85 results about "Water injection (engine)" patented technology

The present invention relates to a method for operating an internal combustion engine (100), wherein, in order to abruptly reduce a torque of the internal combustion engine (100) and / or to provide a low torque by the internal combustion engine (100), a retarded ignition angle adjustment is carried out, wherein water is injected into an intake tract (2) of the internal combustion engine (100) by means of a water injection system (4), and wherein a limit ignition angle for the ignition angle adjustment is determined based on a quantity of water injected by the water injection system (4). The present invention further relates to an internal combustion engine (100) comprising a water injection system (4) and a control unit (5) that is configured to carry out an inventive method for operating the internal combustion engine (100).

The application belongs to the technical field of aero-engines, and particularly relates to a method for controlling water flow of a multi-pipeline ejection pre-cooling system of an aero-engine. The water flow of the multi-pipeline is allocated by a digital electronic controller, and each pipeline is independently controlled. The given value of the water supply is calculated by means of temperature deviation, closed-loop control is realized, and the fitting degree of the water injection amount and the required cooling amount is improved. Through the feedback of the inlet temperature, the dependence on the control accuracy of the water metering valve can be reduced. Even if the metered water is inaccurate, it can be compensated through temperature closed-loop adjustment, the industrial requirements of the valve and the electro-hydraulic servo valve are reduced, and the production cost is reduced.

Embodiments of the present application provide an online water injection system and method for fuel icing test, relating to the field of aero-engine fuel icing test. It aims to improve the problem of unstable water content of fuel distribution in fuel icing test. It includes main oil supply path, steady-state water injection cylinder, steady-state nozzle, transient water injection cylinder, transient nozzle, bypass solenoid valve, oil supply pressure sensor and test piece; the steady-state water injection cylinder is connected with the steady-state nozzle, and the transient water injection cylinder is connected with the transient nozzle; the bypass solenoid valve is connected with the test piece in parallel, and the bypass solenoid valve is connected with the oil supply pressure sensor. Through the parallel connection scheme of the bypass electric control valve and the test piece, the transition state water-containing fuel oil supply is converted into steady-state supply, solving the problem that the water injection flow cannot quickly follow the change of fuel flow during the transition state of the test piece, and further providing stable water-containing fuel oil, realizing the continuous supply of stable water-containing fuel oil under the transition condition.

The present invention relates to a method for diagnosing a water injection system (3) of an internal combustion engine (2) of a hybrid electric vehicle (100), comprising: providing water at a defined test water pressure by means of a water supply device (3.3), closing a shut-off valve (3.4) when water at the defined test water pressure is provided, injecting a defined target quantity of water into an intake manifold (2.2) of the internal combustion engine (2) via the injection nozzle (3.1), and determining a pressure after injection in a section of the water line (3.4) located between the injection nozzle (3.1) and the shut-off valve (3.4).2) remaining residual water pressure, wherein a current engine load of the internal combustion engine (2) is determined before injection, wherein the determined current engine load is compared with a load threshold value, and wherein the internal combustion engine (2) is subjected to an additional load by operating an electric traction motor (1) of the hybrid electric vehicle (100) in generator mode if the determined current engine load is less than the load threshold value. The present invention further relates to a hybrid electric vehicle (100) with a diagnostic unit (4) which is configured to carry out a method according to the invention.

A resettable, segmented pressure-driven water injection process string and method, belonging to the field of oilfield engineering technology, comprises, from bottom to top, a seated sliding sleeve connected sequentially to a lower reset sliding sleeve, packer I, a middle reset sliding sleeve, packer II, an upper reset sliding sleeve, packer III, a high-pressure well-washing valve, and tubing threads. The water injection string is lowered into the casing. The upper end of the tubing is suspended above the lower four-way valve at the water injection wellhead via a self-sealing core. A ball-dropped blowout preventer is located above the test gate at the water injection wellhead. An annular pressure self-balancing device is connected to the left-side production valve. The lower balancing hole, drain hole I, and inlet hole I of the annular pressure self-balancing device are connected to the left-side casing gate valve at the water injection wellhead via a connecting pipe. This invention is applicable to segmented pressure-driven water injection in oilfield water injection wells, meeting the needs of segmented formation water injection. The injection string can be reused, improving the qualification rate of the injection segments and saving operating costs.

The invention discloses a dual-fuel single-cylinder engine combustion system based on water spraying-EGR cooperative control and a control method of the dual-fuel single-cylinder engine combustion system, and belongs to the technical field of engines. A dual-fuel single-cylinder engine combustion system based on water spray-EGR cooperative control comprises a hydrogen direct injection system, a diesel injection system, an air inlet channel water spray system, a turbocharging system, an EGR system and an electric control system, and a high-pressure water pump of the water spray system is connected with an air compressor of the turbocharging system through a coupler; the system further comprises an exhaust water circulation system, the exhaust water circulation system comprises a water-steam separator, the water-steam separator is connected to an engine exhaust pipeline, and the water separation end of the water-steam separator is connected with the water tank through a pipeline. One end of the EGR system is connected to an engine exhaust pipeline behind the water-steam separator, and the other end of the EGR system is connected to an engine air inlet pipeline in front of the air compressor. And the ECU performs water spraying-EGR cooperative control according to the working condition of the engine.

The invention relates to the technical field of oil field oil production engineering, in particular to a sand blocking prevention rotational flow groove type sliding valve mechanism of a constant flow blanking plug for a water injection well. The mechanism comprises a fishing rod, the fishing rod penetrates through a pressing cap, a cam is inserted into the bottom end of the fishing rod, the pressing cap is connected with an upper body, the cam is installed on the upper body, the lower end of the upper body is connected with a lower body, the inner side of the lower body is connected with a sliding valve, a gap is formed between the sliding valve and the lower body, and a first contact face is arranged between the sliding valve and the lower body. The sliding valve is provided with at least one rotational flow groove, the rotational flow groove is spirally wound on the outer surface of the sliding valve, the upper end of the sliding valve is connected with a limiting righting rod, the limiting righting rod controls the sliding valve to rotate and slide in a reciprocating mode, a water nozzle is installed in the lower end of the sliding valve, a filter screen is installed at the bottom end of the lower body, and a plurality of O-shaped packing are installed on the filter screen. According to the sand blocking prevention rotational flow groove type sliding valve mechanism of the constant-flow blanking plug for the water injection well, the sand blocking probability of the sliding valve of the constant-flow blanking plug is effectively reduced, and the technological service life of the constant-flow blanking plug is prolonged.

The invention relates to a rocket takeoff jet flow noise prediction method and system containing multistage water spraying, and belongs to the technical field of aerospace transportation systems.The takeoff jet flow is dispersed into a series of independent point sound sources, sound power and sound radiation characteristics of the point sound sources are established respectively, meanwhile, a control volume is delimited in a jet flow water spraying area, and the control volume is calculated; the jet flow parameter ratio before and after water spraying is calculated, the sound power and radiation characteristics of the point sound source after water spraying are obtained through calculation, and then takeoff jet flow noise after water spraying is obtained; according to the method, takeoff jet noise prediction under different water spraying parameters can be realized, and reference is provided for noise environment design and water spraying scheme design; according to the rocket takeoff jet flow sound source distribution and the rocket takeoff water spraying position, the deflection jet flow noise radiation characteristic and the effective water spraying rate are obtained, the total sound pressure level precision at the takeoff noise peak moment is predicted to be superior to 3dB, the prediction precision of the peak frequency band of the 1 / 3 octave spectrum at the peak moment is predicted to be superior to 3dB, and the method has important engineering application and popularization value.

The invention discloses an ammonia hydrogen engine-PEMFC new energy hybrid power system integrated water management system and method, and belongs to the technical field of new energy automobiles. The system comprises an air supply loop, a water management loop, a cooling loop, a fuel supply loop and an exhaust loop, the system is coupled with a valve through a pipeline, recovery, purification and storage of water generated by a fuel cell are achieved, and the water is used for fuel cell air inlet humidification or water spraying emission reduction in an engine cylinder according to working condition requirements. The cooling loop provides a cold source for fuel cell cathode waste gas dehumidification through liquid ammonia gasification heat absorption, meanwhile, engine inlet air is cooled, and collaborative management of water and heat and energy recovery are achieved. According to the control method, the water level of the water tank and the power requirement of the whole vehicle serve as input, three working modes of a pure engine, a pure fuel cell and hybrid power are divided, a priority distribution strategy of water resources is dynamically formulated according to the height of the water level, and finally an integrated water-heat coupling control strategy is generated.

The utility model relates to the technical field of hydraulic engineering, and discloses a hydraulic engineering construction water injection device which comprises a support assembly and is characterized in that a moving assembly is installed at the bottom of the support assembly, a transmission assembly is installed in the middle of the top of the support assembly, and a split-flow water injection assembly is arranged on one side of the transmission assembly; and the braking assemblies are installed on the two sides of the transmission assembly in an associated mode, the split-flow water injection assembly is installed in the support assembly, and the tail ends of the braking assemblies are arranged on the top of the rear side moving assembly. The split-flow water injection assembly is installed on the device, so that when the device is used and water injection work is carried out, water injection work of two different pipelines can be carried out through the arranged split-flow water injection assembly, and therefore certain water injection efficiency can be improved.

The present invention relates to a method for operating an internal combustion engine (100), wherein a torque output by the internal combustion engine (100) is determined by means of a torque model (5.2.1) based on operating parameters of the internal combustion engine (100), wherein water is injected into an intake manifold (2) of the internal combustion engine (100) by means of a water injection system (4), and wherein a correction parameter is determined by the torque model (5.2.1) based on the amount of water injected by the water injection system (4). The present invention further relates to an internal combustion engine (100) comprising a water injection system (4) and a control unit (5) configured to execute a method according to the invention for operating the internal combustion engine (100).

The invention provides a device for verifying an engine driving exhaust emission system in a laboratory, and belongs to the technical field of exhaust emission. Comprising an experiment bench used for bearing an engine, the engine arranged in the experiment bench, an exhaust pipeline used for collecting engine tail gas and injected air, a spraying cooling system integrated in the exhaust pipeline, and a back pressure control system arranged at the rear end of the exhaust pipeline. The measuring systems are arranged at different parts of the device; and the control system is used for controlling the device to work. The device integrates multivariable adjusting functions such as the shape / size of an exhaust pipeline, the water spraying amount, the back pressure and the engine working condition, and the influences of different parameters on the injection ratio, the temperature field and the pressure distribution can be tested independently or in a combined mode. An economical and efficient solution can be provided for laboratory test run of the small / micro turbojet engine; experimental data can directly guide the design of an actual airplane laboratory exhaust pipeline and an exhaust tower, and the development period is shortened.

The invention discloses a bladeless water jet propulsion device, and relates to the technical field of ship engineering or underwater propulsion, the bladeless water jet propulsion device comprises a support and a shell, the shell is provided with two fluid inlets and outlets, and the two fluid inlets and outlets are respectively a water inlet and a water jet; the shell is internally provided with a pressurizing chamber, the pressurizing chamber is communicated with the water inlet and the water injection nozzle, and the shell is rotationally connected with a crankshaft and a double-cavity partition plate which are coaxial with the pressurizing chamber; the two sides of the crankshaft are each fixedly provided with two peristaltic wheels, and the peristaltic wheels located in the portions, on the two sides of the double-cavity partition plate, of the pressurizing cavity are coaxially arranged on the crankshaft. The pressurizing chamber is in a cylindrical shape, and the peristaltic wheel is in a cylindrical shape. According to the novel blade type propeller, the inherent technical problem of a traditional blade type propeller is fundamentally solved, the safety, reliability and environmental adaptability of equipment are remarkably improved, and due to the fact that exposed rotating blades are abandoned, the propelling failure or overload risk caused by the fact that the blades are wound by sundries such as aquatic plants, fishing nets and floating objects is thoroughly eliminated.

The present application provides a kind of control device and control method of engine, engine has multiple air intake ports connected with cylinder and water injection valve for respectively corresponding air intake port into water injection.The control device of engine is configured to selectively execute only during the opening of air valve Synchronous injection of water injection valve water injection and non-synchronous injection of water injection valve water injection during the closing of air valve according to each air intake port in the multiple air intake ports.Control device is configured to, when executing the state of synchronous / non-synchronous mixed injection that becomes multiple air intake ports containing the air intake port of implementing synchronous injection and the air intake port of implementing non-synchronous injection, switching processing is carried out to the air intake port of implementing non-synchronous injection.

An amount of condensed water generated in an EGR passage and flowing into one cylinder in a unit period is referred to as an EGR water amount. Memory stores information indicating a corresponding relationship between a parameter related to an operation state of an internal combustion engine and a parameter related to the EGR water amount for each cylinder. When the internal combustion engine is operating, a controller acquires a value obtained by subtracting the EGR water amount of each cylinder from a reference water amount that corresponds to the operation state of the internal combustion engine as a target water injection amount of each cylinder based on the information. The controller controls each water injection valve so that the water injection valve injects the target water injection amount of each cylinder.

The invention discloses a hydrogen engine in-cylinder water spraying system based on AI control, and the system comprises a sensing layer which comprises an environment temperature sensor, an in-cylinder pressure sensor, a knock intensity sensor and a water spraying system state sensor, and is also used for collecting multi-source data; the decision-making layer comprises a fusion rule type intelligent agent, a learning type intelligent agent and a reasoning type intelligent agent, and the decision-making layer is used for outputting injection timing, water injection amount and pressure optimization parameters; the execution layer comprises an ejector high-pressure water supply unit; and the guarantee layer comprises a temperature compensation module, a fault diagnosis module and a redundancy control module, and the guarantee layer is used for realizing wide temperature range safety protection. The problems that in the prior art, combustion control is poor, water mist is not sufficiently evaporated in an air inlet channel; spray distribution is not uniform; the system response speed is low; and operation cannot be carried out under the working condition of a low-temperature environment.

The invention relates to a control system and method for preventing cooling water of a diesel engine from sucking air and a catamaran, and belongs to the technical field of catamaran ships. A high-level water replenishing tank is arranged on an upper-layer building and connected to a diesel engine cooling pipeline; and the monitoring unit is matched with a left-and-right side communicating pipeline, so that reliable water injection before starting, water replenishing during abnormal operation and balance of water tanks on two sides are realized. The air suction risk of an overhead diesel engine is avoided, the operation stability under the complex sea condition is remarkably improved, maintenance is convenient, and the air suction device is particularly suitable for a small waterplane area catamaran.

This invention provides a simulation method for a pressurized water phase regulation system of a hydropower unit, relating to the field of water conservancy and hydropower engineering technology. The method includes: analyzing and extracting system parameters, and establishing three modeling frameworks; constructing a turbine model within the first framework based on the water level in the runner chamber; setting different runner speeds, determining the optimal cross-sectional area of ​​the throttle valve based on Bernoulli's equation, dividing the lubrication interval according to flow rate, and establishing a mapping relationship between cross-sectional area and speed, constructing a leak-proof ring water supply system model within the second framework; establishing the relationship between water level and leakage time and flow rate, and combining hydraulic and pneumatic systems to construct an air-pressurized water-liquid mixing system model within the third framework; finally, building a control system, connecting and coordinating the detection and action components of each model to achieve signal acquisition and action control. This method effectively solves the technical problems of low design reliability, poor debugging efficiency, and difficulty in fault prediction caused by the lack of a complete simulation model in existing technologies, resulting in high reliability.

Methods for an engine, including: During an initial state, in response to an engine dilution request, intake manifold injection of water to a closed intake valve; and During a second state, in response to engine knocking, intake manifold injection of water away from an open intake valve, whereby during the second state, relative to the first state, a larger proportion of the injected water remains in liquid form after injection.

The invention relates to the technical field of LNG engineering, in particular to a water injection and drainage system of an LNG fuel tank. The water injection and drainage system of the LNG fuel tank comprises a first pipeline, a second pipeline, a third pipeline, a submersible pump, a water injection pipeline and a drainage pipeline, the first pipeline is fixed to an auxiliary structure on one side of the fuel tank in the vertical direction, the upper end of the first pipeline communicates with the fuel tank through the second pipeline, a first connector in the lower end communicates with the water injection pipeline, and a second connector communicates with the drainage pipeline; the submersible pump is arranged at the bottom in the fuel tank and communicates with the second pipeline through a third pipeline. Therefore, water injection and water drainage of the tall and large fuel tank without a bottom outlet are achieved, water injection and water drainage are achieved through a common pipeline, and the water injection and drainage system is more convenient to install. Meanwhile, the first pipeline is fixed through an auxiliary structure beside the fuel tank, so that the fuel-free tank can be prevented from being damaged and can be reused; and meanwhile, the problem of physical suction stroke limit of a ground self-priming pump is avoided, so that water in the fuel tank can be effectively discharged.

Provided are an aftertreatment device capable of purifying exhaust gas with a compact configuration and an engine including the aftertreatment device. An aftertreatment device includes: a first case that is a DPF case; a second case that is an SCR case; an exhaust connection pipe that connects the first case and the second case; a mixer arranged at an upstream end of the exhaust connection pipe in a flow direction of exhaust gas; and a urea water injection portion that injects urea water into the mixer.

The application relates to a gasoline engine structure and a water injection control method, which are characterized by comprising an engine cylinder body (1), an air intake manifold (2), an exhaust manifold (3), a spark plug (4), an oil injector (6) and a water injection mechanism which is connected with a controller (9), wherein the engine cylinder body (1) is provided with a piston (11), and the engine cylinder body (1) is provided with a cylinder pressure sensor and a water temperature sensor. The engine operation state is detected through the sensors arranged in the engine, the water injection amount, the water injection interval and the water injection time can be flexibly controlled, the water injection parameters are adjusted, the water injection amount is matched with the load of the engine, and the thermal efficiency of the engine is improved. Compared with the prior art, the strategy of multiple water injection is adopted to reduce the water injection penetration distance, the water injection atomization effect is strengthened, and the top of the piston is better covered with a liquid water film and water mist, so that the heat insulation effect is effectively achieved.

The application discloses a back-liquid-preventing and air-bubble-preventing fire engine tank body, which comprises a box body, a liquid suction pipe and a back-liquid-preventing and air-bubble-preventing liquid injection device. The liquid suction pipe is arranged at the bottom of the box body, and the back-liquid-preventing and air-bubble-preventing liquid injection device is arranged in the box body and is at least one. The back-liquid-preventing and air-bubble-preventing liquid injection device comprises a liquid injection cage, an upper liquid injection port is in a tubular structure, one end of the upper liquid injection port is communicated with the outside of the box body, the other end of the upper liquid injection port extends from the inside of the liquid injection cage to the top of the liquid injection cage, a plurality of liquid blocking balls are arranged in the liquid injection cage, the density of the liquid blocking balls is smaller than the density of water, the upper liquid injection port is located at one end of the top and faces the liquid blocking balls, a maintenance door is arranged on one side surface of the liquid injection cage in the box body, and the wall surfaces of the liquid injection cage and the maintenance door are both provided with dense holes. The independent gas-liquid separation space is arranged in the limited space, so that the bubbles generated by water injection have enough space to escape, and the air content of the water finally sucked into the pump is reduced. The overall water flow fluctuation in the tank is reduced, and the fire water suction performance is stable.

This invention discloses an engine water injection system based on throttle opening control, including a sensor unit for detecting engine temperature and throttle opening; an electronic control unit for sending corresponding control signals to the water injection unit based on the detected engine temperature and throttle opening; the water injection unit includes a water tank storing coolant, with the water tank's outlet connected to the intake manifold via a water supply pipe, a water pump driving the coolant into the intake manifold on the water supply pipe, and a nozzle at the water supply pipe's outlet. This invention uses the sensor unit to collect engine temperature and throttle opening parameters in real time, and the electronic control unit dynamically adjusts the start / stop timing and atomization intensity of the water injection unit, thereby precisely controlling the water injection volume. This suppresses nitrogen oxide generation while avoiding resource waste under low-temperature conditions, achieving the dual effects of improved exhaust gas treatment efficiency and energy saving and emission reduction.

The invention discloses an engine water spraying system, a control method and related devices, and relates to the field of engines, the engine water spraying system comprises a water supply device, a water spraying device, a water spraying parameter acquisition device and a controller, the water supply device comprises a water tank, a water pump set and a plurality of channel control valves arranged on a water tank channel and a water pump set channel; the water spraying device comprises a nozzle and a water spraying control valve, and the controller is connected with the channel control valves, the water spraying control valve and the water spraying parameter collecting device and controls the water spraying parameters according to the size relation between the engine water spraying requirement corresponding to the engine load under the current operation working condition and the water spraying parameters collected by the water spraying parameter collecting device. And controlling the corresponding passage control valves to be opened or closed, switching the water pump group to a corresponding operation mode, and controlling the water spray control valves to be opened so as to pressurize water in the water tank and convey the water to the nozzles. According to different engine loads, the running modes of the water pump set can be switched in a self-adaptive mode, and it is ensured that the engine can obtain the optimal cooling effect under different working conditions.

The invention relates to the field of straightening and forming of bimetal composite plates, in particular to a straightening method and device for a large-yield-ratio metal composite plate assisted by resistance wire induction heating. The problems that due to the fact that two materials of the bimetal composite plate are large in mechanical property difference and uneven in residual stress distribution, the straightening difficulty is large, layering is prone to occurring, and secondary deformation is prone to occurring after straightening are solved. The device comprises a resistance wire induction heating module controlled by a mechanical arm, a water cooling temperature control module connected with a water injection pipe, a multi-roller straightening module and a conveying belt conveying module, the resistance wire induction heating module is connected to engines on the two sides of a working platform through the mechanical arm, and the water cooling temperature control module is arranged below the working platform; the straightening module is connected to the rear portion of the working platform through a connecting frame and screws, and the conveying module covers the working platform through a conveying belt. According to the main operation process of the device, the low-plasticity face of the bimetal composite plate is heated through the resistance wire, water cooling is conducted on the high-plasticity face of the bimetal composite plate, after the needed temperature is reached, the bimetal composite plate is conveyed to the subsequent straightening module through the conveying module, and the straightening process is completed.

The utility model relates to the technical field of steam engines, in particular to a steam inner machine container assembly which comprises a steam inner container, the lower surface of the steam inner container is communicated with a water inlet pipe, an auxiliary water tank is installed on the side face of the steam inner container, and the side, away from the water inlet pipe, of the steam inner container is communicated with an air outlet pipe. Four mounting plates are fixedly connected to the surface of the steam inner container, a cleaning device is arranged in the steam inner container and comprises a fixing plate, the fixing plate is fixedly connected to the inner wall of the steam inner container, a rotating disc is rotatably connected to the inner wall of the fixing plate, a scraper is fixedly connected to the lower surface of the rotating disc, and a water inlet is formed in the lower surface of the scraper. And the scraping plate is propped against the inner wall of the water inlet pipe. The steam inner machine container assembly solves the problems that in the long-term using process of the steam inner machine container assembly, due to the fact that water usually contains calcium, magnesium and other elements, water is not treated when the steam inner machine container assembly is used, scale is often generated in a steam inner container, and the water injection efficiency of the steam inner container is affected.

The present application relates to a kind of attitude control engine high-altitude simulation test system cooling performance index analysis and calculation method, mainly solve the technical problems that existing analysis method is prone to cause the large deviation between test result and actual situation.The method first analyzes the basic relationship between cooling water evaporation and gas cooling in cooling process, then sets the gas cooling target value, then in turn calculates the mass fraction of each gas component, the average constant-pressure heat capacity of gas inlet and outlet, the total heat exchange of gas cooling process, the heat absorbed by cooling water in cooling process, the theoretical water injection of cooling water in cooling process, finally, the actual water injection of cooling water in cooling process is obtained by combining safety factor calculation, so as to complete the analysis and calculation of attitude control engine high-altitude simulation test system cooling performance index, ensure the inlet temperature requirement of injection system, and the stability and reliability of test system.

The invention discloses an amphibious aircraft fire extinguishing task system indication conformance test flight method, which comprises the following steps: S1, injecting water into the ground of an airport, and checking the takeoff weight of an aircraft to meet the requirements; s2, switching on a power supply of the test system, starting an engine according to a normal program, checking the working condition of each system, and confirming that each system of the airplane works normally; s3, checking a neutral position and a limit position of three-way control, and sliding out after confirming that the neutral position and the limit position are normal; s4, carrying out water surface sliding water drawing test flight and fire extinguishing task system test flight; s5, landing; and S6, braking and dehumidifying. According to the method, while the sailing safety and reliability of airworthiness evidence obtaining are met, the test flight risk is considered, the unit safety is guaranteed, the test flight verification can be efficiently carried out, and the method has important significance for improving the test flight efficiency.