Patent ID: 7493885

Claim:
A method of efficiently producing power utilizing a rotary internal combustion engine having a main rotor contained in a housing, comprising the steps of: a) drawing a charge of combustion air and fuel into a first chamber through an intake port in the housing wall, the first chamber having periphery formed by the main rotor in a first revolution, the main rotor having opposed portions with a main and lesser radius being axially asymmetric and providing a sweeping seal against the housing at the main radius, a compression rotor cooperating with the main rotor in rotational engagement and having a fixed axis of rotation, a clearance rotor cooperating with the main rotor in rotational engagement and having a fixed axis of rotation and a portion of the housing; b) closing the intake port with the main rotor in a second revolution in cooperating rotational engagement with the clearance rotor; c) compressing the charge of combustion air and fuel by reducing the volume of the first chamber swept by the main rotor through the second revolution in cooperation with the compression rotor; d) igniting the charge of combustion air and fuel in a combustion chamber in the compression rotor; e) expanding the ignited charge in a second closed chamber, the second chamber having a periphery formed by the main rotor, the compression rotor cooperating with the main rotor in rotational engagement, the clearance rotor cooperating with the main rotor in rotational engagement; f) expelling exhaust through an exhaust port in the housing wall in communication with the second chamber with the main rotor during a third revolution in cooperating rotational engagement with the clearance rotor by reducing the volume of the second chamber through rotation of the main rotor.