Abstract: A gas shuttle valve is for an internal combustion engine, in which a valve plate, as a sealing element, a tubular valve shaft, as a guide element, and a thrust part, which seals the end of the valve shaft opposite to the valve cone, as a stop for a valve operating element having a support for a typical valve spring, are welded to one another. This production method is distinguished by a precisely fitted assembling of these parts to a predetermined length measure, which precedes the permanent bonding of the valve shaft and thrust part.

Abstract: Herein is disclosed a snowmobile with an improved center of gravity. The snowmobile utilizes an oil pan with a bottom portion and a set of side portions that cooperate with the bottom portion to form a sump in which oil collects. The bottom portion may be grooved to permit a steering shaft to pass through the groove, thereby extending from one side of the oil pan to the other side. Optionally the bottom portion is formed to be congruous with a surface of a mechanism, such as a steering shaft, positioned at least partially beneath the oil pan. Furthermore, the oil pan may have a reduced depth.

Abstract: An apparatus for feeding hydrogen into an intake (11) of an engine (1), including: an air inlet (23); a hydrogen inlet (21); a mixing chamber (20) for generating a fuel mixture from hydrogen and air introduced from the inlets, the chamber being adapted to couple to the intake of the engine, for introducing the fuel mixture thereto; and control means (26) for controlling airflow through the mixing chamber. The control means may include an air speed control for varying an effective cross-section of air flow through the apparatus. The air speed control is preferably in the form of an annular collar arranged in the chamber for radial expansion or contraction.

Abstract: A composite lightweight engine poppet valve (10, 110, 210) that has a valve head portion (12, 112, 212) and at least a portion of the stem portion (14, 114, 214) made from a titanium intermetallic material attached by way of a solid state attachment to a nickel base alloy transition piece (16, 116, 216) that is heat treated for high creep resistance. The tip portion (18, 118, 218) made from conventional material is first attached to one end of the transition piece. The transition piece (16, 116,216) is cut to a desired length and then attached preferably by friction welding to the titanium intermetallic stem portion (14, 114, 214) at a preselected distance (d1, d2, or d3). The tip portion (18, 118, 218) made from conventional material is then attached to the other end of the transition piece. In another embodiment, a second hollow stem portion (215) is attached to the transition piece (216) and the tip portion (218) is then attached thereto.

Abstract: A fuel supply apparatus reduces fuel vaporization and leakage the positions of vaporization and leakage and their amount in the fuel tank and the fuel pipe is detected properly in case of using a low boiling point fuel having a vapor phase in the normal temperatures and atmospheric pressures, and the fuel state is controlled based on those detected values. By providing another container made of elastomatic material having an expandable mechanical characteristic inside the fuel storing container, the low boiling point fuel is stored in the separate container. A flow rate controlling apparatus heat or cools the fuel pipe leading the low boiling point fuel stored in the fuel storing container to the engine. A flow rate controlling apparatus adjusts the flow rate of the fuel in the fuel pipe for leading the low boiling point fuel stored in the fuel storing container to the engine.

Abstract: An Elevated Expansion-Ratio Internal Combustion Engine has a substantially standard repeating four-stroke sequence for each cylinder, and the Engine includes for each cylinder: an intake valve, a combustion-gas exhaust valve, and a vapor return valve. A return manifold for vapor connects from the return valves of respective ones of the cylinders back into a passage ahead of a beginning portion of an intake manifold. Substantially during a predetermined part of each compression stroke in the sequence of strokes, the return valve opens after a closing of the intake valve, and thereafter closes at a time within the compression stroke corresponding to a predetermined position of the piston in the cylinder.

Abstract: A cylinder head for a multi-cylinder liquid-cooled internal combustion engine having a cooling chamber configuration adjacent to a fire deck which is divided by an intermediate deck essentially parallel to the fire deck into a lower cooling chamber next to the fire deck and an upper cooling chamber adjoining the lower one in the direction of the cylinder axis, the lower and upper cooling chamber communicating with each other via at least one first transfer opening, where at least one first transfer opening is provided in the area of an opening receiving a preferably centrally disposed fuel injection device, where at least one coolant inlet per cylinder (A,B,C), which is preferably located in the fire deck, opens into the lower cooling chamber, at least one coolant outlet departs from the upper cooling chamber, where a lower cooling chamber is associated with each cylinder (A,B,C), the lower cooling chambers of at least two adjacent cylinders (A,B,C) are essentially separated from each other by a partitioning

Abstract: A manifold anti-rotation system for engines includes a manifold having an end for interfacing with a manifold interface portion of an engine cylinder head, and a mounting collar. The manifold includes a protrusion extending from a periphery of the manifold end. The mounting collar comprises a collar body having a central aperture defined by an aperture wall wherein the aperture receives the manifold end therein. The mounting collar further includes a projection extending from a top surface thereof. The manifold protrusion and the collar projection are positioned to abut one another to prevent the manifold from rotating with respect to the mounting collar beyond the manifold protrusion.

Abstract: Internal combustion engine with a flat plate that is disposed, adjacent a combustion chamber, between a cylinder head and a cylinder, said plate having at least two ports for at least one intake valve and/or one exhaust valve and/or at least one injector device or the like, and being disposed adjacent a flat cylinder head bottom. At least one relief slot is formed in the plate at least between two ports.

Abstract: An oil pan gasket/windage tray for an engine having an engine block and an oil pan is provided and includes a tray adapted for installation between the engine block and the oil pan and the tray having a body with a peripheral flange extending about the periphery of the body and at least one deflector portion extending away from the body to a location spaced away from the peripheral flange. The deflector portion is integrally formed with the body from a single piece of sheet material and a separate peripheral flange portion is provided adjacent to the deflector portion and is affixed to a remainder of the peripheral flange to form the complete gasket flange portion of the oil pan gasket and windage tray system.

Abstract: A cooling apparatus of an internal combustion engine includes an insert that is deformable, and a surface of the insert opposing a cylinder bore wall is close to the cylinder bore wall after the insert is inserted into a water jacket. A cooling apparatus of an internal combustion engine includes a cylinder block having a water jacket in which an insert is disposed; the cylinder block is machined so that a water hole or an aperture having a size corresponding to a size of the insert is formed in the cylinder block and the insert can be inserted into the water jacket through the water hole or the aperture.

Abstract: An internal combustion engine includes a balancer housing, a balancer shaft having an eccentric weight portion and disposed within the balancer housing so as to be parallel with and rotatable in timed relation with a crankshaft, and a power transmitting mechanism that transmits rotation of the crankshaft to the balancer shaft, wherein the balancer shaft has an end portion protruding outward of the balancer housing, and wherein the end portion of the one balancer shaft is partially cut to have a flattened section that constitutes a device for positioning the balancer shaft in a predetermined rotational position. A method of assembling an internal combustion engine with a balancer shaft is also provided.

Abstract: An elastic connecting piece (1) is mounted between a carburetor (4) and an inlet channel (3) of an internal combustion engine (2). The engine (2) is especially an engine of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine or the like. The connecting piece (1) includes a peripherally extending expansion fold (5) arranged between its ends in order to compensate for changes in length. The expansion fold (5) subdivides the connecting piece (1) into a carburetor-end section (6) and into an engine-end section (7). The annular gap (28) of the expansion fold (5) can be bridged by a seal lip (8). The connecting piece (1) includes a peripherally extending seal seat (9) of axial length (g) in the region of the expansion fold (5). The seal lip (8) can be placed in seal-tight contact with the seal seat (9) and substantially closes the expansion fold (5) fluid tight to the interior space of the connecting piece (1).

Abstract: A method of reducing smoke and particulate emissions from an exhaust gas from a compression-ignited reciprocating engine by adding a fuel additive that contains an oil-soluble iron compound and an over-based magnesium compound to liquid petroleum fuel.

Abstract: An air intake system which includes a first member, a second member connected to the first member for forming an air intake passage for introducing an intake air from an upstream mechanism of an engine to cylinders of the engine, a first convex portion provided on either one of the first member or the second member, and a groove portion for forming a clearance by engaging with the convex portion on the other of the second member or the first member. The liquid sealing agent is charged into the clearance.

Abstract: A manifold which when mounted onto an engine block and its associated crankshaft in line with other rotating accessories of an internal combustion engine, provides a more compact and efficient arrangement of such accessories. Also, the apparatus eliminates parts, such as the belt drive and distributor, and greatly improves overall performance.

Abstract: A timing chain cover of an engine, where the engine adjusts the tension of the timing chain by using a tensioner formed with a ratchet bar, comprises a tool insertion hole, where a tool is inserted to loosen the timing chain, thereby separating the camshaft away from the engine without detaching the timing chain cover, obtaining an easy maintenance for the engine.

Abstract: A method for operating an internal combustion engine is provided, such as, for example, in a motor vehicle, in which at least two different fuels are simultaneously supplied to at least one combustion chamber of the internal combustion engine.

Abstract: A thermostatic valve for a coolant circuit of an internal combustion engine, with a housing through which the flow is capable of passing and which has a first throughflow orifice for connection to a first coolant line, a second throughflow orifice for connection to a second coolant line, and a third throughflow orifice for connection to a third coolant line, and with a closure member which is mounted in the housing and which can be adjusted by an actuating unit, the closure member having a first shut-off element for shutting off the first throughflow orifice and a second shut-off element, coupled to the first shut-off element, for shutting off the second throughflow orifice.

Abstract: An engine intake system including an air cleaner with an intake noise-damping box. The system is easily switchable from a noise-damping state to a non-noise-damping state when high output of the engine is regarded as important. The intake noise-damping box is attached to one side wall of an air cleaner. It is formed by a substantially rectangular air intake frame, the inside of which functions as an air intake open to the inside and the outside of the air cleaner. A passage former can be attached and detached to/from the air intake frame. When attached, the passage former forms an air passage extending in the longitudinal direction of the air intake frame, and communicating with the inside and the outside of the air intake frame at the air intake.