Transfer Case: Description and Operation

GENERAL INFORMATION

- Electronic control AWD has been adopted to ensure the on-road performance, achieve lighter and smaller body, and realize better fuel economy.
- The electronic control AWD controls the torque of the electronic control coupling located between the propeller shaft and rear differential. This strategy is enabled by varying the torque distribution to the front and rear wheels from the status closer to the front wheel drive to the status closer to the direct coupling AWD and realizes the optimal drive force according to the various driving conditions.

AIMS OF DEVELOPMENT

Lightweight and simple construction of the electronic control AWD achieves good fuel efficiency and provides enjoyment of selecting the drive mode.

FUNCTION

- The adoption of the electronic control coupling satisfies both of the tight corner braking phenomenon* and traction performance.
NOTE:
*Tight corner braking indicates the following condition. When the AWD vehicle turns sharply on a pavement at low speed (ex. parallel parking), the rotational radius of the front and rear wheels differs, and this difference can no longer be compensated by the tire slippage. At this time, the driver feels as if the brake was applied.

- The electronic control AWD receives the signals of the throttle position and vehicle speed via CAN* communication protocol, detects the vehicle driving condition and operation of the driver, and distributes the proper torque to the rear wheels.
NOTE:
*:More information about CAN (Controller Area Network).

- Under severe driving condition, the system is protected by minimizing the limitation force of the differential.
- During high-speed driving, the fuel efficiency is improved by reducing the limitation force of the differential.
- The following drive modes are available according to the drivers' preference to provide the enjoyment of selecting functions.






CONSTRUCTION DIAGRAM





SYSTEM COMPONENT AND FUNCTION