Method and apparatus for determining a reference vehicle velocity and a rear wheel speed in a vehicle having three speed sensors
First Claim
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1. A method for controlling a safety system of a vehicle, said method comprising the steps of:
- determining a reference velocity from a first front wheel speed signal, a second front wheel speed signal and a drive speed signal in which said drive speed signal comprises one of an axle speed signal or a driveshaft speed signal;
calculating a first rear wheel speed value and a second rear wheel speed value from said reference velocity, a slip effect, and a yaw signal; and
controlling said safety system in response to said first rear wheel speed value and said second rear wheel speed value.
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Abstract
The method for controlling a safety system (102-108) of a vehicle (10) determines a reference velocity from a first front wheel sensor (20A) and a second front wheel speed signal from a second front wheel sensor (20B). An axle speed sensor (20C) may be used to determine an axle speed signal. A first rear speed signal and a second rear speed signal are determined from the reference velocity, a slip effect and a yaw signal. The yaw signal may be determined from a yaw rate sensor (28). Safety system (102-108) may be controlled in response to the first rear wheel speed signal and the second rear wheel speed signal.
21 Citations
21 Claims
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1. A method for controlling a safety system of a vehicle, said method comprising the steps of:
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determining a reference velocity from a first front wheel speed signal, a second front wheel speed signal and a drive speed signal in which said drive speed signal comprises one of an axle speed signal or a driveshaft speed signal; calculating a first rear wheel speed value and a second rear wheel speed value from said reference velocity, a slip effect, and a yaw signal; and controlling said safety system in response to said first rear wheel speed value and said second rear wheel speed value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A vehicle comprising:
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a safety system; a first front wheel speed sensor generating a first front wheel speed signal; a second front wheel speed sensor generating a second front wheel speed signal; a rear axle speed sensor generating a rear axle speed signal; a yaw rate sensor generating a yaw rate signal; and a controller coupled to the first front wheel speed sensor, the second front heel speed sensor and the rear axle speed sensor, said controller determining a reference velocity from the first front wheel speed signal, a second front wheel speed signal and the rear axle speed signal, said controller determining a first rear wheel speed signal and a second rear wheel speed signal from the reference velocity, a slip effect and the yaw signal, said controller controlling the safety system in response to the first rear wheel speed signal and the second rear wheel speed signal.
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Specification