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. 13, 2014
Filed:
Sep. 28, 2009
Eiji Ishibashi, Komatsu, JP;
Masayuki Mukaino, Komatsu, JP;
Shigeru Yamamoto, Hirakata, JP;
Yoshitaka Onodera, Hiratsuka, JP;
Takao Ishihara, Hirakata, JP;
Eiji Ishibashi, Komatsu, JP;
Masayuki Mukaino, Komatsu, JP;
Shigeru Yamamoto, Hirakata, JP;
Yoshitaka Onodera, Hiratsuka, JP;
Takao Ishihara, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A control device controls a hydrostatic transmission vehicle having a hydrostatic transmission including a variable displacement pump and a variable displacement hydraulic motor. The control device is configured to set a set vehicle speed based on a forward/rearward travel command and a gear stage command instructed by an operator, to set a torque limit usable for the hydrostatic transmission based on an engine speed, to set a vehicle speed limit based on a pressure in the hydraulic circuit and the torque limit, to select a lower one of the set vehicle speed and the vehicle speed limit, and to control respective displacements of the variable displacement pump and the variable displacement hydraulic motor based on the selected vehicle speed.