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. 31, 2009
Filed:
Aug. 10, 2004
Kazunori Nakamura, Tsuchiura, JP;
Tsuyoshi Nakamura, Ibaraki-ken, JP;
Kentaro Itoga, Abiko, JP;
Genroku Sugiyama, Ryuugasaki, JP;
Kazunori Nakamura, Tsuchiura, JP;
Tsuyoshi Nakamura, Ibaraki-ken, JP;
Kentaro Itoga, Abiko, JP;
Genroku Sugiyama, Ryuugasaki, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
The invention provides a control system for a working vehicle, which can realize higher work performance and better fuel economy in a compatible way. A controllerincludes tableand tablesfor deciding maximum pump absorption torques and engine output torques based on an engine revolution speed, and selectorsfor switching over the decided maximum pump absorption torques and engine output torques depending on a work performance mode or a fuel economy mode is selected. A pump absorption torque characteristic for the fuel economy mode is set so as to provide a relative small maximum pump absorption torques TB in a high revolution range, and an engine output characteristic for the fuel economy mode is set so as to provide a relatively small engine output torque in the high revolution range.