DIFFERENTIAL GEAR TRAINSTeam 25

Under supervision of

Prof. Mostafa Helaly

Eng. Mohamed Nabil

OUTLINES

Introduction & DefinitionApplicationsMechanism Design & Kinematics Analysis

MaintenanceLubrication

What Is DIFFERENTIAL?

Primary device in rear & 4 wheel drive systems in automotive technology

The main function of the differential is to allow these wheels to turn at different torques & RPM, while receiving power from the engine.

ADVANTAGES

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.

Increase the rate of tire wear.

Lack of safety in the course of the vehicle.

Loss part of the engine's ability.

Disadvantages

What happens if the wheels are on the same axle?!!

Increase the rate of tire wear

Increases of safety in the course of the vehicle

Loss part of the engine's ability

APPLICATIONS

Automotive Industry

Pumps

COMPONENTS

• Pinion Drive Gear

• Ring Gear

• Side/spider gears

• Differential case assembly

• Rear drive axles

• Rear axle bearings

• Axle housing

HOW IT WORKS?!

TYPES OF DIFFERENTIAL

1- Open Differential

2- Closed Differential

3- Limited Slip Differential

LUBRICATION

Parameters. Effects of wrong choice of the oil type.

Examples for lubrication oils used.

Steps of the lubrication process.

PARAMETERS

Excellent time to change gear fluid is when the differential has to be drained for axle service.

The oil must be able to withstand the shocks and loads created by the transfer of engine horsepower and torque to the wheels.

A major component of this high-pressure lubricant came from sperm whales.

These compounds have since been replaced with more modern manufactured equivalents.

CONSIDERATIONS

1- Proper weight, or viscosity.

2- GL rating

the best path to take is to use only what is specified for your differential.

3- the requirements of the limited slip, or traction-sensing differential.

An LSD without these special lubricants will at best not work correctly, and at worst fail outright, ending up costing a bundle to rebuild and repair.

WRONG CONSIDER. EXAMPLES

Filling up the case with the wrong gear oil can ultimately add up to an expensive guess.

Sulfur compounds used in extreme pressure lubricants smell either like rotten eggs or worse depending on additive concentration.

MOBIL LUBRICATION

THANK YOU!

Team members:

1- Esraa Tarek Mohamed No.36

2- Esraa Abd ElKader Mohamed No.37

3- Dalia Mahmoud ElGhayesh No.72

4- Dina Mohamed Younes No.74

5- Sabreen Abd ElHamid Ibrahim No.89

6- Aly Mohamed Mohamed No.103

7- Mohamed Mahmoud Mahfouz No.168