Four wheel steering system for vehicle - uses microprocessor control for different rear steering characteristics

摘要

The vehicle has normal front wheel steering controlled by the steering wheel (1) and the steering servo (6) and rear wheel steering controlled by a microprocessor (18). The rear wheels are steered in relation to the steering wheel setting and the vehicle speed- and loading. A programmed set of rear wheels steering characteristics are adressed by the processor and the optimum characteristics is selected by a control circuit (36). The processor also controls the servo steering effect on the rear-and front wheels. If servo steering is applied to the rear wheels, when conditions require, then the front servo effect is correspondingly reduced. ADVANTAGE - Improved control, adaptable to different road/driving conditions.