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. 03, 2019
Filed:
Apr. 22, 2016
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Harmonic Drive Systems Inc., Shinagawa-ku, Tokyo, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Ryosuke Hiyoshi, Kanagawa, JP;
Yoshiaki Tanaka, Kanagawa, JP;
Yoshihide Kiyosawa, Azumino, JP;
Jun Handa, Azumino, JP;
Kishiro Nagai, Atsugi, JP;
Junichiro Onigata, Atsugi, JP;
Yoshihiko Yamada, Fujisawa, JP;
NISSAN MOTOR CO., LTD., Yokohama-shi, JP;
HARMONIC DRIVE SYSTEMS INC., Tokyo, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-shi, JP;
Abstract
A variable compression ratio mechanism for an internal combustion engine includes a gear reducer that varies an engine compression ratio. The gear reducer includes an input-side member connected to a rotation shaft of an actuator; an output-side member that transmits a reduced rotation of the actuator to the control shaft; a fixed member fixed to a housing of the actuator; and an intermediate member that transmits torque from the input-side member to the output-side member and the fixed member, and has a first gear portion engaged with the fixed member and a second gear portion engaged with the output-side member. A ratio of a number of teeth of the fixed gear portion to a number of teeth of the first gear portion is lower than a ratio of a number of teeth of the output-side gear portion to a number of teeth of the second gear portion.