Exhaust gas purification apparatus

Details Exhaust gas purification apparatus Exhaust gas purification apparatus

2007-05-04

2010-06-29

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S292000, C060S295000, C060S301000, C060S303000

Reexamination Certificate

active

07743603

ABSTRACT:
An exhaust gas purification apparatus of an engine, capable of preventing erroneous detection of an injection nozzle clogging, and having a reducing catalytic converter disposed in an exhaust system, for reducing and purifying nitrogen oxide in the exhaust gas using urea water; a urea water tank storing the urea water; a urea water supply unit sucking up the urea water from the urea water tank and mixes it with high-pressure air for delivery; and an injection nozzle injecting the urea water mixed with the high-pressure air, into an exhaust gas moving upstream side of the reducing catalytic converter in an exhaust gas passage, and further having a clogging detection unit capable of detecting clogging of the injection nozzle based on each detection output of a pressure of the air introduced into the urea water supply unit, and a temperature of the injection nozzle.

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