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. 23, 2006
Filed:
Jun. 20, 2002
Hirokazu Shimomura, Ibaraki-ken, JP;
Tomohiko Yasuda, Kashiwa, JP;
Hirokazu Shimomura, Ibaraki-ken, JP;
Tomohiko Yasuda, Kashiwa, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A fuel injection control unit, including an electronic governor and a controller for an engine performs control in a governor region based on an isochronous characteristic. A working machine controller receives a delivery pressure signal P and controls a regulator such that, when the delivery pressure of a hydraulic pump exceeds a predetermined pressure Pthe displacement of the hydraulic pump does not exceed a value decided in accordance with a preset pump absorption torque curve. The working machine controller controls the regulator such that, when the delivery pressure of the hydraulic pumpis not higher than the predetermined pressure Pthe displacement of the hydraulic pump is increased as the delivery pressure of the hydraulic pump lowers from the predetermined pressure P
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile