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Electric drive axle with lubrication system

A technology of electric drive and lubricant, applied in the field of lubrication system

Pending Publication Date: 2021-08-20
DANA AUTOMOTIVE SYST GRP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lubrication guidance issues can be particularly challenging in transaxles and tightly packed planetary gear sets

Method used

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  • Electric drive axle with lubrication system
  • Electric drive axle with lubrication system
  • Electric drive axle with lubrication system

Examples

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Embodiment Construction

[0025] This paper describes a lubrication system for friction clutches in electric drive axles. The lubrication system efficiently guides lubricant to the friction clutches via lubrication channels in the space between the outer circumference of the axle shaft and the inner circumference of the output shaft of the gearbox. In one example, lubricant may be directed through a first outlet of a lubrication passage extending radially through the output shaft and a friction disk carrier to supply a targeted amount of lubricant to friction disks in the clutch. In this way, the lubrication requirements of the friction clutch can be met in a space-efficient manner. In one example, the lubrication system may further include a second outlet of the lubrication channel extending through the output shaft into an adjacent region of the one-way clutch coupled to the output shaft. In this way, the lubrication requirements of additional clutches in the e-axle can be met, if required.

[0026...

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Abstract

Methods and systems for an electric drive axle of a vehicle are provided. An electric drive axle system includes, in one example a gear train configured to rotationally attach to an electric motor-generator, the gear train includes an output shaft having a clutch arranged thereon and configured to selectively rotationally couple a gear to the output shaft. The gear train further includes a lubrication channel extending between an output shaft and an axle shaft and including an outlet extending through the output shaft and opening into the clutch.

Description

technical field [0001] The present invention relates to electric drive axles in vehicles, and more particularly to lubrication systems in electric drive axles. Background technique [0002] Electric axles have been incorporated into electric and hybrid vehicles to provide or enhance vehicle propulsion. Electric axles already include a gearbox that provides the required gear reduction between the electric motor and the drive wheels. Transaxles have also incorporated lubrication systems that direct lubricant to the gears and other components to reduce friction in the system. However, the compact nature of the transaxle can affect the ability of the lubrication system to meet the lubrication needs of the components. Thus, axle packaging compactness and component lubrication requirements may be competing design features in some cases. Lubrication guidance issues can be particularly challenging in transaxles and tightly packed planetary gear sets. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/04F16H37/08B60K17/16B60K17/02
CPCF16H57/0473F16H57/043F16H57/0427F16H57/0434F16H37/08B60K17/16B60K17/02F16H57/042B60Y2200/92B60Y2200/91B60K1/00B60K2001/001B60Y2400/73B60Y2306/03B60Y2410/102F16D2300/06F16H37/046F16H2200/0034F16H2200/0021B60K17/046B60K17/20F16D13/52F16D25/0638F16H3/089F16D25/10F16H57/0426F16H63/3026F16D25/062
Inventor E·M·恩格曼
Owner DANA AUTOMOTIVE SYST GRP LLC