13 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.

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.

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.

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.

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.

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.

This invention belongs to the field of underwater engine testing, and specifically relates to an underwater engine testing system. To test engine parameters in water depths of hundreds of meters, this invention proposes an underwater engine testing system. The system includes a test water chamber and a pressure equalization water chamber forming a communicating vessel, a control module, a water injection module, and an air injection module. The pressure equalization water chamber is equipped with a first vent valve. After engine ignition, the control module controls the opening of the first vent valve when the gas pressure in the pressure equalization water chamber exceeds the pressure corresponding to the test water depth. Utilizing the principle of communicating vessels and the incompressibility of liquids, during testing, the engine's underwater environment at depths of hundreds of meters can be simulated by controlling the injected air pressure. Simultaneously, after engine ignition, venting occurs on the pressure equalization water chamber side, ensuring relatively stable water pressure on the engine.

The application discloses a kind of unequal distance stroke inertia reset high-efficiency internal combustion engine, belong to internal combustion engine technical field.This internal combustion engine is without inertia component such as crankshaft, flywheel, including at least two groups of piston power unit, power output mechanism, piston reset system, ignition and gas distribution system and water injection secondary power cooling system;Piston two ends are equipped with force transmission structure to realize bidirectional stress movement, power output mechanism is equipped with power output disengaging device to control power on-off, each group of piston is mechanically linked by piston reset system, and one group of piston power stroke drives another group of piston reset;Piston is asymmetric unequal distance structure, long end power, short end reset, power end low speed reset, ignition and gas distribution system burns at fixed point position in short end, and water injection system realizes secondary power in long end high temperature area.This application reduces the inertia loss of traditional internal combustion engine from structure, effectively improves power-on ratio, is compact in structure, runs smoothly, is flexible in arrangement, and is suitable for various internal combustion engine scenes.

The present application relates to the technical fields of energy conversion and energy saving, and discloses a gas-water flash power device, which comprises a body assembly, a positioning installation groove is formed on the top surface of the body assembly, a cylinder sleeve is installed in the positioning installation groove, and a working piston is movably installed in the cylinder sleeve. The present application introduces external industrial waste heat as a heat source, preheats the intake air and water injection, and realizes efficient power output. The present application optimizes the design of the body assembly, the crankshaft, the connecting rod, the valve timing and the high-pressure water injection system, and solves technical problems such as hydraulic lock cylinder, fouling and corrosion. The thermal efficiency is 30-40%, the device can be continuously operated for 24 hours, the overhaul life is greater than or equal to 20,000 hours. The whole device is manufactured by using mature internal combustion engine technology, has low cost and is easy to maintain, and can be widely used in waste heat recovery and utilization in high-energy-consuming industries such as steel, chemical industry, cement and power plant. The investment recovery period is about 2-3 years, and the device has significant environmental protection value and economic benefits.

Power engine process, which includes the following: Selective deactivation of one or more engine cylinders via deactivatable fuel injectors during a transmission event; and during cylinder deactivation, injection of water into the one or more deactivated engine cylinders to reduce the oxygenation of a first exhaust catalyst, wherein, during cylinder deactivation, the injection of water into the one or more cylinders includes the injection of water into the one or more cylinders in response to a number of water injection cycles exceeding a threshold.

An ammonia treatment system for an ammonia engine is disclosed. According to one embodiment of the present invention, the ammonia treatment system for an ammonia engine comprises: an ammonia engine; an ammonia supply unit for supplying ammonia to the ammonia engine; an ammonia recovery unit for recovering ammonia from the ammonia engine; an ammonia water generation unit for generating ammonia water from the ammonia gas provided by the ammonia recovery unit; an ammonia water injection unit that injects ammonia water into the exhaust gas; and a nitrogen oxide reduction unit that removes nitrogen oxide from the exhaust gas mixed with the ammonia water.