System and Methods for Improved Efficiency Compression Ignition Internal Combustion Engine Control
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United States of America Patent
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Issued Date -
Feb 23, 2012
app pub date -
Aug 18, 2011
filing date -
Aug 20, 2010
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a compression ignition engine control system and methods for improving fuel efficiency. The system includes a fuel processor which receives instructions for a desired engine output and current operating conditions. The fuel processor generates fueling instructions for a plurality of cylinders. The fueling instructions include a low power skip fire mode of operation and a high power mode of operation. The instructions substantially regulate fuel delivery into to a first group of cylinders at or near optimal efficiency fuel levels during each of their respective working cycles. Likewise, the instructions may either substantially disable fuel injection into to a second grouping of cylinders or regulate fuel injection into to the second grouping of cylinders at an elevated high power fuel to air ratio. The fuel processor may include a synchronizer for synchronizing firing of the cylinders with the engine speed. Likewise, the fuel processor may include a sigma delta control circuit for generating a firing pattern that utilizes predictive adaptive control.
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