Method and device for detecting the presence of an exhaust...

Details Method and device for detecting the presence of an exhaust... Method and device for detecting the presence of an exhaust...

2011-05-10

2011-05-10

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Exhaust system

C073S114750

Reexamination Certificate

active

07937994

ABSTRACT:
A method and device for detecting presence of an exhaust gas treatment system in an exhaust line of an internal combustion engine. The method determines the derivative of the temperature upstream of the treatment system, determines the derivative of the temperature downstream of the treatment system, and compares the downstream temperature derivative with a threshold value for detecting absence of the treatment system using a pre-determined upstream temperature derivative level.

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