Abstract: An externally ignited four cycle internal combustion engine equipped with an inlet valve and an outlet valve. In one embodiment a swirl (turbulence or vortex) chamber is provided within the cylinder head, the height of the swirl chamber being less than its maximum diameter. An outlet closable by the outlet valve is located in the upper portion of the swirl chamber. A channel-like recess, which creates a guide channel when the piston is in its top dead center position, terminates approximately tangentially in the swirl chamber. The channel-like recess may be formed in the cylinder head, in the top of the piston or partially in both of these members. In another embodiment, a reduced throat area is adapted to introduce the gases from the first inlet valve chamber to an oval secondary chamber adjacent to the outlet valve.

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.

Abstract: A sixty degree, V-6 engine for an outboard motor includes loop scavenging and charging with a pair of oppositely located input passageways with differently angles sidewalls and which provide progressive, smooth constriction to the charging port to establish a highly effective velocity pattern across the top of a flat piston. Cast "Blister" cylinder liners with integral ports are integrally cast into an aluminum block. The block is cast with a single manifold between the two cylinder blanks. A milling cutter is located within the manifold to open the exhaust passageways. A T-shaped manifold is secured to close the manifold and define a pair of separate exhaust passageways. The cylinders are rotated to align the upper and lower inlet ports and particularly to locate the exhaust port projecting downwardly into a center manifold. Adjacent piston rods are mounted upon a common crankshaft pin.

Abstract: Disclosed herein is a starter mechanism comprising a member adapted to be fixed relative to an engine, a pulley which includes a side face and a peripheral groove and which is mounted for rotation with respect to the housing member and with the side face in spaced, generally parallel relation to the member so as to define a spring chamber, a coiled rewind spring located in the chamber and having a plurality of convolutions intermediate inner and outer ends which are respectively anchored to the pulley and to the member, a pull rope anchored to the pulley and wound in the groove, whereby withdrawal of the pull rope from the pulley causes rotation of the pulley in the direction which is effective to wind up the rewind spring and whereby, subsequent to withdrawal of the rope from the pulley and upon release of the pull rope, the rewind spring serves to rotate the pulley in the opposite direction so as to rewind the pull rope in the groove and to unwind the spring, and a restrictor shoe mounted on the pulley for

Abstract: Upon the closing of the ignition circuit, this Diesel engine warm-up control system operates to establish a glow plug energizing circuit; to energize a "wait" indicator lamp and to produce a timed glow plug energization cycle signal. Upon the termination of this signal, the glow plug energizing circuit is maintained; the "wait" indicator lamp is deenergized and a "crank" indicator lamp is energized. The timed glow plug energization cycle signal is re-initiated upon engine crank to maintain the glow plugs energized for a controlled period of time after engine "start".

Abstract: An internal combustion, reciprocating-piston engine which includes a sealed crankcase for inducting and compressing air or an air-fuel mixture into the engine. The compressed gas is then forced into a holding tank for subsequent induction into the cylinder combustion chamber. This pre-compresses or "supercharges" the fuel mixture before compression by the piston. An enclosed lift tube within the connecting rod is provided for conveying lubricating oil through the crankcase to the cylinder walls.

Abstract: The powdered fuel is dosed in metered amounts by a pocketed dosing wheel into a fuel-feeding duct which is opened and closed by reciprocally mounted slider. Air is charged into the fuel feeding duct via a compressed air duct above the fuel valve. Upon opening of the fuel valve, a blast of air is charged via a control valve into the compressed air duct to expel the powdered fuel in the fuel-receiving chambers of the fuel valve.

Abstract: Improved decompression-type, four-cycle internal-combustion engine which has the conventional compression chamber, reciprocable piston, and intake valve therein; comprising, in accordance with the invention, means for delaying the closing time of the valve, in the course of the compression stroke, with the piston moving upwards, for obtaining reduced compression pressure; and means for closing the valve to its at least nearly closed condition within the closing delay period. The inventive delaying and closing means is preferably embodied in a specifically shaped cam for controlling the operation of the intake valve, with respective depressed, slightly protruding as well as flat portions at preferred, predetermined crank angle positions.

Abstract: The disclosure embraces a fuel system and charge forming apparatus of the float bowl type including a heat exchanger or heat transfer means associated with the charge forming apparatus providing a fuel circulating system or circuit for conveying heat away from the fuel in the charge forming apparatus to maintain the fuel below temperatures at which the fuel readily vaporizes to prevent or minimize "vapor lock" in the fuel bowl and fuel channels of the charge forming apparatus.

Abstract: The disclosure relates to a multi cylinder four cycle gasoline engine having substantially conventional intake and exhaust valves in the head ends of the cylinders thereof and having side ports in the cylinders; said side ports in spaced relation to the head ends of the cylinders; a fuel mixture delivery means communicating with said ports; an auxilliary intake manifold which is enclosed; said auxilliary intake manifold communicating only with said intake valves at the head ends of the cylinders; second intake valves disposed to control and time the flow of fuel mixture into said cylinders through said ports.

Abstract: A two part variable compression ratio (VCR) piston assembly for use in a two cycle internal combustion engine, the piston assembly including an outer member movable relative to an inner member to vary the compression ratio of the engine and a hydraulic system utilizing oil from the lubrication system of the engine to automatically control the relative movement of the members to maintain a predetermined maximum combustion chamber pressure. The hydraulic circuit includes an upper and a lower chamber which expands and contracts conversely upon relative movement of the piston members and further includes a pumping system for pumping oil to the upper chamber and to the lower chamber through the upper chamber to thereby vary the compression ratio of the piston.

Abstract: A fuel injection system for externally ignited internal combustion engines including a device for injecting fuel into an air stream and an air measuring device comprising a valve having an airfoil portion. The air measuring valve is pivotably mounted within the suction tube of the engine, thereby exposing the air measuring valve to the air stream flowing through the suction tube. The air measuring valve is exposed to a combination of forces. One of the forces is an impedance induced force developed in accordance with the principle associated with impedance type valves and as a function of the pressure prevailing in front of and behind the air measuring valve when viewed in the direction of flow of the air stream in the suction tube. The other force is a lift force and is developed in accordance with the airfoil principle and as a result of an air flow about the airfoil portion of the air measuring valve.

Abstract: An internal combustion engine has at least three cylinders and induction conduits opening into the lower portion of the cylinders or into the crankcase. The induction conduits are intended at least for combustion air, comprising at least one rotary disc valve rotatably driven by the crankshaft of the engine. The valve has the form of a disc whose rotation axis crosses or intersects the crankshaft of the engine and is arranged in a valve housing through which the induction conduits extend, said valve being designed to alternately open and close the passages of the induction conduits through the valve housing. Said valve housing has at least three induction conduit inlets and is driven at an rpm which is lower than the crankshaft rpm and has a number of sets of recesses corresponding to the rpm reduction for control of the induction.

Abstract: A lean mixture, rich in hydrogen, is introduced into the combustion chamber. Fuel is then injected to the center of the chamber to provide a rich strata. The rapid flame front propagation due to the hydrogen minimizes the HC production quench.

Abstract: Four cycle internal combustion engine including an intake passage leading to an intake port formed in the cylinder head. The intake passage comprises a first passage section connected to the intake port with an inclination so that intake air-fuel mixture is introduced into the engine working chamber with a circumferential velocity component to produce a swirl in the working chamber. The intake passage further includes a second and third sections which together with the first section form a meandering substantially S-shaped passage to establish a stratified fuel distribution in the passage.

Abstract: Rotary valve apparatus is provided for internal combustion engines. The rotary valve apparatus includes separate valve elements for each cylinder of a multicylinder engine with exhaust and intake valves mounted in the engine head for rotation in selectively adjustable, predetermined timed relationship. The valve elements, both intake and exhaust, are disposed in respective isolated valve chambers to prevent direct interaction therebetween.

Abstract: A water cooled internal combustion engine with a cooling blower arranged at one end face of the engine and with at least one water cooler which is acted upon by the cooling blower and extends alongside the engine. The internal combustion engine is supercharged and equipped with a supercharger air cooler arranged below the water cooler and parallel to the central axis of the engine. The cooling air delivered by the cooling blower passes through the supercharger air cooler in a direction perpendicularly with regard to the central axis of the engine. The supercharger air cooler has a gap of its own for the discharged air which has an exit parallel to the discharged air of the water cooler.

Abstract: An internal combustion engine of the four cycle reciprocating piston type wherein intake and exhaust of working fluid and combustible fuel into the engine cylinder is controlled by poppet valve means, while induction air is diverted by rotary valve means between intake and exhaust, said valve means being operated in timed relation with respect to each other at half crank shaft speed of rotation, utilizing blower induction of air as the working fluid which is diverted between intake and exhaust, and advantageously employing fuel injection through a valve plenum that is ported and through which the working fluid is controlled by the cooperatively timed rotary and poppet valve means.

Abstract: Crank-chamber precompression type two cycle engines having scavenging ports connected with the crank-chamber through scavenging passages. An air supply passage is connected through a reed type check valve with at least one of the scavenging passages at the upper portion thereof so that air is introduced into the scavenging passage in the ascending stroke of piston movement and discharged into the combustion chamber in the descending stroke of the piston movement to effect scavenging. The air passage is provided with a control valve which is interconnected with the engine throttle valve so that the amount of air supply through the air passage can be controlled in accordance with the load condition of the engine operation.

Abstract: The cylinder head of an internal combustion engine has a bore provided with an annular shoulder. A liner "U" shaped in cross section has an outward extending radial end flange which overlies the shoulder. A valve guide is insertable into the bore and has a second shoulder overlying the end flange. The end flange is clamped between seal rings by means of a nut acting through a Belleville spring encircling the valve guide. The liner defines an auxiliary combustion chamber therein and the liner has an opening in a wall thereof which forms a flame passage leading to a main combustion chamber.