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:
Feb. 11, 2014
Filed:
Oct. 14, 2009
Hidenobu Tsukada, Ushiku, JP;
Kouji Ishikawa, Kasumigaura, JP;
Yasushi Arai, Tsuchiura, JP;
Shohei Kamiya, Kasumigaura, JP;
Hidenobu Tsukada, Ushiku, JP;
Kouji Ishikawa, Kasumigaura, JP;
Yasushi Arai, Tsuchiura, JP;
Shohei Kamiya, Kasumigaura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An exhaust gas purification system for an engineering machine is capable of avoiding decreases in working efficiency during regeneration control by burning off a deposit of particulate matter from a filter efficiently during a work pause time. An operating sectionof a display monitoris used to set a work pause time and a work pause switchnotifies a vehicle body control unitthat the hydraulic excavator has entered a work pause state. In response, the vehicle body control unitcalculates the time required for a regenerating device to burn off the current amount of particulate matter deposited on the filter, and when the calculated time is longer than the preset work pause time, a regeneration controllerof an engine control unitis activated, and a solenoid control valveis switched to a closed position during the preset work pause time.