Title:
EXHAUST EMISSION CONTROL UNIT
Document Type and Number:
Japanese Patent JP2016205188
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission control unit for suppressing a temperature drop in a connection pipe thereby to enhance the efficiency of the hydrolysis of urea water thereby to improve the exhaust gas emission control capacity of a catalyst.SOLUTION: An exhaust emission control unit comprises: a connection pipe 24 for feeding an exhaust gas to an SCR catalyst 41; and a urea water injection valve 30 for injecting urea water into the connection pipe 24. The connection pipe 24 includes an inner pipe 24B, into which urea water is injected from the urea water injection valve 30, and an outer pipe 24A for forming a double pipe structure together with said inner pipe 24B. A passage for the exhaust gas is formed on the inner side of the inner pipe 24B and between the inner pipe 24B and the outer pipe 24A.SELECTED DRAWING: Figure 4
Inventors:
OHARA ISAO
OSADA KATSUSHI
OSADA KATSUSHI
Application Number:
JP2015085716A
Publication Date:
December 08, 2016
Filing Date:
April 20, 2015
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
F01N3/08; B01D53/94; F01N3/24; F01N13/08
Domestic Patent References:
| JP2013133775A | 2013-07-08 | |||
| JP2013136991A | 2013-07-11 | |||
| JP2013245677A | 2013-12-09 | |||
| JP2011185493A | 2011-09-22 |
Foreign References:
| WO2014167355A1 | 2014-10-16 |
Attorney, Agent or Firm:
Akio Ikeda
Previous Patent: An abnormality diagnosis device of an internal-combustion engine
Next Patent: Valve device
Next Patent: Valve device