Patent ID: 6729295
Filing Date: 2004-05-04
Classification: F01C

Abstract:
A rotary piston engine having at least two rotary pistons, the at least two rotary pistons being formed as gearwheels, mounted in a rotatable fashion on mutually perpendicular axes in a housing, providing a closed seal for the at least two rotary pistons on both faces as well as around the circumferences, and being at one point in a sliding, mutually sealing engagement of gear teeth (8) with each other, wherein:a) the at least two rotary pistons have different diameters; b) internal teeth and external teeth of the at least two rotary pistons contact at an angle of 45Â° in each case and have slightly helical flanks; c) tooth spaces, forming a carburetion chamber, a compression chamber, and a working chamber, have an inside contour precisely matching the shape of the teeth; d) each of the internal teeth and external teeth of the at least two rotary pistons is assigned each of throughflow bores, wherein the latter forming a combustion chamber and being incorporated in the rotary piston, wherein said each of the through-flow bores opens into an outlet on the circular surface areas of the at least two rotary pistons which lie opposite to each other, wherein a closed seal being provided through certain angles of rotation for the bore at points opposing to housing walls which enclose one of the at least two rotary pistons in a sandwich arrangement; e) ahead of the point in a sliding, mutually sealing engagement of gear teeth, lies a first connecting duct for each of the at least two rotary pistons in the aforementioned housing walls wherein the first connecting duct provides a flow connection between one of the tooth spaces rotating past the first connecting duct 18 and said each of the throughflow bores and fills the latter with compressed air or a fuel mixture; f) behind the point in a sliding, mutually sealing engagement of gear teeth, lies a second connecting duct for each of the at least two rotary pistons in the aforementioned housing walls wherein the second connecting duct provides a flow connection between the throughflow bores rotating past the second connecting duct and one of the subsequent tooth spaces, into which the charge in said each of the throughflow bores expands; g) the aforementioned housing walls incorporate exhaust openings both before and after the point in a sliding, mutually sealing engagement of gear teeth as well as intake openings lying opposite to the exhaust openings, wherein the intake openings are connected to an air intake or a fuel mixture intake, and wherein the intake openings are flow-connected in sequence to the tooth spaces passing by, and wherein each of the intake openings overlaps each of the opposite-lying exhaust openings for a partial angle of rotation (a).