Pre-chamber ignition system of engine, system control method of pre-chamber ignition system and related equipment

Abstract

The invention relates to the technical field of engine starting control, and provides a pre-combustion chamber ignition system of an engine, a system control method of the pre-combustion chamber ignition system and related equipment. The pre-combustion chamber ignition system of the engine comprises a pre-combustion chamber ignition assembly, a cam plunger assembly, a cam valve assembly and an air inlet assembly. The pre-combustion chamber ignition assembly, the cam plunger assembly, the cam valve assembly and the air inlet assembly are assembled on the top of a main combustion chamber of the engine through a cylinder cover. An air cavity of the pre-combustion chamber ignition assembly is in clearance fit with a plunger of the cam plunger assembly, an air valve of the cam air valve assembly is assembled in an air inlet channel of the air inlet assembly, a cam air valve spring is arranged outside the cam air valve assembly in a winding mode, and the cam air valve spring is clamped on a protruding structure outside the air inlet assembly. The cam valve assembly and the air inlet assembly are fixed.

Description

Technical Field

[0001] The present invention relates to the technical field of engine starting control, and in particular to an engine pre-combustion chamber ignition system, a control method for an engine pre-combustion chamber ignition system, a control device for an engine pre-combustion chamber ignition system, an electronic device, and a computer-readable storage medium. Background Art

[0002] When the engine is cold-started, the low-temperature intake air and fuel will cause the mixture concentration to be high and combustion to be incomplete. At this time, the vehicle's exhaust temperature is low, which reduces the processing efficiency of the after-treatment system, and further leads to a significant increase in vehicle emissions. For this reason, setting a pre-combustion chamber on the engine can effectively achieve the purpose of improving the engine's thermal efficiency and low emissions.

[0003] In actual operation, there are many operating conditions for engine operation. However, the pre-combustion chamber jet ignition system used in related technologies can only achieve high efficiency and low emissions for the engine under one operating condition, and cannot meet the different requirements of the engine for the mixture concentration and pressure in the pre-combustion chamber under different operating modes. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an engine pre-combustion chamber ignition system that can be applied to multiple operating modes to achieve efficient and clean combustion of the engine.

[0005] In the first aspect, an embodiment of the present application provides a pre-combustion chamber ignition system of an engine, comprising: a pre-combustion chamber ignition assembly, a cam plunger assembly, a cam valve assembly and an intake assembly, wherein the pre-combustion chamber ignition assembly, the cam plunger assembly, the cam valve assembly and the intake assembly are assembled on the top of the main combustion chamber of the engine through the cylinder head; the front air cavity of the pre-combustion chamber ignition assembly is matched with the plunger clearance of the cam plunger assembly, the valve of the cam valve assembly is assembled inside the intake channel of the intake assembly, and a cam valve spring is wound around the outside of the cam valve assembly, and the cam valve spring is clamped on the raised structure on the outside of the intake assembly to fix the cam valve assembly and the intake assembly.

[0006] In some embodiments, the pre-combustion chamber ignition assembly includes a pre-combustion chamber injector, a spark plug, a first air duct, a front air chamber, a mixture chamber, a glow plug, a one-way valve, a second air duct and a pre-combustion chamber; the front air chamber is connected to the interior of the intake channel of the intake assembly through the first air duct, the pre-combustion chamber injector is connected to the mixture chamber, the mixture chamber is connected to the front air chamber, the mixture chamber is connected to the pre-combustion chamber through the second air duct, the glow plug is arranged inside the mixture chamber, the one-way valve is arranged in the second air duct, the spark plug is connected to the pre-combustion chamber, and a pre-combustion chamber through hole is arranged at the bottom of the pre-combustion chamber.

[0007] In some embodiments, the cam plunger assembly includes a first cam, a first camshaft, a first plunger platform, a cam plunger spring, and a cam plunger spring seat; one end of the cam plunger spring is connected to the first plunger platform, and the other end of the cam plunger spring is connected to the cam plunger spring seat. The cam plunger spring is wound around the outside of the plunger, and the first camshaft drives the first cam to roll. The first cam is in rolling contact with the first plunger platform to rollingly squeeze the first plunger platform to rollingly compress the cam plunger spring; wherein, the first cam is coupled to the first camshaft.

[0008] In some embodiments, the cam valve assembly includes a second cam, a second camshaft, a second plunger platform, a cam valve spring, and a cam valve spring seat; one end of the cam valve spring is connected to the second plunger platform, and the other end of the cam valve spring is connected to the cam valve spring seat. The cam valve spring is wound around the outside of the valve, and the second camshaft drives the second cam to roll. The second cam is in rolling contact with the second plunger platform to rollingly squeeze the second plunger platform to rollingly compress the cam valve spring; wherein the second cam cooperates with the surface of the second camshaft.

[0009] In some embodiments, the intake assembly includes an intake injector, an intake passage, and a valve seat ring; the intake injector is connected to the intake passage, and the intake assembly is fixed to the cylinder head through the valve seat ring.

[0010] In a second aspect, an embodiment of the present application provides a control method for a pre-combustion chamber ignition system of an engine, which is applied to the pre-combustion chamber ignition system of the above-mentioned engine, including: determining whether the engine is in a starting condition; if the engine is in a starting condition, controlling the glow plug to start working to heat the mixture in the mixture chamber, and controlling the operation of the pre-combustion chamber injector.

[0011] In some embodiments, if the engine is not in a starting condition, determine whether the engine is in an equivalent ratio combustion condition; if the engine is in an equivalent ratio combustion condition, determine whether the engine is in a high load condition; control the pre-combustion chamber injector to stop working to stop injecting fuel into the mixture chamber; if the engine is not in an equivalent ratio combustion condition, control the pre-combustion chamber injector to work with a preset injection pulse width.

[0012] In a third aspect, an embodiment of the present application provides a control device for a pre-combustion chamber ignition system of an engine, comprising: a judgment module configured to determine whether the engine is in a starting condition; a control module configured to control the glow plug to start working to heat the mixture in the mixture chamber and control the operation of the pre-combustion chamber injector in response to the engine being in a starting condition.

[0013] In a fourth aspect, an embodiment of the present application provides an electronic device comprising: a processor and a memory, the memory storing programs or instructions that can be run on the processor, and the steps of the control method of the pre-combustion chamber ignition system of the engine described in the second aspect being implemented when the program or instructions are executed by the processor.

[0014] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the control method of the pre-combustion chamber ignition system of the engine as described in the second aspect are implemented.

[0015] The technical solution provided in this application highly integrates the pre-combustion chamber point assembly, cam plunger assembly, cam valve assembly and intake assembly on the cylinder head at the upper end of the engine's main combustion chamber to achieve pressurization and heating of the mixture in the pre-combustion chamber, thereby optimizing the formation of the mixture in the pre-combustion chamber. At the same time, corresponding operating modes are set for various operating conditions of the pre-combustion chamber ignition system, which can further optimize the combustion efficiency of the engine under different operating conditions and improve the economy of engine operation.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 A schematic structural diagram of an engine pre-combustion chamber ignition system provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the pre-combustion chamber ignition assembly provided in an embodiment of the present application; Figure 3 A schematic structural diagram of a cam plunger assembly provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a cam valve assembly provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of the air intake assembly provided in an embodiment of the present application; Figure 6 A schematic structural diagram of the main combustion chamber assembly provided in an embodiment of the present application; Figure 7 A flow chart of a control method for an engine pre-combustion chamber ignition system provided in an embodiment of the present application; Figure 8 A schematic diagram of a control device for an engine pre-combustion chamber ignition system according to an embodiment of the present application; Figure 9 A schematic diagram of an electronic device provided in an embodiment of the present application.

[0018] Figure 1: 100-pre-combustion chamber ignition assembly; 200-cam plunger assembly; 300-cam valve assembly; 400-intake assembly; 500-main combustion chamber assembly; 1-pre-combustion chamber injector; 2-spark plug; 3-first air passage; 4-pre-air cavity; 5-housing; 6-glow plug; 7-mixture chamber; 8-one-way valve; 9-second air passage; 10-pre-combustion chamber; 11-pre-combustion chamber through hole; 12-first cam; 13-first camshaft; 14-first plunger platform; 15-cam plunger spring; 16-plunger; 17- Cam plunger spring seat; 18-second cam; 19-second camshaft; 20-second plunger platform; 21-cam valve spring; 22-cam valve spring seat; 23-valve; 24-intake injector; 25-intake passage; 26-cylinder head; 27-valve seat ring; 28-main combustion chamber; 29-piston; 30-cylinder body; 31-raised structure; 810-judgment module; 820-control module; 910-processor; 920-memory; 930-input / output interface; 940-communication interface; 950-bus. DETAILED DESCRIPTION

[0019] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are for illustrative purposes only and are not intended to limit the scope of protection of the present application.

[0020] It should be understood that the various steps described in the method embodiments of the present application can be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0021] The following describes in detail the pre-combustion chamber ignition system of the engine provided according to the embodiments of the present application with reference to the accompanying drawings.

[0022] refer to Figures 1-6As shown, the pre-combustion chamber ignition system of the engine includes a pre-combustion chamber ignition assembly 100, a cam plunger assembly 200, a cam valve assembly 300 and an intake assembly 400. The pre-combustion chamber ignition assembly 100, the cam plunger assembly 200, the cam valve assembly 300 and the intake assembly 400 are assembled on the top of the main combustion chamber 28 of the engine through the cylinder head 26; the front air cavity 4 of the pre-combustion chamber ignition assembly 100 is clearance-matched with the plunger 16 of the cam plunger assembly 200, and the valve 23 of the cam valve assembly 300 is assembled inside the intake channel 25 of the intake assembly 400. A cam valve spring 21 is wound around the outside of the cam valve assembly 300, and the cam valve spring 21 is clamped on the protruding structure 31 on the outside of the intake assembly 400 to fix the cam valve assembly 300 and the intake assembly 400.

[0023] Specifically, the pre-chamber ignition assembly 100 is the core ignition source of the pre-chamber ignition system, which can enable the engine to perform initial combustion and provide ignition energy for the subsequent flame jet sprayed into the main combustion chamber; the cam plunger assembly 200 is the driving mechanism for fuel injection of the pre-chamber ignition system, which can accurately control the air-fuel ratio in the pre-chamber 10, achieve lean combustion and produce a strong flame jet; the cam valve assembly 300 is used to control the opening or closing of the channel connecting the pre-chamber ignition assembly 100 and the main combustion chamber 28, wherein the connecting channel can be a nozzle or a valve; the intake assembly 400 can introduce air into the main combustion chamber 28 to provide the main combustion chamber with the oxidant required for combustion.

[0024] The pre-combustion chamber ignition assembly 100, the cam plunger assembly 200, the cam valve assembly 300 and the intake assembly 400 are integrated and assembled on the top of the cylinder head 26, directly above the main combustion chamber, so as to minimize the distance between the cam plunger assembly 200, the cam valve assembly 300 and the intake assembly 400 and the pre-combustion chamber 10 and the main combustion chamber 28, thereby improving space utilization. At the same time, the rigidity and strength of the cylinder head 26 are used to support the pre-combustion chamber ignition assembly 100, the cam plunger assembly 200, the cam valve assembly 300 and the intake assembly 400, ensuring that the pre-combustion chamber ignition assembly 100, the cam plunger assembly 200, the cam valve assembly 300 and the intake assembly 400 maintain precise positioning and stability under the high stress environment of the engine operation, thereby reducing the impact caused by vibration and deformation.

[0025] The air cavity of the pre-combustion chamber ignition assembly 100 is clearance-matched with the plunger 16 of the cam plunger assembly 200, so that the cam plunger assembly 200 can smoothly move radially during operation to drive the pre-combustion chamber ignition assembly 100; the valve 23 of the cam valve assembly 300 is assembled inside the intake channel 25 of the intake assembly 400, and the timing of air entering the engine cylinder is controlled by controlling the valve 23, and the amount of air entering the engine cylinder can also be controlled to ensure that the requirements of lean combustion can be met. ; A cam valve spring 21 is wound around the outside of the cam valve assembly 300, which is used to pull the valve 23 back to its original position to ensure that the main combustion chamber 28 is in a closed state; the cam valve spring 21 is clamped on the raised structure 31 on the outside of the intake assembly 400 to fix the cam valve assembly 300 and the intake assembly 400, and determine the radial movement path of the cam valve spring 21, so that the cam valve assembly 300 can move stably along the radial direction of the valve 23, further ensuring the stability of the ignition system operation.

[0026] As an optional embodiment, refer to Figure 2 As shown, the pre-combustion chamber ignition assembly 100 includes a pre-combustion chamber injector 1, a spark plug 2, a first air duct 3, a front air chamber 4, a mixture chamber 7, a glow plug 6, a one-way valve 8, a second air duct 9, and a pre-combustion chamber 10; the front air chamber 4 is connected to the inside of the intake channel 25 of the intake assembly 400 through the first air duct 3, the pre-combustion chamber injector 1 is connected to the mixture chamber 7, the mixture chamber 7 is connected to the front air chamber 4, the mixture chamber 7 is connected to the pre-combustion chamber 10 through the second air duct 9, the glow plug 6 is arranged inside the mixture chamber 7, the one-way valve 8 is arranged in the second air duct 9, the spark plug 2 is connected to the pre-combustion chamber 10, and a pre-combustion chamber through hole 11 is arranged at the bottom of the pre-combustion chamber 10.

[0027] Specifically, the front air chamber 4 is connected to the inside of the intake channel 25 of the intake assembly 400 through the first air channel 3, so that air can enter the front air chamber 4 through the first air channel 3; the mixture chamber 7 is connected to the front air chamber 4, so that air can further enter the mixture chamber 7 and mix with the fuel gas to form a mixture; the pre-combustion chamber injector 1 is assembled inside the mixture chamber 7, so that the pre-combustion chamber injector 1 can inject fuel into the mixture chamber 7 and mix with the air to form a mixture. The pre-combustion chamber injector 1 and the mixture chamber 7 are simultaneously assembled on the engine housing 5 to form a stable structure to avoid the vibration generated when the engine is running to affect the pre-combustion chamber injector 1 and the mixture chamber 7; the mixture chamber 7 is connected with the pre-combustion chamber 10 through the second air duct 9, so that the mixture can enter the pre-combustion chamber 10 through the second air duct 9 for ignition; the glow plug 6 is arranged inside the mixture chamber 7, and can heat the mixture in the mixture chamber 7; the one-way valve 8 is arranged in the second air duct 9, and is used to control the mixture to flow only from the mixture chamber 7 to the combustion chamber, so as to avoid the burning mixture from inverting and damaging the glow plug 6; the spark plug 2 is connected with the pre-combustion chamber 10, and is used to ignite the mixture in the pre-combustion chamber 10; a pre-combustion chamber through hole 11 is provided at the bottom of the pre-combustion chamber 10, and the ignited mixture further enters the main combustion chamber 28 through the pre-combustion chamber through hole 11 to realize combustion.

[0028] As an optional embodiment, refer to Figure 3 As shown, the cam plunger assembly 200 includes a first cam 12, a first camshaft 13, a first plunger platform 14, a cam plunger spring 15, and a cam plunger spring seat 17; one end of the cam plunger spring 15 is connected to the first plunger platform 14, and the other end of the cam plunger spring 15 is connected to the cam plunger spring seat 17. The cam plunger spring 15 is wound around the outside of the plunger 16, and the first camshaft 13 drives the first cam 12 to roll. The first cam 12 is in rolling contact with the first plunger platform 14 to roll and squeeze the first plunger platform 14 to roll and compress the cam plunger spring 15; wherein, the first cam 12 and the first camshaft 13 are in a coupling type.

[0029] Specifically, the first camshaft 13 can drive the first cam 12 to roll, wherein the first cam 12 and the first camshaft 13 are in a coupling type. When the engine is working, the first camshaft 13 rotates under the drive of the crankshaft to transmit the torque to the first cam 12; one end of the cam plunger spring 15 is connected to the first plunger platform 14, and the other end of the cam plunger spring 15 is connected to the cam plunger spring seat 17. The cam plunger spring 15 is wound around the outside of the plunger 16. The first plunger platform 14, the cam plunger spring seat 17 and the plunger 16 jointly support the cam plunger. The spring 15 is limited so that the cam plunger spring 15 can move radially along the plunger 16; the cam plunger spring seat 17 is assembled on the engine housing 5 to form a stable structure to prevent the vibration generated when the engine is running from affecting the connection of the components in the cam plunger assembly 200; the first cam 12 is in rolling contact with the first plunger platform 14. When the engine runs to the intake stroke, the first cam 12 begins to roll and squeeze the first plunger platform 14, further rolling and compressing the cam plunger spring 15, driving the injector to spray fuel during the intake stroke.

[0030] As an optional embodiment, refer to Figure 4 As shown, the cam valve assembly 300 includes a second cam 18, a second camshaft 19, a second plunger platform 20, a cam valve spring 21, and a cam valve spring seat 22; one end of the cam valve spring 21 is connected to the second plunger platform 20, and the other end of the cam valve spring 21 is connected to the cam valve spring seat 22. The cam valve spring 21 is wound around the outside of the valve 23. The second camshaft 19 drives the second cam 18 to roll, and the second cam 18 is in rolling contact with the second plunger platform 20 to roll and squeeze the second plunger platform 20 to roll and compress the cam valve spring 21; wherein, the second cam 18 is surface-matched with the second camshaft 19.

[0031] Specifically, the second camshaft 19 can drive the second cam 18 to roll, wherein the second cam 18 cooperates with the surface of the second camshaft 19. When the engine is working, the second camshaft 19 rotates under the drive of the crankshaft to transmit torque to the second cam 18; one end of the cam valve spring 21 is connected to the second plunger platform 20, and the other end of the cam valve spring 21 is connected to the cam valve spring seat 22. The cam valve spring 21 is wound around the outside of the valve 23. The second plunger platform 20, the cam valve spring seat 22 and the valve 23 jointly limit the cam valve spring 21 so that the cam valve spring 21 can move radially along the valve 23; the second cam 18 plunger 16 is in rolling contact with the second plunger platform 20. When the engine runs to the intake stroke, the second cam 18 begins to roll and squeeze the second plunger platform 20, and further compresses the cam valve spring 21 by rolling, so that the valve 23 moves in the radial direction, so that air can enter the main combustion chamber 28.

[0032] As an optional embodiment, refer to Figure 5 As shown, the intake assembly 400 includes an intake injector 24 , an intake passage 25 and a valve seat ring 27 ; the intake injector 24 is connected to the intake passage 25 , and the intake assembly 400 is fixed to the cylinder head 26 through the valve seat ring 27 .

[0033] Specifically, the intake injector 24 is connected to the intake passage 25, and can inject fuel into the intake passage 25 to mix with the air in the intake passage 25 to form a mixture. The intake assembly 400 is connected to the cylinder head 26 through the valve seat ring 27, wherein the valve seat ring 27 and the cylinder head 26 can be fixedly connected or detachably connected, so that the intake assembly 400 and the cylinder head 26 can be tightly connected to form a stable structure.

[0034] As an optional embodiment, refer to Figure 6 As shown, the pre-combustion chamber ignition system of the engine further includes a main combustion chamber 28 assembly 500 , and the main combustion chamber 28 assembly 500 includes the main combustion chamber 28 , the piston 29 and the cylinder block 30 .

[0035] Specifically, the cylinder head 26 and the cylinder body 30 jointly limit the main combustion chamber 28 area, and the piston 29 is arranged inside the cylinder body 30. The top surface of the piston 29 directly bears the explosion pressure after the jet in the pre-combustion chamber 10 is ignited, further converting thermal energy into mechanical energy to drive the engine to operate.

[0036] According to the pre-combustion chamber ignition system of the engine provided in the embodiment of the present application, the pre-combustion chamber point assembly, cam plunger assembly, cam valve assembly and intake assembly are highly integrated on the cylinder head at the upper end of the main combustion chamber of the engine to pressurize and heat the mixture in the pre-combustion chamber, optimize the formation of the mixture in the pre-combustion chamber, enable the mixture in the pre-combustion chamber to be fully burned when the engine is started, and further enable the mixture in the main combustion chamber to be fully burned, thereby reducing the generation of exhaust gas.

[0037] refer to Figure 7 , which is a flow chart of a control method for a pre-combustion chamber ignition system of an engine provided in an embodiment of the present application.

[0038] Step S701, determining whether the engine is in a starting state; Step S702: If the engine is in the starting state, the glow plug is controlled to start working to heat the mixture in the mixture chamber, and the pre-combustion chamber injector is controlled to work.

[0039] Specifically, when the engine is started, the glow plug begins to heat up, and at the same time the pre-combustion chamber injector sprays fuel into the mixture chamber, which can increase the initial temperature and concentration of the mixture in the mixture chamber, thereby improving the success rate of ignition. At the same time, it is beneficial to reduce the emission of harmful gases caused by incomplete combustion of gases generated by low temperatures during starting conditions.

[0040] When the engine starts, the first camshaft and the second camshaft rotate with the engine crankshaft, thereby driving the radial movement of the valve and the plunger. There is a phase deviation between the first camshaft and the second camshaft, so that the first camshaft starts to squeeze the first plunger platform to compress the cam plunger spring only after the valve returns to the valve seat ring, which can prevent fuel from entering the intake duct and at the same time utilize the rising cylinder pressure environment to optimize atomization and achieve lean combustion.

[0041] Furthermore, when the engine runs into the intake stroke, the second camshaft begins to squeeze the second plunger platform, and the valve moves away from the valve seat in the radial direction. Furthermore, the intake injector injects fuel into the intake duct, and the fuel mixes with the air in the intake duct to form a mixture, which further enters the main combustion chamber through the valve. Further, when the second camshaft runs over the cam and no longer squeezes the second plunger platform, the engine now runs into the compression stroke, and the first camshaft begins to squeeze the first plunger platform. At this time, the plunger moves downward in the radial direction, so that the plunger blocks the first air passage, thereby preventing the gas in the intake duct from flowing into the mixture chamber. Since the plunger moves downward in the radial direction and the first air passage is not connected to the intake duct, the air pressure in the mixture chamber increases, prompting the one-way valve to open. At this time, the mixture in the mixture chamber can enter the pre-combustion chamber through the second air passage. After further ignition by the spark plug, the mixture is ignited in the pre-combustion chamber and then ejected into the main combustion chamber through the pre-combustion chamber through the through hole, thereby igniting the mixture flowing into the main combustion chamber from the valve, thereby achieving stable operation of the engine.

[0042] As an optional embodiment, the control method of the engine's pre-combustion chamber ignition system also includes: if the engine is not in a starting condition, determining whether the engine is in an equivalent ratio combustion condition; if the engine is in an equivalent ratio combustion condition, determining whether the engine is in a high load condition; if the engine is in a high load condition, controlling the pre-combustion chamber injector to stop working to stop injecting fuel into the mixture chamber; if the engine is not in an equivalent ratio combustion condition, controlling the pre-combustion chamber injector to work with a preset injection pulse width.

[0043] Specifically, if the engine is not in the starting condition, it is determined whether the engine is in the equivalence ratio combustion condition.

[0044] The equivalence ratio combustion condition is an ideal condition. At this time, the theoretical combustion products are clean, and only carbon dioxide, water, and nitrogen are generated. However, due to the imperfect actual combustion process, a small amount of carbon monoxide and hydrocarbons will still be produced. At the same time, a large amount of nitrogen oxides will also be generated, causing pollution to the environment.

[0045] If the engine is not in the equivalent ratio combustion condition at this time, the injector is controlled to start and the injection pulse width is extended to the preset injection pulse width to increase the energy of the jet ignition and further increase the lean burn limit of the main combustion chamber.

[0046] If the engine is in an equivalence ratio combustion condition at this time, then continue to obtain whether the current state of the engine is a high load condition.

[0047] If the engine is not under high load at this time, the working state of the pre-combustion chamber ignition system is controlled to remain unchanged.

[0048] If the engine is under high load at this time, the fuel injector is controlled to stop working so that only air exists in the mixture chamber, which can prevent the occurrence of problems such as knock caused by the high ignition energy of the jet.

[0049] As an optional embodiment, if the engine is in a lean burn condition, the pre-combustion chamber injector is controlled to start, the mixture in the pre-combustion chamber is ignited by the spark plug, and the flame is ejected into the main combustion chamber through the pre-combustion chamber through the hole, further igniting the mixture in the main combustion chamber; when the excess air coefficient is further increased, the concentration of the mixture in the main combustion chamber is reduced, and spark plug ignition becomes difficult. At this time, the stability of combustion is reduced. The injection pulse width of the pre-combustion chamber injector can be increased to increase the fuel injected into the pre-combustion chamber, thereby increasing the combustion intensity of the pre-combustion chamber, further improving the energy of the jet flame, and igniting the mixture with lower concentration in the main combustion chamber by the high-energy flame, thereby improving the lean burn limit of the main combustion chamber.

[0050] According to the control method of the pre-combustion chamber ignition system of the engine provided in the embodiment of the present application, the pre-combustion chamber point assembly, cam plunger assembly, cam valve assembly and intake assembly are highly integrated on the cylinder head at the upper end of the main combustion chamber of the engine to achieve pressurization and heating of the mixture in the pre-combustion chamber, thereby optimizing the formation of the mixture in the pre-combustion chamber. At the same time, corresponding operating modes are set for various operating conditions of the pre-combustion chamber ignition system, which can further optimize the combustion efficiency of the engine under different operating conditions and improve the economy of engine operation.

[0051] refer to Figure 8 , which is a schematic diagram of a control device for a pre-combustion chamber ignition system of an engine provided in an embodiment of the present application.

[0052] Based on the same concept, corresponding to the control method of the pre-combustion chamber ignition system of the engine provided in any of the above embodiments, the present application also provides a control device of the pre-combustion chamber ignition system of the engine.

[0053] The control device of the pre-combustion chamber ignition system of the engine includes a judgment module 810 and a control module 820 .

[0054] The judgment module 810 is configured to determine whether the engine is in the starting condition; the control module 820 is configured to control the glow plug to start working to heat the mixture in the mixture chamber and control the pre-combustion chamber injector to work in response to the engine being in the starting condition.

[0055] In some embodiments, the control module 820 is further configured to determine whether the engine is in an equivalent ratio combustion condition if the engine is not in a starting condition; determine whether the engine is in a high load condition if the engine is in an equivalent ratio combustion condition; if the engine is in a high load condition, control the glow plug to stop working to stop heating the mixture in the mixture chamber; if the engine is not in an equivalent ratio combustion condition, control the pre-combustion chamber injector to operate with a preset injection pulse width.

[0056] According to the control device of the pre-combustion chamber ignition system of the engine provided in the embodiment of the present application, the pre-combustion chamber point assembly, cam plunger assembly, cam valve assembly and intake assembly are highly integrated on the cylinder head at the upper end of the main combustion chamber of the engine to achieve pressurization and heating of the mixture in the pre-combustion chamber, thereby optimizing the formation of the mixture in the pre-combustion chamber. At the same time, corresponding operating modes are set for various operating conditions of the pre-combustion chamber ignition system, which can further optimize the combustion efficiency of the engine under different operating conditions and improve the economy of engine operation.

[0057] Based on the same concept, corresponding to the control method of the pre-combustion chamber ignition system of the engine provided in any of the above embodiments, the present application also provides an electronic device, including a processor and a memory, wherein the above memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the control method of the pre-combustion chamber ignition system of the engine as in the second aspect are implemented.

[0058] Figure 9 A more specific hardware structure diagram of an electronic device provided in an embodiment of the present application is shown. The device may include: a processor 910, a memory 920, an input / output interface 930, a communication interface 940, and a bus 950. The processor 910, the memory 920, the input / output interface 930, and the communication interface 940 are connected to each other within the device via the bus 950.

[0059] The processor 910 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0060] The memory 920 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 920 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 920 and is called and executed by the processor 910.

[0061] The input / output interface 930 is used to connect to an input / output module to enable information input and output. The input / output module can be configured as a component within the device (not shown) or can be externally connected to the device to provide corresponding functions. Input devices may include a keyboard, mouse, touch screen, microphone, various sensors, etc. Output devices may include a display, speaker, vibrator, indicator light, etc.

[0062] The communication interface 940 is used to connect to a communication module (not shown) to enable communication between the device and other devices. The communication module can communicate via wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, Wi-Fi, Bluetooth, etc.).

[0063] The bus 950 comprises a pathway for transmitting information between various components of the device, such as the processor 910 , the memory 920 , the input / output interface 930 , and the communication interface 940 .

[0064] It should be noted that although the above device only shows the processor 910, the memory 920, the input / output interface 930, the communication interface 940, and the bus 950, in a specific implementation, the device may also include other components necessary for normal operation. In addition, it will be understood by those skilled in the art that the above device may only include the components necessary to implement the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0065] The electronic device of the above embodiment is used to implement the control method of the pre-combustion chamber ignition system of the corresponding engine in any of the above embodiments, and has the beneficial effects of the corresponding control method embodiment of the pre-combustion chamber ignition system of the engine, which will not be repeated here.

[0066] Based on the same concept, corresponding to the control method of the pre-combustion chamber ignition system of the engine provided in any of the above embodiments, the present application also provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by the processor, the steps of the control method of the pre-combustion chamber ignition system of the engine as in the second aspect are implemented.

[0067] The above-mentioned computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSDs)), etc.

[0068] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the control method of the pre-combustion chamber ignition system of the corresponding engine in any of the above embodiments, and have the beneficial effects of the corresponding engine pre-combustion chamber ignition system control method embodiment, which will not be repeated here.

[0069] Based on the same concept, corresponding to the control method of the pre-combustion chamber ignition system of the engine provided in any of the above embodiments, the present application also provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by the processor, the steps of the control method of the pre-combustion chamber ignition system of the engine as in the second aspect are implemented.

[0070] The above-mentioned computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSDs)), etc.

[0071] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the control method of the pre-combustion chamber ignition system of the corresponding engine in any of the above embodiments, and have the beneficial effects of the corresponding engine pre-combustion chamber ignition system control method embodiment, which will not be repeated here.

[0072] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0073] Through the above description of the embodiments, those skilled in the art will clearly understand that the methods of the above embodiments can be implemented using a computer software product and the necessary general-purpose hardware platform, or alternatively, hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for causing a terminal or network-side device to execute the methods described in the various embodiments of this application.

[0074] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A pre-combustion chamber ignition system for an engine, characterized in that: The invention comprises a pre-combustion chamber ignition assembly (100), a cam plunger assembly (200), a cam valve assembly (300) and an intake assembly (400), wherein the pre-combustion chamber ignition assembly (100), the cam plunger assembly (200), the cam valve assembly (300) and the intake assembly (400) are assembled on the top of the main combustion chamber (28) of the engine through a cylinder head (26); The front air cavity (4) of the pre-combustion chamber ignition assembly (100) is loosely matched with the plunger (16) of the cam plunger assembly (200); the valve (23) of the cam valve assembly (300) is assembled inside the intake passage (25) of the intake assembly (400); a cam valve spring (21) is wound around the outside of the cam valve assembly (300); the cam valve spring (21) is clamped on a protruding structure (31) outside the intake assembly (400) to fix the cam valve assembly (300) and the intake assembly (400).

2. The engine pre-combustion chamber ignition system according to claim 1, characterized in that: The pre-combustion chamber ignition assembly (100) comprises a pre-combustion chamber injector (1), a spark plug (2), a first air passage (3), the pre-air chamber (4), a mixed air chamber (7), a glow plug (6), a one-way valve (8), a second air passage (9) and a pre-combustion chamber (10); The front air chamber (4) is connected to the inside of the intake channel (25) of the intake assembly (400) through the first air duct (3), the pre-combustion chamber injector (1) is connected to the mixture chamber (7), the mixture chamber (7) is connected to the front air chamber (4), the mixture chamber (7) is connected to the pre-combustion chamber (10) through the second air duct (9), the glow plug (6) is arranged inside the mixture chamber (7), the one-way valve (8) is arranged in the second air duct (9), the spark plug (2) is connected to the pre-combustion chamber (10), and a pre-combustion chamber through hole (11) is arranged at the bottom of the pre-combustion chamber (10).

3. The engine pre-combustion chamber ignition system according to claim 1, characterized in that: The cam plunger assembly (200) comprises a first cam (12), a first cam shaft (13), a first plunger platform (14), a cam plunger spring (15), and a cam plunger spring seat (17); One end of the cam plunger spring (15) is connected to the first plunger platform (14), and the other end of the cam plunger spring (15) is connected to the cam plunger spring seat (17). The cam plunger spring (15) is wound around the outside of the plunger (16). The first camshaft (13) drives the first cam (12) to roll. The first cam (12) and the first plunger platform (14) are in rolling contact to roll and squeeze the first plunger platform (14) to roll and compress the cam plunger spring (15); wherein, the first cam (12) and the first camshaft (13) are in a shaft-connected manner.

4. The engine pre-combustion chamber ignition system according to claim 1, characterized in that: The cam valve assembly (300) includes a second cam (18), a second camshaft (19), a second plunger platform (20), the cam valve spring (21), and a cam valve spring seat (22); One end of the cam valve spring (21) is connected to the second plunger platform (20), and the other end of the cam valve spring (21) is connected to the cam valve spring seat (22). The cam valve spring (21) is wound around the outside of the valve (23). The second camshaft (19) drives the second cam (18) to roll. The second cam (18) and the second plunger platform (20) are in rolling contact to roll and squeeze the second plunger platform (20) to roll and compress the cam valve spring (21); wherein, the second cam (18) and the second camshaft (19) are surface-matched.

5. The engine pre-combustion chamber ignition system according to claim 1, characterized in that: The intake assembly (400) includes an intake fuel injector (24), an intake passage (25), and a valve seat ring (27); The intake fuel injector (24) is in communication with the intake passage (25), and the intake assembly (400) is fixed on the cylinder head (26) via the valve seat ring (27).

6. A method for controlling a pre-combustion chamber ignition system of an engine, characterized in that: The pre-combustion chamber ignition system for an engine according to any one of claims 1 to 5, the method comprising: Determine whether the engine is in the starting condition; If the engine is in a starting condition, the glow plug is controlled to start working to heat the mixed gas in the mixed gas chamber, and the pre-combustion chamber injector is controlled to work.

7. The control method of the pre-combustion chamber ignition system according to claim 6, characterized in that: The method further comprises: If the engine is not in the starting state, determining whether the engine is in the stoichiometric combustion state; If the engine is in an equivalence ratio combustion condition, determining whether the engine is in a high load condition; If the engine is in a high-load operating condition, controlling the pre-combustion chamber injector to stop working so as to stop injecting fuel into the mixture chamber; If the engine is not in an equivalence ratio combustion condition, the pre-combustion chamber injector is controlled to operate with a preset injection pulse width.

8. A control device for a pre-combustion chamber ignition system of an engine, characterized in that: include: A judgment module is configured to determine whether the engine is in a starting state; The control module is configured to control the glow plug to start operating to heat the mixture in the mixture chamber and control the pre-combustion chamber injector to operate in response to the engine being in a starting state.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the control method of the pre-combustion chamber ignition system of the engine according to any one of claims 6 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the control method of the pre-combustion chamber ignition system of the engine as described in any one of claims 6 to 7 are implemented.

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