Low pressure-rotary drive for internal combustion engine, has nut provided as part of differential pressure area or coupled with flexible bellow, such that deformation of pressure area automatically leads to translator movement of nut

摘要

The rotary drive has a not self-locking moving thread provided at a drive shaft end (5) and a nut (12). The nut is a part of a differential pressure area with a partially flexible bellow (11) or coupled with the flexible bellow, such that the deformation of the pressure area automatically leads to a translatory movement of the nut. A low pressure connection unit establishes an air-conducting connection with the pressure area, and a pressure spring is arranged between a housing base (17) and the nut. Independent claims are also included for the following: (1) a controlled intake manifold unit comprising a low pressure-rotary drive (2) a snow flap drive comprising a low pressure-rotary drive.