Abstract: A fuel delivery system which selectively controls two pressure sources to deliver fuel from a tank to the engine for consumption by the engine. The fuel system has a pair of fuel supply passages through which fuel is discharged from the fuel tank to a main fuel supply line for delivery to the engine. One fuel passage communicates with an outlet of an electric fuel pump disposed within the fuel tank. The second fuel passage permits fuel to flow out of the fuel tank into the main fuel supply line independently of the fuel pump within the tank. Preferably, a valve is disposed in the second fuel passage to selectively permit fuel flow through the second fuel passage. The fuel system also has a controller which selectively provides electric power to the fuel pump so that the fuel pump in the fuel tank operates only when it is needed to discharge fuel from the tank.

Abstract: A dynamic fluid sealing system for a fuel injection valve employs sealing-fluid to separate a gaseous fuel and a second fluid in the fuel injection valve, thereby preventing leakage of the gaseous fuel into the second fluid. A pressure-balancing system, which includes a pressure-balancing device, reduces the pressure differential between the sealing-fluid and the gaseous fuel used in the injection valve. At the same time, the pressure balancing system dynamically balances the sealing-fluid pressure such that the sealing-fluid pressure is equal to or slightly greater than the pressure of the gaseous fuel within the injection valve. The pressure differential between the gaseous fuel and the sealing-fluid may be maintained throughout the operating range of engine speeds, engine loads, and fuel cut-off conditions so as to prevent leakage of compressible gaseous fuel into the second fluid.

Abstract: A gaseous fuel adaptor for modifying an internal combustion engine having a liquid fuel carburetor. The carburetor has an air intake for receiving air to mix with a liquid fuel. The adaptor includes a body mounted over the carburetor air intake and a passageway having an inlet and an outlet formed in the body. Air enters the passageway through the inlet and air exits the passageway through the outlet into the carburetor air intake. A gaseous fuel feed port disposed between the passageway inlet and outlet feeds gaseous fuel into the passageway, and a butterfly valve disposed in the passageway between the gaseous fuel feed port and the passageway inlet meters air entering the passageway to mix with the gaseous fuel.

Abstract: A combustion engine fuel system apparatus saturates and diffuses a gas, such a air, into a liquid fuel. The apparatus includes a fuel saturation chamber connected to the engine fuel tank for receiving a liquid fuel therefrom and also connected to a gas compressor for directing compressed gas into the fuel saturation chamber for saturating a liquid fuel being fed therein with the gas. The fuel saturation chamber is connected to a gas diffusion chamber for diffusing gas into the liquid fuel and which is also connected to the gas compressor. A dense porous material, such as a porous stone, is positioned in the gas diffusion chamber for diffusing the gas and liquid fuel together. The saturation and diffused liquid fuel is then fed into a combustion engine. A liquid fuel heater is used to heat the fuel being fed into the fuel saturation chamber.

Abstract: A system intended for pressure supply of liquid fuel to at least one combustion chamber of an internal-combustion engine, includes a tank (1) intended for pressure storage of the liquid fuel, injectors (2) for pressure injection of the fuel into at least one combustion chamber, a line (3) between the tank (1) and the (pressure) injectors (2), a pump (4) placed in the tank (1) or on the line (3), a pressure regulator (5) placed in the tank (1) or on the line (3), and a capacity (canister) (6) placed on a by-pass (7) of the line (3) towards an intake system (A) of the engine and intended for gaseous fuel storage. The fuel injection is performed directly or not into the combustion chamber(s), and a solenoid value (8) for isolating the injectors (2) in relation to the tank (1) and are provided a drain (9) for draining the injectors (2), placed on the by-pass (7), upstream from the capacity (6).

Abstract: A method of operating a computer to automatically produce production control software for a natural gas engine controller or a diesel engine controller is provided. The method includes the steps of (1) as a function of user input, defining a set specifications of the controller; and (2) producing control software to operate the controller as defined by the specifications.

Abstract: A fuel supply system for an internal combustion engine utilizing hydrogen, natural gas or other alternate fuel is described which includes a pressure vessel for containing liquid fuel in a first compartment and gaseous fuel in a second compartment, the compartments separated by a movable piston configured to maintain the fuel in liquid and gaseous phases by maintaining constant, but different pressures, respectively, in the two compartments regardless of fuel quantity in either compartment. A thermal expansion system interconnecting the two compartments draws fuel from the first compartment and expands the fuel to a superheated gas into the second compartment for transfer to the engine.

Abstract: Fuel proportioning in a gas-powered combustion engine is effected so that when the value of a parameter monitored in the exhaust gases deviates from a set-value, the level of the gas input pressure to a mixer for gas and air is adjusted in a specified operating situation so that said set-value is established. A device for fuel proportioning includes a pressure regulator (3) whereby the outlet pressure can be adjusted automatically during a specified operating situation by means of a control unit (11). After adjustment has been carried out, the setting reached is maintained for a lengthy period.

Abstract: Diesel engine conversion kit wherein said kit arranged at the engine air inlet of a diesel engine to be transformed, comprises three different pieces defining an air inlet means, gas feeding means and flux regulating means. Said air inlet means comprises a hollow cylindrical piece with a central narrowed position affixed to said gas feeding means. Said gas feeding means comprises passages whose arrangement coincides with the arrangement of the above cited inlet. Inside said passages feeding gas tubes including long gas exit grooves, are lodged. Finally said flux regulating means comprises a plate with two feeding passages in coincidence with the above cited passages of gas feeding means, each including choker plates with a common regulating means.

Abstract: A fill block is provided for a CNG fuel system for a transit bus or similar vehicle. The fill block includes a integral one piece body having first and second ends defining a length therebetween. The body has a main bore defined therein. A ball valve is received in the body and has a handle extending from the body. The ball valve is movable between open and closed positions, wherein the main bore is opened and closed, respectively. A fueling port is defined in the body and communicated with the main bore. A defueling port is defined in the body and communicated with the main bore. A fueling receptacle is connected to the fueling port. A defueling receptacle is connected to the defueling port. A defueling valve is provided for selectively communicating the defueling port with the main bore or isolating the defueling port from the main bore.

Abstract: An apparatus and method for generating an autoignition substance such as DME for operating a diesel-type engine 12 with natural gas. A multi-stage reformer 18 is connected to a supply of natural gas 20 to receive a portion therefrom for production of an autoignition substance for supply to the microigniters 14 within a diesel-type engine 12. An engine control unit 24 in communication with a microcontroller 22 receives signals from sensors within the engine 12 and multi-stage reformer 18 for optimizing engine performance and generation of autoignition substances thereto. The apparatus and method of the present invention allows the operation of a diesel-type engine with natural gas as the primary or even the sole fuel by providing an autoignition substance in situ.

Abstract: In an internal combustion engine, which is operated with gaseous fuel, each intake passage has an intake valve, and a gas-injection nozzle is arranged in the end region of each intake passage outside of the combustion chamber. The gas-injection nozzle is used to form a coherent gas spray, which is injected at a high velocity directly into the combustion chamber in the cylinder. The gas spray is injected intermittently and is coordinated with the opening movement of the intake valve. The gas spray of gaseous fuel is first mixed with the air in the combustion chamber, where the high kinetic energy of the gas spray produces a high turbulence and results in an efficient mixing of the fuel with the air.

Abstract: A fuel control system for delivering gaseous fuel from a source to a gas-operated engine that includes a normally open electronic control valve connected between the fuel source and the engine, and responsive to electronic valve control signals for variably closing connection between the source and the engine. An electronic control unit supplies the electronic valve control signals responsive to engine operation. The electronic control unit includes facility for responding to termination of engine operation by automatically generating a valve control signal to hold the valve fully closed for a preselected time duration. This preselected time duration preferably includes a fixed minimum time duration and a user-programmable additional valve closure time duration.

Abstract: A gaseous-fueled reciprocating internal combustion engine includes a carburetor having a throttle valve that is controlled by a speed governor. A proportional fuel control valve is disposed intermediate a fuel supply and the carburetor, and is controlled by an air fuel computing device. The computing device generates a control signal to adjust the fuel control valve based on a governor sensed variable indicative of engine speed, sensed engine torque, a governor output signal from the governor indicative of an opening position of the throttle valve wherein 100% corresponds to a wide open throttle position, and 0% corresponds to a closed position, and a lean combustion control map containing predetermined set point values stored in memory.

Abstract: A device suitable for supplying a gaseous fuel to an internal combustion engine having combustion chambers includes an evaporator with a metering device, the metering device on an inlet side being in communication with an evaporating chamber disposed within the evaporator, and on an outlet side being provided with a main pipe, the main pipe downstream from the metering device branching into a number of pipes connected to individual combustion chambers. Each pipe is provided with a fixed predetermined local constriction, across which at least 85% of the pressure drop from the division of the main pipe into the individual pipes to the combustion chambers takes place, whereby the differences in the flow resistances of the local constrictions of the individual pipes are 5% at most.

Abstract: A method of controlling a internal combustion engine assembly is disclosed. The internal combustion engine assembly includes (i) a internal combustion engine having an engine inlet and an engine outlet, (ii) a mixing chamber having an air inlet, a gaseous fuel inlet, and a fuel-air mixture outlet, (iii) a fuel valve which controls a ratio of air-to-gaseous fuel in a fuel-air mixture advanced through the fuel-air mixture outlet of the mixing chamber, and (iv) a throttle operable to control flow rate of the fuel-air mixture which is advanced from the fuel-air mixture outlet to the engine inlet. The method includes the step of determining oxygen content of exhaust gases advanced through the engine outlet and generating a oxygen content signal in response thereto. The method further includes the step of determining a load on the internal combustion engine and generating a load signal in response thereto.

Abstract: A device for the control of the delivery of the gas in self-propulsion gas systems, in methane gas systems in particular. The system includes a gas cylinder under high pressure, a pipeline which conveys the gas from the cylinder to the engine and devices for controlling the flow and pressure of the gas in the pipeline. A device includes a manual valve or cock (18) per cylinder, at least one pressure reducing valve (19) and one solenoid valve (20), which are integrated into one unit (16), which has a body with channels for the gas between an inlet (I) of the gas under high pressure and an outlet (U) for the gas under the desired reduced pressure. The unit is attached, as a single entity, at the inlet, to the cylinder, and, at the outlet, to the gas pipeline directed towards the engine to be fed.

Abstract: A fuel control system for delivering gaseous fuel from a source through an air/fuel mixture to a gas-operated engine that includes at least one sensor for operative coupling to the engine to provide at least one electronic sensor signal responsive to engine operating conditions. An electronic control unit is responsive to the sensor signal(s) for providing a fuel control signal indicative of a desired quantity of fuel to be delivered to the engine. A pressure regulator, for disposition between the fuel source and the fuel/air mixture, is responsive to the fuel control signal for controlling delivery of gaseous fuel to the mixer. The pressure regulator includes a housing having an inlet for connection to the fuel source and an outlet for connection to the mixer. A valve is disposed within the housing and biased toward closure by a primary pressure regulating spring for controlling flow of fuel from the inlet to the outlet.

Abstract: The invention relates to a method for converting heat into work, a gaseous fuel being compressed and subsequently burnt and a drive means 2 being moved due to volumetric expansion generated as a result of combustion. In order to allow low-pollutant combustion, there is provision, according to the invention, for the compressed gaseous fuel to be burnt in a porous body 8.

Abstract: An internal combustion engine that is driven by fuels such as dimethyl ether (DME) that have a viscosity less than 1.0 and a storage and delivery system for the fuel that will reduce considerably the emissions of NO.sub.x and particulate. The fuel delivery system includes a fuel injector nozzle valve being forced closed by fuel that has leaked past a solenoid operated valve and is at a pressure less than the valve opening pressure.

Abstract: The gas engine with a gas fuel reforming device thermally decomposes CH.sub.4, a major component of natural gas, into a reformed fuel of CO and H.sub.2 to increase the heat produced and thereby reduce the CO.sub.2 content in the exhaust gas and prevent the formation of NO.sub.x. The gas engine mixes CH.sub.4 with CO.sub.2 and sends the gas mixture to the catalyst reactor installed in the exhaust passage where the gas mixture is thermally decomposed into a reformed fuel by using the thermal energy of the exhaust gas. CO.sub.2 is extracted from the exhaust gas by the CO.sub.2 supply device which in turn sends the CO.sub.2 to the catalyst reactor. The CO.sub.2 supply device comprises a CO.sub.2 dissolving device that accommodates a solution to dissolve CO.sub.2 of low-temperature exhaust gas and a CO.sub.2 delivery device installed in the exhaust passage through which high-temperature exhaust gas flows and adapted to release CO.sub.2 from the solution supplied from the CO.sub.2 dissolving device. The CO.sub.

Abstract: A fuel delivery control system suitable for use with internal combustion engines fueled by liquid propane gas or the like. A stepper motor actuated control valve 52, under the control of a closed-loop fuel control logic routine, meters the desired fuel delivery rate. The stepper motor 50 is initially positioned based on an open-loop value related to the given engine speed and load. The stepper motor position is thereafter controlled by a calibrateable function having engine speed as its input.

Abstract: A valve for flowing gaseous fuel, i.e., natural gas or propane gas, to an internal combustion engine includes a valve body having an inlet passage and first and second outlet paths in parallel with one another and in flow communication with the inlet passage. A plug-type adjustment member is threaded into the body and an annular seat in the body coacts with the adjustment member to form an orifice in the first outlet path. A stop mechanism limits movement of the adjustment member between a first position at which the orifice area is smaller and a second position at which the orifice area is larger. The valve permits adjustment of fuel flow to small engines so that such engines provide maximum power without exceeding applicable emission standards. And the valve is tamper-resistant.

Abstract: A method and device for converting conventional engines to a natural gas fueled engine, having a means of withdrawing compressed natural gas from a storage supply at a low pressure, combining the natural gas with atmospheric air from the engine's air cleaner, pressurizing the air and gas mixture by means of a convergent-divergent nozzle and allowing the air/gas mixture to enter the engine's induction manifold at high pressure. This is accomplished without modification to the original engine cylinder, while increasing the engine power and minimizing exhaust emissions.

Abstract: The controls for controlling the supply of natural gas fuel for a vehicle are integrated together in a module which is located at the gas tank. Such controls include a high pressure regulator for lowering the pressure of the gas flowing from the tank and an electronically controlled solenoid valve which shuts off the gas flow when no fuel is required by the engine and when the gas pressure in the tank falls below a predetermined value. Also included in the module are a pressure sensor for providing signals for controlling the shutoff valve; a check valve which permits one way flow of gas into the gas tank when it is filled; a pressure relief mechanism responsive to the temperature and pressure sensors for allowing safe release of the gas to the outside should the temperature rise above a predetermined limit.

Abstract: Engine (60) has manifold (62) and includes an air pathway (20) and a fuel line (30) coupled to the manifold (62) for supplying a fuel charge. Fuel line (30) has a controllable valve (40) for regulating fuel flow and a first sensor (38) providing a fuel signal corresponding to mass flow rate of fuel through the fuel line. A second sensor (65) provides a speed signal corresponding to rotational speed of the engine. A third sensor (63) provides a temperature signal corresponding to temperature within the manifold. A fourth sensor (64) provides a pressure signal corresponding to pressure within the manifold. A fifth sensor (76) provides an exhaust signal corresponding to air/fuel ratio for combusted air and fuel in the exhaust pathway. A controller (80) responsive to the controllable valve (40) and sensors (38), (63), (64), (65), and (76) determines an air signal corresponding to the mass flow rate of air through the air pathway (20) as a function of the speed signal, temperature signal, and pressure signal.

Abstract: A fuel admission valve for metering gas without using a mass flow sensor. The valve uses a flow control element and nozzle, an actuator, a fuel supply pressure sensor, a fuel supply temperature sensor, a flow control element position sensor, and a flow control circuit to meter gas in sonic flow with insensitivity to the discharge pressure.

Abstract: A gas storage apparatus for use in storing a gas including methane as a main component thereof is disclosed. The apparatus includes an entrance/exit opening for allowing entrance or exit therethrough of a gas to be stored, a gas-tight maintaining mechanism capable of maintaining the gas under a pressurized state inside a container, and a pressure vessel which may be constantly maintained at a normal temperature. The pressure vessel accommodates therein an organometallic complex having a one-dimensional channel structure.

Abstract: In an internal combustion engine, natural gas is injected through a nozzle (17) into a curved feeding pipe (13), tangentially and in opposite direction to the flow of combustion air. Two nozzles (17) that are spaced apart in the flow direction and that alternately inject the natural gas are preferably used in order to achieve a homogenous distribution of fuel in the fuel-air mixture. A conical stream (21) ensures an impeccable mixture of gas with the totality of supplied air.

Abstract: A method and apparatus for testing leaks in a compressed natural gas fuel system on an assembly line. The apparatus includes a filling receptacle, a filling conduit, a fuel tank assembly, a supply conduit, a pressure regulating assembly, and a joint box. The filling conduit extends between the filling receptacle and the fuel tank assembly. The supply conduit extends between the fuel tank assembly and the pressure regulating assembly. The joint box includes a valve which regulates fluid communication between the filling conduit and the supply conduit. In the method according to the present invention, the tank assembly is fluidly isolated from the remainder of the fuel system and the filling conduit and supply conduit are fluidly connected, by opening the joint box valve, to permit pressurization and leak detection of a first portion of the fuel system.

Abstract: The present invention relates to an injection system for an internal combustion engine operated with liquefied petroleum gas and with a plurality of injection nozzles for the direct injection of fuel into the cylinders of the internal combustion engine, which injection system comprises the following:a fuel supply system in which fuel is held under a gas pressure;a high-pressure pump in order to make fuel available which stands under injection pressure;a high-pressure line which is connected with the high-pressure pump in order to supply the fuel being under injection pressure to the injection nozzles.A secure operation is achieved in such a way that a control line is provided further which can optionally be brought into connection with the injection nozzles, with fuel being present in the control line having a pressure which is higher than the gas pressure.

Abstract: A second operation mode without a hold period is used for starting up an engine when the ambient temperature is extremely low so that an electromagnetic coil remains fed with the current until the valve opening is completed, thus ensuring elimination of an injection valve cling up. A full opening of the injection valve is recognized by detecting a decrease of a coil current in the electromagnetic coil. The lower the temperature where the cling up is hardly eliminated in a short period, the longer the energizing period for the coil is provided. Consequently, such an event as failing to eliminate the cling up due to too short of the energizing period will be prevented.

Abstract: A gaseous fuel direct injection fuel system for a spark ignited internal combustion engine having an inlet port for admitting combustion air into a combustion chamber of the engine, the direction injection system including at least one fuel injector for directly injecting gaseous fuel into the combustion chamber, and means for supplying gaseous fuel to the fuel injector, a quantity of gaseous fuel being injected into the combustion chamber by the fuel injector, wherein at least at some operating condition thereof, the injection of the gaseous fuel is initiated after the closing of the inlet port, and wherein the injection of the gaseous fuel is completed before the compression stroke of the engine is substantially completed.

Abstract: A combined system and method is shown and described which uses a vaporous fuel mixture energy source comprised of air and a vaporous fuel as a source of fuel for an internal combustion engine. This mixture of air and vaporous fuel is injected into each one of a plurality of cylinders of an internal combustion engine. The air and vaporous fuel mixture is cooled prior to being injected into the internal combustion engine. In another embodiment, an electric generator is coupled to the internal combustion engine.

Abstract: A carburetor (2) to supply a mixture of fuel gas and combustion air to a reciprocating internal combustion engine. The carburetor has a venturi (4) and a throttle (10) including a throttle valve (24). A tear-drop shaped obstruction (36) is mounted in the venturi throat (18) on diametrically opposed radial arms (66). The narrowest part of the tubular gap (46) between the walls of venturi (4) and the obstruction (36) is at gap (48). A continuous slot (50) in the throat wall (18) encircles the obstruction and opens into gap (48). Another continuous slot (70) encircling the obstruction (36) is formed therein and also opens into the gap (48). Fuel gas is supplied to the slots (50 and 70) through passages (52, 74 and 72).

Abstract: A fuel supply system is described which allows the use of a disposable fuel tank prefilled with the required fuel mixture. The system includes a mounting bracket having a fuel coupling, a disposable tank, and a venting manifold.

Abstract: A fuel supply system is provided for an internal combustion engine. The system comprises a fuel control valve metering fuel to the inlet of the engine and a governor for monitoring the output of the engine and adjusting the fuel control valve. A first fuel of low quality is fed to the inlet of the engine through a first valve regulating the supply of the first fuel. A fuel mixture controller responds to output signals from the governor and adjusts the position of a second valve for regulating the supply of a second fuel of high quality. The first and second fuels are combined in a mixture before being fed to the fuel control valve and the inlet of the engine.

Abstract: Engine (60) has manifold (62) and includes an air pathway (20) and a fuel line (30) coupled to the manifold (62) for supplying a fuel charge. Fuel line (30) has a controllable valve (40) for regulating fuel flow and a first sensor (38) providing a fuel signal corresponding to mass flow rate of fuel through the fuel line. A second sensor (65) provides a speed signal corresponding to rotational speed of the engine. A third sensor (63) provides a temperature signal corresponding to temperature within the manifold. A fourth sensor (64) provides a pressure signal corresponding to pressure within the manifold. A fifth sensor (76) provides an exhaust signal corresponding to air/fuel ratio for combusted air and fuel in the exhaust pathway. A controller (80) responsive to the controllable valve (40) and sensors (38), (63), (64), (65), and (76) determines an air signal corresponding to the mass flow rate of air through the air pathway (20) as a function of the speed signal, temperature signal, and pressure signal.

Abstract: A gaseous fuel injection system for use with a combustion engine having a throttle cable. The system include a supply tank connected to a pressure regulator connected to a throttle assembly, and a safety valve preventing fuel flow when the engine is not operating. The throttle assembly includes a tubular throttle body having opposing open ends, with one end securable to an intake manifold of the engine. A control rod extends transversely through the throttle body, and an air intake valve is secured to the control rod within the throttle body, so that rotating the control rod controls air intake into the intake manifold. A fuel valve is attached to the throttle body and includes a valve body defining a fuel outlet connected to a fuel injector extending into the throttle body. The fuel valve also includes a needle closing the fuel outlet and extending out of the valve body.

Abstract: A fuel supply controller includes a passage connecting an engine and a fuel tank. An electromagnetic valve is provided in the passage to open and close the passage in stages. The controller controls the electric current flowing through the electromagnetic valve based on information related to the amount of fuel flowing from the fuel tank to the engine.

Abstract: According to the present invention, there is provided a liquid discharging device for discharging liquid stored on a bottom wall of an interior of a compressed natural gas tank of a vehicle, comprising a liquid discharging pipe for discharging the liquid from the compressed natural gas tank to an outside of the compressed natural gas tank. The liquid discharging pipe has an open end which is open into the interior of the compressed natural gas tank at a position adjacent to an inner face of the bottom wall of the compressed natural gas tank. Further, the liquid discharging device comprises a liquid discharging control valve arranged in the liquid discharging pipe to discharge the liquid due to the pressure of the natural gas when the liquid discharging control valve is opened.

Abstract: A standard diesel injection system and a mechanical direct-gas injection system are selectively operable, in combination with a continuous pilot injection system, to provide a combustion system that is capable of operating in either a conventional diesel mode or a dual-fuel mode. Operation between convention diesel or dual-fuel combustion modes is mechanically controlled by a two-position, four-way control valve. The mechanical direct-gas injection system is actuated by pulsed diesel fuel directed to the actuation chamber of a gas injector by the same injection pump used to provide diesel fuel to the combustion chamber during conventional diesel operation.

Abstract: A fuel injection system for injecting liquid LPG or CNG into an air inlet duct of an internal combustion engine. The fuel injection system including an adaptor ring which is adapted to be mounted into the air intake duct for the engine upstream or downstream of the throttle valve in the inlet duct so as to allow air flow through. There is at least one pod mounted into the adaptor ring with each pod including a fuel inlet, a fuel outlet and a hollow space within the pod into which the fuel inlet and fuel outlet open and a liquid fuel injector mounted into the or each pod. Fuel enters the injector from the hollow space within the pod to be injected therefrom into the inlet duct. An injector control arrangement acting upon engine parameters and demand parameters controls the or each injector to inject liquid fuel into the engine as required. Each of the injectors may be bottom feed flow-through injectors.

Abstract: A system is disclosed for handling, storing, transporting and dispensing cryogenic fluids, liquid natural gas, compressed natural gas, and their equivalents. A fuel injection system is disclosed for directly injecting LNG into an engine's combustion chamber. Such systems include a railroad system in which a container of fuel is carried on a flat car behind a locomotive and the, e.g. liquid natural gas, is conveyed to the locomotive with appropriate valves, conduits, pumps, and controls. In one aspect a fuel fluid, liquid, or vapor is injected into an intake (e.g., an air intake) of an engine. In one aspect a fueling station has been invented for providing services of dispensing LNG and/or CNG for engines.

Abstract: A multipoint fuel delivery system for an internal combustion engine includes fuel metering device(s) such as fuel injector(s) associated for selectively controlled injection of the second fuel to corresponding combustion chamber(s) of the internal combustion engine. A fuel supply manifold associates with fuel injector(s) for directing the second fuel to each fuel injector. An intake port adaptor mechanism adapts the intake port of the associated combustion chamber to receive the selectively controlled injection of the fuel from an associated fuel injector. The intake port adaptor mechanism may also engage the intake port so as to permit selective flow of the first fuel or the second fuel to the intake port of the selected combustion chamber. A control mechanism selectively controls the flow of the second fuel through each injector(s).

Abstract: A lawn mower which is powered by an engine that uses gaseous fuels, such as liquified petroleum gas (LPG), compressed natural gas (CNG) or liquified natural gas (LNG). It may be either built originally to use gaseous fuels, or it may be converted from using liquid hydrocarbon fuels such as gasoline or diesel fuel. It may also use a combination of gaseous and liquid hydrocarbon fuels. The lawn mower may be hand-pushed or be self-propelled. It may include a fuel injector having a cylindrical main body housing, a coupling connecting a fuel hose and the main body housing, a gaseous venturi retained within the main body housing, an air intake in the main body housing, a sleeve that can slide over the air intake, and a docking collar with a plurality of slots that fits over the main body housing. The fuel injection system uses blow-by to recirculate any unused fuel or air thereby increasing the efficiency of the injection system. The fuel injection system can be automated or operated manually.

Abstract: A gas fuel admission system for use with a gas fuel supply and an internal combustion engine having an engine control unit that produces a desired mass flow signal. The system has a continuously variable gas fuel admission valve having a flow control element and nozzle for metering gas in sonic flow from the gas supply to the engine with insensitivity to the valve discharge pressure. An actuator moves the flow control element relative to the nozzle. The system also has a flow control circuit that responds to the desired mass flow signal from the engine control unit, a gas supply pressure signal from a gas supply pressure sensor, a gas supply temperature signal from a gas supply temperature sensor, and a flow control element position signal from a flow control element position sensor to determine the appropriate flow control element position needed to achieve the desired mass flow at the present engine operating conditions.

Abstract: The invention relates to an apparatus and method for supplying high pressure gaseous fuel from a storage vessel to an internal combustion engine of a vehicle, or for other uses.

Abstract: A fuel pressure relief system for a dual fuel engine including at least one gaseous fuel admission valve positioned between a gaseous fuel inlet region and an air intake region is provided. The system includes a first pressure sensor positioned in the gaseous fuel inlet region and a second pressure sensor positioned in the air intake region. An electronic controller is connected to the first pressure sensor and the second pressure sensor. A gaseous fuel vent path extends between the gaseous fuel inlet region and a portion of an air intake path of the engine. A vent valve is positioned along the gaseous fuel vent path and is connected to the electronic controller for control thereby. When the differential pressure across the gaseous fuel admission valve exceeds a predetermined level the fuel vent valve is opened to relieve the pressure.

Abstract: A gas storage apparatus for use in storing a gas including methane as a main component thereof is disclosed. The apparatus includes an entrance/exit opening for allowing entrance or exit therethrough of a gas to be stored, a gas-tight maintaining mechanism capable of maintaining the gas under a pressurized state inside a container, and a pressure vessel which may be constantly maintained at a normal temperature. The pressure vessel accommodates therein an organometallic complex having a one-dimensional channel structure.