Cylinder cover structure with double ignition systems

Abstract

The invention discloses a cylinder cover structure with double ignition systems. The air cylinder cover structure with the double ignition systems comprises an air cylinder cover body, a first ignition device and a second ignition device, a cylinder head includes a cylinder head body having a first spark plug mounting hole, a first ignition system including a first spark plug mounted within the first spark plug mounting hole, and a second ignition system including a second spark plug mounted within a second spark plug mounting hole of the cylinder head body. According to the cylinder cover structure with the double ignition systems, the combustion speed of mixed gas of an engine is high, the combustion time is shortened, the combustion efficiency is improved, the engine can reach a higher compression ratio, and emission of pollutants is correspondingly reduced; and meanwhile, the stability of flames is improved, fire cut-off possibly caused by one sparking plug is avoided, and the engine can work stably.

Description

Technical Field

[0001] The invention relates to the field of engine ignition systems, in particular to a cylinder head structure with a dual ignition system. Background Art

[0002] The main function of the engine ignition system is to generate electric sparks through the spark plug at the end of the compression stroke of the gas engine to ignite the combustible mixture compressed in the cylinder, so that the engine can work normally and output power. The performance of the ignition system directly affects the power, fuel consumption and emission level of the engine. The ignition system is usually composed of a battery, a generator, an ignition coil, a distributor (or an electronic control unit) and a spark plug. These components work together to ensure that sufficient high voltage electricity is provided to the spark plug at the right time to achieve reliable ignition.

[0003] Most engines currently use a single ignition system. Single ignition combustion is limited by homogeneous combustion, which makes the engine mixture burn slowly, burn for a long time, have low combustion efficiency, emit high pollutants, and cannot achieve a high compression ratio. In addition, a spark plug may cause misfire and poor flame stability, making the engine unable to work.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a cylinder head structure with a simple and reasonable structure and a dual ignition system, which can make the engine mixture burn quickly and efficiently, so that the engine can achieve a higher compression ratio and correspondingly reduce pollutant emissions; at the same time, it improves the stability of the flame.

[0006] To achieve the above-mentioned objectives, the present invention provides a cylinder head structure with a dual ignition system, comprising: a cylinder head body, which is provided with a first spark plug mounting hole and a second spark plug mounting hole; a first ignition system, which comprises: a first spark plug, which is installed in the first spark plug mounting hole, and a second ignition system, which comprises: a second spark plug, which is installed in the second spark plug mounting hole of the cylinder head body.

[0007] In a preferred embodiment, the first spark plug is installed in a first spark plug mounting hole on the top of the cylinder head body; and the second spark plug is installed in a second spark plug mounting hole on the side of the cylinder head body.

[0008] In a preferred embodiment, the first spark plug and the second spark plug are arranged at an acute angle.

[0009] In a preferred embodiment, a pre-combustion chamber is provided at the front end of the second spark plug mounting hole, and the pre-combustion chamber is connected to the cylinder hole through an injection channel.

[0010] In a preferred embodiment, the number of the injection channels is one or more.

[0011] In a preferred embodiment, there are three injection channels.

[0012] Compared with the prior art, the cylinder head structure with a dual ignition system according to the present invention has the following beneficial effects: the cylinder head structure with a dual ignition system partially breaks the limitation of homogeneous combustion by setting the first ignition system and the second ignition system for igniting the mixed gas at different positions of the cylinder bore, so that the engine mixed gas burns quickly, shortens the combustion time, improves the combustion efficiency, enables the engine to achieve a higher compression ratio, and correspondingly reduces the emission of pollutants; at the same time, the stability of the flame is improved, the misfire that may be caused by a spark plug is avoided, and the engine maintains stable operation. Moreover, a pre-combustion chamber is provided at the front end of the second spark plug of the second ignition system; one end of the injection channel is connected to the pre-combustion chamber, and the other end is connected to the cylinder bore. After the second spark plug ignites the mixed gas in the pre-combustion chamber, it enters the combustion chamber through multiple injection channels. The high-temperature and high-pressure mixed gas after the ignition of the pre-combustion chamber can be injected into a larger range, which is faster and more efficient than single-point ignition combustion, and can improve the combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic cross-sectional structural diagram of a cylinder head structure with a dual ignition system according to an embodiment of the present invention.

[0015] Figure 2 It is a bottom view structural schematic diagram of a cylinder head structure with a dual ignition system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0017] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] like Figure 1 and Figure 2 As shown, the specific structure of the cylinder head structure with a dual ignition system according to a preferred embodiment of the present invention includes: a cylinder head body, and a first ignition system and a second ignition system arranged on the cylinder head body. The first ignition system and the second ignition system ignite the mixed gas at different positions of the cylinder hole, which partially breaks the limitation of homogeneous combustion, makes the engine mixed gas burn quickly, shortens the combustion time, improves the combustion efficiency, enables the engine to achieve a higher compression ratio, and correspondingly reduces the emission of pollutants; at the same time, it improves the stability of the flame, avoids the misfire caused by a spark plug, and keeps the engine working stably.

[0025] Specifically, if Figure 1 and Figure 2 As shown, the cylinder head body 6 is arranged on the cylinder body, used to seal the cylinder, form a combustion space together with the piston, and bear the effect of high temperature and high pressure gas. The cylinder head bears the mechanical load caused by the gas force and the tightening cylinder bolts, and also bears a high thermal load due to contact with the high temperature gas. In order to ensure a good seal of the cylinder, the cylinder head can neither be damaged nor deformed. For this reason, the cylinder head should have sufficient strength and rigidity, and is a box-shaped part with a complex structure. It is machined with intake and exhaust valve seat holes, valve guide holes, and spark plug mounting holes. A water jacket, intake and exhaust channels, and a combustion chamber or a part of the combustion chamber are also cast in the cylinder head. If the camshaft is installed on the cylinder head, the cylinder head is also machined with a cam bearing hole or a cam bearing seat and its lubricating oil channel.

[0026] The spark plug mounting hole is used to mount the spark plugs of the first ignition system and the second ignition system, which are used to generate electric sparks through the spark plugs at the end of the compression stroke of the gas engine to ignite the combustible mixture compressed in the cylinder, so that the engine can work normally and output power. The first ignition system and the second ignition system work together to ensure reliable ignition at the right time.

[0027] like Figure 1 and Figure 2As shown, the first ignition system includes: a first spark plug 1, which is installed in the first spark plug installation hole of the cylinder head body 6, and its function is to discharge the pulse high voltage electricity sent by the high-voltage wire (fire nozzle wire), break through the air between the two electrodes of the spark plug, and generate electric sparks to ignite the mixed gas in the cylinder hole 2. That is, under the action of high voltage, the air between the central electrode and the side electrode of the spark plug will be rapidly ionized to form positively charged ions and negatively charged free electrons. When the voltage between the electrodes reaches a certain value, the number of ions and electrons in the gas increases like an avalanche, so that the air loses its insulation, and the gap forms a discharge channel, and a "breakdown" phenomenon occurs. At this time, the gas forms a luminous body, that is, a "spark". As it expands due to heat, a "crackling" sound also occurs. The temperature of this electric spark can be as high as 2000-3000℃, which is enough to ignite the mixed gas in the cylinder combustion chamber.

[0028] The second ignition system includes: a second spark plug 3, a pre-combustion chamber 4 and an injection channel 5, wherein the second spark plug 3 is installed in the second spark plug installation hole of the cylinder head body; the pre-combustion chamber 4 is opened at the front end of the second spark plug 3; one end of the injection channel 5 is connected to the pre-combustion chamber 4, and the other end is connected to the cylinder hole 2. After the second spark plug 3 ignites the mixed gas in the pre-combustion chamber 4, it enters the combustion chamber through multiple injection channels 5. The high-temperature and high-pressure mixed gas after ignition in the pre-combustion chamber can be injected to a larger range, which is faster and more efficient than single-point ignition combustion, and can improve the combustion efficiency. In addition, the first ignition system and the second ignition system ignite the mixed gas at different positions of the cylinder hole, which partially breaks the limitation of homogeneous combustion, makes the engine mixed gas burn faster, shortens the combustion time, further improves the combustion efficiency, enables the engine to achieve a higher compression ratio, and correspondingly reduces the emission of pollutants; at the same time, it improves the stability of the flame, avoids the possible misfire caused by a spark plug, and keeps the engine working stably.

[0029] In one embodiment, the first spark plug 1 is installed in the first spark plug mounting hole on the top of the cylinder head body 6; the second spark plug 3 is installed in the second spark plug mounting hole on the side of the cylinder head body. The first spark plug 1 and the second spark plug 3 are designed in a reasonable position and form a certain angle, which is conducive to igniting different positions of the gas, so that the gas burns more quickly, thereby improving combustion efficiency. The pre-combustion chamber is filled with fresh mixed gas during the compression process, and a high-pressure flame is formed during ignition, so that the mixed gas can be quickly ignited, effectively reducing the ignition delay period and improving the combustion stability of the gas.

[0030] In one embodiment, if Figure 1 As shown, first spark plug 1 and second spark plug 3 are arranged at an acute angle.

[0031] In one embodiment, there are one or more injection channels 5. When there are multiple injection channels 5, the pre-combustion chamber is filled with fresh mixed gas during the compression process, and multiple flames (the number depends on the design) are formed during ignition. This can quickly ignite the mixed gas, effectively reduce the ignition delay period, and improve the combustion stability of the gas.

[0032] In one embodiment, there are three injection channels 5 .

[0033] The first ignition system and the second ignition system of the cylinder head structure with a dual ignition system ignite the mixed gas at different positions of the cylinder bore, which partially breaks the limitation of homogeneous combustion, makes the engine mixed gas burn faster, shortens the combustion time, improves the combustion efficiency, enables the engine to achieve a higher compression ratio, and correspondingly reduces the emission of pollutants; at the same time, it improves the stability of the flame, avoids the misfire caused by a spark plug, and keeps the engine working stably. In addition, a pre-combustion chamber 4 is provided at the front end of the second spark plug 3 of the second ignition system; one end of the injection channel 5 is connected to the pre-combustion chamber 4, and the other end is connected to the cylinder bore 2. After the second spark plug 3 ignites the mixed gas in the pre-combustion chamber 4, it enters the combustion chamber through multiple injection channels 5. The high-temperature and high-pressure mixed gas after the ignition of the pre-combustion chamber can be injected into a larger range, which is faster and more efficient than single-point ignition combustion, and can improve the combustion efficiency.

[0034] In summary, the cylinder head structure with a dual ignition system partially breaks the limitation of homogeneous combustion by arranging the first ignition system and the second ignition system to ignite the mixture at different positions of the cylinder hole, so that the engine mixture burns quickly, shortens the combustion time, improves the combustion efficiency, enables the engine to achieve a higher compression ratio, and correspondingly reduces pollutant emissions; at the same time, it improves the stability of the flame, avoids the misfire caused by a spark plug, and keeps the engine working stably.

[0035] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0036] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A cylinder head structure with a dual ignition system, characterized in that: include: The cylinder head body is provided with a first spark plug mounting hole and a second spark plug mounting hole; A first ignition system, comprising: a first spark plug, which is installed in the first spark plug installation hole, and The second ignition system includes: a second spark plug installed in a second spark plug installation hole of the cylinder head body.

2. The cylinder head structure with a dual ignition system as claimed in claim 1, characterized in that: The first spark plug is installed in a first spark plug installation hole on the top of the cylinder head body; the second spark plug is installed in a second spark plug installation hole on the side of the cylinder head body.

3. The cylinder head structure with a dual ignition system as claimed in claim 2, characterized in that: The first spark plug and the second spark plug are arranged at an acute angle.

4. The cylinder head structure with a dual ignition system as claimed in claim 1, characterized in that: A pre-combustion chamber is provided at the front end of the second spark plug mounting hole, and the pre-combustion chamber is communicated with the cylinder hole through an injection channel.

5. The cylinder head structure with a dual ignition system as claimed in claim 4, characterized in that: The number of the injection channels is one or more.

6. The cylinder head structure with a dual ignition system as claimed in claim 5, characterized in that: There are three injection channels.

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