4575results about "Fuel supply apparatus" patented technology

In an internal combustion engine that can burn two fuels, the main fuel may become unavailable, either temporarily or until the main fuel is replenished. The present apparatus determines when to fuel an engine with main fuel and secondary fuel, or secondary fuel alone. The apparatus includes a main-fuel supply system comprising a main-fuel injection valve that introduces main fuel into an engine combustion chamber; a secondary-fuel injection system comprising a secondary-fuel injection valve that introduces secondary fuel directly into the combustion chamber; a pressure sensor associated with the main-fuel supply system for determining injection pressure inside the main-fuel injection valve; and an electronic controller in communication with the pressure sensor and programmable to separately command actuation of the secondary-fuel and the main-fuel injection valve when injection pressure is greater than a predetermined threshold, and to otherwise command actuation of the secondary-fuel injection valve and not the main-fuel injection valve.

An internal combustion engine, in which multiple kinds of fuels are fed to a cylinder from multiple fuel injectors each corresponding to each of multiple kinds of fuels at a target mixing ratio determined according to a running condition, includes an actual fuel mixing ratio calculator calculating an actual fuel mixing ratio of fuel fed to cylinder. The actual fuel mixing ratio calculator at first calculates actual fuel injection quantity of each fuel injection by adding or subtracting predetermined stuck-on-wall fuel to or from each quantity of fuel injected from each fuel injector, and then calculates an actual fuel mixing ratio of fuel fed to cylinder on the basis of the calculated actual fuel injection quantity of each fuel injector.

A system for safe storage and efficient utilization of a variety of fuel selections that range in composition and phase from cryogenic mixtures of solids and liquids to elevated temperature gases is provided for unique applications with various types of heat engines and fuel cells including hybridized combinations.

A hydraulically actuated dual fuel injector for an internal combustion engine. More particularly, the application pertains to a hydraulically actuated injector for injecting controlled quantities of a first fuel and of a second fuel into an internal combustion diesel engine at different times. A dual fuel injector comprising: (a) an injector body; (b) an inlet port in the injector body for enabling pressurized hydraulic fluid from a hydraulic fluid source to be introduced into the interior of the injector body, the hydraulic fluid being of sufficient pressure to maintain injection valves in the injector body in a closed position until actuated; (c) a first inlet port in the injector body for enabling a first fuel to be introduced into the interior of the injector body; (d) a first injection valve in the injector body connected to the second inlet port for controlling injection of the first fuel from the injector through a first fuel ejection port; (e) a second inlet port in the injector body for enabling a second fuel to be introduced into the interior of the injector body; (f) a second injection valve in the injector body connected to the second inlet port for controlling injection of the second fuel from the injector through a second fuel ejection port; (g) a first control valve which causes the hydraulic fluid to actuate the first injection valve; (h) a second control valve which causes the hydraulic fluid to actuate the second injection valve; (i) a metering device in the injector body for metering the amount of first fuel injected by the first injection valve; and (j) a seal in the injector body which prevents leakage of the second fuel into the first fuel.

A remedial pollution control system for treating volatile organic compounds that may include a vapor concentrator connected to a line that is laden with volatile organic compounds, the concentrator has an organic condensate output line and a vapor output line; a mixing chamber adapted to receive air provided from an air supply line, combustible fuel from an alternate fuel supply line, and a vapor stream from the vapor output line to produce a mixed fuel supplied to an internal combustion engine, a control mixing system with a controller for producing a proper air to fuel ratio in the mixed fuel supply, and power generated to operate other devices used to more efficiently abate volatile organic compounds and reduce greenhouse gas emissions.

Systems, methods and apparatus' of converting an engine into a multi-fuel engine are provided. One embodiment reduces particulate emissions and reduces the amount of combusted gasoline or diesel fuel by replacing some of the fuel with a second fuel, such as natural gas, propane, or hydrogen. One feature of the present invention includes a control unit for metering the second fuel. Another feature of the present invention includes an indicator that indicates how much second fuel is being combusted relative to the diesel or gasoline. 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.

Semiconductor devices include an active region defined in a semiconductor substrate having first type impurity ions. A retrograde region is in the active region and has second type impurity ions. An upper channel region is on the retrograde region in the active region and has the first type impurity ions. Source and drain regions are on the upper channel region in the active region and spaced apart from each other. A gate electrode fills a gate trench formed in the active region. The gate electrode is disposed between the source and drain regions and extends into the retrograde region through the upper channel region. DRAM devices and methods are also provided.

An apparatus for delivering two fuels to a direct injection internal combustion engine comprises a liquid-fuel supply rail, a gaseous-fuel supply rail, a drain system with a shared drain rail for collecting both liquid fuel and gaseous fuel, and a venting device for venting gaseous fuel collected by the drain rail. The method comprises separately delivering a liquid fuel at injection pressure to an injection valve through a liquid-fuel rail, and actuating the liquid-fuel injection valve to introduce liquid fuel directly into the combustion chamber. The method further comprises delivering a gaseous fuel at injection pressure to an injection valve through a gaseous-fuel rail and actuating the gaseous-fuel injection valve to introduce gaseous fuel directly into the combustion chamber. The method further comprises collecting in a drain rail liquid fuel and gaseous fuel from the liquid-fuel injection valve and the gaseous-fuel injection valve, directing liquid fuel to a storage vessel, and directing gaseous fuel to a vent pipe.

An apparatus for delivering two fuels to a direct injection internal combustion engine comprises a liquid-fuel supply rail, a gaseous-fuel supply rail, a drain system with a shared drain rail for collecting both liquid fuel and gaseous fuel, and a venting device for venting gaseous fuel collected by the drain rail. The method comprises separately delivering a liquid fuel at injection pressure to an injection valve through a liquid-fuel rail, and actuating the liquid-fuel injection valve to introduce liquid fuel directly into the combustion chamber. The method further comprises delivering a gaseous fuel at injection pressure to an injection valve through a gaseous-fuel rail and actuating the gaseous-fuel injection valve to introduce gaseous fuel directly into the combustion chamber. The method further comprises collecting in a drain rail liquid fuel and gaseous fuel from the liquid-fuel injection valve and the gaseous-fuel injection valve, directing liquid fuel to a storage vessel, and directing gaseous fuel to a vent pipe.

An EGR equipped internal combustion engine is controlled to maximize the beneficial effects and minimize the detrimental effects of EGR on engine operation. Specifically, at least one parameter indicative of the O2 concentration in the intake mixture and / or at least one parameter indicative of the H2O concentration in the intake mixture is monitored, and the monitored parameter is relied on to control one or more aspects of engine operation by open loop adjustment of other control strategies and / or by a separate closed loop control strategy. These controls are applicable to virtually any engine, and are particularly beneficial to lean burn engines such as diesel (compression ignition) engines, spark ignited natural gas engines, and dual fuel or other compression ignited natural gas engines. The engine may be equipped with either actively controllable EGR or passive and uncontrolled EGR.

The invention discloses a dual-fuel modified system. A natural gas supply system comprises a natural gas main pipeline, a mixer, a sensor set and a control system. The control system is in communication connection with the sensor set and an electromagnetic switch valve in the natural gas main pipeline. The dual-fuel modified system is started under the mode of diesel oil. When operation signals transmitted by the sensor set are within a preset range, the control system controls the electromagnetic switch valve to be opened, and when the operation signals transmitted by the sensor set are beyond the preset range, the control system controls the electromagnetic switch valve to be closed. According to the dual-fuel modified system, the natural gas main pipeline, the mixer, the sensor set and the control system are arranged on the basis of an original diesel engine, the original diesel engine and an ECU of the original diesel engine are not modified largely, the modifying process is simple, the modifying cost is low, and therefore the feasibility for modifying the large-scale diesel engine to the dual-fuel modified system is improved.

A fuel system for on-board vehicle fuel separation to supply engine fuel compositions formulated as a function of driving cycle conditions. The invention results in improvements in one or more of feed efficiency and combustion emissions.

A method for generating power comprising the steps of feeding water into an electrolyzer, providing electricity to operate the electrolyzer to split at least some of the water into hydrogen and oxygen, and decompressing one or both of the hydrogen and oxygen to generate power. Water can be pressurized prior to being fed into the electrolyzer. The hydrogen and oxygen, which can be stored in insulated storage vessels, can be decompressed isentropically to yield energy, which can be used to power a generator. Heat can be extracted from the hydrogen and oxygen, such as through heat exchangers. Hydrogen and oxygen can combine in an internal combustion process to produce work and heat, which can be recycled into the thermodynamic process.

A fuel-conditioning skid for an engine. The fuel-conditioning skid includes an inlet that is connectable to a source to receive a flow of fuel containing undesirable compounds. An outlet is connectable to the engine to deliver a flow of fuel that is substantially free of undesirable compounds. An inlet cleaner is in fluid communication with the inlet and is operable to remove a portion of the undesirable compounds. A compressor is in fluid communication with the inlet cleaner to receive the flow of fuel at a first pressure and discharge the flow of fuel at a second pressure. The second pressure is greater than the first pressure. A purifier is in fluid communication with the inlet cleaner to receive the flow of fuel. The purifier is operable to remove substantially all of the remaining undesirable compounds from the flow of fuel.

The present invention relates to a system that is capable of freely selecting one or two or more types of fuel and supplying the selected types of fuel to an internal combustion engine. Disclosed is a hydrogen-fueled internal combustion engine that operates upon receipt of one or more types of fuel that are selected from hydrogenated fuel and a dehydrogenated product and hydrogen, which are obtained by dehydrogenating the hydrogenated fuel. The hydrogen-fueled internal combustion engine comprises: a hydrogenated fuel storage section; reaction means for invoking a dehydrogenation reaction; separation means for separating hydrogen-rich gas and dehydrogenated product; and a dehydrogenated product storage section for storing the separated dehydrogenated product.

In an engine system of a machine having a multi fuel engine system, an energy accumulator is provide to accumulate and store energy when the engine system is in a low engine power usage or low engine load state, and to discharge energy from the energy accumulator when the engine system is in a high engine usage or high engine load state. The energy accumulator may be implemented, for example, in the form of a gaseous fuel accumulator that delivers gaseous fuel to the engine, a hydraulic fuel accumulator that provides pressurized fluid to power a fuel pump, or a battery pack that powers an electric hydraulic pump.

A pressure control system comprises separate conduits for supplying liquefied gas and vapor from a cryogen space defined by a cryogenic storage tank. A first conduit can deliver liquefied gas to a use device through a heater and then a first flow controller. A second conduit can deliver vapor to the use device with flow therethrough controlled by a second flow controller. The first flow controller is not exposed to liquefied gas at cryogenic temperatures because it is located downstream from the heater. For automatic operation a pressure sensor measures pressure inside the cryogen space and the first and second flow controllers are independently operable to maintain the pressure inside the cryogen space within a predetermined range. In a preferred embodiment the liquefied gas is a combustible fuel that is consumed by an internal combustion engine, which is the use device.

The invention provides an internal combustion engine which can be run optionally on various fuels of different energy density, in particular for a motor vehicle drive, characterised in that the engine is equipped with a supercharging compressor which can be connected up when using a low-energy-density fuel at least when power requirements are elevated, so that the engine works as a supercharged engine, whereas the supercharging compressor is shut off when using a high-energy-density fuel and the engine works as a naturally aspirating engine.

A fuel delivery system comprising: a fuel source; a first trailer comprising a first manifold in fluid communication with a first fuel train; and a second trailer comprising a second manifold in fluid communication with a second fuel train, wherein the first and second manifolds are connected in series to the fuel source.

An internal combustion engine comprises a fuel injection nozzle for injecting a gaseous fuel directly into the combustion chamber. shield, is installed in close proximity to the fuel injection nozzle, provides a shielded space around a hot surface igniter and restricts flow between the shielded space and the combustion chamber. The nozzle comprises a fuel injection port oriented to direct a fuel spray against a surface of the sleeve An inlet in the sleeve allows air and fuel to enter the shielded space to form a combustible mixture therein. The sleeve contains a substantial amount of the combustible mixture within the shielded space until it ignites and pressure builds within the shielded space to propel a combustion flame through at least one discharge opening and into contact with the fuel sprays emerging from the fuel injection nozzle.

A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and / or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.

A method is described for controlling regeneration of a particulate filter based on at least a sensor, such as a differential pressure sensor. Degradation of the sensor is then detected in a variety of ways. One approach takes advantage of the slowly varying flow resistance of the filter compared with the more rapid variations in flow caused by changing engine conditions. Default operation is then taken when a degraded sensor is detected.

This invention is directed to an apparatus and method for providing improved control of fuel, preferably gaseous fuel, to an internal combustion engine such that each cylinder of the engine will operate within a predetermined tolerance off of its lean misfire limit. The disclosed system introduces fuel to the engine at two locations: (1) upstream of the intake manifold to provide premixing of a majority of the fuel with air, and (2) near the intake valve of each cylinder for tailoring the fuel flow to each cylinder to achieve that fuel-to-air ratio which is necessary to maintain each cylinder at the desired tolerance from the lean misfire limit. Several calibration and control methods are described to maximize performance of the fuel system, including the use of a misfire detection technique to determine the lean misfire limit of each cylinder to allow the respective port fuel injector to provide a specified margin from lean misfire. The present invention enhances engine performance and driveability while reducing exhaust emissions.

A method of operating an electronically controlled dual fuel compression ignition engine includes injecting a pilot ignition quantity of liquid fuel into an engine cylinder from a dual fuel injector in an engine cycle during an auto ignition condition. An amount of gaseous fuel is also injected into the engine cylinder from the dual fuel injector in the same engine cycle. The amount of gaseous fuel is divided between a pre-mix quantity of gaseous fuel, which may be injected about 90° before top dead center, and a post ignition quantity of gaseous fuel that may be injected after top dead center, with both quantities being greater than zero. An engine controller may change a ratio of the pre-mix quantity of gaseous fuel to the post ignition quantity of gaseous fuel responsive to changing from a first engine speed and load to a second engine speed and load. The pilot ignition quantity of liquid fuel is compression ignited, which in turn causes the gaseous fuel to be ignited. A pre-mix quantity of liquid fuel may also be included in order to speed the combustion process at higher engine speeds.

A fuel gas supply system of a ship is provided for supplying fuel gas to a high-pressure gas injection engine of the ship, wherein the ship has an LNG fuel tank for storing LNG as fuel and LNG is extracted from an LNG fuel tank of the ship, compressed at a high pressure, gasified, and then supplied to the high-pressure gas injection engine.