Abstract: A rotary valve includes a rotor housing having a first centrally-located aperture extending axially through the rotor housing, an inlet port, and an outlet port. The inlet port and the outlet port each extend radially and open into the first centrally-located aperture. The rotary valve further includes a rotor to be disposed within the first centrally-located aperture. The rotor includes a main body and a dwell space extending radially inwardly into the main body and circumferentially around a portion of the main body. The rotor further includes a second centrally-located aperture that extends axially through a distal end of the rotor and into the dwell space within the main body.

Abstract: An engine with a rotating valve assembly is disclosed. The valve assembly including a housing having an internal cavity, an open top, and an open bottom, the open top and open bottom being in fluid communication with the internal cavity; a valve barrel positioned in the internal cavity and adapted for rotation therein, the valve barrel having an annular peripheral surface and an aperture extending transversely therethrough communicating with the peripheral surface on opposite sides; a first seal assembly positioned in the open top and a second seal assembly positioned in the open bottom, the first and second seal assemblies each include a seal having a sealing surface in mating engagement with the peripheral surface and an aperture extending therethrough.

Abstract: An internal combustion engine includes: a cylinder block in which a cylinder is formed; a cylinder head including an intake port and an exhaust port, the cylinder head being integrally formed with the cylinder block; a water jacket covering circumferences of the cylinder, the intake port, and the exhaust port; a partition wall dividing the water jacket into a cylinder block side and a cylinder head side; and a knock sensor mounting boss provided on a side surface of the internal combustion engine, at a position on an extension line of the partition wall.

Abstract: A rotary valve internal combustion engine has a piston connected to a crankshaft and reciprocatable in a cylinder, a combustion chamber being defined in part by the piston, and a rotary valve rotatable in a valve housing fixed relative to the cylinder, the rotary valve having a valve body containing a volume defining, in part, the combustion chamber and further having a port giving, during rotation of the valve, fluid communication successively to and from the combustion chamber via inlet and exhaust ports.

Abstract: Multi-section sleeve valves for internal combustion engines for improved aspiration. An open connecting rod section is separated from an internal, tubular passageway by a closed wall. A port section proximate the wall defines valve ports. A power stroke midsection borders the port section. An oiling section borders the midsection, and an open section adjacent the oiling section is in fluid flow communication with the tubular passageway. The lower-diameter midsection forms a relief annulus between the valve and the tunnel or sleeve in which the valve is disposed. Fluid flow occurs through the valve interior and through ports dynamically positioned above the compression cylinder, proximate aligned sleeve and head ports. Sleeve ports are separated by bridges that maintain valve rings in compression during reciprocation to prevent damage. High pressure gas is confined between axially spaced apart, stepped sealing rings that prevent gases from flowing axially about the valve exterior.

Abstract: An exhaust control device for a vehicle engine includes an exhaust control valve capable of changing the opening area of an exhaust passage. The exhaust control valve is disposed in exhaust passage forming means so as to be able to change a bent-internal side partial passage sectional area of the passage sectional area of an exhaust passage. Specifically the exhaust control valve is disposed at a bent portion of the exhaust passage that is closest to an exhaust valve port. With this configuration, the exhaust flow rate can be controlled satisfactorily.

Abstract: A two-cycle dry-sump fuel-injected engine includes a cylinder block with piston bores that step up substantially in diameter between the top of each cylinder and the bottom. A matching piston similarly steps in its outside diameter with a larger diameter lower skirt having an oil seal ring. A narrower diameter of the piston involves the top better part of its length. A jacket chamber all around the piston changes in volume as the piston travels. A combustion chamber has an exhaust valve and a fuel injector. The jacket chamber provides a pump for an oil mist and air lubrication system. Fresh air is drawn into the crankcase. When the piston moves all the way down, the fresh air is compressed by the larger displacement volume of the larger diameter piston skirt and transferred through to a smaller displacement volume of the upper piston to completely scavenge the exhaust.

Abstract: A cylinder head for an internal combustion engine is disclosed. The cylinder head includes a one piece main body having at least one internal chamber shaped to accommodate at least one rotary valve. At least one first passage extends between the internal chamber and an underside of the main body. A second passage provides communication between the internal chamber and the exterior of the main body and is shaped to allow insertion of a rotary valve therethrough.

Abstract: A cylinder head arrangement is provided. The arrangement may include a cylinder head having at least one valve chamber defined therein. The arrangement may also include at least one rotary valve, accommodated in the valve chamber, the rotary valve having a curved portion, two side portions and at least one flow passage intersecting the curved portion and at least one of the side portions, and thereby defining flow openings in the curved portion and two side portions. In addition, the arrangement may also include at least one deflector arranged adjacent at least one side portion of the rotary valve in which a flow opening is defined.

Abstract: We present a high-efficiency crankless reciprocating steam engine that loses only a small amount of energy when the rectilinear motion of its piston is changed into the rotary motion of its driveshaft. The present invention continuously rotates a valve in one direction while alternately introducing steam into two piston housing chambers to generate the rotary force of the driveshaft. Therefore, engine efficiency is greatly increased because the inertial force losses in the valve are much smaller compared to the case when the valve rotation stops or changes direction.

Abstract: Novel rotary valve assemblies and valve components for use with an internal combustion engine are disclosed. Valve seal assembly anchors are also described. Selected valve port geometries and axial adjustment for variable valve area for desired engine efficiency and performance are described. Novel seal assemblies and arrangements for sealing and heat transfer are also described.

Abstract: An axial flow rotary valve (1) for an internal combustion engine comprising a cylinder head (10) having a bore in which an axial flow rotary valve (1) rotates. The valve having a cylindrical centre portion (4), and an inlet and an exhaust port (2, 3) terminating as openings (7, 8) in the centre portion, the openings periodically communicating with a combustion chamber (23) through a window (15) in the bore. The clearance between the centre portion and the bore being sealed by an array of floating seals comprising at least two axial seals (16a, 16b) spaced apart on opposite sides of the window. The assembly further comprising at least one floating axially extending masking seal (5) being disposed outside the window and circumferentially remote from the axial seals.

Abstract: Rotary valve system for controlling communication with a port in an internal combustion engine which, in one disclosed embodiment, has a crankshaft, compression and expansion pistons connected to the crankshaft for reciprocating movement within compression and expansion chambers, a combustion chamber in which air from the compression chamber is combined with fuel and burned to produce an increased gas volume.

Abstract: An axial flow rotary valve (1) for an engine, the valve rotatable about an axis (12). The valve having an inlet port (2) extending from an axial opening (5) and terminating as a peripheral opening (7). The port having a throat (22), with a cross sectional area at least 2% less than the axial opening, at a distance of at least 0.2 times the length of the peripheral opening from the end of the peripheral opening closest to the axial opening, and a port floor (19) extending from the first end to the axial opening. The port having a port floor profile (37) generated by the intersection of the port floor with any plane coincident with the axis intersecting the port floor wherein the angle (?) between the tangent to the profile and the axis is less than 60 degrees over at least 75% of the length of the profile.

Abstract: A valve system for a combustion engine that includes at least one combustion chamber is disclosed. The combustion chamber includes an intake port and an exhaust port. The valve system includes cylindrical valve shaft, the cylindrical valve shaft having a cylindrical surface, a central axis along the cylindrical valve shaft and containing at least two recessed areas, the recessed areas being at one hundred eighty degrees to one another along the axis of the valve shaft, the recessed areas extending approximately ninety degrees about the axis and along the cylindrical surface, or about 25 percent of the surface.

Abstract: A spherical rotary engine valve assembly for use in an internal combustion engine.

Abstract: The HELI-SHAFT intake exhaust manifold system is comprised of a shaft with two helical and parallel runners cutout around its length. Surrounding the shaft is a sleeve of the same length to enclose and separate the two runners. The intake runner has an opening at the front end of the shaft to provide an inlet for the air/fuel mixture to enter from the intake plenum. Exhaust gases exit the rear of the shaft through the exhaust opening; thus allowing the air/fuel mixture and exhaust gases to travel through the sleeved shaft following the runners in a parallel path. The shaft also provides locations for spark plugs to be inserted. The sleeve contains port openings located over each intake and exhaust runner positioned to provide alignment during rotation with individual combustion chambers aligned in a row matching both the firing order and cycle timing of the engine.

Abstract: A valve system for a combustion engine that includes at least one combustion chamber is disclosed. The combustion chamber includes an intake port and an exhaust port. The valve system includes cylindrical valve shaft, the cylindrical valve shaft having a cylindrical surface, a central axis along the cylindrical valve shaft and containing at least two recessed areas, the recessed areas being at one hundred eighty degrees to one another along the axis of the valve shaft, the recessed areas extending approximately ninety degrees about the axis and along the cylindrical surface, or about 25 percent of the surface.

Abstract: A rotary valve internal combustion engine comprising a crankshaft, a throttle (23), a throttle actuator, a cylinder head (7), a combustion chamber (8), and at least one rotary valve (1). The rotary valve (1) having at least two ports (2, 3) terminating as openings (4, 5) in its periphery, the cylinder head (7) having a bore (11) in which the rotary valve (1) rotates, a window (6) in the bore (11) communicating with the combustion chamber (8), the openings (4, 5) successively aligning with the window (6) by virtue of the rotation, a drive mechanism comprising a phase change means (18), the drive mechanism driving the rotary valve (1). The at least two ports (2, 3) comprise an inlet port (2) and an exhaust port (3), and the phase change means (18) applies a phase change in response to changes in the operating conditions of the engine over at least one engine cycle.

Abstract: A variable valve timing mechanism for an internal combustion engine comprising at least one rotary valve (1) having at least two ports terminating as openings (2, 3) in its periphery, a cylinder head (7) having a bore in which the rotary valve (1) rotates, and a window (6) in the bore communicating with a combustion chamber (8). The openings (2, 3) successively align with the window (6) by virtue of the rotation. The mechanism also comprises a drive mechanism (13) driving the rotary valve (1). The at least two ports (2, 3) of the rotary valve (1) are an inlet port and an exhaust port. The drive mechanism (13) varies the angular velocity of the rotary valve (1) at least within a portion of at least one engine cycle while maintaining an average angular velocity over the at least one engine cycle that has a fixed relation to the average angular velocity of crankshaft over the at least one cycle.

Abstract: A spherical rotary engine valve assembly for use in an internal combustion engine.

Abstract: The invention aims to provide a compact four-stroke engine with rotary valve control and petroil lubrication which has a simplified construction and allows the engine to be used in any position as a result of an improved lubrication system. To this end, the carburetor is directly connected to the inlet opening and the rotary valve is configured in such a way that in a first position it connects the carburetor to the combustion chamber, in a second position it connects the carburetor to the cylinder chamber/crankcase via the overflow conduit and in a third position it connect the cylinder chamber/crankcase to the combustion chamber via the overflow conduit and the combustion chamber to the outlet opening via the conduit. Said rotary valve is in continuous motion during the operation of the combustion engine and the first, second and third positions only occur at corresponding defined moments.

Abstract: A rotary valve assembly for an internal combustion engine includes a rotatable tubular valve body having a pair of diametrically opposed fluid flow holes that are intermittently aligned with the intake and inlet port of the cylinder as the body rotates. The valve assembly is consequently closed and generally blocks fluid flow to the cylinder when the holes of the valve body are not aligned with the intake and inlet port. The valve assembly includes a valve timing adjuster for permitting selective adjustment of the time during which the valve is open. The timing adjuster includes an inner cylindrical core and an intermediate sleeve positioned concentrically between the core and valve body. The core has a diametrically extending flow-through opening and the intermediate sleeve has a pair of diametrically opposed apertures. The engine is preferably provided with a similar rotary valve assembly in the exhaust. A unique rotary valve seal is also disclosed.

Abstract: A variable valve timing mechanism for an internal combustion engine comprising at least one rotary valve (1) having at least two ports terminating as openings (2, 3) in its periphery, a cylinder head (7) having a bore in which the rotary valve (1) rotates, and a window (6) in the bore communicating with a combustion chamber (8). The openings (2, 3) successively align with the window (6) by virtue of the rotation. The mechanism also comprises a drive mechanism (13) driving the rotary valve (1). The at least two ports (2, 3) of the rotary valve (1) are an inlet port and an exhaust port. The drive mechanism (13) varies the angular velocity of the rotary valve (1) at least within a portion of at least one engine cycle whilst maintaining an average angular velocity over the at least one engine cycle that has a fixed relation to the average angular velocity of crankshaft over the at least one cycle.

Abstract: A rotary valve assembly for an internal combustion engine includes a rotatable tubular valve body having a pair of diametrically opposed fluid flow holes that are intermittently aligned with the intake and inlet port of the cylinder as the body rotates. The valve assembly is consequently closed and generally blocks fluid flow to the cylinder when the holes of the valve body are not aligned with the intake and inlet port. The valve assembly includes a valve timing adjuster for permitting selective adjustment of the time during which the valve is open. The timing adjuster includes an inner cylindrical core and an intermediate sleeve positioned concentrically between the core and valve body. The core has a diametrically extending flow-through opening and the intermediate sleeve has a pair of diametrically opposed apertures. The engine is preferably provided with a similar rotary valve assembly in the exhaust. A unique rotary valve seal is also disclosed.

Abstract: A rotating shaft and a drive shaft are used in an air intake apparatus for an internal combustion engine. At one end portion of the rotating shaft and the drive shaft a sphere portion and a projection portion are formed, and another end portion of the rotating shaft and the drive shaft a cup portion and a faucet portion are formed. The sphere portion is inserted to the cup portion and further the projection portion is engaged with the faucet portion, thereby a universal joint is formed. Since a connection structure between the rotating shaft and the drive shaft is constituted with few component elements, a cost reduction in the air intake apparatus for the internal combustion engine can be improved.

Abstract: A rotary valve assembly for an internal combustion engine is herein disclosed. The rotary valve assembly comprises a valve body having a number of ports formed therethrough and a bore that intersects these ports such that a valve cylinder inserted into the bore may selectively occlude or open the ports of the valve body. Cutouts formed into the valve cylinder facilitate the opening of the ports as they are rotated into alignment with the ports of the valve body. The rotary valve assembly may be used as a throttle mechanism by sliding the valve cylinder longitudinally within the bore of the valve body so as to control the aspect of the cutouts or bores formed into the valve cylinder that is presented to the ports.

Abstract: A rotary valve assembly for an internal combustion engine includes a rotatable tubular valve body having a pair of diametrically opposed fluid flow holes that are intermittently aligned with the intake and inlet port of the cylinder as the body rotates. The valve assembly is consequently closed and generally blocks fluid flow to the cylinder when the holes of the valve body are not aligned with the intake and inlet port. The valve assembly includes a valve timing adjuster for permitting selective adjustment of the time during which the valve is open. The timing adjuster includes an inner cylindrical core and an intermediate sleeve positioned concentrically between the core and valve body. The core has a diametrically extending flow-through opening and the intermediate sleeve has a pair of diametrically opposed apertures. The engine is preferably provided with a similar rotary valve assembly in the exhaust. A unique rotary valve seal is also disclosed.

Abstract: The invention refers to a valve device for a combustion engine which includes a combustion chamber (1) and at least one channel (5) for communication between the combustion chamber (1) and an external space. The valve device includes a rotatable valve body (13), which is provided in said channel (5) and includes a passage (14) extending in a direction through said valve body (13). The valve body (13), which is rotatable around an axis of rotation forming an angle to the direction (p) of said passage (14), is arranged to open and close, respectively, said channel (5) by means of said passage (14) by rotation, a rotary motor (16) separated from the combustion engine is provided.

Abstract: An overhead rotary valve fitted into a cylinder head with diametrical polygonal openings formed therein for use in combination with an internal combustion engine, driven to bring intake and exhaust ports into and out of alignment with passages leading to and from the combustion chamber. Sleeve bearings are fitted in the cylinder head that provide surface sealing, and annular sealing members prevent the air/fuel mixture or exhaust gases from flowing into regions intermediate ports and individual cylinders. Utilizing this overhead rotary valve and associated seals and bearings increases the efficiency and performance of an internal combustion engine. The overhead rotary valve rotating, at one quarter the speed of the crankshaft, minimizes wear and noise levels, self cleans the ports, allows the engine to operate at higher rpm and imparts proper opening and closing of passages at the proper sequence of valve timing without concern of valve float.

Abstract: A complete rotary valve assembly and system is disclosed. The rotary valve includes a generally elongated valve body having first and second ends and a longitudinally extending axis of rotation. The rotary valve is mounted in a housing positioned above a head port of an engine. The rotary valve includes an intake port and an exhaust port defined by a valve body arranged for periodic communication with the head port and combustion chamber as the valve rotates along the axis of rotation. The rotary valve system of the present invention includes a secondary intake port for controlling the flow of intake gases into the rotary valve, a fuel injection system, an improved sealing system, a bifurcated valve body with separated intake and exhaust passages, a cooling and reduced emissions gas exhaust control system, and an adjustable throttle control.

Abstract: The invention relates to an operating method of an internal combustion engine. According to the method, a fuel-air mixture is rapidly combusted in order to move a piston. The fuel contained in or introduced into an occluded fresh gas is evaporated in the fresh gas, which has already been sucked into a cylinder chamber and then compressed. The fuel is then combusted and the piston is subjected to the pressure produced by the combustion gases (working cycle). After performing its working cycle, the piston ejects the waste gases from the cylinder chamber. The aim of the invention is to improve the efficiency of the internal combustion engine. To this end, the fresh gas that is compressed during the compression cycle is pressed into a first combustion chamber. The aforementioned evaporation process is then carried out in the first combustion chamber once it has been sealed off from the cylinder chamber.

Abstract: A complete rotary valve assembly and system is disclosed. The rotary valve includes a generally elongated valve body having first and second ends and a longitudinally extending axis of rotation. The rotary valve is mounted in a housing positioned above a head port of an engine. The rotary valve includes an intake port and an exhaust port defined by a valve body arranged for periodic communication with the head port and combustion chamber as the valve rotates along the axis of rotation. The rotary valve system of the present invention includes a secondary intake port for controlling the flow of intake gases into the rotary valve, a fuel injection system, an improved sealing system, a bifurcated valve body with separated intake and exhaust passages, a cooling and reduced emissions gas exhaust control system, and an adjustable throttle control.

Abstract: A rotary valve for an internal combustion engine includes a cylindrical valve rotor having an inlet and an outlet port arranged in the circumferential surface thereof, and a plurality of sealing elements mounted on the valve rotor such as to subdivide the circumferential surface of the rotor body to define discrete circumferential surface zones thereon, a predetermined one of the discrete surface zones being arranged such that, when the rotary valve is received within a valve bore in a cylinder head of an engine and the sealing elements of the rotary valve abut on the valve bore surface, it periodically seals-off a transfer port in the cylinder head, for which the rotary valve serves as closing and opening, during at least part of the compression and combustion strokes performed in the engine, whereby air-fuel mixture compressed during the compression stroke and combustion gases created during combustion stroke are substantially prevented from passing into the inlet or outlet port of the valve during these st

Abstract: A valve system designed for use in an internal combustion engine to regulate the flow of working fluids including air/fuel mixtures and exhaust gases to and from a cylinder comprising an intake valve and an exhaust valve. At least one but preferably both of the intake and exhaust valves comprise a shutter valve, defined by a plurality of valve elements in the form of partially overlapping valve blades slidable relative to one another and defining a central aperture having an adjustable dimension dependent upon the relative positioning of the plurality of valve elements as they are selectively oriented between an open position and a closed position. The central aperture at least partially defines a free, unobstructed flow path of fluid passing into or out of the combustion chamber before and after the ignition of the air/fuel mixture.