Abstract: A carburetor has a main throttle and an auxiliary throttle which is automatically opened in proportion to the air flow in the induction pipe. Fuel is delivered to the induction pipe through a passage whose cross-section is metered in accordance with the position of the auxiliary throttle. The richness of the air-fuel mixture is automatically adjusted by a system comprising a probe which is sensitive to the conditions prevailing in the exhaust pipe. The system periodically opens an air path to the fuel passage and the duration of each opening period is automatically determined for a correct richness to be achieved.

Abstract: An overhead valve chest for an internal combustion engine with a cylindroconical portion adjacent to the bottom seating of the chest within the cylinder-head and comprising a sealing ring overlapping said cylindro-conical portion and mounted in a groove the diameter of the flat horizontal top wall of which adjacent to the conical portion of said chest is larger than that of the lower wall opposite to the cylindrical wall of said chest, said ring being in continuous bearing engagement with its ends inside of said groove.

Abstract: An installation for preheating the combustion air for the multi-fuel operation of air-compressing and auto-igniting injection-type internal combustion engines with poorly ignitable fuels, for example, gasoline, during idling and partial loads, which essentially consists of an injection nozzle for fuel and of a spark plug arranged in the suction pipe. The spark plug and injection nozzle are thereby combined into a structural unit as an insert body which includes a cover structure partially covering the spark plug and the injection nozzle while a protective plate member is provided in the path of the combustion air within the suction pipe for shielding the flame.

Abstract: A lubricating system for an internal combustion engine includes a crankcase within which are located the rotating shafts, one of which is the crankshaft, and the bearings for these shafts, the crankcase having disposed above it the cylinder block of the engine, and within its bottom portion the sump for the lubricating oil. The oil pump body is radially centered within a cylinder casing by peripheral engagement with a pump seat, formed within one of the end walls of the cylinder casing of the engine crankcase and the pump body serves as the end bearing for the rotating shaft of the engine, the extension of which constitutes the pump shaft.

Abstract: A starting system for use with an internal combustion engine is shown utilizing a container of compressed volatile fluid to be injected into the engine upon starting. The fluid is delivered from the container through the actuation of a solenoid that subsequently provides a metered quantity of the fluid to the engine. The solenoid is connected in electrical series with the engine starting switch, a timing switch, and a thermostatic switch. Operation of the starting switch results in the opening and closing of the timer switch to alternately break and complete the series circuit; the thermostatic switch is normally closed and is opened to break the series circuit when the engine temperature reaches a predetermined value.

Abstract: A staged internal combustion engine is provided with means for controlling temperature of the interstage gases within predetermined ranges appropriate for the varying operating conditions of the engine. The temperature control is responsive to significant engine conditions such as interstage gas temperature, engine speed and inlet manifold pressure to supply temperature controlling fluids to the interstage gases. The temperature controlling fluids include vaporizable liquids, such as water, which are added to limit maximum temperatures of the interstage gases and combustion supporting gases, such as air, which react with excess fuel in the interstage gases to quickly reach and maintain minimum temperatures.

Abstract: A cylinder has a head and a bottom. A piston is reciprocable in the cylinder and defines a power chamber with said head and an air compression chamber with said bottom. Controlled intake and exhaust ports are formed in said cylinder and adapted to communicate with said power chamber. Igniting means are operable to initiate a combustion of a fuel-air mixture in the power chamber. An inlet is formed in the cylinder and adapted to communicate with compression chamber. A valve controls said inlet. Said piston is adapted to perform in response to the combustion a power stroke toward a dead center near the bottom, whereby air is compressed in the compression chamber. Transfer means are provided to transfer compressed air from the compression chamber to said exhaust port after said power stroke.

Abstract: A double acting working piston drives a connecting rod and crankshaft. A smaller valve piston is fastened to each end of the working piston. Each valve piston withdraws briefly from its bore so as to introduce scavenge air into a respective annular working chamber. The valve pistons have a centering means and are provided with novel radially restrained piston rings so as to smoothly re-enter their bores without impacting. Other novel features are: inlet nozzle and vanes, rear slide tubes for conducting coolant (such as water) to the pistons, an oil seal which permits the wrist pin to be full floating, and long tie bolts passing through water passages formed in the exhaust port bridges.

Abstract: A fuel reforming system for use in an intake system of an internal combustion engine operable with a hydrocarbon fuel has a spark plug or plugs for intermittently producing spark discharges to cause imperfect combustion of a rich air-fuel mixture so that a part of the fuel is reformed into intermediate combustion products and the large portion of the remainder of the fuel is vaporized by the heat produced by the imperfect combustion, whereby the reformed mixture is made optimum for combustion to thereby enable the engine to perform an optimum operation.

Abstract: A lubrication and sealing system for the cylinder head of an internal combustion engine having a sleeve valve mounted for rotation therein, said sleeve valve having intake slots therethrough which register periodically, as the valve rotates, with air intake ports in the cylinder to permit air to enter the cylinder. The sleeve valve is provided with one or more helically shaped sealing rings carried in the wall of the valve facing the wall of the cylinder, which said rings, as the valve rotates, sweep the wall of the cylinder to circulate lubricant oil within the clearance space between the valve and the cylinder to thereby lubricate and seal the clearance space. The circulation of lubricant also has a beneficial cooling effect.

Abstract: A supercharging device and method for providing ambient temperature air at pressures above ambient to the air intake of a vehicle engine utilizing a primary air scoop through which ambient air for a radiator is drawn by an engine fan and, positioned within the throat of a venturi defined in the primary air scoop, a secondary air scoop connected to the engine air intake.

Abstract: A turbocharger for an internal combustion engine. The turbocharger is coupled to an air-to-air heat exchanger (intercooler) to cool the compressed air just prior to its entry into the engine. The turbocharger has axially spaced turbine, compressor, and fan rotors to thereby preclude undesired mixing of air streams.

Abstract: The exhaust port of a spark ignition two cycle engine has the general shape of an inverted T with a base portion and a narrower upwardly extending stem portion. The top of the base portion is approximately at the level of the top of the transfer port which admits fuel-air mixture to the engine cylinder. The top of the stem is from 20.degree. to 55.degree. of crankshaft rotation in advance of the opening of the transfer port. This configuration of the exhaust port produces a low broad blowdown pulse which in turn results in a low noise level of the exhaust.

Abstract: The invention is an improved piston and cylinder arrangement for a loop charged two-stroke engine wherein all input passages are open channels in the cylinder wall and the top annular edge of the piston is rounded. The rounded edge on the piston cooperates with the described scavenging and input passages to reduce drag and, cause the incoming charge to flow more horizontally over the piston head; thereby improving scavenging and volumetric efficiency.

Abstract: A three-valve stratified-charge internal combustion piston engine has an auxiliary combustion chamber connected to each main combustion chamber through a torch nozzle. A rich mixture is supplied to the auxiliary chamber and a lean mixture is supplied to the main chamber. A portion of the exhaust gases from the main chamber is recirculated through a control valve to mix with the rich mixture supplied to the auxiliary chamber. For loaded conditions of the engine, additional exhaust gases from the main chamber are recirculated through a control valve to mix with the lean mixture supplied to the main chamber. The control valves are automatically operated by means responsive to engine operating conditions.

Abstract: An internal combustion engine in which heat is derived from the engine cooling system and/or the exhaust to heat a working fluid in a closed circulatory system. This heat transforms the working fluid into a gas which is delivered to a turbine which drives a generator. The generator delivers DC current to an electrolysis cell in which water is decomposed. The water is decomposed by the electric current into its oxygen and hydrogen components. The oxygen is passed to the air intake of the engine carburetors, while the hydrogen is conveyed to a carburetor therefor. Also included is a carburetor for conventional hydrocarbon fuels. The two carburetors are connected by linkage which may be operated either manually or by pressure to vary the ratio of the carbureted fuels which are delivered to the engine.

Abstract: Alarm apparatus is provided for a recirculating exhaust gas flow control device, which device is employed in an internal combustion engine responsive to the negative pressure induced in the carburetor of the engine for controlling the flow of exhaust gas that is recirculated into the fuel-air mixture to be sucked into the engine; the device has a high pressure chamber in communication with the atmosphere, a low pressure chamber in communication with the engine negative intake pressure, and a diaphragm between the chambers for driving a valve that controls the flow of recirculating exhaust gas. The alarm apparatus employs a diaphragm forming high and low pressure chambers and for driving an actuating rod of a control circuit having an alarm signal lamp.

Abstract: An aluminum alloy piston for an internal combustion engine, which has been made wear and seizure resistant by forming an adherent coating on at least the skirt of said piston, by applying thereto an iron-carbon powder containing less than 0.3% by weight of C, the balance being substantially all iron. A film of manganese phosphate may be subsequently applied to said skirt.

Abstract: A two-cycle engine system of the crankcase precompression type comprising the combination of a first engine, a second engine and a combustion chamber provided with an ignition plug constructed in such a manner that the second engine is mounted in parallel and adjacent to the first engine with the combustion chamber interconnecting the first and second engines, whereby the construction becomes very compact. A rich air-fuel mixture is supplied into the combustion chamber through the second engine for ignition and a lean mixture (or air) is supplied into the first engine for scavenging and combustion so that the system provides a very compact design as well as a satisfactory performance in the reduction of the amount of harmful components in the exhaust gases.

Abstract: The carburetor has a principal fuel jetting system which is situated upstream of a principal throttle member actuated by the operator and, for cold starting, an auxiliary starting device, controlled by the engine temperature, to increase the flow-rate of fuel and if necessary the flow-rate of air admitted into the intake pipe of the engine with respect to the flow-rate corresponding to hot idling. The starting device comprises a closure valve means adapted, as long as the engine has not reached its normal operating temperature, to open a channel which receives a mixture of air and of fuel in a well-determined proportion and which opens into the zone of the intake pipe situated downstream of its principal throttle member. A starting valve situated in the intake pipe upstream of the principal jetting system, is maintained sufficiently open, when the engine is warm, not to substantially enrich the air/fuel mixture on idling and at very small engine loads.