Method and device for diagnosis of an exhaust gas cleaning...

Details Method and device for diagnosis of an exhaust gas cleaning... Method and device for diagnosis of an exhaust gas cleaning...

2006-07-20

2009-02-03

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Exhaust system

Reexamination Certificate

active

07484407

ABSTRACT:
The invention is distinguished by a method and a corresponding device for diagnosis of an individual catalytic converter of an exhaust gas purification unit assigned to an internal combustion engine in the Y configuration, despite the lack of exhaust gas probe between the individual catalytic converter and a main catalytic converter. The diagnosis proceeds on the basis of signals from the exhaust gas probes belonging to the exhaust gas purification unit. On the basis of these signals, the oxygen storage capacity of the individual catalytic converter is determined despite the lack of exhaust gas probe between the individual catalytic converter and the main catalytic converter.

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