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1. (WO2017149809) CONSTRUCTION MACHINE

Pub. No.:    WO/2017/149809    International Application No.:    PCT/JP2016/075992
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Sep 06 01:59:59 CEST 2016
IPC: F01N 3/08
B01D 53/94
E02F 9/00
Applicants: HITACHI CONSTRUCTION MACHINERY CO., LTD.
日立建機株式会社
Inventors: ABE Shinya
安部 真也
SUZUKI Satoshi
鈴木 智士
Title: CONSTRUCTION MACHINE
Abstract:
A urea-water tank (22) and a urea-water pump (25) are connected to one another by means of a normal suction pipeline (27) through which urea-water sucked from the urea-water tank (22) toward the urea-water pump (25) flows, and a heater-equipped return pipeline (29) through which urea-water returning from the urea-water pump (25) toward the urea-water tank (22) flows. The urea-water pump (25) and a urea-water injection valve (14) are connected to one another by means of supply pipeline (28) through which urea-water being supplied by means of the urea-water pump (25) to the urea-water injection valve (14) flows. The heater-equipped return pipeline (29) is provided with a heating wire (29B) for heating the urea-water therein. The normal suction pipeline (27) is formed as a pipeline not provided with a heater. The heater-equipped return pipeline (29) and the normal suction pipeline (27) are disposed in contact with one another.