Calculate front/rear torque split for AWD systems based on center differential type and driving conditions.
Input Parameters
Results
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Front Axle Torque
lb-ft
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Rear Axle Torque
lb-ft
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Active Split
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Yaw Tendency
Note: Subaru uses symmetrical 50/50. BMW xDrive is 40/60 default. Audi Quattro Ultra is on-demand. Sport AWD (Porsche, Nissan GT-R) is rear-biased for agility. SAE 2010-01-0092.
Reference
Fixed: Front = T × F%, Rear = T × R%
On-Demand: F% = 90 − Slip×4, R% = 10 + Slip×4
Sport: F% = 30 + Slip×2, R% = 70 − Slip×2
Min split bounded at 50/50 under high slip
Yaw: rear bias → oversteer, front → understeer