Increasing exhaust temperature for aftertreatment operation
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United States of America Patent
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Dec 21, 2010
Issued Date -
N/A
app pub date -
Mar 16, 2006
filing date -
Mar 16, 2006
priority date (Note) -
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Abstract
One embodiment of the present invention includes an internal combustion engine system designed to increase exhaust temperature when operating with a low mechanical load—such as idle operation. This increased exhaust temperature is provided to operate aftertreatment equipment. Exhaust temperature is raised by operating a portion of the engine pistons in a brake mode to increase loading on a remainder of the pistons operating in a combustion mode to drive the engine. Fuel provided to pistons operating in the combustion mode is regulated to maintain speed of the engine within a desired idle speed range.
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