Motor vehicle steering apparatus with hydraulic coupling

摘要

A motor vehicle steering apparatus contains a user-operated steering angle input system with corresponding steering shaft as well as a piston-and-cylinder unit for coupling a steering angle setting system to the steering angle input system. The hydraulic unit comprises a piston-and-cylinder unit which is disposed with its longitudinal axis running transversely of the steering shaft, and its axially moving piston is coupled mechanically with the rotatory steering shaft and divides the cylinder into two working chambers. The two cylinder halves forming working chambers are disposed on opposite sides of the steering shaft. The piston is configured as a dual piston and is coupled to the steering shaft by a coupling section lying between its ends defining the working chambers. Thereby, a steering apparatus with a compact hydraulic coupling between the steering angle input system and the steering angle setting system is provided, with the ability to rotate the steering angle input system.