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. 10, 2007
Hiroatsu Endo, Nagoya, JP;
Masashi Yoshimi, Toyota, JP;
Shinichi Sasade, Nagoya, JP;
Kazuo Kawaguchi, Kasugai, JP;
Yoichi Tajima, Anjyo, JP;
Shinobu Nishiyama, Toyoake, JP;
Kazuomi Okasaka, Nagoya, JP;
Hiroatsu Endo, Nagoya, JP;
Masashi Yoshimi, Toyota, JP;
Shinichi Sasade, Nagoya, JP;
Kazuo Kawaguchi, Kasugai, JP;
Yoichi Tajima, Anjyo, JP;
Shinobu Nishiyama, Toyoake, JP;
Kazuomi Okasaka, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Aisin AW Co., Ltd., Aichi-ken, JP;
Abstract
A power output apparatus that suppresses wearing-out of the components of a transmission connected to a drive shaft and a rotating shaft of an electric motor as well as reducing the a shock imparted to the vehicle. The required drive power is output to the drive shaft by appropriately controlling and internal combustion engine, a power split device, the electric motor and a shifting portion. When the rotational speed of the drive shaft can be estimated, the speed ratio in the shifting portion is changed based on either the detected rotational speed of the drive shaft or the estimated rotational speed of the drive shaft and the rotational speed of the rotating shaft. However, when the rotational speed of the drive shaft cannot be estimated, the speed ratio is maintained in the shifting portion.