2 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
3 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: Normal torque control on ESP/TCS signal - Off-road: Rapid activation with high torque transfer for maximum traction ADVANGATES
9 STRUCTURE OF COUPLING EMC Coil Primary Clutch Apply Cam Secondary Clutch Back Plate Armature Clutch HousingCoupling Case From Front Wheel To Rear Wheel
10 COMPONENTS OF COUPLING [Housing] Primary Clutch [Primary Clutch] Base Cam [Apply Cam] [Armature]
11 Apply Cam Back Plate To rear differentialEMC connector COMPONENTS OF COUPLING
12 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]
13 OPERATION OF COUPLING Modulating Primary Clutch Apply Force Multiplier Secondary Wet Friction Clutch SECTION VIEW
14 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
15 APPLY FORCE AMPLIFIER Apply Force Primary torque in base cam Ball Apply Cam Base Cam Ball cam at rest Primary torque in base cam OPERATION OF COUPLING
16 DARY WET FRICTION CLUTCH Back Plate Clutch Plates Apply Cam Compress Secondary Clutch Clutch Housing Output torque to Rear Axle OPERATION OF COUPLING
17 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
18 CAN COMMUNICATION OUTPUT SIGNAL [CAN-LOW][CAN-HIGH]
19 STEERING ANGLE SENSOR (Without ESP) 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 If ESP is adopted, SAS data is shared from ESP through Can communication.
21 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
22 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.
23 Is there any speed limitation with 4WD LOCK mode? Yes,there is. The maximum current flows until 35 km/h. When the vehicle speed is over 35 km/h, ITMCM controls the EMC current on the duty basis. Even so, 4WD LOCK lamp still remains on at the moment. When the vehicle speed comes down under 35km/h, the EMC current comes back to the battery voltage. Is the ESP operation available at the 4WD LOCK mode? Yes, ESP function operates as normal. 4WD LOCK SWITCH
24 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]
25 4WD WARNING LAMP 4WD warning lamp blinks (2Hz) when a system failure is detected.