Rotary piston engine

Rotary piston engine having at least two rotary pistons (1, 7), both being formed as gearwheels mounted in a rotatable fashion on mutually perpendicular axes in a housing (3, 14, 15, 16, 17) providing a closed seal for the pistons on both faces as well as around their circumferences, and being at one point in a sliding, mutually sealing engagement of gear teeth (8) with each other, characterized in that:

• a) the at least two rotary pistons (1, 7) have different diameters;
• b) the teeth (10, 11) forming the individual pistons make contact at an angle of 45° in each case and have slightly helical flanks;
• c) the tooth spaces (12) whichs forms the chambers for carburetion and compression and the working chamber have an inside contour precisely matching the shape of the teeth;
• d) each tooth (10, 11) is assigned a throughflow bore (13), the latter forming a combustion chamber and being incorporated in the rotary piston (1, 7), which bore opens into an outlet on the circular surface areas of the rotary piston (1a, 7a) which lie opposite each other, a closed seal being provided through certain angles of rotation for the bore at these points by means of opposing housing walls (14, 15, 16, 17) which enclose one rotary piston (1, 7) in a sandwich arrangement;
• e) ahead of the tooth engagement point (8) lies a first connecting duct (18) for each rotary piston (1, 7) in the aforementioned housing walls (14, 16), which duct provides a flow connection between the tooth space (12) rotating past it and throughflow bore (13) and fills the latter with compressed air or a fuel mixture;
• f) behind the tooth engagement point (8) lies a second connecting duct (19) for each rotary piston (1, 7) in the aforementioned housing walls (15, 17), which duct provides a flow connection between the throughflow bore (13) rotating past and one of the subsequent tooth spaces (12), into which the charge in the throughflow bore (13) expands;
• g) the aforementioned housing walls (14, 16 and 15, 17) incorporate exhaust openings (20) both before and after the tooth engagement point (8) as well as intake openings (21) lying opposite the exhaust openings (20), with the intake openings being connected to an air intake or a fuel mixture intake, which openings are flow-connected in sequence to the tooth spaces (12) passing by.