Pre-combustion chamber for achieving dual-stage thermal turbulent jet

Abstract

This invention provides a pre-combustion chamber for achieving dual-stage thermal turbulent jets, comprising two cavities: an outer pre-combustion chamber and an inner pre-combustion chamber. The inner pre-combustion chamber is cylindrical, while the outer pre-combustion chamber is annular, enclosing the inner pre-combustion chamber. Each cavity has its own independent spark plug and intake one-way valve. Both cavities have multiple jet orifices communicating with the main combustion chamber. The timing of the thermal turbulent jets in the inner and outer pre-combustion chambers can be controlled by adjusting the spark plug discharge timing of each cavity, thus forming a dual-stage thermal turbulent jet to regulate the combustion performance of the main combustion chamber. The advantages of this invention are its simple and compact structure, creating two independent and controllable cavities within a limited pre-combustion chamber space, and forming multiple stages of thermal turbulent jets by controlling the ignition timing of each cavity.

Description

Technical Field

[0001] This invention relates to the technical field of internal combustion engines, and more specifically, to a pre-combustion chamber that realizes a two-stage thermal turbulent jet. Background Technology

[0002] For future low-carbon / zero-carbon fuel engines such as natural gas and ammonia, thermal turbulent jet ignition has significant application potential in optimizing combustion and reducing emissions due to its advantages such as multi-point ignition and localized jet entrainment. Currently, thermal turbulent jet ignition is achieved through active or passive pre-combustion chambers. A spark plug in the pre-combustion chamber ignites the air-fuel mixture, which is then ignited by a thermal jet formed through the pre-combustion chamber nozzle. However, compared to the diesel ignition mode in dual-fuel (ammonia-diesel) or dual-fuel (ammonia-hydrogen) engines, pre-combustion chamber ignition lacks the multi-stage injection capabilities of diesel engines to further optimize in-cylinder combustion. This is because both passive and active pre-combustion chambers have only one chamber, and once ignition occurs, further flexible control is difficult. Therefore, with the current pre-combustion chamber structure, thermal turbulent jet ignition lacks the flexible combustion control capabilities of multi-stage injection found in diesel ignition.

[0003] Therefore, a new technical solution is needed to improve the above-mentioned technical problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a pre-combustion chamber that realizes a two-stage thermal turbulent jet.

[0005] According to the present invention, a pre-combustion chamber for realizing a two-stage thermal turbulence jet includes: an inner cavity of the pre-combustion chamber, an outer cavity of the pre-combustion chamber, a spark plug for the outer cavity of the pre-combustion chamber, an air inlet check valve for the outer cavity of the pre-combustion chamber, a spark plug for the inner cavity of the pre-combustion chamber, an air inlet check valve for the inner cavity of the pre-combustion chamber, a jet orifice for the outer cavity of the pre-combustion chamber, and a jet orifice for the inner cavity of the pre-combustion chamber.

[0006] The pre-combustion chamber outside the pre-combustion chamber encloses the pre-combustion chamber inside the pre-combustion chamber; the pre-combustion chamber inside the pre-combustion chamber and the pre-combustion chamber outside the pre-combustion chamber have independent spark plugs for the pre-combustion chamber inside the pre-combustion chamber and spark plugs for the pre-combustion chamber outside the pre-combustion chamber; the pre-combustion chamber inside the pre-combustion chamber and the pre-combustion chamber outside the pre-combustion chamber each have multiple jet holes that communicate with the main combustion chamber.

[0007] Preferably, the pre-combustion chamber has a cylindrical structure.

[0008] Preferably, the pre-combustion chamber has an annular structure.

[0009] Preferably, the pre-combustion chamber and the pre-combustion outer chamber have independent pre-combustion chamber spark plugs and pre-combustion outer chamber spark plugs, and the discharge timing of the pre-combustion chamber spark plugs and pre-combustion outer chamber spark plugs are independently controlled to regulate the formation time of the thermal turbulence jet in the pre-combustion chamber and the pre-combustion outer chamber.

[0010] Preferably, the pre-combustion chamber and the pre-combustion outer chamber have independent pre-combustion chamber inlet check valves and pre-combustion outer chamber inlet check valves, respectively, and fuel is supplied to the pre-combustion chamber and the pre-combustion outer chamber through the pre-combustion chamber gas supply pipeline via the pre-combustion chamber inlet check valves and the pre-combustion outer chamber inlet check valves.

[0011] Preferably, the gas inlet check valves of the pre-combustion chamber and the pre-combustion chamber are connected by the same gas pipeline. By setting the gas inlet check valves of the pre-combustion chamber and the pre-combustion chamber respectively, the direction of the flame after ignition is controlled, and the fuel intake of the pre-combustion chamber and the pre-combustion chamber is uniformly controlled.

[0012] Preferably, the pre-combustion chamber and the pre-combustion outer chamber have multiple independent jet holes that communicate with the main combustion chamber.

[0013] Preferably, a passive pre-combustion chamber is formed by removing the one-way valve for the air inlet of the pre-combustion chamber and the one-way valve for the air inlet of the pre-combustion chamber, but it is not limited to the active pre-combustion chamber described in this invention.

[0014] Preferably, the pre-combustion chamber and the pre-combustion outer chamber can be multiple, forming a multi-segment thermal turbulence jet.

[0015] Preferably, the pre-combustion chamber is used in conjunction with both premixed air intake and high-pressure direct injection modes of the main combustion chamber.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention achieves dual-stage thermal turbulence jet by setting up two independent chambers, an inner chamber and an outer chamber, in the pre-combustion chamber and realizing independent ignition control for each chamber, thereby effectively regulating in-cylinder combustion in the engine. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a structural diagram of a pre-combustion chamber structure for an internal combustion engine according to the present invention;

[0020] Figure 2 This is a top view of a pre-combustion chamber structure for an internal combustion engine according to the present invention;

[0021] Figure 3 This is a cross-sectional view (A) of a pre-combustion chamber structure for an internal combustion engine according to the present invention.

[0022] Figure 4 This is a cross-sectional view (B) of a pre-combustion chamber structure for an internal combustion engine according to the present invention.

[0023] Figure 5 This is a C-sectional view of a pre-combustion chamber structure for an internal combustion engine according to the present invention.

[0024] in:

[0025] Pre-combustion chamber 1; Pre-combustion chamber spark plug 5

[0026] Pre-combustion outdoor cavity 2; Pre-combustion indoor cavity air inlet one-way valve 6

[0027] 3. Pre-ignition outer cavity spark plug; 7. Pre-ignition outer cavity jet orifice.

[0028] 4. Pre-combustion chamber outdoor air inlet check valve; 8. Pre-combustion chamber indoor jet orifice. Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0030] Example 1:

[0031] According to the present invention, a pre-combustion chamber for realizing dual-stage thermal turbulence jets includes: an inner pre-combustion chamber, an outer pre-combustion chamber, an outer pre-combustion chamber spark plug, an outer pre-combustion chamber inlet check valve, an inner pre-combustion chamber spark plug, an inner pre-combustion chamber inlet check valve, an outer pre-combustion chamber jet orifice, and an inner pre-combustion chamber jet orifice; the outer pre-combustion chamber encloses the inner pre-combustion chamber; the inner and outer pre-combustion chambers each have independent inner and outer pre-combustion chamber spark plugs; the inner and outer pre-combustion chambers each have independent inner and outer pre-combustion chamber gas inlet check valves; and the inner and outer pre-combustion chambers each have multiple jet orifices communicating with the main combustion chamber.

[0032] The pre-combustion chamber has a cylindrical structure; the pre-combustion outer chamber has a ring-shaped structure. Each pre-combustion chamber has its own independent spark plug, which independently controls the discharge timing to regulate the formation time of the thermal turbulence jet. Each pre-combustion chamber also has its own independent one-way inlet valve. Fuel is supplied to the pre-combustion chamber and the outer chamber respectively via the pre-combustion chamber gas supply pipeline through these valves. The pre-combustion chamber gas inlet valves are also independent. The pre-combustion chamber gas inlet check valve and the pre-combustion chamber outer gas inlet check valve are connected by the same gas pipeline. By setting separate pre-combustion chamber gas inlet check valves for the pre-combustion chamber and the pre-combustion chamber outer gas inlet check valve, the direction of the flame after ignition is controlled, and the fuel intake of the pre-combustion chamber and the pre-combustion chamber is uniformly controlled. The pre-combustion chamber and the pre-combustion chamber outer gas inlet check valve have multiple independent jet holes connected to the main combustion chamber. By removing the pre-combustion chamber inner gas inlet check valve and the pre-combustion chamber outer gas inlet check valve, a passive pre-combustion chamber is formed, which is not limited to the active pre-combustion chamber described in this invention. There can be multiple pre-combustion chambers and the pre-combustion chamber outer gas inlet, forming multi-segment thermal turbulence jets. The pre-combustion chamber can be used in conjunction with the main combustion chamber premixed air intake and high-pressure direct injection modes.

[0033] Example 2:

[0034] The purpose of this invention is to provide a pre-combustion chamber structure for an internal combustion engine that enables dual-stage thermal turbulence jets to regulate in-cylinder combustion.

[0035] A pre-combustion chamber structure for an internal combustion engine includes two independent chambers: an inner pre-combustion chamber 1 and an outer pre-combustion chamber 2. The outer pre-combustion chamber 2 has an annular structure, while the inner pre-combustion chamber 1 has a cylindrical structure, with the outer pre-combustion chamber 2 enclosing the inner pre-combustion chamber 1. Both chambers have independent spark plugs, each with independently controllable discharge timing to regulate the formation time of the thermal turbulence jet in each chamber. Both chambers have independent intake check valves, supplying fuel to each chamber via a pre-combustion chamber fuel supply line through these valves. Both chambers have multiple independent jet orifices communicating with the main combustion chamber. By removing the intake check valves, a passive pre-combustion chamber can be formed, not limited to the active pre-combustion chamber described in this invention. The number of independent pre-combustion chamber cavities is not limited to two; structural optimization can further expand the number of pre-combustion chamber cavities, forming more than two segments of thermal turbulence jets.

[0036] This invention provides a pre-combustion chamber structure for an internal combustion engine, comprising two cavities: an inner pre-combustion chamber and an outer pre-combustion chamber. The outer pre-combustion chamber has an approximately annular structure that encloses the cylindrical inner pre-combustion chamber. The inner and outer pre-combustion chambers each have independent spark plugs. The inner and outer pre-combustion chambers each have independent one-way gas intake valves. The inner and outer pre-combustion chambers each have multiple jet holes that communicate with the main combustion chamber.

[0037] The spark plugs in the inner and outer pre-combustion chambers can be controlled independently, thereby regulating the timing of thermal turbulence jet formation in both chambers. The intake check valves in both chambers can be connected by the same gas pipeline. This prevents flame propagation to other chambers after ignition in different chambers by using separate check valves, and also simplifies the gas system structure by unifying fuel intake control in both chambers. Multiple jet orifices can be provided in both the inner and outer pre-combustion chambers, allowing for multi-point jet ignition in both chambers.

[0038] This invention provides a pre-combustion chamber structure for an internal combustion engine, such as... Figure 1 As shown, the pre-combustion chamber has two cavities: an inner pre-combustion chamber 1 and an outer pre-combustion chamber 2. Specifically, the outer pre-combustion chamber has an annular structure, and the inner pre-combustion chamber has a cylindrical structure, with the outer pre-combustion chamber enclosing the inner pre-combustion chamber. The inner and outer pre-combustion chambers are separated by an isolation wall starting from the top of the pre-combustion chamber. The outer cavity gradually evolves into an annular structure through a semi-cylindrical top, and the inner cavity gradually evolves into an inner cylindrical shape through a semi-cylindrical top.

[0039] The pre-combustion chamber 2 is equipped with an independent pre-combustion chamber inlet check valve 4, and the pre-combustion chamber 1 is equipped with an independent pre-combustion chamber inlet check valve 6. Gas is supplied to the pre-combustion chamber 2 and the pre-combustion chamber 1 via external gas pipelines through the pre-combustion chamber inlet check valve 4 and the pre-combustion chamber inlet check valve 6, respectively. When the pre-combustion chamber adopts a passive design, the pre-combustion chamber inlet check valve 4 and the pre-combustion chamber inlet check valve 6 can be removed.

[0040] The pre-combustion chamber 2 is equipped with an independent pre-combustion chamber spark plug 3, and the pre-combustion chamber 1 is equipped with an independent pre-combustion chamber spark plug 5. The pre-combustion chamber spark plug 3 and the pre-combustion chamber spark plug 5 are controlled by independent high-voltage coils and ignition drivers, respectively, to achieve independent ignition control of the pre-combustion chamber 1 and the pre-combustion chamber 2.

[0041] The pre-combustion outer cavity 2 is equipped with an independent pre-combustion outer cavity jet orifice 7, and the pre-combustion inner cavity 1 is equipped with an independent pre-combustion inner cavity jet control 8. The number and orientation of the jet orifices can be selected according to actual needs.

[0042] During the operation of the internal combustion engine, the pre-combustion chamber of this invention can be used in conjunction with two modes: premixed intake and high-pressure direct injection. During the initial intake and compression phases of the internal combustion engine, pre-combustion chamber fuel gas is supplied to the outer pre-combustion chamber 2 and the inner pre-combustion chamber 1 via the pre-combustion chamber fuel gas pipeline through the outer pre-combustion chamber intake check valve 4 and the inner pre-combustion chamber intake check valve 6, respectively. According to the ignition timing control of the internal combustion engine controller, spark discharge is generated near the top dead center of the compression stroke through the spark plugs 3 and 5 in the outer pre-combustion chamber, respectively, igniting the mixture in the outer pre-combustion chamber 2 and the inner pre-combustion chamber 3. By controlling the ignition timing of spark plug 3 and spark plug 5 in the inner pre-combustion chamber, thermal turbulent jets can be formed at different times in the outer pre-combustion chamber 2 and the inner pre-combustion chamber 3, thereby forming a dual-stage thermal turbulent jet that ignites the mixture in the main combustion chamber, flexibly controlling in-cylinder combustion.

[0043] In summary, the advantages of this invention are that it has a simple and compact structure, and two independent chambers are created within the limited pre-combustion chamber space, thereby realizing a dual-stage pre-combustion chamber thermal turbulence jet to regulate in-cylinder combustion.

[0044] This invention provides a pre-combustion chamber structure for an internal combustion engine, comprising two cavities: an outer pre-combustion chamber and an inner pre-combustion chamber. The inner pre-combustion chamber is cylindrical, and the outer pre-combustion chamber is annular, enclosing the inner pre-combustion chamber. Each cavity has its own independent spark plug and intake one-way valve. Both cavities have multiple jet orifices communicating with the main combustion chamber. The timing of the thermal turbulence jet in the inner and outer pre-combustion chambers can be controlled by separately controlling the spark plug discharge timing in each cavity, thus forming a dual-stage thermal turbulence jet to regulate the combustion performance of the main combustion chamber. The advantages of this invention are its simple and compact structure, creating two independent and controllable cavities within a limited pre-combustion chamber space, and forming multiple stages of thermal turbulence jets by controlling the ignition timing of each cavity.

[0045] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0046] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A pre-combustion chamber for realizing a two-stage thermal turbulent jet, characterized in that, include: Pre-combustion chamber, pre-combustion chamber, pre-combustion chamber spark plug, pre-combustion chamber intake check valve, pre-combustion chamber spark plug, pre-combustion chamber intake check valve, pre-combustion chamber jet orifice, and pre-combustion chamber jet orifice; The pre-combustion chamber outside encloses the pre-combustion chamber inside; the pre-combustion chamber inside and the pre-combustion chamber outside each have independent spark plugs for the pre-combustion chamber inside and outside; the pre-combustion chamber inside and the pre-combustion chamber outside each have independent one-way gas inlet valves for the pre-combustion chamber inside and outside; the pre-combustion chamber inside and the pre-combustion chamber outside each have multiple jet holes communicating with the main combustion chamber. The pre-combustion chamber and the pre-combustion outer chamber each have independent spark plugs for the pre-combustion chamber and the pre-combustion outer chamber. The discharge timing of the spark plugs for the pre-combustion chamber and the pre-combustion outer chamber is independently controlled to regulate the formation time of the thermal turbulence jet in the pre-combustion chamber and the pre-combustion outer chamber. The pre-combustion chamber and the pre-combustion outer chamber each have independent one-way valves for the pre-combustion chamber and the pre-combustion outer chamber. Fuel is supplied to the pre-combustion chamber and the pre-combustion outer chamber respectively through the pre-combustion chamber gas supply pipeline via the one-way valves for the pre-combustion chamber and the pre-combustion outer chamber.

2. The pre-combustion chamber for realizing a two-stage thermal turbulent jet according to claim 1, characterized in that, The pre-combustion chamber has a cylindrical structure.

3. The pre-combustion chamber for realizing a two-stage thermal turbulent jet according to claim 1, characterized in that, The pre-combustion chamber has a ring-shaped structure.

4. The pre-combustion chamber for realizing a two-stage thermal turbulent jet according to claim 1, characterized in that, The gas inlet check valves of the pre-combustion chamber and the pre-combustion chamber are connected by the same gas pipeline. By setting the gas inlet check valves of the pre-combustion chamber and the pre-combustion chamber respectively, the direction of the flame after ignition is controlled, and the fuel intake of the pre-combustion chamber and the pre-combustion chamber is uniformly controlled.

5. The pre-combustion chamber for realizing a two-stage thermal turbulent jet according to claim 1, characterized in that, The pre-combustion chamber and the pre-combustion chamber each have multiple independent jet holes that connect to the main combustion chamber.

6. The pre-combustion chamber for realizing a two-stage thermal turbulent jet according to claim 1, characterized in that, A passive pre-combustion chamber is formed by removing the one-way valve for the air inlet of the pre-combustion chamber and the one-way valve for the air inlet of the pre-combustion chamber.

7. The pre-combustion chamber for realizing a two-stage thermal turbulent jet according to claim 1, characterized in that, The pre-combustion chamber and the pre-combustion outer chamber can be multiple, forming multiple segments of thermal turbulent jets.

8. The pre-combustion chamber for realizing a two-stage thermal turbulent jet according to claim 1, characterized in that, The pre-combustion chamber is used in conjunction with the main combustion chamber in two modes: premixed air intake and high-pressure direct injection.

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