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. 21, 2021
Filed:
Aug. 28, 2018
Jatco Ltd, Fuji, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Ken Son, Atsugi, JP;
Seiji Kasahara, Atsugi, JP;
JATCO LTD, Fuji, JP;
NISSAN MOTOR CO., LTD., Yokohama, JP;
Abstract
Selection solenoid valve () controls engagement/disengagement of travel clutch () in synchronization with a selecting operation of selector lever () that selects a range position of belt-type continuously variable transmission (CVT). Selection solenoid valve abnormality diagnosing unit () is configured to, when performing a selecting operation from no-drive range to drive range, if a time required for travel clutch () to be judged to be engaged from a start of selection of the drive range is less than a predetermined time, judge selection solenoid valve () to be a maximum hydraulic pressure side abnormality. When performing the selecting operation of drive range→no-drive range→drive range, if a selecting operation speed condition indicating that a no-drive range selection time is shorter than a setting time (Tth) is satisfied, execution of abnormality diagnosis of selection solenoid valve () is not permitted. With this configuration, misjudgment is prevented.