Exhaust gas cleaning apparatus having particulate collector...

Details Exhaust gas cleaning apparatus having particulate collector... Exhaust gas cleaning apparatus having particulate collector...

2006-12-07

2009-11-03

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S285000, C060S297000, C060S311000

Reexamination Certificate

active

07610749

ABSTRACT:
An exhaust gas cleaning apparatus (e.g., for a diesel engine) uses a collector for collecting particulates contained in the exhaust gas and is disposed in an exhaust pipe of the engine. Damages in the collector are detected based on a pressure difference between an inlet and an outlet of the collector. In order to correctly detect the damages based on the pressure difference, an exhaust gas volume flowing through the collector is increased to a target volume by raising exhaust gas temperature. The exhaust gas temperature is raised by injecting fuel into the engine at a time when an engine output is not increased by such fuel injection. The pressure difference, based on which damages in the collector are detected, is measured after the exhaust gas volume has reached the target volume. It is determined that damages in the collector have occurred if the pressure difference is lower than a predetermined value.

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Examination Report dated Jul. 29, 2008 in DE Patent Application No. 10 2007 000 094.6-26 with English translation.

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