Torque distribution control apparatus for four wheel drive
First Claim
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1. A torque distribution control apparatus of a four wheel drive in which four wheels of a car are driven by engine outputs, comprising;
- torque distribution change means for adjusting a quantity of the engine outputs to be transmitted to the four wheels so as to change driving torque distribution between right and left wheels,a steering angle sensor for detecting a steering angle,a car speed sensor for detecting a car speed,a yaw rate sensor for detecting an actual yaw rate of the car, andtorque distribution control means having a yaw rate setting section for setting a target yaw rate on the basis of the steering angle and car speed, and a lateral distribution ratio setting section for setting the torque distribution ratio between the right and left wheels such that the actual yaw rate corresponds to the target yaw rate and controlling the torque distribution change means on the basis of the distribution ratio thus set.
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Abstract
The torque distribution for four wheels is controlled correspondingly to the turning state of a car. In this case, a target yaw rate is determined on the basis of a steering angle and a car speed so that the torque distribution ratio of right and left wheels is set. Consequently, the turning of the car can be improved. In addition, a quantity of drivers'"'"' steering can be prevented from being excessively increased during turning.
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Citations
17 Claims
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1. A torque distribution control apparatus of a four wheel drive in which four wheels of a car are driven by engine outputs, comprising;
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torque distribution change means for adjusting a quantity of the engine outputs to be transmitted to the four wheels so as to change driving torque distribution between right and left wheels, a steering angle sensor for detecting a steering angle, a car speed sensor for detecting a car speed, a yaw rate sensor for detecting an actual yaw rate of the car, and torque distribution control means having a yaw rate setting section for setting a target yaw rate on the basis of the steering angle and car speed, and a lateral distribution ratio setting section for setting the torque distribution ratio between the right and left wheels such that the actual yaw rate corresponds to the target yaw rate and controlling the torque distribution change means on the basis of the distribution ratio thus set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A torque distribution control apparatus comprising;
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torque distribution change means for adjusting a quantity of the engine outputs to be transmitted to right and left wheels so as to change driving torque distribution between said wheels, a steering angle sensor for detecting a steering angle, a car speed sensor for detecting a car speed, a yaw rate sensor for detecting an actual yaw rate of the car, and torque distribution control means having a yaw rate setting section for setting a target yaw rate on the basis of the steering angle and car speed, and a lateral distribution ratio setting section for setting the torque distribution ratio between the right and left wheels such that the actual yaw rate corresponds to the target yaw rate and controlling the torque distribution change means on the basis of the distribution ratio thus set.
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17. A torque distribution control apparatus of a four wheel drive in which each wheel of a car is braked by a respective brake comprising;
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torque distribution change means for adjusting each respective brake so as to change driving torque distribution between right and left wheels, a steering angle sensor for detecting a steering angle, a car speed sensor for detecting a car speed, a yaw rate sensor for detecting an actual yaw rate of the car, and torque distribution control means having a yaw rate setting section for setting a target yaw rate on the basis of the steering angle and car speed, and a lateral distribution ratio setting section for setting the torque distribution ratio between the right and left wheels such that the actual yaw rate corresponds to the target yaw rate and controlling the torque distribution change means on the basis of the distribution ratio thus set.
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Specification