A one-way valve jet structure and its equivalent ratio active jet system

Abstract

The present application relates to a one-way valve jet structure and its equivalence ratio active jet system. The one-way valve jet structure includes: a pre-combustion jet unit, which includes a jet chamber adapter, one end of the jet chamber adapter is coaxially connected to the pre-combustion jet chamber, a one-way valve is fixed to the end of the jet chamber adapter connected to the pre-combustion jet chamber, and a spark plug ignites the mixture in the pre-combustion jet chamber; a fuel supply unit, which includes a gas rail, a gas nozzle is connected to the gas rail, and the output end of the gas nozzle is connected to an adapter, and the adapter is connected to a jet supply pipeline extending into the jet chamber adapter and connected to the one-way valve. When the jet chamber adapter and the pre-combustion jet chamber are installed in the cylinder head of the engine body, the present application is an active jet for the main combustion chamber of the engine, which increases the ignition energy, accelerates the combustion of the mixture in the main combustion chamber, improves the combustion efficiency, reduces premature gas emissions, and improves the engine efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of internal combustion engines, and in particular to a one-way valve jet structure and an equivalence ratio active jet system thereof. Background Art

[0002] Low-carbon / zero-carbon fuels such as natural gas, hydrogen, and ammonia can power ships, trucks, and engineering vehicles, and have great potential in the transition from fossil fuels to zero-carbon fuels. Based on the characteristics of low-carbon / zero-carbon gas fuels, the use of jet ignition schemes can increase ignition energy, reduce fuel-air ratio, improve engine economy, and reduce engine harmful emissions.

[0003] In the related art, Chinese patent CN115822773A discloses an air supply system based on a jet chamber to spray swirl flames to promote combustion in the cylinder. After the high-concentration mixture in the jet chamber of the patent 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 mixture in the combustion chamber, enhancing the turbulent kinetic energy of the mixture in the combustion chamber, which helps to promote the concentrated heat release of combustion in the cylinder, shorten the combustion duration, and improve the combustion stability of the natural gas engine under the lean combustion state.

[0004] Chinese patent CN115931366A discloses a jet ignition combustion device for a high-efficiency engine for a test bench, which includes a spark plug, a jet chamber injector, a jet chamber suspension and a jet chamber extension; the upper part of the jet chamber suspension is provided with a spark plug mounting hole and a jet chamber injector mounting hole, the spark plug is arranged in the spark plug mounting hole, the jet chamber injector is arranged in the jet chamber injector mounting hole, the lower part of the jet chamber suspension is provided with a jet chamber extension mounting hole, the jet chamber extension is arranged in the jet chamber extension mounting hole, the jet chamber extension is provided with an inner cavity for jet chamber combustion, the bottom end of the inner cavity is provided with an injection hole for communicating with the main combustion chamber of the engine, and a heat dissipation water jacket structure is provided outside the jet chamber suspension.

[0005] However, in the related art, the active jet integrates the spark plug and the nozzle into the jet chamber, resulting in a large volume of the jet chamber, an irregular structure, and problems such as complex manufacturing, high manufacturing cost, and difficulty in cooling and heat dissipation. The larger volume of the jet chamber makes the overall layout poor, where the slanted spark plug or nozzle is only suitable for a single overhead camshaft engine, but cannot be arranged for a dual overhead camshaft engine. The larger volume of the jet chamber makes the cylinder head hole larger, affecting the internal structural strength of the cylinder head. Summary of the invention

[0006] The embodiment of the present application provides a one-way valve jet structure and an equivalent ratio active jet system thereof to solve the problem in the related art that the existing active jet integrates the spark plug and the nozzle into the jet chamber, resulting in a large volume of the jet chamber, an irregular structure, and complex manufacturing and high manufacturing cost.

[0007] A first aspect of an embodiment of the present application provides a one-way valve jet structure, comprising:

[0008] A pre-combustion jet unit, the pre-combustion jet unit comprising a jet chamber adapter, one end of the jet chamber adapter being coaxially connected to the pre-combustion jet chamber, a one-way valve being fixed to one end of the jet chamber adapter connected to the pre-combustion jet chamber, and a spark plug for igniting the mixture in the pre-combustion jet chamber;

[0009] A fuel supply unit, the fuel supply unit comprises a gas rail, a gas nozzle is connected to the gas rail, an output end of the gas nozzle is connected to a adapter, and the adapter is connected to a jet supply pipeline extending into the jet chamber adapter and connected to the one-way valve.

[0010] In some embodiments: the pre-combustion jet unit further comprises an ignition coil located at the other end of the jet chamber adapter, and an ignition coil spacer of the ignition coil extends into the jet chamber adapter and is connected to a spark plug.

[0011] In some embodiments: the pre-combustion jet chamber and the jet chamber adapter are connected by compression, and a polytetrafluoroethylene sealing ring is provided at the connection between the pre-combustion jet chamber and the jet chamber adapter for sealing.

[0012] In some embodiments: a first annular mounting groove is provided on the outer periphery of the pre-combustion jet chamber, a first annular sealing ring is provided in the first annular mounting groove, and the first annular sealing ring is used to seal the gap between the pre-combustion jet chamber and the cylinder head;

[0013] A second annular mounting groove is disposed on the outer periphery of the jet chamber adapter, a second annular sealing ring is disposed in the second annular mounting groove, and the second annular sealing ring is used to seal the gap between the jet chamber adapter and the cylinder head.

[0014] In some embodiments: the jet chamber adapter is provided with a one-way valve mounting hole for mounting the one-way valve and a spark plug threaded hole for mounting the spark plug at one end close to the pre-combustion jet chamber, and one end of the jet supply pipeline extends into the one-way valve mounting hole and is sealed and connected to the one-way valve mounting hole through a third sealing ring.

[0015] In some embodiments: the one-way valve is provided with an outwardly expanding bellows, the diameter of the bellows is larger than the inner diameter of the one-way valve mounting hole, and the one-way valve and the one-way valve mounting hole on the jet chamber adapter are connected by an interference fit of the bellows.

[0016] In some embodiments: it also includes a gas rail bracket that fixes the gas rail to the cylinder head, the gas rail and the gas rail bracket are connected by bolts, the adapter is fixed to the gas rail bracket, one end of the adapter is sealed to the gas nozzle through a fourth sealing ring, and one end of the adapter is sealed to the jet supply pipeline through a threaded ferrule.

[0017] In some embodiments: a sealing gasket is provided on the end of the jet chamber adapter away from the pre-combustion jet chamber to press the jet chamber adapter into the cylinder head and fixedly connected to the cylinder head cover, and a jet supply pipeline clamp is provided on the jet supply pipeline to fix the jet supply pipeline on the cylinder head cover.

[0018] A second aspect of the embodiment of the present application provides an equivalence ratio active jet system, comprising:

[0019] An engine body, the engine body is connected to an intake pipeline and an exhaust pipeline, the exhaust pipeline is connected to a supercharger, the supercharger is coaxially connected to a compressor, and the compressor is connected to the intake pipeline;

[0020] A gas supply unit, the gas supply unit comprising a gas injection valve and a mixer, the mixer mixes the compressed air output by the compressor and the fuel sprayed by the gas injection valve and then inputs the mixture into the air intake pipeline;

[0021] A pre-combustion injection unit, the pre-combustion injection unit comprising a gas booster pump connected to the mixer, the gas booster pump being connected to the one-way valve jet structure according to any one of claims 1 to 8, the pre-combustion jet unit of the one-way valve jet structure extending into the engine body.

[0022] In some embodiments: the exhaust pipeline is connected to an EGR loop for supplying EGR exhaust gas to the mixer, and the EGR loop is provided with an EGR valve for controlling the EGR loop flow.

[0023] The beneficial effects of the technical solution provided by this application include:

[0024] An embodiment of the present application provides a one-way valve jet structure and an equivalent ratio active jet system thereof. Since the one-way valve jet structure of the present application is provided with a pre-combustion jet unit, the pre-combustion jet unit includes a jet chamber adapter, one end of the jet chamber adapter is coaxially connected to the pre-combustion jet chamber, a one-way valve is fixed to the end of the jet chamber adapter connected to the pre-combustion jet chamber, and a spark plug for igniting the mixture in the pre-combustion jet chamber; a fuel supply unit, the fuel supply unit includes a gas rail, a gas nozzle is connected to the gas rail, the output end of the gas nozzle is connected to a adapter, and the adapter is connected to a jet supply pipeline extending into the jet chamber adapter and connected to the one-way valve.

[0025] Therefore, the one-way valve jet structure of the present application is composed of a pre-combustion jet unit and a fuel supply unit, wherein the pre-combustion jet unit is provided with a coaxially connected jet chamber adapter and a pre-combustion jet chamber, and a one-way valve for one-way control of the pre-combustion jet chamber spraying the mixed gas is provided in the jet chamber adapter, the one-way valve prevents the flame in the pre-combustion jet chamber from backfires, and a spark plug for igniting the mixed gas in the pre-combustion jet chamber is provided in the jet chamber adapter. When the jet chamber adapter and the pre-combustion jet chamber are installed in the cylinder head of the engine body, it is an active jet for the main combustion chamber of the engine, which increases the ignition energy, accelerates the combustion of the mixed gas in the main combustion chamber, improves the combustion efficiency, reduces premature gas emissions, and improves the engine efficiency.

[0026] The fuel supply unit is provided with a gas rail, a gas nozzle, an adapter and a jet supply pipeline for sequentially supplying the mixture to the one-way valve. The gas rail is used to provide a mixture with stable pressure, the gas nozzle is used to spray a mixture of a set flow rate into the pre-combustion jet chamber, the adapter is used to connect the gas nozzle and the jet supply pipeline, and the jet supply pipeline is used to replace the gas nozzle to directly spray the mixture into the pre-combustion jet chamber. In this way, the gas nozzle with a larger volume and size is arranged outside the cylinder head, which reduces the difficulty of arranging the engine cylinder head, makes the pre-combustion jet chamber smaller in volume, and is easy to arrange and install, with less modification to the cylinder head, reducing the difficulty of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic structural diagram of a one-way valve jet structure according to an embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the structure of the one-way valve jet structure of the embodiment of the present application installed on the cylinder head;

[0030] Figure 3 It is a partial enlarged view of the one-way valve jet structure and the cylinder head connection structure of the embodiment of the present application;

[0031] Figure 4 It is a partial enlarged view of the connection structure between the jet chamber adapter and the pre-combustion jet chamber of the embodiment of the present application;

[0032] Figure 5 This is a schematic diagram of the structure of the equivalence ratio active jet system of an embodiment of the present application.

[0033] Reference numerals:

[0034] 1. Engine body; 2. Intake pipe; 3. Exhaust pipe; 4. Supercharger; 5. Compressor; 6. Fuel tank; 7. Gas injection valve; 8. Mixer; 9. Booster pump; 10. EGR valve; 11. EGR circuit; 12. Cylinder head cover; 13. Cylinder head;

[0035] 20. pre-combustion jet unit; 21. jet chamber adapter; 22. pre-combustion jet chamber; 23. one-way valve; 24. spark plug; 25. ignition coil; 26. ignition coil spacer; 27. first annular sealing ring; 28. second annular sealing ring; 29. ​​polytetrafluoroethylene sealing ring;

[0036] 30. Fuel supply unit; 31. Gas rail; 32. Gas nozzle; 33. Adapter; 34. Jet supply pipeline; 35. Jet supply pipeline clamp; 36. Gas rail bracket; 37. Sealing gasket; 38. Third sealing ring. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] The embodiment of the present application provides a one-way valve jet structure and an equivalent ratio active jet system thereof, which can solve the problem in the related art that the existing active jet integrates the spark plug and the nozzle into the jet chamber, resulting in a large volume of the jet chamber, an irregular structure, and complex manufacturing and high manufacturing cost.

[0039] See also Figure 1 and Figure 2 As shown, the first aspect of the embodiment of the present application provides a one-way valve jet structure, including:

[0040] The pre-combustion jet unit 20 includes a jet chamber adapter 21, a pre-combustion jet chamber 22 is coaxially connected to one end of the jet chamber adapter 21, and a plurality of jet holes for jetting flames are provided at one end of the pre-combustion jet chamber 22 away from the jet chamber adapter 21. A one-way valve 23 for jetting mixed gas into the pre-combustion jet chamber 22 and a spark plug 24 for igniting the mixed gas in the pre-combustion jet chamber 22 are fixedly provided at one end of the jet chamber adapter 21 connected to the pre-combustion jet 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 one-way injection of mixed gas into the pre-combustion jet chamber 22, and the mixed gas in the pre-combustion jet chamber 22 generates flames under the ignition of the spark plug 24. The flames are ejected from the jet holes and quickly ignite the mixed gas in the main combustion chamber.

[0041] The fuel supply unit 30 includes a gas rail 31, which is used to provide a mixed gas with a constant pressure. A gas nozzle 32 is connected to the gas rail 31. The gas nozzle 32 is controlled by the on-board ECU to provide a mixed gas with a 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 the adapter 33 is connected to a jet supply pipeline 34 extending into the jet chamber adapter 21 and connected to the one-way valve 23. The adapter 33 is used to transition the gas nozzle 32 and the jet supply pipeline 34. Since the gas nozzle 32 has a relatively large diameter of about 11.3 mm, and the jet supply pipeline 34 has a relatively thin diameter of about 4 mm, due to the large diameter difference, the adapter 33 is required for transition.

[0042] The one-way valve jet structure of the embodiment of the present application is composed of a pre-combustion jet unit 20 and a fuel supply unit 30, wherein the pre-combustion jet unit 20 is provided with a coaxially connected jet chamber adapter 21 and a pre-combustion jet chamber 22, and a one-way valve 23 for one-way jetting of the mixture toward the pre-combustion jet chamber 22 is provided in the jet chamber adapter 21, the one-way valve 23 is used to prevent the flame in the pre-combustion jet chamber 22 from backfired, and a spark plug 24 for igniting the mixture in the pre-combustion jet chamber 22 is provided in the jet chamber adapter 21. When the jet chamber adapter 21 and the pre-combustion jet chamber 22 are installed in the cylinder head 13 of the engine body 1, it is an active jet for the main combustion chamber of the engine, which increases the ignition energy, accelerates the combustion of the mixture in the main combustion chamber, improves the combustion efficiency, reduces premature gas emissions, and improves the engine efficiency.

[0043] The fuel supply unit 30 is provided with a gas rail 31, a gas nozzle 32, an adapter 33 and a jet supply pipeline 34 for sequentially supplying a mixture to the one-way valve 23. The gas rail 31 is used to provide a mixture with stable pressure, the gas nozzle 32 is used to spray a set flow of the mixture into the pre-combustion jet chamber 22, and the adapter 33 is used to connect the gas nozzle 32 and the jet supply pipeline 34. The jet supply pipeline 34 is used to replace the gas nozzle 32 and directly spray the mixture into the pre-combustion jet chamber 22. In this way, the gas nozzle 32 with a larger volume and size is arranged outside the cylinder head 13, which reduces the difficulty of arranging the cylinder head 13, makes the volume of the pre-combustion jet chamber 22 smaller, and is easy to arrange and install. The cylinder head 13 is less modified, and the processing difficulty is reduced.

[0044] In some alternative embodiments: See Figure 1 and Figure 2 As shown, the embodiment of the present application provides a one-way valve jet structure, wherein the pre-combustion jet unit 20 of the one-way valve jet structure further includes an ignition coil 25 located 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 on-board ECU. When the on-board ECU controls the ignition coil 25 to discharge to the spark plug 24, the spark plug 24 quickly ignites the mixed gas in the pre-combustion jet chamber 22, and the mixed gas in the pre-combustion jet chamber 22 is ignited to generate a flame, which is then ejected from the jet hole and quickly ignites the mixed gas in the main combustion chamber.

[0045] In some alternative embodiments: See Figure 2 and Figure 3 As shown, an embodiment of the present application provides a one-way valve jet structure, in which the pre-combustion jet chamber 22 is connected to the jet chamber adapter 21 by plug-in connection or threaded connection, the pre-combustion jet chamber 22 is sleeved on the outside of the jet chamber adapter 21, and a polytetrafluoroethylene sealing ring 29 is provided at the connection between the pre-combustion jet chamber 22 and the jet chamber adapter 21 for sealing.

[0046] The pre-combustion jet chamber 22 and the jet chamber adapter 21 are sealed by a polytetrafluoroethylene sealing ring 29 to seal the jet flame at the connection between the pre-combustion jet chamber 22 and the jet chamber adapter 21. The polytetrafluoroethylene sealing ring 29 has excellent chemical stability, corrosion resistance, sealing, high lubricity and non-stickiness, electrical insulation and good anti-aging resistance. It is resistant to high temperatures and can be used at a working temperature of 250°C, meeting the sealing requirements in high temperature environments.

[0047] In some alternative embodiments: See Figure 2 and Figure 3As shown, an embodiment of the present application provides a one-way valve jet structure, in which a first annular mounting groove is provided on the outer periphery of a pre-combustion jet chamber 22 of the one-way valve jet structure, and a first annular sealing ring 27 is provided in the first annular mounting groove. The first annular sealing ring 27 is used to seal the gap between the pre-combustion jet chamber 22 and the cylinder head 13 to prevent cooling water from entering the main combustion chamber.

[0048] A second annular mounting groove is provided on the outer periphery of the jet chamber adapter 21, and a second annular sealing ring 28 is provided in the second annular mounting groove. The second annular sealing ring 28 is used to seal the gap between the jet chamber adapter 21 and the cylinder head 13 to prevent the engine oil from entering the main combustion chamber. An annular cooling water groove connected to the cooling water hole of the cylinder head 13 is also provided on the outer periphery of the jet chamber adapter 21. A cooling flow channel is formed between the annular cooling water groove and the cylinder head 13 to cool the jet chamber adapter 21 and the pre-combustion jet chamber 22, and reduce the working temperature of the first annular sealing ring 27, the second annular sealing ring 28 and the polytetrafluoroethylene sealing ring 29, thereby improving the sealing performance and service life.

[0049] In some alternative embodiments: See Figure 3 and Figure 4 As shown, the embodiment of the present application provides a one-way valve jet structure, in which a one-way valve mounting hole for mounting a one-way valve 23 and a spark plug threaded hole for mounting a spark plug 24 are provided at one end of a jet chamber adapter 21 close to a pre-combustion jet chamber 22. One end of a jet supply pipeline 34 extends into the one-way valve mounting hole and is sealed and connected to the mounting hole of the one-way valve 23 through a third sealing ring 38 to prevent leakage of the mixed gas. An outwardly expanding bellows is provided on the one-way valve 23, and the diameter of the bellows is slightly larger than the inner diameter of the one-way valve mounting hole. The one-way valve 23 and the one-way valve mounting hole on the jet chamber adapter 21 are connected by an interference fit of the bellows, so that the one-way valve 23 and the one-way valve mounting hole are in a good sealing state.

[0050] In some alternative embodiments: See Figure 3 and Figure 4 As shown, the embodiment of the present application provides a one-way valve jet structure, which also includes a gas rail bracket 36 for fixing the gas rail 31 on the cylinder head 13. The gas rail 31 and the gas rail bracket 36 are connected by bolts, and their function is to provide support and positioning for the gas rail 31. This fixing method can be used for natural gas engines, hydrogen engines and hydrogen-ammonia engines. For hydrogen engines, it includes both a main combustion chamber hydrogen rail and a jet chamber hydrogen rail. The use of the gas rail bracket 36 solves the problem of difficult layout of dual gas rails.

[0051] The adapter 33 is also fixed on the gas rail bracket 36. The bolts on the gas rail bracket 36 provide a clamping force to the gas rail 31, and then the gas nozzle 32 is pressed into the adapter 33, providing a clamping force between the gas nozzle 32 and the adapter 33. One end of the adapter 33 is sealed and connected to the gas nozzle 32 through a fourth sealing ring, so that the connection between the adapter 33 and the gas nozzle 32 is kept in a good sealing state. One end of the adapter 33 is sealed and connected to the jet supply pipeline 34 through a threaded ferrule.

[0052] In some alternative embodiments: See Figure 2 As shown, the embodiment of the present application provides a one-way valve jet structure, in which a sealing gasket 37 is provided at one end of the jet chamber adapter 21 away from the pre-combustion jet chamber 22 to press the jet chamber adapter 21 into the cylinder head 13 and is fixedly connected to the cylinder head cover 12, and a jet supply pipeline clamp 35 is provided on the jet supply pipeline 34 to fix the jet supply pipeline 34 on the cylinder head cover 12. The jet supply pipeline clamp 35 can not only fasten the jet supply pipeline 34 to the cylinder head cover 12, but also provide downward pressure to press the jet supply pipeline 34 against the third sealing ring 38 to keep the third sealing ring 38 working normally.

[0053] See also Figures 1 to 5 As shown, the second aspect of the embodiment of the present application provides an equivalence ratio active jet system, comprising:

[0054] The engine body 1 is connected with an intake pipe 2 and an exhaust pipe 3, the exhaust pipe 3 is connected with a supercharger 4, the supercharger 4 is coaxially connected with a compressor 5, and the compressor 5 is connected with the intake pipe 2. The exhaust gas discharged from the engine body 1 enters the supercharger 4 through the exhaust pipe 3 and then drives the supercharger 4 to rotate at a high speed. The supercharger 4 drives the compressor 5 to rotate synchronously to generate fresh compressed air. After the fresh compressed air enters the intake pipe 2, it participates in the mixed combustion of natural gas, hydrogen or hydrogen and ammonia.

[0055] The gas supply unit includes a gas injection valve 7 that pumps the fuel in the fuel tank 6 into the single mixer 8. The fuel tank 6 is preferably, but not limited to, a natural gas fuel tank. The natural gas can be liquefied natural gas (LNG) or compressed natural gas (CNG). The mixer 8 mixes the compressed air output by the compressor 5 and the natural gas fuel sprayed by the gas injection valve 7 and then inputs them into the intake pipeline 2. The intake pipeline 2 transports the mixed gas into the main combustion chamber to participate in combustion and work.

[0056] The pre-combustion injection unit includes a gas booster pump 9 connected to the mixer 8, the gas booster pump 9 is connected to the one-way valve jet structure described in any of the above embodiments, the gas booster pump 9 is connected to the gas rail 31 of the one-way valve jet structure, and the gas booster pump 9 is used to provide mixed gas to the gas rail 31. The pre-combustion jet unit 20 of the one-way valve jet structure extends into the engine body 1.

[0057] The pre-combustion injection unit and the gas supply unit of the embodiment of the present application both use natural gas as a single fuel, which reduces the complexity of the system and facilitates user use. The pre-combustion injection unit uses active jets to increase the ignition energy, accelerate the combustion of the mixed gas in the cylinder, improve the combustion efficiency, reduce premature gas emissions, and improve the engine efficiency. After the gas supply unit mixes the fuel in an equivalent ratio, the mixed gas is sprayed into the pre-combustion jet chamber 22 to avoid residual exhaust gas from being unable to be discharged, resulting in circulation changes or misfires.

[0058] In some alternative embodiments: See Figure 5 As shown, the embodiment of the present application provides an equivalence ratio active jet system, the exhaust pipe 3 of the equivalence ratio active jet system is connected to an EGR loop 11 for supplying EGR exhaust gas to the mixer 8, and an EGR valve 10 for controlling the flow of the EGR loop 11 is provided on the EGR loop 11, and the EGR valve 10 is controlled by the vehicle-mounted ECU. When the vehicle-mounted ECU controls the opening of the EGR valve 10, the exhaust gas discharged from the engine body 1 is reused. Part of the exhaust gas discharged by the engine body 1 is returned to the mixer 8 and re-enters the cylinder together with the fresh mixed gas. Since the exhaust gas contains a large amount of polyatomic gases such as CO2, and gases such as CO2 cannot burn but absorb a large amount of heat due to their high specific heat capacity, the maximum combustion temperature of the mixed gas in the cylinder is reduced, thereby reducing the amount of NOx generated.

[0059] How it works

[0060] The embodiment of the present application provides a one-way valve jet structure and an equivalent ratio active jet system thereof. Since the one-way valve jet structure of the present application is provided with a pre-combustion jet unit 20, the pre-combustion jet unit 20 includes a jet chamber adapter 21, one end of the jet chamber adapter 21 is coaxially connected to the pre-combustion jet chamber 22, a one-way valve 23 for spraying the mixture into the pre-combustion jet chamber 22, and a spark plug 24 for igniting the mixture in the pre-combustion jet chamber 22 are fixed at one end of the jet chamber adapter 21; a fuel supply unit 30, the fuel supply unit 30 includes a gas rail 31, the gas rail 31 is connected to a gas nozzle 32, the output end of the gas nozzle 32 is connected to a adapter 33, the adapter 33 is connected to a jet supply pipeline 34 extending into the jet chamber adapter 21 and connected to the one-way valve 23.

[0061] The one-way valve jet structure of the present application is composed of two parts: a pre-combustion jet unit 20 and a fuel supply unit 30, wherein the pre-combustion jet unit 20 is provided with a coaxially connected jet chamber adapter 21 and a pre-combustion jet chamber 22, and a one-way valve 23 for one-way jetting of the mixture toward the pre-combustion jet chamber 22 is provided in the jet chamber adapter 21, the one-way valve 23 prevents the flame in the pre-combustion jet chamber 22 from backfired, and a spark plug 24 for igniting the mixture in the pre-combustion jet chamber 22 is provided in the jet chamber adapter 21. When the jet chamber adapter 21 and the pre-combustion jet chamber 22 are installed in the cylinder head 13 of the engine body 1, it is an active jet for the main combustion chamber of the engine, which increases the ignition energy, accelerates the combustion of the mixture in the main combustion chamber, improves the combustion efficiency, reduces the premature gas emission, and improves the engine efficiency.

[0062] The fuel supply unit 30 is provided with a gas rail 31, a gas nozzle 32, an adapter 33 and a jet supply pipeline 34 for sequentially supplying a mixture to the one-way valve 23. The gas rail 31 is used to provide a mixture with stable pressure, the gas nozzle 32 is used to spray a set flow of the mixture into the pre-combustion jet chamber 22, the adapter 33 is used to connect the gas nozzle 32 and the jet supply pipeline 34, and the jet supply pipeline 34 is used to replace the gas nozzle 32 to directly spray the mixture into the pre-combustion jet chamber 22. In this way, the gas nozzle 32 with a larger volume and size is arranged outside the cylinder head 13, which reduces the difficulty of arranging the cylinder head 13, makes the volume of the pre-combustion jet chamber 22 smaller, and is easy to arrange and install. The cylinder head 13 is less modified, and the processing difficulty is reduced.

[0063] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0064] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A one-way valve jet structure, characterized in that: include: A pre-combustion jet unit (20), the pre-combustion jet unit (20) comprising a jet chamber adapter (21), one end of the jet chamber adapter (21) being coaxially connected to a pre-combustion jet chamber (22), a one-way valve (23) being fixedly provided on one end of the jet chamber adapter (21) connected to the pre-combustion jet chamber (22), and a spark plug (24) for igniting a mixture in the pre-combustion jet chamber (22); A fuel supply unit (30), the fuel supply unit (30) comprising a gas rail (31), the gas rail (31) being connected to a gas nozzle (32), the output end of the gas nozzle (32) being connected to an adapter (33), the adapter (33) being connected to a jet supply pipeline (34) extending into the jet chamber adapter (21) and communicating with the one-way valve (23); A first annular mounting groove is provided on the outer periphery of the pre-combustion jet chamber (22), a first annular sealing ring (27) is provided in the first annular mounting groove, and the first annular sealing ring (27) is used to seal the gap between the pre-combustion jet chamber (22) and the cylinder head (13); A second annular mounting groove is provided on the outer periphery of the jet chamber adapter (21), a second annular sealing ring (28) is provided in the second annular mounting groove, and the second annular sealing ring (28) is used to seal the gap between the jet chamber adapter (21) and the cylinder head (13); The jet chamber adapter (21) is provided with a one-way valve mounting hole for mounting the one-way valve (23) and a spark plug threaded hole for mounting the spark plug (24) at one end thereof close to the pre-combustion jet chamber (22); one end of the jet supply pipeline (34) extends into the one-way valve mounting hole and is sealedly connected to the one-way valve mounting hole via a third sealing ring (38); The one-way valve (23) is provided with a bellows ring that expands outwards, the diameter of the bellows ring is larger than the inner diameter of the one-way valve mounting hole, and the one-way valve (23) is connected to the one-way valve mounting hole on the jet chamber adapter (21) through an interference fit of the bellows ring; It also includes a gas rail bracket (36) for fixing the gas rail (31) on the cylinder head (13), the gas rail (31) and the gas rail bracket (36) are connected by bolts, the adapter (33) is fixed on the gas rail bracket (36), one end of the adapter (33) is sealed to the gas nozzle (32) via a fourth sealing ring, and one end of the adapter (33) is sealed to the jet supply pipeline (34) via a threaded sleeve.

2. A one-way valve jet structure as claimed in claim 1, characterized in that: The pre-combustion jet unit (20) further comprises an ignition coil (25) located at the other end of the jet chamber adapter (21); an ignition coil spacer (26) of the ignition coil (25) extends into the jet chamber adapter (21) and is connected to a spark plug (24).

3. A one-way valve jet structure as claimed in claim 1, characterized in that: The pre-combustion jet chamber (22) and the jet chamber adapter (21) are connected by plugging or threading, and a polytetrafluoroethylene sealing ring (29) is provided at the connection between the pre-combustion jet chamber (22) and the jet chamber adapter (21) for sealing.

4. A one-way valve jet structure as claimed in claim 1, characterized in that: A sealing gasket (37) is provided on one end of the jet chamber adapter (21) away from the pre-combustion jet chamber (22) for pressing the jet chamber adapter (21) into the cylinder head (13) and fixedly connected to the cylinder head cover (12), and a jet supply pipeline clamp (35) is provided on the jet supply pipeline (34) for fixing the jet supply pipeline (34) on the cylinder head cover (12).

5. An equivalence ratio active jet system, characterized in that: include: An engine body (1), the engine body (1) being connected to an intake pipeline (2) and an exhaust pipeline (3), the exhaust pipeline (3) being connected to a supercharger (4), the supercharger (4) being coaxially connected to a compressor (5), and the compressor (5) being connected to the intake pipeline (2); A gas supply unit, the gas supply unit comprising a gas injection valve (7) and a mixer (8), the mixer (8) mixing compressed air output by the compressor (5) and fuel sprayed by the gas injection valve (7) and then inputting the mixed mixture into the intake pipeline (2); A pre-combustion injection unit, the pre-combustion injection unit comprising a gas booster pump (9) connected to the mixer (8), the gas booster pump (9) being connected to the one-way valve jet structure according to any one of claims 1 to 4, the pre-combustion jet unit (20) of the one-way valve jet structure extending into the engine body (1).

6. An equivalence ratio active jet system as claimed in claim 5, characterized in that: The exhaust pipe (3) is connected to an EGR circuit (11) for supplying EGR exhaust gas to the mixer (8), and the EGR circuit (11) is provided with an EGR valve (10) for controlling the flow rate of the EGR circuit (11).

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