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:
Oct. 25, 2016
Filed:
Jun. 03, 2013
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Yoshiaki Tanaka, Fujisawa, JP;
Ryosuke Hiyoshi, Atsugi, JP;
Yusuke Takagi, Hadano, JP;
Katsutoshi Nakamura, Atsugi, JP;
NISSAN MOTOR CO., LTD., Yokohama-shi, Kanagawa, JP;
Abstract
There are provided a variable compression-ratio mechanism () capable of varying an engine compression ratio in accordance with a rotational position of a control shaft (); a speed reducer () configured to reduce in speed a rotational power of an actuator and transmit the speed-reduced rotational power to the control shaft (); and a speed-reducer accommodating case () accommodating the speed reducer (). An input shaft of the speed reducer () which is connected to the actuator has a shaft center line extending along a horizontal direction, and at least a part of the input shaft is kept under a lubricating oil retained in the speed-reducer accommodating case (). The input shaft of the speed reducer () is swung by a predetermined swing angle to avoid inadequate lubrication of the input shaft of the speed reducer (), during an operating state where the engine compression ratio is maintained constant.