Method and system for regenerating exhaust system filtering and catalyst components using variable high engine idle

US20080163610A1Inactive Publication Date: 2008-07-10DETROIT DIESEL
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
Publication Date
2008-07-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method and system for regenerating particulate filters, catalyzed soot filters, and NOx adsorber catalysts for a vehicle having a compression ignition engine.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to a system and method of regenerating particulate diesel engine exhaust filters.

[0002] The present invention relates to a system and method of regenerating diesel engine exhaust system particulate filters and catalysts.

[0003] The present invention further relates to a system and method of regenerating diesel engine exhaust system particulate filters and catalysts, as well as catalyzed and uncatalyzed cordierite, silicon carbide and sintered and unsintered substrates.

[0004] The present invention further relates to a system and method of regenerating diesel engine exhaust system particulate filters and catalysts, as well as catalyzed and uncatalyzed cordierite, silicon carbide and sintered and unsintered substrates while running the diesel engine at lower rpms to save on fuel costs and reduce noise.BACKGROUND

[0005] Diesel engine exhaust systems include particulate filters, catalyst soot filters, NOx adsorber catalysts, and selecti...

Examples

Embodiment Construction

[0022]Referring now to the drawings, wherein like numerals refer to like structures, and particularly to FIG. 1, a compression ignition engine 10 for an on-highway vehicle 12 is shown schematically. The engine 10 includes an engine control module 14 that controls operation of the engine 10 and also controls exhaust component regeneration and desulfation according to the present invention as described below.

[0023]Exhaust manifold sensors 16, exhaust sensors 17 located before the aftertreatment 19 and tail pipe sensors 18 provide exhaust temperature and other gas information to the engine control module (ECM) 14 that is used in controlling exhaust component regeneration. Those skilled in the art will recognize that while sensors 16 are depicted as manifold sensors, the sensors could be located in the engine exhaust piping upstream of the after treatment. The exhaust manifold sensors 16 may provide information regarding NOx levels, air / fuel ratios (λ), temperature, and pressure. More s...