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Level regulator for automotive vehicles

  • US 4,185,845 A
  • Filed: 04/12/1978
  • Issued: 01/29/1980
  • Est. Priority Date: 04/14/1977
  • Status: Expired due to Term
First Claim
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1. In a motor vehicle having an axle (10) and a vehicle body, level controllable spring means intercoupled between said body and said axle for raising and lowering said body with respect to said axle upon, respectively, pressure increase and pressure decrease in said spring means, level regulator means cooperating with said spring means for increasing and reducing the pressure therein in response to a first and second activating signal, respectively,means (16, 17) continuously furnishing an actual level signal indicative of the actual level of said body of said vehicle;

  • a regulating system comprisingerror signal furnishing means (49, 51;

    49,

         40) continuously furnishing an error signal indicative of the magnitude and direction of said actual level of said body of said motor vehicle relative to a reference level;

    delay means (24) connected to said error signal furnishing means, for furnishing a delayed error signal with a predetermined delay time interval following receipt of said error signal;

    and activating signal furnishing means (20, 23, 25,

         26) for furnishing said first and second activating signal in response to a delayed error signal indicative of a required raising and lowering of said body of said vehicle, respectively, and for terminating the furnishing of said activating signals substantially immediately upon receipt of a zero error signal indicative of an actual level equal to said reference level, said activating signal furnishing means comprising switch means (20,

         22) for furnishing said activating signal when in a first state and blocking said activating signal when in a second state respectively,and connecting means for interconnecting said switch means between said error signal furnishing means and said delay means in such a manner that said switch means is switched from said second to said first state only in response to said delayed error signal and from said first to said second state when said error signal is indicative of zero error.

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