Diagnostic method for an exhaust aftertreatment system

Details Diagnostic method for an exhaust aftertreatment system Diagnostic method for an exhaust aftertreatment system

2005-09-29

2010-12-21

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Exhaust system

C073S114710

Reexamination Certificate

active

07854161

ABSTRACT:
A diagnostic method for testing malfunction of a Selective Catalytic Reduction (SCR) exhausts aftertreatment system of an internal combustion engine. The method measures and registers a first mean NOx sensor value for a normal mass flow level of a fluid reducing agent, then a second mean NOx sensor value related to a higher mass flow level is measured and registered. The two registered NOx sensor values are compared and it is determined if, on one hand, the first value is higher than the second value, or, on the other hand, the first value is lower than the second value. The cause of the malfunction may be found in the dosing system or in the SCR catalyst.

REFERENCES:
patent: 5522218 (1996-06-01), Lane et al.
patent: 6079203 (2000-06-01), Wakamoto
patent: 6928806 (2005-08-01), Tennison et al.
patent: 2003/0051468 (2003-03-01), Van Nieuwstadt et al.
patent: 2008/0103684 (2008-05-01), Allmer et al.
patent: 2010/0071451 (2010-03-01), Matsunaga et al.
patent: 1426575 (2004-06-01), None
International Search Report from corresponding PCT/SE2005/001447.
International Preliminary Report on Patentability from corresponding PCT/SE2005/001447.
European Search Report for corresponding EP 05 78 8533.

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