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. 14, 2017
Filed:
Mar. 18, 2015
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Junichiro Sahashi, Susono, JP;
Hirokazu Suzuki, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A hybrid vehicle drive system, which permits an efficient change of a vehicle drive mode from any one of constant-speed-ratio engine drive modes to one of electric motor drive modes, with reduced deterioration of drivability of the hybrid vehicle. The hybrid vehicle drive system is constructed such that one of the electric motor drive modes can be established by releasing one of two coupling elements which are placed in the engaged state in a presently established one of the constant-speed-ratio engine drive modes, when the drive system is required to be switched from the above-described one of the constant-speed-ratio engine drive modes to any one of the electric motor drive modes, whereby the drive system can be efficiently switched from any one of the constant-speed-ratio engine drive modes to the above-indicated one of the electric motor drive modes, by simply releasing one of the above-indicated two coupling elements.