Engine system and control method
By integrating the fuel reforming process into the pre-combustion chamber of the engine, using reforming catalytic coating and resistive wire heating technology, the engine structure complexity and space occupation caused by on-board catalytic reactions are solved, and the effects of efficient combustion and low emissions are achieved.
Patent Information
- Application Number
- CN202510474344.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2025-06-10
AI Technical Summary
The method of generating hydrogen-rich gas on-board catalytic reactions to improve combustion efficiency will lead to complexity of the engine structure and increased space consumption. How to reduce the impact on the engine structure layout has become a technical problem that needs to be solved urgently.
The reforming process of fuel is integrated into the pre-combustion chamber, by applying a reforming catalytic coating on the inner wall of the pre-combustion chamber housing, heating the catalyst to a preset temperature using a resistive wire, reforming the fuel and air is carried out to generate a reforming product, and ignite it through a spark plug to combust the gas mixture with the main combustion chamber.
It effectively reduces the engine space, improves combustion efficiency, and reduces nitrogen oxide emissions, avoids the complexity of the engine structure.
Smart Images
Figure CN120120115A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of engines and engine control, and more particularly, to an engine system and a control method. Background Art
[0002] As the core power device of modern automobiles, internal combustion engines have experienced technological iterations from carburetors to direct injection into the cylinder (GDI / FSI) and from naturally aspirated to turbocharged. Currently, mainstream gasoline engines optimize the intake and exhaust efficiency through variable valve timing and lift technology (VVT-i / Dual VVT), while diesel engines rely on high-pressure common rail direct injection to achieve coordinated control of particulate matter and nitrogen oxide emissions. However, restricted by the Carnot cycle theory, the thermal efficiency of traditional engines generally hovers between 30% - 45%. Moreover, with the tightening of global carbon emission regulations (such as the Euro 7 standard requires CO 2 emissions to be less than 95 g / km), the improvement space relying solely on structural optimization has significantly narrowed.
[0003] In this context, fuel reforming technology has become a research hotspot due to its potential for optimizing the combustion process. Fuel reforming is a key technology that converts large-molecule hydrocarbons into hydrogen-rich gas (where the volume fraction of hydrogen gas can reach 40 - 60%) through catalytic reactions, providing a new path for improving combustion efficiency and reducing pollutant emissions. Steam reforming (SMR) and autothermal reforming (ATR) processes using gasoline / diesel as raw materials can generate a gas mixture with a hydrogen content of 30 - 50% in the temperature range of 500 - 800°C. Direct injection into an internal combustion engine can significantly broaden the lean combustion boundary and increase the thermal efficiency by 8 - 15%. In response to the penetration trend of biomass fuels and synthetic fuels, low-temperature plasma-assisted reforming technology exhibits advantages in low-temperature startup. Cooperating with a selective catalytic reduction (SCR) system can reduce NOx emissions by more than 90%. In the future, real-time catalyst activity monitoring and dynamic reforming ratio control algorithms based on artificial intelligence will become the research focus for breaking through the lag in dynamic operating condition response.
[0004] In related technologies, on-vehicle catalytic reactions are used to generate hydrogen-rich gas to improve combustion efficiency, but this will cause significant changes in the engine structure, especially an increase in complexity and occupied space. For example, experimental data from a certain automobile company show that the manifold-integrated reformer expands the volume of the intake manifold by about 2.3 times, forcing the turbocharger to be moved 120 mm backward and reconstructing the intake and exhaust manifold topological structure, increasing the pipeline bending loss (pressure drop up to 0.15 MPa). More severely, the 800 - 1000°C high-temperature exhaust gas generated during the reforming process needs to be thermally balanced with the engine cylinder block through a double-layer water-cooled manifold, resulting in the heat exchange area of the cylinder head-integrated EGR cooler needing to be expanded to 2.8 times that of the traditional design. Therefore, how to reduce the impact of on-vehicle reforming technology on the engine structure layout has become an urgent technical problem to be solved. Summary of the Invention
[0005] In view of the above, the present disclosure provides an engine system and a control method, which can integrate the reforming process of fuel into the pre-chamber, effectively reduce the space occupied by the engine, and improve the combustion efficiency.
[0006] To achieve the above object, as an engine system provided by the present disclosure, it includes a cylinder block and a cylinder head. The cylinder block and the cylinder head define a main combustion chamber. Wherein, it further includes: a pre-chamber housing installed on the cylinder head, with a reforming catalytic coating on its inner wall, and a through hole is provided on the pre-chamber housing; a pre-chamber top cover covering the pre-chamber housing to define a pre-chamber; a nozzle adapted to inject a first fuel into the pre-chamber, and the reforming catalytic coating is configured to catalyze a part of the first fuel and air to undergo a reforming reaction to generate reformed products in response to the reforming catalytic coating being at a preset temperature; a spark plug adapted to ignite a first mixture composed of another part of the first fuel, the reformed products and air in the pre-chamber, so that the flame passes through the through hole to ignite a second mixture composed of a second fuel and air in the main combustion chamber.
[0007] According to an embodiment of the present disclosure, the pre-chamber housing includes: an inner housing, and the reforming catalytic coating is coated on the inner wall of the inner housing; an outer housing covering the outside of the inner housing, and a resistance wire is embedded inside the outer housing, and the resistance wire is configured to heat the outer housing in response to the engine system being in a cold start condition, so that the reforming catalytic coating is heated to the preset temperature.
[0008] According to an embodiment of the present disclosure, a channel for arranging the resistance wire is provided inside the outer housing, and the channel is filled with an insulating and heat-conducting material to separate the resistance wire from the outer housing.
[0009] According to an embodiment of the present disclosure, a plurality of pits or protrusions are formed on the inner surface of the inner housing.
[0010] According to an embodiment of the present disclosure, the shape of the pit or protrusion is configured to be any one of a hexagon, a circle, an ellipse, a triangle, and a square.
[0011] According to an embodiment of the present disclosure, the reforming catalytic coating is coated on the inner wall of the pre-chamber housing by laser cladding or plasma spraying technology.
[0012] According to an embodiment of the present disclosure, an infrared spectrum sensor is further provided on the inner wall of the pre-chamber housing, which is adapted to detect the concentration of hydrogen in the reformed products.
[0013] According to an embodiment of the present disclosure, it further includes an electronic control unit configured to adjust the fuel quantity ejected by the nozzle and / or the ignition advance angle of the spark plug.
[0014] The present disclosure also provides a control method for controlling the engine system in any of the above embodiments, including: obtaining the rotational speed and throttle pedal opening information, and determining the operating condition;
[0015] Adjusting the fuel quantity ejected by the nozzle according to the above operating condition.
[0016] According to an embodiment of the present disclosure, it further includes: obtaining the concentration of the reformate in the pre-chamber; adjusting the ignition advance angle of the spark plug according to the above reformate concentration.
[0017] In the engine system provided by the present disclosure, when the reforming catalytic coating reaches the preset temperature and is activated, the first fuel and air in the pre-chamber undergo a reforming reaction to generate reformate. Under the ignition of the spark plug, the reformate, the remaining first fuel, and air are mixed and burned to ignite the mixture of the second fuel in the main combustion chamber. While improving the combustion efficiency and reducing the nitrogen oxide emissions by using the reforming of the first fuel, the complexity of the engine system structure is avoided, and the occupied space is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Through the following description of the embodiments of the present disclosure with reference to the drawings, the above and other objects, features, and advantages of the present disclosure will become clearer. In the drawings:
[0019] Figure 1 is a schematic diagram of the engine system provided by an exemplary embodiment of the present disclosure;
[0020] Figure 2 is Figure 1 a sectional view after removing the cylinder block and cylinder head in the shown exemplary embodiment;
[0021] Figure 3 is a sectional view after removing the cylinder block and cylinder head of the engine system provided by another embodiment of the present disclosure;
[0022] Figure 4 is a flowchart of the control method provided by an exemplary embodiment of the present disclosure.
[0023] In the said drawings, the meanings of the reference numerals are specifically as follows:
[0024] 1. Pre-chamber housing;
[0025] 11. Inner housing;
[0026] 12. Outer housing;
[0027] 13. Resistance wire;
[0028] 2. Reforming catalytic coating;
[0029] 3. Pre-chamber top cover;
[0030] 4. Nozzle;
[0031] 5. Spark plug;
[0032] 6. Infrared spectrum sensor;
[0033] 7. Electronic control unit;
[0034] 8. Cylinder block;
[0035] 9. Cylinder head. Detailed implementation manners
[0036] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present disclosure.
[0037] The terms used herein are merely for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.
[0038] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.
[0039] In the case of using expressions such as "at least one of A, B, and C", generally, it should be interpreted according to the meaning commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include, but is not limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C).
[0040] Figure 1 is a schematic diagram of an engine system provided by an exemplary embodiment of the present disclosure, Figure 2 is Figure 1 a sectional view of the exemplary embodiment shown after removing the cylinder block and the cylinder head, Figure 3 is a sectional view of an engine system provided by another embodiment of the present disclosure after removing the cylinder block and the cylinder head.
[0041] Exemplary embodiments of the present disclosure provide an engine system, as Figures 1-3 shown, including a cylinder block 8 and a cylinder head 9. The cylinder block 8 and the cylinder head 9 define a main combustion chamber, and a piston that can reciprocate in the axial direction is provided in the cylinder block 8. The engine system further includes a pre-combustion chamber housing 1, a reforming catalytic coating 2, a pre-combustion chamber top cover 3, a nozzle 4, and a spark plug 5. The pre-combustion chamber housing 1 is mounted on the cylinder head 9, and the inner wall is coated with the reforming catalytic coating 2. The pre-combustion chamber top cover 3 covers the pre-combustion chamber housing 1 to define a pre-combustion chamber. A through hole is provided in the pre-combustion chamber housing 1. The nozzle 4 is adapted to inject a first fuel into the pre-combustion chamber, and the reforming catalytic coating 2 is configured to catalyze a reforming reaction of a part of the first fuel and air to generate reformed products in response to the reforming catalytic coating 2 being at a preset temperature. The spark plug 5 is adapted to ignite a first mixture composed of another part of the first fuel, reformed products, and air in the pre-combustion chamber, so that the flame passes through the through hole to ignite a second mixture composed of a second fuel and air in the main combustion chamber.
[0042] In such an embodiment, the pre-combustion chamber housing 1 is mounted at the center of the top of the cylinder head 9 and extends into the main combustion chamber. The reforming catalytic coating 2 contains a reforming catalyst for catalyzing the reforming reaction of the first fuel and air. When the reforming catalytic coating 2 reaches the preset temperature, that is, the activation temperature of the reforming catalyst, the first fuel and air in the pre-combustion chamber undergo a reforming reaction to generate reformed gas. Specifically, in the pre-combustion chamber, the first fuel and air form a premixed gas. The part close to the reforming catalytic coating 2 (i.e., the edge part) will first undergo a reforming reaction, and the central part remains a premixed gas. As the reaction proceeds, the spark plug 5 ignites, causing the reformed products and the premixed gas (i.e., the first mixture) to mix and burn, and under the action of the through hole, a jet flame is formed and ejected from the pre-combustion chamber to ignite the second mixture in the main combustion chamber. In this way, not only is the combustion efficiency improved by using the reforming of the first fuel and pollutant emissions reduced, but also by integrating the reforming reaction into the pre-combustion chamber, the complexity of the engine layout and the occupied space are effectively reduced.
[0043] According to an embodiment of the present disclosure, the engine system further includes an intake passage and a main nozzle. The main nozzle is mounted in the cylinder head 9 or the intake passage for supplying a second fuel to the main combustion chamber. It should be noted that the first fuel and the second fuel can select appropriate fuel types according to actual situations. For example, when the first fuel is methanol and the second fuel is gasoline, the use cost can be effectively controlled. Of course, both the first fuel and the second fuel can also use clean fuels such as methanol. Although the cost is relatively high, higher thermal efficiency and lower emission pollution can be obtained.
[0044] In an exemplary embodiment, as Figure 2As shown, the pre-chamber housing 1 includes an inner housing 11 and an outer housing 12 covering the outside of the inner housing 11. The reforming catalytic coating 2 is coated on the inner wall of the inner housing 11. A heating wire 13 is embedded inside the outer housing 12, and the heating wire 13 is configured to heat the outer housing 12 in response to the engine system being in a cold start condition, so as to raise the temperature of the reforming catalytic coating 2 to a preset temperature.
[0045] In such an embodiment, by embedding the heating wire 13 inside the outer housing 12, the heating wire 13 generates heat after being energized, and the heat is transferred to the reforming catalytic coating 2 through the outer housing 12 and the inner housing 11, so that in the cold start condition of the engine system, the reforming catalytic coating 2 can be quickly heated to the preset temperature (i.e., the activation temperature of the reforming catalyst), thereby improving the cold start performance of the engine system.
[0046] In some alternative embodiments, after the engine system operates stably, the heating wire 13 no longer heats the reforming catalytic coating 2, or heats the reforming catalytic coating 2 with low power and intermittently, reducing the power consumption, and using the flame temperature in the pre-chamber to maintain the activation of the reforming catalyst.
[0047] According to an embodiment of the present disclosure, as Figure 3 shown, a channel for arranging the heating wire 13 is formed inside the outer housing 12, and the channel is filled with an insulating and heat-conducting material to separate the heating wire 13 from the outer housing 12.
[0048] In such an embodiment, the channel is arranged in a spiral around the outer housing 12. While the insulating and heat-conducting material transfers the heat of the heating wire 13 to the outer housing 12, it keeps the heating wire 13 and the outer housing 12 in an insulated state.
[0049] In some other embodiments, the insulating and heat-conducting material can be a ceramic material represented by silicon carbide, or a material with good flexibility and easy to process such as boron nitride, and graphite with high thermal conductivity in a specific direction (plane direction).
[0050] In an exemplary embodiment, a plurality of pits or protrusions are formed on the inner surface of the inner housing 11.
[0051] In such an embodiment, the reforming catalytic coating 2 is coated on the surface of the pits or protrusions. Compared with a smooth surface, the contact area between the reforming catalytic coating 2 and the first fuel and air is effectively increased, which is beneficial to improving the reforming reaction efficiency.
[0052] According to an embodiment of the present disclosure, the shape of the pits or protrusions is configured to be any one of a hexagon, a circle, an ellipse, a triangle, and a square.
[0053] In such an embodiment, the specific surface area of the hexagonal pits / protrusions is high, the reaction contact area is larger, and it is beneficial to maintain the strength of the inner housing 11 itself. The circular and elliptical pits / protrusions are convenient to process and have lower production costs.
[0054] Further according to an embodiment of the present disclosure, the manufacturing method of the pits or protrusions is preferably laser processing, which has high processing precision and efficiency. In some large engines, methods such as a lathe or electric discharge machining can also be used for processing.
[0055] In an exemplary embodiment, the reforming catalytic coating 2 is coated on the inner wall of the pre-combustion chamber housing 1 by laser cladding or plasma spraying technology.
[0056] In such an embodiment, in the laser cladding method, the inner wall surface of the pre-combustion chamber housing 1 is irradiated by focusing a high-energy laser beam, so that the powdered coating material (such as Ni-based, Co-based high-temperature resistant alloys or ceramic composites) and the substrate surface are melted simultaneously, and a metallurgical bonding layer is formed after rapid solidification, and the metallurgical bonding strength is high. The plasma spraying technology uses a plasma flame (temperature 8000~15000°C) to melt the spraying powder (such as Cr 2 O 3 、Al 2 O 3 -TiO 2 ceramics or metal alloys), and sprays it at high speed onto the inner wall surface of the pre-combustion chamber housing 1 to form a mechanical bonding or micro-metallurgical bonding coating, and the processing efficiency is high.
[0057] In an exemplary embodiment, an infrared spectrum sensor 6 is further provided on the inner wall of the pre-combustion chamber housing 1, which is suitable for detecting the hydrogen concentration in the reformed products.
[0058] In such an embodiment, the hydrogen concentration is detected by the infrared spectrum sensor 6, so as to calculate the ratio of (the first fuel + air) of the reformed products and the premixed gas in the pre-combustion chamber, so as to adjust the working parameters of the engine system.
[0059] In some alternative embodiments, the infrared spectrum sensor 6 can also assist in correcting the ratio between the reformed products and the premixed gas by detecting the carbon monoxide concentration. When adjusting the working parameters of the engine system, it includes but is not limited to adjusting the fuel injection advance angle, ignition advance angle or fuel injection pulse width.
[0060] In an exemplary embodiment, the engine system further includes an electronic control unit 7, which is configured to adjust the fuel amount sprayed by the nozzle 4 and / or the ignition advance angle of the spark plug 5.
[0061] In such an embodiment, the electronic control unit 7 is configured to receive the data collected by the engine system sensors, such as the hydrogen concentration obtained by the infrared spectroscopy sensor 6 in the above embodiment, and after data processing, issue commands and send them to the spark plug 5. Alternatively, analyze and process the engine system speed and throttle pedal opening, issue commands and send them to the nozzle 4.
[0062] Figure 4 It is a flowchart of the control method provided by the exemplary embodiment of the present disclosure.
[0063] The exemplary embodiment of the present disclosure also provides a control method for controlling the engine system in any of the above embodiments, such as Figure 4 as shown, including the following steps S1 - S2.
[0064] Step S1, obtain the speed and throttle pedal opening information, and judge the operating condition.
[0065] Step S2, adjust the fuel quantity ejected by the nozzle 4 according to the operating condition.
[0066] In such an embodiment, relevant information is obtained through the crankshaft sensor and the throttle pedal opening sensor, the operating condition of the engine system is comprehensively judged, and the ejection quantity of the first fuel is adjusted according to the operating condition, so that the proportion of the reformed products in the pre - combustion chamber matches the operating condition.
[0067] Exemplarily, it is described with both the first fuel and the second fuel being gasoline. When the speed is less than the reference speed (usually selected as 500 - 1500 revolutions per minute) and the throttle pedal opening is less than 30%, it is determined as the cold - start condition. At this time, the fuel evaporation in the main combustion chamber and the pre - combustion chamber is poor, and the mixing effect with air is not good. Therefore, the proportion of the reformed products is adjusted to 30% - 50% to improve the flame propagation speed with the help of hydrogen, carbon monoxide, etc., and enhance the cold - start success rate.
[0068] After the speed is higher than the reference speed, when the throttle pedal opening is between 0 - 30%, it is determined as the low - load condition (such as idling, light - load driving). At this time, the combustion efficiency is low, and a relatively high proportion of reformed products, about 20% - 40%, is still required to stabilize ignition and reduce nitrogen oxide emissions. When the throttle pedal opening is between 30% - 70%, it is determined as the medium - load condition (such as driving in the city, on the expressway). At this time, the proportion of reformed products is about 10% - 25% to balance ignition stability and economy. When the throttle pedal opening is between 70% - 100%, it is determined as the high - load condition (such as driving at high speed, fully - loaded). At this time, the fuel injection quantity in the main combustion chamber increases significantly, the temperatures in the main combustion chamber and the pre - combustion chamber are high, and the proportion of reformed products is adjusted to about 5% - 15% to reduce energy loss.
[0069] According to the embodiment of the present disclosure, such as Figure 4As shown, the control method further includes the following steps S3 - S4.
[0070] Step S3: Obtain the concentration of the reformate in the pre - combustion chamber.
[0071] Step S4: Adjust the ignition advance angle of the spark plug 5 according to the concentration of the reformate.
[0072] In such an embodiment, the volume fraction of hydrogen in the pre - combustion chamber is measured by the infrared spectrum sensor 6, the concentration of the reformate is deduced, and further the ignition advance angle of the spark plug 5 is adjusted.
[0073] Exemplarily, taking a naturally aspirated engine as an example, when there is no reformate, the basic ignition advance angle is 12° - 15° before top dead center. When the hydrogen concentration is 20% - 30%, the ignition advance angle is not adjusted. When the hydrogen concentration is greater than 30%, the ignition advance angle is reduced by 2° - 4°; when the hydrogen concentration is between 10% - 20%, the ignition advance angle is increased by 2° - 4°; when the hydrogen concentration is less than 10%, the ignition advance angle is increased by 5° - 8°.
[0074] Those skilled in the art can understand that the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present disclosure.
[0075] The embodiments of the present disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and all such substitutions and modifications should fall within the scope of the present disclosure.
Claims
1. An engine system, comprising a cylinder block (8) and a cylinder head (9), wherein the cylinder block (8) and the cylinder head (9) define a main combustion chamber, characterized in that: Also includes: A pre-combustion chamber housing (1) is mounted on the cylinder head (9), the inner wall of which is coated with a reforming catalytic coating (2), and a through hole is formed in the pre-combustion chamber housing (1); A pre-combustion chamber top cover (3) sealed on the pre-combustion chamber shell (1) to define a pre-combustion chamber; The nozzle (4) is adapted to inject a first fuel into the pre-combustion chamber, the reforming catalytic coating (2) being configured to catalyze a reforming reaction between a portion of the first fuel and air to generate a reforming product in response to the reforming catalytic coating (2) being at a preset temperature; The spark plug (5) is suitable for igniting a first mixed gas composed of another portion of the first fuel, the reformed product and air in the pre-combustion chamber, so that the flame passes through the through hole to ignite a second mixed gas composed of the second fuel and air in the main combustion chamber.
2. The engine system according to claim 1, characterized in that: The pre-combustion chamber housing (1) comprises: An inner shell (11), the reforming catalytic coating (2) being coated on the inner wall of the inner shell (11); An outer shell (12) is coated on the outside of the inner shell (11), and a resistance wire (13) is embedded in the interior of the outer shell (12). The resistance wire (13) is configured to heat the outer shell (12) in response to the engine system being in a cold start condition, so as to raise the temperature of the reforming catalytic coating (2) to the preset temperature.
3. The engine system according to claim 2, characterized in that: A channel for laying out the resistance wire (13) is provided in the outer shell (12), and the channel is filled with insulating heat-conductive material to separate the resistance wire (13) from the outer shell (12).
4. The engine system according to claim 2, characterized in that: The inner surface of the inner shell (11) is formed with a plurality of recesses or protrusions.
5. The engine system according to claim 4, characterized in that: The shape of the concave pit or the convex protrusion is configured in any one of a hexagon, a circle, an ellipse, a triangle and a square.
6. The engine system according to claim 1, characterized in that: The reforming catalytic coating (2) is coated on the inner wall of the pre-combustion chamber shell (1) by laser cladding or plasma spraying technology.
7. The engine system according to claim 1, characterized in that: The inner wall of the pre-combustion chamber shell (1) is also provided with an infrared spectrum sensor (6) suitable for detecting the concentration of hydrogen in the reformed product.
8. The engine system according to claim 1, characterized in that: It also includes an electronic control unit (7) configured to adjust the amount of fuel sprayed by the nozzle (4) and / or the ignition advance angle of the spark plug (5).
9. A control method, characterized in that: Used to control the engine system according to any one of claims 1 to 8, comprising: Obtain speed and accelerator pedal opening information to determine operating conditions; The amount of fuel sprayed by the nozzle (4) is adjusted according to the operating conditions.
10. The control method according to claim 9, characterized in that: Also includes: Obtaining the concentration of reforming products in the precombustion chamber; The ignition advance angle of the spark plug (5) is adjusted according to the reforming product concentration.