×

Automotive vehicle suspension control system

  • US 5,691,899 A
  • Filed: 10/10/1995
  • Issued: 11/25/1997
  • Est. Priority Date: 10/14/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A suspension control system for an automotive vehicle, comprising:

  • at least one shock absorber provided between sprung and unsprung masses of the vehicle to provide a variable damping force characteristic;

    first sensor means for sensing a behavior of the vehicle and producing a first sensor signal indicative of a sensed vehicle behavior;

    second sensor means for sensing a vehicle steering angle and producing a second sensor signal indicative of a sensed vehicle steering angle;

    a low pass filter for converting the second sensor signal into a noise removed steering angle indicative signal;

    a control unit operable in a normal control mode for controlling the shock absorber based on the first sensor signal to provide an optimum damping force characteristic and in a roll control mode for controlling the shock absorber based on the noise removed vehicle steering angle indicative signal to provide a damping force greater than that provided in the normal control mode, the control unit including means for detecting a peak value of the noise removed steering angle indicative signal, means for operating the control unit in the roll control mode when the noise removed steering angle indicative signal exceeds a predetermined first threshold value, means for setting a second threshold value in direct proportion with the detected peak value, and means for making a change from the roll control mode to the normal control mode a predetermined time after the noise removed steering angle indicative signal decreases below the second threshold value.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×