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:
Mar. 13, 2012
Filed:
Feb. 23, 2005
Atsushi Tabata, Okazaki, JP;
Yutaka Taga, Aichi-gun, JP;
Atsushi Tabata, Okazaki, JP;
Yutaka Taga, Aichi-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A vehicular drive system switchable between a continuously-variable and step-variable shifting states, and a control device for controlling the vehicular drive system so as to reduce a shifting shock of an automatic transmission included in the drive system, which takes place due to an overlap control involving a switching control of the drive system and a shifting control of the automatic transmission. Execution-timing control meansis provided to command switching control meansand step-variable shifting control meansto sequentially execute a switching control by the switching control means to switch transmission mechanismbetween an electrically established continuously-variable shifting state and a step-variable shifting state, and a shifting control by the step-variable shifting control means to shift an automatic transmission portion, even when an overlap control involving the switching control and the shifting control is required, whereby the switching and shifting controls can be rapidly completed. Since the transmission mechanismis not switched during the shifting control of the automatic transmission portion, the input speed of the automatic transmission portionwill not change due to the switching control, apart from a change of the input speed as a result of the shifting control, making it possible to prevent the complicated shifting control and reduce the consequent shifting shock.