Method and apparatus for controlling fuel reforming under...

Details Method and apparatus for controlling fuel reforming under... Method and apparatus for controlling fuel reforming under...

2008-03-10

2010-06-22

Wolfe, Jr., Willis R (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S299000, C123S090150, C123S568140, C123S679000, C701S104000, C701S109000

Reexamination Certificate

active

07742868

ABSTRACT:
A direct injection spark ignition multi-cylinder internal combustion engine operative in a controlled auto-ignition combustion mode includes a direct fuel injection system, a spark ignition system and a controllable engine valve system. The air/fuel ratio in the exhaust gas feedstream and an intake mass air flow are measured and an actual air/fuel ratio is calculated based upon the intake mass air flow and engine fueling. Magnitude of a negative valve overlap period between an exhaust valve closing and an intake valve opening is adjusted based upon the measured mass air flow. Timing of pre-injection fueling is adjusted during the negative valve overlap period based upon the measured air/fuel ratio.

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