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:
Mar. 14, 2017
Filed:
Dec. 24, 2012
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Hajime Yoshida, Omihachiman, JP;
Shuuhei Noguchi, Higashiomi, JP;
HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD., Shiga, JP;
Abstract
During an operation, a control device () for performing output control of an engine () determines whether or not the engine () and/or an exhaust gas purifying device () has a malfunction. If it is determined that the engine () and/or the exhaust gas purifying device () has a malfunction, a highest rotational speed of the engine () is controlled to a second rotational speed (Nt) higher by a predetermined amount (α) than a first rotational speed (Ns) at which an engine maximum torque (Tm) before the malfunction can be outputted. In this case, a maximum fuel injection quantity of the engine () is limited so that a rated torque (Tr) before the malfunction can be outputted at the first rotational speed (Ns).