Abstract: An injection-molded, plastic fuel distribution insert for an internal combustion engine having a wet manifold promotes complete fuel atomization and vaporization. The fuel distribution insert also provides for even fuel distribution to the various combustion chambers. The fuel distribution insert preferably has a flange integral with one or more downwardly extending shrouds. Each shroud defines a subchamber having a volume substantially less then the volume of the manifold plenum. A fuel-air mixture from a fuel-air supply source enters into the shroud at the inlet of the intake manifold and is retained within the shroud until the mixture exits one or more exit windows in the shroud. The exit windows in the shroud are placed to promote even fuel distribution.

Abstract: The present invention is a flow focusing and mixing device for use with internal combustion engines. The flow focusing and mixing device may be located in the exhaust stream of an internal combustion engine for increased oxidization of the exhaust, increasing the air quality of the exhaust released into the environment.

Abstract: An induction system and control method for an internal combustion engine that will improve running under low speed, low load conditions by increasing turbulence in the combustion chamber through the use of a control valve positioned in the induction system for the engine. Under high speed, high load conditions, the control valve is held in an open position and thus, the engine is capable of obtaining high output since there is no restriction to the intake air flow. In addition, transient conditions of the engine, such as variations in idle speed, variations in the amount of EGR, changes in speed, such as acceleration or deceleration, starting and warmup, are compensated for by positioning the throttle control valve to obtain optimum performance, and in some instances, the amount of fuel supplied to the engine is also varied so as to improve exhaust emission control and reduce fuel consumption.

Abstract: An air induction system (10) for use with an internal combustion engine which includes a throttle body (24) mounted to an intake manifold housing (12). The manifold housing (12) includes an incoming flow passage (20) and a series of annular grooves (32). The annular grooves (32) are located between the throttle plate (30) and the incoming flow passage (20). These grooves (32) create turbulence in the air stream for improved performance under certain engine operating conditions and also act as moisture and contaminant traps.

Abstract: A fluid injection nozzle is used with a fuel injection valve of an internal combustion engine and is capable of controlling its fluid injection angle to a desired value when the fluid is atomized for injection. The fluid injection nozzle is fixed to the outlet portion of the injection port of the fuel injection valve and includes a first orifice plate having a first orifice and a second orifice plate having a second orifice. The first and second orifice plates are laid one above another so that the first and second orifices intersect each other to provide a through-hole in the direction of thickness of the plates. With such an arrangement, the fuel injection angle of the nozzle is controlled on the basis of the ratio of the area of intersection of the downstream side opening surface of the first orifice with the upstream side opening surface of the second orifice with respect to the area of the downstream side opening surface of the second orifice.

Abstract: An arrangement for the pressure atomization of liquid fuel and process for the same.An arrangement for the pressure atomization of liquid fuel, preferably with an atomizing nozzle charged with pressurized fuel. A reaction chamber (10) with at least one ultrasonic oscillator (26) is disposed in the fuel line (32) before the atomizing nozzle. The reaction chamber (10) is preferably charged with oxygen-enriched air, liquid fuel and water. For the homogenization of the mixing components a mechanical cavitation element can be disposed in the reaction chamber (10). The cavitation element preferably comprises a rapidly rotating, discus-shaped disc having axial bores. The fuel mixture created in the chamber (10) in the form of a fine foam is combusted with a high degree of efficiency, nitrogen oxides do not result, particularly whenever oxygen-enriched air is used.

Abstract: A fuel injection apparatus in which the state of vaporization of the fuel in the internal combustion engine is improved by making the fuel spray injected from the fuel injector not strike the umbrella portion of the intake valve from the front, but be oriented to a position shifted to the right or left of the stem so that the majority of the spray flows in to a valve seat clearance of an annular groove shape formed between the valve face and the valve seat and causes a swirl in the same. The wet amount of the fuel depositing as a liquid film on the umbrella portion and the inner surface of the intake port, which is difficult to evaporate, is reduced.

Abstract: An air valve particularly intended for use with air intake manifolds of the type employed with fuel injected, internal combustion enginers, comprising a valve base adapted to be mounted to the plenum of the air intake manifold and a separate valve body sealingly engageable with a seat formed in the valve base. The valve body is formed with a number of inlet bores, each of which carry a rotatable throttle blade, and these inlet bores align with discharge bores in the valve base each having a radiused outlet edge or lip.

Abstract: An air distributor for use between a super charger and the inlet manifold of an internal combustion engine to uniformly distribute compressed air from the super charger to the combustion chambers of the internal combustion engine and to cool the air. The distributor includes a substantially rectangular body having an enlarged opening therethrough and top and bottom surfaces. Top and bottom plates extend along and are secured to the top and bottom surfaces respectively of the body. The top plate has an air inlet opening therethrough adjacent one end thereof. The bottom plate has first and second spaced air outlet openings therethrough. A plurality of ribs are in the opening in the body and between the top and bottom plates to form air passages which distribute the flow of air from the air inlet opening substantially uniformly along the air outlet passages. The body has fins on its outer surface which serve to cool the body and the air therein.

Abstract: An induction system and control arrangement for a three valve per cylinder engine, wherein the induction passages are tuned to provide different effective lengths for different engine running conditions. In addition, a control valve arrangement is provided for controlling the flow to the combustion chambers through the valve seats to generate unrestricted flow under high-speed, high-load conditions and tumble and/or tumble and swirl for promoting turbulence under low-speed, low-load conditions.

Abstract: An apparatus including a first chamber in operative communication with a carburetor to receive carburetor fluid flow therefrom, directing such fluid flow through a central conduit into a second chamber in operative fluid communication with an intake manifold of an associated internal combustion engine, such that the central conduit is arranged for the heating and associated gaseous flow from the carburetor to the intake manifold.

Abstract: An electronic fuel injector control is provided for selectively activating fuel injectors for introducing macroscopic liquid fuel droplets into the vacuum chamber of a device for converting fuel into microscopic fuel droplets and fuel vapor. The control has a rotatably mounted rotor shaft, connectable to the rotor in the vacuum chamber and fuel conversion signal device to provide first periodic signal pulses responsive to the angular rotational position of the rotor shaft. Engine sensor electronics is responsive to input signals from engine sensors indicative of engine condition and is further responsive to an output signal pulse from the fuel conversion signal device each time the vane sweeps past the fuel injector. A sensor is provided which is responsive to the desired angular position of the engine crankshaft to provide second periodic signal pulses.

Abstract: An intake flow booster is provided for insertion between the carburetor and intake manifold of an internal combustion engine which includes a series of downwardly depending tubes having an internal frustro-conical shape. The fuel/air mixture leaving the carburetor passes through a well in the manifold plate and into the manifold tubes whereby the mixture flows more efficiently to the engine providing a higher performance and greater horsepower.

Abstract: A flow proportioning mixer is provided for mixing gaseous fuel and air, the mixer having therein a gas chamber adapted to discharge the gaseous fuel to a mixing channel, an air chamber adapted to direct the air into the mixing channel to mix with the fuel, a plunger reciprocally mounted in the mixing channel to define an annular passage in the channel, a pressure regulator for maintaining the pressure of the gas in the gas chamber and the air in the air chamber at a selected ratio, and a motor responsive to an engine exhaust content sensor to move the plunger in the mixing channel.

Abstract: A fuel dispersion device has been provided in the form of a vacuum pump in which fuel is injected as macroscopic fuel droplets in metered quantities into a vacuum chamber in the pump where it is converted to a converted fuel in the form of a mixture of a smaller percentage of gaseous fuel and a larger percentage of microscopic liquid fuel droplets. This converted fuel is moved from the inlet to an outlet port by sweeping vanes. A combination of vacuum, expanding absorbed gases, mechanical energy and thermal energy is used to create gaseous fuel and microscopic liquid fuel droplets from macroscopic liquid fuel droplets. An air intake passageway is provided at one end of the mixing chamber at substantially right angles to the outlet from the vacuum chamber. An air-fuel discharge passageway is provided on the opposite side of the intake passageway for supplying the mixture of air and converted fuel to the engine for combustion.

Abstract: The atomizer fits over the outlet of the fuel injector and comprises a thimble-shaped inner part that nests within a thimble-shaped outer part. Both inner and outer parts comprise holes in their end walls through which injected liquid fuel from the injector outlet passes. The inner and outer parts cooperatively define passages through which assist air is conveyed to the aforementioned holes to aid in the atomization of the injected fuel. Several embodiments of atomizers are disclosed.

Abstract: An exhausted gas recycle device which is installed in an intake manifold is comprised of an inlet portion which penetrates into the intake manifold and communicates with an exhaust manifold and at least one hole formed on the inlet portion in the intake manifold.

Abstract: Fuel supply in an ultrasonic atomizer is conducted according to a fuel increment ratio pattern in which the increment of fuel in fuel increment control for starting and warming up is 70% or less of that in a typical conventional pressure injection valve system, thereby improving startability, accelerability and fuel consumption rate and further enabling a reduction in exhaust emissions. When the engine is started in low-temperature conditions, the fuel is supplied by continuous injection to make uniform and reduce the mean diameter of droplets of atomized fuel, thereby improving the ignitability and startability. The fuel injection start timing is varied in accordance with the combustion chamber temperature at the time of starting the engine, i.e.

Abstract: A device for damping the intake noise in internal combustion engines employs the air intake path (1,5,6) of the diesel engine within which path there is arranged a convergent-divergent nozzle (4) wherein cross section of passage is adjustable by means of a throttle member (3) which can be displaced as a function of a loading of the engine.

Abstract: A fuel injection system comprises a fuel injection valve of the fuel swirling type which is provided in an intake passage upstream of an intake valve that is arranged in an inlet port, the fuel injection valve being equipped with an adapting device for adapting the form of the fuel spray, which is injected through the fuel injection valve in a swirling manner, to the configuration of the inlet port as seen from the position where the fuel injection valve is mounted. With this structure, the fuel can be prevented from impinging on the upper and lower walls of the inlet port, thereby preventing the fuel injected into the combustion chamber forming a liquid film. This helps to enhance the combustion efficiency of the associated internal combustion engine and to reduce the HC content in the exhaust gas, thereby improving the starting performance at low temperature of the engine.

Abstract: An air flow system for an internal combustion engine comprising an air cleaner and a swirling device disposed therein and having a plurality of vanes with at least one elongated slit for causing the air to swirl thereby improving the properties of the air fuel mixture and improving the performance of the engine.

Abstract: An airblast fuel injector tip is provided for reducing fuel vaporization problems as a result of high fuel temperatures without adversely affecting the airblast operational characteristics of the injector tip. The injector tip includes a fuel receiving chamber and a fuel discharge orifice downstream thereof and an arcuate, distensible, tubular valve member having a discharge end movable relative to a valve seat in the fuel receiving chamber in dependence on the pressure of fuel in the valve member to meter fuel to the fuel receiving chamber for discharge through the discharge orifice into a combustor.

Abstract: The present invention seeks to provide a simple, low cost and easy-to-install (or remove) device for two-cycle engines which improves engine efficiency through more complete combustion, resulting in increased engine rpm and a decrease in emissions. The invention specifically relates to an insert device which is located upstream of the carburetor, preferably in a coupler which typically extends between an air cleaner and the carburetor of a two-cycle engine. The insert itself is generally formed as a tubular member (of one or more pieces) tapering from a larger inlet side to a smaller outlet side, with or without surface irregularities, i.e., ribs, flutes, etc., formed on its interior surface. It is important that the tuned air insert be located such that its lower edge, i.e.

Abstract: A system for operating a two-cycle spark ignition engine, comprising an ultrasonic atomizer that is disposed in an intake pipe of the spark ignition engine. When the engine is to be started, a fuel for starting is supplied to the ultrasonic atomizer, and after the engine has been started, a gas oil is supplied to the ultrasonic atomizer to atomize and spray it into the intake pipe, thereby enabling an increase in the flow rate of fuel atomized and sprayed by the ultrasonic atomizer and realizing combustion of gas oil, and thus achieving a lowering in the fuel cost, ensuring safety and making it possible to provide a lightweight emergency pump unit which is suitable for use in vessels, for example.

Abstract: The constant velocity intake manifold is designed to provide an increased velocity of the fuel-air mixture into the reed valve (engine inlet port) of a two-cycle engine. The present design of feeding device transmitting the fuel-air mixture eminating from the carburetor into the manifold has a passageway of such considerable cross-sectional area that the linear velocity of the mixture is decreased considerably. The device described herein reduces this passageway cross-sectional area to increase the linear velocity of the mixture passing therethrough. The new manifold has an extension which reaches into the adjoining reed valve cage to also reduce the cross-sectional area of the passageway feeding into this cage and thereby increases the linear velocity of the fuel-air mixture passing into this cage.

Abstract: An improved throttle modulator assembly and a thermoplastic fluid direction tube for insertion into a throttle modulator assembly are disclosed. The thermoplastic fluid direction tube is annular and hollow and is made from a thermoplastic material having a coefficient of thermal expansion about the same as the throttle modulator body. Further, an annular press ring and at least one associated press wing extending axially therefrom are located along the longitudinal dimension of the end tube portion of the thermoplastic tube.

Abstract: Disclosed herein is an emission control device for use with a carburetor having a base and at least one fuel opening defined in its base. The device is comprised of a body member of predetermined thickness and defining therein at least one through opening. The through opening communicates with the fuel opening in the carburetor. The device also has an air passageway largely defined in its surface. The air passageway communicates with the through opening. The passageway lies generally adjacent the carburetor and the fuel opening so that air passed through the passageway passes into the through opening and under the fuel opening.

Abstract: An arrangement for injecting fuel for an internal combustion engine has at least one inductive injection valve which is switch controlled via a controllable semiconductor switch. This injection valve is provided with an inductive or capacitive oscillator component for atomizing fuel. During the switching control operation, electrical energy from the inductive injection valve is fed into the oscillator component for exciting its oscillating movement each time the semiconductor switch is opened. On the one hand, with this arrangement no separate high frequency generator is required for the oscillator component while, on the other hand, a second transistor is not required for the switch-controlled output stage with a rapid discharge without loss being possible at least in principle.

Abstract: A vaporizing nozzle which comprises a wall (16) of porous material through which a liquid to be evaporated percolates from one side thereof into a gas stream at the other side thereof and a thermoelectric device (30) located at or adjacent the wall of porous material whereby to regulate the temperature thereof. A computer is provided, with a read only memory (ROM) or equivalent containing a "map" of the air to fuel ratio required for given values of the various parameters and compares the sensed values with the map held in memory and sends an appropriate signal to thermoelectric device controller which responds by sending a current of the correct magnitude and polarity to the device such that the device, which is in close proximity to the wall heats or cools the surface of the wall to a desired level thus regulating the flow or fuel therethrough.

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: A gas-air mixer for internal combustion engines having an inlet and an outlet diffusor and being mounted in a collar member which forms a cyclindrical surface between them. Feeding channels are disposed between the inlet and outlet diffusors which terminate at the external side of the diffusors in a concentrically shaped annular channel. Both diffusors are constructed as separate bushings. The outlet diffusor is fixedly mounted in the collar and the inlet diffusor is movably mounted in the collar, around its axis by means of a control lever. The diffusors are seated end face to end face and an outer cylindrical surface mutually defined by them through which have been cut radial slots form feeding channels for gas fuel. By turning of said diffusors with respect to each other the cross-section of the feeding channels is adjusted depending on the angle of rotation of the inlet diffusor around its axis different operating regimes of the engine.

Abstract: In a fuel supply system for internal combustion engine provided with a fuel injection valve and an ultrasonic atomizer on suction pipe of the engine, the tip of the oscillator member of said ultrasonic atomizer is furnished with an inclined portion and a portion with reduced portion further ahead of said inclined portion. By arranging a fuel supply passage face-to-face to this inclined portion, the shape of the oscillator tip is modified, and it is possible to maintain adequate atomizing angle regardless of the quantity of supply fuel without attaching the fuel on inner wall of inlet pipe, to increase the turndown ratio and to achieve even spraying all over the circumference. Also, it is possible to shorten the starting time when external air temperature is low and to increase the combustion performance and the exhaust property, particularly, in an engine using the fuel difficult to ignite at low temperature such as alcohol, kerosene, etc.

Abstract: The invention solves the problem of feeding spark ignition engines with fuel and obtaining high total efficiency of engines. The method is characterized by that for supply control the signals of pressures of the medium in determined sections of the suction pipe passage are used. The fuel medium is subject to ultrasonic vibration with the frequency of from 20 kHz up to 60 kHz. The atomized medium is treated with an air stream. The device is equipped with an ultrasonic unit /1/ provided with an ultrasonic transducer /21/ to atomize the medium, connected with the control system of the fuel medium supply before feeding the medium to cylinders. The ultrasonic unit /1/ is provided with at least one intermediate channel /16/ to feed the fuel medium, connected with at least two output channels /18/ leading to the radiant surface b /20/ of the waveguide /19/ The device provides for high production yield of the mixture.

Abstract: An airblast fuel injector tip is provided for reducing fuel vaporization problems as a result of high fuel temperatures without adversely affecting the airblast operational characterisitics of the injector tip. The injector tip includes a fuel receiving chamber and an arcuate valve member movable relative to a valve seat member having a fuel discharge port for discharging fuel flow into the fuel receiving chamber as metered by the valve member in dependence on the pressure of fuel. The valve seat member is adjustably received on the injector tip and preferably includes a deflectable portion accessible externally of the injector tip for facilitating adjustment of the valve cracking pressure.

Abstract: An air flow system for an internal combustion engine comprising an air cleaner and a swirling device disposed therein having a plurality of vanes for causing the air to swirl thereby improving the properties of the air-fuel mixture and improving the performance of the engine.

Abstract: An airblast fuel injector tip is provided for reducing fuel vaporization problems as a result of high fuel temperatures without adversely affecting the airblast operational characteristics of the injector tip. The injector tip includes a fuel receiving chamber and a fuel discharge orifice downstream thereof and an arcuate, distensible, tubular valve member having a discharge end movable relative to a valve seat in the fuel receiving chamber in dependence on the pressure of fuel in the valve member to meter fuel to the fuel receiving chamber for discharge through the discharge orifice into a combustor.

Abstract: A throttle body adapted to be mounted between an intake pipe and an intake manifold, the throttle body comprising an upstream body connected to the intake pipe and formed with a substantially horizontal suction passage; a downstream body connected to the intake manifold and formed with a downwardly inclined throttle bore, the throttle bore continuously extending from the suction passage on a downstream side thereof; a throttle valve rotatably mounted in the throttle bore of the downstream body; and a fuel injector mounted to the upstream body in such a manner as to inject fuel toward the throttle valve; wherein the fuel injected from the fuel injector collides with the throttle valve to be atomized and distributed in the downstream body, and is supplied to the intake manifold.

Abstract: A device for improving a fuel-air mixture distribution in multi-cylinder internal combustion engines, in which a mixture forming device (carburetor, central injection unit) must supply more than one cylinder. By means of the device a quantitatively and qualitatively uniform distribution of the air-fuel mixture to the various cylinders is effectively improved. This more-uniform distribution of the mixture is obtained by combining a plurality of nail-like protrusions and a guide wall downstream of the fuel-air mixture device at which an effective transfer of heat produced by a heating element takes place, with which the flow condition are varied prior to the division of the intake tube into intake line arms. It is particularly effective to dispose the device at the "hot spot" of downdraft intake tubes in multi-cylinder engines.

Abstract: A fuel injecting apparatus for an internal combustion engine, comprising a suction manifold and a throttle valve assembly connected to the suction manifold and provided with a fuel injector and a throttle valve.

Abstract: An induction system for an internal combustion engine that has, in addition to the conventional main intake passage, a relatively small cross-sectional auxiliary intake passage which discharges into the main intake passage upstream of the point of communication of the main intake passage with the engine chamber and downstream of the throttle valve of the engine. A relatively large capacity plenum chamber feeds the auxiliary intake passage so that on the intake cycle a high velocity charge will be delivered from the auxiliary intake passage into the chamber to increase turbulence and improve the combustion efficiency.

Abstract: Structure and a method for introduction of a mixture of fuel and air into the combustion chambers of an internal combustion engine which has a plurality of combustion chambers. Each combustion chamber having an intake port region which leads to the combustion chamber. The structure has an inlet manifold which has fluid communication with the intake port region of each of the combustion chambers. The structure also has an outlet manifold which has fluid communication with the intake port region of each of the combustion chambers. A fluid pump forces continuous circulation of the mixture of fuel and air flows from one manifold to the other manifold as the two manifolds are arranged in series relationship. Thus, at any given period of time, the same quantity and the same composition of fuel and air is available at all of the combustion chambers, and engine operation is enhanced.

Abstract: An air fuel mixing device for internal combustion engines comprises a ring section having air passages leading to an interior volume, a cap section for supplying fuel, and a mixing body disposed between the cap section and ring section. The mixing body includes a frusto-conical member through which a plurality of fuel passages extend parallel to the cone axis. The fuel passages form fuel outlets in a frusto-conical surface disposed in the interior volume and facing the air passages. Incoming air passes across the fuel outlets to suck fuel into the interior volume. Depressions in the frusto-conical surface induce turbulence in the incoming air to promote mixing of air and fuel. The ring section comprises relatively rotatable rings with mutually alignable slots for forming the air passages. The slots are selectively misalignable to a desired extent for regulating the amount of incoming air so that the mixing device can be suited to the different needs of various engines.

Abstract: A liquid atomizer utilizes a plurality of laminated piezoelectric elements for converting electrical oscillation into mechanical vibration, a circuit for generating resonance frequency of a low DC voltage, the circuit being electrically connected to the piezoelectric elements and including a charging circuit for forcibly causing electric charge based on said DC resonance frequency voltage to flow from a DC power source into the laminated piezoelectric elements and a discharge circuit for forcibly causing electric charge stored in the laminated piezoelectric elements to be discharged.

Abstract: An electromagnetic fuel atomizer for internal combustion engine applications which includes a generally C-shaped core of integral ferromagnetic construction having arms which form a pair of flat parallel surfaces spaced from each other to form a gap therebetween. The core structure is characterized by a fundamental resonant frequency determined in part by mass and elasticity of the core structure, and the ferromagnetic core is electromagnetically energized at such fundamental resonant frequency. Liquid fuel is supplied to the gap between the core arm surfaces, and standing waves are generated therein as the core arms vibrate with respect to each other. As amplitude of oscillations and such standing waves increase, fuel droplets break away from the standing wave nodes and are aspirated into the engine.

Abstract: In an internal combustion type engine having a piston disposed within a cylinder, a plurality of ceramic cylinder inner surface sections are provided for covering surfaces of the cylinder chamber and the piston which are directly exposed to the ignited combustion gases as the piston travels through its stroke. Same are for the protection of the metal structure of the engine from exposure to the heat generated within the cylinder.

Abstract: An apparatus for improving the combustion in the engine cylinders and simultaneously reducing the pollutants in the exhaust gases from the engine and directs a portion thereof into a mixing chamber where it comes into intimate contact with air/fuel mixture to preheat the air/fuel mixture. The mixing chamber is provided with a centrally located stator vane assembly which imparts a swirling motion to the gases therein. The base of the stator vane assembly serves as a heat sink to conduct and transmit heat to the stator vanes since its upper and lower disk-like surfaces are exposed to the hot exhaust gases which have been recycled back into the engine.

Abstract: The ultrasonic atomizer system serves to atomize fuel to be injected into internal combustion engines, thereby forming droplets of identical diameters (d.sub.T). The ultrasonic atomizer system includes an atomizer housing having a pressure chamber into which fuel is delivered under pressure by a pump. An ultrasonic vibrator protudes into the atomizer housing. Transport lines that transmit the vibrations lead from the pressure chamber to nozzles on the air intake tubes of the engine. A plurality of injection ports are provided in each of the nozzles and the streams of liquid emerging from the injection ports of each nozzle are made to undergo a monodisperse disintegration by the vibrations of the ultrasonic vibrator to form droplets of equal diameter (d.sub.T).

Abstract: A fuel injection supply system for an internal combustion engine provided with an even number more than four cylinders. The first intake manifold is connected to the first cylinder group comprising one half of the cylinders and the second intake manifold is connected to the second cylinder group comprising the other half of the cylinders. A passage collector member is provided which collects the intake passages so as to communicate the intake ports of the first and second manifolds each other, and the first fuel supply device is disposed at the converging portion of the first intake manifold and the second fuel supply device is disposed at the converging portion of the second intake manifold.

Abstract: An ultrasonic wave type fuel atomizing apparatus for an internal combustion engine provided in an intake passage of the internal combustion engine and atomizing the fuel injected from a fuel injection pump by the ultrasonic wave vibration includes an ultrasonic wave vibrator, an oscillation circuit for generating ultrasonic waves for driving the ultrasonic wave vibrator, and a high voltage generating coil for boosting the output of the oscillation circuit and for applying the driving output to the ultrasonic wave vibrator, and furthermore, a feedback circuit is included to detect a current flowing through the high voltage generating coil and to control an oscillation frequency of the oscillation circuit thereby to make the driving frequency follow the resonance point of the ultrasonic wave vibrator.

Abstract: A device is disclosed for use in conjunction with the carburetor of an internal combustion engine for economizing fuel consumption and reducing emission levels. The device includes a mixer element in the form of a spiralling cone frustum, seated in a mounting plate which is provided with a radial bore designed to admit air or other liquid or gas into the inlet manifold.