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Multistage fuel-injection internal combustion engine

  • US 20070074702A1
  • Filed: 09/14/2006
  • Published: 04/05/2007
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A multi-stage fuel-injection internal combustion engine comprising:

  • a fuel injection system enabling at least one sub-injection in addition to main injection;

    a variable valve actuation control system capable of changing intake valve closure timing or exhaust valve open timing; and

    a control unit being responsive to operating conditions of the engine, for executing cooperative control of sub-injection timing responsively to either one of the intake valve closure timing and the exhaust valve open timing.

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