A rotary engine including a housing and housing head enclosing a combustion chamber, a piston including an output shaft and a piston disk within the housing and rotatable on a piston rotation axis, a quadrant within the housing and around the piston and rotatable on a quadrant rotation axis, wherein the quadrant rotation axis is acutely angled to the piston rotation axis, and a post surrounding a segment of the piston disk. The post pivots relative to the piston about a post-piston rotation axis that is normal to the face of the piston disk. The post pivots relative to the quadrant about a post-quadrant pivot axis that is perpendicular to the quadrant rotation axis. The post rotates about the quadrant rotation axis relative to the housing. Combusting fuel injected into the combustion chamber expands and pushes on the piston disk to rotate the output shaft about the piston rotation axis.

A method of operating an internal combustion engine having a housing, a piston mounted in the housing for complex motion about a plurality of axes and coupled to a shaft, and wherein occur phases of compression, combustion, and expansion in the housing, and wherein, in the compression phase, air introduced through an intake port into the housing is compressed by reducing volume of a compression chamber in the housing from an initial volume to a second volume that is less than the initial volume, and in the expansion phase, byproducts of combustion expand from the second volume to a third volume that is greater than the initial volume.

A Polygon Oscillating Piston Engine having multiple pistons on one of two oscillating disks. Each piston moves in a straight line along one of the sides of a polygon within a cylindrical chamber, while the oscillating disks move in an arc about a central shaft. The difference in the straight motion of the piston and angular motion of the oscillating disk is accommodated by a slip sleeve within the piston that slides on a peg or bar mounted to each disk. The engine can be configured to operate as an internal combustion engine that uses diesel fuel, gasoline, or natural gas, or it can be configured as an expander to convert high pressure high temperature gas to rotary power. This engines compact design results in a high power-to-weight ratio.

A Polygon Oscillating Piston Engine having multiple pistons on one of two oscillating disks. Each piston moves in a straight line along one of the sides of a polygon within a cylindrical chamber, while the oscillating disks move in an arc about a central shaft. The difference in the straight motion of the piston and angular motion of the oscillating disk is accommodated by a slip sleeve within the piston that slides on a peg or bar mounted to each disk. The engine can be configured to operate as an internal combustion engine that uses diesel fuel, gasoline, or natural gas, or it can be configured as an expander to convert high pressure high temperature gas to rotary power. This engines compact design results in a high power-to-weight ratio.

The invention relates to a piston machine which comprises: a housing with a chamber with has a substantially circle sector-shaped cross-section; a pivotal piston which is designed as a pivoting element, is arranged in the housing and comprises a first working surface, wherein the housing and the piston define at least one first variable working chamber; a drive or output which is connected to the piston; and an outlet which is arranged in the working chamber for discharging a working fluid. The housing has a cooling opening in at least one housing wall, said opening leading to the chamber at least for convectively cooling a piston side opposite the first working surface by means of a coolant.

A butterfly mechanism system includes a cylindrical housing with an inner surface and an outer surface; a first snitch having a first cylindrical body and a first two tabs extending away from the first cylindrical body; and a second snitch having a second cylindrical body and a second two tabs extending away from the second cylindrical body; the first snitch and second snitch are secured within the cylindrical housing the first two tabs and the second two tabs creating four chambers within the cylindrical housing. Both the snitches comprise of a bevel gear type mechanism and a ratchet and pawl type mechanism centered to the main output shaft.

A butterfly mechanism system includes a cylindrical housing with an inner surface and an outer surface; a first snitch having a first cylindrical body and a first two tabs extending away from the first cylindrical body; and a second snitch having a second cylindrical body and a second two tabs extending away from the second cylindrical body; the first snitch and second snitch are secured within the cylindrical housing the first two tabs and the second two tabs creating four chambers within the cylindrical housing. Both the snitches comprise of a bevel gear type mechanism and a ratchet and pawl type mechanism centered to the main output shaft.

An internal combustion butterfly engine system includes a cylindrical housing with an inner surface and an outer surface; a first snitch having a first cylindrical body and a first two tabs extending away from the first cylindrical body; and a second snitch having a second cylindrical body and a second two tabs extending away from the second cylindrical body; the first snitch and second snitch are secured within the cylindrical housing, the first two tabs and the second two tabs creating four chambers within the cylindrical housing.

An internal combustion butterfly engine system includes a cylindrical housing with an inner surface and an outer surface; a first snitch having a first cylindrical body and a first two tabs extending away from the first cylindrical body; and a second snitch having a second cylindrical body and a second two tabs extending away from the second cylindrical body; the first snitch and second snitch are secured within the cylindrical housing, the first two tabs and the second two tabs creating four chambers within the cylindrical housing.

Engines and methods execute a high efficiency hybrid cycle, which is implemented in a volume within an engine. The cycle includes isochoric heat addition and over-expansion of the volume within the engine, wherein the volume is reduced in a compression portion of the cycle from a first quantity to a second quantity, the volume is held substantially constant at the second quantity during a heat addition portion of the cycle, and the volume is increased in an expansion portion of the cycle to a third quantity, the third quantity being larger than the first quantity.