Method for determining the conversion performance of an...

Details Method for determining the conversion performance of an... Method for determining the conversion performance of an...

2007-09-25

2011-11-29

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

C060S274000, C060S285000, C060S301000

Reexamination Certificate

active

08065869

ABSTRACT:
In a method for determining the conversion performance of an oxygen storage-capable catalytic converter of an internal combustion engine, it is proposed that the catalytic converter be supplied with a stoichiometric exhaust gas composition, a known emission change is briefly undertaken and at the same time the signals of a lambda probe located downstream from the catalytic converter are detected so that based on the emission change and signals of the lambda probe a differentiated conclusion about the conversion performance of the catalytic converter for the pollutants hydrocarbon HC and nitrogen oxides NOx is delivered. According to the invention a simple and cost-effective method for differentiation of the pollutants hydrocarbon HC and nitrogen oxides NOx and thus for carrying out an improved diagnosis method is made available.

REFERENCES:
patent: 6721649 (2004-04-01), Knott et al.
patent: 2003/0070419 (2003-04-01), Kako et al.
patent: 10 2004 008 172 (2005-10-01), None

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