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:
Sep. 27, 2022
Filed:
Dec. 28, 2017
Nissan Motor Co., Ltd., Yokohama, JP;
Ryohey Toyota, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A method controls a power transmission device including a continuously variable transmission, an electric oil pump provided in a first oil passage connecting primary and secondary pulley oil chambers of the continuously variable transmission, and a switching valve provided at a branch point between the first oil passage and a second oil passage that branches from the first oil passage between the electric oil pump and the primary pulley oil chamber and that is connected to an oil reservoir. A third oil passage branches from the first oil passage between the electric oil pump and the secondary pulley oil chamber. The method makes a magnitude of a hydraulic pressure difference between the third oil passage and the first oil passage one the side of the primary pulley oil chamber smaller than a prescribed threshold value when the switching valve switches between a first position and a second position.