Rotary internal combustion engine includes a body made of four parts, each of which is an L-shaped fragment, and, when connected, forming two mutually perpendicular ring-shaped walls in plan view with ribs on the outer surface and an annular groove inside, which form two passages, each of which contain a torus-shaped rotor, which can move along the groove. Each torus-shaped rotor has longitudinal notches located outside or inside the rotor forming cavities between the rotor and groove surface, connected to chambers located outside the walls. The intake and exhaust windows are made in the walls communicating with the cavities between the rotor and groove surface. The rotors are interconnected by the kinematic chain of rotation synchronization made of successively engaged gears, one of which is engaged with one torus-shaped rotor, and the last of the gears is engaged with the output shaft, rigidly connected with another torus-shaped rotor.

An oblong-shaped rotor engine with improved high sealing performance includes an upper end cover, a lower end cover, a rotor, three combustion chambers, three isolation zones, a fuel spray ignition unit, a sealing pin row and an eccentric driving shaft, a sealing pin row, which seals the transition zone between different combustion cylinders, wherein the engine according to this invention can better avoid the effect of structural wear, effectively enhance the sealing performance between combustion chambers and abate gas leakage between cylinders, wherein the designed profile and sealing means can enlarge the design error margin for engines, abate the processing difficulty of engines, and effectively decrease the production costs of engines.

An oblong-shaped rotor engine with improved high sealing performance includes an upper end cover, a lower end cover, a rotor, three combustion chambers, three isolation zones, a fuel spray ignition unit, a sealing pin row and an eccentric driving shaft, a sealing pin row, which seals the transition zone between different combustion cylinders, wherein the engine according to this invention can better avoid the effect of structural wear, effectively enhance the sealing performance between combustion chambers and abate gas leakage between cylinders, wherein the designed profile and sealing means can enlarge the design error margin for engines, abate the processing difficulty of engines, and effectively decrease the production costs of engines.

A round internal combustion engine (10) comprising: a stationary toroidal combustion chamber (44); a first (24A) and a second (24B) shaft member, each for connecting thereof to at least one piston (26A1, 26A2, 26B1, 26B2) disposed within the stationary toroidal combustion chamber (44); and a positioning mechanism (60), for changing angular positioning and velocity between the first (24A) and second (24B) shaft members, for increasing and decreasing a distance between the pistons (26A1, 26A2, 26B1, 26B2) of the shaft members (24A, 24B), the positioning mechanism (60) comprising: at least one rotatable wheel (28i, 28ii, 28iii) disposed eccentrically (58) within the first shaft member (24A); and at least one rotatable connecting-rod (56i, 56ii, 56iii) disposed between the first (24A) and second (24B) shaft members, for directly connecting an eccentric anchor (36A) of the at least one rotatable wheel (28i, 28ii) to an eccentric anchor (36B) of the second shaft member (24B).

A round internal combustion engine (10) comprising: a stationary toroidal combustion chamber (44); a first (24A) and a second (24B) shaft member, each for connecting thereof to at least one piston (26A1, 26A2, 26B1, 26B2) disposed within the stationary toroidal combustion chamber (44); and a positioning mechanism (60), for changing angular positioning and velocity between the first (24A) and second (24B) shaft members, for increasing and decreasing a distance between the pistons (26A1, 26A2, 26B1, 26B2) of the shaft members (24A, 24B), the positioning mechanism (60) comprising: at least one rotatable wheel (28i, 28ii, 28iii) disposed eccentrically (58) within the first shaft member (24A); and at least one rotatable connecting-rod (56i, 56ii, 56iii) disposed between the first (24A) and second (24B) shaft members, for directly connecting an eccentric anchor (36A) of the at least one rotatable wheel (28i, 28ii) to an eccentric anchor (36B) of the second shaft member (24B).

A rotary engine that includes at least two sets of baffles that are arranged between a cylinder body and a rotor, and are in seal fit with the inner wall of the cylinder body to form at least two sealed cavities in the cylinder body; at least one set of the baffle is a movable baffle, and can rotate around the center of the cylinder body; a one-way rotation mechanism is arranged between the movable baffle and the rotor, and drives the rotor to rotate in one direction. The rotary engine has the benefits that the sealed cavities are formed by the movable baffle and the cylinder body; four working strokes including air suction, compression, ignition and exhaust are carried out in each sealed cavity; the movable baffle rotates under acting and counter-acting forces, drives the one-way rotation mechanism to rotate, and then drives the rotor to rotate.

A rotary engine that includes at least two sets of baffles that are arranged between a cylinder body and a rotor, and are in seal fit with the inner wall of the cylinder body to form at least two sealed cavities in the cylinder body; at least one set of the baffle is a movable baffle, and can rotate around the center of the cylinder body; a one-way rotation mechanism is arranged between the movable baffle and the rotor, and drives the rotor to rotate in one direction. The rotary engine has the benefits that the sealed cavities are formed by the movable baffle and the cylinder body; four working strokes including air suction, compression, ignition and exhaust are carried out in each sealed cavity; the movable baffle rotates under acting and counter-acting forces, drives the one-way rotation mechanism to rotate, and then drives the rotor to rotate.

Disclosed is a single-stroke internal combustion engine including a cylinder seat and a power wheel. The cylinder seat has a circular cylinder, at least one first explosion chamber disposed on a cylinder wall, and an ignition system, a fuel supply system, a compression means, an exhaust means and an intake means installed at the external periphery of the cylinder seat corresponsive to each respective first explosion chamber and communicating with the cylinder. Each ignition system is corresponsive to the first explosion chamber; the power wheel is slidably coupled to the circular cylinder of the cylinder seat, and has at least one compression chamber and a second explosion chamber disposed adjacent to each other and rotably corresponsive to the first explosion chamber, fuel supply system, compression means, exhaust means and intake means of the cylinder seat. After the power wheel is turned on, air enters into the intake means and fuel gas is supplied from the fuel supply means, and both air and fuel gas are compressed in the compression chamber by the compression means and collected into the first explosion chamber and the second explosion chamber and ignited by the ignition system for explosion, and the explosion produced by the compressed fuel gas has a high explosive yield to drive the power wheel to rotate by the second explosion chamber, so that the power wheel is rotated constantly in a single direction to provide high-efficiency kinetic energy.

Disclosed is a single-stroke internal combustion engine including a cylinder seat and a power wheel. The cylinder seat has a circular cylinder, at least one first explosion chamber disposed on a cylinder wall, and an ignition system, a fuel supply system, a compression means, an exhaust means and an intake means installed at the external periphery of the cylinder seat corresponsive to each respective first explosion chamber and communicating with the cylinder. Each ignition system is corresponsive to the first explosion chamber; the power wheel is slidably coupled to the circular cylinder of the cylinder seat, and has at least one compression chamber and a second explosion chamber disposed adjacent to each other and rotably corresponsive to the first explosion chamber, fuel supply system, compression means, exhaust means and intake means of the cylinder seat. After the power wheel is turned on, air enters into the intake means and fuel gas is supplied from the fuel supply means, and both air and fuel gas are compressed in the compression chamber by the compression means and collected into the first explosion chamber and the second explosion chamber and ignited by the ignition system for explosion, and the explosion produced by the compressed fuel gas has a high explosive yield to drive the power wheel to rotate by the second explosion chamber, so that the power wheel is rotated constantly in a single direction to provide high-efficiency kinetic energy.

A rotary internal combustion engine with a housing having a fluid passage defined therethrough opening into a portion of its inner surface engaging each peripheral or apex seal of the rotor. An injector has an inlet for fluid communication with a pressurized lubricant source and a selectively openable and closable outlet in fluid communication with the fluid passage for delivering the pressurized lubricant to each seal through the fluid passage. A housing for a Wankel engine and a method of lubricating peripheral seals of a rotor in an internal combustion engine are also discussed.