CN117386543A - One-way valve jet structure and equivalent ratio active jet system thereof - Google Patents
One-way valve jet structure and equivalent ratio active jet system thereof Download PDFInfo
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- CN117386543A CN117386543A CN202311538678.0A CN202311538678A CN117386543A CN 117386543 A CN117386543 A CN 117386543A CN 202311538678 A CN202311538678 A CN 202311538678A CN 117386543 A CN117386543 A CN 117386543A
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- precombustion
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 71
- 239000000446 fuel Substances 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims description 52
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 109
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 26
- 239000002737 fuel gas Substances 0.000 abstract description 17
- 239000003345 natural gas Substances 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 description 17
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/008—Arrangement of fuel passages inside of 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The application relates to a check valve jet structure and equivalence ratio initiative fluidic system thereof, the check valve jet structure includes: the precombustion jet unit comprises a jet chamber adapter, wherein one end of the jet chamber adapter is coaxially connected with a precombustion jet chamber, one end of the jet chamber adapter connected with the precombustion jet chamber is fixedly provided with a one-way valve, and a spark plug for igniting mixed gas in the precombustion jet chamber; the fuel supply unit comprises a fuel gas rail, a fuel gas nozzle is connected to the fuel gas rail, an adapter is connected to the output end of the fuel gas nozzle, and a jet flow supply pipeline extending into the flow chamber adapter and communicated with the one-way valve is connected to the adapter. According to the jet chamber adapter and the pre-combustion jet chamber, when the jet chamber adapter and the pre-combustion jet chamber are arranged in the cylinder head of the engine body, jet is actively performed on the main combustion chamber of the engine, so that ignition energy is improved, combustion of mixed gas in the main combustion chamber is accelerated, combustion efficiency is improved, emission of natural gas is reduced, and engine efficiency is improved.
Description
Technical Field
The application relates to the technical field of internal combustion engines, in particular to a one-way valve jet structure and an equivalent ratio active jet system thereof.
Background
Natural gas, hydrogen, ammonia and other low-carbon/zero-carbon fuels can provide power for ships, trucks and engineering vehicles, and have great potential in the aspect of converting fossil fuels into zero-carbon fuels. Based on the characteristics of low-carbon/zero-carbon gas fuel, the jet ignition scheme can improve ignition energy, reduce fuel-air ratio, improve engine economy and reduce harmful emissions of the engine.
In the related art, chinese patent CN115822773a discloses a gas supply system for promoting in-cylinder combustion based on jet chamber injection swirl flame. After the high-concentration mixed gas in the jet flow chamber is ignited by the spark plug, a swirl flame rotating along the axis of the combustion chamber is formed under the action of the guide vane, the swirl flame ignites the lean mixed gas in the combustion chamber, the turbulent energy of the mixed gas in the combustion chamber is enhanced, the concentrated heat release of combustion in a cylinder is facilitated, the combustion duration is shortened, and the combustion stability of the natural gas engine in a lean combustion state is improved.
Chinese patent CN115931366a discloses a jet ignition combustion device of a high efficiency engine for a gantry. Comprises a spark plug, a jet chamber injector, a jet chamber suspension cabin and a jet chamber extension body; the upper portion of jet flow chamber suspension bin is equipped with spark plug mounting hole and jet flow chamber sprayer mounting hole, and the spark plug is established in the spark plug mounting hole, and jet flow chamber sprayer is established in jet flow chamber sprayer mounting hole, and the lower part of jet flow chamber suspension bin is equipped with jet flow chamber extension body mounting hole, and jet flow chamber extension body is established in jet flow chamber extension body mounting hole, is equipped with the interior cavity that supplies jet flow chamber combustion on the jet flow chamber extension body, and interior cavity bottom is equipped with the jet hole that is used for being linked together with engine main combustion chamber to be equipped with heat dissipation water jacket structure outside the jet flow chamber suspension bin.
However, in the related art, the active jet integrates the spark plug and the nozzle on the jet chamber, so that the jet chamber has huge volume and special structure, and the problems of complex manufacture, high manufacturing cost, difficult cooling and heat dissipation and the like exist. The large jet chamber volume makes the overall arrangement poorer, wherein the spark plug or nozzle tilting is only suitable for single overhead camshaft engines, but not for dual overhead camshaft engines. The larger jet flow chamber volume makes the cylinder cover punch bigger, influences cylinder cover internal structure intensity.
Disclosure of Invention
The embodiment of the application provides a check valve jet structure and an equivalent ratio active jet system thereof, which are used for solving the problems that in the related technology, the existing active jet integrates a spark plug and a nozzle on a jet chamber, so that the jet chamber is huge in volume and special in structure, and the problems of complex manufacturing and high manufacturing cost exist.
A first aspect of embodiments of the present application provides a check valve jet structure, including:
the pre-combustion jet unit comprises a jet chamber adapter, one end of the jet chamber adapter is coaxially connected with a pre-combustion jet chamber, one end of the jet chamber adapter connected with the pre-combustion jet chamber is fixedly provided with a one-way valve, and a spark plug for igniting mixed gas in the pre-combustion jet chamber;
the fuel supply unit comprises a fuel gas rail, a fuel gas nozzle is connected to the fuel gas rail, an adapter is connected to the output end of the fuel gas nozzle, and a jet flow supply pipeline extending into the jet flow chamber adapter and communicated with the one-way valve is connected to the adapter.
In some embodiments: the precombustion jet unit also comprises an ignition coil positioned at the other end of the jet chamber adapter, and an ignition coil spacer of the ignition coil stretches into the jet chamber adapter and is connected with the spark plug.
In some embodiments: the precombustion jet chamber is connected with the jet chamber adapter through pressing, and a polytetrafluoroethylene sealing ring is arranged at the joint between the precombustion jet chamber and the jet chamber adapter for sealing.
In some embodiments: the periphery of the precombustion jet chamber is provided with a first annular mounting groove, a first annular sealing ring is arranged in the first annular mounting groove, and the first annular sealing ring is used for sealing a gap between the precombustion jet chamber and the cylinder cover;
the periphery of the jet flow chamber adapter is provided with a second annular mounting groove, a second annular sealing ring is arranged in the second annular mounting groove, and the second annular sealing ring is used for sealing a gap between the jet flow chamber adapter and the cylinder cover.
In some embodiments: one end of the jet flow chamber adapter, which is close to the precombustion jet flow chamber, is provided with a check valve mounting hole for mounting the check valve and a spark plug threaded hole for mounting the spark plug, and one end of the jet flow supply pipeline extends into the check valve mounting hole and is in sealing connection with the check valve mounting hole through a third sealing ring.
In some embodiments: the one-way valve is provided with an outwards-expanded corrugated ring, the diameter of the corrugated ring is larger than the inner diameter of the one-way valve mounting hole, and the one-way valve is connected with the one-way valve mounting hole on the jet flow chamber adapter through interference fit of the corrugated ring.
In some embodiments: the gas rail is fixed on the cylinder cover, the gas rail and the gas rail support are connected through bolts, the adapter is fixed on the gas rail support, one end of the adapter is in sealing connection with the gas nozzle through a fourth sealing ring, and one end of the adapter is in sealing connection with the jet flow supply pipeline through a threaded clamping sleeve.
In some embodiments: the jet flow chamber adapter is provided with a sealing gasket which is used for pressing the jet flow chamber adapter in the cylinder cover and is fixedly connected with the cylinder cover, and the jet flow supply pipeline is provided with a jet flow supply pipeline clamp which is used for fixing the jet flow supply pipeline on the cylinder cover.
A second aspect of the embodiments provides an equivalence ratio active jet system comprising:
the engine body is connected with an air inlet pipeline and an exhaust pipeline, the exhaust pipeline is connected with a supercharger, the supercharger is coaxially connected with a compressor, and the compressor is connected with the air inlet pipeline;
the fuel gas supply unit comprises a fuel gas injection valve and a mixer, wherein the mixer mixes the compressed air output by the compressor and the fuel sprayed by the fuel gas injection valve and then inputs the mixed compressed air and the fuel sprayed by the fuel gas injection valve into the air inlet pipeline;
a precombustion injection unit comprising a gas booster pump connected to the mixer, the gas booster pump being connected with the one-way valve jet structure of any one of claims 1 to 8, the precombustion jet unit of the one-way valve jet structure extending into the engine body.
In some embodiments: and the exhaust pipe is connected with an EGR loop for supplying EGR exhaust gas to the mixer, and the EGR loop is provided with an EGR valve for controlling the flow of the EGR loop.
The beneficial effects that technical scheme that this application provided brought include:
the embodiment of the application provides a check valve jet structure and an equivalent ratio active jet system thereof, and the check valve jet structure is provided with a precombustion jet unit, the precombustion jet unit comprises a jet chamber adapter, one end of the jet chamber adapter is coaxially connected with a precombustion jet chamber, one end of the jet chamber adapter connected with the precombustion jet chamber is fixedly provided with a check valve, and a spark plug for igniting mixed gas in the precombustion jet chamber; the fuel supply unit comprises a fuel rail, a fuel nozzle is connected to the fuel rail, an adapter is connected to the output end of the fuel nozzle, and a jet flow supply pipeline extending into the flow chamber adapter and communicated with the check valve is connected to the adapter.
Therefore, the check valve jet structure of the application adopts the pre-burning jet unit and the fuel supply unit, wherein the pre-burning jet unit is provided with the jet chamber adapter and the pre-burning jet chamber which are coaxially connected, the check valve for unidirectional control of the jet mixture of the pre-burning jet chamber is arranged in the jet chamber adapter, the check valve prevents flame flashback in the pre-burning jet chamber, and the spark plug for igniting the mixture of the pre-burning jet chamber is arranged in the jet chamber adapter. When the jet flow chamber adapter and the precombustion jet flow chamber are arranged in the cylinder head of the engine body, active jet flow is performed on the main combustion chamber of the engine, so that ignition energy is improved, combustion of mixed gas in the main combustion chamber is accelerated, combustion efficiency is improved, emission of natural gas is reduced, and engine efficiency is improved.
The fuel supply unit is provided with a fuel gas rail, a fuel gas nozzle, an adapter and a jet supply pipeline which are used for supplying the mixed gas to the check valve in sequence. The gas rail is used for providing the mixed gas with stable pressure, the gas nozzle is used for injecting the mixed gas with set flow to the precombustion jet flow chamber, the adapter is used for excessively connecting the gas nozzle and the jet flow supply pipeline, and the jet flow supply pipeline is used for directly injecting the mixed gas to the precombustion jet flow chamber instead of the gas nozzle. The gas nozzle with larger volume and size is arranged outside the cylinder cover, so that the arrangement difficulty of the cylinder cover of the engine is reduced, the volume of the pre-combustion jet chamber is smaller, the arrangement and the installation are easy, the cylinder cover is changed less, and the processing difficulty is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a jet structure of a check valve according to an embodiment of the present application;
FIG. 2 is a schematic illustration of a check valve jet structure according to an embodiment of the present application mounted on a cylinder head;
FIG. 3 is an enlarged view of a portion of a connecting structure of a check valve jet structure and a cylinder head according to an embodiment of the present application;
FIG. 4 is an enlarged view of a portion of the connection of the jet chamber adapter to the pre-combustion jet chamber according to an embodiment of the present application;
fig. 5 is a schematic diagram of the structure of an equivalent ratio active jet system according to an embodiment of the present application.
Reference numerals:
1. an engine body; 2. an air intake line; 3. an exhaust line; 4. a supercharger; 5. a compressor; 6. a fuel tank; 7. a gas injection valve; 8. a mixer; 9. a booster pump; 10. an EGR valve; 11. an EGR circuit; 12. a cylinder head cover; 13. a cylinder head;
20. a precombustion jet unit; 21. a jet chamber adapter; 22. a pre-combustion jet chamber; 23. a one-way valve; 24. a spark plug; 25. an ignition coil; 26. an ignition coil spacer; 27. a first annular seal ring; 28. a second annular seal ring; 29. a polytetrafluoroethylene sealing ring;
30. a fuel supply unit; 31. a gas rail; 32. a gas nozzle; 33. an adapter; 34. a jet supply line; 35. jet supply line clamp; 36. an air rail bracket; 37. a sealing gasket; 38. and a third sealing ring.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The embodiment of the application provides a check valve jet structure and an equivalent ratio active jet system thereof, which can solve the problems of huge jet chamber volume, special structure, complex manufacture and high manufacturing cost caused by the fact that an existing active jet integrates a spark plug and a nozzle on a jet chamber in the related technology.
Referring to fig. 1 and 2, a first aspect of an embodiment of the present application provides a jet structure of a check valve, including:
prechamber jet unit 20. Prechamber jet unit 20 includes a jet chamber adapter 21. Prechamber jet chamber 22 is coaxially connected to one end of jet chamber adapter 21. A plurality of jet holes for injecting flame are provided at one end of prechamber jet chamber 22 remote from jet chamber adapter 21. A check valve 23 for injecting the mixture into the pre-combustion chamber 22 and a spark plug 24 for igniting the mixture in the pre-combustion chamber 22 are fixedly provided at one end of the jet chamber adapter 21 connected to the pre-combustion chamber 22. When the pre-combustion jet unit 20 is installed in the cylinder head 13 of the engine body 1, the one-way valve 23 controls the injection of the mixture into the pre-combustion jet chamber 22 in a one-way manner, the mixture in the pre-combustion jet chamber 22 generates flame under the ignition of the spark plug 24, and the flame is quickly ignited in the main combustion chamber after being diverged and ejected from the jet hole.
The fuel supply unit 30 includes a gas rail 31, the gas rail 31 is used for providing mixed gas with constant pressure, a gas nozzle 32 is connected to the gas rail 31, and the gas nozzle 32 is controlled by an on-vehicle ECU to provide mixed gas with set flow rate to the pre-combustion jet chamber 22 of the pre-combustion jet unit 20. An adapter 33 is connected to the output end of the gas nozzle 32, and a jet supply line 34 extending into the jet chamber adapter 21 and communicating with the check valve 23 is connected to the adapter 33. The adapter 33 is used for connecting the gas nozzle 32 and the jet supply pipeline 34 excessively, and the diameter of the gas nozzle 32 is larger, about 11.3mm, the diameter of the jet supply pipeline 34 is smaller, about 4mm, and the adapter 33 is used for switching due to the larger diameter difference.
The check valve jet structure of the embodiment of the application is composed of a precombustion jet unit 20 and a fuel supply unit 30, wherein the precombustion jet unit 20 is provided with a jet chamber adapter 21 and a precombustion jet chamber 22 which are coaxially connected, a check valve 23 for injecting mixed gas towards the precombustion jet chamber 22 in a unidirectional way is arranged in the jet chamber adapter 21, the check valve 23 is used for preventing flame flashback in the precombustion jet chamber 22, and a spark plug 24 for igniting the mixed gas in the precombustion jet chamber 22 is arranged in the jet chamber adapter 21. When the jet chamber adapter 21 and the precombustion jet chamber 22 are installed in the cylinder head 13 of the engine body 1, jet flow is actively performed for the main combustion chamber of the engine, so that ignition energy is improved, combustion of mixed gas in the main combustion chamber is accelerated, combustion efficiency is improved, emission of natural gas is reduced, and engine efficiency is improved.
The fuel supply unit 30 is provided with a gas rail 31, a gas nozzle 32, an adapter 33, and a jet supply line 34 that supply the mixture gas to the check valve 23 in this order. The gas rail 31 is used for providing a pressure-stable gas mixture, the gas nozzle 32 is used for injecting a set flow of the gas mixture into the pre-combustion jet chamber 22, and the adapter 33 is used for excessively connecting the gas nozzle 32 and the jet supply pipeline 34. The jet supply line 34 is used to inject the mixture directly into the pre-combustion jet chamber 22 instead of the gas nozzle 32. The gas nozzle 32 with larger volume and size is arranged outside the cylinder cover 13, so that the arrangement difficulty of the cylinder cover 13 is reduced, the volume of the precombustion jet chamber 22 is smaller, the arrangement and the installation are easy, the modification to the cylinder cover 13 is smaller, and the processing difficulty is reduced.
In some alternative embodiments: referring to fig. 1 and 2, the embodiment of the present application provides a check valve jet structure, in which the pre-combustion jet unit 20 further includes an ignition coil 25 at the other end of the jet chamber adapter 21, and an ignition coil spacer 26 of the ignition coil 25 extends into the jet chamber adapter 21 and is connected to the spark plug 24. The ignition coil 25 is controlled by the vehicle-mounted ECU, and when the vehicle-mounted ECU controls the ignition coil 25 to discharge to the ignition plug 24, the ignition plug 24 rapidly ignites the mixture in the pre-combustion jet chamber 22, the mixture in the pre-combustion jet chamber 22 is ignited to generate flame, and the flame is emitted from the jet hole and then rapidly ignites the mixture in the main combustion chamber.
In some alternative embodiments: referring to fig. 2 and 3, the embodiment of the application provides a jet structure of a one-way valve, in which a precombustion jet chamber 22 and a jet chamber adapter 21 of the jet structure of the one-way valve are connected through insertion and extraction or are connected through threads, the precombustion jet chamber 22 is sleeved outside the jet chamber adapter 21, and a polytetrafluoroethylene sealing ring 29 is arranged at the joint between the precombustion jet chamber 22 and the jet chamber adapter 21 for sealing.
The precombustion jet chamber 22 and the jet chamber adaptor 21 are sealed by polytetrafluoroethylene sealing rings 29 to seal the jet flame at the junction between the precombustion jet chamber 22 and the jet chamber adaptor 21. The polytetrafluoroethylene seal ring 29 has excellent chemical stability, corrosion resistance, sealing property, high lubrication non-tackiness, electrical insulation property, and good aging resistance. High temperature resistance, the working temperature reaches 250 ℃, and the sealing use requirement is met in a high temperature environment.
In some alternative embodiments: referring to fig. 2 and 3, the embodiment of the present application provides a check valve jet structure, in which a first annular mounting groove is provided at the outer periphery of a pre-combustion jet chamber 22 of the check valve jet structure, a first annular sealing ring 27 is provided in the first annular mounting groove, and the first annular sealing ring 27 is used for sealing a gap between the pre-combustion jet chamber 22 and a cylinder head 13 so as to prevent cooling water from entering a main combustion chamber.
A second annular mounting groove is provided on the outer periphery of the jet chamber adapter 21, and a second annular seal ring 28 is provided in the second annular mounting groove, the second annular seal ring 28 being for sealing a gap between the jet chamber adapter 21 and the cylinder head 13 to prevent engine oil from entering the main combustion chamber. The periphery of the jet chamber adapter 21 is also provided with an annular cooling water tank communicated with the cooling water hole of the cylinder cover 13, and a cooling flow channel is formed between the annular cooling water tank and the cylinder cover 13 together so as to cool down the jet chamber adapter 21 and the precombustion jet chamber 22, reduce the working temperatures of the first annular sealing ring 27, the second annular sealing ring 28 and the polytetrafluoroethylene sealing ring 29, and improve the sealing performance and the service life.
In some alternative embodiments: referring to fig. 3 and 4, the embodiment of the present application provides a check valve jet structure, in which a jet chamber adapter 21 of the check valve jet structure is provided with a check valve mounting hole for mounting a check valve 23 at one end near a pre-combustion jet chamber 22, and a spark plug threaded hole for mounting a spark plug 24. One end of the jet flow supply pipeline 34 extends into the check valve mounting hole and is in sealing connection with the check valve 23 mounting hole through the third sealing ring 38 so as to prevent leakage of the mixed gas. The check valve 23 is provided with an outwards-expanded corrugated ring, the diameter of the corrugated ring is slightly larger than the inner diameter of the check valve mounting hole, and the check valve 23 is connected with the check valve mounting hole on the jet chamber adapter 21 through interference fit of the corrugated ring, so that the check valve 23 and the check valve mounting hole are in a good sealing state.
In some alternative embodiments: referring to fig. 3 and 4, the embodiment of the application provides a jet structure of a check valve, which further includes a gas rail bracket 36 for fixing the gas rail 31 on the cylinder head 13, and the gas rail 31 is connected with the gas rail bracket 36 through bolts, so that the gas rail 31 is supported and positioned, the fixing manner can be used for a natural gas engine, a hydrogen engine and a hydrogen ammonia engine, and the hydrogen engine includes a main combustion chamber hydrogen rail and a jet chamber hydrogen rail, and the problem of difficult arrangement of double gas rails is solved by adopting the gas rail bracket 36.
The adapter 33 is also fixed on the gas rail bracket 36, and the bolts on the gas rail bracket 36 provide a pressing force to the gas rail 31, so that the gas nozzle 32 is pressed into the adapter 33, and the pressing force is provided between the gas nozzle 32 and the adapter 33. One end of the adapter 33 is in sealing connection with the gas nozzle 32 through a fourth sealing ring, a well-processed sealing state of the joint of the adapter 33 and the gas nozzle 32 is kept, and one end of the adapter 33 is in sealing connection with the jet flow supply pipeline 34 through a thread cutting sleeve.
In some alternative embodiments: referring to fig. 2, the embodiment of the present application provides a check valve jet structure, in which a sealing gasket 37 for pressing the jet chamber adapter 21 into the cylinder head 13 and fixedly connecting with the cylinder head cover 12 is provided at an end of the jet chamber adapter 21 away from the pre-combustion jet chamber 22, and a jet supply pipe clamp 35 for fixing the jet supply pipe 34 to the cylinder head cover 12 is provided on the jet supply pipe 34. The jet supply line clamp 35 can both fasten the jet supply line 34 to the cylinder head cover 12 and provide downward pressure to compress the jet supply line 34 against the third seal ring 38, keeping the third seal ring 38 working properly.
Referring to fig. 1-5, a second aspect of an embodiment of the present application provides an equivalence ratio active jet system comprising:
the engine body 1, be connected with air inlet line 2 and exhaust pipe 3 on this engine body 1, be connected with booster 4 on exhaust pipe 3, booster 4 coaxial coupling has compressor 5, and compressor 5 is connected with air inlet line 2. Exhaust gas discharged by the engine body 1 enters the supercharger 4 through the exhaust pipeline 3 so as to drive the supercharger 4 to rotate at a high speed, the supercharger 4 drives the gas compressor 5 to synchronously rotate so as to generate fresh compressed air, and the fresh compressed air enters the air inlet pipeline 2 and then participates in mixed combustion of natural gas, hydrogen or hydrogen and ammonia.
A fuel gas supply unit including a fuel gas injection valve 7 that pumps fuel in a fuel tank 6 into a single mixer 8, the fuel tank 6 is preferably, but not limited to, a natural gas tank, and the natural gas may be Liquefied Natural Gas (LNG) or Compressed Natural Gas (CNG). The mixer 8 mixes the compressed air output by the compressor 5 with the natural gas fuel sprayed by the gas injection valve 7 and then inputs the mixed gas into the air inlet pipeline 2, and the air inlet pipeline 2 conveys the mixed gas into the main combustion chamber to perform work in combination with combustion.
The precombustion injection unit, this precombustion injection unit includes the gas booster pump 9 that is connected with blender 8, and gas booster pump 9 is connected with the check valve jet structure of any one of the embodiment described above, and gas booster pump 9 is connected with the gas rail 31 of check valve jet structure, and gas booster pump 9 is used for providing the gas mixture to gas rail 31. The precombustion jet unit 20 of the one-way valve jet structure extends into the engine block 1.
According to the embodiment of the application, the precombustion injection unit and the gas supply unit both adopt natural gas single fuel, so that the complexity of the system is reduced, and the use of a user is facilitated. The pre-combustion injection unit is utilized to actively jet, so that the ignition energy is improved, the combustion of the mixed gas in the cylinder is accelerated, the combustion efficiency is improved, the emission of the gas is reduced, and the engine efficiency is improved. After the fuel gas supply unit is mixed with the equivalent ratio fuel, the mixed gas is sprayed into the pre-combustion jet chamber 22, so that the phenomenon that the residual waste gas cannot be discharged to cause circulation variation or fire is avoided.
In some alternative embodiments: referring to fig. 5, the embodiment of the application provides an equivalent ratio active jet system, an EGR loop 11 for supplying EGR exhaust gas to a mixer 8 is connected to an exhaust pipeline 3 of the equivalent ratio active jet system, an EGR valve 10 for controlling the flow rate of the EGR loop 11 is arranged on the EGR loop 11, the EGR valve 10 is controlled by an onboard ECU, and when the onboard ECU controls the opening of the EGR valve 10, the exhaust gas discharged by an engine body 1 is reused. Part of the exhaust gas discharged from the engine body 1 is returned to the mixer 8 and re-enters the cylinder together with the fresh mixture. Due to the high content of CO in the exhaust gas 2 Equimultiple atomic gasBody, and CO 2 The gas cannot burn but absorbs a large amount of heat due to the high specific heat capacity, so that the highest combustion temperature of the mixture in the cylinder is reduced, thereby reducing the generation amount of NOx.
Principle of operation
The embodiment of the application provides a check valve jet structure and an equivalent ratio active jet system thereof, because the check valve jet structure of the application is provided with a precombustion jet unit 20, the precombustion jet unit 20 comprises a jet chamber adapter 21, one end of the jet chamber adapter 21 is coaxially connected with a precombustion jet chamber 22, one end of the jet chamber adapter 21 is fixedly provided with a check valve 23 for injecting mixed gas into the precombustion jet chamber 22, and a spark plug 24 for igniting the mixed gas in the precombustion jet chamber 22; the fuel supply unit 30, the fuel supply unit 30 includes a gas rail 31, a gas nozzle 32 is connected to the gas rail 31, an adapter 33 is connected to an output end of the gas nozzle 32, and a jet supply pipe 34 extending into the jet chamber adapter 21 and communicating with the check valve 23 is connected to the adapter 33.
The check valve jet structure of the application adopts a precombustion jet unit 20 and a fuel supply unit 30 to form, wherein the precombustion jet unit 20 is provided with a jet chamber adapter 21 and a precombustion jet chamber 22 which are coaxially connected, a check valve 23 for injecting mixed gas towards the precombustion jet chamber 22 in a unidirectional way is arranged in the jet chamber adapter 21, flame flashback in the precombustion jet chamber 22 is prevented by the check valve 23, and a spark plug 24 for igniting the mixed gas in the precombustion jet chamber 22 is arranged in the jet chamber adapter 21. When the jet chamber adapter 21 and the precombustion jet chamber 22 are installed in the cylinder head 13 of the engine body 1, jet flow is actively performed for the main combustion chamber of the engine, so that ignition energy is improved, combustion of mixed gas in the main combustion chamber is accelerated, combustion efficiency is improved, emission of natural gas is reduced, and engine efficiency is improved.
The fuel supply unit 30 is provided with a gas rail 31, a gas nozzle 32, an adapter 33, and a jet supply line 34 that supply the mixture gas to the check valve 23 in this order. The gas rail 31 is used for providing the mixed gas with stable pressure, the gas nozzle 32 is used for injecting the mixed gas with set flow rate into the precombustion jet chamber 22, the adapter 33 is used for excessively connecting the gas nozzle 32 and the jet flow supply pipeline 34, and the jet flow supply pipeline 34 is used for directly injecting the mixed gas into the precombustion jet chamber 22 instead of the gas nozzle 32. The gas nozzle 32 with larger volume and size is arranged outside the cylinder cover 13, so that the arrangement difficulty of the cylinder cover 13 is reduced, the volume of the precombustion jet chamber 22 is smaller, the arrangement and the installation are easy, the modification to the cylinder cover 13 is smaller, and the processing difficulty is reduced.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A one-way valve jet structure, comprising:
the precombustion jet flow unit (20), the precombustion jet flow unit (20) comprises a jet flow chamber adapter (21), one end of the jet flow chamber adapter (21) is coaxially connected with a precombustion jet flow chamber (22), one end of the jet flow chamber adapter (21) connected with the precombustion jet flow chamber (22) is fixedly provided with a one-way valve (23), and a spark plug (24) for igniting mixed gas in the precombustion jet flow chamber (22);
the fuel supply unit (30), the fuel supply unit (30) includes gas rail (31), be connected with gas nozzle (32) on gas rail (31), the output of gas nozzle (32) is connected with adapter (33), adapter (33) are connected with and stretch into in jet-flow room adapter (21) and with jet-flow supply pipeline (34) of check valve (23) intercommunication.
2. A one-way valve fluidic structure as defined in claim 1, wherein:
the precombustion jet unit (20) further comprises an ignition coil (25) positioned at the other end of the jet chamber adapter (21), and an ignition coil spacer (26) of the ignition coil (25) stretches into the jet chamber adapter (21) and is connected with a spark plug (24).
3. A one-way valve fluidic structure as defined in claim 1, wherein:
the precombustion jet chamber (22) is connected with the jet chamber adapter (21) through plug connection or threaded connection, and a polytetrafluoroethylene sealing ring (29) is arranged at the joint between the precombustion jet chamber (22) and the jet chamber adapter (21) for sealing.
4. A one-way valve fluidic structure as claimed in claim 1 or 3, wherein:
the periphery of the pre-combustion jet chamber (22) is provided with a first annular mounting groove, a first annular sealing ring (27) is arranged in the first annular mounting groove, and the first annular sealing ring (27) is used for sealing a gap between the pre-combustion jet chamber (22) and the cylinder cover (13);
the periphery of the jet flow chamber adapter (21) is provided with a second annular mounting groove, a second annular sealing ring (28) is arranged in the second annular mounting groove, and the second annular sealing ring (28) is used for sealing a gap between the jet flow chamber adapter (21) and the cylinder cover (13).
5. A one-way valve fluidic structure as defined in claim 1, wherein:
one end of the jet flow chamber adapter (21) close to the precombustion jet flow chamber (22) is provided with a check valve mounting hole for mounting the check valve (23) and a spark plug threaded hole for mounting the spark plug (24), and one end of the jet flow supply pipeline (34) extends into the check valve mounting hole and is in sealing connection with the check valve mounting hole through a third sealing ring (38).
6. A one-way valve fluidic structure as defined in claim 5, wherein:
the one-way valve (23) is provided with an outwards-expanded corrugated ring, the diameter of the corrugated ring is larger than the inner diameter of the one-way valve mounting hole, and the one-way valve (23) is connected with the one-way valve mounting hole of the jet flow chamber adapter (21) through interference fit of the corrugated ring.
7. A one-way valve fluidic structure as defined in claim 1, wherein:
the gas cylinder is characterized by further comprising a gas rail support (36) for fixing the gas rail (31) on the cylinder cover (13), wherein the gas rail (31) and the gas rail support (36) are connected through bolts, an adapter (33) is fixed on the gas rail support (36), one end of the adapter (33) is in sealing connection with the gas nozzle (32) through a fourth sealing ring, and one end of the adapter (33) is in sealing connection with the jet supply pipeline (34) through a threaded cutting sleeve.
8. A one-way valve fluidic structure as defined in claim 1, wherein:
one end of the jet flow chamber adapter (21) far away from the precombustion jet flow chamber (22) is provided with a sealing gasket (37) which is used for tightly pressing the jet flow chamber adapter (21) in the cylinder head (13) and is fixedly connected with the cylinder head cover (12), and the jet flow supply pipeline (34) is provided with a jet flow supply pipeline clamp (35) which is used for fixing the jet flow supply pipeline (34) on the cylinder head cover (12).
9. An equivalence ratio active jet system, comprising:
the engine comprises an engine body (1), wherein an air inlet pipeline (2) and an exhaust pipeline (3) are connected to the engine body (1), a supercharger (4) is connected to the exhaust pipeline (3), the supercharger (4) is coaxially connected with a compressor (5), and the compressor (5) is connected with the air inlet pipeline (2);
the gas supply unit comprises a gas injection valve (7) and a mixer (8), wherein the mixer (8) mixes compressed air output by the compressor (5) with fuel sprayed by the gas injection valve (7) and then inputs the mixed air into the gas inlet pipeline (2);
a pre-combustion injection unit comprising a gas booster pump (9) connected with the mixer (8), the gas booster pump (9) being connected with the one-way valve jet structure of any one of claims 1 to 8, the pre-combustion jet unit (20) of the one-way valve jet structure extending into the engine block (1).
10. An equivalent ratio active jet system as set forth in claim 9, wherein:
an EGR circuit (11) for supplying EGR exhaust gas to the mixer (8) is connected to the exhaust pipeline (3), and an EGR valve (10) for controlling the flow of the EGR circuit (11) is arranged on the EGR circuit (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311538678.0A CN117386543A (en) | 2023-11-15 | 2023-11-15 | One-way valve jet structure and equivalent ratio active jet system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311538678.0A CN117386543A (en) | 2023-11-15 | 2023-11-15 | One-way valve jet structure and equivalent ratio active jet system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117889010A (en) * | 2024-03-14 | 2024-04-16 | 潍柴动力股份有限公司 | Cylinder and engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117889010A (en) * | 2024-03-14 | 2024-04-16 | 潍柴动力股份有限公司 | Cylinder and engine |
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