprising:
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receiving a roll rate signal from a rotational sensor, the roll rate signal being indicative of a roll rate the vehicle overturns in a lateral direction; determining a longitudinal and lateral velocity of the vehicle; determining a side slip angle of the vehicle using the arctangent of the ratio between the lateral and longitudinal velocities; determining a roll angle using the roll rate signal, the roll angle being indicative of the angle the vehicle overturns in a lateral direction; adjusting a roll warning threshold using the first and second roll-over values, the roll warning threshold being adjusted in response to the vehicle experiencing a potential roll condition; activating a safety system in response to the side slip angle exceeding a side slip angle threshold and the roll rate and roll angle exceeding the roll warning threshold. - View Dependent Claims (9, 10, 11)
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12. A system for activating a safety system in response to a potential crash condition of a vehicle, the system comprising:
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a rotational sensor configured to generate a roll rate signal, the roll rate signal being indicative of a roll rate the vehicle overturns in a lateral direction; and a controller configured to; determine a roll angle using the roll rate signal, the roll angle being indicative of the angle the vehicle overturns in a lateral direction; determine a first and second roll-over value indicative of the relationship between the roll rate signal and the roll angle; adjust a roll warning threshold using the first and second roll-over values, the roll warning threshold being adjusted in response to the vehicle experiencing a potential roll condition activate a safety system when the roll rate and roll angle exceed the roll warning threshold. - View Dependent Claims (13, 14, 15)
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Specification