Abstract: A rotary valve assembly for an internal combustion engine characterized in that the valve has a combination of axial sealing elements (21,22) and inner circumferential sealing elements (23,24) arranged to form a first seal pressurizing cavity extending circumferentially between the axial sealing elements (21,22) and two second seal pressurizing cavities each lying between the inner (23,24) and adjacent outer (25,26) circumferential sealing elements axially on each side of a window opening in a cylinder head (16) in which the valve rotates, the arrangement being such as to permit high pressure combustion gas to pass from the first cavity to the two second cavities whereby curing combustion the outer circumferential sealing elements (25,26) are caused to seal the second pressurizing cavities by being forced against the axially outermost sides of circumferentially extending grooves (36,37) in which they are located to prevent axially outward movement of gas, and the inner circumferential sealing elements (23,24)

Abstract: An engine having an engine block defining at least two cylinders having respective cylinder heads. Pistons are reciprocal within respective ones of the cylinders. The cylinders have respective fuel inlet ports and exhaust ports and two of said cylinders have an idle relief port disposed between their respective exhaust port and head ends. The idle relief ports of the cylinders are interconnected by a passageway for providing communication between the idle relief ports of said at least two cylinders. This has been found to provide reduced pull start resistance, reduced engine vibration during idle, and significantly reduced horsepower loss over a wide operating range which horsepower loss is normally associated with idle prior art relief structures which vent directly from idle relief ports to atmosphere.

Abstract: A hand-held tool such as a chain saw has a housing and a combustion engine enclosed in the housing. The working tool is driven by the combustion engine. An air filter box has a filter element for dividing the filter box into a dirt room and a clean room. The air filter box is closed off by a lid. A suction channel connects the clean room to the combustion engine. An air inlet channel for guiding dirt-laden air into the dirt room of the air filter box is provided. The air inlet channel extends substantially straight and upwardly. A suction tube is connected to the suction channel and projects into the clean room for extending the suction channel. The air inlet channel is located in the lid and extends substantially transverse to the suction tube.

Abstract: The combustion chamber of an engine is formed in a double insulation structure where partially stabilized zirconia (PSZ) material having a low thermal conductivity is disposed between two walls for thermal installation. The double insulation structure has a head liner made of a silicon nitride material and an outer tubing which are separated by a space. A plurality of gaskets, i.e. the PSZ materials, are arranged in the space, with each having a PSZ thermal insulator 31 sandwiched between two contact claddings made of stainless steel or copper. The escape of heat from the head liner is minimized by the PSZ material, having a lower thermal conductivity, thereby increasing a thermal insulation quality of the combustion chamber.

Abstract: A universal internal combustion engine that is electronically and reversibly convertible from four stroke operation to two stroke operation, the engine having intake and exhaust valves with an electro-hydraulic actuator system for actuating the valves in accordance with electronic control signals from an electronic control module, the electro-hydraulic actuator system having an electronic actuator for each valve coupled to a slide valve for discrete supply of a pressurized hydraulic fluid to a hydraulic piston for each valve, the electronic control module having a program for independent activation of each electronic actuator for select operation of each intake and exhaust valve at any time during the operating cycle.

Abstract: A device for damping torsional vibrations in a drive train of a traction drive connecting an internal combustion piston engine and an auxiliary unit, comprising an overrunning clutch (5,30,48) arranged between a driving pulley (2,25,42) and an input shaft (1) of the auxiliary unit or between a crankshaft and a driven pulley of the internal combustion piston engine, characterized in that the overrunning clutch (5,30,48) comprises an inner or outer ring (8,9,28,29,50) made of sheet metal without chip removal on which locking ramps cooperating with locking rollers (10,30a,48a) are formed, and the inner or outer ring (8,9,28,29,50) extends at least on one side beyond a region of the locking ramps to form a raceway for a rolling bearing (6,7,31,32,45,49).

Abstract: Using a centrifugation effect, the fresh air introduced to the working chamber (1) of the engine is prevented from mixing with the combustion gases intentionally retained in the latter from one cycle to the next. The means for introducing pressurised fuel (10) are arranged so as to inject the fuel directly into the central zone (G) of the chamber (1) where the concentration of the retained combustion gases and the temperature are thus made maximal, which makes it possible to reduce the ignition delay of the fuel.

Abstract: A highly pressurized internal combustion engine, wherein arrangements to balance the intake flow of air that passes from the turbochargers to a windchest, through spring valves to compressor cylinders, that force the charge into a pressure chamber to supply an equally divided amount of charge air to the power cylinder ports that are controlled by the movements of the power pistons, with provisions to cool the air charge within the engine block coolant jacket. The bottom of the compressor pistons are employed to pump oil mist into and out of the bottom of the compressor cylinders to cool and lubricate the power pistons. A simple oil cooler surrounds the engine shaft where it passes through the cylinder block coolant jacket.

Abstract: An induction system for a V-type engine that permits a compact engine configuration and the tuning of two different intake passages for each cylinder for different engine speed ranges. The shorter high-speed intake passages are served by the plenum chamber adjacent the cylinder bank while some of the other intake passages are served by the adjacent plenum chamber and others are served by the other plenum chamber.

Abstract: The invention relates to an engine for an aircraft. The engine includes an engine housing having a drive shaft and a power output shaft. The power output shaft and the drive shaft are separately journalled within the engine housing. The power output shaft includes a propeller at a front end for providing propulsive thrust for the aircraft. The aft end of the power output shaft extends aft of the engine housing. The drive shaft is rotatably coupled to the aft end of the power output shaft by a gear train located outside and aft of the engine housing. The engine provides bearings which solidly support the power output shaft over a substantial portion of its length. This arrangement significantly reduces the loads which would be applied to the drive shaft and other engine components, and therefore, increases the service life of these components.

Abstract: A ring for protecting the edge of a combustion bowl disposed within a top surface of a light-alloy piston for a diesel engine. The ring is made of fine-grain carbon and serves as bowl edge armor. The ring is galvanically coated before being bonded to the remainder of the piston. The exterior surface of the bowl edge armor is coated with an antioxidation compound.

Abstract: An electrically operated EGR valve has a pintle for opening and closing the valve. The pintle is actuated by an linear actuator to open and close two ports which are connected to the outlet of the valve. The pintle has a frustoconical surface which mates with the two ports. The input passageway to the EGR valve is in fluid communication with both sides of the pintle which are the sides taken in direction of the movement of the linear actuator. The pintle being pressure-balanced when the electrically operated linear actuator attempts to move the pintle to either further open or further close the ports, the pintle is more responsive without increasing the size of the actuator.

Abstract: A rotary valve (10) of an internal combustion engine, of the hollow cylindrical type for rotation in the bore (20) of the cylinder head of the engine, the valve (10) having oil and gas seals (17,14) to prevent leakage of oil to the combustion chamber and leakage of gas from the combustion chamber, each gas seal being of the piston ring type and each oil seal consisting of a non-rotating annular member (17), a seal (21) between it and the bore in which the valve (10) rotates, an annular cavity (24) lying peripherally in a small radial clearance between the valve (10) and the bore (20) and extending between the gas sealing ring (14) and the seal (21) on the annular member (17), the annular member (17) having a substantially radially disposed face (18) arranged to seal slidingly against a radially disposed face (19) on the valve (10), the quality of these faces (18,19) being such as to allow migration of oil between them but sufficient when combined with the radial depth of the faces (18,19) to prevent oil from

Abstract: An internal-combustion engine having a main cylinder, a crosshead motor piston mounted on a piston rod, and a charger piston, which reciprocates below the motor piston and has a hole for the piston rod to slide through, is shown in full section in FIG. 1. The piston rod is connected through a motor connecting rod to a short-throw motor crankpin that separates a pair of long-throw charger crankpins that follow it by eight degrees and are connected through a pair of charger connecting rods to the charger piston. The pistons separate as they descend thereby opening a charger cavity wherein a fuel-air charge is drawn via intake ports through the main-cylinder wall. As the pistons rise, the intake ports are blocked; the charge is compressed and forced upward past the motor piston into a hot combustion chamber through transfer channels along the main-cylinder wall that remain blocked by the motor piston until it approaches its zenith.

Abstract: A device for the separating of oil and/or soot from a stream of air, gas and/or vapor, particularly for combustion engines, characterized by at least one drum which is arranged in a closed chamber and can be driven in rotation by a drive around a longitudinal axis or drum axis, the drum forming an inner space and a plurality of openings being provided in screen-like manner on a part of its wall which surrounds the axis of the drum and limits the inner space, through which openings the individual spaces formed by the inner space of the drum and the part of the chamber surrounding the drum are in communication, by at least one first connection debouching into on of the individual spaces for the feeding of the stream of air, gas and/or vapor, and by a second connection debouching into the other individual space for the discharge of a purified stream of air, gas and/or vapor and/or of a stream of air, gas and/or vapor which has been freed from oil and/or soot.

Abstract: A number of embodiments of induction system for fuel injected outboard motors. In each embodiment the fuel injectors are bounded on at least two sides by the induction system so that the airflow through the induction system will cool the fuel injectors.

Abstract: A rotary valve (10) for an internal combustion engine, of the hollow cylindrical type, having one or more openings (14) arranged to pass periodically over a window in the cylinder head bore, characterized in that the valve (10) also incorporates at least one tongue (34) projecting from the axially central point of the leading edge of at least one of the openings (14), the external surface of the tongue (34) having the same profile as the outer cylindrical surface (35) of the valve (10), the tongue (34) extending from the leading edge (24) of the opening (14) to an extent sufficient to support the center of an axially extending seal during that period when the leading edge (24) of the opening (14) crosses such seal.

Abstract: A tabulated kinematic control theory provides a foundation for a variety of peristaltic motion control versions where a control stator establishes a reference line for a peristaltic control wave or path in few different ways for the purpose of making a control point on a differential linkage or gear to follow this control path which in turn is creating an alternating harmonic-motion-like accelerating and decelerating rotary motion to a pair of concentric rotor shafts which are attached to vane carriers with one or more vanes each.

Abstract: A dynamic gas seal for an internal combustion engine reduces exhaust emissions by minimizing the amount of hydrocarbon-laden air from the engine breather that enters the combustion chamber through the open intake valve. The dynamic gas seal includes several channels which allow filtered air at atmospheric pressure to enter the combustion chamber in place of oil-laden air from the breather. The dynamic gas seal includes a channel between the air filter and the intake valve system, and channels between the breather exit and the carburetor intake.

Abstract: A regenerative internal combustion engine (10) is provided that includes a regenerator (65) that is capable of preheating a charge of compressed air, while not causing premature combustion of fuel. The regenerator (65), in combination with a catalyst (75), also ignites residual amounts of combustible material in exhaust gases. The catalyst (75) itself is capable of oxidizing fuel in a combustion cylinder (50) once stable combustion is achieved.