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Electronic controls for compression release engine brakes

  • US 5,967,115 A
  • Filed: 02/11/1998
  • Issued: 10/19/1999
  • Est. Priority Date: 10/07/1994
  • Status: Expired due to Term
First Claim
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1. A method of controlling a means for selectively actuating a valve, said valve providing communication between an internal combustion engine exhaust manifold and a cylinder, so that a desired predetermined compression release valve event may be achieved, the method comprising the steps of:

  • sensing, during engine braking, one or more engine parameters selected from the group consisting of;

    a cylinder temperature, an exhaust manifold pressure, and the pressure of a hydraulic source in communication with said means for selectively actuating the valve;

    determining, for an engine exhibiting the one or more of said sensed engine parameters, one or more desired valve event parameters selected from the group consisting of;

    a valve opening time, a valve closing time, and a valve lift; and

    actuating said valve in accordance with said one or more valve event parameters.

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