Title:
SCR SYSTEM AND ENGINE
Document Type and Number:
WIPO Patent Application WO/2023/138342
Kind Code:
A1
Abstract:
An SCR system comprises a box body (10), a urea nozzle and a mixer. The mixer is arranged inside the box body (10), and is cylindrical, and the first end of the mixer faces the urea nozzle. The mixer comprises a check ring (20), a swirl tube (21) and a perforated pipe (22) which are connected in sequence. The check ring (20) is arranged close to the urea nozzle, and is provided with a plurality of first through holes (201). A plurality of second through holes (201) are formed in the swirl tube (21), and a plurality of third through holes are formed in the perforated pipe (22). The mixer further comprises a retaining ring (23), an inner ring of the retaining ring (23) is connected to an outer wall of the swirl tube (21) and/or the perforated pipe (22), and an outer ring of the retaining ring (23) is connected to an inner wall of the box body (10). Also provided is an engine. The SCR system solves the problem of SCR urea crystallization under a low-speed low-load working condition of an engine.
Inventors:
SHI DAILONG (CN)
WEI FULIN (CN)
ZHENG PENG (CN)
YANG JIAYUN (CN)
ZHANG XIAOLI (CN)
JIANG CHAO (CN)
LUO YI (CN)
WEI FULIN (CN)
ZHENG PENG (CN)
YANG JIAYUN (CN)
ZHANG XIAOLI (CN)
JIANG CHAO (CN)
LUO YI (CN)
Application Number:
PCT/CN2022/143611
Publication Date:
July 27, 2023
Filing Date:
December 29, 2022
Export Citation:
Assignee:
WEICHAI POWER CO LTD (CN)
International Classes:
F01N3/20; F01N3/28
Foreign References:
| CN114542248A | 2022-05-27 | |||
| CN208578613U | 2019-03-05 | |||
| DE102014112651A1 | 2016-03-03 | |||
| CN109488426A | 2019-03-19 | |||
| CN107438705A | 2017-12-05 | |||
| US20160061078A1 | 2016-03-03 | |||
| US20160032809A1 | 2016-02-04 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
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