Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2007-04-24
2008-08-26
Vo, Hieu T. (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C701S114000, C123S299000, C123S435000, C073S118040
Reexamination Certificate
active
07418336
ABSTRACT:
The invention comprises a method to operate a direct-injection engine operative at various air/fuel ratios. The method comprises monitoring in-cylinder pressure, along with a corresponding engine crank position to periodically to determine instantaneous in-cylinder pressure states corresponding to the engine crank position during compression and expansion. Pressure ratios are determined based upon the instantaneous in-cylinder pressure states. A combustion heat release is determined based upon the pressure ratios. An aspect of the invention comprises extending the operation to diesel, diesel premixed and to HCCI engines.
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Sellnau,M;Cyl. Pressure-Based Engine Control using Pressure Ratio Management;SAE 2000-01-0932; 2000;Soc.Auto.Engrg; Warrendale, PA, USA.
Battiston Paul Anthony
Gangopadhyay Anupam
Matekunas Frederic Anton
Szymkowicz Patrick G.
GM Global Technology Operations Inc.
Vo Hieu T.
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