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Hybrid drive system

a hybrid drive and drive system technology, applied in the direction of gearing details, gearing, transportation and packaging, etc., can solve the problems of difficult to achieve the desired transmission torque, and achieve the effect of reducing the capacity, compact gear transmission devices, and compact hybrid drive systems

Inactive Publication Date: 2011-03-24
AISIN AW CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a hybrid drive system that includes a friction type continuously variable transmission device and a gear transmission device in a compact structure. The friction type continuously variable transmission device is filled with traction oil, while the gear transmission device is filled with lubricant oil. The overall layout of the hybrid drive system is improved by the use of a partition that supports the input and output members of the friction type continuously variable transmission device. The system includes an electric motor with a dedicated output shaft and a gear transmission device that forms a power transmission path to the differential device. The system is compact and efficient in terms of torque transmission and shifting."

Problems solved by technology

In such case, the belt type continuously variable transmission device can achieve a desired transmission torque even in the presence of lubricant oil, and the contact surface area between the pulleys and the metal belt is relatively broad; however, the contact surface area between the conical friction wheels and the metal ring is small and it is difficult to achieve a desired transmission torque with lubricant oil, so the use of specialized traction oil for achieving a sufficient shear torque is preferable.

Method used

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Embodiment Construction

[0035]A hybrid drive system to which the present invention is applied will be described below with reference to the attached drawings. As shown in FIGS. 1 and 2, a hybrid drive system 1 includes an electric motor 2, a cone ring type continuously variable transmission device (a friction type continuously variable transmission device) 3, a differential device 5, an input shaft 6 that moves in accordance with an output shaft of an engine (not shown), and a gear transmission device 7. The above devices and shafts are housed in a case 11 that is formed by two case members, that is, a case member 9 and a case member 10. Further, the case 11 includes a first space A and a second space B divided by a partition 12 in an oil-tight manner.

[0036]The electric motor 2 includes a stator 2a fixed to the first case member 9, and a rotor 2b provided on an output shaft 4. A first end portion of the output shaft 4 is rotatably supported by the first case member 9 through a bearing 13, and a second end ...

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Abstract

A hybrid drive system configured with an input shaft and a friction type continuously variable transmission (CVT) device. The CVT includes an input member drivingly connected to the input shaft, and an output member. Rotation of the input member is steplessly changed in speed and transmitted to the output member by a shear force of an oil film interposed at the contact position. The drive system includes an electric motor having a dedicated output shaft, a differential device, and a gear transmission device that is structured from a meshing rotary transmission mechanism. A case includes at least a first space filled with traction oil and accommodating the CVT device, and a second space filled with lubricant oil and accommodating the gear transmission device.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2009-218120 filed on Sep. 18, 2009, including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]The present invention relates to a hybrid drive system in which an engine and an electric motor drive a vehicle wheel, and more specifically relates to a hybrid drive system that integratedly incorporates a friction type continuously variable transmission device, such as a cone ring continuously variable transmission device.DESCRIPTION OF THE RELATED ART[0003]A conventional hybrid drive system in which an engine and an electric motor drive a vehicle wheel is known that integratedly incorporates one electric motor and a continuously variable transmission device. A belt type continuously variable transmission device is generally used as the continuously variable transmission device for the hybrid drive system. The belt type continuousl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16H37/02F16H15/04B60K6/36B60K6/387B60K6/40B60K6/405B60K6/48B60K6/543B60K6/547B60K17/02
CPCB60K6/48Y10T74/19014Y02T10/6221F16H57/0491F16H37/021B60K6/405F16H15/42B60K6/543Y02T10/62
Inventor YAMASHITA, MITSUGITAKAHASHI, SHOJIUMEDA, HIDEYUKI
Owner AISIN AW CO LTD
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