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, 2021
Filed:
Aug. 31, 2017
Nissan Motor Co., Ltd., Kanagawa, JP;
Kenji Suzuki, Kanagawa, JP;
Hirofumi Miyauchi, Kanagawa, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Abstract
An internal combustion engine () has a variable compression ratio mechanism () that varies a mechanical compression ratio and a variable valve timing mechanism () that varies a valve timing of an intake valve (). When there is a demand to execute reference position learning (step) for system calibration of the variable valve timing mechanism (), the execution of the reference position learning is permitted on the condition that the mechanical compression ratio is higher than a threshold value VCRth (step). When any anomaly is present in the variable compression ratio mechanism (), the reference position learning of the variable valve timing mechanism () is prohibited (stepsand).