Abstract: A fuel system for supplying gasoline or like vaporizable fuel to the carburetor of an internal combustion engine as a mixture of liquid and vapor wherein the vapor predominates.

Abstract: The invention concerns a device for controlling the vehicles fuel-air mixture by regulating the air in the ventilation passage leading to the engine air intake from the crankcase. In a vehicle provided with a PCV valve, the device is located in the ventilation passage leading from the crankcase to the engine air intake and the device is downstream of the PCV valve. The device admits outside air to the ventilation passage to lean the gas mixture when the engine creates a vacuum less than 8 PSI in the ventilation passage.

Abstract: The invention relates to an internal combustion engine structure, and addresses the problem of preventing coolant and lubricant from mixing therein.A seal structure is provided for sealing between an engine block 10 and a cylinder liner 34 in an internal combustion engine. The seal structure 40, 42 comprises an annular insert member preferably made of a high temperature resistant resinous material. The insert 100 fits in a recess 136, 134 in the engine block 98 and encircles the cylinder liner 94. A resilient seal member 110, 112, 114 in a groove 104, 106, 108 in the inner surface 130 of the insert 100 seals against the cylinder liner 94.

Abstract: A charge air cooler for mounting within the intake manifold of a combustion engine. A pair of U-shaped mounting brackets are secured to opposite sides of the charge air cooler, and these brackets carry floating nuts for receiving bolts for mounting the charge air cooler securely within the intake manifold.

Abstract: In a typical vehicle intake manifold on which is mounted a carburetor, a fluid flow director is used to turn the initial downward flow of fuel and air into a lateral direction while simultaneously transmitting heat energy to the fluid for more complete fuel evaporation. The flow director is designed to apportion fuel-air flow over all the face surfaces of several parallel spaced plate members. Except for the lowest or most remote plate member from the fluid inlet, the plates have apertures therein, the diameters of which progressively decrease with greater spacing of the plates from the manifold inlet. The plates are preferably of a ceramic material having a positive temperature coefficient or PTC which is characterized by relatively low electrical resistance at ambient temperatures, but much higher resistance at temperatures corresponding to engine operating temperatures.

Abstract: An engine fuel economizer comprising an electric fuel heating device interposed between the fuel pump and carburetor of a gasoline engine in proximity to the carburetor, a catalytic vapor condenser and filter interposed between the heating device and carburetor, and a relief valve interposed between the heating device and vapor condenser and connected to the fuel line between the fuel tank and fuel pump.

Abstract: In combination with a standard carburator for an internal combustion engine having a butterfly type throttle valve, a means is provided having a passageway with another butterfly type valve and the means is disposed between the carburator and the engine wherein the added valve rotates about an axis disposed normal to the axis of rotation of the throttle valve. Linkage means are provided so that both valves open and close together. A cylindrical chamber is provided with one end opened to the atmosphere and a piston is disposed slideably therein. A compression spring within the chamber urges the piston towards the open end to seat against an internal shoulder formed in the cylinder. Two ducts are provided whereby one end of each duct communicates with the passageway in the means, upstream of the valve therein, and one end of the other duct communicates with the passageway downstream of the valve.

Abstract: A multi-cylinder internal combustion engine comprising a plurality of cylinders each having a helically-shaped intake port. The helically-shaped intake port comprises a helical portion having the outlet open end, and an inlet passage portion having an inlet open end and tangentially connected to the helical portion. The intake valve is arranged in the outlet open end. The engine further comprises a common connecting passage and a plurality of branch connecting passages each being in communication with the common connecting passage. Each of the branch connecting passages opens into the inlet open end of the corresponding helically-shaped intake port at a position near the upper wall of the helically-shaped intake port.

Abstract: Apparatus and method for improving the operation of an internal-combustion engine and reducing hydrocarbons emissions therefrom by cooling the fuel during its passage from the fuel supply tank to the intake manifold.

Abstract: A device for vaporizing fuel in an internal combustion engine whereby the fuel-air ratio in the mixture zone is varied by controlling the temperature of the vaporized fuel without the need for changing the orifice cross section of the nozzle. The fuel is first heated by means of a first electric heater and by the hot engine exhaust gases flowing through a pipe in the heat exchanger. Additional heat may be applied to the fuel by means of the cooling oil returning from the nozzle and electrode carrier which injects the fuel into the combustion zone.

Abstract: There is provided an air-fuel mixture ratio correcting system for a carburetor in which the air-fuel ratio of a mixture fed to an engine is detected whereby to control the amount of auxiliary fuel and/or the amount of auxiliary air to always control the air-fuel ratio of the mixtures at the correct value.

Abstract: A multi-cylinder engine comprising a carburetor housing forming therein at least two branch mixture passages. Each of the branch mixture passages is connected to a respective intake port. A throttle valve of the carburetor is provided for each cylinder. Each of the throttle valves is arranged in the respective branch mixture passage and attached onto a common throttle shaft. A wedge shaped groove is formed on the bottom inner wall of each of the branch mixture passages, and the common throttle shaft is arranged in the wedge shaped groove for causing the mixture to flow only along the upper wall of the branch mixture passage. A single common connecting passage and branch connecting passages which are connected to the common connecting passage are provided.

Abstract: A plate mounted between the carburetor and intake manifold having horizontally extending passageways and inlet and outlet ports communicating with four vertical apertures aligned with the passageways of the carburetor and intake manifold. Double-walled tubular heat exchangers, formed of spaced apart outer and inner jackets, are disposed in the vertical apertures, the spaces between the outer and inner jackets communicating with the plate passageways and being sealed from the inside of the inner jackets, such that engine coolant can be circulated through such spaces and through the plate to cause preheating of the fuel-air mixture as it passes through the inside of the exchangers and into the intake manifold. The inner periphery of each inner jacket has ring shaped serrations and a downward taper, which together with preheating by the heat exchangers results in significantly improved vaporization of the fuel-air mixture.

Abstract: A technique for improving in an internal combustion engine the coupling of microwave energy to the flame-front of a combusting air-fuel mixture plasma, by shaping the combustion chamber so that the latter accommodates the lowest order "spherical re-entrant" microwave mode (the TM.sub.010.sup.sr mode). Such a shape contributes to optimum coupling of microwave energy to the flame-front plasma, since this mode (a) minimizes the microwave frequency and hence the flame-front plasma Q and (b) minimizes the variation of Q with flame-front growth.

Abstract: In a rotary coupling, such as the coupling between a piston pin and the holes for the same bored in the bosses of a piston for an internal combustion engine, a device for improving the lubrication, comprising a number of turns of capillary circumferential groove hollowed in one of the coupling surfaces, said groove having preferably a depth ranging from 5 to 20 .mu.m, a pitch ranging from 0.25 to 1 mm and an eccentricity not exceeding 2 .mu.m.

Abstract: An air-fuel mixture control valve assembly for automotive vehicles comprises a valve member which is capable of controlling the opening-closing operation of an air admission passage connected to an intake manifold and a one-way disc valve which is disposed in the air admission passage to prevent the possible adverse current of a high pressure and high temperature fluid within the valve assembly, whereby the air is supplied to the intake manifold upon the sudden deceleration of the vehicle to thereby prevent possible generation of various pollutants.

Abstract: A multiple cylinder engine having an intake passage for each cylinder. A shut-off valve or valves are provided in the intake passage or passages leading to selected one or ones of cylinders downstream of the throttle valve. The shut-off valve is closed in idling operation so that the combustible mixture is totally supplied to the remainder of the cylinders to increase the mixture charge therein. The intake passage or passages leading to the selected cylinder or cylinders are supplied with air when the shut-off valves are closed so that the peak pressure in such cylinders is increased. The air supply is cut-off in deceleration in order for preventing the engine-brake effect from being weakened.

Abstract: A heated fuel intake system for an internal combustion engine for introducing warmed air to the engine and air to a fuel supply circuit in a carburetor comprises a heat stove from which the warmed air is introduced into an air cleaner to heat the air to a temperature equal to or higher than a first predetermined temperature. The introduction of the warmed air from the heat stove is interrupted by a first valve unit when the temperature of the air to be fed to the engine has exceeded the temperature equal to or higher than the first predetermined temperature. The introduction of the warmed air into the air cleaner is again initiated when the temperature of the air inside the air cleaner becomes a value equal to a second predetermined temperature higher than the first predetermined temperature and, simultaneously therewith, an air-fuel ratio leaner is operated to introduce an additional air to compensate for the increased richness of the combustible mixture.

Abstract: The present invention relates to a fuel heating system for an engine comprising a cylindrical fuel chamber having a heating line extended centrally through the same and communicatively connected to the engine cooling system. Provided on opposite ends of the fuel chamber are inlet and outlet gas ports that allow fuel to be directed to and into the fuel chamber where the same is heated by the fluid of the engine cooling system passing centrally through the fuel chamber via the heating line. As the fuel is heated up to approximately 160 degrees farenheit, it is then directed from the outlet gas port directly into the carburetor of the engine.

Abstract: An induction system for an internal combustion engine that improves efficiency through increasing flame propagation at low and medium speeds and loads. This is accomplished through the use of a relatively small cross sectional area auxiliary induction system through which at least a portion of the charge requirements are supplied. The small cross sectional area causes the charging to be introduced at a high velocity, thus increasing turbulence in the intake charge to promote rapid flame propagation when the spark plug is fired. At least a portion of the idle charge is also delivered through the main induction passage so as to reduce the velocity of the intake charge. The charge delivered through the main induction system flows at an angle to that discharged from the auxiliary induction system so that the two flow paths will create internal turbulence due to their different directions.