EXHAUST GAS PURIFICATION DEVICE OF ENGINE

Title:

EXHAUST GAS PURIFICATION DEVICE OF ENGINE

Document Type and Number:

WIPO Patent Application WO/2005/028825

Kind Code:

A1

Abstract:

An exhaust gas purification device of an engine capable of increasing an efficiency for NOx purification treatment by preventing the clogging of an injection nozzle supplying a reducer to the upstream side of a reduction catalyst. Jetting holes (20) drilled in the injection nozzle (14) from the axis thereof outward are formed at a ring-shaped projected part (19) installed on the outer peripheral surface of an exhaust gas downstream side end part at the tip part (18) of the injection nozzle (14) extending to the downstream side generally parallel with the flow direction (A) of exhaust gas in an exhaust pipe (13), and the reducer is jetted to the exhaust gas upstream side of the reduction catalyst from the jetting holes (20). In this case, since the jetting holes (20) are formed at the ring-shaped projected part (19) installed on the outer peripheral surface of the tip part (18) and not directly opened to the large outer peripheral surface of the injection nozzle (14), the reducer does not adhere to and remain in a small area around the jetting holes (20) or the remained amount is reduced when the jetting is completed. Thus, the efficiency for NOx purification treatment can be increased by preventing the jetting holes (20) of the injection nozzle (14) from being clogged.

Inventors:

MASAKI NOBUHIKO (JP)
HIRATA KIMINOBU (JP)
UENO HIROKI (JP)

Application Number:

PCT/JP2004/012742

Publication Date:

March 31, 2005

Filing Date:

September 02, 2004

Export Citation:

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Assignee:

NISSAN DIESEL MOTOR CO (JP)
MASAKI NOBUHIKO (JP)
HIRATA KIMINOBU (JP)
UENO HIROKI (JP)

International Classes:

B01F3/04; B01F5/04; F01N3/08; F01N3/20; F01N3/36; (IPC1-7): F01N3/08; F01N3/36

Foreign References:

JP2002531743A	2002-09-24
JPH09509890A	1997-10-07
JPH08210124A	1996-08-20

Other References: