| 摘要 |
PROBLEM TO BE SOLVED: To prevent a problem that urea is deposited and solidified at a nozzle tip to form a cylindrical solid in an urea addition nozzle provided in an exhaust emission control device for reducing NOx contained in exhaust gas of a diesel engine. SOLUTION: In the urea addition nozzle 10 provided in an exhaust pipe at an exhaust gas upstream side of a selective reduction type catalyst provided in the exhaust pipe of the engine and injecting urea liquid toward the selective reduction type catalyst, water repellent coating layer 12 is formed around an injection port 2' at a nozzle tip 3. COPYRIGHT: (C)2009,JPO&INPIT
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