Abstract: A diesel fuel heater which is readily adapted for serving as a retrofit to existing diesel filter components, e.g., such as utilized in some existing automobile diesel engines. The heater includes a cylindrical plastic housing, and a flat annular conductive mounting plate located within the housing and containing thereon a plurality of positive temperature coefficient (PTC) thermistors designed for contacting diesel fuel passing through the housing and for heating same. A contact spring means is utilized to provide electrical current to each of the thermistors, said contact spring means electrically coupled to an electrical terminal which projects from the insulative housing and is designed for being connected to a suitable power source. An adapter is utilized to interconnect the housing of the diesel fuel filter component with a disposable filter typically utilized with such a housing to maintain both of these members in a spaced-apart relationship.

Abstract: A housing has an inlet arranged to be connected to the outlet of a fuel mixing device of an internal combustion engine such as a carburetor and an outlet arranged to be connected to the intake manifold of the engine. In a preferred embodiment of the invention, the housing has two or more spiral bores. These bores have a cross sectional area less than the cross sectional area of the outlet of the carburetor to provide increased time and velocity through the spiral bores and to isolate the carburetor from vacuum pulsations of the engine. The defining surfaces of the spiral bores is roughened to increase atomization. A second embodiment utilizes an elongated housing also having a spiral path for mixing the fuel and air.

Abstract: An improved fuel injection system for a spark ignition multicylinder internal combustion engine includes a fuel heater tank for vaporizing liquid fuel and accumulating a supply of fuel vapors. The fuel vapors are pressurized by an air pump driven by the internal combustion engine, and a plurality of injection nozzles are located in the intake manifold at positions as close to the intake valves as possible. A control valve mechanism supplies fuel vapors accumulated in the fuel heater tank to each of the nozzles.

Abstract: A fuel pre-heater for an internal combustion engine consisting of a coil in the fuel line in advance of the engine carburetor with a series of coil convolutions in heat transfer contact with the engine coolant conduit intermediate the radiator and the engine block with at least one section of said fuel line passing through said coolant conduit.

Abstract: A fuel economy device comprising a body formed to define a chamber having an externally screw threaded neck portion and communicating with the chamber an internally screw threaded aperture for receiving a spark plug and an inlet pipe including a non-return valve provided to facilitate the injection of water into the chamber and to resist the flow of gas from the chamber.

Abstract: A method and system for preheating internal combustion engine fuel to an optimum temperature before introducing the fuel into the carburetion system. It has been found that an engine fuel such as gasoline will have an optimum temperature at the point of carburetion for maximum combustion efficiency. A heat exchanger extracts heat from hot engine coolant to add heat to the fuel. A thermostatic switch and solenoid valve controls coolant flow to maintain the optimum temperature. Thermal insulation is provided around the fuel supply system and the heat exchanger to prevent engine heat from causing the fuel temperature to exceed the optimum temperature.

Abstract: An induction system for an internal combustion engine having main induction passages and relatively small cross-sectional area auxiliary induction passages for delivering a charge from a carburetor to the combustion chambers. A control valve arrangement is provided so that the engine charge requirement at idle and low load are supplied through the small auxiliary induction passages so as to increase turbulence in the combustion chamber at the time of combustion. The inlet to the auxiliary induction passage is disposed in the path of fuel discharge from the idle circuit of the associate carburetor so as to improve mixture distribution and promote smooth running. The inlet for the auxiliary induction passage is also positioned at a higher point than the control valve so as to reduce the likelihood of liquid fuel being drawn into the auxiliary induction system. The inlet for the auxiliary system is also heated to improve vaporization.

Abstract: A plate and fin type heat exchanger is provided with an improved mounting arrangement for mounting the heat exchanger, for example, within the intake manifold of a combustion engine for use as a charge air cooler. A plurality of threaded nuts are secured as by welding at predetermined points at the inboard sides of the heat exchanger side plates for receiving bolts passed through aligned bolt-receiving holes in the intake manifold and side plates to secure the heat exchanger in place, thereby providing a mounting arrangement permitting the heat exchanger to occupy substantially the entire cross-sectional area of the intake manifold for optimized heat transfer capacity.

Abstract: A heater system for a diesel fuel filter comprises a housing, a self-regulating electrical resistance heater element of positive temperature coefficient of resistivity arranged in heat-transfer relation to thermally conducting components to form a heater means, the heater means being mounted within the housing so that diesel fuel passes directly over and around the various thermally conducting components of the heater means to elevate the temperature of the fuel as it passes to the filter to deter clogging of the filter by paraffin or other fuel components which may solidify in the fuel at lower temperatures, and electrically conducting means which extend from the housing in sealed relation to the housing for electrically connecting the heater means to a source of electrical power.

Abstract: A housing located between a conventional carburetor and the intake manifold inlet on a conventional internal combustion engine (such as that used in an automobile) has internal compartmentation to receive a volume of fuel and air mixture from the carburetor and to direct same through an outlet compartment and thence through a conduit to a fuel mixture heat exchanger mounted on the engine. The heat exchanger comprises one or more heat exchanger units each having a closed cylindrical housing with a plurality of closed, individual fuel mixture conduits therein (such as copper tubing). Each cylindrical housing is connected by a conduit, such as a hose, to the hot air exhaust manifold of the engine so that the heated air from the manifold is directed through each housing and around the heat exchanger tubes therein. A filter unit comprises a closed housing which receives the heated fuel through a porous screen baffle and a series of conventional ceramic or foam plastic or other types of filter material.

Abstract: A fuel system and electronic control therefor which is especially designed for use with an internal combustion engine or the like in which said fuel system is operable to provide fuel fumes or vapor to the engine from a source of liquid ignitable vaporizable fuel, such as gasoline, of sufficient quantity whereby to significantly increase the efficiency of the engine and thus substantially increase the per gallon mileage rate for the engine when used in an automotive vehicle or the like, and one using liquid fuel as the original fuel source. The system incorporates an electronic control operable to monitor a plurality of engine parameters and which control is responsive to a change in engine demand for said fuel and resultant change in one or more of said engine parameters to maintain the optimum ratio of vaporized fuel and air in the mixture delivered to the engine for combustion.

Abstract: Apparatus for improving fuel utilization efficiency of an internal combustion engine comprises an elongate device for mounting in a liquid fuel line having a plurality of radially spaced longitudinal bores in a solid plastic housing communicating with an inlet and outlet. Aligned magnets are retained in shallow axial cavities at each end of the housing. The device is energized by placement between a pair of electrodes having a high voltage for several hours.

Abstract: A fuel supply system for an internal combustion engine has an electrical resistance heater accommodated in a chamber in gasket means which space a throttle body flange from a mating flange on an intake manifold of the engine for transferring heat to the throttle body flange to avoid freeze up in the throttle body during furnishing of an air-fuel mixture to the engine.

Abstract: A fuel system for an internal combustion engine has an electrical resistance heater accommodated in low profile gasket means at a location between a throttle body mounting flange and a mating intake manifold flange for heating the throttle body. The gasket means comprises a relatively rigid electrically insulating spacer forming a chamber, a heat-transfer member and a terminal secured to opposite sides of a heater for mounting and making electrical connection to the heater which is accommodated in the spacer chamber, and relatively thin outer layers of more compressible gasket material for sealingly engaging the throttle body and mating manifold flange means respectively.

Abstract: A fuel preheater for heating fuel being supplied through a fuel conduit from a fuel supply to the engine. Fuel heating is accomplished as a result of heat exchange between the fuel and engine coolant flowing in a coolant conduit. The preheater comprises a coolant tube adapted to have heated coolant flow therethrough and a fuel tube adapted to have fuel flow therethrough enroute to the engine. The fuel tube includes a coil having a plurality of convolutions extending around the exterior of the coolant tube and a downstream section extending through the coolant tube. The region of the downstream section between the most downstream convolution and the location at which the downstream section enters the coolant tube is spaced from the coolant tube in a way to minimize the likelihood of vapor lock.

Abstract: A fuel system for an internal combustion engine has an electrical resistance heater accommodated in gasket means disposed between a throttle body flange and a mating flange on an intake manifold so that the heater is located immediately adjacent an idling speed fuel inlet nozzle or the like in the throttle body for transferring heat to the nozzle area through the throttle body flange to prevent freeze-up of the nozzle during engine operation.

Abstract: A vibration suppression system for a diesel engine comprises a first device for decreasing the amount of intake air to be inducted into the engine when operated. A second device is provided to heat the intake air when operated. Additionally, a third device is provided to detect a low engine speed and low engine load operating range, and to produce a signal in response thereto. The first and second devices are operated in response to the signal from the third device, thereby avoiding irregular combustion and misfire while suppressing engine speed fluctuation and torque fluctuation.

Abstract: The apparatus includes an inverter connected with the vehicle battery and/or generator and/or alternator for supplying power at external power source voltage and frequency, a resistance heater positioned adjacent the vehicle fuel tank and/or fuel lines, and a relay connecting the heater to an external power source or to the inverter. The relay is biased to connect the heater with the inverter, and has an actuating coil which connects the heater with the external power source. The actuating coil is connected across the relay terminals which may be connected to the external power source.

Abstract: A starting aid for an internal combustion engine comprises a tubular extension in the end of which is wound an electric heating element. Surrounding the extension is a tubular member which ever at least a substantial portion of its length is mounted on spaced relationship to the extension. The member is formed from heat resistant material and acts to minimize the temperature attained by the extension when the aid is in use.

Abstract: A fuel treating device comprises two pairs of magnets, one pair positioned on each inlet for fuel and oxygen so that the incoming fuel is exposed to a magnetic field. Each pair of magnets is positioned diametrically opposed about the inlet line with the south magnetic pole of each magnet placed upstream furthest away from the mixing zone. The magnets are insulated from each other and from the inlet line by nonmagnetic materials, such as Neoprene, which do not disrupt the magnetic field.