112 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 utility model relates to a hydrogen purification device which comprises an impurity removal device, a water removal device and a base, a second breather pipe on the upper right portion of the impurity removal device penetrates through a pipeline notch in the lower left side of the water removal device to enter the water removal device, the impurity removal device and the water removal device are fixed on the base, and a water injection hole is formed in the upper left portion of the impurity removal device. The water removal device is provided with a shell, and the left side of the impurity removal device is provided with a third ventilation pipe, a sulfuric acid injection port and a sulfuric acid outlet from top to bottom. The engine drives the stirring shaft, the stirring blades, the water inlet and the water outlet to cooperate with each other to improve the impurity removal rate, and the first air suction fan and the second air suction fan cooperate with the second breather pipe and the third breather pipe, so that the hydrogen collection rate is improved while the hydrogen collection is more sufficient and thorough. Conditions of concentrated sulfuric acid and the second breather pipe are observed through the visible port, and the situation that water contained in hydrogen is not removed due to the fact that the second breather pipe is not immersed by the concentrated sulfuric acid is prevented.

The invention discloses a multi-process combined fracturing transformation method for avoiding a water injection layer series, which comprises the following specific steps of: 1, comprehensively logging and logging to explain the condition of an oil-water layer and the characteristics of fracturing transformation, classifying and grading a horizontal section, and determining an engineering dessert; 2, differentiated cloth seam design is carried out according to the engineering dessert distribution in the step 1; step 3, determining design parameters of the horizontal well according to the position of the engineering dessert of the horizontal section and the seam distribution mode; 4, different types of perforation technologies are selected according to the design parameters in the step 3; 5, fracturing operation is conducted according to the perforation technology determined in the step 4; and step 6, monitoring the fracturing operation process in real time by adopting underground microseism, adjusting design parameters, and guiding fracturing construction. According to the fracturing transformation method for avoiding the water injection layer series through the multi-process combination, the design parameters of the horizontal well are adjusted, different perforation technologies are selected for fracturing operation, and communication of the water injection development layer series or the water drive front edge is effectively avoided.

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 present invention belongs to the field of petroleum engineering technology, and in particular relates to an oilfield booster water injection device, comprising a base, a booster water injector mounted on the base, a bracket connected to the base, a dual-channel filtering mechanism provided on the bracket, and an injection pipe connected to the water outlet of the booster water injector via a plug. The plug is provided to automatically connect the injection pipe to the booster water injector when the booster water injector supplies high-pressure water, and to automatically cut off the connection between the injection pipe and the booster water injector when the booster water injector stops supplying high-pressure water. This prevents the potential risk of water backwashing in the injection pipe when the booster water injector stops supplying high-pressure water, avoids backwashing of high-pressure oil in the oilfield, and significantly improves stability and safety.

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 a central water injection type water ramjet engine which comprises a front end socket, a combustion chamber, a rear end socket, an afterburning chamber and a spray pipe which are connected in sequence. The front explosive blocking ring is arranged at the position of the front sealing head, the rear explosive blocking ring is assembled on a boss of the rear sealing head, the combustion chamber is filled with the propellant grain, the jetting assembly is arranged on the central axis in the combustion chamber, and the ignition assembly is arranged at the position of an ignition connector of the rear sealing head. The engine is integrally assembled in the underwater navigation body to serve as a propelling system. The central injection assembly is adopted, the structure is simple, installation is easy, and the manufacturing cost is reduced; water is directly injected into the center of the combustion chamber through central water injection, so that the water and fuel can be rapidly mixed, the reaction is more sufficient, and the combustion efficiency can be greatly improved.

A method of operating a water injection system for a combustion engine, the system comprising an injector for injecting water at least indirectly into the combustion engine and a pump for pumping water from a tank through a feed line to the injector. In order to improve the dynamic performance of a water injection system for a combustion engine, the invention provides that the method comprises the steps of:determining if there is a current demand for water injection;if there is no current demand, checking at least one predefined standby condition to determine if, starting from a current pump performance, it is possible to meet a potential future demand for water injection; andincreasing the pump performance if at least one standby condition is fulfilled anddecreasing or deactivating the pump if no standby conditions are fulfilled.

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 present invention provides a method for controlling cloud parameters in aircraft engine intake icing environment simulation tests, characterized by the following steps: S1: establishing the effects of spray system water pressure and air pressure on average water droplet diameter; S2: calculating the effects of altitude simulation parameters and wind speed on average water droplet diameter; S3: coupling analysis of liquid water content parameters with intake and exhaust parameters to calculate the required water injection volume; S4: employing a unidirectional air supply system to achieve precise control of the spray system air pressure; and S5: employing a circulating water supply system to achieve stable control of the spray system water pressure. By collaboratively controlling the spray system and the intake and exhaust systems, this method significantly improves the accuracy of icing environment simulation, providing more reliable test conditions for aircraft engine intake icing tests. The method is particularly suitable for simulating cloud fields under complex environmental parameters (such as high wind speed and low air pressure).

The present invention relates to the field of engine testing technology, and in particular to a cleaning device for an engine air intake regulation system. The cleaning device for an engine air intake regulation system comprises: a cleaning tank, a steam generator, a first solenoid valve, and a hardness tester. The steam generator is provided with a water inlet pipe and a water injection pipe. The water inlet pipe is connected to the cleaning tank, and the water injection pipe is used to inject steam water. The first solenoid valve is provided between the water inlet pipe and the cleaning tank, and the first solenoid valve is used to open or close the water inlet pipe. The hardness tester is provided in the steam generator, and the hardness tester is used to detect the hardness of the water in the steam generator. By providing the hardness tester, the water quality of the steam water can be monitored in real time. When the hardness of the steam water reaches a specified value, the first solenoid valve opens simultaneously, injecting cleaning fluid into the steam generator to clean the scale in the steam generator and prevent scale deposition.

The utility model discloses a petroleum engineering water injection pipe inner wall cleaning device, which relates to the technical field of petroleum engineering, and comprises a box body, a depth adjusting assembly is arranged on one side of the box body, a diameter adjusting assembly is arranged on the other side of the depth adjusting assembly, a flushing assembly is arranged in the box body, and the depth adjusting assembly comprises a bottom plate fixed on one side of the box body. A groove is formed in the bottom plate, an air cylinder is arranged in the groove in the bottom plate, fixing blocks are arranged on the front side and the rear side of the bottom plate, connecting rods are arranged between the fixing blocks, a fixing shaft is arranged between one set of connecting rods, the air cylinder is matched with the fixing shaft, a rotating shaft is arranged between the connecting rods, and connecting rods are arranged between the adjacent connecting rods. The water injection pipe cleaning device has the beneficial effects that through the arrangement of the diameter adjusting assembly and the depth adjusting assembly, the diameter adjusting assembly can clean water injection pipes with different diameters, the depth adjusting assembly can clean water injection pipes with different depths, the combination of the diameter adjusting assembly and the depth adjusting assembly can adapt to the water injection pipes with different sizes, and unnecessary damage to the water injection pipes is avoided.

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.

A sparked reciprocating four-stroke internal combustion hydrogen-fueled engine having a casing, a rotatable crankshaft, a cylinder inside the casing, a piston inside the cylinder to movably reciprocate along an axis between top and bottom dead center positions (TDC, BDC) and operatively connected to the crankshaft such that the piston imparts a rotational movement to the crankshaft, a combustion chamber within the cylinder between the engine casing and piston head opposite the crankshaft, intake and exhaust valves, hydrogen and water injectors; a spark or glow plug, and an engine control unit to control timing and quantity of hydrogen and water injections by injecting into the combustion chamber first, second, and third quantities of hydrogen at first, second, and third timings, respectively, from 20° before TDC during compression stroke to 20° after TDC, from 110° to 90° before TDC during compression stroke and from 180° to 100° before TDC during compression stroke.

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.

A method for controlling the water injection amount of a jet pre-cooled engine combined with trajectory optimization, which relates to a jet pre-cooled turbine engine. It includes: 1) Establishing an aircraft dynamics model: Considering the trajectory characteristics of the aircraft in the vertical plane climbing section, regarding the aircraft as a particle model moving in the vertical plane, and establishing a state differential equation about various state parameters; 2) Establishing an engine model: Assuming the relative corrected speed N of the compressor Cor , the dimensionless parameter β of the compressor characteristic C and the dimensionless parameter β of the turbine characteristic T Three unknowns, by constructing an inlet and outlet matching balance equation, solve the equilibrium state and performance parameters of the engine; 3) Establishing a trajectory optimization method: Using trajectory optimization software, setting the state variables and differential equations, control variables and evaluation indexes during the flight to comprehensively evaluate and optimize the flight route and flight control, and according to the optimal result, output the optimal control law of jet pre-cooling based on the optimal trajectory to improve the comprehensive performance of the engine.

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.

Provided are an engine and a method for diagnosing an engine with which NOx sensor failure can be diagnosed with greater accuracy.　This engine is configured such that: a NOx sensor failure diagnosis operation S103 accompanied by a DPF regeneration process, EGR stoppage, and urea water injection stoppage is performed under the control of an electronic control device; and detection data for a pair of NOx concentrations J, K detected by a pair of NOx sensors in the NOx sensor failure diagnosis operation are transmitted S105 to an engine diagnosis tool with which the failure diagnosis for the pair of NOx sensors S108 is performed on the basis of the detection data, said engine diagnosis tool being situated outside the engine. In this engine diagnosis method, the failure diagnosis for the NOx sensors S108 is performed by the engine diagnosis tool on the basis of detection data transmitted from the engine.

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.

The present invention relates to the field of environmental protection and energy conservation, and more particularly to a device and method for extracting heat from engine waste heat. The device comprises: a control circuit, a water injection assembly, a heat exchange assembly, and a dedicated heating pot. The water outlet of the water injection assembly is connected to the water inlet of the heat exchange assembly; the control circuit is connected to the water injection assembly and a temperature sensor of the heat exchange assembly, and controls the water injection assembly to inject drinking water into the heat exchange assembly based on the temperature of the heat exchange assembly; the temperature sensor is connected to the heat exchange assembly to obtain the temperature value of the heat exchange assembly; and the heat exchange assembly is connected to the dedicated heating pot via a high-temperature resistant hose to provide high-temperature steam to the dedicated heating pot. The device extracts waste heat from the exhaust pipe of an operating vehicle or marine engine, automatically and intelligently heating food, which is more environmentally friendly and energy-saving. It can also achieve fully automatic cooking of food without human intervention.