Veracruz FWD V6-3.8L (2009)
Transfer Case: Description and Operation
Description
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Based on a driver request for lock mode, the system will supply a fixed torque to the ITCC (Intelligent Torque Controlled Couplings) clutch.
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When the vehicle exceeds 30KPH the system will begin to disable lock mode by ramping down the ITCC clutch torque. When the vehicle exceeds
40 KPH the ITCC clutch is reduced to its minimum torque value. Lock mode is re-enabled following the same speed-to-torque map.
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Lock mode is activated based on part number.
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Lock mode will override all other system requests except for during an ABS event. During an ABS event the ITCC clutch is turned off.
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If there is a speed sensor signal fault, the speeds are no longer considered reliable and lock mode will be disabled.
Power Flow Mechanism
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Normal driving situation: 2WD base driving
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4WD driving in driving situations (rapid activation, cornering etc.)
1. Input the information from each sensor in vehicle
A. Input torque (Throttle position sensor)
B. Vehicle speed and different wheel speed front &rear (Wheel speed sensor)
C. Braking situation (Brake signal and ABS signal)
2. Distributed the required driving force after 4WD ECU operates.
3. ECU (Electric Control Unit) operates the primary clutch.
