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Engine valve actuation system and method

  • US 6,807,929 B2
  • Filed: 05/14/2002
  • Issued: 10/26/2004
  • Est. Priority Date: 05/14/2002
  • Status: Active Grant
First Claim
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1. A method of controlling an engine valve, comprising:

  • operating a cam assembly to move at least one intake valve between a closed position and an open position;

    transmitting a signal to engage a piston of an actuator with the at least one intake valve to alter movement of the valve with respect to said cam assembly;

    monitoring a parameter that is affected by the operation of the actuator; and

    generating a warning signal when the monitored parameter is indicative of a failure of the actuator piston to engage the at least one intake valve.

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