Construction machine
US9719233B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 2016 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Sep 7, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An exhaust pipe (7A) in an engine (7) is provided with an exhaust gas purifying device (10) with a urea selective reduction catalyst (13A) removing nitrogen oxides in an exhaust gas. The exhaust gas purifying device (10) is provided with a urea water injection valve (14) that injects urea water as a reducing agent to the upstream side of the urea selective reduction catalyst (13A). The urea water injection valve (14) is connected to a urea water tank (22) through a urea water pump (25). The urea water pump (25) is arranged in an upper side to the urea water tank (22). A return conduit line (30) in which the urea water flows from the urea water pump (25) toward the urea water tank (22) is disposed in an upper-lower direction between the urea water pump (25) and the urea water tank (22).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.