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Vehicular drive system

a drive system and drive shaft technology, applied in the direction of electric propulsion mounting, battery/cell propulsion, gearing, etc., can solve the problems of difficult mounting of drive systems, and difficulty in mounting longitudinally, so as to reduce the total number of shafts and shorten the drive system

Inactive Publication Date: 2008-07-24
KAMADA ATSUSHI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]According to this structure, the clutch and the second electric motor are arranged on the first axis on which the output shaft of the engine is arranged, the transmission is arranged on the second axis which is different from the first axis, and the engine and the clutch on the first axis and the transmission on the second axis are parallel with each other. As a result, the dimensions in the transverse direction, i.e., the axial direction, of the vehicular drive system are able to be shortened.
[0011]According to the this structure, the first electric motor is also arranged on a different shaft than that of the transmission. As a result, the dimensions in the transverse direction, i.e., the axial direction, of the vehicular drive system are able to be shortened even more.
[0016]According to this structure, the second electric motor and the transmission are arranged on the second axis, which leaves some free space on the first axis. Thus, arranging the first electric motor on the first axis enables the space to be used effectively, thereby enabling the dimensions in the transverse direction, i.e., the axial direction, of the vehicular drive system to be shortened even more.
[0019]The brake and the first and second electric motors are all elements that typically have large radial dimensions on their respective shafts. Therefore, offsetting those elements which have large radial dimensions in the axial direction on their respective shafts enables the shafts to be closer together, which enables the longitudinal dimensions of the vehicular drive system to be made smaller.
[0023]Using a gear set as the power transmitting means between the first axis and the second axis obviates the need for a third axis to reverse the rotation of the second axis, which is necessary when a belt is used as the power transmitting means. As a result, the total number of shafts is able to be reduced, which enables the dimensions in the longitudinal direction, i.e., the radial direction, of the drive system to be shortened even more.

Problems solved by technology

Thus, while it is possible to mount this vehicular drive system longitudinally in a FR (front-engine-rear-drive) vehicle, it is difficult to mount transversely in a FF (front-engine-front-drive) vehicle or a RR (rear-engine-rear-drive) vehicle.
That is, this type of drive system may be difficult to mount when mounted with its axial direction parallel to the wheel axles.
In addition, the drive system may also be difficult to mount longitudinally if the mounting space is limited.

Method used

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Embodiment Construction

[0038]Next, exemplary embodiments of the invention will be described in detail with reference to the accompanying drawings.

[0039]FIG. 1 is a skeleton view of the structure of a vehicular drive system (hereinafter simply referred to as “drive system”) 10 to which the invention has been applied. This drive system 10 includes an engine 12 and a transmission case 14 which is a non-rotating member mounted to a vehicle body. The transmission case 14 houses a first motor-generator MG1 which serves as a first electric motor, a second motor-generator MG2 which serves as a second electric motor, a lock-up clutch Ci, a stepped automatic transmission (hereinafter simply referred to as “automatic transmission”) 16 which serves as a transmission, and a counter gear set 18 which serves as power transmitting means, and the like.

[0040]The first motor-generator MG1, the second motor-generator MG2, and the lock-up clutch Ci are all arranged in that order from the upstream side of the power transmissio...

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Abstract

A second electric motor is arranged on a first axis on which an output shaft of the engine is arranged, a transmission is arranged on a second axis which is parallel with the first axis, and a clutch is arranged on the first axis to selectively connect and disconnect the second electric motor and the transmission to and from the engine. Power on the first axis is transmitted to an input shaft of the transmission via a power transmitting mechanism.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2004-329201 filed on Nov. 12, 2004 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a vehicular drive system which is used in a vehicle such as an automobile.[0004]2. Description of the Related Art[0005]A vehicular drive system is known which includes an engine, two electric motors, a transmission, and a clutch that is operatively connected to the engine and can selectively connect and disconnect the transmission to and from the engine. One example of such a vehicular drive system is disclosed in US Patent Application Publication No. 2003 / 0127262A1. In this type of vehicular drive system, the clutch is provided in place of a fluid power transmitting device such as a torque converter, and the transmission shifts speeds while an input shaft thereof is operatively ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60K17/04B60K6/26B60K6/38B60K6/40B60K6/442B60K6/547B60K17/02B60L50/16F16H3/62F16H3/66
CPCB60K1/02B60K6/365B60K6/387B60K6/40B60K6/442B60K6/48B60K6/547F16H3/663F16H3/666F16H2200/006F16H2200/0086F16H2200/2007F16H2200/2023F16H2200/2097B60L1/003B60L1/02B60L7/12B60L15/2009B60L2240/12B60L2240/14B60L2240/421B60L2240/423B60L2240/425B60L2240/441B60L2240/443B60L2240/445B60L2240/486B60L2250/24B60L2250/26Y10S903/917Y02T10/72B60L50/61B60L50/16Y02T10/62Y02T10/64Y02T10/7072Y02T10/70
Inventor KAMADA, ATSUSHITABATA, ATSUSHIINOUE, YUJIIBARAKI, RYUJI
Owner KAMADA ATSUSHI
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