Apparatus and method for controlling vehicle stability
AssigneeHyundai Motor Company
InventorsKyo Il Lee, Young Man Cho, Jin-Oh Hahn, Seung Han You, Seung Jin Yoo
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Abstract
An apparatus for controlling vehicle stability includes a virtual pressure calculator calculating a virtual brake pressure. In one embodiment, the virtual brake pressure is calculated based on a yaw rate signal input from a yaw rate sensor. In other embodiments, the virtual brake pressure is further calculated on the basis of signals input from a steering angle sensor, a lateral acceleration sensor, a vehicle speeds sensor, and a master brake pressure sensor. A method for controlling vehicle stability is also provided. The method and apparatus enhances stability and reliability during vehicle driving.
Claims10
An apparatus for controlling vehicle stability comprising:
- a yaw rate sensor detecting a yaw rate and outputting a corresponding yaw rate signal;
- a virtual pressure calculator calculating a virtual brake pressure for controlling respective wheels on the basis of a yaw rate signal input from the yaw rate sensor and signals input from a steering angle sensor, a lateral acceleration sensor, a vehicle speed sensor, and a master brake pressure sensor;
- an adder adding a target brake pressure and the calculated virtual brake pressure;
- a pressure controller outputting a PWM signal for controlling a brake pressure supplied to the respective wheels by analyzing a pressure value calculated by the adder and information of a steering angle, a lateral acceleration, and a vehicle speed;
- and
- an oil pressure controller controlling the brake pressure by calculating an actual brake pressure on the basis of the PWM signal transmitted from the pressure controller by utilizing a predetermined non-linear map, a linear model, and a disturbance compensating map.
A method for controlling vehicle stability comprising:
- detecting a yaw rate;
- calculating a virtual brake pressure on the basis of the detected yaw rate, a steering angle, a lateral acceleration, a vehicle speed, and a master brake pressure;
- calculating a difference between the virtual brake pressure and a target brake pressure;
- outputting a PWM signal for controlling an operating brake pressure of respective wheels of the vehicle on the basis of the difference, a steering angle, a lateral acceleration, and a vehicle speed;
- and
- controlling the operating brake pressure of the respective wheels of the vehicle by calculating an actual brake pressure for the respective wheels on the basis of the PWM signal by utilizing a predetermined non-linear map, a linear model, and a disturbance compensating map and by compensating for oil characteristics corresponding to an oil temperature change.
Dependencies are inferred from the claim text.