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

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 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 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 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.

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.

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.

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 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 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.

The invention discloses a control method and system for self-adaptively adjusting hydrogen combustion, belongs to the technical field of internal combustion engine control, and solves the technical problem of abnormal combustion phenomena of preignition and knocking. The method comprises the steps that the exhaust valve is controlled to be closed in advance, the negative valve overlap angle is achieved, part of waste gas is internally recirculated, water spraying of the air inlet channel is controlled in a coupled mode, and therefore the too high hydrogen combustion rate is restrained, the ignition delay period is prolonged, and the knocking and preignition probability is reduced. Specifically, the engine load is obtained in real time; when the load of the engine is larger than or equal to 10% and smaller than 40%, the working condition is a medium and small load working condition, the ignition delay period is prolonged only by controlling an exhaust valve to close intercepted waste gas in advance, and meanwhile the hydrogen preignition phenomenon is relieved; when the load of the engine is larger than 40% and smaller than or equal to 100%, the working condition is a large-load working condition, on the basis that an exhaust valve is controlled to be closed in advance, the temperature in the cylinders of the internal combustion engine is reduced by controlling water sprayed into each air cylinder, and therefore the conditions of preignition and detonation of the internal combustion engine are eliminated.

The present application provides a control device and a control method of an internal combustion engine. The control device of the internal combustion engine is configured to execute a first injection process of causing a water injection valve to inject water during an open period of an intake valve, and a second injection process of causing the water injection valve to inject water during a close period of the intake valve. The control device is further configured to increase a pressure of water supplied to the water injection valve in the second injection process, as compared with the first injection process.

The utility model provides an outboard engine starting performance detection device, and belongs to the technical field of engine testing. The outboard motor starting performance detection device comprises a frame, walking wheels are arranged at the bottom of the frame, the frame is provided with a water tank used for containing water so that a propeller of the outboard motor can stretch into the water tank, the frame comprises a hanging frame which is higher than the water tank so that a bracket of the outboard motor can be hung and fixed, and the hanging frame is located on at least one side of the water tank. The frame further comprises a handle which is held by an operator to push the frame and the water tank to walk and move, a drainage hole is formed in the bottom of the water tank, and a valve is installed at the drainage hole. By the adoption of the detection device, pits do not need to be dug in the ground, other machines do not need to be used for transferring the outboard motor, operation is more convenient, detection efficiency is higher, and water injection and water drainage are quite convenient.

This application provides a fuel injector and its control method, as well as a vehicle. The fuel injector includes a body and a water inlet. The body contains a fuel passage and an air-water passage, and has an injection port and a water injection port. The inlet of the fuel passage connects to a fuel supply system, and the outlet of the fuel passage communicates with the injection port. The body also includes an injection valve assembly connected to the fuel passage, which controls the opening and closing of the fuel passage. The inlet of the air-water passage connects to an air source, and the outlet of the air-water passage communicates with a water injection port. The water inlet is located on the body and contains a water injection passage. One end of the water injection passage connects to a water supply system, and the other end communicates with the air-water passage to inject water into the air-water passage, causing air-liquid mixing. The water inlet includes a water injection valve assembly, which controls the opening and closing of the water injection passage. The fuel injector of this application simultaneously functions as both water and fuel injection, effectively meeting the needs of various complex engine operating conditions.

The utility model belongs to the technical field of heat supply engineering, and particularly relates to a heat supply engineering waste heat recycling device which comprises a recycling tank, electromagnetic valves, a rotary connector and a motor, a water injection pipe is fixedly communicated with the upper left portion of the recycling tank, a water drainage pipe is fixedly communicated with the lower right portion of the recycling tank, and the electromagnetic valves are installed on the water drainage pipe and the water injection pipe. A first recycling assembly is arranged in the center of the inner side of the recycling tank, a second recycling assembly is arranged on the outer side of the first recycling assembly, a support is fixed to the outer wall of the left side of the recycling tank, a connecting and guiding pipe is fixedly installed at the top end of the support, a motor is fixedly installed on the outer wall of the left side of the recycling tank, and the output end of the motor is fixedly connected with a second gear. According to the utility model, the heat can be fully absorbed, the heat recovery utilization rate is higher, and the water in the recovery tank can be stirred, so that the water can be uniformly and quickly heated.

The utility model relates to the technical field of oil and gas field exploration logging engineering equipment, in particular to a device for calculating the gas content of a rock core. The device for calculating the gas content of the rock core comprises a main body and a cover body which are buckled with each other, the main body is of a groove-shaped structure, a water outlet is formed in the side wall of the bottom of the main body, and a bracket for placing a rock core is arranged in the main body; the cover body is provided with a water injection port and a gas collection port which are communicated with each other, and the gas collection port is externally connected with gas collection equipment; the side wall of the main body is a visual window, and a graduated scale is arranged on the visual window. The utility model provides a device for calculating the gas content of a rock core, which can realize the controllability and integrity rate of observation of the rock core out of a cylinder, reduce data deviation, is low in equipment cost, meets the design coring requirement while meeting the field coring requirement, can replace the detection of part of special items, and saves the production cost.

The invention discloses a control method of a compression ignition type hydrogen-diesel mixed combustion single-cylinder engine system, and belongs to the technical field of compression ignition type engines. The engine system comprises a cylinder cover matched with a cylinder sleeve of an engine, an air inlet system, a diesel oil supply system, a hydrogen supply system, a cooling system and an electric control system. A high-pressure air storage tank of the air inlet system is connected with an air inlet channel in the cylinder cover through a pipeline. A hydrogen spraying device of the hydrogen supply system is arranged on the cylinder cover and communicated with the combustion chamber, and a hydrogen spraying hole of the hydrogen spraying device is communicated with an inner cavity of the hydrogen spraying device through a spiral air channel arranged in the air outlet end of the hydrogen spraying device; a water spraying valve of the water spraying system is communicated with an air inlet pipeline of the air inlet system. And the cooling system is a forced circulation cooling system. The injection timing and pulse width of diesel oil, hydrogen and water, the air inlet pressure and flow, the optimal cooling temperature of a cooling medium and the like are controlled on line through an electric control system. The hydrogen replacement rate can be increased, knocking can be reduced, and the engine efficiency can be improved.

The invention relates to a control method of a tilting device suitable for a stable navigation attitude of a small unmanned ship, and belongs to the technical field of ship control. The method comprises the following steps: identifying discretization model parameters of an execution mechanism and a hull attitude through a preset test; collecting a trim angle, a roll angle, a tipping angle and a rudder angle in real time; predicting a future attitude trend based on the model by using a generalized prediction algorithm and generating a preliminary control quantity; the fine adjustment amount is calculated through a PID controller; superposing the decoupling feedforward quantity to obtain a comprehensive instruction; the final angle control quantity is output after dynamic model compensation of the executing mechanism, the tipping bucket and the steering engine are driven to adjust the angle of the water injection nozzle, and attitude closed-loop stable control is achieved. According to the invention, high-precision decoupling control of trim and roll motion is realized, the response is fast, the method adapts to complex sea conditions, and the stability of a load platform during high-speed navigation of the unmanned ship is obviously improved.

Methods for an internal combustion engine, comprising: Injecting a larger proportion of water upstream than downstream of an intercooler while the cooler is operating in a heating mode; and Injecting a larger proportion of water downstream than upstream of the charge air cooler while the cooler is operating in a cooling mode.

An engine and a control method therefor, a vehicle, and a storage medium. The engine comprises an engine body and a first water injector. The engine body is internally provided with a combustion chamber and a pre-combustion chamber. The combustion chamber encloses to define a combustion cavity, and the pre-combustion chamber is located in the combustion cavity. The first water injector is located outside the pre-combustion chamber and inside the combustion cavity. The pre-combustion chamber is located in a water injection direction of the first water injector, and the first water injector is configured to inject water into the pre-combustion chamber.

The application discloses a fuel supply system for a marine methanol engine test bench, which comprises a methanol tank, a fuel pressurizing device, a pressure regulating device, a water injection unit, a temperature regulating heat exchanger, a gas permeation device, a purging device and a PLC controller, the output end of the methanol tank is sequentially connected with the fuel pressurizing device, the pressure regulating device, the water injection unit and the temperature regulating heat exchanger, and the backflow ends of two test benches are respectively connected with the backflow end of the methanol tank. The backflow port A of the pressure regulating device is connected with the backflow end of the methanol tank, the double-wall pipes connected with the water injection unit and the temperature regulating heat exchanger are respectively connected with the gas permeation device and the purging device in parallel, and the output ends of the temperature regulating heat exchanger are respectively connected with the two test benches. The application has the advantages of compact structure, convenient operation, high automation degree, good integration degree, good universality, and the ability to simultaneously meet the fuel supply requirements of marine methanol medium-speed engines and marine methanol low-speed engines, and the test efficiency of the marine methanol engine is significantly improved.

The invention belongs to the field of emergency rescue, and particularly relates to a fire-extinguishing aircraft engine non-shutdown water injection method which comprises the following steps: an aircraft slides to a specified position and is adjusted to a slow vehicle, a water injection mode and water injection amount are set on the aircraft through an aircraft water injection control system, ground personnel connect pipelines according to a specified route and inject water, and after water injection is completed, the fire-extinguishing aircraft engine is started. And dismantling the pipeline and evacuating. According to the invention, the fire extinguishing medium can be supplemented under the condition of not shutting down the aircraft, so that the time of traditional shutting down water injection is greatly shortened, and the operation efficiency of the aircraft when executing a fire extinguishing task is improved.

The internal combustion engine in-cylinder direct injection dry steam system comprises a single-cylinder engine, the single-cylinder engine comprises an air cylinder, a piston and a power module, and a combustion chamber is arranged between the piston and the top of the air cylinder; the fuel injection system comprises a fuel supply module and a fuel injector; the water vapor injection system comprises a water vapor generation module, a water vapor in-cylinder direct injection module and a flash tank; the tail heat recovery system comprises a first-stage tail heat recovery module and a second-stage tail heat recovery module; the water vapor generation module is connected with the first-stage tail heat recovery module and the second-stage tail heat recovery module; and a data acquisition and control system. According to the invention, engine tail gas grading waste heat can be recovered and converted into in-cylinder steam with controllable dryness, dry steam / fuel oil double injection is realized through an in-cylinder direct injection technology, and the problems of wall wetting and engine oil emulsification caused by a water injection technology are effectively solved.

The invention discloses an anti-explosion control method and system for hydrogen-water double-spraying combustion of an HCNG engine. The control method comprises the steps that the rotating speed of the engine and the valve lift are obtained to determine working conditions; inquiring preset parameters to adjust the engine; through monitoring of a knock sensor, hydrogen / water injection timing, ignition timing, the EGR rate and the water injection pulse width are sequentially adjusted to suppress explosion; judging the power, and if not, adjusting the air inflow, the hydrogen doping ratio and the like; and finally updating parameters, and circularly judging the next working condition. The mode of'natural gas-air-EGR out-cylinder premixing + hydrogen in-cylinder direct injection + water in-cylinder direct injection 'is adopted, accurate regulation and control and efficient stratified combustion of fuel are achieved, the hydrogen fuel utilization rate is increased, and the circulation change rate is reduced. For anti-detonation, five-stage progressive closed-loop control is constructed, detonation intensity is taken as a criterion, water spraying cooling is preferentially carried out, EGR dilution and water spraying increment assistance are carried out when necessary, high-hydrogen-doping-ratio operation is guaranteed, NOx emission is reduced, and collaborative optimization of anti-detonation performance, dynamic performance and low emission is achieved.