公开(公告)号：US20200256232A1

公开(公告)日：2020-08-13

申请号：US16642468

申请日：2019-01-31

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Toshinori FUJII ,  Hitoshi NISHIGUCHI ,  Masaharu IMI

IPC: F01N3/20 ,  F01N3/28

Abstract: There is provided a urea water supply device (25) that is disposed in a urea water pipe line (23) to supply urea water toward a urea water injection valve (21) from a urea water tank (22). A bracket (24) for attaching the urea water supply device (25) is attached to a revolving frame (5) of an upper revolving structure (3). A cover (31) for covering the urea water supply device (25) is attached to the bracket (24). On top of that, a urea water filter (33) that is disposed in the urea water pipe line (23) and traps foreign objects mixed into the urea water is attached to the cover (31).