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:
May. 13, 2014
Filed:
Mar. 05, 2009
Masato Shimizu, Toyota, JP;
Masato Tateno, Toyota, JP;
Masayasu Mizobuchi, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A speed changing control apparatus for use in a vehicle includes: a driving power source configured to generate driving power for running; a transmission having a synchromesh mechanism configured to synchronize an input shaft revolution number with an output shaft revolution number and an actuator configured to automatically carry out a shift operation; and an automatic clutch disposed between the driving power source and the transmission. The speed changing control apparatus is configured to start a shift disengaging operation for the transmission after a speed change is requested and before the automatic clutch turns into a decoupled state, so as to suppress torsional vibration at the time of decoupling the automatic clutch. Such control enables the synchromesh mechanism to carry out revolution synchronization with the input shaft revolution number of the transmission in a lowered state, and diminishes a revolution difference subjected to synchronization.