Limited Slip Differentials

Presented by: Jacky Lau Block: 8M-I

Objective:

 investigate the use, way of function, and design of LSDs  understand LSDs’ role in the performance of modern cars Limited Slip Differentials (LSD), presented by Jacky Lau

Wheel speeds in a car

   car wheels spin at different speeds especially in turns speed = distance / time http://isobe.typepad.com/photos/uncategorized/041213_wheel_tracking.jpg

Limited Slip Differentials (LSD), presented by Jacky Lau

What does a differential do?

 to aim the engine power at the wheels  to act as the final gear reduction in the vehicle, slowing the rotational speed  to transmit the power to the wheels while allowing them to rotate at different speeds Limited Slip Differentials (LSD), presented by Jacky Lau

Without differentials, what will happen?

 wheels would be locked together, forced to spin at the same speed  difficult to turn  tires and axle components will experience heavy stress Limited Slip Differentials (LSD), presented by Jacky Lau

Differentials- definition and location

 Definition: a device that splits the engine torque two ways, allowing each output to spin at a different speed.

http://auto.howstuffworks.com/differential2.htm

Limited Slip Differentials (LSD), presented by Jacky Lau

The LSDs (positraction)

 clutch-type LSD, the viscous coupling, locking differential and Torsen differential  most common type : clutch http://auto.howstuffworks.com/differential8.htm

http://www.club4ag.com/faq%20and%20tech_pages/limited_slips_diff erential_101.htm

Limited Slip Differentials (LSD), presented by Jacky Lau

LSDs (continued)

 viscous coupling – often used in AWD cars, linking the rear and front wheels  locking – serious off-road vehicles http://auto.howstuffworks.com/differential10.htm

Limited Slip Differentials (LSD), presented by Jacky Lau

References

 http://www.club4ag.com/faq%20and%20tech_pa ges/limited_slips_differential_101.htm

 http://auto.howstuffworks.com/differential10.htm

 http://www.houseofthud.com/differentials.htm

 http://truckworld.tenmagazines.com/How-To Tech/Lockers-Differentials/4x4Lockers-Diffs.html

 http://isobe.typepad.com/robotics/