AWD Control Module Description and Operation

Description

The AWD control module distributes driving force between the front and rear wheels by controlling the multi-plate clutch in the transfer case. It analyzes input information, such as wheel speed, accelerator pedal position, and steering wheel angle, according to road and driving conditions. The AWD vehicle has different power transmission conditions depending on driving and road conditions. Vehicle speed is received via the CAN bus from the ABS/VDC control module. CAN communication information includes APS, which indicates the driver's acceleration intent, engine torque, ABS/VDC operation signal, and gear position. The AWD control module controls the BLDC motor, warning lamp and indicator lamp, and communicates with the diagnostic tester. When the vehicle is driven at a normal speed above 60 km/h on normal roads, it is controlled in 2WD mode. The control module determines the driving force on the front and rear wheels by receiving signals from all sensors according to driving conditions, such as sudden starts, cornering, and driving on low-friction roads. Optimized torque suitable for the driving conditions is then delivered to the front wheels by calculating and controlling the transmitted torque data.