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1 dynamic steering system
dynamic steering system is a steering system technology called mdash Audi used; mdash; Audi DynAMIc Steering, In principle still apply the principle of superposition, but the use of structure BMW and Toyota but fundamentally different system, the core member is set to a harmonic gear mechanism is a core of the electrical control system. They might have more familiar concept to the harmonic gear, which is the use of the flexspline, and the relative movement of the wheel just wave generator, in particular a controlled elastic deformation (shape change) of the flexspline to effect movement and power transmission (defined from the network).
changes the steering ratio is wrong principle harmonic movement of the teeth of the conventional system. An input shaft attached to a steering wheel with a flexspline (thin ring gear) is connected to a flexible inner ball, ellipse center rotor motor drive, the output shaft is spline connected to the outer surface configuration, the rotor is locked when the stopper (the motor is not energized or fails), the steering ratio of the steering system remains constant. A motor driven central rotor while rotating, will lead to rotation of the flexspline, and the rotor when the flexspline co-rotating, since the teeth of the flexspline is smaller than the number of teeth of the outer spline, the angle of rotation of the wheel will be just greater than the flexspline, the steering angle is enlarged, and when the rotor is reversed, it is possible to reduce the steering angle acts.
compared to the planetary gear system, harmonic gear drive structure and dynamics of the steering system used for Audi has many advantages, the first is a relatively simple structure, without too complex gear structure, a small number of parts for easy maintenance. Second, this structure is high load carrying capacity, not squeamish, transmission ratio; the same time, its smooth operation, low noise, this value for quiet luxury model is very suitable; In addition, the structure of high transmission efficiency, and fast response and high precision operation.
Further Reading “mystery (2) of the steering wheel: Detailed steering system variable”