Secondary airflow system for engine exhaust emission...

Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...

Reexamination Certificate

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Details

C060S289000, C060S290000, C060S291000, C060S292000, C123S533000, C123S585000, C073S118040

Reexamination Certificate

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07131262

ABSTRACT:
In one example, a system for an engine having an intake system and an exhaust system is described. The system comprises: an airflow sensor coupled to the intake system; an air pump having at least an inlet side and an outlet side, said inlet side having a first coupling to the intake system downstream of said airflow sensor, said outlet side having a second coupling to the exhaust system; and a controller coupled to the engine, said controller, during operation, identifying whether degradation has occurred to at least one of said first and second couplings, and providing an indication of said identified degradation. Various other examples are also disclosed.

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patent: 05-263636 (1993-10-01), None

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