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Skip-cycle strategies for four cycle engine

  • US 5,377,631 A
  • Filed: 09/20/1993
  • Issued: 01/03/1995
  • Est. Priority Date: 09/20/1993
  • Status: Expired due to Term
First Claim
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1. In an automotive type four cycle multicylinder engine having intake and exhaust valves for each and every cylinder, the improvement comprising valve control means including means for operating the engine in a variety of skip cycle strategies by deactivating, in inverse proportion to the change in the load level, one or more of the cylinders during engine operation, the means further including means for converting the stroke of the piston of a deactivated cylinder from its set stroke in the four cycles of engine operation to an earlier stroke in the cycle to assure the sequential firing of each of the cylinders all within a predetermined limited number of revolutions of the engine crankshaft defined by one complete skip cycle sequence for the particular load level.

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