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Torque vectoring drive mechanism having a power sharing control system

  • US 20050176543A1
  • Filed: 01/26/2005
  • Published: 08/11/2005
  • Est. Priority Date: 02/21/2003
  • Status: Active Grant
First Claim
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1. A drive axle assembly for use in a motor vehicle having a powertrain and first and second wheels, comprising;

  • an input shaft driven by the powertrain;

    a first axleshaft driving the first wheel;

    a second axleshaft driving the second wheel;

    a differential having an input component driven by said input shaft, a first output component driving said first axleshaft and a second output component driving said second axleshaft;

    a first speed changing unit having a first sun gear driven by said first output component, a first ring gear, and a set of first planet gears meshed with said first sun gear and said first ring gear;

    a second speed changing unit having a second sun gear driven by said second output component, a second ring gear, and a set of second planet gears meshed with said second sun gear and said second ring gear;

    a first clutch selectively engageable to brake rotation of said first ring gear;

    a first clutch actuator for controlling engagement of said first clutch by shifting a first electric motor between a motor mode and a brake mode;

    a second clutch selectively engageable to brake rotation of said second ring gear;

    a second clutch actuator for controlling engagement of said second clutch by shifting a second electric motor between a motor mode and a brake mode; and

    a control system for selectively switching said first and second electric motors between their respective motor and brake modes.

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