TORQUE VECTORING DRIVE AXLE ASSEMBLY
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United States of America Patent
Stats
-
Nov 8, 2005
Grant Date -
Nov 10, 2005
app pub date -
May 7, 2004
filing date -
May 7, 2004
priority date (Note) -
Granted
status (Latency Note)
Importance
Abstract
A drive axle assembly includes a pair of axleshafts connected to a pair of wheels, and a drive mechanism for selectively coupling a driven input shaft to one or both of the axleshafts. The drive mechanism includes first and second drive units that can be selectively engaged to control the magnitude of the drive torque transferred and the relative rotary speed between the input shaft and the axleshafts. Each drive unit includes a planetary gearset disposed between the input shaft and its corresponding axleshaft, and a pair of mode clutches that may be activated to cause the planetary gearset to establish different speed ratio drive connections between the input shaft and the axleshaft. A control system including an electronic control unit (ECU) and sensors are provided to control actuation of the clutches so as to control the side-to-side traction characteristics of the drive axle assembly.
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