Abstract: Internal combustion engines having non-circular, preferably rectangular, cross-section pistons and cylinders are disclosed. The pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The pistons also may have a domed piston head with depressions thereon to facilitate the movement of air/charge in the cylinder. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves, and a split crankshaft. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge. The engines also may operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position.

Abstract: An air-cooled general-purpose engine includes: a cooling fan fixed to one end portion, protruding outward from one end wall of an engine main body, of a crankshaft; and a shroud which is mounted to the engine main body, and which defines a cooling-air path between the shroud and the one end wall, the cooling-air path guiding a cooling air blown under pressure from the cooling fan. The air-cooled general-purpose engine includes: an oil pump which pumps up an oil from an oil reservoir; and an oil-supply path which is formed in the one end wall, facing the cooling-air path, of the engine main body, and configured to guide the oil discharged from the oil pump to a valve operating chamber in a head portion of the engine main body, and a jet for jetting the oil is provided in an opening of the oil-supply path, the opening being open to the valve operating chamber.

Abstract: The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine.

Abstract: An engine is disclosed. In one implementation, the engine includes a camwheel mounted to an output shaft. Eighteen cylinder-enclosed pistons are positioned in a circular plane about the camwheel such that the radius of the circular plane and the camwheel are coplanar. Lobes integrally formed on the camwheel define a guiderail including a continuously, substantially sinusoidal surface biased for rotation in the direction of the rotary motion of the output shaft. Drive bearings associated with each piston engage and maintain contact with the guiderail. The rotary motion is obtained by transferring the displacement of the plurality of pistons from respective top dead center positions and bottom dead center positions to the guiderail, thereby rotating the camwheel and output shaft.

Abstract: An engine is disclosed. In one implementation, the engine includes a camwheel mounted to an output shaft. Eighteen cylinder-enclosed pistons are positioned in a circular plane about the camwheel such that the radius of the circular plane and the camwheel are coplanar. Lobes integrally formed on the camwheel define a guiderail including a continuously, substantially sinusoidal surface biased for rotation in the direction of the rotary motion of the output shaft. Drive bearings associated with each piston engage and maintain contact with the guiderail. The rotary motion is obtained by transferring the displacement of the plurality of pistons from respective top dead center positions and bottom dead center positions to the guiderail, thereby rotating the camwheel and output shaft.

Abstract: 90°V12 reciprocating, EFI/DIS fueled/fired, IC engines having a PCM controller operating the engine in an Even Fire ignition mode, in a novel fueling and firing sequence called Progressive Single/Pair (PS/P) firing, wherein the cylinders of each of a set of four pairs of internal cylinders are simultaneously fueled and fired in parallel to produce a pump-gas fueled power curve greatly improved over V6 and V8 engines. The inherent imbalance-induced transitory vibration in IFR RPM is compensated-for by fuel feed control, namely, leaning one cylinder of each pair-fired cylinder pair. The inventive 90°V12 retro-fits into the engine compartment of conventional vehicles and can use any liquid or gaseous fuel. The inventive 90°V12 has use in the exemplary fields of: automotive engines; heavy military and industrial equipment and vehicle engines; marine engines; aircraft engines; and stationary power sources; in both 2-cycle and 4-cycle modes, and in normally aspirated, super-charged and turbo-charged configurations.

Abstract: An engine is disclosed. In one implementation, the engine includes a camwheel mounted to an output shaft. Eighteen cylinder-enclosed pistons are positioned in a circular plane about the camwheel such that the radius of the circular plane and the camwheel are coplanar. Lobes integrally formed on the camwheel define a guiderail including a continuously, substantially sinusoidal surface biased for rotation in the direction of the rotary motion of the output shaft. Drive bearings associated with each piston engage and maintain contact with the guiderail. The rotary motion is obtained by transferring the displacement of the plurality of pistons from respective top dead center positions and bottom dead center positions to the guiderail, thereby rotating the camwheel and output shaft.

Abstract: In a multi-cylinder reciprocating internal combustion engine, an optimal angle of crank arrangement that reduces vibrating force caused in the engine is obtained.

Abstract: Abstract This engine configuration is a crankshaft driven semi-radial piston engine having three banks of three cylinders. It resembles a V-six but has an additional bank of three cylinders centered on a plane dividing the in-line V symmetrically in half through the crankshaft axis. Either outside bank of three cylinders would form a V-six type engine, taken together with the middle bank. The crankshaft has throws at 120 degrees between the nodes with all pistons in a particular in-line bank connected to the crankshaft at a different throw angle. Each cylinder contains one piston that connects to the crankshaft via a typical conecting rod. All pistons in one in-line bank connect to a different node throw angle. Starting with any piston at its TDC position, each 40 degrees will bring a different piston to its TDC position until 360 degrees of crankshaft rotation brings the first back to its TDC position.