Exhaust purification device of engine

Details Exhaust purification device of engine Exhaust purification device of engine

2011-03-01

2011-03-01

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...

C060S295000, C060S298000, C060S301000, C060S303000

Reexamination Certificate

active

07895829

ABSTRACT:
A DPF and a SCR catalyst are provided in an exhaust pipe, and a urea solution addition valve is provided between the DPF and the SCR catalyst for performing addition supply of urea solution into the exhaust pipe. In a urea solution supply system, the urea solution of prescribed concentration is stored in a urea solution tank, and a urea solution pump is provided in the tank. A urea solution supply pipe is connected to the urea solution pump. A part of the urea solution supply pipe is structured as a compound pipe structure defining two passages. One of the two passages serves as a urea solution passage, and the other one serves as an engine coolant passage.

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Japanese Office Action dated Aug. 24, 2010, issued in corresponding Japanese Application No. 2006-284628, with English translation.

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