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Method for controlling fuel injection in a compression ignition engine

  • US 20070246004A1
  • Filed: 04/24/2007
  • Published: 10/25/2007
  • Est. Priority Date: 04/24/2006
  • Status: Active Grant
First Claim
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1. Method for controlling operation of an internal combustion engine operating lean of stoichiometry, said engine comprising a multi-cylinder direct-injection engine, the engine operative in repetitive cycles each cycle comprising intake, compression, expansion, and exhaust strokes, the method comprising:

  • adapting a plurality of fuel injectors to directly inject a first and a second mass of fuel into each cylinder during each cycle;

    adapting a plurality of pressure sensing devices to monitor in-cylinder pressure during ongoing operation;

    injecting the first mass of fuel into one of the cylinders;

    determining the in-cylinder pressure immediately subsequent to injecting the first mass of fuel; and

    adjusting the first mass of fuel based upon the determined in-cylinder pressure.

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