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:
Feb. 02, 2010
Filed:
Jun. 11, 2007
Naoto Tanaka, Okazaki, JP;
Hiroji Taniguchi, Okazaki, JP;
Shinya Toyoda, Nisshin, JP;
Tadashi Tamura, Nishikamo-gun, JP;
Akira Hino, Toyota, JP;
Yasunari Matsui, Okazaki, JP;
Naoto Tanaka, Okazaki, JP;
Hiroji Taniguchi, Okazaki, JP;
Shinya Toyoda, Nisshin, JP;
Tadashi Tamura, Nishikamo-gun, JP;
Akira Hino, Toyota, JP;
Yasunari Matsui, Okazaki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A maximum flow calculating unit calculates a maximum amount of hydraulic fluid that can flow into or out of an input-side hydraulic cylinder when a shift control command signal is set to a reference DUTY value, based on an estimated valve pressure difference calculated by an estimated pressure difference calculating unit, and a post-guard target sheave position setting unit performs a guard process for restricting the amount of change of the sheave position, using a guard value calculated by a guard value calculating unit based on the maximum flow amount, so as to set a post-guard target sheave position. Since the thus set target sheave position does not undergo excessive large changes nor excessively small changes during shifting, a target value for shifting is set so that a feedforward controlled variable determined based on the amount of change of the target sheave position becomes an appropriate value.