Quote:
Originally Posted by timesone
BMW xDrive: assured power and traction no matter the weather or terrain.
The BMW xDrive system intelligently controls the distribution of power to all four wheels to maximize traction, agility and directional stability in all weather and road conditions.
The xDrive system is linked to the chassis control systems at all times. A power take-off bevel gear on the front axle, a dual-section propeller shaft and a rear axle differential with an electro-hydraulically controlled hang-on clutch are used to efficiently split drive torque between the front and rear wheels as the situation demands. In driving situations that do not require all-wheel drive, the engine’s power is sent to the front wheels only. In adverse road conditions or highly dynamic driving situations, the hang-on clutch shifts drive power to the rear wheels in fractions of a second to significantly enhance traction, directional stability and the sporty handling expected from a BMW.
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Interesting about power to front wheels only in situations that do not need AWD, how would it know? I’m guessing by how it’s being driven, grip and the fancy computers that control the xdrive system.