CN115962070A - High-concentration high-stability premixed fuel preparation and supply system and control method - Google Patents
High-concentration high-stability premixed fuel preparation and supply system and control method Download PDFInfo
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Abstract
The invention is suitable for the technical field of pretreatment of engine fuels, and provides a preparation and supply system and a control method for high-concentration and high-stability premixed fuels. According to the invention, the bulk micro-nano scale bubble flow premixed fuel is prepared under a high-pressure environment, the micro-nano scale bubble particle size is more concentrated, the stability is greatly improved, the premixing of the fuel and air is realized, and the concentration and the stability of the micro-nano bubbles are effectively improved.
Description
Technical Field
The invention belongs to the technical field of pretreatment of engine fuels, and particularly relates to a preparation and supply system and a control method of a high-concentration high-stability premixed fuel.
Background
With the development of the subject fields of interface, nanoscience, etc., from the beginning of the 21 st century, nanoscale bubble flow receives more and more attention and applications from different fields year by year. Bulk phase micro-nano scale bubble-like flow fuel is hydrocarbon fuel which can stably suspend and contain a plurality of bubbles with the diameter of less than 1 mu m. The bulk phase micro-nano scale bubble flow fuel has the characteristics of high gas phase specific surface area, high discrete gas phase stability, self-pressurization solubility, high gas phase dissolution rate, hydroxyl radical excitation and the like. The single atomization mixing mode of oil gas in a combustion chamber is broken through while the fuel is modified, and then the improvement of the thermal efficiency and the reduction of the discharged pollutants are realized.
Because a large amount of bulk phase micro-nano scale bubbles exist in the premixed fuel, after the fuel is sprayed into the cylinder, the bubbles are separated out and broken due to pressure transient, and the micro-explosion effect occurs, so that the spray cone angle of the fuel is increased, the spray penetration distance is reduced, the radial length of the middle section of spray jet flow is increased, the oil gas distribution in the cylinder is uniform, the uniformity of mixed gas is effectively improved, and the improvement of the thermal efficiency of an engine and the reduction of incomplete combustion emissions are realized. However, at present, a preparation and supply system of bulk micro-nano scale bubble flow premixed fuel is still in laboratory bench test research, and the problems of low and uneven bubble concentration in the premixed fuel, large and uncontrollable bubble particle size span, low bubble preparation efficiency, unstable supply system and the like exist.
Disclosure of Invention
The present invention aims to provide a system for preparing and supplying a high-concentration and high-stability premixed fuel and a control method thereof, and aims to solve the problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-concentration high-stability premixed fuel preparation supply system comprising:
the system comprises an oil tank, a fuel filter, a three-way valve I, a gas filter, a high-pressure gas source, a constant booster oil pump, a high-pressure environment Venturi type bulk micro-nano scale bubble-shaped flow premixed fuel preparation tank, a high-pressure environment porous membrane tube type bulk micro-nano scale bubble-shaped flow premixed fuel preparation tank, a high-pressure oil pump, a booster air pump, an engine combustion chamber, an oil rail pressure sensor, a high-pressure oil rail, an oil injector, an electronic control unit, a three-way valve II, a one-way electromagnetic pressure reducing valve I, a one-way electromagnetic pressure reducing valve II and a one-way electromagnetic valve.
Further, the high-pressure environment Venturi type bulk micro-nano scale bubble flow premixing fuel preparation tank comprises a fixing bolt I, an air inlet pipe I, an oil inlet I, a Venturi type micro-nano bubble generator, a pressure sensor I, a liquid level height sensor I, an air inlet II and an oil outlet I; the first oil inlet is connected with an oil outlet of the constant pressure oil pump; the first air inlet is connected with an outlet of the air filter; and the second air inlet is connected with the outlet of the booster air pump.
Further, the high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixing fuel preparation tank comprises a fixing bolt II, an air inlet pipe II, an air inlet pressure gauge, a micro-nano scale porous membrane tube, a filtering membrane, an oil inlet II, a pressure sensor II, a liquid level height sensor II, an air leakage opening and an oil outlet II; the second air inlet pipe is connected with an air outlet of the air filter; the oil inlet II is connected with the oil outlet I; the air leakage port is connected with an inlet of the pressurization air pump; and the second oil outlet is connected with an inlet of the high-pressure oil pump.
Further, in terms of oil path connection, the oil tank outlet is connected with the fuel filter inlet; the outlet of the fuel filter is connected with the inlet of a three-way valve; an outlet of the three-way valve is connected with an inlet of the constant pressure oil pump; the outlet of the constant pressure oil pump is connected with the first oil inlet; the first oil outlet is connected with the second oil inlet; the second oil outlet is connected with an inlet of the high-pressure oil pump; the outlet of the high-pressure oil pump is connected with the inlet valve of the high-pressure oil rail; the outlet of the high-pressure oil rail is connected with the inlet of the oil injector, and the oil drainage port of the high-pressure oil rail is connected with the inlet of the second three-way valve through a one-way electromagnetic pressure limiting valve; the oil return port of the oil injector is connected with the inlet of the second three-way valve; the outlet of the second three-way valve is connected with the inlet of the first three-way valve; the fuel injector is connected with a combustion chamber of the engine;
in the aspect of gas path connection, the high-pressure gas source outlet is connected with the inlet of the gas filter; the outlet of the gas filter is connected with a first gas inlet through a one-way electromagnetic pressure reducing valve, and is connected with a second gas inlet pipe of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixed fuel preparation tank through a one-way electromagnetic pressure reducing valve; the air outlet of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-like flow premixed fuel preparation tank is connected with the air inlet of the booster pump; the air outlet of the booster air pump is connected with the air inlet II;
in the aspect of signal connection, the input end of the electronic control unit is respectively connected with the first pressure sensor, the first liquid level sensor, the second pressure sensor and the second liquid level sensor, and the output end of the electronic control unit is respectively connected with the air compressor, the constant pressure boosting oil pump, the high-pressure oil pump, the oil injector, the one-way electromagnetic pressure limiting valve, the first one-way electromagnetic pressure reducing valve, the second one-way electromagnetic pressure reducing valve and the one-way electromagnetic valve.
Furthermore, the first three-way valve is provided with two inlets and one outlet, the first inlet is connected with the outlet of the fuel filter, the second inlet is connected with the outlet of the second three-way valve, and the outlet is connected with the inlet of the constant-pressure oil pump.
Furthermore, the three-way valve II is provided with two inlets and an outlet, the inlet I is connected with an oil return port of the oil injector, the inlet II is connected with a pressure relief port of the high-pressure oil rail through a one-way electromagnetic pressure limiting valve, and the outlet is connected with the inlet II of the three-way valve I.
Furthermore, the high-pressure oil rail is provided with an oil inlet, an oil outlet and an oil drainage port, the oil inlet is connected with the oil outlet of the high-pressure oil pump, the oil outlet is connected with the inlet of the oil sprayer, and the oil drainage port is connected with the second inlet of the three-way valve through the one-way electromagnetic pressure limiting valve.
Furthermore, the one-way electromagnetic pressure reducing valve I, the one-way electromagnetic pressure reducing valve II, the one-way electromagnetic valve and the one-way electromagnetic pressure limiting valve are kept in a normally closed state and are opened only when receiving signals of the electronic control unit.
The control method of the premixed fuel preparation supply system with high concentration and high stability comprises the following steps:
the method comprises the following steps: the electronic control unit initializes after receiving the power supply signal;
step two: the liquid level sensor detects the liquid level in the tank; if the liquid level is lower than the lower limit value, the constant pressure oil pump receives a signal and starts working, and the one-way electromagnetic pressure reducing valve receives a signal and starts; if the liquid level is higher than the upper limit value, the one-way electromagnetic pressure reducing valve I and the constant pressure boosting oil pump are kept closed;
step three: the pressure sensor detects the pressure in the tank; if the pressure is lower than the lower limit value, the one-way electromagnetic pressure reducing valve receives a signal and is opened;
step four: the liquid level sensor detects the liquid level in the tank; if the liquid level is lower than the lower limit value, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals to be opened; if the liquid level is higher than the upper limit value, the second one-way electromagnetic pressure reducing valve and the one-way electromagnetic valve receive signals and are closed;
step five: the pressure sensor detects the pressure in the tank; if the pressure is higher than the upper limit value, the one-way electromagnetic pressure reducing valve I, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals and are closed, and the pressurization air pump receives signals and starts to work;
step six: the method comprises the steps that an oil rail pressure sensor judges the pressure of micro-nano scale bubble-like flow premixed fuel in a high-pressure oil rail, and if the current oil rail pressure is smaller than a preset value oil rail pressure, the opening degree of a high-pressure oil rail inlet valve is increased; if the current oil rail pressure is greater than the preset oil rail pressure, the oil drainage port of the high-pressure oil rail is opened, and the fuel flows into a second three-way valve through a one-way electromagnetic pressure limiting valve;
step seven: the high-pressure oil rail supplies oil to the oil injector;
step eight: the fuel is sprayed into a combustion chamber of the engine through a fuel injector, and the un-sprayed fuel flows into a second three-way valve through an oil return port of the fuel injector;
step nine: repeating the second step to the eighth step;
step ten: and when receiving a stop signal of the electronic control unit, stopping the operation of the high-concentration high-stability premixed fuel preparation and supply system.
Compared with the prior art, the invention has the beneficial effects that:
the high-concentration high-stability premixed fuel preparation and supply system and the control method comprise the steps of firstly introducing pressurized fuel into a Venturi type micro-nano bubble generator to suck gas in a high-pressure environment to prepare bubble flow premixed fuel, secondly sending the premixed fuel into a high-pressure environment porous membrane tube type micro-nano bubble generator preparation tank to carry out secondary preparation, and preparing bulk micro-nano scale bubble flow premixed fuel based on two micro-nano bubble generation units in the high-pressure environment, wherein the micro-nano scale bubbles are more concentrated in particle size, the stability is greatly improved, and the premixing of the fuel and the air is realized, and the concentration and the stability of the micro-nano bubbles are effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a logic diagram of the method of the present invention.
Fig. 3 is a schematic structural diagram of a high-pressure environment venturi-type bulk micro-nano scale bubble-like flow premixing fuel preparation tank in the invention.
FIG. 4 is a schematic structural diagram of a high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixing fuel preparation tank.
Fig. 5 is a schematic structural diagram of the venturi-type micro-nano bubble generator of the present invention.
In the figure: the system comprises an oil tank 1, a fuel filter 2, a three-way valve I3, a gas filter 4, a high-pressure gas source 5, a constant booster oil pump 6, a high-pressure environment Venturi type phase micro-nano scale bubble flow premix fuel preparation tank 7, a high-pressure environment porous membrane tube type phase micro-nano scale bubble flow premix fuel preparation tank 8, a high-pressure oil pump 9, a booster air pump 10, an engine combustion chamber 11, an oil rail pressure sensor 12, a high-pressure oil rail 13, an oil injector 14, an electronic control unit 15, a three-way valve II 16, a fixing bolt I301, an air inlet pipe I302, an oil inlet I303, a Venturi type micro-nano bubble generator 304, a pressure sensor I305, a liquid level sensor I306, an air inlet I307, an air inlet II 308, an oil outlet I309, a fixing bolt II 401, a gas selecting pipe II 402, an air inlet pressure gauge 403, a micro-nano scale porous membrane tube 404, a filter membrane 405, an oil inlet II 406, a pressure sensor II 407, a liquid level height sensor II 408, an air leakage 409, an oil outlet 410, an oil inlet III, an oil outlet 502 and an oil outlet III 503.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1 to 5, a high-concentration high-stability premixed fuel preparation supply system provided for one embodiment of the present invention includes:
the system comprises an oil tank 1, a fuel filter 2, a three-way valve I3, a gas filter 4, a high-pressure gas source 5, a constant booster oil pump 6, a high-pressure environment Venturi type bulk micro-nano scale bubbly flow premixed fuel preparation tank 7, a high-pressure environment porous membrane tube type bulk micro-nano scale bubbly flow premixed fuel preparation tank 8, a high-pressure oil pump 9, a booster air pump 10, an engine combustion chamber 11, an oil rail pressure sensor 12, a high-pressure oil rail 13, an oil injector 14, an electronic control unit 15, a three-way valve II 16, a one-way electromagnetic pressure reducing valve I, a one-way electromagnetic pressure reducing valve II and a one-way electromagnetic valve, wherein firstly, gas is filtered and decompressed and then sent into the high-pressure environment Venturi type bulk micro-nano scale bubbly flow premixed fuel preparation tank 7 to prepare bubbly flow fuel, then sent into the high-pressure environment porous membrane tube type bulk micro-nano scale bubbly flow premixed fuel preparation tank 8 to be prepared again, so that the micro-nano bubble gas phase density is improved, the premixed fuel is sent to the high-nano bubble gas-phase gas pump 9 to the high-pressure oil rail 13, and finally the oil injector 14 sprays the fuel into the engine combustion chamber to be mixed with air to be combusted according to signals of the electronic control unit 15.
In the embodiment of the present invention, it is preferable that the rail pressure control of the oil supply system, the change over time, the switching of the gas phase density and the bubble concentration are performed by controlling the actuator by the electronic control unit 15. The invention is divided into two parts, the first part is a bulk micro-nano scale bubble flow premixing fuel preparation system, and a two-stage mixed fuel preparation method is used to ensure that the fuel supplied to an engine to participate in combustion has enough micro-nano bubble gas-phase density; the second part is a supply system provided for a two-stage premixed fuel preparation system, so that the preparation system can meet the high-pressure, safe and stable environment and quickly supply premixed fuel to the inside of a combustion chamber to participate in combustion. The fuel tank 1 uses flammable hydrocarbon fuels such as gasoline, diesel oil, biodiesel and coal oil as liquid phase carriers to prepare bulk micro-nano scale bubble flow premixed fuel. The high-pressure gas source 5 uses compressed storage gas such as oxygen and hydrogen except air to prepare the bulk-phase micro-nano scale bubble-shaped flow premixed fuel.
As shown in fig. 1 and fig. 3, as a preferred embodiment of the present invention, the high-pressure environment venturi-type bulk micro-nano scale bubble flow premix fuel preparation tank 7 includes a first fixing bolt 301, a first air inlet pipe 302, a first oil inlet 303, a venturi-type micro-nano bubble generator 304, a first pressure sensor 305, a first liquid level sensor 306, a first air inlet 307, a second air inlet 308, and a first oil outlet 309; the first oil inlet 303 is connected with an oil outlet of the constant pressure oil pump 6; the first air inlet 307 is connected with the outlet of the air filter 4; the second air inlet 308 is connected with the outlet of the booster air pump 10.
In the embodiment of the present invention, preferably, the venturi-type micro-nano bubble generator 304 includes an oil inlet three 501, an air inlet three 502, and an oil outlet three 503. The first pressure sensor 305 measures the pressure in the storage tank and transmits the pressure to the electronic control unit 15 for processing and ensuring the pressure in the storage tank, so that micro-nano bubbles in the premixed fuel are prevented from being separated out due to pressure change; the first liquid level sensor 306 transmits a liquid level height signal to the electronic control unit for processing by measuring the liquid level height so as to ensure the supply of bulk micro-nano scale bubble flow fuel in the running process of the engine.
As shown in fig. 1 and 4, as a preferred embodiment of the invention, the high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premix fuel preparation tank 8 comprises a second fixing bolt 401, a second air inlet pipe 402, a second air inlet pressure gauge 403, a micro-nano scale porous membrane tube 404, a filter membrane 405, a second oil inlet 406, a second pressure sensor 407, a second liquid level sensor 408, a second air vent 409 and a second oil outlet 410; the second air inlet pipe 402 is connected with an air outlet of the air filter 4; the oil inlet II 406 is connected with the oil outlet I309; the air leakage opening 409 is connected with an inlet of the booster air pump 10; the second oil outlet 410 is connected with an inlet of the high-pressure oil pump 9.
In the embodiment of the invention, preferably, the second pressure sensor 407 measures the pressure in the storage tank and transmits the pressure to the electronic control unit 15 for processing, so that the pressure in the storage tank is ensured, and micro-nano bubbles in the premixed fuel are prevented from being separated out due to pressure change; the second liquid level sensor 408 transmits the liquid level height signal to the electronic control unit 15 for processing by measuring the liquid level height so as to ensure the supply of bulk micro-nano scale bubble flow fuel in the running process of the engine. The micron-scale filter membrane 405 is used for removing micron-size bubbles to prevent mixed fuel from being supplied to an engine to participate in combustion.
As shown in fig. 1 to 4, as a preferred embodiment of the present invention:
in terms of oil path connection, the outlet of the oil tank 1 is connected with the inlet of the fuel filter 2; the outlet of the fuel filter 2 is connected with the inlet of a first three-way valve 3; the outlet of the first three-way valve 3 is connected with the inlet of the constant booster oil pump 6; an outlet of the constant booster oil pump 6 is connected with the first oil inlet 303; the first oil outlet 309 is connected with the second oil inlet 406; the second oil outlet 410 is connected with an inlet of the high-pressure oil pump 9; the outlet of the high-pressure oil pump 9 is connected with the inlet valve of the high-pressure oil rail 13; the outlet of the high-pressure oil rail 13 is connected with the inlet of an oil injector 14, and the oil drainage port of the high-pressure oil rail 13 is connected with the inlet of a second three-way valve 16 through a one-way electromagnetic pressure limiting valve; an oil return port of the oil injector 14 is connected with an inlet of a second three-way valve 16; the outlet of the second three-way valve 16 is connected with the inlet of the first three-way valve 3; the fuel injector 14 is connected with the engine combustion chamber 11;
in the aspect of gas path connection, the outlet of the high-pressure gas source 5 is connected with the inlet of the gas filter 4; an outlet of the gas filter 4 is connected with a first gas inlet 307 through a first one-way electromagnetic pressure reducing valve, and an outlet of the gas filter 4 is connected with a second gas inlet pipe 402 of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixed fuel preparation tank 8 through a second one-way electromagnetic pressure reducing valve; an air outlet of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-like flow premixed fuel preparation tank 8 is connected with an air inlet of a booster air pump 10; the air outlet of the booster air pump 10 is connected with the second air inlet 308;
in terms of signal connection, the input end of the electronic control unit 15 is respectively connected with the first pressure sensor 305, the first liquid level sensor 306, the second pressure sensor 407 and the second liquid level sensor 408, and the output end of the electronic control unit 15 is respectively connected with the air compressor 4, the constant pressure oil pump 6, the high pressure oil pump 13, the oil injector 14, the one-way electromagnetic pressure limiting valve, the one-way electromagnetic pressure reducing valve I, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve.
In the embodiment of the present invention, it is preferable that the injector 14 injects fuel into the engine combustion chamber 11 to participate in combustion. The outlet of the oil tank 1 is connected with the inlet of the fuel filter 2, so that the supply of fuel and the filtration of fuel impurities are realized, and the blockage of an oil supply system is prevented. 5 exports of high pressurized air source and 4 access connections of gas cleaner realize gaseous impurity and filter, prevent that gas supply system from thoughtlessly having debris. The outlet of the gas filter 4 is connected with the first air inlet 307 through a first one-way electromagnetic pressure reducing valve, so that the constant pressure in the tank and the preparation of the premixed fuel are ensured. The air outlet of the pressurization air pump 10 is connected with the air inlet II 308, so that when the pressure in the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-shaped flow premixing fuel preparation tank 8 exceeds a preset value, the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-shaped flow premixing fuel is pressurized and sent into the high-pressure environment Venturi type bulk micro-nano scale bubble-shaped flow premixing fuel preparation tank 7. An outlet of the gas filter 4 is connected with a second air inlet pipe 402 of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixed fuel preparation tank 8 through a second one-way electromagnetic pressure reducing valve to supply the premixed fuel for preparation. An air outlet of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-shaped flow premixed fuel preparation tank 8 is connected with an air inlet of the pressurization air pump 10, so that when the pressure in the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-shaped flow premixed fuel preparation tank 8 exceeds a preset value, atomized oil gas is timely sent into the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-shaped flow premixed fuel preparation tank 7. The electronic control unit 15 gives a signal to the high-pressure oil rail 13 to control the pressure, and meanwhile, the oil rail pressure sensor 12 sends a signal to the electronic control unit 15 and the electronic control unit 15 gives a signal to the one-way electromagnetic pressure limiting valve, so that the pressure of the high-pressure oil rail is ensured.
As shown in fig. 1, as a preferred embodiment of the present invention, the first three-way valve 3 has two inlets and one outlet, the first inlet is connected to the outlet of the fuel filter 2, the second inlet is connected to the outlet of the second three-way valve 16, and the outlet is connected to the inlet of the constant-pressure oil pump 6.
As shown in FIG. 1, as a preferred embodiment of the present invention, the second three-way valve 16 has two inlets and one outlet, the first inlet is connected with the oil return port of the fuel injector 14, the second inlet is connected with the pressure relief port of the high-pressure fuel rail 13 through a one-way electromagnetic pressure limiting valve, and the outlet is connected with the second inlet of the first three-way valve 3.
As shown in fig. 1, as a preferred embodiment of the present invention, the high-pressure oil rail 13 has an oil inlet, an oil outlet and an oil drain, the oil inlet is connected to the oil outlet of the high-pressure oil pump 9, the oil outlet is connected to the inlet of the oil injector 14, and the oil drain is connected to the second inlet of the three-way valve 16 through the one-way electromagnetic pressure limiting valve.
As shown in fig. 1, as a preferred embodiment of the present invention, the first one-way electromagnetic pressure reducing valve, the second one-way electromagnetic pressure reducing valve, the one-way electromagnetic valve and the one-way electromagnetic pressure limiting valve are kept in a normally closed state and are opened only when receiving the electronic control unit signal 15.
As shown in fig. 2, a control method of a high-concentration high-stability premixed fuel preparation supply system according to an embodiment of the present invention includes the steps of:
the method comprises the following steps: the electronic control unit 15 initializes after receiving the power supply signal;
step two: the first liquid level sensor 306 detects the liquid level in the tank; if the liquid level is lower than the lower limit value, the constant pressure oil pump 6 receives a signal and starts working, and the one-way electromagnetic pressure reducing valve receives a signal and is opened; if the liquid level is higher than the upper limit value, keeping the first one-way electromagnetic pressure reducing valve and the constant booster oil pump 6 closed;
step three: the first pressure sensor 305 detects the pressure in the tank; if the pressure is lower than the lower limit value, the one-way electromagnetic pressure reducing valve receives a signal and is opened;
step four: a second liquid level sensor 408 detects the liquid level in the tank; if the liquid level is lower than the lower limit value, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals to be opened; if the liquid level is higher than the upper limit value, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals and are closed;
step five: a second pressure sensor 407 detects the pressure in the tank; if the pressure is higher than the upper limit value, the one-way electromagnetic pressure reducing valve I, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals and are closed, and the supercharging air pump 10 receives signals and starts to work;
step six: the oil rail pressure sensor 12 judges the pressure of micro-nano scale bubble flow premixed fuel in the high-pressure oil rail 13, and if the current oil rail pressure is smaller than the preset oil rail pressure, the opening degree of an inlet valve of the high-pressure oil rail 13 is increased; if the current oil rail pressure is greater than the preset oil rail pressure, an oil drainage port of the high-pressure oil rail 13 is opened, and the fuel flows into a second three-way valve 16 through a one-way electromagnetic pressure limiting valve;
step seven: the high-pressure oil rail 13 supplies oil to the oil injector 14;
step eight: fuel is sprayed into the engine combustion chamber 11 through the fuel injector 14, and un-sprayed fuel flows into the second three-way valve 16 through the oil return port of the fuel injector 14;
step nine: repeating the second step to the eighth step;
step ten: upon receiving the stop signal from the electronic control unit 15, the operation of the high-concentration high-stability premixed fuel preparation supply system is stopped.
The working principle of the invention is as follows:
when the engine is started, the electronic control unit 15 gives an opening signal to the constant pressurizing oil pump 6, fuel in the oil tank 1 is filtered by the fuel filter 2 and pumped by the three-way valve I3 to reach an oil inlet of the high-pressure environment Venturi type phase micro-nano scale bubble-shaped flow premixing fuel preparation tank 7, and meanwhile, gas in the high-pressure gas source 5 is filtered by the gas filter 4, decompressed by the single-phase electromagnetic valve I and then is sent into the high-pressure environment Venturi type phase micro-nano scale bubble-shaped flow premixing fuel preparation tank 7; the preliminarily prepared premixed fuel is conveyed to a high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixed fuel preparation tank 8 through a one-way electromagnetic valve, meanwhile, gas in a high-pressure gas source 5 is filtered through a gas filter 4, is subjected to pressure reduction through a single-way electromagnetic valve II and then is conveyed to a gas inlet pipe II 402, and secondary preparation is carried out in the preparation tank to improve the gas phase density of micro-nano bubbles. And (3) starting oil supply, sending bulk micro-nano scale bubble flow fuel into a high-pressure oil rail 13 through a high-pressure oil pump 9 to establish rail pressure, sending an oil injection signal, injecting the fuel into an engine combustion chamber 11 through an oil injector 14 to be mixed with air to participate in combustion, and enabling the un-injected fuel to flow back to a second controllable three-way valve 16 through an oil return port.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (9)
1. A premixed fuel preparation feed system with high concentration and high stability, characterized by comprising:
the system comprises an oil tank, a fuel filter, a three-way valve I, a gas filter, a high-pressure gas source, a constant booster oil pump, a high-pressure environment Venturi type bulk micro-nano scale bubble-shaped flow premixed fuel preparation tank, a high-pressure environment porous membrane tube type bulk micro-nano scale bubble-shaped flow premixed fuel preparation tank, a high-pressure oil pump, a booster air pump, an engine combustion chamber, an oil rail pressure sensor, a high-pressure oil rail, an oil injector, an electronic control unit, a three-way valve II, a one-way electromagnetic pressure reducing valve I, a one-way electromagnetic pressure reducing valve II and a one-way electromagnetic valve.
2. The system for preparing and supplying the high-concentration high-stability premixed fuel according to claim 1, wherein the high-pressure environment Venturi type bulk micro-nano scale bubble flow premixed fuel preparation tank comprises a first fixing bolt, a first air inlet pipe, a first oil inlet, a Venturi type micro-nano bubble generator, a first pressure sensor, a first liquid level sensor, a first air inlet, a second air inlet and a first oil outlet; the first oil inlet is connected with an oil outlet of the constant pressure oil pump; the first air inlet is connected with an outlet of the air filter; and the second air inlet is connected with the outlet of the booster air pump.
3. The system for preparing and supplying the high-concentration high-stability premixed fuel according to claim 2, wherein the high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixed fuel preparation tank comprises a fixing bolt II, a gas inlet pipe II, a gas inlet pressure gauge, a micro-nano scale porous membrane tube, a filtering membrane, a oil inlet II, a pressure sensor II, a liquid level sensor II, a gas leakage port and an oil outlet II; the second air inlet pipe is connected with an air outlet of the air filter; the oil inlet II is connected with the oil outlet I; the air leakage port is connected with an inlet of the pressurization air pump; and the second oil outlet is connected with an inlet of the high-pressure oil pump.
4. The high-concentration high-stability premixed fuel preparation supply system according to claim 3, characterized in that:
in terms of oil path connection, the oil tank outlet is connected with the fuel filter inlet; the outlet of the fuel filter is connected with an inlet of a three-way valve; an outlet of the three-way valve is connected with an inlet of the constant pressure oil pump; the outlet of the constant pressure oil pump is connected with the first oil inlet; the first oil outlet is connected with the second oil inlet; the second oil outlet is connected with an inlet of the high-pressure oil pump; the outlet of the high-pressure oil pump is connected with the inlet valve of the high-pressure oil rail; the outlet of the high-pressure oil rail is connected with the inlet of the oil injector, and the oil drainage port of the high-pressure oil rail is connected with the inlet of the second three-way valve through a one-way electromagnetic pressure limiting valve; the oil return port of the oil injector is connected with the inlet of the second three-way valve; the outlet of the second three-way valve is connected with the inlet of the first three-way valve; the fuel injector is connected with a combustion chamber of the engine;
in the aspect of gas path connection, the high-pressure gas source outlet is connected with the inlet of the gas filter; the outlet of the gas filter is connected with a first gas inlet through a one-way electromagnetic pressure reducing valve, and is connected with a second gas inlet pipe of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble flow premixed fuel preparation tank through a one-way electromagnetic pressure reducing valve; the air outlet of the high-pressure environment porous membrane tube type bulk micro-nano scale bubble-like flow premixed fuel preparation tank is connected with the air inlet of the booster pump; the air outlet of the booster air pump is connected with the air inlet II;
in the aspect of signal connection, the input end of the electronic control unit is respectively connected with the first pressure sensor, the first liquid level sensor, the second pressure sensor and the second liquid level sensor, and the output end of the electronic control unit is respectively connected with the air compressor, the constant pressure boosting oil pump, the high-pressure oil pump, the oil injector, the one-way electromagnetic pressure limiting valve, the one-way electromagnetic pressure reducing valve I, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve.
5. The system according to claim 4, wherein the first three-way valve has two inlets, one outlet, the first inlet is connected to the outlet of the fuel filter, the second inlet is connected to the outlet of the second three-way valve, and the outlet is connected to the inlet of the constant pressure fuel pump.
6. The system according to claim 5, wherein the second three-way valve has two inlets, one outlet, the first inlet is connected to the return port of the injector, the second inlet is connected to the pressure relief port of the high pressure rail through a one-way electromagnetic pressure limiting valve, and the outlet is connected to the second inlet of the first three-way valve.
7. The system for preparing and supplying the high-concentration and high-stability premixed fuel according to claim 6, wherein the high-pressure oil rail is provided with an oil inlet, an oil outlet and an oil drainage port, the oil inlet is connected with the oil outlet of the high-pressure oil pump, the oil outlet is connected with an inlet of the oil injector, and the oil drainage port is connected with a second inlet of the three-way valve through a one-way electromagnetic pressure limiting valve.
8. The system of claim 1, wherein the first one-way solenoid pressure reducing valve, the second one-way solenoid pressure reducing valve, the one-way solenoid valve and the one-way solenoid pressure limiting valve are kept normally closed and are opened only when receiving signals from the electronic control unit.
9. The control method of a high-concentration high-stability premixed fuel preparation supply system according to any one of claims 1 to 8, characterized by comprising the steps of:
the method comprises the following steps: the electronic control unit initializes after receiving the power supply signal;
step two: the liquid level sensor detects the liquid level in the tank; if the liquid level is lower than the lower limit value, the constant pressure oil pump receives a signal and starts working, and the one-way electromagnetic pressure reducing valve receives a signal and is opened; if the liquid level is higher than the upper limit value, the one-way electromagnetic pressure reducing valve I and the constant pressure boosting oil pump are kept closed;
step three: the pressure sensor detects the pressure in the tank; if the pressure is lower than the lower limit value, the one-way electromagnetic pressure reducing valve receives a signal and is opened;
step four: the liquid level sensor detects the liquid level in the tank; if the liquid level is lower than the lower limit value, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals to be opened; if the liquid level is higher than the upper limit value, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals and are closed;
step five: the pressure sensor detects the pressure in the tank; if the pressure is higher than the upper limit value, the one-way electromagnetic pressure reducing valve I, the one-way electromagnetic pressure reducing valve II and the one-way electromagnetic valve receive signals and are closed, and the pressurization air pump receives signals and starts to work;
step six: the method comprises the steps that an oil rail pressure sensor judges the pressure of micro-nano scale bubble-like flow premixed fuel in a high-pressure oil rail, and if the current oil rail pressure is smaller than a preset value oil rail pressure, the opening degree of a high-pressure oil rail inlet valve is increased; if the current oil rail pressure is greater than the preset oil rail pressure, the oil drainage port of the high-pressure oil rail is opened, and the fuel flows into a second three-way valve through a one-way electromagnetic pressure limiting valve;
step seven: the high-pressure oil rail supplies oil to the oil injector;
step eight: the fuel is sprayed into a combustion chamber of the engine through a fuel injector, and the un-sprayed fuel flows into a second three-way valve through an oil return port of the fuel injector;
step nine: repeating the second step to the eighth step;
step ten: and when receiving a stop signal of the electronic control unit, stopping the operation of the high-concentration high-stability premixed fuel preparation and supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211742657.6A CN115962070A (en) | 2022-12-23 | 2022-12-23 | High-concentration high-stability premixed fuel preparation and supply system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211742657.6A CN115962070A (en) | 2022-12-23 | 2022-12-23 | High-concentration high-stability premixed fuel preparation and supply system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115962070A true CN115962070A (en) | 2023-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211742657.6A Pending CN115962070A (en) | 2022-12-23 | 2022-12-23 | High-concentration high-stability premixed fuel preparation and supply system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115962070A (en) |
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- 2022-12-23 CN CN202211742657.6A patent/CN115962070A/en active Pending
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