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. 19, 2009
Filed:
Jan. 03, 2006
Atsushi Tabata, Okazaki, JP;
Yutaka Taga, Aichi-gun, JP;
Atsushi Tabata, Okazaki, JP;
Yutaka Taga, Aichi-gun, JP;
Toyota Jidosha Kabuhsiki Kaisha, Toyota-shi, JP;
Abstract
Upon shifting control of differential mechanism, speed ratio γof continuously-variable transmission portionand speed ratio γ of automatic transmission portionare determined by vehicle-output control deviceon the basis of target engine output P* and vehicle speed V, so as to establish an operating point of enginewhich provides the target engine output P* and which follows an optimum-fuel-economy curve, and the shifting control of the continuously-variable transmission portionand the shifting control of the automatic transmission portionare effected substantially concurrently, so that engine speed Ncontinuously changes, and the differential mechanismis shifted with a reduced shifting shock. Further, the speed ratio γof the continuously-variable transmission portion, in other words, the engine speed Nis changed by using first electric motor Mand/or second electric motor M, permitting an improvement in shifting response of the differential mechanism