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Active vehicle suspension system

  • US 6,000,702 A
  • Filed: 10/20/1998
  • Issued: 12/14/1999
  • Est. Priority Date: 04/20/1996
  • Status: Expired due to Term
First Claim
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1. An active suspension system for a vehicle, comprising:

  • a plurality of supporting units, each of said supporting units having an actively lift-adjustable regulating unit and a passive spring arranged in series thereto;

    an automatic control for the regulating units;

    a path sensor for each supporting unit which generates a signal corresponding to a lifting position of the respective supporting unit; and

    an arrangement of acceleration sensors provided on a body of the vehicle which generate signals for body-side longitudinal and lateral accelerations and lifting movements,wherein control signals used for controlling the regulating units comprise a first proportion generated by signals of said acceleration sensors and a second proportion generated by signals of said path and acceleration sensors,the first proportion being determined by pitching, rolling and lifting movements of the vehicle body determined by the acceleration sensors, andthe second proportion being determined by a comparison of definable desired values for a position of the vehicle body relative to the ground with assigned actual values which are mathematically determined from the lifting positions of the supporting units and at least the vehicle body accelerations in the longitudinal and lateral directions.

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