CN115306598A - Device for uniformly feeding air to gas engine - Google Patents
Device for uniformly feeding air to gas engine Download PDFInfo
- Publication number
- CN115306598A CN115306598A CN202210975198.XA CN202210975198A CN115306598A CN 115306598 A CN115306598 A CN 115306598A CN 202210975198 A CN202210975198 A CN 202210975198A CN 115306598 A CN115306598 A CN 115306598A
- Authority
- CN
- China
- Prior art keywords
- air
- gas
- pressure
- pipeline
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 claims abstract description 94
- 239000007924 injection Substances 0.000 claims abstract description 94
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims description 191
- 238000004891 communication Methods 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000000567 combustion gas Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 239000002737 fuel gas Substances 0.000 description 10
- 239000000446 fuel Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating or supervising devices
- F02B77/085—Safety, indicating or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
- F02B77/086—Sensor arrangements in the exhaust, e.g. for temperature, misfire, air/fuel ratio, oxygen sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10111—Substantially V-, C- or U-shaped ducts in direction of the flow path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention provides a device for uniform air inlet of a gas engine, which relates to the technical field of internal combustion engines and comprises an electromagnetic pressure regulating valve, a pressure difference balance valve, a U-shaped air communicating pipeline, an annular pipeline, a gas injection valve, a nozzle and a central control device, wherein the gas injection valve is arranged on the annular pipeline, the nozzle penetrates through the air communicating pipeline to be communicated with an air cylinder, the air communicating pipeline is provided with the air cylinder, the annular pipeline is provided with a second air inlet, the front end of the second air inlet is provided with the electromagnetic pressure regulating valve and the pressure difference balance valve, the position of the first air inlet of the air communicating pipeline is provided with a first pressure and temperature sensor, the annular pipeline is internally provided with a second pressure and temperature sensor, the central control device is in controllable connection with the first pressure and temperature sensors, and further enables the central control device to control the opening size of the electromagnetic pressure valve, and the air communicating pipeline and the annular pipeline provide air and gas pressure with stable pressure.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a device for uniformly feeding air to a gas engine.
Background
The ideal gas injection pressure should be dynamic and stable, but generally, the pressure regulating valve is manually regulated, cannot be automatically regulated, and has large pressure fluctuation, so that the requirements on the dynamic and stable gas injection pressure cannot be met. In actual work of the engine, along with changes of external conditions (such as changes of ship running conditions and channel conditions), the working conditions of the engine are continuously changed, and the gas injection pressure can be continuously adjusted along with the change of the external conditions and kept stable so as to meet working requirements.
In the prior art, the problem of consistency of gas supply is solved by correcting the gas injection amount through a gas injection valve, the design of a pressure stabilizing structure and a pressure stabilizing method of a gas supply structure gas supply device is lacked, the problem of gas pressure fluctuation cannot be solved by correcting the gas injection amount, and the problem of inconsistent work of each cylinder cannot be solved fundamentally.
Lack to adjust the stable control of gas injection pressure, gas injection pressure needs manual regulation, and can't guarantee pressure stability before adjusting, and the injection valve during operation easily produces pressure shock fluctuation, only can realize the steady pressure supply under single operating mode, can't satisfy the marine host computer use of water condition complicacy, especially the marine engine is gas pressure undulant big under the condition of suddenly loading and unloading operating mode and low-speed operating mode, and the row warm difference is big, causes the waste of fuel and produces the carbon deposit and influences engine life.
The technical research for improving the consistency of two rows of work of the engine by the V-shaped fuel gas is lacked, and the problem of poor consistency of work of each cylinder cannot be effectively solved.
The fuel gas injection control logic is achieved by controlling the fuel gas injection valves, the problem of control accuracy is solved by arranging a plurality of small-flow injection valves, the fuel gas injection valves are high in use requirement, cost and installation difficulty are increased, and most injection valves cannot meet the use requirement.
Therefore, the technical problems of dependence on control and adjustment of the gas injection valve, large gas injection pressure fluctuation and working inconsistency of each cylinder of the V-shaped gas engine in the prior art are solved, and the problems are mainly solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a device for uniform air intake of a gas engine, which aims to solve the technical problems of dependence on control and adjustment of a gas injection valve, large gas injection pressure fluctuation and inconsistent work of each cylinder of a V-shaped gas engine in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a device for uniformly feeding air to a gas engine, which comprises:
the air inlet structure comprises a U-shaped air communicating pipeline, wherein two ends of the air communicating pipeline are used for being connected with air, a plurality of first outlets are arranged on the air communicating pipeline along the extending direction of the air communicating pipeline, the first outlets are connected with an air cylinder, and two ends of the air communicating pipeline are provided with first air inlets for air to enter;
the annular pipeline is used for gas circulation and arranged above the air communicating pipeline, a plurality of second outlets are arranged on the annular pipeline, a gas injection valve is arranged at the position of each second outlet, the first outlet corresponds to the second outlet in position, a second gas inlet is arranged on the annular pipeline, and an electromagnetic pressure regulating valve and a differential pressure balance valve are arranged at the front end of each second gas inlet to provide gas with stable pressure;
a first pressure and temperature sensor is arranged at the position of the first air inlet, and a second pressure and temperature sensor is arranged in the annular pipeline;
the air cylinders are provided with third air outlets which are used for connecting exhaust pipes, and the third air outlet of each air cylinder is provided with a heat exhaust sensor;
a nozzle of the gas injection valve penetrates through the air communicating pipeline and penetrates through the first outlet to be communicated with the cylinder;
and the central control device is in controllable connection with the first pressure and temperature sensor, the second pressure and temperature sensor and the exhaust temperature sensor, so that the central control device controls the opening size of the electromagnetic pressure valve.
Preferably, the annular pipeline includes first layer pipeline, sets up in the first layer pipeline outside with the second floor pipeline of first layer pipeline parcel, first layer pipeline with be provided with the clearance between the second floor pipeline, wherein, first layer pipeline supplies the gas to pass through, the clearance that forms between first layer pipeline with the second floor pipeline supplies the inert gas circulation.
Preferably, the nozzle is in a horn shape, the end of the nozzle with a smaller cross-sectional area is a spraying end, and a plurality of spraying holes are formed in the side wall of the nozzle.
Preferably, the included angle formed between the side wall of the nozzle and the axis of the nozzle is 10-30 degrees.
Preferably, a top dead center sensor is arranged at a damping end of the engine, a rotating speed sensor for detecting a flywheel end is arranged at the flywheel end of the engine, and the rotating speed sensor and the top dead center sensor are communicated with a central control device, so that the central control device controls the opening time and duration of the gas injection valve.
Preferably, an oxygen sensor for detecting exhaust gas is arranged on an exhaust pipe of the engine, and the oxygen sensor is communicated with the central control device, so that the central control device controls the opening size of the electromagnetic pressure regulating valve.
Preferably, a protective cover is arranged on the injection valve.
The technical scheme provided by the application document comprises the following beneficial effects:
the invention provides a device for uniformly feeding air to a gas engine, which comprises: electromagnetic pressure regulating valve, pressure difference balance valve, air communicating pipe, ring conduit, gas injection valve, nozzle, central control unit, wherein:
the air communicating pipeline is set to be U-shaped, so that the air communicating pipeline with double rows communicated is formed, two ends of the air communicating pipeline are used for being connected with air, wherein a plurality of first outlets are arranged on the air communicating pipeline along the extending direction of the air communicating pipeline and connected with the air cylinders, air is conveyed for the air cylinders, first air inlets for air to enter are formed in two ends of the air communicating pipeline, the air enters from two air inlets of the U-shaped air communicating pipeline simultaneously, the pressure in the U-shaped air communicating pipeline can be guaranteed to be stable, and then stable-pressure air is provided for the air cylinders, pressure fluctuation in cavities caused when the air inlet valves of the air cylinders are opened during working can be remarkably reduced, the consistency of air-fuel ratios of the air cylinders is guaranteed, and the working consistency of the air cylinders is improved.
The ring pipeline is used for supplying gas to flow, and the ring pipeline sets up the top at air intercommunication pipeline, and space is saved, be provided with a plurality of second exports on the ring pipeline, wherein, the position of second export is provided with the gas injection valve, the position of first export and second export is corresponding, the quantity of cylinder is the same with the quantity of gas injection valve, be provided with the second air inlet on the ring pipeline, the front end of second air inlet is provided with electromagnetic pressure regulating valve and pressure differential balance valve, electromagnetic pressure regulating valve adjusts the gas pressure in the ring pipeline, in order to satisfy the pressure demand under the different operating modes of gas engine, the stable gas under the pressure of 3-10barg is provided to the ring pipeline reliably. The pressure difference balance valve can be automatically adjusted by relying on gas pressure change without depending on energy, flow deviation generated by residual pressure fluctuation of a pipeline is automatically eliminated, pressure difference of an inlet and an outlet is constant, and stable high-pressure gas is guaranteed to be provided for the annular pipeline. The gas flow rate is linearly related to the gas pressure in the annular pipeline, the higher the pressure is, the higher the flow rate of the gas flow is, the more accurate control of the gas injection amount can be realized by controlling the stable supply of the gas pressure, and the method has important significance for the marine engine in a complex water condition, namely a stop-and-go state.
Wherein, directly arrange the gas injection valve on the ring conduit, avoid prior art to set up the pressure fluctuation that causes on the branch pipeline with the gas injection valve. The annular pipeline can ensure that the gas injection valves at all positions of the gas pipeline can have enough pressure supply, and further reduce the pressure fluctuation in the annular pipeline when the engine works.
Wherein, for the convenience, the pressure value of the air that enters into in the air intercommunication pipeline and the gas in the ring channel is known, the position of first air inlet is provided with first pressure temperature sensor, because air intercommunication pipeline is linked together with the air all the time, first pressure temperature sensor set up the position at first air inlet can, make things convenient for people to install simultaneously, second pressure temperature sensor need detect the pressure of the gas in the ring channel, because balanced valve is torn open to import position installing port electromagnetic control valve and pressure in the ring channel, the pressure value with external gas is inequality in the ring channel, second pressure temperature sensor sets up in the ring channel promptly, the change of temperature and pressure in the ring channel of can real-time measurement.
The cylinder is provided with a third air outlet for being connected with an exhaust pipe, the third air outlet of each cylinder is provided with a heat exhaust sensor for detecting the temperature of gas generated by combustion of two gases in the cylinder, if the temperature of the gas exhausted by the cylinder is higher, the proportion of the gas to the air in the cylinder is higher, people are required to adjust the electromagnetic pressure regulating valve, and the size of an opening of the electromagnetic pressure regulating valve is reduced.
In order to realize automatic control, the central control device is connected with the first pressure temperature sensor, the second pressure temperature sensor and the exhaust temperature sensor in a controllable manner, the numerical value detected by the first pressure temperature sensor and the numerical value detected by the second pressure temperature sensor are transmitted to the central control device in real time, the central control device analyzes and judges whether each cylinder uniformly admits air or not according to the exhaust temperature condition, the gas injection quantity of each cylinder is adjusted by correcting the gas injection duration of the cylinder with larger temperature difference, the work of each cylinder is balanced, and the uniform air admission and the work consistency of each cylinder are improved. The gas injection duration is corrected by PID (proportional integral derivative integral) adjustment based on the rotating speed, and when the rotating speed exceeds the limit, the PID adjustment amount is increased in a step mode, so that the increase or decrease of the gas injection amount is rapidly realized, and the opening size of the electromagnetic pressure valve is controlled.
The nozzle of the gas injection valve penetrates through the air communicating pipeline and penetrates through the first outlet to be communicated with the cylinder, gas enters the air inlet channel of the cylinder after being sprayed out through the nozzle, and the position of the first outlet of the gas nozzle is changed into the air inlet channel of the cylinder, so that the gas injection process is not influenced by air flow, the escape of gas of each cylinder is obviously reduced, the performance of an engine is improved, and pollution emission is reduced to provide gas for the cylinder.
So set up, through adding electromagnetic pressure regulating valve and pressure difference balance valve, guarantee the uniformity of the gas pressure in the ring conduit, still avoided the fluctuation of gas simultaneously, because two first air inlets of the air intercommunication pipeline of U type are linked together, admit air simultaneously and provide stable air pressure, and then provide stable air-fuel ratio for each cylinder.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a control flow diagram illustrating an apparatus for uniform air intake for a gas engine according to an exemplary embodiment;
FIG. 2 is a structural diagram illustrating the location of the air communication conduit, the annular conduit, the gas injection valve, and the cylinder, according to an exemplary embodiment;
FIG. 3 is a cross-sectional structural schematic diagram illustrating an air communication duct in accordance with an exemplary embodiment;
FIG. 4 is a cross-sectional structural view illustrating an annular duct in accordance with an exemplary embodiment;
FIG. 5 is a schematic diagram illustrating a cutaway configuration of a gas injection valve mounted on an annular duct according to an exemplary embodiment.
In the figure: 100. an air communicating pipe; 101. a protection valve; 102. a gas injection valve; 103. an annular duct; 105. a nozzle; 107. a cylinder; 201. a first outlet; 202. a first layer of pipes; 203. a second layer of conduits; 204. a first air inlet; 205. a second air inlet; 400. a central control device; 401 top dead center sensor; 402. a first pressure temperature sensor; 403. a second pressure temperature sensor; 405. a rotational speed sensor; 406. a temperature exhaust sensor; 407. a differential pressure balancing valve; 408. an electromagnetic pressure regulating valve; 409. an oxygen sensor; 410. and (4) exhausting the gas.
Wherein, the dotted line in fig. 1 is a control line; the three points are drawn as waste gas pipelines; the double-dot chain line is a ventilation pipeline; the solid line is the natural gas line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The specific embodiment provides a device for uniform air intake of a gas engine, and solves the technical problems that the control and adjustment of a gas injection valve are depended, the pressure fluctuation of gas injection is large, and the working of each cylinder of a V-shaped gas engine is inconsistent in the prior art.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1 to 5, the present invention provides an apparatus for uniform intake of a gas engine, comprising: electromagnetic pressure regulating valve 408, differential pressure balancing valve 407, air communication conduit 100, annular conduit 103, gas injection valve 102, nozzle 105, central control unit 400, wherein:
the air communicating pipe 100 is U-shaped, so that a double-row communicated air communicating pipe 100 is formed, two ends of the air communicating pipe 100 are used for being connected with air, wherein a plurality of first outlets 201 are arranged on the air communicating pipe 100 along the extending direction of the air communicating pipe 100, the first outlets 201 are connected with the air cylinders 107 and used for conveying air for the air cylinders 107, two ends of the air communicating pipe 100 are respectively provided with a first air inlet 204 for air to enter, and air enters from the two first air inlets 204 of the U-shaped air communicating pipe 100 simultaneously, so that the stability of the pressure in the U-shaped air communicating pipe 100 can be ensured, and further air with stable pressure is provided for the air cylinders 107, the pressure fluctuation in cavities caused by opening of the air cylinders 107 during working can be obviously reduced, the consistency of the air-fuel ratio of the air cylinders 107 is ensured, and the working consistency of the air cylinders 107 is improved.
The annular pipeline 103 is used for supplying gas to flow, the annular pipeline 103 is arranged above the air communication pipeline 100, space is saved, a plurality of second outlets are arranged on the annular pipeline 103, gas injection valves 102 are arranged at the positions of the second outlets, the positions of the first outlets 201 correspond to the positions of the second outlets, the number of the cylinders 107 is the same as that of the gas injection valves 102, second air inlets 205 are arranged on the annular pipeline 103, an electromagnetic pressure regulating valve 408 and a pressure difference balancing valve 407 are arranged at the front ends of the second air inlets 205, the gas pressure in the annular pipeline 103 is regulated by the electromagnetic pressure regulating valve 408 to meet the pressure requirements of the gas engine under different working conditions, and gas under the pressure of 3-10barg is stably and reliably supplied to the annular pipeline 103. The pressure difference balance valve 407 can be automatically adjusted by gas pressure change without depending on energy, automatically eliminates flow deviation generated by residual pressure fluctuation of the pipeline, keeps the pressure difference of an inlet and an outlet constant, and ensures that stable high-pressure gas is provided for the annular pipeline 103. The gas flow rate is linearly related to the gas pressure in the annular pipeline 103, the higher the pressure is, the higher the flow rate of the gas flow is, the more accurate control of the gas injection amount can be realized by controlling the stable supply of the gas pressure, and the method has important significance for the marine engine in a complex water condition, namely a stop-and-go state.
Wherein gas injection valve 102 is arranged directly on annular duct 103, avoiding pressure fluctuations caused by the prior art arrangement of gas injection valve 102 on the branch lines. The annular duct 103 can ensure that the gas injection valves 102 at various positions of the gas duct can be supplied with sufficient pressure, so as to further reduce the pressure fluctuation in the annular duct 103 during the operation of the engine.
Wherein, for the convenience of knowing the pressure value of the air entering the air communicating pipe 100 and the gas in the ring pipeline 103, the position of the first air inlet 204 is provided with the first pressure and temperature sensor 402, because the air communicating pipe 100 is always communicated with the air, the first pressure and temperature sensor 402 is arranged at the position of the first air inlet 204, meanwhile, the installation by people is facilitated, the second pressure and temperature sensor 403 needs to detect the pressure of the gas in the ring pipeline, because the balance valve is dismantled to the inlet position installing port electromagnetic regulating valve and the pressure in the ring pipeline 103, the pressure value of the gas in the ring pipeline 103 is different from the outside, namely, the second pressure and temperature sensor 403 is arranged in the ring pipeline 103, and the change of the temperature and the pressure in the ring pipeline 103 can be measured in real time.
In order to detect the temperature of the gas generated after combustion, the cylinder is provided with a third gas outlet, the third gas outlet is used for being connected with an exhaust pipe 410, the third gas outlet of each cylinder 107 is provided with a temperature exhaust sensor 406 for detecting the temperature of the gas generated by combustion of the two gases in the cylinder 107, if the temperature discharged from the cylinder 107 is detected to be higher, the ratio of the gas to the air in the cylinder 107 is higher, and people are required to adjust the electromagnetic pressure regulating valve 408, so that the size of the opening of the electromagnetic pressure regulating valve 408 is reduced, if the temperature discharged from the cylinder 107 is detected to be higher, the ratio of the gas to the air in the cylinder 107 is lower, and people are required to adjust the electromagnetic pressure regulating valve 408, so that the size of the opening of the electromagnetic pressure regulating valve 408 is increased.
In order to realize automatic control, the central control device 400 is in controllable connection with the first pressure and temperature sensor 402, the second pressure and temperature sensor 403 and the exhaust temperature sensor 406, the value detected by the first pressure and temperature sensor 402 and the value detected by the second pressure and temperature sensor 403 are transmitted to the central control device 400 in real time, the central control device 400 analyzes and judges whether each cylinder 107 is uniformly charged or not according to the exhaust temperature condition, the gas injection amount of each cylinder 107 is adjusted by correcting the gas injection duration of the cylinder 107 with large temperature difference, the work of each cylinder 107 is balanced, and the uniform charging and the working consistency of each cylinder 107 are improved. The gas injection duration is corrected by PID (proportional integral derivative integral) adjustment based on the rotating speed, and when the rotating speed exceeds the limit, the PID adjustment amount is increased in a step mode, so that the increase or decrease of the gas injection amount is rapidly realized, and the opening size of the electromagnetic pressure valve is controlled.
The nozzle 105 of the gas injection valve 102 penetrates through the air communicating pipeline 100 and penetrates through the first outlet 201 to be communicated with the cylinder 107, the gas is injected from the nozzle 105 and enters the air inlet channel of the cylinder 107, and the position of the first outlet 201 of the gas nozzle is changed into the air inlet channel of the cylinder 107, so that the gas injection process is not influenced by air flow any more, the escape of the gas in each cylinder is obviously reduced, the performance of the engine is improved, and pollution emission is reduced to provide the gas for the cylinder 107.
So set up, through adding electromagnetic pressure-regulating valve 408 and pressure difference balanced valve 407, guarantee the uniformity of the gas pressure in the ring pipeline 103, still avoided the fluctuation of gas simultaneously, because two first air inlets 204 of the air intercommunication pipeline 100 of U type are linked together, and it provides stable air pressure to admit air simultaneously, and then provides stable air-fuel ratio for each cylinder 107.
The specific control method is as follows:
the central control system judges the gas pressure requirements under different water condition basins and different working conditions, people provide a gas injection time control map, provide a target gas pressure value and a target air pressure value, the gas pressure is adjusted to the target gas injection pressure through the combined action of the electromagnetic pressure regulating valve 408 and the differential pressure balancing valve 407, when the engine is started, the central control device 400 calculates the gas injection quantity according to the calibrated starting air quantity and the set air-fuel ratio, and the injection duration and the injection pressure are determined according to the flow characteristic of the gas injection valve 102. The second temperature and pressure sensor detects the actual gas pressure value, and compares the actual gas pressure value with the target gas pressure value, when the actual gas pressure demand pressure is not consistent, the central control unit 400 sends a gas pressure correction signal to the electromagnetic pressure regulating valve 408, so as to ensure that the gas pressure supply meets the optimal injection performance of the gas injection valve 102. For example, when the gas pressure is high at a certain time of the required gas amount, the duration may be reduced, which may cause inaccurate metering by the gas injection valve 102 and inconsistent injection by each cylinder 107, which may affect uniformity of gas intake by each cylinder 107, and when the gas pressure is low, which may cause a small injection amount by each cylinder 107, which may cause misfiring of the cylinder 107, resulting in combustion deterioration. And the proper fuel gas injection duration is kept by adjusting the fuel gas pressure, and a nonlinear area of the flow characteristic of the injection valve or an opening control difference interval of the injection valve is avoided. Under normal operating conditions, the gas injection valve 102 completes gas timing and quantitative injection according to the global injection timing map and the single-valve injection timing correction map. The central control device adjusts the gas outlet pressure of the electromagnetic pressure regulating valve 408 according to the feedback of each cylinder exhaust temperature sensor 406, and determines that the injection duration meets the gas injection duration requirement by combining with the flow characteristic curve of the gas injection valve 102. When the load is suddenly added, the central control unit 400 adopts a gas compensation strategy on the basis of PID (proportional integral derivative integral control logic) speed regulation, improves the gas supply pressure through the electromagnetic pressure regulating valve 408, and releases the quick response of high-pressure gas to cooperate with the quick supply of the gas compensation.
In this embodiment, the annular duct 103 includes a first layer of duct 202 and a second layer of duct 203 disposed outside the first layer of duct 202 and wrapping the first layer of duct 202, and a gap is provided between the first layer of duct 202 and the second layer of duct 203, wherein the first layer of duct 202 is used for gas to pass through, the gap formed between the first layer of duct 202 and the second layer of duct 203 is used for inert gas to flow through, and the gap formed between the first layer of duct 202 and the second layer of duct 203 is always filled with a flowable gas, which can take away the leaked gas at any time, thereby protecting the gas; meanwhile, the annular pipeline 103 is of an integral welding structure, so that connecting units are reduced, and the air leakage risk is reduced.
In this embodiment, the nozzle 105 is in the shape of a horn, and the smaller end of the cross-sectional area of the nozzle 105 is an injection end, so that the gas has a larger impact force when being injected, meanwhile, the side wall of the nozzle 105 is provided with a plurality of injection holes, the number of the injection holes is not less than 30, the pressure in the conduit of the gas injection valve 102 is converted into power, sound velocity flow is realized, and then the gas is diffused and sprayed out through the injection holes, and high-quality mixing with air is realized in the air inlet channel of the cover of the cylinder 107, that is, the plurality of injection holes on the side wall of the nozzle 105 can enable the high-pressure injected gas to form airflow disturbance, so as to promote the mixing of the gas and the air, promote airflow turbulence and tumble effects of the combustion chamber, improve the mixing uniformity of the mixed gas, realize homogeneous combustion, and reduce CH 4 The exhaust temperature of each cylinder can be further reduced by fully combusting the mixed gas and the emission of pollutants such as HC, CO and the like, so that NO is greatly reduced x And finally, the reduction of fuel consumption and the reduction of pollution emission are realized.
In this embodiment, to better achieve gas mixing, the sidewall of the nozzle 105 forms an angle of 10-30 with the axis of the nozzle 105.
In this embodiment, in order to identify different operating mode powers, the fuel gas injection time, the duration and the ignition time are differentiated according to needs, a top dead center sensor 401 is arranged at a damping end of the engine, a rotation speed sensor 405 for detecting a flywheel end is arranged at a flywheel end of the engine, the rotation speed sensor 405 and the top dead center sensor 401 are communicated with the central control device 400, the top dead center sensor 401 is used for detecting the position of the damping end of the engine, so that the central control device 400 controls the opening time of the fuel gas injection valve 102, the speed sensor is used for detecting the rotation speed of the flywheel end of the engine, the numerical value of the rotation speed is further transmitted to the central control device 400, and the central control device 400 controls the fuel gas injection time length based on calculation and analysis of PID.
In this embodiment, an exhaust pipe 410 of the engine is provided with an oxygen sensor 409 for detecting exhaust gas, the oxygen sensor 409 is communicated with the central control device 400, the oxygen sensor 409 is used for detecting the concentration of oxygen in the exhaust gas and further transmitting the detected data to the central control device 400, and the central control device 400 obtains data of the realized air-fuel ratio according to the data detected by the oxygen sensor 409, further controls the opening size of the electromagnetic pressure regulating valve 408, and optimally adjusts the supply of fuel gas.
In this embodiment, the gas injection valve 102 is provided with a protective cover 101 to prevent leakage of gas.
The annular pipeline 103 pressure stabilizing structure, the U-shaped air communicating pipeline 100 and the nozzle 105 for gas injection can remarkably reduce gas pressure fluctuation and escape phenomena, improve the gas and air intake consistency of each cylinder 107, effectively solve the problem of different temperature differences of the cylinders 107 of the V-shaped gas engine, meet the use requirements of complex water conditions, and have the advantages of reducing gas consumption rate, pollution emission and high-efficiency operation of various working conditions. Meanwhile, the gas supply pressure is stable and adjustable, the gas injection pressure is stable and reliable, high-precision control can be realized without arranging a plurality of gas injection valves 102, the gas injection time and the gas injection duration are additionally adjusted, the problem of the air inlet difference of the V-shaped gas engine can be effectively solved, and the working consistency and the service life of the engine are improved.
It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like as used herein, are intended to indicate an orientation or positional relationship relative to that shown in the drawings, but are merely used to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description herein, it is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The multiple schemes provided by the application comprise basic schemes of the scheme, are independent from each other and are not restricted with each other, but can also be combined with each other under the condition of no conflict, so that multiple effects are achieved together.
While embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (7)
1. A device for uniformly feeding air to a gas engine is characterized by comprising
The air source device comprises a U-shaped air communication pipeline (100), wherein two ends of the air communication pipeline (100) are used for being connected with air, a plurality of first outlets (201) are arranged on the air communication pipeline (100) along the extending direction of the air communication pipeline (100), the first outlets (201) are connected with an air cylinder (107), and two ends of the air communication pipeline (100) are provided with first air inlets (204) for air to enter;
the annular pipeline (103) is used for gas circulation and arranged above the air communication pipeline (100), a plurality of second outlets are arranged on the annular pipeline (103), a gas injection valve (102) is arranged at the position of each second outlet, the first outlet (201) corresponds to the position of each second outlet, a second gas inlet (205) is arranged on the annular pipeline (103), and an electromagnetic pressure regulating valve (408) and a differential pressure balancing valve (407) are arranged at the front end of each second gas inlet (205) to provide gas with stable pressure;
a first pressure and temperature sensor (402) is arranged at the position of the first air inlet (204), and a second pressure and temperature sensor (403) is arranged in the annular pipeline (103);
the air cylinders (107) are provided with third air outlets which are used for being connected with an exhaust pipe (410), and the third air outlet of each air cylinder (107) is provided with a heat exhaust sensor (406);
a nozzle (105) of the gas injection valve (102) communicates with the cylinder (107) through the first outlet (201) through the air communication duct (100);
and the central control device (400) is in controllable connection with the first pressure and temperature sensor (402), the second pressure and temperature sensor (403) and the exhaust temperature sensor (406), so that the central control device (400) controls the opening size of the electromagnetic pressure valve.
2. The device for the uniform intake of gas engines according to claim 1, characterized in that the annular duct (103) comprises a first layer of ducts (202), a second layer of ducts (203) arranged outside the first layer of ducts (202) and enveloping the first layer of ducts (202), a gap being provided between the first layer of ducts (202) and the second layer of ducts (203), wherein the first layer of ducts (202) is provided for the passage of the combustion gases and the gap formed between the first layer of ducts (202) and the second layer of ducts (203) is provided for the passage of the inert gases.
3. The device for uniform intake of a gas engine according to claim 1, wherein the nozzle (105) has a trumpet shape, and the end of the nozzle (105) having a smaller cross-sectional area is a jet end, and a plurality of jet holes are provided on the side wall of the nozzle (105).
4. The device for the uniform intake of gas engines according to claim 1, characterized in that the angle formed between the side wall of the nozzle (105) and the axis of the nozzle (105) is 10 ° -30 °.
5. The device for the uniform air intake of the gas engine as recited in claim 1, characterized in that a top dead center sensor (401) is arranged at the damping end of the engine, a rotating speed sensor (405) for detecting the flywheel end is arranged at the flywheel end of the engine, and the rotating speed sensor (405) and the top dead center sensor (401) are communicated with a central control device (400) so that the central control device (400) controls the opening time and duration of the gas injection valve (102).
6. The device for the uniform air intake of the gas engine as recited in claim 1, wherein an oxygen sensor (409) for detecting exhaust gas is arranged on an exhaust pipe (410) of the engine, and the oxygen sensor (409) is communicated with the central control device (400) so that the central control device (400) controls the opening size of the electromagnetic pressure regulating valve (408).
7. Device for the homogeneous feeding of gas engines, according to claim 1, characterized in that the injection valve is provided with a protective cover (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210975198.XA CN115306598A (en) | 2022-08-12 | 2022-08-12 | Device for uniformly feeding air to gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210975198.XA CN115306598A (en) | 2022-08-12 | 2022-08-12 | Device for uniformly feeding air to gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115306598A true CN115306598A (en) | 2022-11-08 |
Family
ID=83862680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210975198.XA Pending CN115306598A (en) | 2022-08-12 | 2022-08-12 | Device for uniformly feeding air to gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115306598A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4829941A (en) * | 1986-10-30 | 1989-05-16 | Mazda Motor Corp. | Intake system for multiple-cylinder engine |
| US4846117A (en) * | 1987-04-21 | 1989-07-11 | Mazda Motor Corporation | Intake system for multiple-cylinder engine |
| US5309886A (en) * | 1991-09-26 | 1994-05-10 | Mazda Motor Corporation | Supercharged internal combustion engine |
| US20150129076A1 (en) * | 2015-01-23 | 2015-05-14 | Caterpillar Inc. | Fuel supply routing assembly for engine to detect fuel leakage |
| CN205908388U (en) * | 2016-06-13 | 2017-01-25 | 重庆潍柴发动机有限公司 | A double -deck common rail pipe for multi -point injection |
| CN107387238A (en) * | 2017-09-15 | 2017-11-24 | 河南柴油机重工有限责任公司 | A kind of diesel gas bifuel system and control method |
| CN108915903A (en) * | 2018-06-14 | 2018-11-30 | 河南柴油机重工有限责任公司 | A kind of gas engine gas supply system |
| CN109339996A (en) * | 2018-10-29 | 2019-02-15 | 潍柴动力股份有限公司 | Gas handling system, air intake control method and the control device of large-diameter gas machine |
| CN113217180A (en) * | 2021-05-10 | 2021-08-06 | 河南柴油机重工有限责任公司 | Low-emission high-speed high-power marine gas engine system and control method |
| CN113250863A (en) * | 2021-05-10 | 2021-08-13 | 河南柴油机重工有限责任公司 | High-pressure and pressure-stabilizing injection system of marine gas engine and control method |
-
2022
- 2022-08-12 CN CN202210975198.XA patent/CN115306598A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4829941A (en) * | 1986-10-30 | 1989-05-16 | Mazda Motor Corp. | Intake system for multiple-cylinder engine |
| US4846117A (en) * | 1987-04-21 | 1989-07-11 | Mazda Motor Corporation | Intake system for multiple-cylinder engine |
| US5309886A (en) * | 1991-09-26 | 1994-05-10 | Mazda Motor Corporation | Supercharged internal combustion engine |
| US20150129076A1 (en) * | 2015-01-23 | 2015-05-14 | Caterpillar Inc. | Fuel supply routing assembly for engine to detect fuel leakage |
| CN205908388U (en) * | 2016-06-13 | 2017-01-25 | 重庆潍柴发动机有限公司 | A double -deck common rail pipe for multi -point injection |
| CN107387238A (en) * | 2017-09-15 | 2017-11-24 | 河南柴油机重工有限责任公司 | A kind of diesel gas bifuel system and control method |
| CN108915903A (en) * | 2018-06-14 | 2018-11-30 | 河南柴油机重工有限责任公司 | A kind of gas engine gas supply system |
| CN109339996A (en) * | 2018-10-29 | 2019-02-15 | 潍柴动力股份有限公司 | Gas handling system, air intake control method and the control device of large-diameter gas machine |
| CN113217180A (en) * | 2021-05-10 | 2021-08-06 | 河南柴油机重工有限责任公司 | Low-emission high-speed high-power marine gas engine system and control method |
| CN113250863A (en) * | 2021-05-10 | 2021-08-13 | 河南柴油机重工有限责任公司 | High-pressure and pressure-stabilizing injection system of marine gas engine and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105298664B (en) | A kind of biogas internal combustion engine generator group auxiliary fuel supply-system and its control method | |
| EP2143930B1 (en) | Control method of gas engine system and that system | |
| CN101460727B (en) | Operation method of gas engine | |
| US20060032477A1 (en) | Fuel quantity modulation in pilot ignited engines | |
| JP2009057872A (en) | Gas engine integral control method and device | |
| US7177752B2 (en) | Method of regulating an internal combustion engine | |
| JP2009057870A (en) | Gas engine integration control method and its device | |
| CN104121115A (en) | System and method for controlling air-fuel ratio of electronic control servo pressure regulating type natural gas engine | |
| US8020539B2 (en) | Device for distributing incoming gases in an internal combustion air supply system | |
| CN205101127U (en) | Marsh gas internal combustion generating set air -fuel ratio control system | |
| KR20130136508A (en) | Method for operating an internal combustion engine having at least two cylinders | |
| CN110259586A (en) | A kind of diesel engine cylinder deactivation gas path control method | |
| US20040024518A1 (en) | Charge density control for an internal combustion engine | |
| US6662795B2 (en) | Method and apparatus configured to maintain a desired engine emissions level | |
| CN108691674A (en) | A kind of GDI engine natural gas-gasoline double-fuel electric-control system and control strategy | |
| CN113217180A (en) | Low-emission high-speed high-power marine gas engine system and control method | |
| US20050172942A1 (en) | Method of regulating an internal combustion engine | |
| CN109404120A (en) | The compression-ignited zero nitrogen discharged pure oxygen rotary engine of one kind and its control method | |
| KR20200134246A (en) | Ship propulsion system and ship propulsion system modification method | |
| CN115306598A (en) | Device for uniformly feeding air to gas engine | |
| JP2004124891A (en) | Fuel injection control device of bi-fuel internal combustion engine | |
| US20190390613A1 (en) | Precombustion chamber gas engine | |
| CN110905694A (en) | Fuel double-injection system for natural gas engine and injection control method thereof | |
| WO2011125601A1 (en) | Idle rotation speed control device for bifuel engine | |
| CN214741648U (en) | Micro-jet ignition gas engine combustion control system and micro-jet ignition gas engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |