Combustion system for an internal combustion engine and internal combustion engine
By designing a tumble combustion system and fuel injectors, the limitations imposed by the shape of the intake pipe on the intake volume are resolved, achieving uniform mixing and rapid diffusion of fuel and air, thereby improving the performance and combustion efficiency of the internal combustion engine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEICHAI POWER CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-21
AI Technical Summary
In existing internal combustion engine combustion systems, the internal shape of the intake pipe hinders the increase of intake volume, affects the diffusion and distribution of the fuel-air mixture in the combustion chamber, and thus limits the improvement of internal combustion engine performance.
The system employs a tumble combustion system, which uses the coordination between the intake pipe and the combustion chamber to create tumble motion. Combined with the intersection of the fuel injector's injection direction and the central plane, it organizes the mixing of fuel and air, avoids the influence of the intake pipe's internal shape on the intake volume, and generates turbulence in the later stages of compression to accelerate the combustion speed.
It improves the mixing and diffusion of fuel and air, enhances combustion speed, improves the performance and lean-burn capability of internal combustion engines, and reduces knocking and cycle fluctuations.
Smart Images
Figure CN224532826U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of internal combustion engine technology, and in particular to an internal combustion engine combustion system and an internal combustion engine. Background Technology
[0002] With the development of new energy technologies, higher requirements have been placed on the fuel consumption, emissions, and reliability of traditional internal combustion engines. At the same time, it is necessary to continuously improve the combustion chamber profile, increase the space utilization rate in the combustion chamber, and improve the uniformity of the distribution of combustible mixture.
[0003] In existing combustion system designs, the intake port of the intake pipe is usually perpendicular to the cylinder axis. The intake pipe is mainly used to organize the intake air flow pattern and form a vortex (flowing around the cylinder axis) in the combustion chamber to promote in-cylinder combustion. In order to organize an intake vortex of a certain intensity, the internal shape of the intake pipe will hinder the increase of intake volume, which is not conducive to the diffusion and distribution of the fuel-air mixture in the combustion chamber, thus hindering the improvement of internal combustion engine performance. Utility Model Content
[0004] The first objective of this invention is to provide an internal combustion engine combustion system that avoids the internal shape of the intake pipe affecting the increase of intake volume, enhances the gas mixing effect, improves the diffusion distribution of the fuel-air mixture, accelerates the combustion speed, and improves the performance of the internal combustion engine.
[0005] The second objective of this utility model is to provide an internal combustion engine including the above-mentioned internal combustion engine combustion system.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] In a first aspect of this application, an internal combustion engine combustion system is provided, comprising:
[0008] A combustion chamber, which is formed by a cylinder, a cylinder head, and a piston;
[0009] An intake pipe is provided in the cylinder head and communicates with the combustion chamber. The intake pipe and the combustion chamber cooperate to form a tumble motion of the airflow entering the combustion chamber through the intake pipe.
[0010] An exhaust pipe is provided in the cylinder head and communicates with the combustion chamber, the exhaust pipe being used to discharge airflow from the combustion chamber;
[0011] The combustion chamber is provided with two fuel injectors. The side of the combustion chamber that is connected to the intake pipe is the intake side of the combustion chamber, and the side of the combustion chamber that is connected to the exhaust pipe is the exhaust side of the combustion chamber. The plane extending from the intake side to the exhaust side of the combustion chamber and passing through the axis of the piston is the central plane of the combustion chamber. Two fuel injectors are provided on the cylinder head, and the injection ends of the two fuel injectors extend into the combustion chamber on both sides of the central plane. The injection direction of the injection orifice of the fuel injector intersects the central plane.
[0012] In one possible implementation, the bottom surface of the cylinder head is provided with a canopy structure for forming the combustion chamber. The canopy structure includes an intake-side canopy surface, an exhaust-side canopy surface, and a canopy ridge. The intake-side canopy surface and the exhaust-side canopy surface are respectively connected to both sides of the canopy ridge. The intake-side canopy surface and the exhaust-side canopy surface are inclined towards the cylinder from the side connected to the canopy ridge. The intake pipe communicates with the combustion chamber through the intake-side canopy surface, and the exhaust pipe communicates with the combustion chamber through the exhaust-side canopy. The injection end of the fuel injector extends into the combustion chamber from the position of the canopy ridge.
[0013] In one possible implementation, the injection ends of the two fuel injectors extend into the combustion chamber from both ends of the roof ridge, and the injection ends of the two fuel injectors are arranged opposite each other.
[0014] In one possible implementation, the two fuel injectors are coaxially arranged, and the injection ends of the fuel injectors are evenly distributed with a plurality of nozzles at circumferential intervals, with each nozzle of the two fuel injectors being staggered in the circumferential direction.
[0015] In one possible implementation, the included angle between the axes of two adjacent nozzles of the fuel injector is greater than or equal to the spray cone angle of the nozzle.
[0016] In one possible implementation, the top surface of the piston is provided with a combustion chamber recess that is recessed in the direction away from the cylinder head.
[0017] In one possible implementation, the surface of the combustion chamber recess is a smooth curved surface.
[0018] In one possible implementation, the intake pipe includes an intake manifold and two intake branch pipes. The first ends of the two intake branch pipes are respectively connected to the combustion chamber, and the second ends of the two intake branch pipes are respectively connected to the intake manifold. The intake ports formed by the two intake branch pipes and the combustion chamber are symmetrical about the central plane.
[0019] In one possible implementation, the exhaust pipe includes an exhaust manifold and two exhaust branch pipes, the first ends of the two exhaust branch pipes are respectively connected to the combustion chamber, the second ends of the two exhaust branch pipes are respectively connected to the exhaust manifold, and the exhaust ports formed by the two exhaust branch pipes and the combustion chamber are symmetrical about the central plane.
[0020] As can be seen from the above technical solution, this utility model discloses an internal combustion engine combustion system, which includes a combustion chamber, an intake pipe, an exhaust pipe, and fuel injectors. The combustion chamber is formed by a cylinder, a cylinder head, and a piston. The intake pipe is located on the cylinder head and communicates with the combustion chamber. The intake pipe and the combustion chamber work together to form a tumble motion of the airflow entering the combustion chamber through the intake pipe. The exhaust pipe is located on the cylinder head and communicates with the combustion chamber. The exhaust pipe is used to discharge the airflow in the combustion chamber. The side of the combustion chamber that communicates with the intake pipe is the intake side of the combustion chamber, and the side of the combustion chamber that communicates with the exhaust pipe is the exhaust side of the combustion chamber. The plane extending from the intake side to the exhaust side of the combustion chamber and passing through the axis of the piston is the central plane of the combustion chamber. Two fuel injectors are located on the cylinder head, and the injection ends of the two fuel injectors extend into the combustion chamber on both sides of the central plane. The injection direction of the injection holes of the fuel injectors intersects with the central plane.
[0021] The aforementioned internal combustion engine combustion system organizes the intake airflow into a tumble flow pattern through the coordination of the combustion chamber and intake manifold (the airflow in the combustion chamber mainly flows around an axis intersecting the cylinder axis). The tumble combustion system does not require special design of the internal shape of the intake manifold, does not affect the intake volume, and the tumble motion is enhanced in the early and middle stages of the gas compression process in the combustion chamber. In the later stages of compression, due to violent deformation, it will break up instantaneously, forming a strong turbulent flow. The turbulent motion can greatly accelerate the flame propagation speed, suppress knocking, reduce cycle fluctuations, improve lean-burn capability, and improve the performance of the internal combustion engine. At the same time, the two fuel injectors are distributed on both sides of the central plane and the injection direction intersects the central plane. This fuel injection direction can be coordinated with the tumble motion, which facilitates the tumble flow to wrap around the fuel, improves the fuel-air mixing effect and diffusion effect, increases the excess air coefficient in the cylinder, accelerates the combustion speed, and thus improves the performance of the internal combustion engine.
[0022] In a second aspect of this application, an internal combustion engine is provided, including the internal combustion engine combustion system of the first aspect and its possible implementations. Since this internal combustion engine employs the internal combustion engine combustion system of the first aspect and its possible implementations, it should therefore possess the same beneficial effects as the internal combustion engine combustion system, which will not be elaborated further here. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 A front view of an internal combustion engine combustion system provided in an embodiment of this utility model;
[0025] Figure 2 A side view of an internal combustion engine combustion system provided in an embodiment of this utility model;
[0026] Figure 3 A top view of an internal combustion engine combustion system provided in an embodiment of this utility model;
[0027] Figure 4 This is a schematic diagram of the tumble flow inside the combustion chamber;
[0028] Figure 5 A schematic diagram of the fuel injector of an internal combustion engine combustion system provided in this embodiment of the utility model;
[0029] Figure 6 This is a schematic diagram defining the spray penetration distance and spray cone angle.
[0030] In the picture:
[0031] 100 is the combustion chamber; 200 is the cylinder; 300 is the cylinder head; 310 is the canopy structure; 311 is the intake side canopy surface; 312 is the exhaust side canopy surface; 313 is the canopy ridge; 400 is the piston; 410 is the combustion chamber recess; 500 is the intake pipe; 510 is the intake manifold; 520 is the intake branch pipe; 600 is the exhaust pipe; 610 is the exhaust manifold; 620 is the exhaust branch pipe; 700 is the fuel injector; 800 is the fuel spray. Detailed Implementation
[0032] One of the core features of this invention is to provide an internal combustion engine combustion system. The structural design of this internal combustion engine combustion system enables it to avoid the influence of the internal shape of the intake pipe on the increase of intake volume, enhance the gas mixing effect, improve the diffusion distribution of the fuel-air mixture, accelerate the combustion speed, and improve the performance of the internal combustion engine.
[0033] Another core aspect of this invention is to provide an internal combustion engine that includes the aforementioned internal combustion engine combustion system.
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0035] This application provides an internal combustion engine combustion system. Please refer to [link / reference]. Figures 1 to 3 .
[0036] The internal combustion engine combustion system is a piston internal combustion engine, including a combustion chamber 100, an intake pipe 500, an exhaust pipe 600, and a fuel injector 700.
[0037] The combustion chamber 100 provides a sealed space for fuel combustion. The movement of the piston 400 creates a space environment for the compression and expansion of the combustible mixture, thereby completing the energy conversion. The combustion chamber 100 refers to the space between the top of the piston 400 and the cylinder head 300 and the cylinder 200 after the piston 400 reaches the top dead center. That is, the combustion chamber 100 is surrounded by the cylinder 200, the cylinder head 300 and the piston 400. The cylinder 200 is set on the engine block. The piston 400 is axially reciprocating and is fitted inside the cylinder 200. The cylinder head 300 is fitted with the engine block and covers the upper opening of the cylinder 200.
[0038] The intake pipe 500 is located on the cylinder head 300 and communicates with the combustion chamber 100. The intake pipe 500 is used to supply air or a mixture of air and fuel to the combustion chamber 100. The intake pipe 500 and the combustion chamber 100 work together to form a tumble motion of the airflow entering the combustion chamber 100 through the intake pipe 500. The tumble motion refers to the organized longitudinal airflow motion formed during the intake process, which rotates around a straight line perpendicular to or intersecting the axis of the cylinder 200. This can optimize the formation of the air-fuel mixture, enhance the turbulence intensity in the cylinder, accelerate the combustion speed, and improve the combustion stability.
[0039] It should be noted that an intake valve mechanism is also provided at the position where the intake pipe 500 connects to the combustion chamber 100. The intake valve mechanism starts to open when the piston 400 approaches the top dead center (at the end of the exhaust stroke) and closes after the piston 400 reaches the bottom dead center (after the intake stroke ends). The airflow in the intake pipe 500 flows into the combustion chamber 100 through the gap between the intake pipe 500 and the intake valve mechanism.
[0040] The exhaust pipe 600 is located on the cylinder head 300 and communicates with the combustion chamber 100. The exhaust pipe 600 is used to discharge the airflow in the combustion chamber 100. An exhaust valve mechanism is also provided at the position where the exhaust pipe 600 communicates with the combustion chamber 100. The exhaust valve mechanism opens when the piston 400 approaches the bottom dead center (the power stroke is about to end) and closes after the piston 400 reaches the top dead center (the combustion system enters the intake stroke). The side of the combustion chamber 100 that communicates with the intake pipe 500 is the intake side of the combustion chamber 100, and the side of the combustion chamber 100 that communicates with the exhaust pipe 600 is the exhaust side of the combustion chamber 100. The plane extending from the intake side to the exhaust side of the combustion chamber 100 and passing through the axis of the piston 400 is the center plane of the combustion chamber 100.
[0041] Two fuel injectors 700 are disposed on the cylinder head 300 and the injection ends of the two fuel injectors 700 extend into the combustion chamber 100 on both sides of the central plane. The injection direction of the injection holes of the injection ends of the fuel injectors 700 intersects the central plane, that is, the two fuel injectors 700 inject fuel towards the central plane from both sides of the central plane.
[0042] Compared with the prior art, the internal combustion engine combustion system provided in this application organizes the intake air flow into a tumble flow pattern through the cooperation of the combustion chamber 100 and the intake pipe (the airflow in the combustion chamber 100 mainly flows around the axis intersecting with the axis of the cylinder 200). The tumble flow combustion system does not require special design of the internal shape of the intake pipe 500, does not affect the intake volume, and the tumble flow motion is strengthened in the early and middle stages of the gas compression process in the combustion chamber 100. In the later stage of compression, due to the violent deformation, it will break instantly and form a strong turbulence. The turbulence motion can greatly accelerate the flame propagation speed, suppress knocking, reduce cycle fluctuations, improve lean-burn capability, and improve the performance of the internal combustion engine. At the same time, the two fuel injectors 700 are distributed on both sides of the central plane and the injection direction intersects with the central plane. This fuel injection direction can be coordinated with the tumble flow motion, which facilitates the tumble flow to wrap around the fuel, improves the fuel-air mixing effect and diffusion effect, increases the excess air coefficient in the cylinder, accelerates the combustion speed, and thus improves the performance of the internal combustion engine.
[0043] like Figure 1 and Figure 2As shown, to facilitate the formation of tumble flow in the combustion chamber 100, a canopy structure 310 for enclosing the combustion chamber 100 is provided on the bottom surface of the cylinder head 300. Specifically, the canopy structure 310 is provided on the bottom surface of the cylinder 200 at a position corresponding to the cylinder 200. The canopy structure 310 includes an intake-side canopy surface 311, an exhaust-side canopy surface 312, and a canopy ridge 313. The intake-side canopy surface 311 and the exhaust-side canopy surface 312 are respectively connected to both sides of the canopy ridge 313. Starting from the side connected to the roof ridge 313, the structure slopes towards the cylinder 200. That is, the roof ridge 313 is the part of the roof structure 310 furthest from the cylinder 200, and is typically located in the middle or near the middle of the roof structure 310. The intake pipe 500 connects to the combustion chamber 100 via the intake-side roof surface 311, and the exhaust pipe 600 connects to the combustion chamber 100 via the exhaust-side roof surface. The injection end of the fuel injector 700 extends into the combustion chamber 100 from the position of the roof ridge 313. Figure 3 As shown.
[0044] Please see Figure 2 and Figure 3 In one specific embodiment of this application, the injection ends of two fuel injectors 700 extend into the combustion chamber 100 from both ends of the roof ridge 313, and the injection ends of the two fuel injectors 700 are arranged opposite each other. That is, the two fuel injectors 700 are respectively arranged on both sides of the fuel chamber along the roof ridge 313, and then spray towards the center plane of the fuel chamber. The longitudinal space of the combustion chamber 100 (along the axis of the cylinder 200) at the location of the roof ridge 313 is relatively large. Setting the fuel injectors 700 at this location can keep the fuel spray 800 away from the bottom surface of the cylinder head 300, the inner wall of the cylinder 200 and the top surface of the piston 400, and avoid the formation of an oil film at the above three locations, especially during the cold start stage. This can reduce the formation of carbon deposits, reduce heat transfer, and reduce the risk of oil aging.
[0045] like Figure 4 As shown, under the combined guidance of the intake airflow intake pipe 500 and the combustion chamber 100, a tumble flow is formed in the combustion chamber 100, flowing counterclockwise from the intake side to the exhaust side. The fuel injector 700 injects fuel spray 800 into the tumble flow along the axial direction of the tumble flow. When the tumble flow reaches a position close to the roof ridge 313, it comes into contact with the fuel spray 800. The airflow can fully contact and envelop the fuel, and drive the fuel to flow with the airflow. In this process, the intake air and fuel are mixed, and the fuel is rapidly diffused.
[0046] like Figure 2 and Figure 3As shown, two fuel injectors 700 are coaxially arranged. The injection end of the fuel injector 700 has multiple nozzles evenly distributed around its circumference. The nozzles of the two fuel injectors 700 are staggered around its circumference to prevent the fuel sprays 800 of the two fuel injectors 700 from colliding during the injection process to form a rich gas mixture zone, which would affect the diffusion of fuel in the combustion chamber 100 and improve the uniformity of combustion.
[0047] Furthermore, in one specific embodiment of this application, such as Figure 2 and Figure 3 As shown, the two fuel injectors 700 are coaxial and their axes intersect perpendicularly with the axis of the cylinder 200. Of course, in other embodiments, the axes of the two fuel injectors 700 may only be perpendicular to the axis of the cylinder 200 but not intersect it, that is, the positions of the two fuel injectors 700 can be moved a certain distance toward the exhaust side or the intake side.
[0048] It should be noted that the two fuel injectors 700 can also be arranged in a staggered manner. For example, the two fuel injectors 700 can be arranged in a staggered manner along the axis of cylinder 200 and / or in a staggered manner from the intake side to the exhaust side. This is not limited here.
[0049] To avoid collisions between fuel sprays 800 emitted by two fuel injectors 700, in one embodiment of this application, the included angle between the axes of two adjacent nozzles of the fuel injectors 700 is greater than or equal to the spray cone angle α of the nozzle, where the spray cone angle α is the conical diffusion angle formed by the spray flow at the nozzle outlet. Figure 6 As shown.
[0050] This allows the fuel sprays 800 from the two fuel injectors 700 to stagger in the circumferential direction, using the gap between the fuel sprays 800 ejected from two adjacent nozzles of one fuel injector 700 to accommodate the fuel spray 800 from the other fuel injector 700, thereby preventing the fuel sprays 800 from the two fuel injectors 700 from colliding and forming a rich gas mixture zone.
[0051] like Figure 6 As shown, the spray penetration distance L refers to the distance the spray front travels along the axial direction of the fuel injector 700 to a specific position. To further avoid the generation of a rich fuel mixture zone, in one embodiment of this application, as... Figure 5 As shown, the length of the overlapping portion of the fuel spray 800 of the two fuel injectors 700 in the axial direction of the two fuel injectors 700 is no greater than half of the spray penetration distance L.
[0052] In order to organize the intake airflow into a strong tumble flow pattern in the combustion chamber 100, in one embodiment of this application, the top surface of the piston 400 is provided with a combustion chamber recess 410 that is recessed in the direction away from the cylinder head 300. The combustion chamber recess 410 can provide clearance space for the tumble flow of the airflow in the combustion chamber 100 and reduce the obstruction to the tumble flow.
[0053] It can be seen that this application, through the combination of the canopy structure 310 at the bottom of the cylinder head 300 and the combustion chamber recess 410 at the top of the piston 400, combined with the intake pipe 500, can effectively guide the formation of strong tumble flow in the combustion chamber 100.
[0054] like Figure 1 and Figure 2 As shown, in one embodiment of this application, the surface of the combustion chamber recess 410 is a smooth curved surface. The smooth curved surface can be an arc surface, a spherical surface, an ellipsoidal surface, or it can be formed by a smooth connection between multiple arc surfaces with different curvatures and a spherical or ellipsoidal surface. Alternatively, it can be formed by a smooth connection between at least one of the arc surface, the spherical surface, and the ellipsoidal surface and a plane. The smooth curved surface can further reduce the resistance to airflow, allowing the airflow to form a better tumble flow in the combustion chamber 100.
[0055] It should be noted that a smooth surface can be a regular symmetrical surface, or it can be an irregular and / or asymmetrical surface; no limitation is made here.
[0056] The top surface of piston 400 can be a plane, a conical surface, or an irregular structure. When the top surface of piston 400 is a plane, this plane can be perpendicular to the axis of piston 400 (e.g., Figure 1 and Figure 2 (As shown), it can also intersect the axis of piston 400 at an angle. When the top surface of piston 400 is a conical surface, it can be a structure in which the diameter gradually expands or contracts from the end away from cylinder head 300. That is, the top surface of piston 400 can be designed as needed and is not limited to... Figure 1 and Figure 2 The planar structure shown.
[0057] Please see Figures 1 to 3 In one embodiment of this application, the intake pipe 500 includes an intake manifold 510 and two intake branch pipes 520. The first ends of the two intake branch pipes 520 are respectively connected to the combustion chamber 100, and the second ends of the two intake branch pipes 520 are respectively connected to the intake manifold 510. The intake ports formed by the two intake branch pipes 520 and the combustion chamber 100 are symmetrical about the central plane (e.g., ...). Figure 3 (As shown).
[0058] like Figure 3As shown, the plane passing through the axis of cylinder 200 and perpendicular to the center plane is the vertical plane. The intake manifold 510 and the two intake straight pipes are set at an angle that is not perpendicular to the vertical plane at the ends away from the cylinder head 300, so that the airflow can be guided to form a slanted tumble flow in the combustion chamber 100.
[0059] like Figure 3 As shown, the exhaust pipe 600 includes an exhaust manifold 610 and two exhaust branch pipes 620. The first ends of the two exhaust branch pipes 620 are respectively connected to the combustion chamber 100, and the second ends of the two exhaust branch pipes 620 are respectively connected to the exhaust manifold 610. The exhaust ports formed by the two exhaust branch pipes 620 and the combustion chamber 100 are symmetrical about the central plane.
[0060] This application also provides an internal combustion engine, which includes the internal combustion engine combustion system in the above embodiments. The internal combustion engine includes, but is not limited to, diesel engines, gasoline engines, and gas engines. Since the internal combustion engine adopts the internal combustion engine combustion system in the above embodiments, the technical effects of the internal combustion engine can be referred to the above embodiments.
[0061] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.
[0062] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0063] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0064] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. An internal combustion engine combustion system, characterized in that, include: A combustion chamber (100) is formed by a cylinder (200), a cylinder head (300), and a piston (400); An intake pipe (500) is provided on the cylinder head (300) and communicates with the combustion chamber (100). The intake pipe (500) and the combustion chamber (100) cooperate to form a tumble motion of the airflow entering the combustion chamber (100) through the intake pipe (500). An exhaust pipe (600) is disposed on the cylinder head (300) and communicates with the combustion chamber (100), the exhaust pipe (600) being used to discharge the airflow in the combustion chamber (100); The combustion chamber (100) is connected to the intake pipe (500) on one side, which is the intake side of the combustion chamber (100). The combustion chamber (100) is connected to the exhaust pipe (600) on one side, which is the exhaust side of the combustion chamber (100). The plane extending from the intake side to the exhaust side of the combustion chamber (100) and passing through the axis of the piston (400) is the central plane of the combustion chamber (100). Two fuel injectors (700) are disposed on the cylinder head (300), and the injection ends of the two fuel injectors (700) extend into the combustion chamber (100) on both sides of the central plane. The injection direction of the injection orifice of the injection end of the fuel injector (700) intersects with the central plane.
2. The internal combustion engine combustion system according to claim 1, characterized in that, The bottom surface of the cylinder head (300) is provided with a canopy structure (310) for forming the combustion chamber (100). The canopy structure (310) includes an intake-side canopy surface (311), an exhaust-side canopy surface (312), and a canopy ridge (313). The intake-side canopy surface (311) and the exhaust-side canopy surface (312) are respectively connected to both sides of the canopy ridge (313). The intake-side canopy surface (311) and the exhaust-side canopy surface (312) are connected to both sides of the canopy ridge (313). 312) Starting from the side connected to the roof ridge (313), the components are inclined toward the cylinder (200). The intake pipe (500) is connected to the combustion chamber (100) through the intake side roof surface (311). The exhaust pipe (600) is connected to the combustion chamber (100) through the exhaust side roof. The injection end of the fuel injector (700) extends into the combustion chamber (100) from the position of the roof ridge (313).
3. The internal combustion engine combustion system according to claim 2, characterized in that, The injection ends of the two fuel injectors (700) extend into the combustion chamber (100) from both ends of the roof ridge (313), and the injection ends of the two fuel injectors (700) are arranged opposite each other.
4. The internal combustion engine combustion system according to claim 3, characterized in that, The two fuel injectors (700) are coaxially arranged, and the injection end of the fuel injector (700) is evenly distributed with a plurality of nozzles at intervals along the circumference. The nozzles of the two fuel injectors (700) are staggered in the circumference.
5. The internal combustion engine combustion system according to claim 4, characterized in that, The included angle between the axes of two adjacent nozzles of the fuel injector (700) is greater than or equal to the spray cone angle of the nozzle.
6. The internal combustion engine combustion system according to any one of claims 1-5, characterized in that, The piston (400) has a combustion chamber recess (410) on its top surface that is recessed away from the cylinder head (300).
7. The internal combustion engine combustion system according to claim 6, characterized in that, The surface of the combustion chamber recess (410) is a smooth curved surface.
8. The internal combustion engine combustion system according to any one of claims 1-5, characterized in that, The intake pipe (500) includes an intake manifold (510) and two intake branch pipes (520). The first ends of the two intake branch pipes (520) are respectively connected to the combustion chamber (100), and the second ends of the two intake branch pipes (520) are respectively connected to the intake manifold (510). The intake ports formed by the two intake branch pipes (520) and the combustion chamber (100) are symmetrical about the central plane.
9. The internal combustion engine combustion system according to any one of claims 1-5, characterized in that, The exhaust pipe (600) includes an exhaust manifold (610) and two exhaust branch pipes (620). The first ends of the two exhaust branch pipes (620) are respectively connected to the combustion chamber (100), and the second ends of the two exhaust branch pipes (620) are respectively connected to the exhaust manifold (610). The exhaust ports formed by the two exhaust branch pipes (620) and the combustion chamber (100) are symmetrical about the central plane.
10. An internal combustion engine, characterized in that, Including the internal combustion engine combustion system as described in any one of claims 1-9.