Patent ID: 6481410
Filing Date: 2002-11-19
Classification: F01C,F02B,Y02T

Abstract:
An engine comprising a casing defining at least two overlapping and substantially disc-shaped internal rotor chambers, bi-axially mounted contra rotating rotors within said internal rotor chambers each of said rotors having a plurality of radiating rotor arms which mesh in overlapping regions of the internal rotor chambers, said rotors being provided with a central hub, at least two arms radiating from the hub, each arm having three faces, a head face and two opposed side faces, the opposite side faces being concave arcs which join the convex head face at the outer periphery of the rotor and join the hub at the center, said casing providing end walls, and internal rotor chamber perimeter walls a first side of the internal perimeter wall tracing and conforming to a circular path inscribed by the rotors and a second side perimeter wall having opposed arcuate surfaces which partially trace the circular path inscribed by the rotors joined by a common substantially linear section, the arrangement and construction being such that on rotation of the rotors a plurality of compression chambers are provided by the juxtaposed meshed arms of the rotors and the walls of the casing and an enlarged expansion chambers are provided by the juxtapositioned rotors and the second side rotor chamber perimeter walls, and a plurality of combustion chambers of different volumes provided on the same combustion stroke to allow at least one ignition firing on each combustion stroke.