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. 29, 2019
Filed:
Jun. 09, 2011
Yoshiyuki Shogenji, Toyota, JP;
Fumito Takimoto, Nagoya, JP;
Takashi Nakagawa, Toyota, JP;
Shunsuke Habara, Toyota, JP;
Yoshiyuki Shogenji, Toyota, JP;
Fumito Takimoto, Nagoya, JP;
Takashi Nakagawa, Toyota, JP;
Shunsuke Habara, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
A variable valve timing apparatus for an internal combustion engine, including: an actuator that activates a variable valve timing mechanism; a detection unit that detects a driving position of the actuator; a control unit that drive-controls the actuator, and when a predetermined execution condition is established, executes one of a first initialization process and a second initialization process that match the driving position of the actuator detected by the detection unit with an actual driving position of the actuator; and an abnormality determination unit that determines whether or not an abnormality is present in the driving position detected by the detection unit and stores an abnormality history after determining that an abnormality is present. The control unit executes the first initialization process when the abnormality history is stored and the second initialization process when the abnormality history is not stored.