Patent ID: 6273055
Filing Date: 2001-08-14
Classification: F01C,F02B

Abstract:
A combustion engine comprised of (i) at least one compression stage, (ii) at least one combustion unit, and (iii) at least one expansion stage, wherein:a) the compression stage is comprised of a first housing portion defining two or more overlapping cylindrical bores and two or more cylindrical compression rotors which are disposed within the first housing portion and concentrically aligned within the bores respectively so that the compression rotors are in substantially sealing relation with one another at their respective pitch diameters, the compression stage being configured to (1) receive a fluid volume through a fluid inlet in the first housing portion, (2) compress the fluid volume, and (3) convey at least a portion of the compressed fluid volume to the combustion unit, andb) the expansion stage is comprised of a second housing portion defining two or more overlapping cylindrical bores and two or more cylindrical expansion rotors which are disposed within the second housing portion and concentrically aligned within the bores respectively so that the expansion rotors are in substantially sealing relation with one another at their respective pitch diameters, the expansion stage being configured to receive an expanding combustion volume from the combustion unit and to convey the combustion volume out of the second housing portion through an exhaust port, the combustion volume imparting a force to the expansion rotors, the force urging the expansion rotors to rotate.