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SKIP FIRE ENGINE CONTROL

  • US 20110030657A1
  • Filed: 07/09/2010
  • Published: 02/10/2011
  • Est. Priority Date: 07/10/2009
  • Status: Active Grant
First Claim
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1. A method of controlling the operation of an internal combustion engine in a skip fire variable displacement mode, the engine including a plurality of working chambers, each working chamber being generally arranged to operate in a succession of working cycles, the method comprising:

  • determining a firing pattern that includes skipped working cycles and active working cycles, wherein at any given time, the firing pattern is not fixed but the active working cycles are selected to favor the firing of working chambers that have recently been fired at least in part to reduce wall wetting losses; and

    delivering fuel to the working cycles in accordance with the determined firing pattern, wherein fuel is not affirmatively delivered to the working chambers during skipped working cycles and wherein fuel is affirmatively delivered to the working chambers during the active working cycles.

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