JM 4WD Electronically Controlled On-Demand 4WD System

APPLICATION * O: Optional Item, S; Standard Item

ADVANGATES Enhanced Vehicle Dynamics - Improved dynamics during acceleration and deceleration - Rapid activation and deactivation - Fully controllable torque transfer characteristics Enhanced Vehicle Driving Comfort and Transparency - No wind-up during tight cornering and parking - Optimal traction during acceleration Enhanced Vehicle System Compatibility - On-line communication with the CAN system Better Fuel Consumption - Compared with 4WD

Variable Torque Control - At Parking: Low or zero torque transfer (for easy and comfortable maneuverability) - Acceleration: High torque transfer for maximum traction - High speed driving: Reduced torque transfer, to minimum - Driving on slippery/wet roads: Swift activation of the coupling (for maximum traction and safety depending on the slip of the wheels) - ABS: Immediate deactivation on ABS signal - ESP/TCS: Immediate deactivation on ESP/TCS signal - Off-road: Rapid activation with high torque transfer for maximum traction ADVANGATES

LAYOUT OF JM 4WD SYSTEM

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

COUPLING & REAR AXLE ASSEMBLY -Coupling: Same as Santa Fe -Rear Axle: Santa Fe base modification -Control Unit: Santa Fe base modification

SPECIFICATION

LOCATION OF ITM COUPLING

STRUCTURE OF COUPLING EMC Coil Primary Clutch Apply Cam Secondary Clutch Back Plate Armature Clutch HousingCoupling Case From Front Wheel To Rear Wheel

COMPONENTS OF COUPLING [Housing] Primary Clutch [Primary Clutch] Armature Base Cam [Base Cam] [Armature]

COMPONENTS OF COUPLING Apply CamBase Cam Back Plate To rear differentialEMC connector

OPERATION OF COUPLING ·Throttle Position Sensor ·Wheel Speed Sensor ·Steering Angle Sensor ·ABS Signal 4WD ECU Torque distributed at the 4WD coupling Judge the driving state Decide an optimal torque distribution 4WD operation [Operating Chart]

OPERATION OF COUPLING Modulating Primary Clutch Apply Force Multiplier Secondary Wet Friction Clutch

OPERATION OF COUPLING MODULATING PRIMARY CLUTCH PRIMARY CLUTCH CLUTCH HOUSING ARMATURE Compress Primary Clutch Primary torque in base cam Input torque from propeller shaft Magnetic Field EMC COIL

OPERATION OF COUPLING APPLY FORCE AMPLIFIER Apply Force Primary torque in base cam Ball Apply Cam Base Cam Ball cam at rest Primary torque in base cam

DARY WET FRICTION CLUTCH Back Plate Clutch Plates Apply Cam Compress Secondary Clutch Clutch Housing Output torque to Rear Axle OPERATION OF COUPLING

INPUTS AND OUTPUTS 4WD CONTROL MODULE (ITMCM ) BATTERY & IGNITION1 STEERING ANGLE SENSOR (ESP by CAN) WHEEL SPEED SENSOR (ABS/TCS, ESP by CAN) ABS ACTIVE (by CAN) 4WD LOCK SWITCH TPS (by CAN) EMC 4WD WARNING LAMP DIAGNOSIS INPUTSOUTPUTS 4WD LOCK LAMP

CAN COMMUNICATION

OUTPUT SIGNAL [CAN-LOW][CAN-HIGH]

STEERING ANGLE SENSOR Application - Location: Inside steering wheel - Calculate the steering amount and direction - 3 Input Signals (ST 1, ST 2, ST N) -ST N detects the neutral position of steering wheel - Output voltage :1.3V OL2.0V, 3.0V OH4.1V

ST1 ST2 [Steering sensor output, ST1/ST2] ST1 STN [Steering sensor output, ST1/STN] OUTPUT SIGNAL STEERING ANGLE SENSOR

ACTIVE WHEEL SPEED SENSOR - Type: Hall Effect - Components: HALL IC, Capacitor, Magnet - Output signal: Digital (Open Collector Type circuit integrated) - Good characteristics against temperature variation and noise - Low RPM Detection: 0 RPM can be detected - Air gap sensitivity: stable output pulse width against air-gap change -Supplying power: DC 12V

ABS ACTIVE SIGNAL ABSCM IGN ITMCM

4WD LOCK SWITCH [4WD LOCK Switch] [4WD LOCK Lamp] [When 4WD LOCK is selected] EMC output signal This switch is selected 4WD LOCK lamp comes on. The ITMCM applies maximum current to the EMC resulting in 50 to 50 torque distribution.

EMC (Electro Magnetic Clutch) The ITMCM varies the applied current to the EMC to make a torque distribution to the rear wheels. The EMC current increases then the magnetic force increases. Stronger magnetic force results in higher pressing force to secondary clutch. [Maximum duty ratio] [IG ON, with WOT]

4WD WARNING LAMP 4WD warning lamp blinks (2Hz) when a system failure is detected.