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Motor vehicle level control circuit

  • US 4,105,216 A
  • Filed: 04/18/1977
  • Issued: 08/08/1978
  • Est. Priority Date: 11/25/1975
  • Status: Expired due to Term
First Claim
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1. A motor vehicle level control circuit for use with motor vehicle leveling systems of the type operative to level the sprung mass of the motor vehicle within a predetermined trim band in response to respective electrical signals indicating the sprung mass to be above and below the trim band comprising:

  • means for producing a first logic signal pair when the sprung mass is above the trim band and another second logic signal pair when the sprung mass is below the trim band;

    first circuit means responsive to said first logic signal pair for producing a sprung mass high signal;

    second circuit means responsive to said second logic signal pair for producing a sprung mass low signal;

    means responsive to said sprung mass high signal for effecting the lowering of said sprung mass;

    means responsive to said sprung mass low signal for effecting the raising of said sprung mass;

    third circuit means responsive to said sprung mass high signal for accumulating the time said sprung mass high signal is present and for inhibiting the production of said sprung mass high signal at the conclusion of a predetermined time period whereby said means responsive to said sprung mass high signal is disabled at the conclusion of said predetermined time period; and

    fourth circuit means responsive to said sprung mass low signal for accumulating the time said sprung mass low signal is present and for inhibiting the production of said sprung mass low signal at the conclusion of a predetermined time period whereby said means responsive to said sprung mass low signal is disabled at the conclusion of said predetermined time period.

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