Mazda Speed 6. Manual - part 8

 

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Mazda Speed 6. Manual - part 8

 

 

03 DRIVELINE/AXLE

34

All Wheel Drive (AWD)

Front/rear wheel torque varies between 100/0 and 50/50 through an electronic 
torque coupling mounted in front of the rear differential

100/0 is only used when the hand brake is applied or at low speeds during 
tight turns (parking lot maneuvers)

Many AWD systems in FWD cars require front wheel slip (viscous couplings)  
before power is transferred to the rear, MAZDASPEED6 has a strong rear 
wheel bias in most driving conditions

Almost constant torque to the rear requires a water cooled transfer unit 

Water cooled 

Water cooled 
transfer unit

transfer unit

3-piece steel 

3-piece steel 
drive shaft

drive shaft

Electronic 

Electronic 
Control Coupling

Control Coupling

Tochigi-Fuji 

Tochigi-Fuji 
Limited Slip 

Limited Slip 
Differential

Differential

03 DRIVELINE/AXLE

35

The 4WD ECU uses real-time data to manage torque.

PCM: VSS, RPM, TP angle, neutral switch, brake pedal position, selector 
lever position
DSC: 4-wheel speed sensors, parking brake switch, ABS activated, steering 
wheel angle, brake fl uid pressure, back-up light, coupling torque request, yaw 
rate, and lateral G-force 
Rear Differential: oil temperature

03 DRIVELINE/AXLE

36

Transfer Unit

Water Cooling

 

03 DRIVELINE/AXLE

37

Torque always goes to the front wheels and the rear drive shaft.

 

 

 

 

 

 

 

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