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Efficiency enhancement to a laser ignition system

  • US 8,297,248 B2
  • Filed: 10/13/2011
  • Issued: 10/30/2012
  • Est. Priority Date: 09/08/2010
  • Status: Active Grant
First Claim
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1. A method for a laser ignition in an engine cylinder, comprising:

  • during an engine start, igniting an air/fuel mixture in the cylinder by focusing a laser at a first cylinder location; and

    heating the cylinder with laser energy by focusing the laser at a second cylinder location different from the first cylinder location when engine temperature is less than a threshold, the heating including generating laser pulses during an exhaust stroke of the cylinder.

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