3257results about "Fuel injection apparatus" patented technology

A fuel injector in a fuel system having a first fuel supply of a first fuel and a second fuel supply of a second fuel includes a multifunctional control valve movable in the fuel injector to control admission of the first fuel to a combined-fuel outlet passage, and to control a timing and an injection pressure of a fuel charge containing the first fuel. In an embodiment the first fuel includes a compression-ignition fuel such as diesel and the second fuel includes an alcohol fuel such as methanol. Related apparatus and methodology is disclosed.

A fuel injector is capable of injecting a plurality of different fuels in a single fuel injection event, the fuel injector including: a nozzle at an end of the fuel injector, the nozzle having a tip, openings in the tip of the nozzle through which fuel is configured to be injected, and a check valve member with a tip located within the nozzle, the check valve member being movable between an injection position in which fuel is injected via the openings and a closed position in which the openings are closed. The fuel injector further includes a primary fuel path within the fuel injector, a pilot fuel path within the fuel injector, and a mixing volume connecting the primary fuel path and the pilot fuel path when the check valve member is in the closed position.

The invention discloses a motorcycle emission fuel injector control method, system and equipment and a storage medium, and relates to the technical field of internal combustion engine control. According to the method, the real-time temperature of the fuel injector under the unheated condition is obtained, and the preheating temperature threshold value of the fuel injector is determined based on the difference value between the real-time temperature and the target temperature; acquiring a first temperature change rate of the fuel injector in each preset time period under the condition that the fuel injector is heated by a heat source of the motorcycle according to the preset heat supply amount; the preset heat supply amount is adjusted according to the first temperature change rates, and the target heat supply amount is obtained; a heat source of the motorcycle is controlled to heat a fuel injector according to the target heat supply amount until the real-time temperature reaches the preheating temperature threshold value, and emission parameters of a motorcycle engine are monitored; and the fuel injection amount of the fuel injector is determined based on the emission parameters and the emission parameter standard, and the fuel injector is controlled to inject according to the fuel injection amount. The motorcycle engine has the effect of improving the emission performance of the motorcycle engine.

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.

The invention relates to the technical field of oil nozzles, in particular to an efficient atomization injection system for a direct injection oil injector in a cylinder. According to the technical scheme, an injection execution unit adopts a laser-cladded asymmetric injection hole array, fuel oil is evenly distributed in a combustion chamber through aperture gradient distribution and logarithmic spiral arrangement, and the oil-gas mixing effect is enhanced. The dynamic pressure adjusting unit is integrated with an MEMS film sensor array and a fuzzy neural network controller, a sensor can accurately monitor fuel oil pressure in real time, and the controller is based on a 7-12-3 type BP network and can rapidly and accurately adjust fuel injection pressure according to the working condition of an engine through mass data training. The fuel oil pretreatment unit comprises an ultrasonic cavitation device and a graded heating system, the ultrasonic cavitation device reduces the viscosity of fuel oil, and the graded heating system accurately controls the temperature by means of a PTC heater, a semiconductor laser and a vortex generator. The three units work cooperatively, the fuel oil atomization and combustion efficiency is greatly improved, pollutant emission is reduced, and the engine performance is remarkably improved.

The invention provides a double-curved-surface hole wall rotational flow umbrella oil nozzle for low-carbon fuel and a machining method, and relates to the technical field of gas turbine fuel injection. The nozzle comprises a needle valve, a needle valve seat, a spraying hole and a rotational flow groove; the needle valve and the needle valve seat form a sealing conical surface, the inner wall face of a spraying hole of the curved-surface rotational flow umbrella spraying nozzle is a double curved surface, the double curved surface and the sealing conical surface form a ruled surface, the rotational flow groove is formed in the inner wall face of the spraying hole, and the direction of the rotational flow groove is the generatrix of the ruled surface. The inner wall face of the spraying hole is designed to be the curved face, fuel is better guided to flow in the oil nozzle, the area of a low-pressure area is reduced due to sudden change of the direction in the fuel flowing process, and therefore cavitation is restrained from occurring and developing, and the phenomena that the spraying hole is blocked and mist spraying is unstable due to cavitation are improved; the rotational flow grooves in the curved surface can be achieved through the electric spark machining technology, the machining difficulty is reduced, meanwhile, the turbulent kinetic energy and the radial momentum of fuel can be effectively improved, spray distribution is more uniform, and the atomization quality is improved.

The invention relates to a dual-fuel premixing type ejector. The valve comprises a valve body. The outer needle is movably connected into an inner cavity of the valve body, a pressure chamber is formed between the head of the outer needle and the end of the inner cavity of the valve body, a first fuel spraying hole used for spraying first fuel is formed in the head of the outer needle, and a second fuel spraying hole used for spraying second fuel is formed in the end of the valve body. The first fuel spray hole and the second fuel spray hole extend into the pressure chamber, and the outer needle head can make contact with or be separated from the end of an inner cavity of the valve body so as to open or close the second fuel spray hole. And the inner needle is movably connected to the interior of the inner cavity of the outer needle, and the head of the inner needle can make contact with or be separated from the end of the inner cavity of the outer needle so as to open or close the first fuel spray hole. The temperature of the head of the fuel nozzle can be effectively reduced, formation of carbon deposition of the nozzle hole is inhibited, and the design and process difficulty is reduced.

The utility model relates to an experimental device for low-temperature fuel atomization of an engine in a variable environment. The experimental device comprises a high-pressure common-rail injection system, a low-temperature refrigerating system, an electronic control system, an image data acquisition system and an environment test chamber. The low-temperature refrigerating system reduces the temperature of fuel oil in the oil injector through convective heat exchange; the environment test cabin simulates the environment air pressure, temperature and humidity in the cabin according to the actual environment parameters in the cylinder in the engine operation process; and the high-speed camera shooting technology is used for obtaining spray image information of the low-temperature fuel oil in a variable environment for further comprehensive analysis of fuel oil atomization characteristics. According to the utility model, a reliable experiment means is provided for researching the fuel oil atomization condition of the fuel oil in a low-temperature state in a low-temperature environment in the cold start process of the engine, deeply analyzing the influence of a complex environment on the cold start of the engine, and seeking to improve the cold start performance of the engine.

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 invention discloses a variable environment fuel oil atomization quality test system and test method. The system comprises a high pressure common rail injection system, a low temperature refrigeration system, an electronic control system, an image data acquisition system and an environment test chamber. The low-temperature refrigerating system reduces the temperature of fuel oil in the oil injector through convective heat exchange; the environment test cabin simulates the environment air pressure, temperature and humidity in the cabin according to the actual environment parameters in the cylinder in the engine operation process; the image data acquisition system acquires spray image information of low-temperature fuel oil in a variable environment and performs image processing, and by actually measuring the circulating oil injection quantity during fuel oil injection, the Sott average diameter is calculated according to different empirical formulas, and the fuel oil atomization characteristics are comprehensively analyzed. The invention provides a reliable experimental means for researching the fuel oil atomization condition of the fuel oil in a low-temperature state in a low-temperature environment in the cold start process of the engine, deeply analyzing the influence of a complex environment on the cold start of the engine, and seeking to improve the cold start performance of the engine.

The invention discloses a methanol direct injection injector, comprising: an injector body and a solenoid valve component, an orifice plate, a control valve seat and a needle valve component which are installed below the injector body through a tight cap of the injector body; wherein the solenoid valve component is located above the orifice plate, the orifice plate is located above the control valve seat, and the control valve seat is located above the needle valve component; a first and a second straight hole are arranged on the orifice plate, an inclined hole, a third straight hole and two small holes are arranged on the control valve seat, a needle valve component control chamber is arranged on the upper part of the needle valve component, the lower end of the first straight hole is communicated with the lower end of the second straight hole on the orifice plate and the upper ends of the inclined hole, the third straight hole and the two small holes on the control valve seat, and the lower ends of the inclined hole, the third straight hole and the two small holes on the control valve seat are communicated with the needle valve component control chamber; the opening and closing of the second straight hole on the orifice plate is controlled by turning on and off the power of the solenoid valve component, and then the methanol liquid pressure in the control chamber of the needle valve component is controlled to realize the start of the needle valve component injection.

The common rail oil injector with the static leakage structure comprises an oil injector body, a control valve seat, a control valve matching part, a needle valve assembly and a needle valve body, and is characterized in that a middle hole pressure storage cavity is formed in the oil injector body and used for containing the control valve matching part and the needle valve assembly; the control valve matching part serves as the only static leakage matching part and is composed of a control valve sleeve and a control valve rod in clearance fit with the control valve sleeve, a static oil return channel comprising a first inclined oil return hole, a first vertical oil return hole and an annular groove is constructed in the control valve sleeve, a second oil return through hole in the high-pressure sealing face of the control valve seat is matched, and a specific fuel leakage backflow path is formed. Compared with a traditional 2000 bar common rail oil injector, static leakage matching parts are reduced, the fuel oil leakage amount is greatly reduced, oil consumption is effectively reduced, carbon emission is reduced, meanwhile, the reliability of the oil injector is improved, and the service life of the oil injector is prolonged. The middle hole pressure storage cavity can reduce oil injection pressure fluctuation, and the average effective injection pressure and the multi-time oil injection precision are improved. The oil injector body and the needle valve body are simplified in structure, and machining difficulty and manufacturing cost are reduced.

A fuel injector is provided. The fuel injector is operable to inject fuel at extremely high pressures which creates very small droplet sizes, allowing for efficient self-ignition of the fuel and allows for clean, efficient combustion due to the small droplet sizes. The fuel injector uses pressure from within a combustion chamber to actuate the spraying of fuel from the injector, thereby solving many problems experienced by typical fuel injectors and eliminating many problem-components of prior art fuel injectors.

The invention relates to the technical field of vehicle fuel injectors, in particular to a vehicle fuel injector assembly which comprises an adjusting mechanism, the adjusting mechanism is used for controlling fuel injection, an impurity filter element is installed in the adjusting mechanism, the impurity filter element is used for filtering impurities in the fuel, and the adjusting mechanism is used for adjusting the fuel injection. A mounting part is mounted on the adjusting mechanism in a communicating manner, an electric appliance connector is mounted on the mounting part, and the electric appliance connector is used for controlling the oil sprayer; a transmission mechanism and a cleaning mechanism are mounted on the mounting part, the transmission mechanism is driven by fuel oil penetrating through the impurity filter element, and the transmission mechanism is used for driving the cleaning mechanism to clean impurities left on the impurity filter element; a filter residue collecting device is mounted on the adjusting mechanism, the adjusting mechanism is communicated with the mounting part through the filter residue collecting device, and the filter residue collecting device is used for collecting filtered impurities in the fuel oil. The problems that an existing filtering mechanism is prone to being blocked and complex to maintain are solved.

The invention relates to an independent inner and outer needle valve type flexible fuel injector which comprises an injector shell, internally and externally nested needle valve matching parts, an electromagnetic control valve assembly and a double-row injection hole structure, and a diesel oil high-pressure oil way and a low-carbon fuel high-pressure oil way are arranged in the injector shell; the electromagnetic control valve assembly is arranged in the upper portion of the ejector shell, independently controls diesel oil injection and is of a hydraulic balance valve structure. Needle valve matching parts nested inside and outside are installed at the bottom of the ejector shell and connected with the electromagnetic control valve assembly through a spring guide sleeve, a limiting block and a middle rod. A double-row spray hole structure is arranged at the bottom of the internally and externally nested needle valve matching part; the inerting valve set is connected to the low-carbon fuel high-pressure oil way and used for purging and inerting during fuel switching. By means of the nesting needle valve, the diesel oil lubrication seal, the independent control valve and the inerting design, efficient and stable dual-fuel injection is achieved, the problem of mixing in the prior art is solved, the service life of the injector is prolonged, and the dual-fuel injector is suitable for ship engines with alternative fuel such as methanol / ammonia.

A valve system includes at least one spin chamber having an outlet drain configured to allow flow out of the spin chamber. A main spin surface of the at least one spin chamber is defined around the outlet drain. A directional jet system is in fluid communication with the at least one spin chamber. The directional jet system includes a plurality of members each is configured to move between a first position for directing a tangential flow around the drain of the at least one spin chamber and a second position for directing a radial flow toward the drain of the at least one spin chamber.

The invention relates to the technical field of vehicles, and particularly discloses an ejector, an engine and a vehicle, the ejector comprises a machine body, an oil duct switching assembly, a needle valve assembly and a driving assembly, the oil duct switching assembly comprises a first oil valve and a first moving rod which are in sliding connection, and a first pressure chamber is arranged in the first oil valve; an outlet of the first oil inlet channel communicates with the first pressure chamber, and the first sealing part on the first moving rod is arranged in the first pressure chamber. A first flat position and a second flat position are arranged on a needle valve body of the needle valve assembly in a spaced mode, the injection channel is sequentially divided into a first liquid inlet section, a second liquid inlet section and a liquid outlet section from an inlet to an outlet of the injection channel, an outlet of the first oil outlet channel is communicated with the first liquid inlet section, and an outlet of the second oil outlet channel is communicated with the second liquid inlet section. The driving assembly can drive the first moving rod to move, so that the first sealing part can selectively block and seal an inlet of the first oil outlet channel or an inlet of the second oil outlet channel, and therefore the injection rule of the injector is adjusted.

Embodiments of the present application disclose a fuel injection parameter adjustment method, device, equipment and storage medium. The fuel injection parameter adjustment method comprises: determining that a vehicle enters a series-parallel hybrid working condition; recording a set of initial fuel injection parameters of an engine; performing fuel injection parameter self-learning, obtaining a plurality of sets of test fuel injection parameters based on the set of initial fuel injection parameters; sequentially using the plurality of sets of test fuel injection parameters to run the engine, and calculating a plurality of test fuel consumptions of the vehicle; wherein each set of test fuel injection parameters corresponds to a test fuel consumption; the running time of each set of test fuel injection parameters is a first self-learning time; based on comparing the plurality of test fuel consumptions, determining an optimal self-learning result from the plurality of sets of test fuel injection parameters; and replacing the initial fuel injection parameters with the self-learning result.

The utility model relates to the field of diesel engine fuel injection valves, and in particular to a multifunctional dual-fuel low-speed diesel engine fuel injection valve. The multifunctional dual-fuel low-speed diesel engine fuel injection valve includes a check valve, a top cover, a valve seat, a nozzle, a limiting structure and an anti-skid structure. The check valve is located at the top and is used for high-pressure fuel inlet. The top cover is located below the check valve to enhance the stability of the lift. The valve seat is located below the top cover and is used to control the high-pressure hydraulic oil inlet of the thrust block stroke. The nozzle is located at the lower part of the valve seat and is used to control the injection of high-pressure fuel. A limiting structure is provided between the nozzle and the valve seat, and the nozzle is quickly disassembled and assembled through the limiting structure. An anti-skid mechanism is provided on the top cover, and the anti-skid structure is used to limit the loosening of the top cover when in use. The utility model can quickly disassemble and assemble the nozzle through the designed limiting structure, which greatly improves the convenience of repairing and replacing the nozzle, reduces downtime, and improves work efficiency.

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 invention relates to an external cylinder cover air inlet channel methanol injection switching system, and relates to the field of ship engineering and power systems. The methanol spraying device comprises a cylinder cover, a front-end switching block arranged at one end of the top of the cylinder cover, a methanol spraying device penetrating through the front-end switching block, a middle-end switching block arranged at the top of the methanol spraying device and connected with the front-end switching block, a rear-end switching block arranged on the middle-end switching block, a methanol distribution block arranged on the rear-end switching block and a methanol double-wall pipe arranged on the methanol distribution block. The alcohol spraying device is obliquely arranged above the air inlet channel and follows the air inlet direction, so that the spraying resistance is reduced; the methanol double-wall pipe is connected to the two transverse sides of the methanol distribution block, and methanol is supplied to the methanol sprayer through the middle-end adapter block and the rear-end adapter block. The external connection type design is adopted, large-scale transformation of an existing engine structure is not needed, the transformation cost and the implementation difficulty are reduced, and the method is suitable for various types of ship engines.

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.

The utility model belongs to the field of oil nozzles, particularly relates to an oil nozzle for a DelfF DFI2.5 type oil injector, and aims to solve the problem that most existing oil nozzles are only convenient to inject oil in one direction and inconvenient to inject oil in the peripheral range in the oil injection process, so that the application range is relatively single, the following scheme is provided: the oil nozzle comprises an oil injector body, the bottom of the fuel injector body is communicated with a fuel injection nozzle body; the first spraying assembly is arranged on the oil nozzle body and used for spraying in the peripheral range; and the second spraying assembly is arranged on the oil nozzle body and used for spraying the range in front of the nozzle. When the fuel injection device is used, fuel can be injected out in the form of a peripheral range, the contact area of the fuel and air is increased, the uniformity of mixed gas is improved, the effect of conveniently injecting the fuel into the peripheral range is achieved, the application range is wide, and the applicability is improved.

The invention relates to an injector arrangement (1) for a gas turbine, in particular an aircraft engine, for introducing a gaseous fuel and a liquid fuel as well as air into a combustion chamber (CC), comprising an injector shaft (2) and an injector main body (3) aligned along an injector longitudinal axis (L), wherein the injector main body (3) comprises: - a first gas channel (12) arranged centrally on the injector longitudinal axis (L) with a downstream outlet opening (14) for introducing a gas flow, - at least one air channel (31, 36, 40) arranged radially around the outside of the first gas channel (12), as a second gas channel (30), and - a liquid fuel injection (24) arranged radially around the first gas channel (12) for introducing the liquid fuel into the combustion chamber (CC).An advantageous emission characteristic can be achieved by designing the first gas channel (12) exclusively for introducing the gaseous fuel into the combustion chamber (CC) (Fig. 1).

A fuel injector is capable of injecting a plurality of different fuels in a single fuel injection event, the fuel injector including: a nozzle at an end of the fuel injector, the nozzle having a tip, openings in the tip of the nozzle through which fuel is configured to be injected, and a check valve member with a tip located within the nozzle, the check valve member being movable between an injection position in which fuel is injected via the openings and a closed position in which the openings are closed. The fuel injector further includes a primary fuel path within the fuel injector, a pilot fuel path within the fuel injector, and a mixing volume connecting the primary fuel path and the pilot fuel path when the check valve member is in the closed position.

Disclosed are an apparatus for a simulation test of diesel engine fuel spray in an alpine environment and a test method, the apparatus comprising a fuel storage and pretreatment device, a fuel injection system, an optical visualization system, an environment chamber, and a spray pretreatment system. In alpine environmental conditions, the apparatus can achieve high-pressure injection of liquid, separate injected atomized mist into fine droplets and impinge same on a wall surface by means of a multi-droplet generation apparatus and a wall surface apparatus, and observe and record the whole process by means of an optical visualization path. According to the present invention, the problem of difficulty in distinguishing droplets due to the coalescence of spray into a sheet is avoided, the costs of a traditional spray and droplet test solution can be significantly reduced, and the problem of a high level of dependence on a control program in a constant volume vessel solution is solved. According to the present invention, simulation of spray test in an alpine environment is possible, and the test apparatus has a simple structure. Moreover, it is possible to conduct regular research on free spray, multi-droplet wall impingement, spray wall impingement, and development characteristics thereof under conditions such as different altitudes and different temperatures.

The invention discloses a fuel nozzle flow test bench, and relates to the technical field of fuel nozzle testing, and the test bench comprises a fuel injection valve which is used for controlling the opening and closing of a plurality of nozzles, and the ports of the nozzles are provided with movable cavities; the measuring box is used for obtaining fuel flow parameters when the fuel injection valve is opened; the communicating pipe is used for guiding the fuel oil to the measuring box; the clamping unit is arranged in the movable cavity and comprises an abutting rod abutting against the communicating pipe. According to the fuel nozzle flow test bed, the abutting rod and the fixing clamp are matched to clamp the communicating pipe, and the pressing block is driven after the abutting rod reaches the unlocking station, so that the pressing block further abuts, the communicating pipe is locked at the nozzle port, and the communicating pipe is locked. At the moment, when the fuel injection valve is started, the phenomenon that the communicating pipe is loosened due to impact force of fuel injection can be effectively avoided, the communicating pipe only needs to be held with one hand in the process, and operation needed for fixing is reduced.

A fuel pre-heating component in a gas turbine engine includes a component housing extending around a central axis from a first end to a second end, wherein the component housing includes walls that define an inner chamber, a heating element positioned inside the inner chamber, and a plurality of internal fuel channels disposed within the component housing and configured to be heated by the heating element.

The utility model relates to the technical field of internal combustion engines, in particular to a double-nut locking pressure regulating oil injector which comprises a needle valve matching part, a nozzle tightening cap, a needle valve range limiting disc, an ejector rod, a pressure regulating spring, an oil injector body, a spring seat, a pressure regulating block and a pressure regulating nut. The pressure adjusting block, the spring seat, the pressure adjusting spring, the ejector rod, the needle valve range limiting disc and the needle valve matching part are sequentially installed in the oil sprayer body from top to bottom and are screwed and sealed through the nozzle tightening cap, the needle valve matching part comprises a needle valve body and a needle valve, a guide hole is formed in the upper end of the needle valve body, and a plurality of spraying holes are formed in the lower end of the needle valve body. The upper part of the needle valve is provided with a guide section which is correspondingly matched with the guide hole; an annular step is arranged at the upper end of the needle valve, and the diameter of the annular step is larger than that of the guide section. And an annular groove is formed in the lower end part of the guide section. The service life is prolonged, and the stability is improved.