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. 15, 2014
Filed:
Sep. 11, 2008
Tadashi Kawaguchi, Hiratsuka, JP;
Jun Morinaga, Hiratsuka, JP;
Hiroaki Inoue, Hiratsuka, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
An engine control apparatus includes a hydraulic pump driven by an engine, a hydraulic actuator to which pressure oil discharged form the hydraulic pump is supplied, an operation lever configured to operate the hydraulic actuators, a detection means detecting operation amounts of operation lever means, an target flow rate calculation unit () calculating an target flow rate of the hydraulic pump based on the operation amount of the operation lever, a first target speed calculation unit () calculating a first target speed of the engine according to the target flow rate, a pump output limit value calculation unit () limiting the maximum target speed of the engine in an relief operation according to a load pressure of the hydraulic pump, a fourth engine target speed calculation unit ().