2. T/m & transfer case

• 4WD Transfer Case: Santa Fe base modification

• T/M Case: Modification of 4WD transfer matching part

• T/M Differential for 4WD: Modification of transfer matching part

3. Coupling & rear axle assembly

• Coupling: Same as Santa Fe

• Rear Axle: Santa Fe base modification

• Control Unit: Santa Fe base modification (Location: under the driver seat)

3.1 SPECIFICATION (ITM: Interactive Torque Management)

3.2 Location

3.3 Structure

3.4 Components

4WD ECU

3.5 Operation of coupling

• Constant speed drive: almost 2WD state

• Torque distribution (4WD state) changes according to the driving state (ex: sudden start, turning, at low-mu surface) by the ECU logic

• Basic information: Input torque (Throttle Position Sensor), Steering Angle Sensor, Wheel Speed Sensor, Brake Signal as well as ABS signal

• EMC Coil energizes to operate the Primary Clutch

• The amount of electromagnetic force in the Primary Clutch decides displacement of a Base Cam

• Displacement of the Base Cam increases frictional force between Inner Plates and Outer Plates of the Secondary Clutch

• While braking: performs a different control logic to get efficient braking

1) Modulating primary clutch

When an EMC Coil energizes, electromagnetic field is generated attracting an Armature as well as Primary Clutch and it increase the frictional force between inner metal plates and outer metal plates of Primary Clutch.

Higher frictional force applies bigger torque to rotate the Base Cam because the outer plates splined to a clutch housing and the inner plates splined to a Base Cam..

2) Apply force amplifier

When the primary torque in the Base Cam increases, the Base Cam begins to rotates over the Ball on the Apply Cam and it pushes the Apply Cam increasing the apply force to the Secondary Clutch.