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Power transfer unit drive disconnect system

一种驱动系统、压力的技术，应用在运输和包装、控制装置、车辆部件等方向，能够解决小可用包装空间等问题

Active Publication Date: 2012-02-08
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In FWD-based powertrains, the relatively small available packaging space for power transfer units makes implementing drivetrain separation in FWD-based products very challenging

Method used

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  • Power transfer unit drive disconnect system
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Examples

Experimental program
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Embodiment Construction

[0011] attached figure 1 Illustrated is a drive system 10 that continuously connects a power source to a primary set of wheels, preferably the front wheels of a motor vehicle, and selectively connects a power source to a secondary set of wheels, preferably the rear wheels. The power source is the transmission output shaft 12 . Rotary power is transmitted to the wheels of the main wheel set via right and left axles 14 , 16 . Power is selectively transmitted to the wheels of the secondary wheel set through an input shaft 18 of a power transfer unit (PTU).

[0012] The hybrid planetary differential 20 includes a sun gear 22, which is fixed to the axle shaft 16 by a spline 24; a carrier 26, which is fixed to the axle shaft 14 by a spline 28; 32; a first planetary pinion 34 supported on the carrier and meshed with the ring gear 30; and a second planetary pinion 35 supported on the carrier and meshed with the sun gear 22 and the first planetary pinion 34. One side of the ring gea...

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PUM

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Abstract

A drive system includes a rotating power source, a planetary differential including a ring gear engaged with the power source, a sun gear secured to a first shaft and a carrier secured to a second shaft, a member secured to an output shaft, and a coupler alternately connecting and disconnecting the member and the ring gear.

Description

technical field [0001] The present invention generally relates to a motor vehicle powertrain that, in operation, continuously transmits power to a first set of wheels and selectively transmits power to a second set of wheels. Background technique [0002] Power transfer unit (PTU) efficiency is a concern for all wheel drive (AWD) vehicles derived from front wheel drive vehicle platforms due in part to the kinematics dictated by the speed and torque output by the transmission. For example, an AWD powertrain typically reduces fuel economy by about 5 percent over a front-wheel drive (FWD) powertrain. [0003] Driveline split is a nice refinement in rear-wheel-drive powertrains, but it's not seen in FWD offerings. The main difference between FWD-based and RWD-based AWD products is that the transfer case used on RWD-based products provides a convenient breakaway point. In FWD-based powertrains, the relatively small available packaging space for power transfer units makes implem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/34B60K17/16
CPCB60K17/346B60K23/08
Inventor 安德里亚斯·E·波拉克斯马修·D·哈蒙德劳伦斯·A·多伊奇史蒂文·A·福莱特
Owner FORD GLOBAL TECH LLC