A rotary engine and a rotary unit thereof are provided. The rotary engine includes an air-compressed rotary unit provided in an engine body and a power rotary unit moving in coordination with the air-compressed rotary unit. Each rotary unit includes an outer rotor and an inner rotor provided eccentrically within the outer rotor, inner teeth constituted by convex arc surfaces are formed in an inner circumference of the outer rotor and outer teeth constituted by concave arc surfaces are formed in an outer circumference of the inner rotor, such that intake and compression strokes of the air-compressed rotary unit and power and exhaust strokes of the power rotary unit are achieved during the engagement and disengagement between the inner and outer teeth. The rotary engine has a compact structure, a smooth output torque, a high power per liter, and can be widely used in fields of vehicle, power machinery, etc.

A rotary fluid machine has an inner rotor and an outer shell held by a stationary support structure, arranged so that sealing points on the inside of the shell interact in a sealing arrangement with the outer surface of the rotor to define working chambers, such that in use the relative motion of the rotor to the shell causes fluid to be moved through ducts in the rotor and rotor shaft, between the working chambers and a point where the rotor shaft interacts with the support structure.

A rotary machine is provided which includes a chamber. The chamber includes an island having an island outer surface. The outer surface is an elongated convex shape. The island includes a crankshaft port. The chamber includes a front-plate attached to a front surface of the island. A concave shaped contour is included, which is biased toward the island outer surface and which rotates with respect to the island. A working volume is defined between an inner surface of the contour and the outer island surface. At least one front-plate engaging bearing is provided, which extends from a front surface of the movable contour and over a guide edge of the front-plate. The front-plate engaging bearing engages the guide edge during a combustion cycle.

According to one embodiment of the invention, a gerotor apparatus includes a first gerotor, a second gerotor, and a synchronizing system operable to synchronize a rotation of the first gerotor with a rotation of the second gerotor. The synchronizing system includes a cam plate coupled to the first gerotor, wherein the cam plate includes a plurality of cams, and an alignment plate coupled to the second gerotor. The alignment plate includes at least one alignment member, wherein the plurality of cams and the at least one alignment member interact to synchronize a rotation of the first gerotor with a rotation of the second gerotor.

An internal combustion rotary engine includes an air passage configured to allow cool air to flow through the rotor as the rotor moves relative to the housing within the engine. Some embodiments include a removable fuel cartridge.

An engine housing includes a rotor housing body, a side housing body a side plate and a seal assembly. The rotor housing body extends about an axis to form a rotor cavity. The rotor housing body extends between and to a first axial end and a second axial end. The side housing body is disposed at the first axial end. The side plate includes an inner side, an outer side, and a perimeter edge extending from the inner side to the outer side. The seal assembly includes a support ring and a spacer. The support ring and the spacer extend about the axis. The support ring is mounted to the perimeter edge by a braze joint. The spacer extends between and to a first axial spacer end and a second axial spacer end. The first axial spacer end is disposed at the support ring and the outer side.

A rotary piston machine includes a casing and a rotor assembly, each with a hypotrochoidal. The rotor assembly includes apices that conform to the hypotrochoidal profile of the casing, and the relative motion of the casing and the rotor assembly create variable volumes. The variable volume allows the rotary piston machine to function as a compressor, an expander, an internal combustion engine, a positive displacement pump, or a fluid-driven motor.

A rotary piston machine includes a casing and a rotor assembly, each with a hypotrochoidal. The rotor assembly includes apices that conform to the hypotrochoidal profile of the casing, and the relative motion of the casing and the rotor assembly create variable volumes. The variable volume allows the rotary piston machine to function as a compressor, an expander, an internal combustion engine, a positive displacement pump, or a fluid-driven motor.