Abstract: Engine system comprising a compression ignition engine (20) including at least one combustion chamber and a cold flame vaporizer (40) in which a fuel is partially oxidized in preheated air to form a cold flame gas. The cold flame vaporizer (40) is in fluid communication with the combustion chamber of the compression ignition engine (20). There is further provided means (50) for supplying air such that the cold flame gas can be mixed with the additional air before being injected into the combustion chamber, and means (22) for injecting a pilot fuel into the combustion chamber, thereby producing a pilot flame in the combustion chamber which ignites the mixture of cold flame gas and air. There is also provided a method for a substantially NOx-free combustion of diesel fuel in a compression ignition engine (20).

Abstract: A system for method for emptying a gas storage tank of a vehicle is presented. In one example, engine valve timing is adjusted to facilitate reducing pressure within the gas storage tank. The system and method may extend the use of the gas stored in the gas storage tank.

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 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 the propane injected into the engine air intake.

Abstract: A control unit sets a transition determination filter value determining a transition operation state of an engine, and calculates a transition determination intake pipe internal pressure from the transition determination filter value, a previously detected intake pipe internal pressure, and a currently detected intake pipe internal pressure. When the time after the start of the engine exceeds a predetermined value, the unit calculates a transition determination intake pipe internal differential pressure from the currently detected intake pipe internal pressure and the transition determination intake pipe internal pressure.

Abstract: A fuel supply and combustion chamber system for a portable power tool, such as, for example, a fastener-driving tool, wherein the fuel supply and combustion chamber system can utilize liquid fuels. The fuel supply and combustion chamber system can comprise multiple combustion chambers for achieving predetermined combustion and power output characteristics. In addition, the fuel supply and combustion chamber system can utilize portioning valve structures for providing predetermined amounts of either a gaseous or liquid fuel into the portable power tool combustion chamber.

Abstract: A carburetor for a gas powered internal combustion engine having a plurality of pressure reducing stages for reducing the pressure of the gas phase in a liquified petroleum gas storage bottle prior to the mixing of the gas phase of the liquified petroleum gas with ambient air.

Abstract: An engine fuel feeding device that is small-sized and easy to start. A cutoff valve is disposed upstream from a primary regulator provided to a fuel passage from a fuel feeding source to an engine. The cutoff valve is provided integrally with the primary regulator. When the gas engine is stopped, the fuel feeding passage is blocked in front of the primary regulator, gas fuel does not flow in the downstream direction that includes the primary regulator, and the ability of the gas engine to start is enhanced.

Abstract: A liquefied natural gas system for a natural gas vehicle engine with flow driven by the engine includes dual flow paths through at least one heat exchanger. A return path extends from the dual flow paths to the storage tank, and an engine feed path extends from the dual flow paths configured to couple to the engine. A valve and control system are coupled to the dual flow paths capable of alternating flow through the dual flow paths so that one flow path supplies the engine through the engine feed path while the other flow path pressurizes the storage tank through the return path.

Abstract: A gas circulation engine includes a combustion chamber to which high-pressure fuel in a first high-pressure fuel supply passage, an oxidant and working gas are supplied; a circulation path that connects an intake-side portion and an exhaust-side portion of the combustion chamber to each other; a fuel bleed-off tank into which the high-pressure fuel in the first high-pressure fuel supply passage is bled off; a fuel bleed-off valve that permits or shuts off communication between the first high-pressure fuel supply passage and the fuel bleed-off tank; and a fuel bleed-off control unit that permits communication between the first high-pressure fuel supply passage and the fuel bleed-off tank by opening the fuel bleed-off valve when the engine is stopped, the communication between the first high-pressure fuel supply passage and the fuel bleed-off tank being shut off during operation of the engine.

Abstract: A charge air cooler assembly for an internal combustion engine is described. A housing of the charge air cooler assembly includes a dividing wall that separates flow after the charge air cooler into two separate flow paths.

Abstract: A genset engine that operates on an open loop EFI system and runs on gaseous fuels is described. The integration of various air sensors, including for example a manifold air temperature (MAT) sensor, a manifold absolute pressure (MAP) sensor, or an air flow sensor(s), can provide optimal engine performance when using gaseous fuels and when starting from a cold state. The sensors employed send data to the electronic control unit (ECU) and such data is used to determine the optimal air-to-fuel ratio (AFR). The ECU actuates the injector and the injector sends the requested amount of gaseous fuel to mix with the air flow to be combusted. This provides the engine with a gaseous fuel and air mixture that is at the requested relative AFR and the engine is able to start and meet performance.

Abstract: An engine assembly may include an engine structure, an intake manifold, and a liquefied petroleum gas (LPG) fuel assembly. The engine structure may define a combustion chamber and the intake manifold may be in communication with the combustion chamber. The LPG fuel assembly may include a LPG fuel tank containing LPG fuel, a liquid LPG fuel injection system in communication with the LPG fuel tank and the combustion chamber, and a vapor LPG fuel injection system in communication with the LPG fuel tank and the intake manifold.

Abstract: Disclosed herein is a class of gas carburettor (9) for low calorific value gas for A/F ratio control to be used engines operating on producer gas with a load following capabilities. The gas carburettor has A/F ratio from 1.2:1 for producer gas to about 5:1 for biogas. The gas carburettor of the present invention has right A/F control at varying load conditions due to its optimized dimensions at the throat (7) and area ration control flapper (6) along with the zero pressure regulators. Additionally, using a by-pass facility starting the engine is established. By the use of a zero pressure regulator on the gas line, the gas pressure in the air and gas lines are maintained nearly the same downstream of the carburettor which helps in managing the appropriate air-to-fuel ratio based on the gas and air passage areas.

Abstract: A process in which liquid fuel is saturated with a gas to provide a fuel/gas solution said fuel/gas solution fed to a combustion engine, a first portion of said fuel/gas solution that is fed to said combustion engine is combusted, a second portion of said fuel/gas solution that is fed to said combustion engine is not combusted, the temperature of said second portion of said fuel/gas solution is reduced in a heat exchanger to produce a reduced temperature second portion, evaporated gas in said reduced temperature second portion is then removed in a separator, and the fuel/gas solution thus produced is then fed back into the combustion engine.

Abstract: The invention proposes a method for controlling a stationary gas motor (1), wherein a rotational speed control deviation is calculated from a target rotational speed (nSL) and a current rotational speed (nIST), a target torque is determined from the rotational speed control deviation as the controlled variable, wherein a mixture throttle angle (DKW1, DKW2) is determined for the determination of a mixture volume flow and of a current mixture pressure (p1 (IST), p2(IST)) in a receiver pipe (12, 13) upstream of the intake valves of the gas motor (1) as a function of the target volume flow, and wherein a gas throttle angle is determined for determining a gas volume flow as the gas content in a gas/air mixture, also as a function of the target volume flow.

Abstract: Disclosed is a method and corresponding fuel injector for injecting gaseous and liquid fuel into an engine. The method comprises delivering a liquid fuel to a fuel injector, delivering a pressurized gaseous fuel to the fuel injector, entraining the liquid fuel within the gaseous fuel within a chamber of the fuel injector and injecting the gaseous fuel and atomized liquid fuel into the combustion chamber. The liquid fuel can be passed through and dispensed from a needle into a chamber in the injector nozzle where it is entrained in the gaseous fuel during an injection event. The liquid/gas mass ratio is controlled by the needle movement, hydraulic resistances or electronic valves so that the majority of the liquid is injected during the first part of the gas injection. The injector can be used for late cycle direct injection of natural gas, or any number of gaseous fuel blends combined with many liquid fuels such as diesel, biodiesel and DME.

Abstract: A work machine to which a cassette gas cylinder is detachably attached is disclosed. The cassette gas cylinder is accommodated inside a gas cylinder case. The gas cylinder case for accommodating the cassette gas cylinder is detachably attached to the work machine so that the gas cylinder case wherein the cassette gas cylinder is accommodated can be transported together with the cylinder.

Abstract: An engine having cylinders capable of combusting gaseous fuel includes at least one spark plug per cylinder, a gaseous fuel injector extending into each cylinder and having at least one nozzle cluster containing a one or more nozzles positioned to direct gaseous fuel only toward a spark gap of an associated spark plug, and a control system operating each spark plug and each injector to deliver gaseous fuel directly to the cylinder and initiate combustion. A method for controlling an engine capable of operating with gaseous fuel includes injecting the gaseous fuel directly into each cylinder through a centrally located injector having a plurality of clusters of nozzles, each cluster associated with one of at least two spark plugs positioned closer to a cylinder wall than to the injector, each cluster directing the gaseous fuel toward an associated spark plug gap.

Abstract: Various embodiments include two-stroke stratified engines and dual passage carburetors for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. A stratified air-head engine and low pressure fuel injected engines with fuel only tube is included.

Abstract: A stratified scavenging two-cycle engine (10) comprising an engine body (11), a carburetor (12) equipped with a pivotable rotary valve (22) for switching between opening and closing of a single intake path, and an insulator (13) having heat insulating performance. The rotary valve (22) of the carburetor (12) is provided with a fuel injecting nozzle opening (26) open downward. The nozzle opening (26) is provided with a guide section (26A) by which fuel from the nozzle opening (26) is guided to a position corresponding to a position upstream in a mixed gas path (27).

Abstract: A system for improving distribution of gases within an intake manifold of an engine is presented. The system may be used to improve engine air-fuel control. In one example, turbulence of gases entering an intake manifold is increased.

Abstract: A stratified scavenging two-cycle engine (10) comprising an engine body (11), a carburetor (12) equipped with a pivotable rotary valve (22) for switching between opening and closing of a single intake path, and an insulator (13) having heat insulating performance. The rotary valve (22) of the carburetor (12) is provided with a fuel injecting nozzle opening (26) open downward. Fuel from the nozzle opening (26) is injected in the directions corresponding to a mixed gas path (27) and to that portion of an air path (28) which is upstream in the mixed gas path (27).

Abstract: A method of using hydrocarbon fugitive gases diluted with air as a primary or supplementary fuel for an engine. The composition of the fugitive gases and air in ensured to fall outside the upper and lower explosive limit for the composition. The total volume of the composition is also calculated to be maintained within a predetermined percentage of the volume of the primary fuel supplied to said engine.

Abstract: A method of providing fugitive gases to an engine air supply. An air filter is positioned on the engine intake of said engine. The air filter creates a negative pressure in the engine intake downstream of the air filter. A source of fugitive gases pass to the engine intake and are collected by the negative pressure downstream of the air filter.

Abstract: A method of operating an internal combustion engine comprises the steps of (a) pressurizing a liquid fuel to a pressure above 150 psig; (b) heating the liquid fuel to a temperature above 500° F. to produce a heated liquid fuel; (c) suddenly reducing the pressure of the heated liquid fuel sufficiently to vaporize the heated liquid fuel to form a vaporized hot fuel; (d) combining the vaporized hot fuel with oxygen to form a vaporized hot fuel/oxygen mixture; (e) introducing the vaporized hot fuel/oxygen mixture into the internal combustion engine; and (f) combusting the vaporized hot fuel/oxygen mixture within the internal combustion engine.

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: An engine system in which hydrogen is employed as a fuel, including a reactor configured to cause a reaction using a catalyst, in which the reactor is constituted by alternately disposing plural exhaust passages and plural fuel passageways of the engine system with a wall interposed therebetween; at least one carrier configured to carry the catalyst and to be formed in a substantially rectangular plate shape is fitted in at least one of fuel passageways; and the carrier is provided with a plate portion which has a surface disposed in a fuel flowing direction and is formed in a substantially rectangular plate shape and at least one slit portion which divides the surface of the plate portion in the fuel flowing direction.

Abstract: High pressure regions (31H to 35H) and low pressure regions (31L to 34L) are created based on the exhaust gas flow at curves in an EGR pipe (30), thereby enabling the exhaust gas pressure at inlets (21b to 26b) of gas introduction passages (21a to 26a) to be adjusted. Accordingly, regardless of the number of cylinders or whether the lengths of the flow paths of the EGR pipe (30) are the same, the exhaust pressure at the inlets (21b to 26b) of the gas introduction passages (21a to 26a) can be appropriately adjusted so any difference in pressure of exhaust gas introduced into branch pipes (21 to 26) can be reduced. In this way, the EGR rates of the cylinders can be made closer or the same such that stable combustion can be achieved, thus enabling stable engine operation to be maintained. The EGR pipe (30) is arranged weaving closely between the branch pipes (21 to 26) so space efficiency can be improved and a sufficient amount of exhaust gas can be introduced evenly into the cylinders.

Abstract: There is described a method for operating an automation system which comprises at least two measuring modules, each connected to a higher order processing unit in order to communicate therewith. The higher order processing unit is informed of an event that is recorded by one of the at least two measuring modules. The processing unit then informs any available measuring module of the event.

Abstract: A novel flow control device for metering a preferably gaseous fuel to an internal combustion engine is disclosed. The innovative flow control device maintains a predetermined air-fuel ratio, while automatically compensating for variations in the energy content of the fuel. A rotary-flap airflow meter directly drives a preferably butterfly-type main valve, the latter metering a main fuel dose, calibrated to provide an air-fuel ratio slightly leaner than desired, over the entire engine operating domain. A rotary, or linear, trim valve meters a trim fuel dose, used to additively adjust the mixture to the desired quality. A drive member, rigidly joined to the rotary air flap, drives said trim valve, through a variable-ratio lever mechanism. The lever fulcrum is linearly moveable, independently of cam position, thereby altering the lever ratio and subsequently, the corrective fuel dose, over a substantially wide flow range.

Abstract: Provided in a gas-feed system, in particular a system for supplying methane or hydrogen to an internal-combustion engine, is an electronic pressure-reducer or pressure-regulator unit, integrated in which are both a pressure-reducing valve for reducing the pressure of the gas coming from the fuel tank to a value suitable for supplying a distribution manifold or rail and a modulating solenoid valve that functions as modulator of the degree of pressure reduction performed by the pressure-reducing valve. Likewise made in the body of said unit are passages that provide the communications of said valves with one another and of each of said valves with the inlet and the outlet for the gas in said unit. Furthermore, the unit incorporates an electronic control module for controlling the modulating solenoid valve.

Abstract: The present invention refers to a method of using lean fuel-air mixtures at all operating regimes of a spark ignition engine, which is provided with an intake port fuel injection system, wherein said method is characterized in that in order to achieve the efficient lean mixture combustion process, an HHO oxy-hydric gas direct injection should be at a minimum pressure of 10 bar, during compression stroke, after intake valve closing, so that the hydrogen/fuel mixture volumetric fractions value is within the range of about 15% to 25%.

Abstract: Method to provide fugitive gases to an engine. A source of fugitive gases is directed to the air intake of the engine. A fugitive gas pipe supplies the fugitive gases to the air intake and a vent allows the fugitive gases to vent to atmosphere. A check valve in the vent inhibits the flow of fugitive gases to the vent and allows the escape of the fugitive gases to the vent if the pressure of the fugitive gases exceeds a predetermined value.

Abstract: A gas phase of LPG such as propane is used to power a small internal combustion engine driving or powering a preselected device such as a powered lawnmower, weed whacker, string trimmer, leaf blower or the like and the fuel system is provided with heating arrangements that insure the gas phase of the LPG is discharged from the LPG tank for all operating conditions of the device.

Abstract: The multi stage hydrogen compression and delivery system for internal combustion engines utilizing an air cooling system and an electrical heater (HCDS-ICAir-Multi) consists of a thermally driven multi compression stage metal hydride hydrogen compressor in line with high pressure hydrogen storage tanks and a pressure regulating hydrogen delivery system that supplies a controlled release of hydrogen to the internal combustion engine. The air cooling absorbs the excess energy produced upon hydrogen absorption and the electric heater supplies the thermal energy needed to drive the hydrogen compression within the compression stage of the system. The compressor is intended to be inseparable from the storage tank to ensure safe operation.

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: The invention relates to a method for determining the ignitability of fuel, particularly of diesel, biodiesel, gas-to-liquid or biomass-to-liquid fuel, with an unknown fuel quality for an internal combustion engine. Provision is made for the density of the fuel to be ascertained and for the ignitability to be derived from this.

Abstract: A gas supply module is described for supplying a combustion chamber of an internal combustion engine with gas, in particular with air, including a gas supply element for supplying gas to the combustion chamber and a closure element which is situated in the gas supply element on the outlet side, the gas supply element being closable in a gas-tight manner on its outlet side with the aid of closure element.

Abstract: An improved mixing tube design and fuel nozzle that allows for a more uniform and thorough mixing of fuel and air being fed to the combustor of a gas turbine engine, wherein each of a plurality of mixing tubes comprises a pair of concentric hollow cylinders that define a ring-like, annular path for the flow of fuel between the two hollow cylinders in each mixing tube, a plurality of air injection slots formed in the concentric hollow cylinders defining corresponding air flow paths from the outside into the interior of each mixing tube, and one or more fuel injection ports formed in selected ones of the plurality of air injection slots that allow for the flow of fuel from the annular path formed by the hollow cylinders into the air flow path, resulting in significantly better mixing and improved thermodynamic behavior of the fuel and air mixture downstream of the nozzle and upstream of the combustor.

Abstract: The seal assembly comprises providing a fuel conduit having a fluid flow passage therethrough for conveyance of a pressurized fuel-containing gas in a general fluid-flow direction with a first sealing surface disposed on the fuel conduit. A second sealing surface engages with the first sealing surface, such as to provide a fluid-tight connection preventing pressurized gas from leaving the fluid flow passage. The said first and second sealing surfaces are substantially perpendicular to the general fluid-flow direction. An o-ring is disposed between the first sealing surface and second sealing surface, the o-ring being compressed by the first and second sealing surfaces to form said fluid-tight connection. Preferably the o-ring is subjected to a squeeze of at least 40%, more preferably 50%, when the first and second sealing surfaces are coupled together. The sealing arrangement is most advantageously applied to throttle assemblies and the like, in particular for use with low-speed, gaseous fueled engines.

Abstract: The method comprises receiving from the vehicle controller, values associated with the engine speed and of another parameter indicative of the engine operating conditions, such as the total fuelling amount, and controlling the fuel injection parameters according to the engine state, which, for example, can include a normal operation mode, a filter regeneration mode, an engine protection mode, high or low transient load modes, and operating at different altitudes, through algorithms implemented in an electronic controller.

Abstract: A gaseous carburetor or fuel control system includes a fuel metering assembly, a venturi mixer assembly, a throttle assembly, and an electronic control unit. The control unit controls the fuel metering assembly in a closed loop manner based on detected gas and air pressure to an air/fuel mixing venturi. An electronic governor which controls the throttle valve may also be controlled by the same control unit which controls the fuel metering assembly, using a separate control loop.

Abstract: An engine assembly may include an engine structure, an intake manifold, and a liquefied petroleum gas (LPG) fuel assembly. The engine structure may define a combustion chamber and the intake manifold may be in communication with the combustion chamber. The LPG fuel assembly may include a LPG fuel tank containing LPG fuel, a liquid LPG fuel injection system in communication with the LPG fuel tank and the combustion chamber, and a vapor LPG fuel injection system in communication with the LPG fuel tank and the intake manifold.

Abstract: A method and system in accordance with the present invention provides for improved lambda control utility that includes the following: the introduction of an inner control loop to the lambda control based on the pressure of the gaseous fuel downstream of the fuel control valve and upstream of the carburetor relative to the pressure of the air at the inlet of the carburetor, and the introduction of operating point based dynamic parameter scheduling in the lambda feedback control loop. The combination of these enhancements, working together, will allow an engine system to consistently meet the mandated performance requirements via tighter lambda control in the presence of set point changes and load disturbances.

Abstract: A method and system for fuel delivery. The method and system may include one or more fuel storage tanks housing propane, one or more regulators through which fuel may flow and one or more fuel metering devices or systems. The flow of fuel from a fuel storage tank to an engine may be such that the engine runs in a clean and efficient manner.

Abstract: A carburetor for a gas powered internal combustion engine having a plurality of pressure reducing stages for reducing the pressure of the gas phase in a liquified petroleum gas storage bottle prior to the mixing of the gas phase of the liquified petroleum gas with ambient air.

Abstract: A gaseous fuel mixing device includes a body having an air/fuel passageway and a gaseous fuel passageway in fluid communication with the air/fuel passageway, a throttle valve pivotably coupled to the body and positioned in the air/fuel passageway, and an intake unit coupled to the body. The intake unit includes an inlet configured to be fluidly connected with a source of gaseous fuel, a first jet fluidly communicating the inlet and the gaseous fuel passageway, a second jet selectively fluidly communicating the inlet and the gaseous fuel passageway, and a selector valve operable to control a flow of gaseous fuel through the second jet.

Abstract: The present disclosure generally relates to an engine with an integrated mixing of fluids device and associated technology for improvement of the efficiency of the engine, and more specifically to an engine equipped with a fuel mixing device for improvement of the overall properties by inline oxygenation of the liquid, a change in property of the liquid such as cooling form improved combustion, or the use of re-circulation of exhaust from the engine to further improve engine efficiency and reduce unwanted emissions.

Abstract: A gas phase of LPG such as propane is used to power a small internal combustion engine driving or powering a preselected device such as a powered lawnmower, weed whacker, string trimmer, leaf blower or the like and the fuel system is provided with heating arrangements that insure the gas phase of the LPG is discharged from the LPG tank for all operating conditions of the device.