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:
Jul. 06, 2010
Filed:
Sep. 20, 2007
Koichiro Muta, Okazaki, JP;
Tomokazu Nomura, Anjo, JP;
Daisuke Suyama, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Aisin AW Co., Ltd., Anjo-shi, JP;
Abstract
At the time of a change of a gearshift position SP from a neutral (N) position to a drive (D) position (step S), when a vehicle speed V is not lower than a preset reference speed Vref(step Syes), the control procedure of the invention connects a power shaft with a driveshaft and attains an actual gear change of a transmission to a first speed (step S). The reference speed Vrefmay be set to a slightly higher vehicle speed than an upper limit of a specific vehicle speed range having a potential for over rotation of a first motor by the gear change of the transmission to the first speed. When the vehicle speed V is lower than the preset reference speed Vref(step Sno), on the other hand, the control procedure prohibits the connection of the power shaft with the driveshaft and the actual gear change of the transmission to the first speed. This arrangement desirably prevents the over rotation of the first motor caused by the gear change of the transmission to the first speed in the state that the vehicle speed V is lower than the preset reference speed Vref