PatentsDB

Vehicle power transmission device and control system for power transmission

US8974337B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8974337-B2
Application numberUS-94713810-A
CountryUS
Kind codeB2
Filing dateNov 16, 2010
Priority dateNov 16, 2009
Publication dateMar 10, 2015
Grant dateMar 10, 2015

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

A power transmission apparatus for a vehicle which includes a first, a second, and a third rotor which split power among a motor-generator, an internal combustion engine, and a driven wheel of the vehicle. The apparatus also includes a torque transmission control mechanism which selectively transmits torque between the first rotor and the engine. When the torque transmission control mechanism establishes the transmission of torque between the first rotor and the engine, powers, as produced by the second and third rotors, are opposite in sign to each other. This enables the speed of the first rotor to be set to zero (0) or a very low speed. Therefore, when an initial torque is applied to the engine through the first rotor to start the engine, the mechanical vibration which usually arises from the application of initial torque and is to be exerted on the power transmission apparatus is minimized.

First claim

Opening claim text (preview).

What is claimed is: 1. A power transmission apparatus for a vehicle comprising: a power split device which includes a first, a second, and a third rotor which are configured to rotate in conjunction with each other to split power among an electric rotating machine, an internal combustion engine, and a driven wheel of the vehicle, the first, the second, and the third rotor being so linked and configured as to have rotational speeds that are arrayed on a straight line when graphic…

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Frequently asked questions

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What does patent US8974337B2 cover?
A power transmission apparatus for a vehicle which includes a first, a second, and a third rotor which split power among a motor-generator, an internal combustion engine, and a driven wheel of the vehicle. The apparatus also includes a torque transmission control mechanism which selectively transmits torque between the first rotor and the engine. When the torque transmission control mechanism e…
Who is the assignee on this patent?
Kawasaki Koji, Matsue Takenori, Denso Corp, and 1 more
What technology area does this patent fall under?
Primary CPC classification B60W10/02. Mapped technology areas include Operations & Transport.
When was this patent published?
Publication date Tue Mar 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).