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:
May. 31, 2016
Filed:
May. 19, 2014
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Shuuhei Noguchi, Higashiomi, JP;
Hajime Yoshida, Omihachiman, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A regeneration device burns particulate matter trapped in a filter in an exhaust gas purifying device to execute regeneration treatment of the filter. The regeneration device performs a determination whether or not the regeneration treatment is executed using a first estimated trapping quantity (H) estimated based upon a differential pressure (ΔP=P−P) as a difference between pressure (P) in an inlet side and pressure (P) in an outlet side of the filter and a second estimated trapping quantity (H) estimated based upon a rotational speed (N) of an engine, a fuel injection quantity (F) and an exhaust gas temperature (GT). In this case, the determination whether or not the regeneration treatment is executed is performed using only the second estimated trapping quantity (H) when the engine is in a predetermined low rotational condition.