Title:
排気浄化装置
Document Type and Number:
Japanese Patent JP4290110
Kind Code:
B2
Abstract:
While an engine runs, the pressure in upper space of a reducing agent container having a sealed structure is increased up to a predetermined pressure p1 by a pressure regulator that is capable of arbitrarily regulating the pressure in closed space. On the other hand, while the engine is stopped, the pressure in the upper space of the reducing agent container is reduced by the pressure regulator to a predetermined pressure p2 that is at least equal to or below atmospheric pressure. While the engine runs, a liquid reducing agent is pressed by air present in the upper space of the reducing agent container and sent by pressure to a reducing agent supply system. Further, while the engine is stopped, the liquid reducing agent in the reducing agent supply system is reliably recovered to the reducing agent container. As a result, even if slight clogging occurs in the reducing agent supply system, the clogging is forcibly eliminated by the reducing agent sent by pressure, and only a solvent evaporates from the liquid reducing agent during the stop of the engine to suppress the solute of the agent from separating.
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Inventors:
Nobuhiko Masaki
Tomoyasu Harada
Tomoyasu Harada
Application Number:
JP2004320528A
Publication Date:
July 01, 2009
Filing Date:
November 04, 2004
Export Citation:
Assignee:
Nissan Diesel Industry Co., Ltd.
International Classes:
F01N3/08; B01D53/86; B01D53/94
Domestic Patent References:
| JP8193511A | ||||
| JP1210017A | ||||
| JP2002327617A | ||||
| JP3129712U | ||||
| JP2001523165A |
Foreign References:
| WO2003018177A1 |
Attorney, Agent or Firm:
Tomijio Sasashima