Torque distribution control apparatus for four wheel drive
First Claim
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1. A torque distribution control apparatus for a four wheel drive in which four wheels of a car are driven by engine outputs comprising:
- torque distribution change means for controlling a quantity of said engine outputs to be transmitted to the four wheels so as to change the driving torque distribution for the four wheels;
torque distribution control means for setting torque distribution ratios for the four wheels correspondingly to a lateral acceleration of the car and controlling the torque distribution change means on the basis of the torque distribution ratios;
a steering angle sensor for detecting a steering angle;
a car speed sensor for detecting a car speed;
a lateral acceleration sensor for detecting an actual lateral acceleration of the car;
lateral acceleration calculation means for calculating the lateral acceleration to occur on the car correspondingly to said steering angle and said car speed; and
lateral acceleration selection means for selecting either the actual lateral acceleration obtained by said lateral acceleration sensor or the calculated lateral acceleration obtained by said lateral acceleration calculation means in order to execute torque distribution control.
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Abstract
In the case where the driving torque distribution for four wheels of a car is controlled correspondingly to a lateral acceleration of the car, there is selected either an actual lateral acceleration of the car detected by a lateral acceleration sensor or a lateral acceleration calculated on the basis of a steering angle and a car speed, of which absolute value is smaller, in order to execute torque distribution control. Thus, the turning of the car can be enhanced.
43 Citations
7 Claims
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1. A torque distribution control apparatus for 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 controlling a quantity of said engine outputs to be transmitted to the four wheels so as to change the driving torque distribution for the four wheels; torque distribution control means for setting torque distribution ratios for the four wheels correspondingly to a lateral acceleration of the car and controlling the torque distribution change means on the basis of the torque distribution ratios; a steering angle sensor for detecting a steering angle; a car speed sensor for detecting a car speed; a lateral acceleration sensor for detecting an actual lateral acceleration of the car; lateral acceleration calculation means for calculating the lateral acceleration to occur on the car correspondingly to said steering angle and said car speed; and lateral acceleration selection means for selecting either the actual lateral acceleration obtained by said lateral acceleration sensor or the calculated lateral acceleration obtained by said lateral acceleration calculation means in order to execute torque distribution control. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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