Abstract: For a fuel injection device, a configuration to improve fuel sealability when a valve is closed is provided. Therefore, the fuel injection device includes: a valve body that opens and closes a fuel flow path; a movable iron core in which a fuel passage hole communicating an upstream side and a downstream side is formed, and that operates the valve body toward the upstream side; a biasing spring whose one end contacts the movable iron core, and that biases the movable iron core in a valve opening direction; and a regulating unit that regulates movement of the one end of the biasing spring, in which the shortest distance between the one end of the biasing spring and the fuel passage hole is larger than a radial travel distance of the one end until radial movement of the one end is regulated by the regulating unit.

Abstract: An article of manufacture for providing an automobile turbocharging fitting is disclosed. A turbo fitting is a funnel shaped device that is attached to an outgoing airflow port of an air filter intake enclosure and secured into an air flow line running to the input to a throttle body of an internal combustion engine. The inner diameter of the turbo fitting is reduced from its width at the air filter enclosure to its exit diameter in the air flow line. Air directional devices, which may be raised tabs or grooves, running the length of the inner surface of the turbo fitting. These air directional devices are oriented in a clockwise direction when viewed into the turbo fitting from the air filter enclosure end.

Abstract: An air reactivator includes a plurality of first ribs, a plurality of second ribs, a plurality of diffusion members, and a plurality of air passages. Each of the first ribs has a first top face and a first bottom face and two first inclined faces. Each of the second ribs has a second top face and a second bottom face and two second inclined faces. The diffusion members are defined at connections of the first ribs and the second ribs. Each of the diffusion members has a projection and a third bottom face and a recessed portion. Each of the air passages is defined between the first inclined face, the second inclined face, and the recessed portion. The first ribs, the second ribs, and the diffusion members are made of a mixture of far infrared emitting material and polymer material.

Abstract: An intake system of engine comprises an intake pipe (8), an air intake manifold (6), and an auxiliary intake assembly (4) disposed on the intake pipe (8) and located before the air intake manifold (6) of an engine. The auxiliary intake assembly (4) comprises an auxiliary air inlet passage, an auxiliary air outlet passage (21), and a central passage (39). Air enters through the auxiliary air inlet passage, comes out from the auxiliary air outlet passage (21) and enters the central passage (39), so as to be mixed with air from the intake pipe (8). The present invention further relates to an engine intake system, comprising an electronic booster (4?) located upstream of the air intake manifold (6) of an engine. An air flow enters from an air inlet (4241?), flows out from an air outlet (4242?), is mixed with air that flows through the intake pipe (8), and then is inhaled into a cylinder of the engine. The present invention further relates to a engines comprising the above intake systems.

Abstract: A dual-fuel fuel injection system for an internal combustion engine has a liquid fuel injection branch and a gas fuel injection branch, in which a gas injector assembly that is controllable via a control fluid is situated. The liquid fuel forms the control fluid of the gas injector assembly.

Abstract: An elastic connecting support for arrangement between a combustion engine and an air filter of a handheld work apparatus is disclosed. The connecting support has a first channel for largely fuel-free air and a second channel for a fuel/air mixture. The connecting support is realized as a single piece, and has, on a first side, an engine connecting flange, at which the first and second channel end, for connection to the combustion engine. The first channel has a first peripheral wall and the second channel has a second peripheral wall. The first peripheral wall and the second peripheral wall are arranged at a distance in relation to each other in a longitudinal section of the connecting support. The channels extend from the first side to a second side of the connecting support. On the second side, the first channel and the second channel end at a common connecting flange.

Abstract: Methods and systems are provided for a vacuum generating device. In one example, a vacuum generating device comprises a venturi device upstream of an annular fixture for adjusting an amount of vacuum provided to a vacuum consumption device.

Abstract: Exhaust temperature management strategies for an opposed-piston, two-stroke engine with EGR are based on control of a ratio of the mass of fresh air and external EGR delivered to a cylinder to the mass of the trapped charge (density of the delivered charge multiplied by the trapped volume at port closing).

Abstract: A throttle body fuel injection system and method that is arranged to easily replace four-barrel carburetors includes a throttle body assembly with four main bores, each with a throttle plate and an associated fuel injector. Each injector feeds fuel into a circular fuel distribution ring via a fuel injection conduit, which introduces pressurized fuel into the air stream. The fuel distribution rings and bores have profiles that avoid constrictions for to prevent low pressure zones according to the Venturi effect. Fuel is injected through downward-facing outlets at or near the bottom end of the rings. The fuel injection rings are two-piece, each formed of an insert pressed into an outer housing. The insert includes axial grooves intervaled about its exterior circumference of insert that are joined by a circumferential groove formed about the insert. The grooves are in fluid communication with a conduit that supplies fuel from a fuel injector.

Abstract: Methods and systems are provided for a mixer. In one example, a system may include a mixer with three separate portions, each portion comprising a plurality of misaligned perforations.

Abstract: The purpose of the present invention is to provide a combustion device for improving a turndown ratio, which is capable of stably implementing a combusted state in a low-output load region by improving a turndown ratio of a burner. To this end, the present invention provides the combustion device having a premixing chamber (300) which is connected to an air supply tube (100) and a gas supply tube (200), and which has a space for premixing air and gas provided therein, wherein the space for premixing the air and gas supplied from the air supply tube (100) and the gas supply tube (200) is divided into multiple stages of a venturi structure in the premixing chamber (300), and the discharging direction of the gas discharged inside the premixing chamber (300) through the gas supply tube (200) is formed in parallel to the flow direction of the gas supplied inside the premixing chamber (300) through the air supply tube (100).

Abstract: An intake manifold assembly has one or more shells coupled together and coupled to a cover. When the manifold cover, or other exterior surface, is rounded, the manifold does not sit stably on a flat surface when the rounded surface is placed onto the flat surface. The manifold may roll off a table and be damaged. To mitigate such situation, the rounded surface is provided with at least two standoffs extending outwardly from a surface of the cover with distal ends of the standoffs substantially lying in a common plane. The standoffs have a central axis and the standoffs extend outwardly from the surface along the central axis at least as far as any other feature of the intake manifold assembly.

Abstract: An intake manifold is provided that controls swirl on entry to a combustion chamber. Each intake manifold includes a fin or rib portion positioned to reduce or eliminate swirl induced by the configuration of the intake manifold, particularly when used in a large engine having a left bank and a right bank of combustion chambers. By controlling swirl induced by the intake manifold, swirl consistency is improved between engine cylinders and between the left bank and the right bank, improving the consistency of power output and reducing emissions, particularly particulate emissions, also called smoke.

Abstract: An exhaust gas feed device for an internal combustion engine includes an exhaust gas recirculation duct comprising an end, an outlet, and an outflow cross-section. An air intake duct opens into the exhaust gas recirculation duct. A flow-guiding element is arranged in and at the end of the exhaust gas recirculation duct. An exhaust gas recirculation valve comprises a regulator body. The regulator body is configured to control the outflow cross-section. A valve seat is arranged at the outlet at the end of the exhaust gas recirculation duct in which the flow-guiding element is arranged. The valve seat is configured to limit the outflow cross-section of the exhaust gas recirculation duct.

Abstract: In a fuel injection spray pattern for an opposed piston engine, the individual spray plumes have both radial and tangential components with respect to an injection axis (102, 114, 121), which adds a swirl component to a spray pattern of fuel directly injected into the combustion chamber of the opposed piston engine.

Abstract: A pressure reducing device is disclosed for use with a gaseous fuel system. The pressure reducing device may include a body defining an inlet and an outlet, and a converging-diverging nozzle formed between the inlet and the outlet. The pressure reducing device may further include a shockwave inducing element disposed within the body between the venture and the outlet, and an airfoil located inside the body upstream of the shockwave inducing element and connected to move the shockwave inducing element.

Abstract: A sealing device that is capable of suppressing the generation of unusual noise by guiding a gas flow and suppressing the generation of unusual noise caused by resonance between the gas flow and a pipe. An intake noise reduction portion (20) includes a flow-guiding net portion (21) for guiding a gas flowing in an intake pipe, an annular frame body portion (22) for supporting the flow-guiding net portion (21), a cylindrical portion (23) that extends from the frame body portion (22) in a direction in which the pipe extends, and is fitted into an inner circumferential surface of a second pipe (220) and a flange portion (24) that extends from an end portion of the cylindrical portion (23) toward an outer circumferential surface side, and is disposed in a space between an end surface of a first pipe (210) and an end surface of the second pipe (220). A gasket portion (10) is provided on both surfaces of the flange portion (24).

Abstract: A handheld work apparatus has at least one tool which is driven by a combustion engine. A portion of an intake channel of the combustion engine is formed by an elastic connecting piece which has a first section and a second section between which an expansion fold is arranged. The expansion fold has a first side wall and a second side wall arranged downstream of the first side wall. A peripheral wall, which extends in the region of the largest outside diameter (a) of the expansion fold, is arranged in flow direction between the first side wall and the second side wall. The connecting piece has a stop for the expansion fold which prevents a segment of the first side wall adjoining the peripheral wall from bearing against the second side wall.

Abstract: An aftertreatment system may include an exhaust pipe and a mixing pipe. The exhaust pipe may receive exhaust gas from an engine and may include a first portion defining a first longitudinal axis and a second portion defining a second longitudinal axis that is angled relative to the first axis. The mixing pipe may be disposed in the exhaust pipe and may include a tubular portion and a collar extending radially outward from the tubular portion. The tubular portion may include a plurality of openings and a plurality of deflectors. The plurality of openings may extend through inner and outer diametrical surfaces of the tubular portion. Each of the plurality of deflectors may be disposed adjacent a corresponding one of the plurality of openings.

Abstract: A fuel intake system for supplying an internal combustion engine with a fuel vapor/air mixture without the use of a carburetor or fuel injectors. The fuel intake system includes a tank holding fuel and an evaporated fuel vapor. An air inlet tube and a vapor outlet tube are coupled to the tank. A vapor conditioner is coupled between the vapor outlet tube and the engine. The vapor conditioner has a vapor conditioner throttle body with a butterfly valve. The vapor conditioner regulates the fuel vapor/air mixture by selective positioning of the butterfly valve.

Abstract: A fan air modulating valve (FAMV) employs a pair of doors rotatably attached at the fan bypass air exit of a precooler. An actuator engages the doors for simultaneous rotation through a range of motion from a first closed position to a second open position, wherein trailing edges of said doors sealingly engage an exit plenum extending from the precooler in the first closed position and fan bypass air flow is modulated by positioning the doors within the range of motion between the first and second positions.

Abstract: A fuel air mixer includes a fuel air mixing tube having an inlet, an outlet, and an inlet inner diameter. A collar is attached at the mixing tube inlet and includes a first cylindrical portion upstream of the mixing tube inlet, and a body portion encircling the mixing tube at the mixing tube inlet and forming a fuel reservoir around the mixing tube inlet. The first cylindrical portion is spaced from the mixing tube inlet to create a gap placing the fuel reservoir in fluid communication with the mixing tube inlet. The first cylindrical portion has an inner diameter that is smaller than the inlet inner diameter so air flowing through the first cylindrical portion and into the mixing tube inlet draws gaseous fuel from the fuel reservoir into the mixing tube through the gap.

Abstract: An intake system for an internal combustion engine, having a structure in which blow-by oil and/or fuel entering into an air cleaner case can be discharged to the outside of the air cleaner case. The intake system for an internal combustion engine is provided in which air is sucked from a clean air chamber in the air cleaner case into a throttle body provided with a throttle valve through a funnel while defining an airflow passage. Concurrently, fuel is sprayed from an injector, thereby feeding the fuel-air mixture into an intake port. A bypass passage different from the airflow passage is provided between the clean air chamber in the air cleaner case and the throttle body. The bypass passage is so structured that a passage inlet thereof on the clean air chamber side opens at an inner wall surface of the air cleaner case.

Abstract: An intake apparatus of an engine provided with a fuel supply device for supplying fuel into an intake passage. A guide body is disposed in the intake passage located downstream from the fuel supply device, and the guide body may have at least one hole. The volume ratio of the guide body relative to the intake passage range and the volume ratio of the total holes relative to the guide body are ranged in the preferable volume percent.

Abstract: A tunable throttle plate for customizing fuel delivery to a supercharged engine includes a plate that may be coupled to intake manifold of an engine. A fuel aperture extends through the plate. A spray rod is coupled to the fuel aperture. A fuel nozzle is coupled to the spray rod. The fuel nozzle delivers a fuel to the plate through the spray rod. A solenoid is coupled to the fuel nozzle. The solenoid is coupled to a fuel source so the solenoid delivers the fuel to the fuel nozzle.

Abstract: An intake apparatus of an engine provided with a fuel supplying device for supplying fuel into an intake passage, includes: a guide body having multiple holes disposed in the intake passage located downstream from the fuel supplying device. The guide body has a stepped portion extending in a direction intersecting with a direction of a flow of intake air.

Abstract: A finned engine spacer is coupled in thermal communication between an intake manifold and a fluid metering device. The spacer includes a body having an upstream face, an opposed downstream face, and sides extending between the upstream and downstream faces, the sides cooperating to form an outer periphery. A bore is formed through the body from the upstream face through to the downstream face, the bore for communicating a fuel charge from the fluid metering device to the intake manifold. Fins are formed in each of the sides, and the fins extend between the bore and the outer periphery, creating a finned engine spacer.

Abstract: A lubricant delivery system for an oil consumption-type engine utilizes an atomizer to atomize lubricant obtained from a lubricant reservoir of the engine. The lubricant from the reservoir may be used to lubricate auxiliary components prior to being atomized and consumed in the combustion chamber of the engine. The atomizer can be a turbocharging device.

Abstract: A mixing valve of an exhaust-gas recirculation device of an internal combustion engine of a motor vehicle includes an intake flap and an exhaust-gas flap coupled rigidly to one another via a coupling rod. During driving of the exhaust-gas flap, the intake flap is first pivoted in the opposite direction via the coupling rod. The exhaust-gas flap and intake flap are pivoted in the same direction only above a provided pivoting angle.

Abstract: A control system for a vehicle includes an error detection module and a remedial control module. The error detection module detects whether an accelerator of the vehicle is stuck is based on vehicle speed, a position of the accelerator, and one of a pressure applied to a brake of the vehicle and a status of a parking brake of the vehicle. The remedial control module, when the accelerator is stuck, at least one of resets the position of the accelerator and decreases torque output of a powertrain system.

Abstract: An adjustable restrictor device for controlling flow of induction air into an engine. The restrictor device may comprise a generally flat compact housing which is installed between a carburetor and intake manifold of an engine. The housing may have throughbores to allow air flow, which coincide in location to carburetor bores. The restrictor device may have two individual restrictors enclosed therein, each movable to positions which progressively obstruct and open the throughbores to control flow of inducted air. Each restrictor may be manually controlled in common by a rotatable control shaft. Threading of the knobs may be opposite handed, thereby enabling the restrictors to move similarly in effect as to controlling air flow but in opposite directions.

Abstract: An air exhaust mixer assembly includes an upstream intake section with an upstream elbow and a downstream elbow. A mixing tube is configured to introduce exhaust gas into the upstream intake section at a location upstream of the downstream elbow. An internal combustion engine utilizing the air exhaust mixer assembly is also provided.

Abstract: A recirculation device includes an air intake duct (3) which is followed by a manifold (6), means for introducing recycled exhaust gases, for mixing same with the fresh air let in. This device is designed to inject the exhaust gases by forming two counter-rotating adjacent vortices (14, 15), owing to a twin tubular mixer nozzle (10, 11) in communication with a common exhaust gas supply duct, positioned tangentially with respect to the two nozzles, placed side by side. The two vortices (14, 15) are self-sustaining to the outlets (7) of the manifold (6). Such a recirculation device is applied, in particular, to an air intake duct (3) of oblong cross section and/or to a manifold (6) with a flattened inlet (5) and/or a flattened plenum (8), in particular for a motor vehicle engine.

Abstract: In one aspect a mixing tube is provided for the introduction of a flow of exhaust gas into a flow of intake air of an internal combustion engine. The mixing tube comprises an opening, tube section, and a plurality of tube ports. The opening is configured to receive the flow of exhaust gas. The tube section is fluidly connected to the opening and extends into the flow of intake air. The tube ports on the tube section are located in low static pressure regions that are determined as intake air passes around the tube section.

Abstract: A gas fuel supply apparatus is constructed to be capable of supplying any one of propane gas and butane gas to a gas engine while switching between the propane gas and the butane gas. A check valve is provided in a gas fuel supply passages corresponding to a gas canister containing the gas fuel of a low working pressure (propane gas). The check valve prevents the gas fuel of a higher working pressure (butane gas) from flowing from a downstream side of the check valve to an upstream side of the check valve.

Abstract: This invention relates to an automatically regulated gaseous mixer for small universal gas engine comprising a mixer body, a choker, an air inlet port, a main gas passage, a main metering jet, a mixture outlet port, a throttle valve, a gas connecting passage and an auxiliary gas passage, which is characterized in that an auxiliary gas passage is set parallel to the main gas passage and connected through a vertical gas passage. Its top end is linked to the main gas passage and the lower end is connected with the auxiliary gas passage, one end of the auxiliary passage is connected with the mixture outlet port. The shaft of throttle valve is in line with auxiliary gas passage and is extended into the auxiliary gas passage to form an automatically regulated valve. The advantages of this invention are simple and compact; practical and reliable.

Abstract: A fuel air mixer includes a fuel air mixing tube having an inlet, an outlet, and an inlet inner diameter. A collar is attached at the mixing tube inlet and includes a first cylindrical portion upstream of the mixing tube inlet, and a body portion encircling the mixing tube at the mixing tube inlet and forming a fuel reservoir around the mixing tube inlet. The first cylindrical portion is spaced from the mixing tube inlet to create a gap placing the fuel reservoir in fluid communication with the mixing tube inlet. The first cylindrical portion has an inner diameter that is smaller than the inlet inner diameter so air flowing through the first cylindrical portion and into the mixing tube inlet draws gaseous fuel from the fuel reservoir into the mixing tube through the gap.

Abstract: A gaseous fuel internal combustion engine includes an engine housing defining at least one cylinder, and an intake housing defining an intake passage fluidly connecting with the at least one cylinder. The engine includes a gaseous fuel delivery mechanism coupled with the engine housing and a distributed ignition promoting mechanism having a bead presentation device extending into the intake passage and configured to present a liquid bead of distributed ignition promoting material therein such as engine lubricating oil. During operation, gases passing through the intake passage dislodge the liquid bead from the bead presentation device and carry the distributed ignition promoting material into the cylinder for distributively igniting therein a mixture containing a gaseous fuel, air and the distributed ignition promoting material.

Abstract: A gaseous fuel mixer for an internal combustion engine includes a mixer body and a mixer element supported in a mixer passage formed in the mixer body. The gaseous fuel mixer attaches to an intake manifold at a first end and receives intake air at a second end. A distal end of the mixer element accepts gaseous fuel from a manifold passage extending from a port positioned in the intake manifold. The gaseous fuel flows through the mixer element and then through a plurality of openings formed in an exposed proximate end of the mixer element. The gaseous fuel mixes with the intake air, and the mixture of intake air and gaseous fuel flows from the second end of the mixer body to the first end of the mixer body and then to the intake manifold.

Abstract: A method includes determining a plurality of characteristic profiles associated with a mobile asset moving from a first operating point to a second operating point along a predefined path. The method further includes determining a fuel combustion ratio of the plurality of the fuels associated with at least one engine cylinder of the mobile asset based on the plurality of characteristic profiles so as to maintain a plurality of actual values associated with usage of the plurality of fuels to less than or equal to predefined corresponding threshold values. The method also includes controlling a fuel delivery system of the mobile asset so as to deliver the plurality of fuels to the at least one engine cylinder based on the fuel combustion ratio.

Abstract: The present invention relates to a system and method for providing fuel to internal combustion engines including fuel activation prior to injection. The method carried out by the system comprises dissolving a mixture of gasses providing improved fuel dispersing after fuel injection into a combustion chamber. Dissolved gasses desorption is stimulated from a unsaturated fuel solution. Full control of fuel flows with dissolved gas/gasses to and from injectors and FET technology based on Henry's law (dissolving gasses in the liquids) and Kelvin principle (vapor pressure over droplet surface). The system consists of compact components, including exhaust gasses recirculation system which can be easily added to existing diesel and gasoline engine fuel supply systems. The method and system were tested with four different types of engines and provides fuel economy in 12-20% decrease of emissions and up to 25% at variable engine loads and significantly at engine cold start.

Abstract: An intake manifold capable of being connected with a throttle valve apparatus includes a conducting pipe defining an air intake pathway therein, a surge tank for receiving air flowing from the throttle valve apparatus through the air intake pathway, and a noise prevention net placed within a half of a cross section of the air intake pathway. The noise prevention net has a net portion for reducing noise volume and defines at least one opening outside of the net portion in a radial direction in the cross section of the air intake pathway such that the opening is positioned along or near an inner wall of the conducting pipe.

Abstract: A car engine air-intake unit has a round main body. The main body has airflow guides and airflow guiding plates to guide air flowing into the intake tube to rotate, and blades are provided which protrude out of the main body and extend from the airflow guiding plates to increase the rotating angle and stroke of the guided air flow. The intake unit can be used in cooperation with any of various specific air-intake tubes, and can be assembled and adjusted to support different air intake amounts and any of various air-intake tubes of different bores, and thus offers convenience of use.

Abstract: Many IC engine inefficiencies are linked to the relatively low mixture formation rates of current injection methods. Process intensification (PI) is excellent at high mixture formation rates, high mass transfer rates, and short residence times, therefore a wall integrated injection method and device featuring PI has been provided. It allows increased number of injection sites and interfacial surface area between fluid jets and the volume of the squash area, hence high mixture formation rates shorter Liquid Lengths and the use of micro nozzles to further intensify the mixing process by locally mixing fuel and oxidant. This allows high EGR and low compression ratios and better control of HCCI start of ignition. PI effectively achieves thermo and species stratification for extending the load range of the HCCI engine while permitting effective water addition for reciprocating and turbine for lower exhaust heat and less fuel burned hence less CO2 emissions.

Abstract: An ultrasonic fuel/power enhancer for producing sound and ultrasound at different wind speeds and conditions is provided. The enhancer is mountable in an air intake of a vehicle with the vehicle having a predetermined number of cylinders and each cylinder having a combustion chamber. The enhancer comprises at least one band and at least one tubular whistle. A whistle connection mechanism is wrapped around the whistle with the whistle connection mechanism having at least one band receiving aperture and the band insertable through one of the band receiving apertures. At least one stabilizing tab is mounted to the whistle connection mechanism wherein the whistle is shaped and designed to produce sonic and ultrasonic sounds thereby atomizing gas droplets being supplied to the combustion chamber of each cylinder.

Abstract: An injection gate (44,144,244,344) for high pressure, high velocity secondary fluid for admixture of an atomized spray (80,180) thereof with another or primary fluid that atomizes the other fluid. The secondary fluid may be an accelerant and the primary fluid may be a low pressure fuel/air mixture in a fuel injection arrangement for an internal combustion engine. An injection billet (10,110,210,310) for an engine is interposed between the carburetor (12) and the manifold (14), with an array of such injection gates (44,244,344) paired with an array of fuel/air gates (34,234,334) about an aperture coinciding with a throttle bore (60,160,260,360) and evenly balancing the spray about the throttle bore, creating a halo effect of atomized admixture of accelerant/fuel. The injection of accelerant is directed sharply downwardly toward the center of the bore and through the injected fuel stream, atomizing the fuel thereof for a high efficiency boost of horsepower.

Abstract: A marine vessel propulsion device includes an engine, an intake pathway which has a gas flow hole in the inner surface thereof and is arranged to supply air to the engine, and an air restrictor disposed on the upstream side with respect to the gas flow hole of the intake pathway. The air restrictor has a vent hole, and is arranged to restrict the amount of air to flow into the engine via the intake pathway. The vent hole of the air restrictor is arranged at a position which is near the inner surface of the intake pathway and corresponds to the gas flow hole.

Abstract: A pre-injection fuel atomization system for a combustion engine that reduces droplet size of incoming fuel at air intake, creating an aerosol that is injected by fuel injectors into the combustion chambers. The system uses a vibrating crystal in a transducer, the vibrations atomizing the fuel into an aerosol. The droplet size is reduced to around 0.1 microns, providing more surface area available for fast surface combustion. The fuel droplets are maintained in a stoichiometric ratio to oxygen in the air so that burning is complete and clean.

Abstract: One embodiment of a device and method for controlling or restricting the air-fuel mixture into an internal combustion engine having a body member rigidly mounted between the air-fuel metering device and the engine intake, a slidably insertable restrictor plate, and a retaining and sealing cover. The body member may contain a single spacer or two spacers and may contain either a slot or a groove that communicates with the plate. The plate may contain a plurality of bore holes and multiple distinct plates can be made in order to achieve various and linear amounts of restriction. The plate can be easily and quickly changed depending on the amount of restriction desired. One or more embodiments of the device can be used on engines in various motorized vehicles and in various motorsports, such as drag racing. Other embodiments are described and shown.

Abstract: An injection plate assembly for an internal combustion engine that includes a manifold and carburetor or throttle body is provided for injection of a primary fuel and an accelerant into throttle bore(s) of the manifold. The injection plate assembly is adapted to be installed between the manifold and the carburetor. In order to equalize injection of both the primary fuel and the accelerant, the lower plate includes at least two fuel inlet ports that provide fuel at opposing sides of the lower plate. The upper plate includes at least two accelerant or additive inlet ports that provide accelerant to opposite sides of the upper plate, with the accelerant inlet ports being located on different sides of the injection plate assembly from the fuel inlet ports on the lower plate. To further improve flow of the accelerant to the injection gates in the upper plate, the runners in the upper plate define paths that have internal corners having a radius of 0.10 inches or greater.