| 摘要 |
PURPOSE:To improve the operating stability of a car by detecting two or more- step running and road surface states from steering, brake, vertical oscillation acceleration, and high speed signals and varying the spring constant of a bush to the large side in a suspension for the car. CONSTITUTION:A vertical oscillation acceleration signal G is input to the OR circuit 9 of a logic circuit 8 through a bandpass filter 5, a comparator 6, and a delay circuit 7 together with a steering signal S and a brake signal B, processed, and output to an OR circuit 10. A high speed state signal V is input to the OR circuit 10 and processed together with the output of the OR circuit 9. Running and road surface states are combined together in five steps and discriminated, and solenoids 41 and 42 are controlled through timers 12 and 13 so as to increase the spring constant of a bush at times other than good road, straight drive, no-brake, and low and intermediate speeds. As a result of this structure, comfortableness to drive a car and its operating stability can be ensured and improved. |
