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COMBUSTION PHASING CONTROL IN SPARK-ASSISTED HCCI COMBUSTION MODE

  • US 20120118267A1
  • Filed: 11/16/2010
  • Published: 05/17/2012
  • Est. Priority Date: 11/16/2010
  • Status: Active Grant
First Claim
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1. Method for controlling combustion in a multi-cylinder spark-ignition direct-injection internal combustion engine, comprising:

  • determining a desired combustion phasing for maintaining acceptable combustion properties;

    monitoring combustion phasing of each cylinder;

    selecting a target combustion phasing corresponding to one of the cylinders having a most retarded combustion phasing;

    adjusting spark timing in each cylinder not having the most retarded combustion phasing to achieve the target combustion phasing to balance the combustion phasing in all the cylinders at the target combustion phasing; and

    adjusting an external EGR percentage to converge the balanced combustion phasing in all the cylinders toward the desired combustion phasing.

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