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:
Apr. 07, 2015
Filed:
Feb. 18, 2009
Teruo Akiyama, Kokubunji, JP;
Hisashi Asada, Yokohama, JP;
Takeshi Ooi, Oiso-machi, JP;
Komatsu, Ltd., Tokyo, JP;
Abstract
A first target engine speed Nand a high-speed control area Fare set according to a command value commanded by a command unit. A second target engine speed Nand a high-speed control area Fdefined on a low-speed side are set according to the first target engine speed N. A pump displacement D and an engine torque T of a variable displacement hydraulic pump are detected so that a target engine speed N corresponding to each of the detected pump displacement and engine torque is detected according to a preset relationship between a the pump displacement D and the target engine speed N and a preset relationship between the engine torque T and the target engine speed N during an engine control at the high-speed control area F. The drive of the engine is controlled so that the engine is driven at the target engine speed N.