公开(公告)号：US20180266293A1

公开(公告)日：2018-09-20

申请号：US15756448

申请日：2016-08-29

Applicant: DOOSAN INFRACORE CO., LTD.

Inventor： Seung-Eun MOON ,  In-Hyuk IM ,  Tae-Hyung KIM ,  Nam-Il CHOI

IPC: F01N3/20 ,  F01N9/00 ,  F01N11/00 ,  G01L13/00

CPC classification number: F01N3/208 ,  F01N3/2066 ,  F01N9/00 ,  F01N11/002 ,  F01N2330/38 ,  F01N2550/02 ,  F01N2560/026 ,  F01N2560/08 ,  F01N2560/14 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1406 ,  F01N2900/1621 ,  G01F1/34 ,  G01L13/00 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: An exhaust gas cleaning system comprises a reducing agent injection module installed in an housing mounted in an exhaust pipe through which an exhaust gas is discharged, the reducing agent injection module being configured to inject a reducing agent into the housing, a selective catalyst reduction device installed in rear of the reducing agent injection module and configured to catalytic react the reducing agent with nitrogen oxide included in the exhaust gas to reduce the nitrogen oxide, a differential pressure sensor to detect a differential pressure between a pressure in the housing in front of the selective catalyst reduction device and a pressure of the housing in rear of the selective catalyst reduction device, and a control device to receive the pressure information from the differential pressure sensor and to output a first warning signal when the detected differential pressure is lower than a predetermined pressure.