Steering control for all-wheel drive vehicle - has speed sensors on both axles and corrected steering when speed differs on axles

摘要

The vehicle has all wheel drive and has the rear wheels steered in relation to the front wheel steering and the vehicle speed. Separate speed sensors for the front- and rear axles provide speed signals to the processor control (6). If the speed difference between the axles lies inside a programmed range then the processor operates on the rear axle speed. If the speed difference is outside this range then the processor operates on the higher of the two signals. The programmed range has a ratio range of 0.7 to 1.3. The additional control mode only operates if the speed difference is maintained for preset time intervals. A simple addition to the four wheel steering thus provides an active steering control. ADVANTAGE - Improved control, improved stability and safety.