DEVICE FOR SUPERIMPOSING STEERING MOTIONS ON A POWER STEERING SYSTEM AS AN ASSISTANCE TO STEERING AND PROCESS FOR OPERATING THE DEVICE

摘要

A device (1) is disclosed for superimposing steering motions on a power steering system as an assistance to steering, in particular in motor vehicles with an input steering shaft (10) provided for carrying out a main steering motion and connected to an output steering shaft (21) by a non-self-locking transmission (3), a motor (2) provided for generating an auxiliary steering motion and coupled by its driven shaft (9) to the transmission (3) in order to superimpose the auxiliary steering motion on the main steering motion, and a switchable blocking device (4) for securing the driven shaft (9) against rotation. The blocking device (4) is a brake which, in the switched-on state, allows the driven shaft (9) to move when a couple generated at the driven shaft (9) on the wheel side exceeds a predetermined value. Also disclosed is a process for operating the device.