2551 results about "Fuel injection" patented technology

The invention discloses a porous ejector, a use method thereof and a fuel cell system, and belongs to the technical field of fuel cells. Comprising a shell, a cavity is formed in the shell, and the cavity comprises a suction cavity, a mixing chamber, a second flow stabilizing chamber and a diffusion section which are sequentially arranged; a nozzle body is mounted in the suction cavity and is used for accelerating and depressurizing the driving fluid and spraying the accelerated and depressurized driving fluid into the suction cavity to form a negative pressure area; an ejection opening is formed in the side wall, corresponding to the suction cavity, of the shell and used for introducing an ejection fluid, and the ejection fluid and the driving fluid subjected to acceleration and pressure reduction are mixed in the mixing chamber; a nozzle assembly is arranged at the end, close to the mixing chamber, of the nozzle body and comprises at least one nozzle, and driving fluid is accelerated through a hole channel of the nozzle. The invention provides a porous ejector, a use method thereof and a fuel cell system, and solves the technical problems of low fuel injection efficiency and insufficient energy utilization of a single-hole ejector used in a traditional hydrogen supply system.

The invention relates to the technical field of aero-engine combustion chamber outlet temperature field monitoring, and discloses a multi-source data fusion method for an aero-engine combustion chamber outlet temperature field, and the method comprises the steps: unifying a multi-source data space-time reference through a standardized space grid and a precise time synchronization protocol; mapping the data to the same space-time grid by adopting a self-adaptive interpolation algorithm, and embedding a temperature gradient continuity constraint; the confidence coefficient weight is dynamically calculated based on a sensor drift error model and CFD residual feedback, and working condition self-adaptive weighted fusion is realized by using a fuzzy logic rule base; and the interpolation parameters and the weight distribution threshold values are optimized in a distributed mode through a federated learning framework, and fuel injection parameters are adjusted in combination with combustion chamber closed-loop control. The temperature field reconstruction precision and reliability are remarkably improved, the service life of turbine blades can be prolonged, the combustion efficiency can be optimized, and the method is suitable for real-time monitoring and regulation of the combustion state of an aero-engine.

The invention discloses a stator and oil injection assembly integrated oil cooling motor, a stator assembly is fixed in a casing, the stator assembly, a rotor assembly and the casing form a cooling cavity, the rotor assembly passes through the inner side of the stator assembly and is rotatably connected with the casing, and a rotating shaft oil duct communicated with the cooling cavity is arranged in the rotor assembly; the inner side of the end part of the stator assembly is provided with an oil injection assembly with an inclined flow guide hole, and the end part of the stator assembly is provided with a corresponding through hole, so that the internal oil duct of the outer circle of the stator core, the oil injection assembly and the cooling cavity are communicated; an oil inlet and an oil outlet are formed in the machine shell, cooling oil input from the oil inlet firstly flows through an internal oil channel to cool a stator iron core and then is guided and sprayed to an end winding through an inclined flow guide hole of an oil spraying assembly integrally installed on the stator assembly and a through hole in the end of the stator assembly, and cooling oil input from the rotor assembly firstly cools the interior of the rotor assembly and then cools the interior of the rotor assembly. And then the cooling oil is sprayed to the inner ring surface of the winding and is discharged through the oil outlet. The cooling device has the advantages of being compact in structure and remarkable in cooling effect.

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.

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.

A combustor includes a combustion liner that defines a combustion chamber and an outer sleeve spaced apart from the combustion liner, such that an annulus is defined between the combustion liner and the outer sleeve. The combustor further includes a fuel injection assembly having a boss coupled to at least one of the combustion liner and the outer sleeve. The boss includes an inner flange coupled to the combustion liner, an outer flange, and a body extending between the outer flange and the inner flange. The boss defines a cooling circuit having a post-impingement plenum defined in the inner flange between an inner wall of the inner flange and an impingement plate in cooling proximity to the inner wall; and a plurality of film cooling channels that are defined in the inner flange and fluidly couple the post-impingement plenum to the combustion chamber.

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.

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.

Operating a fuel injector in a fuel system for an engine includes energizing a first solenoid actuator to move a spill valve from a first position to a second, closed position, and energizing a second solenoid actuator to move a fuel injection valve in the fuel injector from a closed position to an open position. A pull-in tier of a waveform energizing the second solenoid actuator is generated via a first current produced by a boosted voltage power supply and a second current produced by a lower voltage power supply. Arrival timing of the valve at the open position is detected based on a property of the second current, such that a valve arrival timing error may be used to trim the fuel injector. Related methodology and control logic is also disclosed.

The invention provides an injection control method for a diesel-methanol dual-fuel engine, which comprises the following steps: acquiring a rotating speed signal, a load signal and a temperature signal of the engine, and determining initial diesel injection timing data and initial methanol injection timing data under the current working condition by combining preset respective injection MAP maps of dual fuels; according to the initial diesel injection timing data and the initial methanol injection timing data, the response time of each injector is fused, a dual-fuel injection time sequence model under a unified control framework is constructed, and the initial fusion injection moment is obtained; and according to the preliminary fusion injection time and the actually required injection duration, in combination with a preset injection priority rule, optimized dual-fuel injection time sequence control parameters are obtained through a self-adaptive genetic algorithm.

The application provides an integrated flame stabilizer with a tail edge cavity, which comprises a flame stabilizer, an oil injection rod, a cooling gas inlet pipe and a tail edge wing plate arranged at the rear side of the flame stabilizer, and a stable backflow ignition area is formed in the downstream area of the flame stabilizer; a plurality of cooling channels are arranged on the rear side plate of the flame stabilizer between the two tail edge wing plates, and the airflow direction at the outlet of the cooling channels is inclined to the flow direction, so that a cooling vortex is formed in the tail edge cavity, the flame stabilizer and the backflow ignition area are spaced from each other, the flame stabilizer and the downstream backflow ignition area are isolated from each other to reduce the thermal load of the components such as the flame stabilizer and the fuel injection pipe, the ablation and coking problems are avoided, meanwhile, the flame stabilizing function of the flame stabilizer is not damaged, and the influence on the backflow ignition area behind the stabilizer is small.

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.

A fuel injection system for an engine of a vehicle includes a throttle body and an elastomeric injection manifold coupled to the downstream end of the throttle body. The injection manifold defines a fuel injector socket. The fuel injection system also includes a fuel injector receivable by the fuel injector socket of the injection manifold and a fuel rail fluidly coupled to the fuel injector. The fuel rail supplies fuel to the fuel injector.

The invention relates to the technical field of oil supply assemblies in afterburner components of aero-engines, in particular to a multi-channel distributed series finger-shaped oil supply header pipe and an afterburner. The multi-channel distributed series finger-shaped oil supply header pipe comprises a body, and a plurality of fuel oil channels are formed in the body; the upper end of the fuel oil channel penetrates through the top surface of the body; each fuel oil channel is correspondingly provided with a plurality of main fuel oil injection holes, the main fuel oil injection holes are communicated with the fuel oil channels, and the axes of the main fuel oil injection holes are perpendicular to the central axis of the body; the plurality of main fuel injection holes in each fuel channel are arranged at intervals from top to bottom; a plurality of bypass oil injection holes are formed in the position close to the main oil injection hole, and the bypass oil injection holes are communicated with the main oil injection hole through connecting holes; the main oil injection hole, the bypass oil injection hole and the connecting hole are all formed in the body.

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 invention relates to the technical field of diesel generating sets, in particular to a master control loop of diesel generating set equipment. The system comprises a data acquisition module, a model creation module, a dynamic adjustment module and a multi-machine parallel module. Power change data of a load and rotating speed data of an engine are acquired through the data acquisition module, a long-short-term memory network model for predicting the rotating speed of the engine is constructed by utilizing the model creation module, and the fuel injection quantity of the engine is calculated by utilizing a PID control algorithm according to the predicted rotating speed value of the engine through the dynamic adjustment module. According to the change of load power, the fuel injection quantity of an engine is dynamically adjusted, the rotating speed of the engine is regulated and controlled to be in a stable state, it is guaranteed that a generator outputs stable voltage, a multi-machine parallel module controls the output power and frequency of each unit through a droop control method, the frequency is automatically adjusted, and phase embedding is synchronous; and multi-machine parallel loading is realized.

Present embodiments related to throttle body fuel injection systems intended to replace existing carburetors. More specifically, present embodiments relate to retrofitting carbureted engines with electronic fuel injection (EFI) which may be mounted on a manifold of an internal combustion engine and have bores of differing sizes and other characteristics which allow operation of such arrangement.

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 invention provides a carbon tank aging diagnosis method and device, a vehicle and a storage medium, and the method comprises the steps: determining a first theoretical fuel oil vapor adsorption amount of a carbon tank according to the fuel oil basic evaporation amount and evaporation time of fuel oil; when a preset carbon tank desorption condition is met, the carbon tank is controlled to execute desorption operation; in the process that the carbon tank executes desorption operation, the actual fuel steam desorption amount of the carbon tank is determined according to the desorption flow of the carbon tank, the air flow of a throttle valve, the fuel injection amount and the actual air-fuel ratio; and determining a carbon tank aging diagnosis result according to a comparison result of the first theoretical fuel oil steam adsorption amount and the actual fuel oil steam desorption amount. As whether the carbon tank is aged or not is diagnosed, a user can know the aging condition of the carbon tank in time, so that the aged carbon tank can be maintained or replaced in time, and the problem that the emission of evaporative pollutants of a vehicle exceeds the standard is avoided to a certain extent.

An axial fuel stage (AFS) injector includes a mixing member and a high pressure (HP) air-fuel injection member. The injection member includes HP air-fuel injectors including an inner wall defining an inner air jet and an outer wall surrounding and concentric with the inner wall and defining an outer air jet loop therebetween. A spacer member spaces the walls. A plurality of fuel injector passages extends from the outer wall through the spacer member and the inner wall to the inner air jet. Each fuel injector passage has an end including a fuel injector directed into the inner air jet. A fuel plenum is configured to deliver a fuel to each of the fuel injectors. The inner air jets and the air jet loops are configured to direct a high-pressure air flow from a high-pressure air source with the fuel into the inlet of the mixing member.

To provide a fuel pump and fuel injection system that can pressurize a plurality of kinds of fuels in a simple structure.SOLUTION: A fuel pump 10 comprises a first piston 16, a first pressure rising chamber 11, a second piston 21, and a second pressure rising chamber 12a. The first piston 16 is reciprocated by being pushed by a cam 13. The first pressure rising chamber 11 houses a first fuel to be pressurized by the first piston 16, and comprises a first discharge hole 18 for discharging the first fuel. The second piston 21 is reciprocated by being pushed by the first fuel pressurized by the first piston 16. The second pressure rising chamber 12a houses a second fuel to be pressurized by the second piston, and comprises a second discharge hole 23 for discharging the second fuel.SELECTED DRAWING: Figure 1

The invention provides a fuel injection device capable of fully mixing air and hydrogen fuel, the combustion stability and the combustion efficiency of the hydrogen fuel are improved, the problem of local overheating of a hydrogen fuel combustion chamber is avoided, and the pure hydrogen fuel injection device of the micro turbojet engine comprises an annular nozzle and a hydrogen fuel supply pipe which are arranged in the combustion chamber; the annular nozzle comprises a plurality of micro-mixing units, and each micro-mixing unit comprises an air channel and a fuel injection hole which are perpendicular to each other; a fuel gas road network is arranged in the annular nozzle and comprises a first gas path channel, a second gas path channel and gas holes; the first air channel and the second air channel are arranged in a front-back staggered mode in the axial direction of the annular nozzle, and the first air channel and the second air channel are communicated through the air holes. Each micro-mixing unit is communicated with the second gas path channel through a fuel injection hole, and the first gas path channel is communicated with the hydrogen fuel supply pipe.

The invention belongs to the field of scramjet engines, and particularly relates to an ammonia-hydrogen power wide-speed-range scramjet engine and a combustion method thereof. The ammonia-hydrogen power wide-speed-range scramjet engine comprises a combustion chamber, a liquid ammonia storage device and a hydrogen storage device; a concave cavity is formed in the combustion chamber, a fuel injection section upstream injection hole is formed in a fuel injection section of the concave cavity, the concave cavity is located at the downstream of the fuel injection section, a fuel injection section upstream micro-jet injection hole is formed in the upstream of the fuel injection section upstream injection hole, and a concave cavity inner micro-jet injection hole is formed in the concave cavity; the liquid ammonia storage device is connected with an upstream injection hole of the fuel injection section through a cooling structure; and the hydrogen storage device is connected with the upstream micro-jet injection hole of the fuel injection section and the micro-jet injection hole in the concave cavity. According to the invention, liquid ammonia and hydrogen are introduced as fuels to realize wide-range combustion organization, so that wide-range efficient combustion is realized, the fuel heat absorption requirement of high-Mach-number active cooling thermal protection is met, and zero carbon emission can be realized in the whole process.

The invention discloses a dual-fuel engine combustion control method based on hydrogen-ammonia energy ratio and gas distribution overlap angle regulation and control, which comprises the following steps: 1) fuel ratio control: acquiring current operation state parameters of an engine, determining a target AER according to preset mapping, regulating ammonia gas supply quantity and hydrogen supply quantity to enable the actual AER to reach the target AER, and controlling the fuel ratio; the AER is adaptively set according to engine load and combustion stability conditions; 2) valve timing control: adjusting the opening time of an intake valve or the closing time of an exhaust valve through a variable valve timing mechanism so as to change a valve timing overlap angle VOA, wherein the VOA is set to be a negative value, a small overlap angle or a positive overlap angle according to the working condition of an engine; (3) injection time sequence optimization is conducted, specifically, the injection time of ammonia gas and the in-cylinder direct injection time of hydrogen are controlled respectively, and coordinated optimization of a fuel injection strategy and valve timing is achieved; and 4) closed-loop steady-state control: monitoring a combustion state and an emission index in real time, comparing the combustion state and the emission index with a threshold value to serve as a feedback signal, and correcting the target AER and VOA settings in time. According to the dual-fuel engine combustion control method based on regulation and control of the hydrogen-ammonia energy ratio and the gas distribution overlapping angle, the energy ratio of hydrogen fuel and ammonia fuel and the overlapping opening angle of an intake valve and an exhaust valve are dynamically adjusted under different working conditions, so that the combustion reaction rate and temperature are coordinated, and the stable and efficient combustion process is achieved; and harmful emissions of NOx, unburned ammonia and the like are obviously reduced.

The embodiment of the invention relates to the technical field of nuclear reactors, in particular to a gaseous fuel reactor, a reactor and a reactivity adjusting method.The gaseous fuel reactor comprises a reactor body, a containing cavity is formed in the reactor body, the containing cavity is arranged to contain gaseous fuel, and a gaseous fuel injection port is formed in the reactor body; the gaseous fuel injection pipe is arranged at the gaseous fuel injection port, and gaseous fuel is input into the containing cavity through the gaseous fuel injection port and the gaseous fuel injection pipe; the gaseous fuel provides heat and transfers the heat to the heat exchange assembly; the reactivity control assembly is arranged to be capable of changing the volume of the gaseous fuel in the containing cavity. According to the gaseous fuel reactor provided by the embodiment of the invention, the gaseous fuel is adopted as the reactor core fuel of the reactor, and the reactivity of the gaseous fuel reactor is controlled by changing the volume of the gaseous fuel in the accommodating cavity through the reactivity control assembly, so that the redundancy and reliability of reactivity control are improved.

The invention discloses a precise sensing control method for the combustion state of an internal combustion engine. The method comprises the steps that S1, parameters are collected; s2, establishing a neural network model, training the neural network model, and identifying the running state of the internal combustion engine; s3, a fuzzy language is established, and respective fuzzy adjustment amounts of a fuel injection system, a valve transmission system and an ignition system are obtained; s4, self-adaptive control models of the fuel injection system, the valve transmission system and the ignition system are established respectively, and the self-adaptive adjustment amount of the fuel injection system, the self-adaptive adjustment amount of the valve transmission system and the self-adaptive adjustment amount of the ignition system are obtained; and S5, carrying out weighted fusion on the fuzzy adjustment amount and the adaptive adjustment amount to obtain a final adjustment amount. By collecting multi-dimensional operation parameters in real time, extracting time domain and frequency domain features and combining a deep neural network model, precise recognition and early warning of the operation state of the internal combustion engine are achieved, detection and response can be made in time when the working condition of the internal combustion engine changes slightly, and the problem that a traditional control system is lagged in response is solved.

Operating an engine system includes calculating a crank angle timing term corresponding to an in-cylinder temperature sufficient for autoignition of a first fuel injected at a first injection location. Operating an engine system further includes calculating, based on the crank angle timing term, at least one of an injection amount or an injection duration, to increase the in-cylinder temperature sufficiently via burning of the first fuel to ignite a second fuel injected into a mixture of the first fuel and pressurized intake air. The first fuel may include a blend of dimethyl ether (DME), methanol (MeOH), and water. Based on expected progression of in-cylinder temperatures, and fuel injection amount and / or duration based thereon, desirable controllability of combustion phasing and / or other combustion properties may be realized.

The present invention specifically relates to a correction control method for calculating the fuel injection amount at different altitudes of a port injection engine, a pressure correction control method for optimizing the fuel injection amount under different environmental pressures, a correction curve of the intake manifold pressure and the oil rail pressure difference is creatively introduced in the model calculation, and the correction value at different altitudes and different intake manifold pressures is accurately calibrated to ensure that the air-fuel ratio can be controlled at a theoretical optimal level at different altitudes. The present invention is based on a large amount of road test data, including measurements at different ambient temperatures and different altitudes. Through big data statistical cluster analysis, it is found that the key factor affecting the accurate calculation of the fuel amount of the port injection engine is the pressure difference between the oil rail pressure and the intake manifold. Through this method, on the one hand, the fuel economy at high altitudes can be reduced, while ensuring high power output in plateau environments.

A fuel injection valve support structure simple in structure is provided which is capable of preventing a fuel injection valve from rotating about an axis of a valve housing thereof without providing a special rotation-preventing piece on an elastic support member. In this support structure, a base plate (15) of an elastic support member (S) is provided with a notch (19) which receives a valve housing (1). A rotation-preventing protrusion (20) which engages with the notch (19) to prevent rotation of a fuel injection valve (I) about an axis (A) of the valve housing (1) is formed on a synthetic resin formation part (6) which covers the valve housing (1) while protruding a coupler (14) to one side.

The invention discloses a heavy duty vehicle pollutant emission correction method in a plateau environment, a storage medium and a PEMS, and the method comprises the steps: obtaining the plain PEMS emission data of a heavy duty vehicle, calculating the specific emission, calculating the window specific emission of NOx in the plateau environment according to the specific emission of the plain NOx, calculating the window specific emission of PN in the plateau environment according to the specific emission of the plain PN, and calculating the window specific emission of the PN in the plateau environment according to the window specific emission of the PN in the plateau environment. The plateau environment comprises correction factors such as altitude, environment temperature, fuel injection quantity, carbon loading quantity, exhaust temperature, exhaust flow, accumulated positive altitude increment and the like. Through verification, the correction method provided by the invention can more accurately estimate the pollutant emission condition in the plateau environment, so that the test efficiency and accuracy are improved.