COLD START STRATEGY AND SYSTEM FOR GASOLINE DIRECT INJECTION COMPRESSION IGNITION ENGINE

  • US 20150114339A1
  • Filed: 10/31/2013
  • Published: 04/30/2015
  • Est. Priority Date: 10/31/2013
  • Status: Abandoned Application
First Claim
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1. A method for starting a compression ignition engine, the engine having at least one cylinder with a reciprocating piston located therein, an intake valve configured to control the intake of air to an intake port of the cylinder and an exhaust valve configured to control the expulsion of gas from an exhaust port of the cylinder;

  • the method comprising the steps of;

    cranking the engine;

    conditioning intake air provided at the intake port of the cylinder to raise the temperature of air in the cylinder;

    controlling a valve timing of at least one of the intake valve and the exhaust valve to allow the piston to compress the air within the cylinder to a pressure above the pressure of the intake air provided at the intake port of the cylinder, thereby increasing the temperature of the air within the cylinder; and

    injecting fuel into the cylinder when the air within the cylinder has been heated to a temperature sufficient to support compression ignition of a gasoline and air mixture within the cylinder.

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