| 摘要 |
PURPOSE:To reduce vibration of a car body and to prevent a truck, when it applies a brake, from sinking, by setting damping force of a suspension cylinder smaller, when the truck is empty, and larger, when the truck is loaded, while large increasing the damping force respectively when the truck applies the brake in a preset speed or more and when the truck rapidly steers in a high speed in a loading condition. CONSTITUTION:A CPU 54 inputs respectively cylinder pressures P1-P4 from pressure sensors 20 of a suspension cylinder and a steering angle, brake signal and a car speed from a steering sensor 9, brake sensor 10 and a car speed sensor 55. The CPU 54 decides from its input signals for whether a truck is empty or loaded. And actuating the first solenoid 481- third solenoid 501, damping force is set smaller, when the truck is empty, while larger when the truck is loaded. While the damping force, despite that the truck is empty or loaded, is large changed when the truck applies a brake in a preset car speed or more. Further the damping force is controlled so as to still larger change when the truck is loaded rapidly steering in a high speed. By this constitution, the truck is prevented from vibrating and from sinking when the brake is applied. |
