Abstract: The instant invention provides an apparatus and system for cooling the air charge of an internal combustion engine. More specifically, the instant invention provides an air-induction system suitable to provide cooled air charges to turbocharged, supercharged or naturally aspirated internal combustion engines to increase power output while reducing engine emissions. The system utilizes gaseous fuel stored as a liquid wherein the liquefied gaseous fuel is vaporized and warmed at least partially with heat removed from the intake air charge supplied to the engine from the turbocharger or supercharger. In a preferred embodiment, the compressed intake combustion air is first cooled in an aftercooler against an ambiently cooled coolant and is subsequently cooled further by the chiller of the instant invention which utilizes the change in phase, between liquid and gas, of the alternative fuel to cool the incoming air charge.

Abstract: According to the present invention of the simple structure in which the back pressure chamber of the inner vent type regulator is divided by the inner vent diaphragm and the displacement limitation rod protrudes from the center portion thereof to the center portion of the pressure regulation diaphragm, it is possible to suppress the variation in air-fuel ratio to a minimum both when the air cleaner is blocked and at the time of high load operation, without being accompanied by a rise in costs.

Abstract: An integrated gaseous fuel delivery system is provided. The system includes a storage tank to hold a gaseous fuel and a pressure regulation system disposed interior the storage tank and configured to regulate a pressure of gaseous fuel delivered from the storage tank.

Abstract: A gas mixer of universal small combustion-gas engine for automatically controlling amount of combustion gas is provided, which includes a casing, a choker, an air inlet, a combustion-gas passage, a main jet, a mixture outlet, a throttle valve, a passage, an additional combustion-gas passage and an gas automatically adjusting valve, the air inlet is provided on the upper end of a chamber of the casing, the chocker is provided under the air inlet, the combustion gas passage is provided on the side of the chamber of the casing, the main jet is provided on the front end of the combustion-gas passage and is connected with the chamber of the casing, the mixture outlet is provided on the lower end of the chamber of casing and the throttle valve is provided above the mixture outlet and under the combustion-gas passage, the additional combustion-gas passage is provided on rear end of the throttle valve, the passage is provided between the combustion-gas passage and the additional combustion-gas passage, the upper end

Abstract: A path (24) is formed in an intake tube (6), which supplies external air to a reciprocating engine (4). External air flowing from an inlet port to an outlet port of the path (24). A gaseous fuel path (26) is connected to the path (24) at an intermediate location thereof. A gaseous fuel, lighter than air, is supplied through the gaseous fuel path (26) into the path (24). A plurality of nets (8) are disposed in an area of the path (24) between the outlet port and the gaseous fuel path (26). The nets (28) are spaced along the length of the path (24) with the outer peripheral surface of each net (28) being in contact with the inner surface of the path (24).

Abstract: A method of operating an internal combustion engine for the purposes of producing significantly lower NOx emissions than currently achieved without exhaust aftertreatment is described. The engine is equipped with an intake system and combustion chamber that minimizes overall in-cylinder angular momentum of the air fuel charge. The engine is fueled with a gaseous fuel such as natural gas. The purpose of the intake system and combustion chamber is to create low combustion peak temperature while keeping the overall average temperature the same. Charge dilution which can be in the form of excess combustion air, recirculated exhaust gases, water injection, or combinations of all three will be used to assist in reducing NOx emissions.

Abstract: In a method for controlling the composition of a combustible air-fuel mixture present in a combustion chamber of a spark-ignited internal combustion engine having external mixture formation, at least two fluids containing air are generated, of which at least one is an air-fuel mixture; the fluids are supplied to the combustion chamber, wherein the quantity proportions of the fluids are controlled such that their total composition corresponds to the predetermined composition.

Abstract: The present invention provides methods and apparatus for premixing fuel and oxidant for combustion. The methods and apparatus may include a two stage vortex, each stage accommodating different flow rate ranges. The vortex pulverizes fuel and optimally mixes the fuel with an oxidant prior to introduction into a combustion chamber. The premixing results in more complete combustion and, consequently, fuel efficiency may be increased and pollution may be decreased. The present invention also enables introduction of fuel and oxidant to an engine without creating any shockwaves in engine cylinders, which may otherwise occur with current fuel injection systems.

Abstract: A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system is operated to supply fuel to an MEGI engine.

Abstract: The invention relates to an operating method and to a device for a gas-driven internal combustion engine. According to the invention, the pressure in a gas injection system is adapted to the operational state of the internal combustion engine. A higher pressure is adjusted in the gas injection system during a higher charge of the internal combustion engine. Said higher pressure enables a higher volume flow through the gas injection valves associated with the gas injection system. The power produced by the internal combustion engine can be optimized. A lower pressure in the gas injection system is adjusted in the event of a lower charge or if the internal combustion engine is switched off. The lower pressure emits lower pollutant emissions which are produced by the internal combustion engine. The invention is characterized by a bi-directional interface between a control device and a pressure reducer or pressure controller.

Abstract: A system and method for metering the injection of propane gas into the air intake of a gasoline or gaseous fuel spark ignition internal combustion engine by subjecting a metering valve member to intake manifold vacuum so as to decrease propane injection with increasing engine vacuum which counters a substantially constant biasing spring force acting to thereon tending to increase at the propane injected into the engine air intake.

Abstract: A fuel supply system for a gas engine is provided that includes a liquefied gas fuel supply source (16), a pressure regulator (10) for regulating the pressure after liquefied fuel fed from the liquefied gas fuel supply source (16) is converted into vaporized fuel, and a mixer for mixing the pressure-regulated vaporized fuel with air and supplying it to a gas engine (E), a shutoff valve (21) being provided in a liquefied fuel passage (15) between the liquefied gas fuel supply source (16) and the pressure regulator (13), wherein the shutoff valve (21) is formed so as to be opened by manual cranking of the gas engine (E). This enables the shutoff valve of the liquefied fuel passage to be opened from when the gas engine is started, even for a gas engine that is not equipped with a battery or even when a battery of a gas engine is not sufficiently charged.

Abstract: A device for ejecting an at least diphasic mixture includes an injection inlet for a liquid and a gas, a distribution chamber for producing a first liquid-gas mixture, an ejection nozzle of the first liquid-gas mixture in a main direction defined by an axis-vector. The ejection nozzle has a geometry comprising, on its length at least, a minimal section or neck at a location of the axis-vector. Among others things, due to the nozzle geometry, the expansion obtained inside the ejection nozzle allows the first liquid-gas mixture from the distribution chamber to be converted into a second mixture, according to the flow configuration, consisting for instance of a diphasic mist jet having an ejection range and liquid particle size that can be controlled according to the liquid and gas mass flow and to the absolute pressure at the injection inlet.

Abstract: Ammonia is used as precursor source of hydrogen fuel in an on-vehicle internal combustion engine. Ammonia is stored as, for example, a ligand in an on-vehicle transition metal composition. Upon demand for hydrogen by the vehicle's engine control system, ammonia is expelled as a gas from some of the composition and the ammonia gas is dissociated into a mixture of hydrogen and nitrogen and delivered as a fuel-containing mixture to the engine. In a preferred embodiment, the hydrogen is used as a supplement to gasoline as a fuel for engine operation.

Abstract: The present invention provides a system for providing hydrogen gas to inject into the intake of an internal combustion engine. A hydrogen storage reservoir in communication with the gas output port stores a supply of hydrogen, and a hydrogen storage release valve retains the hydrogen in the storage reservoir and selectively releases hydrogen from the storage reservoir when the engine is started. In the preferred embodiment the system comprises an electrolysis cell that produces hydrogen when the engine is warm, and hydrogen is released from the storage reservoir when the system is active but the electrolysis cell is not producing hydrogen.

Abstract: A gas powered internal combustion engine in which the gas is provided from pressurized liquid gas in an LPG container and in which the LPG container is rigidly mounted adjacent to the internal combustion engine at a preselected angle to be in conductive heat transfer relationship to the internal combustion engine and in vibration receiving relationship to the internal combustion engine whereby the liquified gas in the LPG container is heated and the effective surface area thereof is increased.

Abstract: An operating gas circulation type internal combustion engine that uses argon as the operating gas, for example, and includes a hydrogen and oxygen supply portion, an argon supply amount regulating portion, and an electric control unit. The electric control unit determines the amount of hydrogen and oxygen to be supplied to a combustion chamber based on a required torque, which is the torque required of the internal combustion engine, and supplies the determined amounts of hydrogen and oxygen to the combustion chamber using the hydrogen supply portion and the oxygen supply portion. Further, the electric control unit determines an amount of operating gas to be supplied to the combustion chamber according to the required torque, and controls the argon supply amount regulating portion such that the determined amount of operating gas is supplied to the combustion chamber.

Abstract: A trim system for controlling an equivalence ratio in a fuel system is provided. The fuel system includes an air duct, a mixer disposed in the air duct, and a converter. The mixer has a reference pressure port and an air valve vacuum port. The converter has an outlet port and a bias port. The trim system comprises the mixer, the converter, a balance line, one or more orifices, and first and second trim valves. The outlet port is operably coupled to the mixer to deliver vaporized fuel to the mixer. The balance line is operably coupled to the reference pressure port, the bias port, and the air valve vacuum port. The balance line provides pressure to the bias port. The first and second trim valves are disposed in the balance line and operable such that the equivalence ratio in the fuel system is controlled.

Abstract: A fuel selection device is provided for allowing a user to connect the cylinders of an internal combustion engine to a user-selected fuel source. The fuel selection device includes a housing that defines a cavity for receiving a moveable selector therein. The selector defining first, second, third and fourth flow paths. The first and second flow paths are used for flowing a first type (e.g., natural gas) of fuel from a fuel source to the cylinders of the engine. The second and fourth flow paths are used for flowing a second type of fuel (e.g., liquid propane vapor) from a fuel source to the cylinder. The selector is movable between a first position wherein first and second cylinders communicate with the first and second flow paths, respectively, and a second position wherein the first and second cylinders communicate with the second flow path and fourth flow paths, respectively.

Abstract: In a method for controlling the composition of a combustible air-fuel mixture present in a combustion chamber of a spark-ignited internal combustion engine having external mixture formation, at least two fluids containing air are generated, of which at least one is an air-fuel mixture; the fluids are supplied to the combustion chamber, wherein the quantity proportions of the fluids are controlled such that their total composition corresponds to the predetermined composition.

Abstract: A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system includes a boil-off gas reliquefaction apparatus for reliquefying boil-off gas generated in the LNG tank.

Abstract: A fuel gas supply system of a vessel, such as an LNG carrier, is provided for supplying fuel gas to a high-pressure gas injection engine of an LNG carrier, wherein LNG is extracted from an LNG storage tank of the LNG carrier, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine. In one embodiment, the system is operated to supply fuel to an MEGI engine.

Abstract: A fuel injector (10) for an internal combustion engine (88) includes a centerbody (12) and a casing (14) disposed radially outward of the centerbody to define an annular mixing section (16) between the centerbody and the casing. The fuel injector also includes an air inlet (e.g., 18) of the mixing section for injecting a first portion (22) of combustion air into the mixing section. A fuel inlet (32) is disposed in the centerbody for injecting fuel (34) into the mixing section. A fuel conduit (48) disposed in the centerbody conducts the fuel to the fuel inlet and a valve (50) disposed in the fuel conduit selectively controls fuel injection into the mixing section. The valve may be positioned sufficiently close to the fuel inlet to provide the desired accurate timed injection. The injector also includes an outlet (19) of the mixing section for discharging a fuel/air mixture (60).

Abstract: A gas powered internal combustion engine in which the gas is provided from pressurized liquid gas in an LPG container and in which the LPG container is rigidly mounted adjacent to the internal combustion engine at a preselected angle to be in conductive heat transfer relationship to the internal combustion engine and in vibration receiving relationship to the internal combustion engine whereby the liquified gas in the LPG container is heated and the effective surface area thereof is increased.

Abstract: A fuel is conditioned in a fuel supply system for more efficient combustion in a combustion chamber. The conditioning system includes a fuel vessel for fuel conditioning, at least one fuel dispersing nozzle mounted for discharge into the fuel vessel, at least one gas inlet port and at least one conditioned fuel outlet. A low level sensor registers a lower level of conditioned fuel in the fuel vessel. A high level sensor registers an upper level of conditioned fuel in the fuel vessel. A gas source feeds a gas to the fuel vessel, wherein the gas is dissolved in the liquid fuel for forming a liquid/gas fuel solution. A low-pressure fuel pump and a liquid fuel supply line supply liquid fuel from a fuel reservoir to the at least one dispersing nozzle of the fuel vessel at a pressure P1 higher than the gas pressure P2. A needle valve positioned downstream the fuel chamber, lowers the pressure, created in the fuel chamber by gas pressure P2, to lower level P3 downstream the needle valve.

Abstract: A fuel delivery system for supplying liquid gas fuel to an engine is disclosed. The fuel can be supplied solely to the engine or together with diesel fuel. The fuel delivery system includes an injector (20) for receiving the liquid gas, and for ejecting the liquid gas in vapour form to the engine E. A bubble preventing mechanism (40, 44, 48; 8, 203, 209, 208) is supplied for preventing the liquid gas from bubbling or boiling in the injector which would impair the ejection of fuel from the injector. The preventing means comprises cooling means which may use a coolant to cool the injector. In one embodiment, the coolant is in the form of bubbled vapour which is directed away from the injector (20) and enters a chamber (206) in which the injector (20) is located, so that the vapour cools the injector (20). The vapour (20) can pass to a vapour block (208) for supply to the intake air of the engine so the vapour is supplied back to the engine together with fuel ejected by the injector (20).

Abstract: A method for a hydrogen fueled internal combustion engine to reduce backfiring, pre-ignition, and/or backflash, the engine also including a combustion chamber, an intake manifold, an exhaust manifold, at least one intake valve, at least one exhaust valve, a hydrogen injector, a compression device, and a variable valve timing system coupled to the intake valves. The method comprises compressing air using the compression device; injecting hydrogen and mixing at least said hydrogen with air discharged from the compression device; and opening the intake valve to induct at least air into the combustion chamber, wherein the intake valve opening time varies with an operating condition.

Abstract: An intake passage (10) communicating with a combustion chamber (3) comprises a first branch intake passage (16) having an intake port (4) at one end thereof and also having an intake manifold including a surge tank (13), a second branch intake passage (17) having an intake port (14) at one end thereof and also having an intake manifold including a surge tank (23), and a common intake passage (19) communicating with the ends of the first branch intake passage (16) and the second branch intake passage (17). The common intake passage (19) is provided with a mixer (11) for producing a mixture. The intake passage (10) is provided with a switching valve (18) for bringing the common intake passage (19) into communication with at least one of the first branch intake passage (16) and the second branch intake passage (17).

Abstract: The invention deals with a method for the operation of an internal combustion engine with at least two cylinders, which can be operated with a fuel of variable quality stored in a tank and/or with fuel blends stored in the tank from a first and at least a second fuel in variable mixing ratios, and wherein variable fuel qualities and/or fuel blends of different compositions require variable air/fuel ratios for the achievement of a stable combustion and/or have a variable vaporization behavior.

Abstract: A gas powered internal combustion engine in which the gas is provided from pressurized liquid gas in an LPG container and in which the LPG container is rigidly mounted adjacent to the internal combustion engine at a preselected angle to be in conductive heat transfer relationship to the internal combustion engine and in vibration receiving relationship to the internal combustion engine whereby the liquified gas in the LPG container is heated and the effective surface area thereof is increased.

Abstract: A gas powered internal combustion engine in which the gas is provided from pressurized liquid gas in an LPG container and in which the LPG container is rigidly mounted adjacent to the internal combustion engine at a preselected angle to be in conductive heat transfer relationship to the internal combustion engine and in vibration receiving relationship to the internal combustion engine whereby the liquified gas in the LPG container is heated and the effective surface area thereof is increased.

Abstract: A gas fuel supply system comprises an injector provided in an intake pipe of an internal combustion engine, a fuel supply passage for supplying the gas fuel to the injector, and source pressure control means for controlling pressure of the gas fuel supplied to the injector through the fuel supply passage by using pressure in an intake pipe such that the differential pressure between the pressure of the gas fuel supplied to the injector and the pressure in the intake pipe increases as the pressure in the intake pipe increases.

Abstract: A method of operating an engine is provided. The method may include supplying a combustible combination of reactants to a combustion chamber of the engine, which may include supplying a first hydrocarbon fuel, hydrogen fuel, and a second hydrocarbon fuel to the combustion chamber. Supplying the second hydrocarbon fuel to the combustion chamber may include at least one of supplying at least a portion of the second hydrocarbon fuel from an outlet port that discharges into an intake system of the engine and supplying at least a portion of the second hydrocarbon fuel from an outlet port that discharges into the combustion chamber. Additionally, the method may include combusting the combustible combination of reactants in the combustion chamber.

Abstract: An engine operating method and a direct injection gaseous fuelled system directly injects a gaseous fuel into a combustion chamber during a compression stroke, commands gaseous fuel injection pressure to a target value that is determined as a function of at least one pre-selected engine parameter, measures actual gaseous fuel injection pressure and adjusts fuel injection pulsewidth to correct for differences between the target value and the actual gaseous fuel injection pressure to thereby inject the desired mass quantity of gaseous fuel as determined from an engine map.

Abstract: The apparatus includes a handle (1) with a gas cartridge housing and the gas induction device (4) designed to be mounted on the cartridge and connected to the engine. The engine and the induction device (4) are connected by a flexible tube mounted on the induction device side on an end fitting (6) designed to be engaged in a base (7) of the induction device and to cooperate with means (15, 17) of the handle (1) of the apparatus designed to push the connector (6) against the induction device (4).

Abstract: A method and system for reducing nitrous oxide emissions from an internal combustion engine. An input gas stream of natural gas includes a nitrogen gas enrichment which reduces nitrous oxide emissions. In addition ignition timing for gas combustion is advanced to improve FCE while maintaining lower nitrous oxide emissions.

Abstract: This invention relates to the injection of compressible gaseous fuel directly into the combustion chamber of a reciprocating piston-type internal combustion engine. In particular, the invention provides apparatus and methods for low-pressure, high-speed direct injection of compressed natural gas into a combustion chamber of an engine. Using the present invention, relatively low intake pressures of about 50 to about 150 PSIG yield high-speed (sonic and supersonic) gas flow through the diverging nozzle portion for injection into the combustion chamber. Preferably, the gas reaches supersonic velocity, approaching Mach 1.5 to 2.5.

Abstract: A power plant, including an internal combustion engine, a fuel conversion device that coverts a fuel to be supplied to the internal combustion engine from a before-conversion fuel to an after-conversion fuel, a first fuel supply device that supplies the fuel conversion device with the before-conversion fuel, a second fuel supply device that supplies the internal combustion engine with the after-conversion fuel, the after-conversion fuel being the fuel that has been converted by the fuel conversion device, and a controller that is communicated with the internal combustion engine, the fuel conversion device, the first fuel supply device and the second fuel supply device.

Abstract: A fuel is conditioned in a fuel supply system for more efficient combustion in a combustion chamber. The conditioning system includes a plurality of vessels, each defining a fuel chamber for fuel conditioning, at least one fuel dispersing nozzle mounted for discharge into the fuel chamber, at least one gas inlet port, a gas outlet port with a gate valve and a pressure reducer mounted thereon. A low level sensor registers a low level of conditioned fuel in the fuel chamber. A gas source feeds a gas to the vessels wherein the gas is dissolved in the liquid fuel for forming a liquid/gas fuel solution. A gas delivery and gas pressure control system with flow-directional valves and gas pressure regulators supply gas and maintain a relatively high, first gas pressure P1 and a relatively low, second gas pressure P2.

Abstract: A fuel mixing device includes a body having an intake bore, a first surface, and a second surface adjacent to the first surface. A first valve device may be carried by the body on the first surface and a second valve device may be carried by the body on the second surface. A first fuel passage may be provided in the body communicating with the first valve device and adapted to communicate with a supply of fuel. A second fuel passage communicates with the second valve device and the first fuel passage to permit fuel that has passed through the first valve device to flow to the second valve device, wherein the first fuel passage and the second fuel passage connect to at least one of the first surface or the second surface.

Abstract: An apparatus to deliver a fuel into a chamber is provided. In one embodiment, the apparatus includes a fuel inlet and a substantially circular fuel distribution canal communicating with the fuel inlet. A biasing element is coupled to the substantially circular fuel distribution canal, with the biasing element having a plurality of slots arranged to non-uniformly dispense the fuel into the chamber. Another embodiment includes a flange positioned in the substantially circular fuel canal, with the flange structured to perturb a fuel passing into the chamber. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.

Abstract: A path (24) is formed in an intake tube (6), which supplies external air to a reciprocating engine (4). External air flowing from an inlet port to an outlet port of the path (24). A gaseous fuel path (26) is connected to the path (24) at an intermediate location thereof. A gaseous fuel, lighter than air, is supplied through the gaseous fuel path (26) into the path (24). A plurality of nets (8) are disposed in an area of the path (24) between the outlet port and the gaseous fuel path (26). The nets (28) are spaced along the length of the path (24) with the outer peripheral surface of each net (28) being in contact with the inner surface of the path (24).

Abstract: A CNG fuel injector for a fuel system of an internal combustion engine. The fuel system includes a fuel rail and an engine manifold. The fuel injector includes a fuel inlet for fluid communication with the fuel rail, a fuel outlet having an orifice disposed along a longitudinal axis for fluid communication with the engine manifold, and a member proximate the fuel outlet downstream of the orifice for dispersing the CNG in a direction skewed from the longitudinal axis as the CNG flows from the orifice into the engine manifold.

Abstract: A fuel supply assembly providing vaporized fuel to an engine wherein a quantity of liquid gasoline fuel is controllably heated for a desired vapor emission from the liquid fuel, and a conduit arrangement conducts the vapor, intermixes it with ambient air and conveys the intermixture to the engine's combustion chamber. A sensor in the engine exhaust monitors the hydrocarbon content of the exhaust and control valving controls the vapor to air intermixture in response to the monitor for maintaining a desired intermixture that produces the desired hydrocarbon content.

Abstract: A fuel control device for a combustion engine capable of running on any one of a plurality of fuels has a fuel selection module with a plurality of fuel type settings for selecting a specific fuel type whereupon the fuel control device controls the outlet pressure of the chosen fuel to a desired fuel pressure corresponding to the calorific properties of the chosen fuel. The fuel selection module preferably operates a plurality of fuel flow circuits each designated for a specific fuel type, and each having a biased closed inlet valve and a biased closed outlet valve. Located preferably between each inlet and outlet valve is a pressure regulator designated for the specific fuel type and controlling the outlet fuel pressure. The device preferably includes a fuel metering apparatus and a shutoff valve that communicate with, and control in part, fuel flow through the fuel flow circuits.

Abstract: A fuel pump noise-reduction apparatus in a Liquefied Petroleum Injection (LPI) vehicle comprises a Liquefied Petroleum Gas (LPG) switch. A plurality of shut off valves are configured for activation upon stoppage of battery power via the LPG switch. A fuel pump in a fuel tank is configured for activation upon stoppage of battery power via the LPG switch. The shut off valves close and the fuel pump stops simultaneously when the LPG switch is deactivated, contributing to a reduction in noise and engine output consumption due to unnecessary operation of the fuel pump when the engine stops.

Abstract: A rotary engine includes a housing defining an enclosed spherical space, a housing chamber formed in an inner surface of the spherical space, a spherical rotor rotatably mounted within the spherical space, and a rotor chamber formed in an outer surface of the rotor. The housing chamber and the rotor chamber form a combustion chamber when in communication with each other. A fuel inlet is in communication with the combustion chamber. At least one expansion chamber is formed in the housing in communication with the enclosed spherical housing space. An exhaust system is in communication with the expansion chamber and the enclosed spherical housing space. The expansion chamber and the exhaust system are positioned to come into communication with the combustion chamber during each rotation of the rotor.

Abstract: A fuel enrichment device includes a body forming a first fuel chamber and a second fuel chamber. The second fuel chamber is adapted to contain a predetermined amount of enriching fuel to be provided to an engine. A normally open valve connects the first fuel chamber to the second fuel chamber. A normally closed valve for controls the provision of enriching fuel to the engine. The normally closed valve is open whenever the normally open valve is closed.

Abstract: Method of regulating an internal combustion engine in order to reach presettable nitrogen oxide emission values of the internal combustion engine, wherein the internal combustion engine is supplied at least some of the time with a first fuel and at least some of the time with a second fuel, the quantity of the first fuel supplied to the internal combustion engine per unit of time being controlled according to a preset control actual value or kept constant and the quantity of the second fuel supplied to the internal combustion engine per unit of time to reach a presettable nitrogen oxide emission value being regulated according to at least one recorded engine parameter.

Abstract: On-off valve intended to be arranged at the outlet of the gas accumulation reservoir in an electronic gas injection system for an internal combustion engine, presenting a valve member made of metallic material, co-operating with a valve seat made in a body, which is also made of metallic material, to ensure the good quality of tightness in all operative temperature and pressure conditions, with prolonged reliability in time.