I knew this recently & I though I should share this with you guys..
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Another new BMW technology introduced in the F01/2 7-series is Integral Active Steering, an intelligent four-wheel steering system. Besides incorporating Active Steering, which varies the degree of power assistance to the steering as a function of speed, the system also turns the rear wheels as well. At high speeds, the rear wheels are turned in the same direction as the front wheels, allowing the car to glide across in lane-changing maneuvers.
However, at lowspeeds, negotiating the backalleys of downtown KL, the rear wheels are turned in the opposite direction of the front wheels. The rear wheels have a maximum steering lock angle of 3°, which is sufficient, BMW claims, to reduce the F02’s turning radius by up to 70cm – this makes a massive difiference in whether you’re able to clear the tight U-turn or not.
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Another new BMW technology introduced in the F01/2 7-series is Integral Active Steering, an intelligent four-wheel steering system. Besides incorporating Active Steering, which varies the degree of power assistance to the steering as a function of speed, the system also turns the rear wheels as well. At high speeds, the rear wheels are turned in the same direction as the front wheels, allowing the car to glide across in lane-changing maneuvers.
However, at lowspeeds, negotiating the backalleys of downtown KL, the rear wheels are turned in the opposite direction of the front wheels. The rear wheels have a maximum steering lock angle of 3°, which is sufficient, BMW claims, to reduce the F02’s turning radius by up to 70cm – this makes a massive difiference in whether you’re able to clear the tight U-turn or not.
Source
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