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Differential In Automobiles

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Published in: Mechanical
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1.WHY WE NEED DIFFERENTIAL 2.TYPES OF DIFFERENTIAL 3.PARTS OF DIFFERENTIAL 4.WORKING 5.FAULTS

Gaurav / Kota

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  1. DIFFERENTIAL IN AUTOMOBILE I.WHY WE NEED DIFFERENTIAL 2.TYPES OF DIFFERENTIAL 3.PARTS OF DIFFERENTIAL 4.WORKING 5.FAULTS
  2. FUNCTION 'Transfers power from driveshaft to the wheels. 'Provides final gear reduction. 'Splits amount of torque going to each wheel. 'Allow the wheels to rotate at different speeds in turns.
  3. POWER FLOW 'Drive shaft spins the Pinion gear. 'Pinion gear turns the larger ring gear to produce gear reduction. 'Ring gear attached to differential case, hence it rotates with the ring gear. 'Differential case spins the sun gears which are attached to the axles. 'Axles transfer the power to the wheels. Croyn wheel shift Sun gear H.slf•$haft Planet pinion
  4. TO WHEEL DRIVE SHAFT TO WHEEL
  5. DIFFERENT TYPES OF DIFFERENTIALS ' Open Differential ' Limited Slip Differential (LSD) Clutch LSD ' Viscous Coupling LSD ' Locking LSD Torsen LSD
  6. SCHEMATIC OF AN OPEN DIFFERENTIAL ' The "Sun" gear and "Ring" gear are identical and supply power to the drive axles. ' The planetary gears, or spider gears allow the axles to rotate at different speeds. Planetary (Spider) Gears "Ring" Gear Axial Drive Shaft Planet Carrier (Ring Geæ) "Sun" Gear Pinion Gear Driveshaft
  7. N/A
  8. PARTS Pinion Drive Gear: transfers power from the driveshaft to the ring gear. Ring Gear: transfers power to the Differential case assembly. Side/spider gears: help both wheels to turn independently when turning. Differential case assembly: holds the Ring gear and other components that drive the rear axle. Ring gear Axle shaft side gear Axle shaft ousing Axle shaft Pinion gear Pinion shaft Universal joint Differential side gear Rear drive axles: steel shafts that transfer torque from the differential assembly to the drive wheels. Rear axle bearings: ball or roller bearings that fit between the axles and the inside of the axle housing. Axle housing: metal body that encloses and supports parts of the rear axle assembly.
  9. DIFFERENTIAL OVERVIEW ' When turning, the inner and outer wheels have arcs of different turning radii ' Consequently, the inner wheels travel less distance than the outer wheels Turn Center
  10. THE TORSEN DIFFERENTIAL , The Torsen Differential is capable of perfect differentiation , The Torsen Differential transfers power to the wheels with traction Torque transferred to wheel with traction
  11. APPLICATION OF TORSEN DIFFERENTIALS ' Torsen differentials are used in off-road and high performance all-wheel drive vehicles. ' Torsens can also be handy on icy or dirt roads Driver: Leman Strandberg www.stop.se Audi A6 quattm
  12. AUTOMOBILE COMPANIES USING THE TORSEN DIFFERENTIAL HUMMER , AM General ' Audi Audi BMW , Ford Honda Lexus -ROVER Land R Mazda $TOYOTA Toyota ' Volkswagen
  13. Front-Wheel Drive Transmission Differential Engine Engine Transmission All-Wheel Drive Front Differential Transmission Engine Rear Differential Center Differential Rear-Wheel Drive Differential Drive Shaft
  14. HYPOID GEAR 'Most of the modern differentials have Hypoid Gears. 'Pinion gear sits offset, lowered from the centerline of ring gear. 'Improved gear mesh because of larger gear tooth contact area. 'Improves gear life and reduce gear noise.
  15. PINION GEAR 'One side is attached to the ring gear and the other to yoke(drive shaft). 'Either a crushable sleeve or shims are used to preload the pinion bearings. 'Preload: a small amount of pressure applied to the bearings to remove play and excess clearance. 'Ring gear and pinion gears are a matched set. rLANGC or YOKE Location OUTER BEARING Cone COLLAPSIBLE SPACER has approximately constant crush force of typically 30.000 # INNER BEARING Cone PINION position SHIM '2UJ3 BeiBb-cnjcs Oordoh A. Robr.s Arbor, P/r:tl yr 2003. 10. 21
  16. DIFFERENTIAL TROUBLE SHOOTING *NOISY DIFFERENTIAL 1 .LESS LUBRICATION 2.LOW VISCOSWI OIL 3.WRONC ADJUSTMENT OF cRovnq WHEEL AND PINION TEETH 4.CRosm.1 WHEEL MISALIGNED ON CAGE
  17. DIFFERENTIAL ADJUSTMENT Ring and pinion gear backlash refers to the amount of space between the meshing teeth of the gears. 'Backlash is needed to allow for the heat expansion and lubrication. 'Too little back lash will cause the gears to jam and too much backlash will cause gear noise (whirring, roaring, or clunking). 'Hydrate ferric oxide (yellow oxide of iron) is used to check the contact pattern between pinion and ring gear. 'To increase move the ring gear away from the pinion gear. To decrease move the ring gear toward the pinion gear (controlled by case bearing nuts or shims).

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