1203results about "Fuel injection apparatus" patented technology

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 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).

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.

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.

Invention relates to a fuel ignitor (10) for gaseous fuel comprising a body assembly (12) having a longitudinal axis (A), and a first axial end and a second axial end. The ignitor body assembly (12) comprises a. a prechamber (20) arranged at the first axial end and having a tip, and more than two jet openings (22) arranged to the tip of prechamber (20) at the first axial end, b. a fuel inlet (26) arranged to open into the prechamber (20), c. first cavity (28) arranged to extend from the second axial end of the body assembly (12) to proximity to the prechamber (20), wherein a solenoid actuated gas admission valve unit (29) is arranged in the first cavity (28), d. second cavity arranged to extend from the second axial end of the body assembly (12) to the prechamber (20), wherein an ignition device (31) is arranged in the second cavity in cooperation with the prechamber (20) so as to initiate combustion of fuel in the prechamber (20), when in use, e. cooling channels (32) arranged at the first axial end of the ignitor body assembly (12) arranged in heat transfer connection with the prechamber (20). Invention relates also to a cylinder head - fuel ignitor combination, a gas operated internal combustion engine and method of converting an existing internal combustion piston engine.

This invention relates to a methanol fuel injector for an engine, comprising an injector body, a solenoid valve, a needle valve rod, a needle valve spring, and a needle valve. The solenoid valve is disposed on the top of the injector body. The solenoid valve includes a valve body, an electromagnet, and a solenoid valve spring. A control oil accumulator chamber is formed between the valve body and the needle valve spring. A control oil inlet is provided on one side of the injector body, communicating with the control oil accumulator chamber. A low-pressure chamber is formed between the valve body and the injector body. A control oil return port is provided on one side of the injector body, communicating with the low-pressure chamber. A methanol inlet passage is formed between the needle valve rod and the injector body. A methanol fuel accumulator chamber is formed between the needle valve and the injector body. A methanol inlet and return port is provided on one side of the injector body, communicating with the methanol inlet passage. This invention solves the problem of rapid wear of the control valve and effectively controls the upward leakage of methanol by introducing a piston structure.

A fuel injector (10) includes a mount (14), a stem (16), a nozzle (18), and a heat shield (12). The stem (16) extends from the mount (14). The nozzle (18) is at a distal end of the stem (16) opposite the mount (14) and configured to discharge an oxidant-fuel mixture along a nozzle axis (C). The heat shield (12) extends from the mount (14) towards the nozzle (18). The heat shield (12) includes a stem segment (12A) surrounding the stem (16) and at least a portion of the nozzle (18) and a compliant segment (12B) extending from the stem segment (12A) to the nozzle (18), a lip (26) extending from the nozzle (18), or a cap (28) surrounding the nozzle (18).

A gas turbine engine including a fuel injector having an outer valve body with an inner passage, a wall at least partially enclosing the inner passage, the wall having an inner surface, an outer surface, and one or more channels passing through the wall between the outer surface of the wall and the inner surface of the wall, and a retractable valve body positioned within the inner passage of the outer valve body. The retractable valve body has one or more slots in fluid communication with the fluid spin chamber. The retractable valve body is positioned within the inner passage to move along a reciprocating axis at one or more valve positions including an advanced valve position, a retracted valve position, an open valve position, and a closed valve position.

The utility model relates to the field of oil pumps, in particular to a centralized high-pressure common rail system. The common rail system comprises a PVC valve, a right cross rail connecting pipe, a left cross rail connecting pipe, a right high-pressure common rail, a left high-pressure common rail, a high-pressure oil pipe A, a high-pressure oil pipe B, a high-pressure oil pipe C, a safety valve and a rail pressure sensor, one side of the PVC valve is communicated with the right high-pressure common rail through the right cross rail connecting pipe, and the other side of the PVC valve is communicated with the left high-pressure common rail through the left cross rail connecting pipe. And a rail pressure sensor is mounted at the end of the right high-pressure common rail. The left high-pressure common rail and the right high-pressure common rail are connected at the rear end of the diesel engine through the left high-pressure common rail and the right high-pressure common rail, so that oil pressure in oil cavities of the left high-pressure common rail and the right high-pressure common rail tends to be consistent; the high-pressure common rail is of a double-layer pipe structure, and the high-pressure oil pipe and the high-pressure common rail are connected and sealed through a ball head. The high-pressure common rail inner pipe is an integral steel pipe, and the high-pressure common rail outer pipe is a sectional steel pipe, so that the high-pressure common rail has better safety and leakproofness.

A fuel injector includes a mount, a stem, a nozzle, and a heat shield. The stem extends from the mount. The nozzle is at a distal end of the stem opposite the mount and configured to discharge an oxidant-fuel mixture along a nozzle axis. The heat shield extends from the mount towards the nozzle. The heat shield includes a stem segment surrounding the stem and at least a portion of the nozzle and a compliant segment extending from the stem segment to the nozzle, a lip extending from the nozzle, or a cap surrounding the nozzle.

A pneumatic impact disassembly tool includes an impact cylinder, a separator disposed in the impact cylinder to divide it into a first and a second chamber, an air conduit, an air inlet switch, and a connection rod. The separator has an air chamber in communication with the first and the second chambers through a first and a second air ducts. The air conduit passes through the impact cylinder to be connected with the separator and communicates with the air chamber. The air inlet switch is coaxially connected with the air conduit and controls the gas entry into the impact cylinder. The connection rod passes through the impact cylinder to be coaxially connected with the air conduit. When the air conduit inputs a gas, the impact cylinder generates a sliding shock back and forth between the air conduit and the connection rod for pneumatic impact disassembly.

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 disclosure is directed to a supersonic oblique rotating detonation wave engine (SORDE) and systems and methods for generating a supersonic oblique rotating detonation wave. The SORDE is configured to produce and sustain a supersonic oblique rotating detonation wave through the injection of fuel at supersonic speeds into an inlet air flow between Mach 1 and Mach 7. The SORDE and method include injecting fuel into the inlet air in an amount to generate an equivalence ratio of 0.2 to 2.5. Some embodiments include a plurality of fuel injector ports each having a diameter of about 0.010 inches to about 0.040 inches; an annular wedge disposed in or upstream of the detonation chamber with an angle of about 5 degrees to about 40 degrees relative to a longitudinal axis of the engine; and / or a cylindrical center body disposed in or upstream of the detonation chamber.

The utility model belongs to the technical field of diesel engines, and relates to a hydrogen fuel single-cylinder engine which comprises a piston and a piston pit located at the end of the piston, and the piston pit is of a shallow-basin-shaped structure. The system further comprises a hydrogen inlet system and an electric control system, the hydrogen inlet system comprises a hydrogen sprayer, a hydrogen cylinder, a gas delivery pipe and a pressure increasing valve, the electric control system comprises a control unit, an electronic accelerator and a crankshaft position sensor, the hydrogen cylinder is communicated with the hydrogen sprayer through the gas delivery pipe, the hydrogen sprayer is communicated with the combustion chamber, and the pressure increasing valve is arranged on the gas delivery pipe. And the control unit is electrically connected with the hydrogen sprayer, the electronic throttle and the crankshaft position sensor respectively. The structure of the piston pit is improved, the electronic control gas injection system and the fuel oil injection system are adopted to replace a traditional pure fuel oil injection system, timing and quantification of hydrogen gas injection can be guaranteed, good economical efficiency is achieved, and the hydrogen gas replacement rate can reach about 90%; pollutant emission is greatly reduced, and low oil consumption is kept.

The invention belongs to the technical field of engines, and discloses a multi-mode combustion system of a low-carbon fuel engine and a control method thereof.The multi-mode combustion system of the low-carbon fuel engine comprises a supercharger, an air inlet supercharging cooler, an engine body, a Miller adjusting mechanism and an exhaust gas recirculation (EGR) system, the Miller adjusting mechanism is arranged between the cooled air inlet channel and the engine body, and the engine body is provided with a dual-fuel injector used for injecting ignition fuel and low-carbon fuel into an air cylinder. An exhaust port of the engine body is connected with an exhaust passage, the other end of the exhaust passage is divided into two paths, one path is connected with an exhaust emission pipeline through an exhaust machine inlet of the supercharger, and the other path is communicated to an intercooling rear air inlet passage sequentially through an EGR valve and an EGR cooler. According to the multi-mode combustion system of the low-carbon fuel engine and the control method of the multi-mode combustion system, efficient compression ignition of low-carbon fuel can be achieved, the combustion process is accurately controlled, and soot emission is remarkably reduced.

The invention relates to the field of gas ejectors, in particular to a valve needle stroke monitoring device and method.The valve needle stroke monitoring device comprises a clamping mechanism, a magnetic induction mechanism, a double-guide reset mechanism and a shell mechanism, and the clamping mechanism is used for clamping a valve body of the gas ejector; the magnetic induction mechanism comprises an ejector rod, a magnet and a Hall effect sensor, one end of the ejector rod is configured to be in contact with the end part of a valve needle of the gas ejector, the magnet is arranged at the other end of the ejector rod, and the Hall effect sensor is arranged opposite to the magnet to detect the displacement of the magnet; the double-guide reset mechanism is used for providing axial reset force for the ejector rod; the shell mechanism is used for integrating the clamping mechanism, the magnetic induction mechanism and the double-guide reset mechanism. According to the method, the real-time stroke of the valve needle is calculated according to the difference value between the real-time position signal and the initial position signal. By adopting the technical scheme, the stroke of the valve needle can be directly measured in a high-precision, high-reliability and convenient-to-mount manner.

The present application belongs to the field of fluid dynamics, and particularly relates to a fluid enhancing device. The device comprises a pressure cylinder and an enhancing part. The tail of the pressure cylinder is provided with a tail spray cover, and a plurality of holes are formed in the tail spray cover. The enhancing part is composed of a connecting pipe and a fluid amplifier. The connecting pipe connects the holes and the fluid amplifier. A sleeve pipe is further arranged on the pressure cylinder and connected to the inside of the pressure cylinder. A sealing layer is arranged in the sleeve pipe. The present application provides a fluid enhancing device. After the fluid enhancing device is installed on a fluid generator capable of generating high-pressure fluid, the fluid spraying amount can be increased by multiple times under normal operation without increasing additional fuel and energy consumption. Moreover, the fluid generator and the sprayed fluid can be cooled.

A method (100) for adjusting the timing of fuel injection into a combustion chamber (24) of a compression ignition engine (12), the method (100) comprising: Detect (102), via an electronic control (60), a request to generate zero torque by the motor; Switching off (104), via the electronic control (60), of the fuel supply to the combustion chamber (24) during the detected requirement to generate a torque of zero; Issue (106), via the electronic control (60), a command to inject a test quantity of fuel into the combustion chamber (24) while the detected requirement to generate zero torque exists; Assess (108), via the electronic control (60), a time delay (74) between the command given to inject the test fuel quantity and the start of the injection of the test fuel quantity; Determine (110), via the electronic control (60), a compensation for the assessed time delay (74); Detect (116), via the electronic control (60), a request to generate a positive torque by the motor and commands (118), via the electronic control (60), a shift in the timing of fuel injection into the combustion chamber (24) by the determined compensation during positive torque generation by the engine.

The embodiment of the invention relates to the field of vehicle control, in particular to an engine rail pressure control method, device and equipment and a storage medium, and aims at achieving accurate pre-control over the engine rail pressure. The method comprises the following steps: mounting an engine on a test bench; the engine is tested and calibrated through the test bench, and a slope three-dimensional diagram and an intercept diagram of the engine under each set of rotating speed and rail pressure are obtained; and according to the slope three-dimensional diagram and the intercept diagram, the corresponding relation between the relative oil injection quantity and the oil pumping continuous angle under each set of rotating speed and rail pressure is determined so as to control normal operation of the engine.

The present application relates to a kind of fire diesel engine low temperature combustion efficiency promotion method.Fire diesel engine low temperature combustion efficiency promotion method, starting stage does not need to rely on external point heating equipment, preheating is carried out to intake and fuel respectively using exhaust waste heat and the integrated effect of repeated start, repeated heating under the control of multiple parameters, effectively guarantee the reliability of fast emergency start and emergency start under low temperature environment, through the integrated effect of ultrasonic atomization, multiple parameter collaborative control, effectively solve the problem of poor fuel atomization, mixture is not uniform, combustion is insufficient under low temperature condition, the combustion efficiency under low temperature condition is significantly improved, through the mutual coordination of residual humidity detection, ultrasonic auxiliary water removal unit in shutdown stage, the reliability of next start can be guaranteed.Therefore, the above-mentioned fire diesel engine low temperature combustion efficiency promotion method adapts to the scene demand of fire emergency without external power supply, fast response.

The invention aims to provide a single needle valve type high-response methanol-diesel injector based on opposed electromagnetic valve control, and belongs to the field of engines. Opposite type double-medium channel control assemblies are installed in an ejector connector body, an ejector middle body and an ejector throttling block, a methanol / diesel shared nozzle assembly is installed in a nozzle body, a diesel connector and a methanol connector are installed on the side of the ejector connector body, a high-pressure diesel channel is arranged in the diesel connector, and a high-pressure methanol channel is arranged in the methanol connector. Free connection and disconnection of an internal high-pressure methanol path and an internal high-pressure diesel path can be controlled, then independent injection of methanol fuel and diesel fuel is achieved, the two fuel injection modes are controlled through the same needle valve, the fuel is injected through the same injection hole, and the advantages of being high in reliability and simple in structure are achieved. And after methanol / diesel oil injection is finished, rapid cut-off of an internal passage of the injector and rapid seating of the needle valve can be achieved, and the response characteristic of fuel injection mode switching of the injector is improved.

The invention discloses a diesel engine plunger lift and oil supply starting point synchronous measurement device and method, and the device comprises a high-pressure oil pump, an oil guide cavity supporting barrel is installed in an oil outlet valve installation hole in the upper end of the high-pressure oil pump, and the upper end and the lower end of the oil guide cavity supporting barrel are respectively provided with an upper cover plate and a lower cover plate. Central holes are formed in the middle positions of the upper cover plate and the lower cover plate; a fixing support is installed at the upper end of the oil guide cavity supporting barrel, an electronic digital display stroke module is installed at the upper end of the fixing support, and the lower end of the electronic digital display stroke module is connected with a measuring rod. According to the diesel engine plunger lift and oil supply starting point synchronous measurement device and method, the problems of disassembly loss, manual errors and incapability of cross validation of data in a traditional method are solved, two-parameter in-situ synchronous measurement is realized, meanwhile, an oil outlet valve does not need to be disassembled and a plunger cavity does not need to be opened, risks such as foreign matter invasion are avoided, and the measurement precision and convenience are greatly improved.

The application discloses a system and method for processing virtual development bench hardware-in-the-loop heat dissipation, and is used for improving a hardware-in-the-loop running environment. The system comprises a flat plate heat exchange module, a fan module, an oil inlet pipeline, a fan control module, a hardware-in-the-loop cabinet, an oil outlet pipeline, an oil quantity measurement unit, an oil sprayer, a cooling oil tank, a temperature sensor, a cooling tank connecting pipeline and an oil circulation pump. The flat plate heat exchange module is connected with the oil inlet pipeline, the cooling tank connecting pipeline, the cooling oil tank and the oil outlet pipeline in sequence. The flat plate heat exchange module is provided with the fan module on one side, the fan module is connected with the fan control module, the hardware-in-the-loop cabinet is connected with the fan control module, the temperature sensor and the oil circulation pump, the temperature sensor is arranged on the cooling tank connecting pipeline and the sensing head of the temperature sensor is immersed in the oil medium, the oil circulation pump is installed at the connecting port of the cooling tank connecting pipeline and the oil inlet pipeline, and the oil quantity measurement unit and the oil sprayer are both installed on the cooling oil tank and the heads of the oil quantity measurement unit and the oil sprayer are both immersed in the oil medium to a preset depth.

The present invention belongs to the field of machining. Disclosed are a methanol engine having a stable methanol injection amount, an injection apparatus and an injection control method. The injection apparatus comprises cylinders, wherein a gas intake pipe is provided at gas inlets of the cylinders, a gas exhaust pipe is provided at gas outlets of the cylinders, and at least two methanol injectors are provided in each cylinder; and each cylinder has a gear transmission structure, and the gear transmission structure has displacement sensors, which are used for acquiring displacement change parameters of the gear transmission structure and transmitting parameter data to an external control system, so as to control parameters that affect the injection of methanol injectors. On the basis of operating states such as the rotation speed and load of an engine, the turning-on and turning-off of injectors can be adaptively controlled, and the injection amount of each injector in operation is adjusted, thereby mitigating the impact of methanol injectors on the operation of the engine during the processes of putting the methanol injectors into operation and taking same out of operation.

The application discloses a kind of layer board type ammonia-hydrogen mixed fuel nozzle, the nozzle includes bottom platform, cover and flow guide column, the fixed end and ammonia fuel import end of the flow guide column, the fixed end of the flow guide column is fixedly connected with cover, and the ammonia fuel import end of the flow guide column extends outward and penetrates bottom platform;The middle part of the flow guide column is provided with a plurality of ammonia fuel outlets;Flow guide column between bottom platform and cover is provided with by a plurality of first flow guide plate and second flow guide plate alternately arranged and formed layer board stack;The bottom platform is also provided with a plurality of hydrogen fuel inlet channels.The layer board type ammonia-hydrogen mixed fuel nozzle of the application is formed by layer board stack etched with multiple flow channels, and the function of directly injecting and mixing ammonia and hydrogen two fuels without mixing container can be realized.

The purpose of this invention is to provide a dual-fuel injector with variable injection patterns, belonging to the category of fuel injection devices. It includes a diesel injection section and a low-carbon fuel injection section, both located within the injector body. The diesel injection section, from top to bottom, includes a diesel accumulator chamber, a No. 1 injection control pipeline co-control module, a super hysteresis electromagnetic control needle valve limit module, and a diesel nozzle. The low-carbon fuel injection section, from top to bottom, includes a two-stage booster module, a low-carbon fuel thermal management accumulator module, a No. 2 injection control pipeline co-control module, and a low-carbon fuel nozzle. This invention enables independent injection of diesel and low-carbon fuels and effectively controls the phase state of the low-carbon fuel injected into the cylinder. By controlling the injection pressure and needle valve lift, it achieves flexible and variable injection patterns to meet the needs of different engine operating conditions. It also enables high-response needle valve closure and prevents secondary opening of the needle valve due to pressure fluctuations.

The invention discloses a method and system for analyzing factors influencing radial expansion of flash jet flow of an oil injector, and relates to the field of oil injectors. Flash evaporation spraying images of the single-hole oil sprayer under different thermal working conditions are collected; the thermal working condition comprises injection temperature and environment pressure; obtaining a spraying width within a preset axial distance from a nozzle outlet according to the flash evaporation spraying image; establishing a nucleation rate model according to the injection temperature and the environment pressure; determining a nucleation rate index according to the nucleation rate model; taking the spray width as a measurement index of radial expansion, and establishing an incidence relation between the spray width and a nucleation rate index; according to the incidence relation, determining a factor influencing radial expansion: when the spray width is increased along with the increase of the nucleation rate index, the influence factor is the nucleation rate; when the spray width tends to be stable along with the increase of the nucleation rate index, the influence factor is heat energy required by vaporization.

The utility model relates to an integrated structure of a glow plug and an oil injector sleeve of an internal combustion engine. The fuel injector sleeve comprises a containing cavity used for arranging a fuel injector and an end wall located on one side of the containing cavity, a center hole is formed in the end wall in a penetrating mode, and at least one through hole is distributed in the end wall along the periphery of the center hole. The mounting sleeve is mounted in the accommodating cavity, and the mounting sleeve comprises an accommodating hole corresponding to the through hole; and the heating body comprises a mounting end and a heating end, the mounting end extends into and is connected with the accommodating hole, and the heating end extends out of the through hole. Due to the integrated design of the glow plug and the fuel injector sleeve, the overall size is effectively reduced, the occupied space is smaller, and the compact layout of the internal combustion engine is facilitated.

A fuel tank vent valve includes a venting apparatus for regulating discharge of fuel vapor from a fuel tank and admission of outside air into a fuel tank. The vent valve is used to regulate pressure in a fuel tank.