Vehicle yaw reduction based upon right and left vehicle wheel acceleration differences and use of brake control
First Claim
1. A yaw moment reducing device, comprising:
- wheel speed sensors for detecting a speed of a right wheel and a left wheel;
acceleration calculation means for calculating an acceleration of the right wheel and the left wheel based on the speed of the right and left wheels;
determining means for determining a difference in acceleration between the right and left wheels;
judging means for judging a split road having different frictional characteristics based on the difference in acceleration between the right and left wheels;
braking control means for controlling the braking force applied to the right and left wheels, said braking control means including a yaw control means for reducing the yaw rate when the wheels experience the split road; and
brake pressure modulating means for modulating brake pressure supplied to the right and left wheels.
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Accused Products
Abstract
The yaw moment reducing device comprises wheel speed sensors for detecting the speeds of the right and left wheels, an acceleration calculation device for calculating accelerations of the right and left wheels based on the speed of the right and left wheels, a substraction device for subtracting the difference in accelerations between the right and left wheels, a braking control device for controlling the braking force based on the difference of the accelerations, and a brake pressure modulating device for modulating the brake pressure which is supplied to each wheel. The wheel speeds of each wheel are detected by the wheel speed sensors. The acceleration calculation device calculates the accelerations of each wheel while the substraction device provides the difference in accelerations between the right and left wheels. The yaw moment is in response to the difference of the acceleration between the right and left wheels. In other words, the yaw moment can be presumed by the difference of the acceleration between the right and left wheels. The brake pressure modulating device modulates the brake pressure which is supplied to each wheel based on the calculation result of the braking control devices. Thus, the yaw moment can be controlled.
15 Citations
7 Claims
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1. A yaw moment reducing device, comprising:
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wheel speed sensors for detecting a speed of a right wheel and a left wheel; acceleration calculation means for calculating an acceleration of the right wheel and the left wheel based on the speed of the right and left wheels; determining means for determining a difference in acceleration between the right and left wheels; judging means for judging a split road having different frictional characteristics based on the difference in acceleration between the right and left wheels; braking control means for controlling the braking force applied to the right and left wheels, said braking control means including a yaw control means for reducing the yaw rate when the wheels experience the split road; and brake pressure modulating means for modulating brake pressure supplied to the right and left wheels. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification