Method and system for maintaining aftertreatment efficiency

Details Method and system for maintaining aftertreatment efficiency Method and system for maintaining aftertreatment efficiency

2007-05-31

2010-11-30

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S273000, C060S277000, C060S295000, C060S311000

Reexamination Certificate

active

07841172

ABSTRACT:
A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time.

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Southwest Research Institute, Technical Proposal, Diesel Aftertreatment Sensitivity to Lubricants (DASL) and Non-Thermal Catalyst Deactivation (N-TCD), Jun. 13, 2001 (54 pages).
Scaife et al., U.S. Patent Application filed May 31, 2007, entitled “Method and System for Maintaining Aftertreatment Efficiency,” (29 pages).

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