Patent ID: 6067491
Filing Date: 2000-05-23
Classification: B60G,B62D

Abstract:
An apparatus for a cab over type truck, comprising:at least a pair of longitudinally spaced apart positioned shock absorbers, each shock absorber being interposed between a vehicle cab of the truck and a vehicle chassis of the truck and having a damping force characteristic varying member arranged so as to enable a variation in the damping force characteristic of its corresponding shock absorber in response to an input control signal;a vehicle cab behavior detector for detecting a behavior of the cab and for developing a signal indicative of the behavior of the vehicle cab;a basic damping force characteristic controller for developing the control signal to be supplied to the damping force characteristic varying member of each corresponding shock absorber to control the damping force characteristic of the corresponding shock absorber on the basis of a reference control rule which enables optimally a suppression of the vehicle cab behavior under a predetermined vehicle reference condition according to the vehicle cab behavior indicative signal;a pair of longitudinally spaced apart positioned vehicle cab vibration condition detectors for detecting vibration conditions on at least the longitudinally spaced apart positions of the vehicle cab based on the vehicle cab behavior indicative signal;a comparison value determinator for determining a comparison value which is a result of a level comparison between the level of the cab longitudinal direction vibration conditions detected by the pair of longitudinally spaced apart positioned vehicle cab vibration condition detectors of the vehicle cab and that under a reference condition of the cab over type truck; anda corrective controller for developing a correction coefficient for the control signal to be supplied to the damping force characteristic varying member of each corresponding shock absorber so as to correct the basic damping force characteristic control for each shock absorber according to the comparison value determined by the comparison value determinator.