Abstract: An internal combustion engine comprising a cylinder head with a rotary intake and exhaust valves mounted on the head, the head being interchangeable with cylinder blocks intended for conventional poppet type valve engines. According to a basic aspect of the invention, primary and secondary combustion chambers are provided which are isolated from each other by the piston when at the top of its stroke, enabling combustion to initially take place in the primary chamber with a reduced amount of fuel. Optionally, means are further provided to vary the intake valve opening in accordance with changes in speed of the engine.

Abstract: A solenoid operated valve is installed in the fuel supply line of an internal combustion engine and is effective to interrupt the flow of fuel to the engine while the operating solenoid thereof is energized. A normally closed contact pair of an electrical relay which is energized when the engine is in the normal cranking mode is connected in series in the energizing circuit of the operating solenoid of the solenoid operated valve. A holding circuit for the operating coil of the relay is provided and includes at least a normally open contact pair of the relay and circuitry responsive to the operating mode of the engine effective to interrupt the holding circuit while the engine is in the not running mode.

Abstract: A starting system for compression ignition engines includes an auxiliary engine of the spark ignition type in combination with a conventional cranking motor of the compressed air or electric type. The components are arranged so that either the auxiliary engine or the cranking motor may be used for starting, or both may be used in tandem. The system is combined in a conveniently mounted equipment.The starting system comprises, in combination, a cranking motor having a main shaft, clutch means coupled to the main shaft for engaging the main shaft to the crank shaft of an engine to be started, an auxiliary engine of the spark ignition type, and transmission means including a one-way clutch interconnecting the auxiliary engine with said main shaft, whereby to permit said crank shaft to be driven selectively from said cranking motor or said auxiliary engine, or from said cranking motor and auxiliary engine driving in tandem.

Abstract: An air cleaner for intake air of an internal combustion engine wherein one end of a pressure balancing tube connected to a space confined within a crank case of the engine communicates with to an air cleaner outlet chamber space from which the intake air for the engine is taken out through a main port, characterized in that a port communicating with said one end of the pressure balancing tube is positioned to border on said main port.

Abstract: A silencing housing for enclosing a machine plant having at least one external cooler, for instance a compressor unit, which housing being divided into a primary chamber for accomodating the machine and a secondary chamber communicating with said primary chamber. Within the secondary chamber there are located a cooler and a ventilator. The ventilator is arranged to accomplish a ventilating air flow through the primary chamber as well as an air flow through the cooler within the secondary chamber. To this end the primary chamber is provided with one air inlet opening and the secondary chamber is provided with one air inlet opening and one air outlet opening. For adapting the housing to a machine plant having two external coolers it is provided with a tertiary chamber as well wherein the additional cooler is disposed. A second ventilator is arranged to establish an air flow through the additional cooler, which air flow extends out of the housing through an air outlet opening disposed in said tertiary chamber.

Abstract: The valve system of this invention is for use on an internal combustion engine having a plurality of pistons slidable in respective cylinders each forming a combustion chamber. The engine comprises a block forming the cylinders and having a head or rotary valve housing mounted to the top of the block. In a multiple cylinder in-line engine design, a shaft is suitably supported extending within the housing and is driven via a timing belt from the crankshaft. A plurality of preferably parabolically shaped rotors are fixedly disposed along the length of the shaft at predetermined intervals with each rotor positioned above a cylinder and received by a bushing of the housing. The shaft is preferably spring loaded at one end and supported by bearings at both ends. Each rotor is constructed of a pressed graphite and has an arcuate recess for providing selective communication between either an inlet port or an exhaust port and a passage in the head leading to the combustion chamber.

Abstract: Electromagnetic treatment of liquid fuel charge shortly prior to atomization in carburetor and of cycled crankcase gaseous suspension prior to passage to automobile internal combustion engine combustion chamber improves fuel utilization efficiency and reduces pollutants in exhaust.

Abstract: The invention relates to a method and apparatus for operating an internal combustion engine whereby to obtain maximum efficiency concomitant with minimum pollution of the atmosphere due to the discharge of exhaust gases. The engine is fueled with a stratified charge of a combustion supporting gaseous mixture, followed by the force injection of a fluidized fuel. To assure proper combustion, particularly at low loads, the intake volume of said combustion supporting medium is throttled. The conditions resulting within each combustion chamber are enrichment of the combustible charge and higher temperatures. As progressively greater loads are applied to the engine, the throttling action is progressively reduced to maintain a combustible, yet lean, mixture to midload. Further increase in load is accomplished by enrichment through increased fuel input.

Abstract: A prechamber in the cylinder head of an internal combustion engine is fed with a rich air-fuel mixture by means of a valve comprising a flexible blade element which normally rests on a flat seat. The actuator control for opening of the blade element is effected on the one hand by natural aspiration of the cylinder and on the other hand by a cam element carried by a cam shaft and directly acting on the flexible blade element.

Abstract: A combination primer and pump for internal combustion engines which utilizes a flexible cylindrical housing having a flexing liner with unidirectional valves at each end. The walls of the cylinder permit manual flexing or squeezing to pump fuel and a pulse connection in the outer housing connects the crankcase pulse of an engine being supplied with fuel to the inner, more flexible, liner to permit pumping action to take place when the engine is running. A pressure pulse passage between the outer and inner liner is positioned to be closed when the device is manually squeezed to achieve the priming function.

Abstract: A jet ignition internal combustion engine of the type provided with separate induction passages for lean and rich air-fuel mixtures wherein the main inlet valve mounts a cup like member forming an auxiliary ignition chamber within the main combustion chamber. The rich mixture is supplied to the auxiliary chamber through the hollow stem of the main inlet valve, flow being controlled by a small auxiliary valve within the main valve and actuated by the same valve gear. Openings in the wall of the valve-carried ignition chamber connect with spark ignition means and with the main combustion chamber to provide for spark ignition of the rich ignition chamber mixture and resultant jet ignition of the lean mixture in the main combustion chamber.

Abstract: A method and apparatus for controlling the air flow in an internal-combustion engine that comprises an unthrottled variable-timing third valve engine modification. An unthrottled full charge of air is drawn into the cylinders during the standard intake stroke of a four-stroke internal-combustion engine. During the initial portion of the succeeding compression stroke, a portion of that full charge is discharged through a third valve. Thus, the same mass of air that would result from throttled engine remains in the cylinders to be compressed. This air quantity is adjusted by means of adjusting the timing of the opening and closing of the third valve in accordance with the power requirements of the engine. A full charge of air is utilized for a full load, while a lesser charge is utilized for a partial load. Power losses which result from conventional intake air throttling are thereby eliminated.

Abstract: A combination primer and pump for internal combustion engines which utilizes a flexible cylindrical housing having a flexing liner with unidirectional valves at each end. The walls of the cylinder permit manual flexing or squeezing to pump fuel and also a pulse connection in the outer housing serves as a valve to connect the crankcase pulse of an engine being supplied with fuel to the inner liner to permit pumping action to take place when the engine is running. The pulse connection may also serve as a control for the pulse pressure and thus for the fuel flow and pressure.

Abstract: An induction pipe for internal combustion engines having a distributor section and supply lines for the mixture with the deflector having means therein to even the distribution of the mixture and the deflector being formed by a wall between the branch off points and also provided with recesses.

Abstract: A fuel injection system for externally ignited internal combustion engines in which a fuel metering and distributing valve is controlled by an air sensing element disposed in the air suction tube of the engine and by structure which is adapted to alter the restoring force exerted on the air sensing element through the fuel metering and distributing valve. The noted structure includes a control pressure conduit, a pressure control valve connected to the control pressure conduit and a further conduit for connecting the pressure control valve to the suction tube of the engine downstream of the butterfly valve. With this structure it is possible to alter the restoring force mentioned above so that a momentarily enriched fuel-air mixture is achieved when the butterfly valve is suddenly opened and so that a momentarily weakened fuel-air mixture is achieved when the butterfly valve is suddenly closed.

Abstract: A three-valve prechamber internal combustion engine is provided with a conduit through which atmospheric air may be drawn into the intake passage leading to the prechamber. A solenoid valve in the conduit is opened during deceleration of the engine to lean-out any over-rich mixture and to remove any fuel droplets clinging to the walls of the auxiliary intake passage, thus preventing the temporary formation of an over-rich mixture which is not ignited by the spark plug. Such an over-rich mixture when exhausted into the exhaust passage contacts the hot portions thereof to be explosively ignited to produce the undesirable afterburning phenomenon.

Abstract: A valve assembly is provided for controlling the recirculation of exhaust gas in an internal combustion engine. The assembly comprises body means defining a first chamber containing vacuum, and a second chamber exposed to air at substantially atmospheric pressure. A means is provided for communicating between the first chamber and the second chamber including first valve means for controlling the flow of air from the second chamber into the first chamber in response to variations in the pressure of the exhaust gas, and a pressure responsive control means is subjected to the pressure in one of the chambers. The assembly further includes an exhaust gas inlet and an exhaust gas outlet and a second valve means disposed between the inlet and the outlet, the valve means being operatively associated with the pressure responsive means to be controlled by the movement of the pressure responsive means.

Abstract: An electronic-fuel-injection-system enrichment circuit for use during cranking of an internal combustion engine having a fuel supply controlled by the fuel injection system. The fuel injection system produces a fuel control electrical signal representative of a quantity of fuel to be injected into the engine. An enrichment circuit, for use during cranking of the engine to increase the quantity of fuel represented by a fuel control electrical signal, is provided. This enrichment circuit includes circuit means for generating an enrichment electrical signal having a characteristic which varies with time subsequent to initiation of cranking of the engine and circuit means for combining the enrichment electrical signal with at least one other electrical signal representative of a fuel quantity to be injected into the engine. The combined electrical signals produce the fuel control electrical signal.

Abstract: In an internal combustion engine, a latch member is movable to and from a latching position in which it prevents a valve from coming nearer its seat than a predetermined distance therefrom. A cam follower connected with the latch member cooperates with axially adjacent first and second cam elements. The first causes the latch member to be held out of latching position during most of the engine cycle at all speeds, but at cranking speeds causes it to move to latching position just before the valve, in closing, reaches said distance from its seat. Once in latching position, the latch member is trapped there until opening movement of the valve carries it beyond said distance from its seat. The second cam element, carried by a flyweight, so cooperates with the first at running speeds as to hold the latch member out of latching position throughout the cycle.

Abstract: A two-stroke combustion engine with intake and exhaust ports which are indirectly or directly controllable in accordance with the reciprocating motion of a working piston in a cylinder space, wherein at one side of the piston there is a working chamber accessible to an ignition device and connectible to an outlet, and at the other side of the piston there is a compression chamber, and wherein there is associated with the working piston at least a second auxiliary piston functioning as a compression piston, which operates in a compression chamber at least in a single acting mode.