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Vehicle suspension system

  • US 5,088,759 A
  • Filed: 05/14/1990
  • Issued: 02/18/1992
  • Est. Priority Date: 05/17/1989
  • Status: Expired due to Term
First Claim
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1. A vehicle suspension system comprising:

  • a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device,vehicle height detecting means for detecting a vehicle height displacement,vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, andcontrol means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied tot he cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device by increasing at least one of said vehicle height change rate gain coefficients when the vehicle is stopped and starts running.

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