Increasing exhaust temperature for aftertreatment operation

Details Increasing exhaust temperature for aftertreatment operation Increasing exhaust temperature for aftertreatment operation

2006-03-16

2010-12-21

Nguyen, Tu M (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S285000, C060S300000, C123S19800E, C123S339100, C123S339120, C123S339190, C123S481000

Reexamination Certificate

active

07854114

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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