Abstract: A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder.

Abstract: A twin vertical bank hybrid internal combustion H-engine system; an assembly having an engine block with parallel left side and right side vertical inline piston banks, each having a crankshaft and pistons, a cylinder head, and individual fuel feeds operable on a first and second fuel type respectively. Each piston bank operates independently of the other but is housed within the same engine block and has separate lubrication systems. An operator selects which engine to run based on fuel availability, convenience, or lower cost of a certain fuel type. The chosen engine is mechanically or electrically selected via an engine bank selector box using a selector control which selects the fuel type and engages a drive gear on the crankshaft of the selected engine, and transfers power to the transmission. The selector control actuates a transfer system that prevents simultaneous operation of both engines.

Abstract: The engine includes a cylinder; a first piston and a second piston that reciprocate in the cylinder wherein the first piston has a first end piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end; wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a power output shaft; and a second connecting rod connected to the second piston rod and coupled to the power output shaft. The first and second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston.

Abstract: A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly.

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: A dual crankshaft internal combustion engine having two rotating offset crankshafts respectively attached to connecting rods. Each of the connecting rods, in turn, are pivotally attached to piston rods, which are located an equidistance between the crankshafts. The piston rods are attached to a piston reciprocally disposed in a cylinder. The crankshafts are aligned in parallel and are geared together, either directly or indirectly, thus causing the crankshafts to rotate in the same or opposite directions, depending upon the linkage gear configuration. The dual crankshaft internal combustion engine utilizes leverage from the wedge-effect of the offset crankshafts to provide increased torque, power duration and fuel efficiency.

Abstract: A heat engine employs an auxiliary cylinder to receiving exhaust gases from a main cylinder during its exhaust phase to extract mechanical energy from the heat in the exhaust gases. The auxiliary cylinder has an auxiliary piston that reciprocates with an asymmetric pattern in respect to the main crank a counter-rotating auxiliary cranks such that the downward stroke of the auxiliary piston and the upward stroke of the auxiliary piston correspond to crank angles above and below 180 degrees. In one favorable embodiment, fresh air can be drawn in and combined with the exhaust gases.

Abstract: A piston for a piston-cylinder unit, the piston including two pivot bearings for pivotably supporting two connecting rods at the piston about two connecting rod pivot two connecting rod pivot axes extending in parallel to one another and laterally offset from one another; the two pivot bearings provided at a bearing element which is pivotably supported about a bearing element pivot axis at the piston; and the bearing element pivot axis extending parallel to the two connecting rod pivot axes.

Abstract: A variable displacement engine comprises two engine modules fed from a common fuel source, each engine module having an individual crankshaft. The first engine module has a high compression ratio (e.g., greater than 13:1), while the second module has a typical compression ratio for a gasoline engine (e.g., between 9:1 and 11:1). In one embodiment, the first engine module operates through high efficiency optimized alcohol fuel combustion when the fuel content exceeds a minimum alcohol content. In an alternative embodiment, the first engine module operates at high efficiency through gasoline HCCI combustion when conditions permit. When operating conditions do not permit the first engine module to operate at high efficiency, the second engine module operates as the primary engine module, with the first engine module available to provide supplemental power (at less than optimal efficiency) if needed to meet driver demand.

Abstract: Engine output takeout device includes: a first crank gear mounted on a first crankshaft; a second crank gear mounted on a second crankshaft; a ring gear surrounding the first and second crank gears and having inner teeth meshing with the first crank gear; and an idler gear rotatably mounted coaxially on the first crankshaft via bearings and meshing at its one position with the second crank gear and at its other position with the inner teeth of the ring gear, the first crank gear and the idler gear both meshing with a same inner tooth of the ring gear at any given time.

Abstract: An internal combustion engine wherein a combustion chamber is formed by moveably fitting a bottomed tubular moveable sleeve on a stationary piston in which a valve mechanism is incorporated, and the moveable sleeve is connected to a crankshaft via a connecting rod.

Abstract: A piston engine which has at least one dry-running piston-cylinder unit. It has a first housing (1), at least one cylinder arranged in or on the first housing (1) in which a piston is reciprocably arranged. The piston-cylinder unit further has a first crankshaft (4) and a second crankshaft (5), the first and second crankshafts (4, 5) being arranged parallel to each other and synchronously rotating in opposite directions. The axes of rotation (X, X?) of the crankshafts (4, 5) are arranged parallel to a center plane (Z) of the cylinder, and they are laterally offset relative thereto. First and second piston rods (6, 7) are pivotally connected to piston (3). The first piston rod (6) has a first end pivotally connected to piston (3) and a second end connected to a crank pin (40) of the first crankshaft (4). The second piston rod (7) has a first end that is pivotally connected to piston (3) and a second end that is pivotally connected to a crank pin (50) of the second crankshaft (5).

Abstract: A line of small internal combustion engines, including twin cylinder engines and single cylinder engines. The engines each include a crankcase, and one or more cylinder members attached to the crankcase, the cylinder members being separate components from the crankcase. A number of different crankcases are provided for various types of single and two cylinder engines, the crankcases having common mounting structure to which the cylinder members may be attached. Thus, the manner in which the cylinder members are attached to the crankcases is the same for each of the different types of crankcases. Two different types of cylinder members are provided, one having a side valve or “L-head” valve train, and the other having an overhead cam (“OHV”) valve train. The cylinder members are therefore modular components which may be selectively used in a variety of different types of engines.

Abstract: A four cycle outboard internal combustion engine for driving a watercraft with a cylinder housing having cylinders arranged in at least two rows, wherein a piston is reciprocating in each cylinder, the pistons driving an approximately horizontally accommodated propeller drive shaft by way of an approximately vertically arranged crankshaft, each cylinder bank being provided with cylinder head sealing surfaces for a cylinder head housing receiving gas shuttle valves and wherein the cylinder head sealing surfaces of all of the cylinders are arranged in one single cylinder head sealing plane and an exhaust main manifold for all of the cylinders is arranged approximately parallel to the crank shaft in the cylinder head housing in the area of a central plane of the motor which is configured parallel to the crankshaft. One crankshaft is provided for each cylinder bank, the crankshafts having a stable relative speed ratio and acting upon the propeller drive shaft through a common jackshaft.