Apparatus for actively controlling steer angle of front wheels of vehicle
AssigneeNissan Motor Co., Ltd.
InventorHiroshi Mouri
Life of this patent
Estimating the term…
Abstract
In an apparatus for actively controlling a steer angle of front wheels of a vehicle, a steering angle of a steering wheel is detected and then an active control amount for actively controlling the steer angle of the front wheels including a proportional term and a differential term is calculated. After only the differential term has been delayed, the steer angle of the front wheels is controlled in accordance with the active control amount. Since the differential component in the active control amount has been delayed, the steer angle of the front wheels is changed gradually, so that the variation in the steering force is suppressed. Therefore, the maneuverability and operating properties of the vehicle can be improved.
Claims5
An apparatus for controlling a steer angle of front wheels of a vehicle comprising:
- sensing means for detecting a steering wheel angle to derive a steering wheel angle signal;
- signal processing means for processing said steering wheel angle signal to derive an active control signal including at least a first order differential of said steering wheel angle signal, said first order differential being delayed by a delay time such that a variation of a steering force can be suppressed;
- and
- actuating means for steering the front wheels in accordance with said steering wheel angle signal as well as said active control signal
- wherein said signal processing means is constructed such that said delayed first order differential is obtained by sampling said steering wheel angle signal at a predetermined sampling period to derive sample values, and by deriving a difference between sample values obtained at different sampling timings which are separated by N times of the sampling period, wherein N is an integer larger than 1.
Dependencies are inferred from the claim text.