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Engine system and method for injector cut-out operation with improved exhaust heating

  • US 7,069,718 B2
  • Filed: 03/05/2004
  • Issued: 07/04/2006
  • Est. Priority Date: 06/04/2002
  • Status: Active Grant
First Claim
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1. A method for controlling an engine with at least a first set of cylinders and a second set of cylinders, the method comprising:

  • during an engine start, operating the second set of cylinders with an ignition timing more retarded than an ignition timing of said first set of cylinders,during engine operation, operating the first set of cylinders with injected fuel to carry out combustion and operating the second set of cylinders to induct air and without injected fuel;

    whereinduring said engine start, the second set of cylinders is operated with an ignition timing that is retarded such that the second set of cylinders produce substantially less torque per cylinder than produced by said first set of cylinders.

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