Limited Slip Differentials (LSDs)

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Limited Slip Differentials (LSDs)

• By Timothy Kwan

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Objective

• Explain what a limited slip differential (LDS) is
• Types of LSDs and how they work

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What is an LSD?

• Prevent wheel slippage
• Distributes torque to wheel that isnt slipping
• LSDs lock or slow down rotation of one output axel

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Types of LSDs

• 3 Main Types
• Clutch
• Viscous Coupling
• Torsen

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Clutch Type LSD

• Locks up using clutches

Gear shaft
From driveshaft
Pressure plate
Clutch plates
To right wheel
To left wheel
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Clutch LSD cont
Vehicle stationary
Pressure plate
Vehicle turning
Clutch disk (not shown)
Straight line driving
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Viscous Coupling LSD

• Locks up due to friction between fluid and plates

To right wheel
Viscous coupling
To left wheel
From driveshaft
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Viscous Coupling cont
From driveshaft
Viscous coupling unit
Differential
Stationary plates
fluid
Rotating plates (attached to shaft)
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Torsen LSD

• Locks up using gears

Worm gear
From driveshaft
To left wheel
Worm wheel
To right wheel
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Torsen LSD cont
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References

• http//www.billzilla.org/diffs.htm
• http//www.autozine.org/technical_school/traction/
  tech_traction_4wd_2.htm
• http//www.arstechnica.de/auto/differential/bauart
  en/viscokupplung.html
• http//www.popularmechanics.com/automotive/auto_te
  chnology/1302716.html?page4cy
• http//auto.howstuffworks.com/differential.htm