Method and apparatus for controlling a homogeneous charge compression ignition engine
AssigneeGM Global Technology Operations LLC
InventorsJun-Mo Kang, Chen-Fang Chang, Man-Feng Chang, Nicole Wermuth
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Abstract
The invention comprises a method for controlling operation of a homogeneous charge combustion ignition engine operating in an auto-ignition mode. The method comprises determining a desired combustion phasing; and, controlling a mass flowrate of externally recirculated exhaust gas based upon an actual combustion phasing. A closed-loop control scheme is executed to control the mass flowrate of externally recirculated exhaust gas based upon a difference between the actual and the desired combustion phasing.
Claims19
Article of manufacture, comprising a storage medium containing a machine-executable program operative to control a homogeneous charge combustion ignition engine selectively operative in an auto-ignition mode and having an EGR valve operative to externally recirculate exhaust gas to an engine intake, the program comprising:
- code to operate the engine in the auto-ignition mode;
- code to determine a desired combustion phasing;
- and,
- code to control the EOR valve to achieve a mass flowrate of externally recirculated exhaust gas based upon an actual combustion phasing and the desired combustion phasing.
Method for controlling combustion phasing of a homogeneous charge combustion ignition engine operating in an auto-ignition mode under varying conditions of fuel octane and ambient environment, comprising:
- monitoring the combustion phasing and engine air-fuel ratio;
- controlling a mass flowrate of externally recirculated exhaust gas based upon the combustion phasing and the engine air-fuel ratio.
Method for controlling operation of a homogeneous charge combustion ignition engine operating in an auto-ignition mode, comprising:
- determining a desired combustion phasing;
- and,
- controlling a mass flowrate of externally recirculated exhaust gas based upon an actual combustion phasing and the desired combustion phasing.
Dependencies are inferred from the claim text.