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. 22, 2011
Filed:
Nov. 09, 2006
Hidenobu Tsukada, Tsuchiura, JP;
Youichi Kowatari, Kasumigaura, JP;
Kazunori Nakamura, Tsuchiura, JP;
Masaki Yoshikawa, Kasama, JP;
Hidenobu Tsukada, Tsuchiura, JP;
Youichi Kowatari, Kasumigaura, JP;
Kazunori Nakamura, Tsuchiura, JP;
Masaki Yoshikawa, Kasama, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A work machine gear shifting control device is capable of readily identifying the cause of failure in learning the clutch hydraulic pressure for operating a transmission clutch. A transmission gear shifting control sectionis provided for each of clutches-, and performs a learning process in which each of a plurality of handling processes learns the clutch hydraulic pressure for each of the clutches-and determines the clutch hydraulic pressure characteristic values for operating the individual clutches. Further, the transmission gear shifting control sectionperforms a learning monitoring process in each of the plurality of handling processes to formulate an error judgment, which indicates whether learning has failed in each of the plurality of subprocesses, and displays the result of the judgment.