VEHICLE HEIGHT CONTROL APPARATUS USING DATA COMMUNICATION BETWEEN BRAKING CONTROLLER AND SUSPENSION CONTROLLER AND CONTROL METHOD THEREOF
First Claim
1. A vehicle height control apparatus, comprising:
- a suspension controller configured to control vehicle height;
a lateral acceleration sensor;
a braking controller configured to determine a road surface condition on the basis of a difference between a lateral acceleration measured by the lateral acceleration sensor and a lateral acceleration calculated using a vehicle speed value and a steering angle value, the braking controller determining vehicle height information to be reflected in the suspension controller on the basis of the measured lateral acceleration and a roll angle presumed on the basis of the determined road surface condition and the measured lateral acceleration; and
an interface unit performing data communication between the braking controller and the suspension controller.
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Accused Products
Abstract
A vehicle height control apparatus includes a suspension controller for controlling vehicle height, a lateral acceleration sensor, a braking controller determining a road surface condition on the basis of a difference between a lateral acceleration measured by the lateral acceleration sensor and a lateral acceleration calculated using a vehicle speed and a steering angle, the braking controller determining vehicle height information to be reflected in the suspension controller on the basis of the measured lateral acceleration and a roll angle presumed on the basis of the determined road surface condition and the measured lateral acceleration, and an interface unit performing data communication between the braking controller and the suspension controller.
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Citations
9 Claims
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1. A vehicle height control apparatus, comprising:
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a suspension controller configured to control vehicle height; a lateral acceleration sensor; a braking controller configured to determine a road surface condition on the basis of a difference between a lateral acceleration measured by the lateral acceleration sensor and a lateral acceleration calculated using a vehicle speed value and a steering angle value, the braking controller determining vehicle height information to be reflected in the suspension controller on the basis of the measured lateral acceleration and a roll angle presumed on the basis of the determined road surface condition and the measured lateral acceleration; and an interface unit performing data communication between the braking controller and the suspension controller. - View Dependent Claims (2)
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3. A vehicle height control apparatus, comprising:
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a suspension controller configured to control vehicle height; a longitudinal acceleration sensor; a braking controller configured to calculate an uphill or downhill slope using the longitudinal acceleration sensor, the braking controller determining vehicle height information to be reflected in the suspension controller in proportion to the calculated uphill or downhill slope; and an interface unit performing data communication between the braking controller and the suspension controller. - View Dependent Claims (4)
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5. A vehicle height control apparatus, comprising:
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a suspension controller configured to control vehicle height; a braking controller configured to determine whether a vehicle speed is changed or not, and accordingly, determining vehicle height information to be reflected in the suspension controller so that contact force between a wheel and the ground is increased if the number of slip revolutions of the wheel exceeds a predetermined number of revolutions and a slip state is maintained for a certain time when the vehicle speed is not changed; and an interface unit performing data communication between the braking controller and the suspension controller.
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6. A control method of a vehicle height control apparatus, which includes a braking controller, a suspension controller and an interface unit performing data communication between the braking controller and the suspension controller, the method comprising the steps of:
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calculating, by the braking controller, a lateral acceleration using a vehicle speed and a steering angle when a vehicle turns; determining, by the braking controller, a road surface condition on the basis of a difference between the calculated lateral acceleration and a lateral acceleration measured by a lateral acceleration sensor; presuming, by the braking controller, a roll angle on the basis of the determined road surface condition and the lateral acceleration measured by the lateral acceleration sensor; determining, by the braking controller, vehicle height information to be reflected in the suspension controller on the basis of the presumed roll angle and the lateral acceleration measured by the lateral acceleration sensor; and providing, by the braking controller, the determined vehicle height information to the suspension controller via the interface unit.
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7. A control method of a vehicle height control apparatus, which includes a braking controller, a suspension controller and an interface unit performing data communication between the braking controller and the suspension controller, the method comprising the steps of:
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calculating, by the braking controller, an uphill or downhill slope using a longitudinal acceleration sensor when a vehicle is driven on a road having a slope; determining, by the braking controller, vehicle height information to be reflected in the suspension controller in proportion to the calculated uphill or downhill slope; and providing, by the braking controller, the determined vehicle height information to the suspension controller via the interface unit.
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8. A control method of a vehicle height control apparatus, which includes a braking controller, a suspension controller and an interface unit performing data communication between the braking controller and the suspension controller, the method comprising the steps of:
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receiving a wheel speed from a wheel speed sensor when a vehicle wheel slips; calculating a vehicle speed and the number of slip revolutions of the wheel using the wheel speed; determining whether the calculated vehicle speed is changed or not; if the vehicle speed is not changed as a result of the vehicle speed change determining step, determining, by the braking controller, whether the calculated number of slip revolutions of the wheel exceeds a predetermined number of revolutions; if the number of slip revolutions of the wheel exceeds the predetermined number of revolutions as a result of the slip revolution determining step, determining, by the braking controller, vehicle height information to be reflected in the suspension controller to increase contact force between the wheel and the ground; and providing, by the braking controller, the determined vehicle height information to the suspension controller via the interface unit. - View Dependent Claims (9)
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Specification