Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
Exhaust gas purification apparatus for internal combustion engine
In an exhaust gas purification apparatus for an internal combustion engine which is provided with a selective reduction type catalyst disposed in an exhaust passage of the internal combustion engine, a reducing agent supply device for supplying an ammonia derived reducing agent to a portion of the exhaust passage at the upstream side of the selective reduction type catalyst, and a mixing device disposed in a portion of the exhaust passage at the upstream side of the selective reduction type catalyst and at the downstream side of the reducing agent supply device, the present invention has a problem to remove solid matter derived from the reducing agent, which is adhered to or deposited on the mixing device, in a suitable manner. In order to solve this problem, the present invention has a temperature raising device disposed in a portion of the exhaust passage upstream of said mixing device so as to blow a flame to said mixing device.
Toyota Jidosha Kabushiki Kaisha
Y F B F F B F F B F B F Y F B
Y02T F01N B01D F01N F01N B01F F01N F01N B01D F01N B01F F01N Y02T F01N B01D
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Takanori Tatsumi Haruyuki
Nakano Furukubo Katayama