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1 active steering system
The variable steering ratio BMW named quot; active steering quot ;, uses an electronic variable ratio steering system, the core of which is integrated in a steering column the planetary gear set inside. An electric motor assembly according to the current speed of the vehicle, according to the front wheel turning angle ratio adjustment.
At low speeds, for example in city traffic, the vehicle is parked or when traveling on winding mountain road, the steering angle is increased active steering system. For small steering wheel rotation, responds immediately to ensure that the driver can pass through tight spaces, without the need to repeatedly turn the steering wheel. Parking easier, flexibility has been strengthened.
at higher speeds, more gradual turn, requires less steering angle. Thus, the active steering system for reducing the steering angle of the steering wheel all the rotational amount of change. So the driver to obtain a more precise steering at high speed, and enjoy more stability and comfort.
If the vehicle is under threat of instability, or oversteer for example, when changing the brake surface, a DSC dynamic stability control system to identify the problem and to overcome the problem by the active steering system. For example, in order to reduce unsafe yaw, active steering angle of the steering wheel system can improve faster. Active steering system does not interfere with the direct connection between the steering wheel and the front wheel, so that even when the electronic system is a complete failure, the vehicle still remains fully controllable.