Title:
EXHAUST GAS PURIFICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/181151
Kind Code:
A1
Abstract:
An exhaust gas purification device (14) is provided with a urea selective catalytic reduction catalyst (21), a urea-water solution injection valve (24), a urea-water solution tank (25), a urea-water solution conduit (26), a urea-water solution supply device (30), and a urea-water solution filter (34). A heater (37) for thawing a urea-water solution frozen within a filter case (35) which constitutes the urea-water solution filter (34) is provided at the center (position of axis) of the inside of the filter case (35). The urea-water solution conduit (26) is constituted by: a tank-side urea-water solution conduit (27) having one end (27A) which is connected to the urea-water solution tank (25), and having the other end (27B) which is open, within an unfiltered-solution chamber (35E), to the bottom surface of the filter case (35); and an injection valve-side urea-water solution conduit (28) having one end (28A) which is open, within a filtered-solution chamber (35F), to the upper surface of the filter case (35), and having the other end (28B) connected to the urea-water solution injection valve (24).
Inventors:
NISHIGUCHI HITOSHI (JP)
FUJII TOSHINORI (JP)
IMI MASAHARU (JP)
FUJII TOSHINORI (JP)
IMI MASAHARU (JP)
Application Number:
PCT/JP2019/000805
Publication Date:
September 26, 2019
Filing Date:
January 14, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F01N3/08
Domestic Patent References:
| WO2016193036A1 | 2016-12-08 |
Foreign References:
| US20090078692A1 | 2009-03-26 | |||
| JP2015508706A | 2015-03-23 | |||
| JP2012172562A | 2012-09-10 | |||
| JP2016133115A | 2016-07-25 |
Attorney, Agent or Firm:
HIROWA PATENT FIRM (JP)
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