Chassis and Suspension: Steering

Fig 1: Overview Of Steering System

Courtesy of BMW OF NORTH AMERICA, INC.

The rack-and-pinion power steering familiar from the F01 is used as steering in the F07. Servotronic, i.e. a speed dependent steering servo, is installed as standard in the F07. The servotronic valve on the steering box is controlled by the Integrated Chassis Management. The ICM also controls the electronic volumetric flow adjustment. This adjusts the volumetric flow of the power steering pump to the actual requirement. This, in turn, leads to a reduction of the fuel consumption and accordingly to a reduction of the CO2 emissions.

With the optional equipment Integral Active Steering, the steering gear of the front axle is supplemented by a planetary gearbox with override function, which supports a speed dependent steering gear ratio. The rear axle is equipped with Integral Active Steering, increasing the comfort and the driving dynamics. The components of Integral Active Steering: Active steering in front and rear axle slip angle control cannot be ordered separately, but are only available in a package as Integral Active Steering (SA 2VH as part of ZSP Sport Package).