Abstract: A connecting rod for a two-cycle internal combustion engine that is composed of a hypereutectic aluminum-silicon alloy containing more than 12% silicon. The alloy contains precipitated particles of silicon having an average particle size less than 50 microns. In contrast to a hypoeutectic aluminum silicon alloy containing less than 12% silicon, the hypereutectic aluminum-silicon alloy has an endurance limit, so that at stresses below about 15,000 psi there will be no failure of the alloy at multiple cycles, making the alloy suitable for use as a connecting rod in a two-cycle engine, which is only subjected to compressive stress in service.

Abstract: An engine E of an outboard motor O includes a carburettor 29 at an upstream end of an intake manifold 28, and an air intake 30 is detachably fixed to the carburettor 29 by two bolts 44. A cylinder block 21 of the engine E and a coupling portion 30-2 of the air intake 30 are interconnected through blow-by gas passages 40 and 41 with an oil separating chamber 39 interposed therebetween. The coupling portion 30-2 is provided at a location offset upwardly from axes of the two bolts 44. Therefore, both of the operation of the bolts 44 for attaching and detaching the air intake 30 and the operation of attaching and detaching the blow-by gas passage 41 to and from the coupling portion 30-2 can be conducted without any hindrance.

Abstract: A variable volume transfer duct for maintaining an optimum volume of buffer gas in the transfer duct of a two-stroke engine during operation in order to minimize short circuit loss of fresh charge at all load levels during engine operation. The variable volume transfer duct that has two pieces, a top and a bottom duct wherein the bottom duct is aligned with and slidably disposed within the upper duct. Control means are provided for raising and lowering of the bottom duct to vary the transfer duct volume accordingly. A control means controls recirculates exhaust gas, or the secondary air, as buffer gas that fills the top of the transfer passage and regulates the buffer gas according to engine load conditions such that it provides a larger amount at higher loads and a lesser quantity at lighter loads.

Abstract: An intake system for an internal combustion engine has a plurality of intake tracts connected in use to extend from individual engine intake ports to a common plenum chamber and a common passage opening into the plenum chamber for supplying air to all the intake ports. The tracts are arranged to open into the plenum chamber in pairs associated with pairs of intake ports, each pair of intake ports having valve events which do not overlap. The ends of each pair of tracts disposed within the plenum chamber are arranged directly facing one another and are separated by a gap which is sufficiently wide to permit mass air flow between the respective tracts and the common passage but which is sufficiently narrow to couple most of any pressure wave energy emanating from one tract directly into the facing tract.

Abstract: An organization wherein each fuel injector includes a heat blanket secured thereabout directing heat from electrical resistance heating, exhaust pipe heating, and the like to effect heating of the fuel injector body and enhance vaporization of fuel directed into an associated combustion chamber.

Abstract: A cylinder head sealing device for an internal combustion engine has a cylindrical gasket ring which has a relatively small wall thickness. This gasket ring engages on the one hand an annular groove within the cylinder head which is coaxially arranged relative to the cylinder axis. On the other hand, it engages a recess at the end of the cylinder liner. The annular groove is dimensioned such that during tightening of the cylinder head screws a radial as well as an axial play remains between annular groove and gasket ring. The sealing action is achieved such that the gasket ring which has relatively thin walls relative to its height is expanded by the gas pressure within the cylinder and pressed with its outer cylindrical wall against the recess of the cylinder liner thus leading to a sealing effect. The sealing effect is thus a function of the gas pressure. The sealing with respect to cooling water is achieved by an auxiliary areal seal which is prestressed by the cylinder head screws.

Abstract: Flame starting unit for a combustion device, especially an internal combustion engine, for preheating the combustion air. A flame glow plug is placed in the combustion air duct of the combustion device and is supplied with fuel and current by a control device. The functioning of the flame starting unit is monitored by a monitoring device, which displays occurring malfunctions.

Abstract: A method of control of the supply of lubricating oil to a two stroke cycle internal combustion engine comprising supplying fuel to a fuel injector from a fuel reservoir having a fuel capacity greater than the maximum fuel requirement of the engine per cycle. The fuel in the reservoir being maintained at a substantially steady pressure. Delivering oil to the engine by a positive displacement pump having a delivery capacity per pump cycle greater than the maximum oil requirement of the engine per cycle. The oil pump being activated in response to the consumption of fuel from the fuel reservoir to maintain a substantially uniform predetermined ratio between the fuel consumption rate and the oil delivery rate.

Abstract: An engine structure and mechanism that operates on various combustion processes in a two-stroke-cycle without supplemental cooling or lubrication comprises an axial assembly of cylindrical modules and twin, double-harmonic cams that operate with opposed pistons in each cylinder through fully captured rolling contact bearings. The engine may comprise one or more pairs of axially symmetric cylinder modules which with their opposed pistons perform perfectly balanced reciprocating and rotary motions at all loads and speeds. The opposed pistons are double-acting, performing a two-stroke engine power cycle on facing ends and induction and scavenge air compression on their outside ends, all within the same cylinder bore.

Abstract: A flame arrestor is disclosed for use with an intake of an internal combustion engine, comprising a cylindrical housing defining an inlet and an outlet and a plurality of honeycombed passageways extending between the inlet and the outlet, wherein each of the plurality of honeycombed passageways has a predetermined length and a predetermined small cross-section substantially smaller than the predetermined length. The cylindrical housing is welded within a mounting bracket adapted for receipt in the intake of the internal combustion engine. The flame arrestor is particularly beneficial for use in a boosted engine in that cooling effectiveness and manufacturability are enhanced by the use of the honeycombed structure.

Abstract: A combined LNG vaporizer and engine to aftercooler coolant heat exchanger 72 is provided for use in maintaining vaporized gas fuel at a design temperature band within the charged combustion air temperature so as to automatically compensate for ambient air and fuel density variations to more accurately maintain a combustible stoichiometric mixture of vaporized LNG and combustion air during periods of engine idling or low power operation or during periods of extreme cold or extreme hot ambient air conditions.

Abstract: A gasifying device is fed oil from the return spill rail of a diesel engine, or from a reservoir of oil and gasifies the lighter fractions of the oil using an electrical heater, the gasified products being fed to the air intake manifold of the engine. In one embodiment unvaporized oil is fed from the gasifying device to the oil supply line to the engine, thereby avoiding a build-up of heavy oil components in the device. Several embodiments are disclosed. The device improves the handling performance of a vehicle fitted with the engine, the exhaust emissions, and the fuel economy. The device may also be fitted to a petrol engine.

Abstract: An engine charge control system operates by initially reducing power from full load by retarding exhaust valve closing timing to increase exhaust gas charge dilution up to the limit for efficient operation. Further load reductions are made by reducing charge mass without increased dilution via alternative steps such as throttling (in conjunction with intake check valves or using individual cylinder valves) or retarding intake valve opening timing without throttling. Partial substitution of external charge dilution is also contemplated.

Abstract: An internal combustion engine is constructed with metallic parts in its rons which are subjected to high stress (temperature, pressure) during combustion and polymeric materials in its regions which are subjected to relatively lower stresses. The integrated construction helps realize increased power densities and reductions in engine noise without compromising engine performance. V-configuration Diesel engines particularly benefit from this construction.

Abstract: An improved reed valve arrangement for a two cycle engine wherein in addition to the normal reed valve elements and stopper plates, there are provided rectifier plates that define a flow passage so as to direct the charge away from the walls of the engine that define the associated intake passage.

Abstract: A multi-part piston assembly for an internal-combustion engine having at least one cylinder. The assembly has a skirt with a threaded member connected thereto, the skirt being adapted to fit into the cylinder for reciprocal movement, and has a removable piston head that has an threaded bore therein adapt:ed to receive the skirt's threaded member removably attach the piston head to the skin. The removable piston head has rings mounted thereon and is adapted to fit into the cylinder for reciprocation with the skirt. A lock screw that locks the piston head to the skirt when the piston head and skirt are attached for use.

Abstract: This invention relates to a novel improvement in diesel engines. A two cycle direct injection internal combustion diesel engine comprising four pistons utilizing two common cylinders, dual rocker shaft (internally including shaft within a shaft), plurality of intake ports, plurality of exhaust ports, water jacket and a single dual throw crankshaft. A single combustion in each cylinder or chamber acts on two pistons in opposite direction. The engine breathes by means of intake and exhaust ports utilizing a charged intake. The opposite rocker motion internally is accomplished by a shaft within a shaft. The rocker motion is transferred to rotary motion via a single dual throw crankshaft.

Abstract: A solid film lubricant system for protecting metal wear interfaces subject to high temperatures and wet lubrications, comprising an oil-attracting solid lubricant mixture with at least two elements selected from the group of graphite, MoS.sub.2 and BN; a support (i.e., hard lands or hard sublayer) for the mixture to loads of at least 10 psi at temperatures of 600.degree.-800.degree. F. while being thermally stable; a thermally stable thermoset polymer matrix adhering the mixture to the support or the wear surface, the polymer having inherent hydrocarbon chemical attraction to form a tenacious oil film of the lubricating oil on the wearing surface. A method of making anti-friction coated surfaces comprising providing a light metal based cylinder surface (i.e.

Abstract: There is provided a highly reliable decompression device of engine which is constructed relatively simply without forming an opening responsible for intrusion of dusts and dirts or foreign matter into a starter cover and/or clogging of foreign matter to ensure that defective operation of individual components due to dusts and dirts hardly occurs to permit steady decompression inside a combustion chamber in cooperation with cranking operation effected by a recoil starter. The decompression device is provided in an internal combustion engine with a recoil starter having a starter cover, a recoil drum housed in the starter cover, and a rotation transmission member movable in the axial direction in cooperation with rotation of the recoil drum to transmit torque from the recoil drum to a crank shaft of the engine.

Abstract: A mechanical component has a recess for receiving a ceramic insert. The insert is held in the recess by a retainer member which preferably resiliently biases the insert inwardly into the recess. The insert provides a hardened bearing surface for the associated mechanical component. For example, the mechanical component may be a piston for use in an engine brake (especially as a master piston in the engine brake), and the ceramic insert may be the portion of the piston assembly which contacts a moving part of the internal combustion engine with which the engine brake is used.