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Control system for active suspension which distributes load according to lateral acceleration

  • US 5,088,762 A
  • Filed: 09/28/1990
  • Issued: 02/18/1992
  • Est. Priority Date: 09/29/1989
  • Status: Expired due to Fees
First Claim
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1. An active suspension system for an automotive vehicle, comprising:

  • suspension assemblies disposed between a vehicle body and suspension members which respectively support wheels rotatably, each of the suspension assemblies including fluid pressure means of adjustable pressure for active suspension control;

    a pressure circuit communicating with the fluid pressure means to supply pressurized fluid thereto;

    an acceleration sensor monitoring a lateral acceleration acting on the vehicle body to provide signals indicative thereof;

    pressure adjusting means responsive to control signals to adjust pressures of the pressurized fluid supplied to the fluid pressure means of said suspension assemblies respectively through said pressure circuit; and

    control means responsive to the signals from said acceleration sensor to provide corresponding control signals to said pressure adjusting means for controlling the pressures of pressurized fluid to the fluid pressure means to vary load distribution between left and right front wheels and between left and right rear wheels by predetermined ratios determined on the basis of the signals from said acceleration sensor, said control means including load distribution adjusting means providing gains for the control signals each variably dependent upon a frequency of the lateral acceleration monitored by said acceleration sensor to vary the ratios of load distribution such that the degree of load shift for the rear wheels is less than that of the front wheels.

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