Abstract: An air intake apparatus for an internal combustion engine, the air intake apparatus includes: an air intake apparatus main body portion introducing air into a cylinder; a port portion provided integrally with a downstream side end portion of the air intake apparatus main body portion and inserted into an air intake port in a cylinder head; an air intake passage formed inside the air intake apparatus main body portion and the port portion, and through which an air-fuel mixture containing air and fuel flows; an injector provided in the air intake apparatus main body portion and introducing the fuel into the air intake passage; and a heater heating the fuel introduced by the injector. The injector is disposed at a position where the fuel is capable of being injected into the heater.

Abstract: The EGR gas distributor is attached to an intake manifold to distribute EGR gas to each of branch pipes constituting the intake manifold. The EGR gas distributor includes a gas distribution part including a gas inlet port for EGR gas, a plurality of gas outlet ports connected to each corresponding branch pipe, and a gas passage that extends by branching off into a plurality of branch sections from the gas inlet port to each gas outlet port. The gas passage has a tournament branch shape that extends by stepwise branching off from the gas inlet port to each gas outlet port and is symmetric about the gas inlet port. The EGR gas distributor includes a heating part provided adjacent to the entire gas distribution part to heat the gas distribution part. The heating part is constituted of a hot-water passage part configured to allow hot water to flow therethrough.

Abstract: An exhaust gas recirculation line may include an at least partially flexible body. The body may include a pipe section at an end. The pipe section may be closed on a front side and may include at least two openings on a jacket side.

Abstract: Various methods and systems are provided for an intake manifold for an engine. In one example, an insert comprises an annular body having a top surface, bottom surface, inner surface, and outer surface. The insert further comprises a first groove for coupling an intake air port of an intake manifold to a cylinder head, a second groove for circulating gaseous fuel received from a gas runner of the intake manifold, and one or more openings to fluidically couple the second groove to an interior of the intake air port. The insert is configured to mix gaseous fuel and intake air at a coupling location between the intake manifold and the cylinder head.

Abstract: A muffler includes a shell, baffles, and a plurality of pipes. The shell defines first and second end cavities and a central cavity. The end cavities have larger cross-sectional areas that a cross-sectional area of the central cavity. The baffles cooperate to form multiple chambers within the shell. A first inlet directs a first portion of the exhaust into a first chamber. A second inlet directs a second portion of the exhaust into a second chamber. A first pipe extends through first, third and fourth baffles and includes an inlet in the fourth chamber. The first pipe directs exhaust from the fourth chamber to a first outlet at the first end cavity. A second pipe extends through the second, third and fourth baffles and includes an inlet in the third chamber. The second pipe directs exhaust from the third chamber to a second outlet at the second end cavity.

Abstract: A variety of methods and arrangements are described for selectively reducing intake manifold pressure in a skip fire engine control system. In some embodiments, a throttle is adjusted to generate a manifold vacuum, which is used for various applications, including but not limited to purging a fuel vapor canister, reducing pressure within a brake vacuum booster reservoir and/or venting gas from a crankcase interior. An engine firing fraction is increased to help maintain a desired torque level. Other techniques for reducing the intake manifold pressure are also described, such as applications involving a return to idle.

Abstract: A liquid-cooled engine and method for its operation is described wherein the engine includes a cylinder head comprising at least one coolant jacket and exhaust manifold at least partially integrated therein. In one particular example, the exhaust pipes merge in stages within the cylinder head before merging into a common exhaust gas collector outside the cylinder head. Inclusion of a coolant system according to the present disclosure allows the thermal load of the cylinder head to be controlled, which thereby allows cooling to be achieved in a targeted manner inside the cylinder head by means of liquid cooling and forced convection.

Abstract: A manifold including first and second divider bodies each having a carburetor mounting flange. The first divider body includes a first and a second plenum, and the second divider body includes a third and a fourth plenum. A first pair of runners extends from the first port flange to the first plenum; a second pair of runners extends from the first port flange to the third plenum; a third pair of runners extends from the second port flange to the second plenum; and a fourth pair of runners extends from the second port flange to the fourth plenum. Accordingly, in operation, each plenum will present only one carburetor venturi to the cylinder in a low-RPM, low-throttle opening induction event, thus keeping the peak velocity through the carburetor's venturi high even at low RPM.

Abstract: A fluid-guiding housing, in particular a gas-, oil-, fuel- or water-guiding housing (12), of an internal combustion engine, in particular of a motor vehicle, with an electrically operated heating device (33) for heating fluid in the housing (12) is described. At least one wall (18, 20) of the housing (12) is equipped with an electrically heating textile (32).

Abstract: A method for operating an internal combustion engine including a combustion chamber and configured to perform at least a compression stroke and a power stroke. The method comprises direct injecting a first substance having a positive Joule-Thompson coefficient into the combustion chamber during a compression stroke, thereby reducing an amount of work otherwise may be used to perform the compression stroke and direct injecting a second substance having a negative Joule-Thompson coefficient into the combustion chamber during a power stroke, thereby increasing an amount of work otherwise produced from the power stroke.

Abstract: Disclosed is a fuel heating equipment of a diesel engine for preheating and heating fuel to supply the fuel to the engine. The fuel heating equipment of the diesel engine includes a main heating part having a collective tank, which is formed between runners connected to a first side of the engine and an exhaust pipe, and is heated by exhaust heat introduced from the runner, and a fuel supply pipe, which extends from a fuel tank and is wound around the collective tank to heat fuel, which passes through the fuel supply pipe due to heat conducted from the collective tank, so as to supply the fuel to the engine. The fuel heating equipment of the diesel engine further includes a preheating part provided such that the fuel supply pipe is inserted along the exhaust pipe to prevent the fuel, which is cooled by cold outside air in the winter season, from being directly introduced to the collective tank.

Abstract: A fuel injector system for raising fuel to its supercritical state and injecting the supercritical-state fuel to the combustion chamber of an internal combustion engine is disclosed. A plurality of injector embodiments provides alternative ways to heat the pressurized fuel to its supercritical state. Injection of supercritical fuel into the combustion chamber is known to improve fuel entrainment and reducing ignition delay to thereby increase combustion rate, which leads to an increase in fuel efficiency. According to some embodiments, the system provides for preventing coking that may otherwise occur in an exhaust gas heat exchanger used for preheating the high pressure fuel. In other embodiments, engine cold start assistance is provided by storing pressurized, heated fuel in an insulated container.

Abstract: A fuel conservation device for a combustion engine includes a heat-exchanging tube disposed through a heating coil that is contained within a housing containing coolant. The heat-exchanging tube is adapted to be coupled inline with a fuel line used to supply fuel from a gas tank to a fuel management device, such as a carburetor provided by the engine. In addition, the heating coil is configured to be coupled to an exhaust pipe coupled to the engine, so as to be heated by the hot exhaust gases generated as it operates. A radiator fluidly coupled to the housing cools the coolant, so that the fuel passing through the fuel line is maintained at a temperature just below the boiling point of the fuel.

Abstract: A snow blower is provided that includes a muffler and a heater box that has a top wall. The heater box has a plurality of side walls that extend from the top wall. The top wall and side walls define an interior of the heater box. One of the side walls defines a muffler aperture for use in venting exhaust gases from the muffler. The muffler is at least partially located in the interior of the heater box so that the side walls of the heater box surround at least a portion of all of the sides of the muffler.

Abstract: An ignition system for use with an engine is disclosed. The ignition system may have an igniter connected to selectively ignite a fuel mixture within the engine, an injector located to inject a non-combustible gas into the engine, and a controller in communication with the igniter and the injector. The controller may be configured to energize the igniter during a first mode of engine operation to ignite the fuel mixture, and cease energizing the igniter during a second mode of engine operation. The controller may also be configured to actuate the injector during the second mode of engine operation to promote auto-ignition of the fuel mixture.

Abstract: PTC electrical heating devices are disclosed which are suitable to vaporize air treatment chemicals from an impregnated slab, such as insect repellents. In one form an electrical contact to a PTC heater element is provided with a bowl-shaped contact head to reduce the risk of edges of the contact cracking the heater element. In other forms peg and recess structures interact with apertures on a heat transfer plate to facilitate assembly of the parts of the structure.

Abstract: A diverter, apparatus and method of bypassing an exhaust gas recirculation cooler in order to selectively cool recirculated exhaust gas is disclosed. The diverter relies on the Coanda effect to direct the exhaust gas flow to the cooler or to a bypass around the cooler and thus preferred embodiments do not require a valve to be provided in the exhaust gas flow for this purpose. This simplifies the assembly of the diverter and apparatus and provides for a more reliable diverter compared to certain known systems.

Abstract: A preheat fuel delivery system includes a fuel processor and a source of vaporized fuel. Vaporized fuel is feed into the inlet fuel port of the fuel processor. An outlet fuel port of the fuel processor is connected to an intake port of a combustion source. An exhaust port of the combustion source is attached to an exhaust intake port of the fuel processor. The heat from the exhaust gases of the combustion source heat the vaporized fuel inside the fuel processor. A first embodiment of the fuel processor contains a plurality of plates. A second embodiment of the fuel processor utilizes a plurality concentric tubes. A third embodiment of the fuel processor includes two concentric tubes.

Abstract: In a compression stroke and an exhaust stroke, a part of a mixture in a downstream intake passage 30b is introduced through a branch intake passage 50a into a crank chamber 20. The mixture introduced into the crank chamber 20 flows into a valve chamber 16 during the expansion stroke and the intake stroke. From which it flows back to an intake port 9 through a circulation passage 71, and is eventually charged into a combustion chamber 7 during the intake stroke. As the mixture passes through a first communicating passage 55 which allows fluid communication between the crank chamber 20 and the valve chamber 16, a gasoline component which is vaporized with comparative easy is vaporized by a heat released from a cylinder block 3 so that the mixture is separated into the lubricating oil and gasoline components.

Abstract: A preheat fuel delivery system includes a fuel processor and a bubbler fuel tank. The bubbler tank includes a fuel container, container cover, inlet supply line, and vapor outlet line. The inlet supply line and outlet line extend from the container cover. The vapor outlet line is attached to the inlet fuel port of the fuel processor. An outlet fuel port of the fuel processor is connected to an intake port of a combustion source. An exhaust port of the combustion source is attached to an exhaust intake port of the fuel processor. An exhaust outlet port of the fuel processor is connected to a muffler. The heat from the exhaust gases of the combustion source heat the vaporized fuel inside the fuel processor. Some of the exhaust gases may also be fed into the air inlet line of the bubbler tank to further increase fuel efficiency. A first embodiment of the fuel processor contains a plurality of plates. A second embodiment of the fuel processor utilizes a plurality concentric tubes.

Abstract: An engine cylinder block assembly for a V-type engine wherein inner walls of the cylinder banks define a relatively oil free valley which is closed by a rigid valley cover to provide additional stiffness to the inside walls of the blocks, thereby stiffening the block against vibration and bending. The valley cover also includes sealed pockets for enclosing knock sensors mounted upon upwardly extending bosses in the bottom of the valley to both protect the knock sensors and permit their removal without requiring removal of the valley cover from the engine cylinder block. Oil entrainment due to pulsing air flows between crank chambers of the engine are reduced by providing openings in the valley floor between the front and rear crank chambers of the engine while the adjacent inner crank chambers are separated from direct connection with the valley.

Abstract: The invention relates to an engine for an aircraft. The engine includes an engine housing having a drive shaft and a power output shaft. The power output shaft and the drive shaft are separately journalled within the engine housing. The power output shaft includes a propeller at a front end for providing propulsive thrust for the aircraft. The aft end of the power output shaft extends aft of the engine housing. The drive shaft is rotatably coupled to the aft end of the power output shaft by a gear train located outside and aft of the engine housing. The engine provides bearings which solidly support the power output shaft over a substantial portion of its length. This arrangement significantly reduces the loads which would be applied to the drive shaft and other engine components, and therefore, increases the service life of these components.

Abstract: A variable engine valve control system and method of operation thereof wherein each of the reciprocating engine valves is hydraulically or electrically controlled and can vary its lift schedule for various engine operating conditions. During part load operation of the engine, the intake valve is opened and the exhaust valve is closed during the exhaust stroke, prior to a piston's top dead center position, so that the intake port receives exhaust gas, which is then returned to the cylinder during the intake stroke to eliminate the need for an external exhaust gas recirculation system and to improve fuel evaporation into the intake air. Further, during part load, the intake valve is closed before the end of the intake stroke and the intake air is heated by a heat exchanger prior to entry into the cylinder to eliminate the need for air throttling without compromising the compression ratio and ignition characteristics.

Abstract: High-performance internal-combustion engine, particularly of the four-stroke type, including an engine block inside which combustion chambers are formed; each chamber slidingly accommodates a piston and is connected to at least one inlet duct for the air-fuel mixture and to at least one discharge duct for the burnt gases produced by combustion; these ducts are connected to the respective combustion chamber through valves. The internal-combustion engine has the particularity of including a converting-compensating device constituted by at least one pre-chamber mutually connecting at least two inlet ducts and at least one thermal contact chamber which is connected to at least one of the inlet ducts proximate to their outlet leading into the associated combustion chamber. This chamber is formed at the engine head and is in thermal contact with the associated combustion chamber.

Abstract: A fuel supply control device for an internal combustion engine in which fuel is injected from a fuel injection device (6) in an intake port (2.1) and air that flows into the intake port is mixed with the injected fuel to be supplied to combustion chamber (1) is shown, in which there are provided an intake control valve (20, 30) having a heater (7.3, 7.4) in the intake port and being capable of opening and closing the mixed gas flow passage. Control circuits (12, 13) carry out opening and closing position control of the intake control valve (20, 30) so that, at least during the time when the heater (7.3, 7.4) generates heat, the portion of the heat-generating region of the intake control valve (20, 30) may be located in the fuel injection range, with the valve (20, 30) functioning as a variable heater, variable intake valve and an AD port.

Abstract: The present invention relates to the engine-building industry and can find application in the fuel feed system of internal combustion engines for preconditioning part of the flow of a rich fuel-air mixture fed to the main flow to decompose liquid fuel and convert it into a gas. A technical aim of the present invention consists in an increased fuel economy of the engine, reduced toxicity of exhaust gases, and use of a cheaper low-octane fuel. A method for preparing fuel-air mixture consists in that the flow of an overrich fuel-air mixture is additionally heated, before mixing it with the other flow of fuel-air mixture, by passing it through a promoter heated above the mixture ignition temperature, thus providing repeated contact of the flow with the promoter surface.

Abstract: A superchargeable multi-cylinder 2-stroke cycle internal combustion engine employs opposite reciprocating mult-port slide valves in guideways on opposite sides of the engine block, to open and close cylinder air supply and combustion gas discharge conduits in several variations. Use of opposite multi-port slide valves driven from the engine crankshaft simplifies engine design, and improves scavenging of combustion gases from piston chambers of either spark-ignition or diesel engines. A preferred variation channels air supply and combustion gas discharge flows through dual passageways of opposite air preheating manifolds, to increase engine fuel efficiency, Further development of the preferred variation can result in production of simplified, compact, supercharged 2-stroke spark-ignition and diesel engines of improved design.

Abstract: An internal combustion engine having a fuel injection furnishing fuel to a cylinder via a cylinder head passage leading to a cylinder inlet valve and having an air inlet channel member furnishing air to the cylinder via the passage has a heating element having a heat sink and a PTC heating tablet on the heat sink recessed into an opening in the cylinder head or the air inlet channel to receive fuel from the fuel injector and facilitate mixing of the fuel and air being furnished to the cylinder substantially free of interference with the flow of the air to the cylinder.

Abstract: An intake device for a mixture-compressing internal-combustion engine has a heating element for heating the injected fuel downstream of an injection nozzle in the intake channel in order to avoid formation of fuel condensate which is harmful in the exhaust emission. The heating elements are configured in plate form and directed at an angle towards the injected fuel jet such that, on one hand, there is a good heating and, on the other hand, there is a low flow resistance by the heating elements. The plate heating element can be integrated in a flush and heat-insulating manner in the wall of the intake channel. By virtue of the low flow resistance which a plate-like heating element arranged obliquely in the fuel/air mixture flow produces, the heating surface can be made larged and consequently a rapid fuel heating can be achieved.

Abstract: A cylinder head of an internal-combustion enbgine with at least one inlet valve and a fuel injection in an air-intake channel has an evaporation element intended for improving the fuel/air mixture formation projecting into the air-intake channel. The evaporation element has high thermal conductivity in a partition wall between the inlet-valve channels in multi-valve engines and makes direct thermal contact between the air-intake channel and the main combustion space. The heating of the mixture mass located in the air-intake channel is thus self-regulated by the combustion heat in the main combustion space. The installation avoids the hitherto necessary resistance heating constituting a drain on the power supply and improves the heating regulation of the mixture mass.

Abstract: In multi-valve engines, a partition wall dividing the intake channel into inlet-valve channels as an evaporation element in the intake channel of a cylinder head of an internal-combustion engine for improving the fuel-mixture formation and consequently for reducing the emission of hydrocarbons. The partition wall is electrically heated by a heating bar and is subjected to fuel substantially tangentially from a fuel injection located at the intake channel. As a result of this configuration, the flow behavior of the mixture is optimized in terms of the installation of evaporation elements in the intake channel, and an improved transmission of heat to the mixture and a homogeneous mixture formation are achieved. In addition, sealing problems between the intake channel and the surroundings are solved in a simple way.

Abstract: Carburetors and fuel injection systems are used to facilitate a combustile mixture of air and fuel for internal combustion engines. Inherently, the fuel in this mixture is mostly in liquid droplets. However, it is the vaporous fuel which combines with the air gives an explosive mixture; and it is this mixture that can be exploded during the short engine power stroke time available. The rest of the fuel in liquid form simply burns or exhausts to the environment, hence impairing the efficiency of the engine and polluting the environment. In this invention, liquid fuel is vaporized and combined with air to form an explosive mixture before introduction into the engine. In this design, ultrasonic technology is employed to atomize the fuel in the form of fine fuel mist. This mist is then injected into a specially designed heat exchanger, in which hot engine exhaust gas is brought in to cause this subspension of fuel mist to vaporize.

Abstract: An internal combustion engine has a channel member such as a plenum chamber or cylinder head or the like with an inlet receiving air and fuel to form an air-fuel mixture and with a pair of outlets furnishing the air-fuel mixture to respective cylinders or groups of cylinders or to respective cylinder intake valve openings of two-intake engine cylinders or the like. A heating device mounted on the channel member has a heat-exchange surface which intercepts the air and fuel from the inlet to heat and fully vaporize the fuel to form the air-fuel mixture and also to divide the fuel mixture between the two outlets for furnishing the fuel mixture to the individual cylinders, groups of cylinders or intake valve openings.

Abstract: A fuel gasifier for an internal combustion engine having a gasification chamber, a device for injecting fuel into the chamber in droplets of about 30-50 microns or less in diameter, an ambient air inlet to the chamber with a flow control therefor, to admit a controlled amount of ambient air to mix with the fuel, a heater in the chamber to elevate the fuel temperature and convert the fuel to a gaseous state, a fuel and air mixing and transfer impeller in the chamber for increasing turbulence and propelling the mixture from the chamber, an annular venturi flow passage for flow of additional ambient air past the outside of the chamber, and a plurality of radial passages between the chamber and the venturi passage for flow of the turbulent mixture into the venturi passage and entrainment of the fuel and air mixture into the additional ambient air.

Abstract: This invention relates to a fuel heating device for internal combustion engines, in which both fuel heating means and fuel conductance passage are accommodated in the main body, constructed in such a manner that the fuel is injected after being heated while it passes the aforementioned fuel conductive passage to be arranged proximate to the combustion chamber of the internal combustion engine.

Abstract: A fuel supply device and heating device or system for an electrically controlled fuel injection engine has an air intake and a fuel injector arranged to direct air and fuel respectively into a cylinder inlet passageway leading to a cylinder inlet valve opening in an engine cylinder and has a heating device located in the passageway having a heating surface arranged to receive fuel from the fuel injector for heating the fuel and deflecting it or directing it into the cylinder through the cylinder inlet valve opening substantially free of condensing contact with walls of the passageway, thereby to assure that the proper ratio of air and fuel as provided by the electronic controls of the engine are properly received in the engine cylinder.

Abstract: The invention relates to a combustion engine with fuel injection system, having at least one cylinder with an air inlet passage, into which passage opens a fuel spray valve which is connected to a fuel pipe with pump. Disposed in the fuel pipe or on the spray valve is a fuel heating element with which the infed fuel can come into direct contact.

Abstract: The present invention proposes a fuel-air mixture-forming device for internal combustion engines, having a rotationally symmetric nozzle body (2) which, together with a rotationally symmetric throttle body (8) displaceable in it, forms a convergent-divergent nozzle which discharges into a radial diffusor (6). In the vicinity of the narrowest cross section (5) of the nozzle there is provided a fuel slot (11) extending around it and discharging into it, at least one fuel feed line (9, 10) discharging into the fuel slot. The radial diffusor is formed by a region of the nozzle body which is curved outward in the direction of flow of the mixture and by a wall (15) of a structural member (17) which forms a structural unit (18) with an intake manifold (7) of the internal combustion engine, the wall (15) lying opposite the nozzle body and being rotationally symmetric to the longitudinal axis (1) of the throttle member and having a bulge (16) pointing toward the throttle member.

Abstract: The invention relates to an intake system for a mixture-compressing internal-combustion engine, having a heating element of flat form which is arranged in the intake channel downstream of a fuel-injection nozzle. The heating element is intended for heating the fuel/air mixture and which, above a specific cooling-water temperature, can be transferred from a working position extending transversely relative to the direction of flow into a position of rest lying in the direction of flow. The invention also relates to the method of the heating element position and electrical controlling heating status.

Abstract: A diesel fuel heater for heating diesel fuel prior to its introduction into the diesel engine wherein said fuel heater comprises top and bottom covers and an elongate annular section. The fuel heater of the present invention heats the fuel by passing engine coolant across fuel carrying fuel tubes located in the heat transfer chamber.

Abstract: A device comprising a body in which is formed a chamber in which fuel is mixed with air; a cylindrical mixture delivery duct the opening of which is controlled by a throttle valve; and a body cover to which is fitted a fuel injector for supplying atomized fuel into the mixing chamber; the aforementioned mixing chamber comprising at least a first and second portion defined by differently tapered surfaces, and a third portion defined by a cylindrical surface equal in diameter to the aforementioned cylindrical mixture delivery duct; the axial length of the cylinderical surface of the third portion of the mixing chamber, measured between the axis of the throttle valve and the top edge of the third portion itself, being at least equal to the radius of the circular contour of the aforementioned throttle valve.

Abstract: An internal combustion engine is provided with a heat sink 6 with thermistor pellets 10, 22, 32 of PTC material. This heat sink is held in position inside a through passage for the fuel mixture through the action of clamp means 14; 17; 23; 33 which press the heat sink against the inside surface of the through passage. Obviously the heat sink is electrically insulated with respect to the engine. Advantages are that no plastics contact carrier and an opening in the wall of the manifold are needed and that the temperature peak is moved from the unloaded side towards the middle of the thickness of the thermistor pellets.

Abstract: A V-type four-stroke cycle internal combustion engine is provided with an exhaust manifold disposed in the valley of the V-shaped engine. The exhaust from the cylinders passes through the cylinder heads to an exhaust collection cavity formed in the exhaust manifold. The manifold is provided with water jackets above and below the exhaust collecting cavity to cool exhaust collected therein. An air intake manifold is also provided in the valley of the V-shaped engine, located above and adjacent the exhaust manifold. The air intake manifold has a central cavity, with induction tubes extending from the manifold to outside the valley of the V-engine for introducing air to the cylinders therefrom. The induction tubes provide induction tuning to the engine, to increase the torque provided by the engine. The arrangement of the engine components provides compact packaging for a V-type engine.

Abstract: A flow system for an engine-pump assembly utilizes the engine cooling water for heating the engine carburetors to prevent icing thereof and includes a flow indicator providing a visual indication of the condition of the engine's cooling water flow.

Abstract: In an intake manifold for a multi-cylinder air-fuel mixture suction type engine according to the present invention, the manifold body is formed into a simplified hollow shell-shape which is elongate bilaterally. And a carburetor is installed on the one end side of the front wall of the manifold body in the state of facing obliquely to the other end side of the back plane thereof. Therefore, the liquid fuel particles in the air-fuel mixture sucked into the manifold body from the carburetor are distributed nearly uniformly to every cylinder through each intake port arranged bilaterally in the back plane of the manifold body, and hence the density of the air-fuel mixture in every cylinder can be nearly uniformized.

Abstract: A method and apparatus for operating an internal combustion engine that substantially improves the fuel efficiency by utilizing heat normally discharged to the ambient to condition and prepare the fuel mixture prior to entry into the combustion chambers. The apparatus comprises a fuel vaporizer, a fuel mixture heater and a mixture homogenizer located in a fuel mixture flow path intermediate the vaporizer and the heater. The fuel vaporizer includes structure defining an inner heat exchange chamber which receives air and entrained fuel discharged by a fuel introducing device such as a carburetor. The fuel mixture is heated and at least partially vaporized by engine waste heat derived from the engine cooling system or alternately the engine exhaust system.

Abstract: A fuel vaporizing device for use with a carburetor to more efficiently vaporize and distribute the fuel portion of the air/fuel mixture. The device is mounted between the carburetor and intake manifold and positions a hot plate element in the flow path of each carburetor barrel discharge. Each hot plate is comprised of a solid metal disk in which a plurality of through bores are formed. Heat is supplied by a conduit extending through the disk, but does not intersect any of the through bores. The conduit is connected to both the intake and exhaust manifolds so that hot exhaust gas passes therethrough at relatively high velocity. To assure uniform flows of exhaust gas, an exhaust reservoir is provided in the connecting line between the exhaust manifold and the vaporizing device.

Abstract: In an engine system wherein the engine coolant is permitted to boil and the gaseous coolant used as a vehicle for removing heat from the engine, a heating jacket associated with the induction conduit of the engine is supplied with gaseous coolant via a control valve during cold engine starts and during modes of engine operation wherein it is advantageous from the view point of fuel economy to raise the temperature of the engine and/or the incoming fuel charge. The supply is terminated under other modes of operation to avoid heating the incoming charge and reducing charging efficiency.

Abstract: This invention relates to an internal combustion engine cooled by water and provided with a Diesel oil heater, wherein the exchanger of the heater is fixed directly to the cylinder head of the engine, the two surfaces in contact being coupled to each other, and this cylinder head comprises, on its face on which the exchanger is applied, orifices which place it in communication with the space in the exchanger through which the water cooling the engine passes.

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.