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:
Jun. 28, 2011
Filed:
Nov. 09, 2006
Hidenobu Tsukada, Tsuchiura, JP;
Kazunori Nakamura, Tsuchiura, JP;
Youichi Kowatari, Kasumigaura, JP;
Masaki Yoshikawa, Kasama, JP;
Hidenobu Tsukada, Tsuchiura, JP;
Kazunori Nakamura, Tsuchiura, JP;
Youichi Kowatari, Kasumigaura, JP;
Masaki Yoshikawa, Kasama, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A work machine gear shifting control system provides gear shifting conditions for an automatic gear shifting mode in accordance with work site conditions. An areaof a display devicedisplays a permissible velocity setting range and setup operation guidance, and another areashows guidance to indicate whether the setting is acceptable or unacceptable. When the traveling velocity falls within the permissible velocity setting range, the displayed guidance changes to indicate that the setting is acceptable. When, in this instance, an operator presses a setup switchwith desired timing, a transmission gear shifting control sectionacquires the prevailing vehicle velocity and velocity ratio (or vehicle velocity), and stores adjustment values in an adjustment value storage sectionso that the vehicle velocity and velocity ratio become the gear shifting control threshold values for normal gear shifting control (steps Sto S).