4WD SYSTEM (ITM: Interactive Torque Management)

Electronically Controlled On-Demand 4wd System

Contents

1. INTRODUCTION ----------------------------------------------------------------------

2. T/M & TRANSFER CASE ---------------------------------------------------

3. COUPLING & REAR AXLE ASSEMBLY ---------------------------------------

4. INPUTS AND OUTPUTS -------------------------------------------------------------

5. DIAGNOSIS ------------------------------------------------------------------------------

6. WIRING DIAGRAM ---------------------------------------------------------------------

7. 4WD COUPLING ASSEMBLY -------------------------------------------------------

1. Introduction

Controllability of the vehicle in all driving situations is becoming an important promotional factor for All-Wheel-Drive. An AWD vehicle has better road handling and is safer in all driving situations.

Answering these requirements, the new Electronically Controlled On-Demand 4WD of JM offers fully controllable torque transfer characteristics and extremely rapid activation and deactivation automatically. SANTA FE equipped Diesel VGT (Variable Geometric Turbocharger) engine has been already using this system since November 2002. However most parts of the system such as T/M case, transfer case, front differential and rear differential cannot be interchangeable between JM and SANTA FE.

The characteristics of this system is that it is in the 2WD state at constant vehicle speed but it changes the torque distribution to rear wheels in the 4WD state according to the driving state.

1.1 Application

* O: Optional Item, S; Standard Item

1.2 Advantages

Maximum performance and safety are achieved in all driving situations, as shown here:

Enhanced Vehicle Traction

• Torque transfer up to 1,200 Nm

• Full function in reverse

• Instant activation on differential speed

Enhanced Vehicle Dynamics

• Improved dynamics during acceleration and deceleration

• Rapid activation and deactivation

• Fully controllable torque transfer characteristics

Enhanced Vehicle System Compatibility

• On-line communication with the CAN system

Enhanced Vehicle Driving Comfort and Transparency

• No wind-up during tight cornering and parking

• Optimal traction during acceleration

Enhanced Optimization of Weight and Fuel Consumption

• The fully controllable torque transfer characteristic decreases the design requirements of the complete AWD drive line, resulting in reduced weight and reduced fuel consumption

Variable Torque Control

• At Parking: Low or zero torque transfer needed for easy and comfortable maneuverability

• Acceleration: High torque transfer for maximum traction on all four wheels

• High speed driving: Reduced torque transfer, to minimum, still adding dynamic stability

• Driving on slippery/wet roads: Swift activation of the coupling for maximum traction and safety depending on the slip of the wheels. The coupling is in on-line communication with other safety systems in the vehicle

• Braking/ABS: Immediate deactivation on ABS signal to ensure full function of ABS system

• ESP/TCS Immediate deactivation on ESP/TCS signal to ensure full function of ESP/TCS system. Alternative is to communicate with the ESP/TCS system for adding the control possibility of the new ON-Demand 4WD System to the ESP/TCS System

• Off-road: Rapid activation with high torque transfer for maximum traction