The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2018
Filed:
Feb. 19, 2015
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
In order to purify NOx in exhaust gas discharged from an engine, a urea water supply system is configured by a urea water injection valve, a urea water tank, urea water supply piping () and a urea water supply device (). Cooling water piping () that allows cooling water of the engine to flow through is laid along the urea water supply piping (), while the cooling water piping () is connected to the urea water supply device () at a connection portion () of an inflow pipe and a connection portion () of an outflow pipe, and a part () of the inflow pipe is installed to be close to connection portions () of the urea water supply piping () to the urea water supply device () within a predetermined distance range in which heat of the cooling water reaches the connection portions.