An opposed piston engine has a driveshaft with a first combustion cylinder parallel with a driveshaft and disposed about the driveshaft at a first radius and a second combustion cylinder parallel with the driveshaft and disposed about the driveshaft at a second radius greater than the first radius. A first pair of curvilinear shaped cams are associated with the first combustion cylinder and disposed on the driveshaft and a second pair of curvilinear shaped cams are associated with the second combustion cylinder and disposed on the driveshaft outwardly of the first pair of cams.

The invention relates to power take-off devices for internal combustion engines and can be used, in particular, in different vehicles for taking power from reciprocating internal combustion engines. The present power take-off device for an internal combustion engine comprises at least two pairs of transfer mechanisms, coupled to the pistons of an engine, wherein a transfer mechanism is adapted to convert the reciprocating motion of its corresponding piston into rotary motion of a corresponding power take-off shaft. Each transfer mechanism comprises a means of setting rotation, which is mounted on a shaft connected to the piston, said means comprising a transfer component with at least one continuous, wave-like, vertically guiding track in the form of a guiding contact path, and a running wheel which moves along the contact path and has a fixed vertical position. The device provides an increase in engine efficiency of up to 50% and reduces the number of revolutions for similar levels of power output.

An opposed piston engine has a driveshaft with a spaced apart cams mounted thereon. Each cam has a circumferential cam shoulder of a curvilinear shape selected to enhance flow through intake and exhaust ports. The curvilinear shape may be a segmented polynomial shape forming lobes which lobes are asymmetrical so that the lobe wavelength distance from a first trough to the lobe peak of an ascending shoulder portion of the lobe is greater than the lobe wavelength distance from the peak to a second trough of a descending shoulder portion of the lobe. Opposing cam shoulders may be shaped so as to always be converging or diverging from one another.

An opposed piston engine has a driveshaft with at least two combustion cylinders serially aligned along a center cylinder axis so as to be coaxial, where the center cylinder axis is parallel with but spaced apart from the driveshaft axis. A cam is disposed between adjacent combustion cylinders, as well as adjacent the outermost end of each combustion cylinder in order to reciprocatingly drive piston pairs disposed in each combustion cylinder.

An aircraft engine has a hollow driveshaft with a spool coaxial with the driveshaft and extending through the driveshaft to rotate independently of the driveshaft. A first harmonic cam is mounted on the driveshaft and a second spaced apart harmonic cam is mounted on the spool. At least one combustion cylinder is positioned between the cams along a combustion cylinder axis that is parallel with but radially spaced apart from the driveshaft. A piston assembly is disposed in each end of the combustion cylinder, with each piston assembly engaging a separate cam. A high-pressure compressor turbine is mounted on the driveshaft and driven by movement of a piston assembly, compressing air for the combustion cylinder. A rotating component is mounted on the spool and driven by movement of the other piston assembly. The rotating component may be another compressor turbine, a drive turbine, a fan or a propeller.

The invention relates to power take-off devices for internal combustion engines and can be used, in particular, in different vehicles for taking power from reciprocating internal combustion engines. The present power take-off device for an internal combustion engine comprises at least two pairs of transfer mechanisms, coupled to the pistons of an engine, wherein a transfer mechanism is adapted to convert the reciprocating motion of its corresponding piston into rotary motion of a corresponding power take-off shaft. Each transfer mechanism comprises a means of setting rotation, which is mounted on a shaft connected to the piston, said means comprising a transfer component with at least one continuous, wave-like, vertically guiding track in the form of a guiding contact path, and a running wheel which moves along the contact path and has a fixed vertical position. The device provides an increase in engine efficiency of up to 50% and reduces the number of revolutions for similar levels of power output.

The aim of the invention is to improve the efficiency of an axial-piston motor comprising at least one working cylinder fed by a continuously operating combustion chamber comprising a pre-combustion chamber and a main combustion chamber. To this end, the axial-piston motor is provided with a pre-combustion chamber comprising a check valve.

An axial piston motor with inner continuous combustion burns a compressed combustion medium with fuel in a continuously operating combustion chamber to form a working medium, the working medium is supplied to cyclical working cylinders in order to extract mechanical energy, and the mechanical energy extracted in the working cylinders is also used for the compression of the combustion medium. The compression is carried out in two steps or at a compression end temperature of less than 300 C. with a compression ratio of more than 10 and/or a rotating distributor includes at least two distributor openings which cyclically open and close the firing connections and/or are cyclically guided past or through firing channels.

To improve the efficiency of an axial piston engine, the invention proposes an axial piston engine with a combustion chamber which operates with two-stage combustion.

A refrigeration device includes a compressor, a condenser, an expansion valve, an evaporator, intake electromagnetic valves and exhaust electromagnetic valves, two-position three-way electromagnetic valves or two-position five-way electromagnetic valves, a cylinder group, a volume-variable airproof container, two-position two-way electromagnetic valves and a generator. The cylinder group is composed of two or more cylinders, refrigerant flows successively through the compressor, the intake electromagnetic valves, the cylinder group, the exhaust electromagnetic valves, the condenser, the expansion valve and the evaporator and finally enters the compressor from the evaporator, the cylinder group can do work to generate electricity through atmospheric pressure in the volume-variable airproof container and compensates for electric energy consumed by the compressor, and therefore the electric energy can be saved.