Rotary piston engine

摘要

The invention concerns an oscillating piston engine having a housing (2) in which several pistons (32, 34, 36, 38) oscillate about a piston axis (58) parallel to the central axis of the housing (42) and displace in a common rotational direction (40) around the axis of the housing (42). According to the invention, a curved piece (88) fixed to the housing is arranged in the center of the housing (12). The sides (70) of the pistons (32, 34, 36, 38) facing the curved piece (88) form running surfaces (100, 102), which are guided along an outer contour (90) of the curved piece (88) when the pistons are rotating (32, 34, 36, 38) and constantly come in contact with said contour.