| 摘要 |
PURPOSE:To maintain constant steering characteristics at all times regardless of the load condition by outputting a steering angle drive signal based on changes of the acceleration and load during the turn of a car. CONSTITUTION:A control unit 26 is fed with outputs of various sensors such as load sensors 18-24, a car speed sensor 28, and an acceleration sensor 30 detecting the acceleration due to the turn of a car, and it outputs a drive signal for steering rear wheels 14, 16. A drive unit steering the rear wheels 14, 16 has a servo amplifier 32, an electric hydraulic servo valve 34, a hydraulic pump 36, a hydraulic cylinder 38, connecting rods 40, 42, knuckle arms 44, 46, a displacement sensor 48, and a drive signal from the control unit 26 is fed to the servo amplifier 32. During the car stop when the number of occupants and the load condition are changed, a proportional constant alpha required during the travel is calculated, the proportional constant alpha is fixed during the travel, a rear wheel steering angle suitable for the load condition is calculated when the detection output of the acceleration sensor 30 is generated, and the rear wheels 14, 16 are steered in response to this steering angle. |
