4654results about "Fuel supply apparatus" patented technology

The invention discloses a gas mixing control device for an LPG (Liquefied Petroleum Gas) generator set, which relates to the technical field of generator set operation control, and comprises a gas engine for realizing accurate mixing proportion control under the matching of a proportion dynamic response component, predicting the optimal gas mixing proportion and flow demand under the current working condition, and controlling the gas engine to operate according to the optimal gas mixing proportion and flow demand. When the propane content in the LPG is increased, the model prediction controller properly reduces the gas inflow and increases the air amount, sufficient combustion is ensured, the mixing proportion and flow can be rapidly corrected, the combustion process is rapidly recovered to be stable, it is ensured that the gas engine stably operates under different loads, the whole device forms flow balance and stable operation, and the service life of the gas engine is prolonged. Under different gas sources and LPG component differences, effective components actually participating in combustion are accurately judged, so that the needed gas and air amount is accurately calculated, accurate mixing proportion control is achieved, and meanwhile accurate control over the mixed gas mixing process is achieved under the cooperation of an adjusting control assembly.

The invention discloses a thermal field coupling dynamically-adjustable ammonia cracker and a control method, the thermal field coupling dynamically-adjustable ammonia cracker comprises an ammonia preheating device and an ammonia cracking reaction device, the ammonia preheating device comprises a combustion preheating chamber and a controllable pure ammonia burner, the combustion preheating chamber comprises a combustion cavity and an ammonia preheating cavity, the ammonia preheating cavity surrounds the periphery of the combustion cavity, and the controllable pure ammonia burner is arranged in the combustion cavity. The controllable pure ammonia burner comprises an ammonia fuel spray head and an air rotational flow assembly, the air rotational flow assembly comprises a plurality of rotational flow fan blades, the distances between the rotational flow fan blades in the circumferential direction are adjustable, the ammonia cracking reaction device comprises a tail gas inlet pipe, a mixed gas heat exchange cavity and an ammonia cracking reaction pipe, and the ammonia cracking reaction pipe is arranged in the mixed gas heat exchange cavity; an inlet of the mixed gas heat exchange cavity is communicated with the tail gas inlet pipe and the combustion cavity at the same time, the ammonia cracking reaction pipe is communicated with the ammonia preheating cavity, and an ammonia cracking catalyst is arranged in the ammonia cracking reaction pipe. The requirements for the high ammonia cracking rate and the high energy utilization efficiency are met, and meanwhile the hydrogen production amount can be dynamically adjusted according to the hydrogen requirement amount of the ammonia internal combustion engine.

The invention discloses a tail gas self-treatment low-emission zero-carbon ammonia hydrogen engine system and a control method, and the tail gas self-treatment low-emission zero-carbon ammonia hydrogen engine system comprises a pure ammonia flameless combustion ammonia decomposition system, a NOx decomposition system, an ammonia hydrogen engine, an air source and an ammonia gas source. The NOx decomposition system utilizes a thermal decomposition technology of nitrogen oxide to realize the reutilization of waste heat of combustion tail gas of the pure ammonia hedging type flameless combustion furnace and decompose the nitrogen oxide in the engine tail gas into nitric oxide, and the ammonia-hydrogen engine utilizes the combustion of the engine to do work, so that the tail gas of the pure ammonia hedging type flameless combustion furnace can be recycled, and the nitrogen oxide in the tail gas of the pure ammonia hedging type flameless combustion furnace can be recycled. Heat utilization of ammonia gas is achieved, and combustion-supporting tail gas needed by the pure ammonia opposite-flushing type flameless combustion furnace is generated.

The ammonia storage tank includes a fuel supply unit that supplies ammonia discharged from an ammonia storage tank to an engine, a fuel recovery unit that recovers excess ammonia returned from the engine, an exhaust treatment unit that treats exhaust gas discharged from the engine, and a vent unit that discharges ammonia discharged from the fuel supply unit or the fuel recovery unit to the outside, the vent unit includes a low-pressure discharge drum that collects low-pressure ammonia discharged from the ammonia storage tank or the fuel supply unit, a high-pressure discharge drum that collects high-pressure ammonia discharged from the fuel supply unit or the fuel recovery unit, and an exhaust treatment machine that treats ammonia and transfers it to a vent mast, and the low-pressure discharge drum or the high-pressure discharge drum transfers ammonia to the exhaust treatment unit or the exhaust treatment machine.

A controller is configured to control an internal combustion engine. The controller is configured to perform a fuel pressure control of adjusting a fuel pressure downstream of an electromagnetic valve in a flow direction of fuel in a fuel passage to a prescribed pressure lower than a fuel pressure upstream of the electromagnetic valve by repeatedly performing opening and closing operations of the electromagnetic valve. The controller includes processing circuitry. The processing circuitry is configured to execute a process of setting opening and closing time points of the electromagnetic valve such that a valve opening period of the electromagnetic valve during execution of the fuel pressure control overlaps with a valve opening period of the fuel injection valve.

This fuel property determination device determines components of liquefied natural gas stored in a tank as a fuel for an engine. The fuel property determination device has: an estimation unit that estimates the methane number of the liquefied natural gas using a first estimation method when the engine is being driven, and estimates the methane number of the liquefied natural gas using a second estimation method different from the first estimation method when the engine is to be restarted from a stopped state; and a control unit that controls a notification device so as to provide a notification indicating that a property change has occurred in the liquefied natural gas, if the methane number of the liquefied natural gas estimated by the first or second estimation method is less than a threshold.

Disclosed herein is a gas purging system for ships having an engine fueled by fuel gas. The gas purging system includes: a fuel supply line along which fuel gas is supplied to the engine; a gas valve unit disposed on the fuel supply line to control a pressure of the fuel gas; and a purge line along which nitrogen gas is supplied to the engine to purge an interior of the engine and an interior of the fuel supply line, wherein the nitrogen gas is directly supplied to the engine along the purge line, purges the interior of the engine and the fuel supply line, and is discharged to outside atmosphere through the gas valve unit.

A fuel reforming system for a vehicle on which a reciprocating engine is mounted is provided can comprise a decomposer to decompose hydrocarbon fuel into carbon and hydrogen gas by using heat and a pressure of combustion gas and a catalyst and to hold carbon. The decomposer can communicate with a combustion chamber via an openable / closable third port. A reforming space in which a reforming member including the catalyst is installed can be on the side of a connection portion of the decomposer with the third port. On an opposite side of interior of the connection portion of the decomposer with the third port, an additional space is provided to accommodate residual gas that remains in the third port and the decomposer when combustion gas is introduced into the decomposer through the third port.

A system includes a controller communicably coupled to a hydrogen fueled internal combustion engine. The controller includes at least one processor coupled to at least one memory device storing instructions that, when executed by the at least one processor, cause the controller to perform operations. The operations include receiving an engine shutdown request and responsive to receiving the engine shutdown request, executing an engine shutdown procedure including causing the engine to continue to rotate for at least a predetermined number of rotations or at least a predetermined time period.

A compressed gas supply system comprises at least one tank (2) for highly compressed gas, a tank-side shut-off device (4), and a first sensor group comprising a first pressure sensor (10) and a first temperature sensor (11). The pressure sensor (10) and the temperature sensor (11) are arranged on a line (3, 8) extending from a side of the tank-side shut-off device (4) facing away from the tank (2) to a consumer-side shut-off device (7, 16).

The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine along with ammonia. The present invention utilizes ammonia not only as a co-fuel for the engine, but also as a heat-exchange medium used by a cooling system for the internal combustion engine, such that the heat is transferred from hot engine coolant to the ammonia, thereby cooling the engine coolant, and also pre-heating the ammonia.

A method of combusting hydrogen gas in an engine cylinder to initiate a diffusion combustion process, the engine cylinder having a cylinder piston which is driven by means of a crankshaft between bottom dead centre (BDC) and top dead centre (TDC) to perform a compression stroke. The method comprises delivering a pilot injection of hydrogen gas into a combustion chamber during the compression stroke so that the pilot injection of hydrogen pre-mixes with the air and forms an ignitable air / hydrogen gas mixture in the vicinity of an engine cylinder spark plug; generating a spark with a spark plug to ignite the ignitable air / hydrogen gas mixture to generate a primary combustion event which results in a fuel burn and a cloud of primary gas; and delivering a main injection of hydrogen gas directly into the burning cloud of primary gas so that the main injection of hydrogen gas ignites in the compression stroke to deliver a secondary combustion event.

An internal combustion engine system includes: an internal combustion engine; at least one fuel tank that stores a fuel gas in a compressed state; a fuel gas pipe that connects the fuel tank to the internal combustion engine; and a pressurizing pump that is connected to the fuel gas pipe and pressurizes the fuel gas in the fuel tank or in the fuel gas pipe.

The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine. The present invention utilizes an electric catalyst unit operating in series with a heat exchange catalyst unit. The electric catalyst unit is used to initiate an ammonia cracking process on-board during a cold start or low load operating condition of the internal combustion engine, where the ammonia cracking process occurs in the heat exchange catalyst unit once exhaust gas from the internal combustion engine has been heated to a threshold temperature suitable to perform the ammonia cracking process.

A nozzle (2) for supplying hydrogen to a combustion chamber of an internal combustion engine has a housing (3) and a nozzle needle (5) which is movable therein, comprising a shaft (6) and a valve plate (7) adjoining it, which widens towards the nozzle opening, so that an annular flow channel (4) widening in the direction of the hydrogen flow is formed between the nozzle needle (5) and an inner wall (10) of the housing (3), which extends from a channel inlet (8) at the transition between the shaft (6) and the valve plate (7) of the nozzle needle (5) to the channel outlet (9) at the end of the nozzle needle (5), wherein the opening area of ​​the channel inlet (8) is variable by the movableness of the nozzle needle (5), whereas the channel outlet (8) located at the end of the nozzle needle (5) has a constant cross-sectional area throughout the entire adjustment range of the nozzle needle (5).

The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine. The present invention utilizes an electric catalyst unit operating in series with a plate-type heat exchange catalyst unit. The electric catalyst unit is used to initiate an ammonia cracking process on-board during a cold start or low load operating condition of the internal combustion engine, where the ammonia cracking process occurs in the heat exchange catalyst unit once exhaust gas from the internal combustion engine has been heated to a threshold temperature suitable to perform the ammonia cracking process.

The utility model provides a fuel gas pressure reducing valve with a pilot-operated type fuel gas cut-off valve, which comprises a valve seat, a valve cover and a piston assembly, a gas inlet and a gas outlet are arranged on the valve seat, and the cut-off valve assembly is arranged on a gas inlet channel communicated between the gas inlet and the piston assembly and used for controlling on-off of gas flow in the pressure reducing valve. A three-way electromagnetic valve assembly is arranged in the valve seat on one side of the stop valve assembly, the three-way electromagnetic valve assembly is provided with an air inlet hole, a second air outlet hole and a third air outlet hole, and high-pressure air entering from the air inlet connector is communicated to the air inlet hole of the three-way electromagnetic valve assembly through a first process hole formed in the valve seat; the third air outlet hole is communicated with the back face of the stop valve assembly through a second process hole formed in the valve seat, and the second air outlet hole is communicated with the air outlet through a third process hole formed in the valve seat. Through the design of the independent three-way electromagnetic valve, a valve element switch is controlled by adopting very small electromagnetic force, so that the airflow direction is controlled, and switch control over the high-pressure main loop stop valve assembly is achieved.

The invention discloses a high-pressure main engine LNG fuel supply system, and relates to the technical field of LNG fuel high-pressure main engines, the high-pressure main engine LNG fuel supply system comprises a pressurization unit, an evaporation unit and a conveying unit, a fuel inlet of a high-pressure evaporator of the evaporation unit is connected with a high-pressure liquid supply pipe, and a fuel gas outlet of the high-pressure evaporator is connected with a high-pressure gas outlet pipe; a heating medium inlet of the high-pressure evaporator is connected with a steam pipeline, a heating medium outlet of the high-pressure evaporator is connected with a condensate water pipeline, and the condensate water pipeline is emptied. The steam pipeline is connected with the heating medium inlet of the high-pressure evaporator, and the heating medium outlet of the high-pressure evaporator is connected with the condensate water pipeline, so that steam is directly introduced into the high-pressure evaporator, a steam direct heating mode is adopted, a middle heating medium circulating pipeline is omitted, and the system efficiency is improved; and the condensate water is discharged in an open mode, the safety of the system can be guaranteed essentially, leaked gas cannot be brought back to a safety area, and therefore the reliability of the ship is improved.

A fuel pressure controller includes processing circuitry that executes a first process, a second process, and a third process as a fuel pressure reduction control. The first process includes closing both a first electromagnetic valve and a second electromagnetic valve. The second process includes adjusting the pressure of the fuel supplied to a fuel injection valve by repeatedly performing an opening and closing operation of the second electromagnetic valve. The third process includes, when the fuel pressure in a fuel pipe between the first electromagnetic valve and the second electromagnetic valve reaches a prescribed pressure, stopping the opening and closing operation of the second electromagnetic valve to maintain the second electromagnetic valve in an open state, and repeatedly performing the opening and closing operation of the first electromagnetic valve to adjust the pressure of the fuel supplied to the fuel injection valve.

The mobile hydrogen energy power generation system comprises a hydrogen engine, the output end of the hydrogen engine is connected with the input end of a power generator, and the power generator is electrically connected with a battery pack; a hydrogen inlet of the hydrogen engine is connected with a hydrogen outlet of the buffer tank through a first hydrogen supply pipe set, a hydrogen inlet of the buffer tank is connected with a hydrogen source through a second hydrogen supply pipe set, a third hydrogen supply pipe set is installed on the second hydrogen supply pipe set in a matched mode, and the end of the third hydrogen supply pipe set is connected with a gas port of the solid hydrogen storage module. The solid hydrogen storage module is filled with solid hydrogen storage materials, a fourth hydrogen supply pipe set is installed on the third hydrogen supply pipe set in a matched mode, and the end of the fourth hydrogen supply pipe set is connected with the other hydrogen inlet of the buffer tank. By arranging the solid hydrogen storage module, hydrogen can be stably supplied to the hydrogen engine, so that the generator can stably output electric energy, and the system is suitable for equipment or systems with high requirements for electric energy quality, good in safety and stability, low in overall energy consumption and low in power generation cost.

A controller and a control method for an internal combustion engine are provided. The internal combustion engine uses hydrogen as fuel. A base value of a fuel injection amount is calculated based on a requested torque. A smaller one of an upper limit value of the fuel injection amount and the base value is set as a target value. The upper limit value corresponds to an engine load factor. A NOx concentration difference is a difference between a NOx concentration in exhaust gas and a reference value for the NOx concentration. When the NOx concentration difference is greater than or equal to a threshold value, a relationship between the engine load factor and the upper limit value is corrected such that the upper limit value decreases.

The invention discloses a gas fuel compression control system, method, device and equipment and a storage medium. The gas fuel compression control system comprises an oil supply control valve, a sensor unit and a controller, and the signal output end of the sensor unit is connected with the signal input end of the controller; the oil supply control valve is used for controlling the on-off of an oil path of the final-stage compression cylinder according to a control instruction output by the controller; the sensor unit is used for collecting working state signals of the compression system in real time. And the controller is used for outputting a corresponding control instruction according to the working state signal so as to control the opening and closing state of the oil supply control valve based on the control instruction, so that the final-stage compression cylinder is put into compression work or quits compression work. The compression efficiency of the gas fuel compression system with the fixed displacement can be effectively improved.

The invention relates to the technical field of ship engine tail gas treatment, and discloses a denitration system and a denitration method for ammonia fuel engine tail gas. The denitration system comprises an ammonia fuel engine and a denitration device, the liquid ammonia fuel supply device is connected with the ammonia fuel engine through a supply pipeline and is used for supplying ammonia fuel to the ammonia fuel engine; a gas inlet of the ammonia gas buffer tank is connected with the supply pipeline, and the ammonia gas buffer tank is used for collecting unburned ammonia gas generated in the supply pipeline; the ammonia water preparation device is connected with a gas outlet of the ammonia gas buffer tank; and the tail gas denitration device is connected with an outlet of the ammonia water preparation device and an exhaust port of the ammonia fuel engine. The ammonia water is prepared from the unburned ammonia gas, and the prepared ammonia water is used for subsequent reduction of nitrogen oxides in tail gas of an ammonia fuel engine, so that the treatment problem of the unburned ammonia gas can be solved, and meanwhile, the consumption of a reducing agent is reduced. In addition, the ammonia water can replace part of the reducing agent, so that the storage amount of the reducing agent can be reduced, and the ship space occupied by the reducing agent is reduced.

The present invention relates to a device for direct injection of a gaseous fuel, in particular hydrogen, which device comprises: a pressure-control unit which is designed to convert a supplied variable pressure level of the gaseous fuel into a fixed constant output pressure level; a distributor unit which is connected to at least one injector for direct injection of the gaseous fuel, which has been guided through the pressure-control unit, into a combustion chamber; and a fluid connection between the pressure-control unit and the distributor unit in order to guide the gaseous fuel at a constant output pressure downstream towards the distributor unit. The device is characterized in that a flow-control valve is disposed along the fluid connection and designed to adjust the constant output pressure level of the gaseous fuel to a desired target pressure not exceeding the output pressure level.

The present invention relates to a valve set for conducting and conditioning a gaseous fuel, in particular hydrogen, comprising: an inlet for receiving a pressurised gaseous fuel from a fuel store; an outlet for conveying a pressurised gaseous fuel to a fuel injector; a shut-off valve, which is fluidically connected to the inlet and is used for selectively blocking or allowing the conveying of the gaseous fuel flowing in from the inlet to the outlet; a gas metering valve, which is fluidically connected in series with the shut-off valve and is used for regulating (preferably with regard to pressure and amount) a flow of the gaseous fuel flowing in via the inlet and guiding it to the outlet; and a bleed valve, which is used, in an open state, to reduce the pressure prevailing at the outlet to a predetermined level, in particular to depressurise the outlet, wherein the shut-off valve, in a de-energised state, is closed and blocks a fluid line, and the bleed valve is open in a de-energised state. Preferably, the gas metering valve may be closed in a de-energised state.

The invention relates to a supply assembly (1) for a gaseous-fuel engine (70). In order to provide effective means for precise lubrication of a fuel injector for a gaseous-fuel engine, the invention provides that the supply assembly (1) comprises: - a fuel-supply system (10) comprising a fuel rail (12) for conveying a gaseous fuel and a plurality of injector units (13), each injector unit (13) comprising a fuel injector (20) that is at least indirectly connected to the fuel rail (12) and is adapted to inject fuel into the engine (70), and - a lubricant-supply system (30) comprising at least one lubricant doser (31) with an outlet port (38), the lubricant doser (31) being adapted to controllably release a liquid lubricant (L) through the outlet port (38) into an injector unit (13), and being mounted to the injector unit (13).

The invention relates to a gas injector for blowing in a gaseous medium, in particular hydrogen, comprising: a closing element (2) which releases and closes a through-opening (3) on a sealing seat (4) of a valve body (6), the closing element (2) comprising a valve needle (20) and a valve disk (21); an actuator (5) for actuating the closing element (2); a plurality of cooling ribs (7; 71; 72) which are arranged downstream of the sealing seat (4) in the flow direction of the gas injector.

A system includes: a hydrogen internal combustion engine configured to produce exhaust; an aftertreatment system in exhaust receiving communication with the hydrogen internal combustion engine, the aftertreatment system comprising a catalyst member; a sensor coupled to the aftertreatment system; and a controller configured to: receive, from the sensor, data corresponding to a characteristic of the aftertreatment system, determine, based on the characteristic, a performance value corresponding to the catalyst member, compare the performance value to a threshold, cause the hydrogen internal combustion engine to operate in a first engine operating mode when the performance value does not exceed the threshold, and cause the hydrogen internal combustion engine to operate in a second engine operating mode when the performance value exceeds the threshold.

To early activate a catalyst of a three-way catalyst device for purifying exhaust gas of an internal combustion engine, in a power device including the internal combustion engine using ammonia and ignition fuel as fuel.SOLUTION: A power plant 10 comprises a turbocharger 26 that turbocharges intake air of an internal combustion engine 12 to increase an intake pressure, and a throttle valve 24 that narrows a flow path of an intake pipe 22. When a catalyst in a three-way catalytic device 44 is inactive, a wastegate valve 50 of the turbocharger 26 is opened, or in addition, an intake flow path is narrowed by the throttle valve 24, to lower the intake pressure compared to that in normal time. The lowering of the intake pressure reduces a heat capacity of materials in a cylinder, increases a combustion temperature, and increases an exhaust temperature. High-temperature exhaust gas increases a temperature of the catalyst early, to accelerate activation.SELECTED DRAWING: Figure 1

A gas supply system for a high-pressure gas consuming appliance and a low-pressure gas consuming appliance of a floating structure including a tank containing the gas is disclosed. The supply system includes: a first supply circuit and a second supply circuit; a gas return line; and a first heat exchanger and a second heat exchanger configured to carry out a heat exchange between the gas of the first supply circuit and the gas circulating in the return line. The first supply circuit includes an additional pump.