Ignition method and device of methanol engine, medium and methanol engine system

Abstract

The invention provides an ignition method and device of a methanol engine, a medium and a methanol engine system. According to the method, whether preignition or detonation occurs or not is determined by analyzing the pressure and temperature at the current moment, the ignition mode can be intelligently adjusted according to the fault judgment result, if potential preignition or detonation is detected, the system is adjusted to the ignition mode using more spark plugs from the initial ignition mode, and the ignition efficiency is improved. For example, a main spark plug and all auxiliary spark plugs are used at the same time or only the main spark plug is used for ignition, instability in the combustion process is reduced, the abnormal combustion phenomenon is restrained, once the final ignition mode is determined, the system conducts ignition according to the mode, and therefore on the premise that the performance of the engine is not sacrificed, the ignition efficiency is improved. And faults such as preignition and knocking are effectively controlled, so that the problem that the preignition and knocking phenomena of the methanol engine in the ignition period are difficult to restrain in an existing scheme is solved.

Description

Technical Field

[0001] The present application relates to the technical field of methanol engines, and in particular to a methanol engine ignition method, a methanol engine ignition device, a computer-readable storage medium, and a methanol engine system. Background Art

[0002] Existing methanol engines have difficulty starting at low temperatures, especially in cold regions and during cold seasons. Methanol's low vapor pressure and lack of volatility result in low intake air temperatures, which in turn affect starting performance. Furthermore, under high-load conditions, methanol engines are prone to abnormal combustion phenomena such as pre-ignition and detonation, which limits the compression ratio and, in turn, affects the engine's thermal efficiency.

[0003] That is, the existing solutions are difficult to suppress the pre-ignition and detonation phenomena of methanol engines during the ignition period. Summary of the Invention

[0004] The main purpose of this application is to provide a methanol engine ignition method, a methanol engine ignition device, a computer-readable storage medium and a methanol engine system, so as to at least solve the problem that the existing solutions are difficult to suppress the pre-ignition and detonation phenomena of the methanol engine during the ignition period.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present application, a method for igniting a methanol engine is provided, which is applied to a controller in a methanol engine system, wherein the methanol engine system also includes a main spark plug and three auxiliary spark plugs, wherein the main spark plug is installed at the top center position of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug. The method includes: obtaining the pressure and / or temperature in the cylinder at the current moment to obtain the current pressure and / or current temperature; determining a judgment result based on the current pressure and / or the current temperature, wherein the judgment result indicates whether a target fault occurs in the methanol engine, wherein the target fault includes at least one of the following: pre-ignition and knock; determining whether to modify the initial ignition mode based on the judgment result to determine a final ignition mode, and using the final ignition mode for ignition, wherein the initial ignition mode indicates ignition using the three auxiliary spark plugs, and the final ignition mode is one of the following: ignition using the three auxiliary spark plugs, ignition using the main spark plug and the three auxiliary spark plugs, and ignition using the main spark plug.

[0006] Optionally, based on the judgment result, determine whether to modify the initial ignition mode to determine the final ignition mode, including: when the judgment result indicates that the target fault has occurred in the methanol engine, modify the initial ignition mode to use the main spark plug and the three auxiliary spark plugs for ignition, to determine that the final ignition mode is to use the main spark plug and the three auxiliary spark plugs for ignition; when the judgment result indicates that the target fault has not occurred in the methanol engine, modify the initial ignition mode to use the main spark plug for ignition to obtain the current ignition mode, and re-determine the judgment result; based on the re-determined judgment result, determine whether to modify the current ignition mode to determine the final ignition mode.

[0007] Optionally, based on the re-determined judgment result, it is determined whether to modify the current ignition mode to determine the final ignition mode, including: when the re-determined judgment result indicates that the target fault has not occurred in the methanol engine, determining that there is no need to modify the current ignition mode to determine that the final ignition mode is the current ignition mode; when the re-determined judgment result indicates that the target fault has occurred in the methanol engine, modifying the current ignition mode to use the three auxiliary spark plugs for ignition to determine that the final ignition mode is use the three auxiliary spark plugs for ignition.

[0008] Optionally, after determining the final ignition mode, the method further includes: determining the number of occurrences of the target fault within a preset time period to obtain the current number of occurrences; and adjusting the ignition number and / or ignition time of the methanol engine according to the current number of occurrences.

[0009] Optionally, a judgment result is determined based on the current pressure, and the judgment result indicates whether a target fault has occurred in the methanol engine, including: when the current pressure is greater than or equal to a pressure threshold, determining that the judgment result indicates that the target fault has occurred in the methanol engine; when the current pressure is less than the pressure threshold, determining that the judgment result indicates that the target fault has not occurred in the methanol engine.

[0010] Optionally, a judgment result is determined based on the current temperature, including: when the current temperature is greater than or equal to a temperature threshold, determining that the judgment result indicates that the target fault has occurred in the methanol engine; when the current temperature is less than the temperature threshold, determining that the judgment result indicates that the target fault has not occurred in the methanol engine.

[0011] Optionally, a judgment result is determined based on the current pressure and the current temperature, including: when the current pressure is greater than or equal to a pressure threshold, and the current temperature is greater than or equal to a temperature threshold, determining that the judgment result indicates that the target fault has occurred in the methanol engine; when the current pressure is less than the pressure threshold, and / or the current temperature is less than the temperature threshold, determining that the judgment result indicates that the target fault has not occurred in the methanol engine.

[0012] According to another aspect of the present application, an ignition device for a methanol engine is provided, which includes: an acquisition unit for acquiring the pressure and / or temperature in the cylinder at a current moment to obtain the current pressure and / or current temperature; a first determination unit for determining a judgment result based on the current pressure and / or current temperature, wherein the judgment result characterizes whether a target fault occurs in the methanol engine, and the target fault includes at least one of the following: pre-ignition, detonation; a second determination unit for determining whether to modify the initial ignition mode based on the judgment result to determine a final ignition mode, and ignite using the final ignition mode, wherein the initial ignition mode characterizes ignition using three auxiliary spark plugs, and the final ignition mode is one of the following: ignition using the three auxiliary spark plugs, ignition using the main spark plug and the three auxiliary spark plugs, and ignition using the main spark plug, wherein the main spark plug is installed to the top center position of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug.

[0013] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the system includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the methods described.

[0014] According to another aspect of the present application, a methanol engine system is provided, which includes: a controller, a main spark plug and three auxiliary spark plugs, wherein the main spark plug is installed to the top center position of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug, and the controller is used to execute any one of the described methods.

[0015] By applying the technical solution of the present application, the pressure and temperature at the current moment are analyzed to determine whether pre-ignition or knock has occurred. According to the fault judgment result, the ignition mode can be intelligently adjusted. If potential pre-ignition or knock is detected, the system will adjust the initial ignition mode (ignition using only auxiliary spark plugs) to an ignition mode using more spark plugs, such as using the main spark plug and all auxiliary spark plugs at the same time, or only using the main spark plug for ignition, so as to reduce instability in the combustion process and suppress the occurrence of abnormal combustion. Once the final ignition mode is determined, the system will execute ignition in this way, thereby effectively controlling pre-ignition, knock and other faults without sacrificing engine performance, avoiding the overly conservative ignition strategy in traditional methods, enabling the methanol engine to achieve higher thermal efficiency and power performance under high load conditions, reducing the mechanical stress inside the engine, and extending the service life of the engine, thereby solving the problem that the existing scheme is difficult to suppress pre-ignition and knock in the methanol engine during the ignition period. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0017] Figure 1 A schematic diagram showing the positional relationship between three peripheral auxiliary spark plugs and one central main spark plug provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic flow chart of an ignition method for a methanol engine according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic flow chart of an ignition method for a methanol engine according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic flow chart of an ignition method for a methanol engine according to an embodiment of the present application is shown;

[0021] Figure 5 A schematic flow chart of another methanol engine ignition method provided according to an embodiment of the present application is shown;

[0022] Figure 6 A structural block diagram of an ignition device for a methanol engine provided according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] As described in the background, existing methanol engines have difficulty starting at low temperatures, particularly in cold regions and during cold seasons. This is due to methanol's low vapor pressure and its low volatility, which results in low intake air temperatures and thus affects the engine's starting performance. Furthermore, under high-load conditions, methanol engines are prone to abnormal combustion phenomena such as pre-ignition and knock, which limits the compression ratio and, in turn, affects the engine's thermal efficiency. To address the difficulty existing solutions have in suppressing pre-ignition and knock during ignition in methanol engines, embodiments of the present application provide a methanol engine ignition method, a methanol engine ignition device, a computer-readable storage medium, and a methanol engine system.

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] In this embodiment, a method for igniting a methanol engine is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0029] The method is applied to a controller in a methanol engine system. The methanol engine system further includes a main spark plug and three auxiliary spark plugs. The main spark plug is mounted at the top center of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug. Three peripheral auxiliary spark plugs (peripheral auxiliary spark plug 1, peripheral auxiliary spark plug 2, and peripheral auxiliary spark plug 3) are equidistantly arranged around the central main spark plug, such as Figure 1 shown.

[0030] Figure 2 FIG. 1 is a flow chart of a methanol engine ignition method according to an embodiment of the present application. Figure 2 As shown, the method includes the following steps:

[0031] Step S201, obtaining the pressure and / or temperature in the cylinder at the current moment to obtain the current pressure and / or current temperature;

[0032] Step S202: determining a judgment result based on the current pressure and / or the current temperature, wherein the judgment result indicates whether a target fault occurs in the methanol engine, wherein the target fault includes at least one of the following: pre-ignition and knock;

[0033] Pre-ignition: A random, sporadic, and severely destructive abnormal combustion phenomenon that occurs during the operation of a hydrogen internal combustion engine. It is caused by self-ignition rather than spark plug ignition; the ignition delay is significantly shorter, and the start time of combustion caused by self-ignition is within 10 degrees CA earlier than the ignition advance angle; sometimes it is accompanied by strong high-frequency pressure vibrations caused by the self-ignition of the terminal mixture.

[0034] Detonation: Under certain conditions, the combustion of a hydrogen engine becomes abnormal, and the pressure curve fluctuates greatly at high frequencies. At this time, the flame propagation speed and the shape of the flame front change dramatically, accompanied by a metallic vibration sound.

[0035] Step S203, based on the above judgment result, determines whether to modify the initial ignition mode to determine the final ignition mode, and adopts the above final ignition mode for ignition. The above initial ignition mode is characterized by adopting the above three auxiliary spark plugs for ignition, and the above final ignition mode is one of the following: adopting the above three auxiliary spark plugs for ignition, adopting the above main spark plug and the above three auxiliary spark plugs for ignition, or adopting the above main spark plug for ignition.

[0036] In the above steps, the pressure and temperature at the current moment are analyzed to determine whether pre-ignition or knock has occurred. Based on the fault judgment result, the ignition mode can be intelligently adjusted. If potential pre-ignition or knock is detected, the system will adjust from the initial ignition mode (ignition using only auxiliary spark plugs) to an ignition mode using more spark plugs, such as using the main spark plug and all auxiliary spark plugs at the same time, or only using the main spark plug for ignition, so as to reduce instability in the combustion process and suppress the occurrence of abnormal combustion. Once the final ignition mode is determined, the system will execute ignition according to this mode, thereby effectively controlling pre-ignition, knock and other faults without sacrificing engine performance, avoiding the overly conservative ignition strategy in traditional methods, enabling the methanol engine to achieve higher thermal efficiency and power performance under high load conditions, reducing the mechanical stress inside the engine, and extending the engine life, thereby solving the problem that existing solutions are difficult to suppress pre-ignition and knock in the methanol engine during ignition.

[0037] In one embodiment of the present application, Figure 3 As shown, in step S203, determining whether to modify the initial ignition mode based on the above judgment result to determine the final ignition mode includes the following steps:

[0038] Step S301, when the judgment result indicates that the methanol engine has the target fault, the initial ignition mode is modified to ignite using the main spark plug and the three auxiliary spark plugs, so as to determine that the final ignition mode is ignited using the main spark plug and the three auxiliary spark plugs;

[0039] Step S302: if the judgment result indicates that the methanol engine has not suffered the target fault, the initial ignition mode is modified to ignite using the main spark plug, a current ignition mode is obtained, and the judgment result is re-determined;

[0040] Step S303: Determine whether to modify the current ignition mode according to the re-determined judgment result to determine the final ignition mode.

[0041] This application also provides a specific use case for step S203: starting a car on a cold winter morning. The ambient temperature is very low, and the engine intake air temperature is also correspondingly low. This poses challenges to the evaporation and vaporization of methanol, leading to starting difficulties. As the driver gradually drives the car into high-load conditions, such as on a highway, the engine's combustion conditions become complex, making pre-ignition or knock more likely. This is when the ignition system and control strategy of this application come into play.

[0042] Starting Conditions: When the vehicle is started, the system automatically uses all four spark plugs (the central main spark plug and three auxiliary spark plugs) for ignition, ensuring a quick and stable engine start even at extremely low temperatures. This strategy increases the number of ignition points, thereby enhancing ignition energy, promoting better methanol vaporization and combustion, and overcoming the challenge of low-temperature starting.

[0043] High-load conditions: When the vehicle enters high-speed driving or high-load conditions requiring high torque output, the system determines whether there is a risk of pre-ignition or knock based on real-time monitoring of in-cylinder pressure and temperature. If signs of abnormal combustion are detected, the system immediately adjusts the ignition method, employing a final ignition method (step S301) that simultaneously fires the central main spark plug and all three auxiliary spark plugs. This minimizes flame propagation distance, suppresses pre-ignition and knock, and ensures engine stability and efficiency.

[0044] If the system determines that no pre-ignition or knock is occurring under the current engine operating conditions (i.e., step S302), it will attempt to switch to the current ignition mode, which uses only the center main spark plug. The system will then monitor the combustion status again. If it confirms that the engine is operating normally with no pre-ignition or knock under single spark plug ignition (i.e., step S303), this ignition mode will be set as the final ignition mode. This ensures normal engine operation while optimizing ignition energy and improving fuel economy and thermal efficiency.

[0045] Beneficial effects of a specific usage scenario of step S203: In a low-temperature environment, all four spark plugs are used for ignition, which significantly improves the success rate of starting and reduces the risk of starting failure or delay; under high-load conditions, the ignition mode is adjusted in real time through an intelligent control strategy, which effectively suppresses pre-ignition and detonation, improves combustion stability and efficiency, and protects the engine from damage caused by abnormal combustion; by dynamically selecting the most appropriate ignition mode, unnecessary energy waste is avoided, and the thermal efficiency and overall energy efficiency of the methanol engine are improved, thereby saving fuel and reducing emissions; stable and reliable starting and operating conditions without abnormal combustion not only ensure the power performance of the vehicle, but also reduce engine vibration and noise, and improve the comfort and satisfaction of the driver.

[0046] In one embodiment of the present application, step S303, i.e., determining whether to modify the current ignition mode based on the re-determined judgment result to determine the final ignition mode, includes the following steps:

[0047] Step S401: if the re-determined judgment result indicates that the methanol engine has not suffered the target fault, determining that there is no need to modify the current ignition mode, and determining the final ignition mode to be the current ignition mode;

[0048] Step S402, when the above-determined judgment result again indicates that the above-mentioned target fault occurs in the above-mentioned methanol engine, the above-mentioned current ignition mode is modified to use the above-mentioned three auxiliary spark plugs for ignition, so as to determine that the final ignition mode is to use the above-mentioned three auxiliary spark plugs for ignition.

[0049] This application also passes a specific use case for step S303: Consider a sports car equipped with a methanol engine, with the driver enjoying a mountain road. In such a scenario, the vehicle's load and driving conditions can change rapidly, from low-load cruising to high-load acceleration and then back to medium-load steady driving. These changes require the engine to operate stably and efficiently under different operating conditions.

[0050] High-load acceleration: When the driver presses the accelerator to accelerate, the engine load increases instantaneously, and the system monitors changes in in-cylinder pressure and temperature. If, while using the main spark plug for ignition, the system determines that the methanol engine is experiencing pre-ignition or knock (i.e., the re-determination result in step S302), the system immediately adjusts the ignition method to three auxiliary spark plugs (i.e., step S402) to shorten the flame propagation distance, reduce combustion time, and effectively suppress abnormal combustion. In this case, the final ignition method is determined to be three auxiliary spark plugs to ensure engine stability and efficiency during high-load acceleration.

[0051] Steady Driving Condition: When the driver returns to a steady driving state, the engine load decreases, and the system's monitored in-cylinder pressure and temperature are within normal ranges. If the re-determination result at this point indicates that the methanol engine has not experienced the target fault (i.e., the re-determination result in step S302), the system will confirm that no modification to the current ignition mode is necessary and will determine the current ignition mode (e.g., using only the main spark plug for ignition) as the final ignition mode (i.e., step S401). This ensures stable combustion while reducing energy consumption and improving the engine's thermal efficiency and economy.

[0052] Beneficial effects of a specific use case of step S303: Steps S401 and S402 demonstrate the system's intelligent decision-making capabilities, dynamically adjusting the ignition strategy based on real-time combustion parameters (pressure and temperature), promptly responding to and suppressing pre-ignition or knock, and ensuring stable engine operation under various operating conditions. During high-load acceleration, the use of auxiliary spark plugs suppresses abnormal combustion, ensuring unimpeded engine power output and a smoother, more powerful driving experience for the driver. During steady driving, the system employs a more economical ignition method, helping to improve fuel economy, extend mileage, and reduce fuel consumption and emissions. By effectively suppressing pre-ignition and knock, the impact and wear of abnormal combustion on internal engine components is reduced, extending engine life and reducing maintenance costs. Abnormal combustion, particularly knock, can cause unusual engine sounds and increased vibration, even damaging the engine and compromising vehicle safety. This strategy significantly mitigates these risks by intelligently adjusting the ignition method, enhancing overall vehicle safety.

[0053] like Figure 1 As shown in the figure, the new ignition method hardware of methanol engine consists of 1 central main spark plug and 3 peripheral auxiliary spark plugs (evenly distributed around the cylinder). Figure 4 Different operating conditions and areas use different ignition methods. The details are as follows:

[0054] Starting conditions: The methanol engine uses a central main spark plug and four peripheral auxiliary spark plugs to work together for ignition, ensuring smooth starting even in extremely cold weather.

[0055] Operating conditions: Under the operating conditions of the methanol engine, different ignition methods can be used according to the different operating load conditions of the engine:

[0056] Operating condition area 1 (low load condition): The methanol engine uses a central main spark plug and three peripheral auxiliary spark plugs to work together for ignition, which improves the ignition energy and reduces the engine combustion cycle variation.

[0057] Operating Condition Zone 2 (Medium Load): The methanol engine uses center main spark plug ignition. In medium load conditions, the cylinder temperature is high, ensuring efficient operation using only the center main spark plug.

[0058] Operating Condition Zone 3 (High Load): The methanol engine utilizes three spark plugs positioned around the cylinder for ignition. Under high load conditions, high cylinder temperatures can easily lead to pre-ignition and knock. Simultaneous ignition by these three spark plugs shortens the flame propagation distance, effectively addressing abnormal combustion issues such as pre-ignition and knock.

[0059] It effectively solves the problems of cold start at low temperature and abnormal combustion under high load, not only improves the combustion stability and thermal efficiency of the methanol engine, but also effectively solves the reliability problem of the methanol engine.

[0060] In one embodiment of the present application, after determining the final ignition mode, the above method also includes: determining the number of occurrences of the above target fault within a preset time period to obtain the current number of occurrences; and adjusting the ignition number and / or ignition time of the above methanol engine according to the above current number of occurrences.

[0061] By counting the frequency of target faults, the system can more accurately identify occasional abnormal combustion events and persistent issues. This helps distinguish temporary operating condition changes from long-term combustion instability, enabling more targeted control strategies. If multiple pre-ignition or knock events are detected within a preset timeframe, the system may adjust the number of ignitions or ignition timing, such as using more frequent ignition cycles or adjusting the ignition advance angle, to adapt to the current combustion conditions and reduce the occurrence of abnormal combustion. Conversely, if the fault occurs infrequently, the system may reduce the number of ignitions or fine-tune the ignition timing to improve fuel efficiency and reduce energy consumption. Frequent occurrence of target faults may indicate potential internal engine issues, such as combustion chamber carbon deposits, spark plug aging, or malfunctions in other combustion system components. Based on the frequency of the fault, the system can generate a warning signal to the driver or maintenance personnel, recommending inspection or maintenance to prevent a more serious problem.

[0062] In one embodiment of the present application, when only pressure is considered, a judgment result is determined based on the above-mentioned current pressure, and the above-mentioned judgment result characterizes whether the above-mentioned methanol engine has a target fault, including: when the above-mentioned current pressure is greater than or equal to the pressure threshold, determining that the above-mentioned judgment result characterizes that the above-mentioned target fault has occurred in the above-mentioned methanol engine; when the above-mentioned current pressure is less than the above-mentioned pressure threshold, determining that the above-mentioned judgment result characterizes that the above-mentioned target fault has not occurred in the above-mentioned methanol engine.

[0063] The pressure threshold can be determined based on historical pressure data. By monitoring in-cylinder pressure in real time, the system can instantly identify abnormal pressure increases, which are often a sign of pre-ignition or knock. Because pressure changes are a direct indicator of abnormal combustion, this method provides the fastest and most direct basis for fault diagnosis, enabling the system to respond quickly and avoid potential damage from abnormal combustion. Setting an appropriate pressure threshold can distinguish between pressure changes during normal combustion and high-pressure fluctuations caused by abnormal combustion (pre-ignition or knock). This method reduces false positives and false negatives, ensuring accurate fault diagnosis. Once the pressure exceeds the threshold, the system clearly identifies the target fault, while pressure below the threshold indicates that the combustion process is within normal range. Based on the fault diagnosis results based on the pressure threshold, the system automatically adjusts the ignition strategy. If pre-ignition or knock is detected, the system can immediately switch to a safer ignition method (such as using both the main and auxiliary spark plugs). When combustion is normal, a more efficient ignition method (such as using only the main spark plug) can be used. This adaptive adjustment capability ensures optimal engine operation under different operating conditions.

[0064] In one embodiment of the present application, when only the temperature is considered, a judgment result is determined based on the above-mentioned current temperature, including: when the above-mentioned current temperature is greater than or equal to the temperature threshold, determining that the above-mentioned judgment result indicates that the above-mentioned target fault has occurred in the above-mentioned methanol engine; when the above-mentioned current temperature is less than the above-mentioned temperature threshold, determining that the above-mentioned judgment result indicates that the above-mentioned target fault has not occurred in the above-mentioned methanol engine.

[0065] Temperature thresholds can be determined based on historical temperatures. Temperature is a key indicator of the thermodynamic state within the engine's combustion chamber. By setting appropriate temperature thresholds, the system can more accurately distinguish between normal combustion temperatures and high-temperature peaks caused by abnormal combustion (pre-ignition or knock), reducing the possibility of misjudgment. This real-time monitoring based on temperature thresholds provides a more accurate data basis for fault warning. Once the current temperature reaches or exceeds the threshold, the system immediately determines the occurrence of the target fault and triggers appropriate control strategy adjustments, such as switching the ignition method. This immediate response mechanism helps to quickly suppress abnormal combustion, preventing further damage to engine performance and internal components. Abnormally high temperatures are often a sign of reduced combustion efficiency and increased heat loss. By monitoring the temperature threshold, the system can proactively adjust the ignition strategy, optimize the combustion process, and avoid excessive heat loss, thereby improving the engine's overall thermal efficiency and enhancing the vehicle's fuel economy and power performance.

[0066] In one embodiment of the present application, while taking pressure and temperature into consideration at the same time, a judgment result is determined based on the above-mentioned current pressure and the above-mentioned current temperature, including: when the above-mentioned current pressure is greater than or equal to the pressure threshold, and the above-mentioned current temperature is greater than or equal to the temperature threshold, determining that the above-mentioned judgment result indicates that the above-mentioned target fault has occurred in the above-mentioned methanol engine; when the above-mentioned current pressure is less than the above-mentioned pressure threshold, and / or the above-mentioned current temperature is less than the above-mentioned temperature threshold, determining that the above-mentioned judgment result indicates that the above-mentioned target fault has not occurred in the above-mentioned methanol engine.

[0067] Combining current pressure with a pressure threshold and current temperature with a temperature threshold, and using AND logic to determine if pre-ignition or knock has occurred, significantly improves fault diagnosis accuracy. This is because abnormal combustion is often accompanied by abnormal increases in both pressure and temperature. This dual confirmation mechanism reduces false positives and missed alarms that can result from single-parameter judgment, ensuring precise fault identification. This strategy allows the system to monitor the engine's combustion state (via pressure and temperature) in real time and respond immediately when an anomaly is detected. This immediate response is crucial for suppressing pre-ignition and knock, as it allows for rapid adjustment of the ignition strategy to prevent serious damage to the engine caused by abnormal combustion. Through comprehensive analysis of pressure and temperature, the system intelligently distinguishes between normal pressure and temperature fluctuations caused by varying workloads and true abnormal combustion events. This intelligent distinction helps the system adopt the most appropriate control strategy for different operating conditions (such as starting, acceleration, deceleration, or steady driving), ensuring both engine efficiency and safety. Fault diagnosis based on pressure and temperature thresholds enables the system to precisely adjust the ignition strategy, for example, using multiple spark plugs for ignition at high pressure and temperature, while using fewer spark plugs at normal or lower combustion pressures and temperatures. This not only suppresses abnormal combustion, but also optimizes fuel consumption and improves the overall efficiency of the engine while ensuring stable engine operation.

[0068] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the methanol engine ignition method of the present application will be described in detail below with reference to specific embodiments.

[0069] This embodiment relates to a specific ignition method for a methanol engine, such as Figure 5 As shown, the following steps are included:

[0070] The initial ignition mode is characterized by ignition using three auxiliary spark plugs, and the final ignition mode is one of the following: ignition using three auxiliary spark plugs, ignition using the main spark plug and three auxiliary spark plugs, and ignition using the main spark plug;

[0071] Determine the initial ignition mode to characterize the use of three auxiliary spark plugs for ignition;

[0072] Obtaining the pressure and / or temperature in the cylinder at a current moment to obtain the current pressure and / or current temperature; determining a judgment result based on the current pressure and / or current temperature, the judgment result indicating whether a target fault occurs in the methanol engine, the target fault including at least one of the following: pre-ignition and knock;

[0073] If the judgment result indicates that the methanol engine has a target fault, the initial ignition mode is modified to ignite using the main spark plug and three auxiliary spark plugs, so as to determine that the final ignition mode is ignited using the main spark plug and three auxiliary spark plugs;

[0074] If the judgment result indicates that the methanol engine has not suffered the target fault, the initial ignition mode is modified to be ignited using the main spark plug, the current ignition mode is obtained, and the judgment result is re-determined;

[0075] If the re-determined judgment result indicates that the target fault has not occurred in the methanol engine, it is determined that there is no need to modify the current ignition mode, so that the final ignition mode is determined to be the current ignition mode;

[0076] If the re-determined judgment result indicates that the target fault has occurred in the methanol engine, the current ignition mode is modified to be ignited using three auxiliary spark plugs, so as to determine that the final ignition mode is ignited using three auxiliary spark plugs;

[0077] Ignition is performed using the final ignition method.

[0078] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0079] The embodiment of the present application also provides an ignition device for a methanol engine. It should be noted that the ignition device for a methanol engine in the embodiment of the present application can be used to execute the ignition method for a methanol engine provided in the embodiment of the present application. The device is used to implement the above-mentioned embodiments and preferred embodiments, and the details that have been explained will not be repeated here. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and conceivable.

[0080] The following is an introduction to the ignition device of the methanol engine provided in the embodiment of the present application.

[0081] Figure 6 This is a structural block diagram of an ignition device for a methanol engine according to an embodiment of the present application. Figure 6 As shown, the device includes:

[0082] An acquisition unit 61 is used to acquire the pressure and / or temperature inside the cylinder at the current moment to obtain the current pressure and / or current temperature; a first determination unit 62 is used to determine a judgment result based on the current pressure and / or current temperature, wherein the judgment result indicates whether a target fault occurs in the methanol engine, and the target fault includes at least one of the following: pre-ignition and knock; a second determination unit 63 is used to determine whether the initial ignition mode is modified based on the judgment result to determine the final ignition mode, and to use the final ignition mode for ignition, wherein the initial ignition mode indicates ignition using three auxiliary spark plugs, and the final ignition mode is one of the following: ignition using the three auxiliary spark plugs, ignition using the main spark plug and the three auxiliary spark plugs, and ignition using the main spark plug, wherein the main spark plug is installed at the top center position of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug.

[0083] In the above-mentioned device, by analyzing the pressure and temperature at the current moment, it is determined whether pre-ignition or knock has occurred. According to the fault judgment result, the ignition mode can be intelligently adjusted. If potential pre-ignition or knock is detected, the system will adjust from the initial ignition mode (ignition using only auxiliary spark plugs) to an ignition mode using more spark plugs, such as using the main spark plug and all auxiliary spark plugs at the same time, or only using the main spark plug for ignition, so as to reduce instability in the combustion process and suppress the occurrence of abnormal combustion. Once the final ignition mode is determined, the system will execute ignition according to this mode, thereby effectively controlling pre-ignition, knock and other faults without sacrificing engine performance, avoiding the overly conservative ignition strategy in traditional methods, enabling the methanol engine to achieve higher thermal efficiency and power performance under high-load conditions, reducing the mechanical stress inside the engine, and extending the engine service life, thereby solving the problem that existing solutions are difficult to suppress pre-ignition and knock in methanol engines during ignition.

[0084] In one embodiment of the present application, the second determination unit includes: a first processing module for modifying the above-mentioned initial ignition mode to ignite using the above-mentioned main spark plug and the above-mentioned three auxiliary spark plugs when the above-mentioned judgment result indicates that the above-mentioned target fault has occurred in the above-mentioned methanol engine, so as to determine that the above-mentioned final ignition mode is ignited using the above-mentioned main spark plug and the above-mentioned three auxiliary spark plugs; a second processing module for modifying the above-mentioned initial ignition mode to ignite using the above-mentioned main spark plug when the above-mentioned judgment result indicates that the above-mentioned target fault has not occurred in the above-mentioned methanol engine, so as to obtain the current ignition mode and re-determine the above-mentioned judgment result; a third processing module for determining whether to modify the above-mentioned current ignition mode based on the above-mentioned judgment result determined again, so as to determine the above-mentioned final ignition mode.

[0085] In low-temperature environments, all four spark plugs are used for ignition, which significantly improves the success rate of starting and reduces the risk of starting failure or delay. Under high-load conditions, the ignition mode is adjusted in real time through intelligent control strategies, effectively suppressing pre-ignition and detonation, improving combustion stability and efficiency, and protecting the engine from damage caused by abnormal combustion. By dynamically selecting the most appropriate ignition mode, unnecessary energy waste is avoided, and the thermal efficiency and overall energy efficiency of the methanol engine are improved, thereby saving fuel and reducing emissions. Stable and reliable starting and operating conditions without abnormal combustion not only ensure the vehicle's power performance, but also reduce engine vibration and noise, and improve the driver's comfort and satisfaction.

[0086] In one embodiment of the present application, the third processing module includes: a first processing submodule for determining that there is no need to modify the current ignition mode when the above-mentioned judgment result determined again indicates that the above-mentioned target fault has not occurred in the above-mentioned methanol engine, so as to determine that the above-mentioned final ignition mode is the above-mentioned current ignition mode; a second processing submodule for modifying the above-mentioned current ignition mode to ignite using the above-mentioned three auxiliary spark plugs when the above-mentioned judgment result determined again indicates that the above-mentioned target fault has occurred in the above-mentioned methanol engine, so as to determine that the final ignition mode is ignited using the above-mentioned three auxiliary spark plugs.

[0087] During high-load acceleration, auxiliary spark plugs suppress abnormal combustion, ensuring unimpeded engine power output and a smoother, more powerful driving experience. During steady driving, the system employs a more economical ignition method, helping improve fuel economy, extend mileage, and reduce fuel consumption and emissions. By effectively suppressing pre-ignition and detonation, the impact and wear of abnormal combustion on internal engine components is reduced, helping to extend engine life and reduce maintenance costs. However, abnormal combustion (especially detonation) can cause unusual engine sounds, increased vibration, and even damage the engine, compromising vehicle safety. This strategy significantly reduces these risks by intelligently adjusting the ignition method, enhancing overall vehicle safety.

[0088] In one embodiment of the present application, the above-mentioned device also includes: a first processing unit is used to determine the number of occurrences of the above-mentioned target fault within a preset time period after determining the final ignition mode, and obtain the current number of occurrences; the second processing unit is used to adjust the ignition number and / or ignition time of the above-mentioned methanol engine according to the above-mentioned current number of occurrences.

[0089] By counting the frequency of target faults, the system can more accurately identify occasional abnormal combustion events and persistent issues. This helps distinguish temporary operating condition changes from long-term combustion instability, enabling more targeted control strategies. If multiple pre-ignition or knock events are detected within a preset timeframe, the system may adjust the number of ignitions or ignition timing, such as using more frequent ignition cycles or adjusting the ignition advance angle, to adapt to the current combustion conditions and reduce the occurrence of abnormal combustion. Conversely, if the fault occurs infrequently, the system may reduce the number of ignitions or fine-tune the ignition timing to improve fuel efficiency and reduce energy consumption. Frequent occurrence of target faults may indicate potential internal engine issues, such as combustion chamber carbon deposits, spark plug aging, or malfunctions in other combustion system components. Based on the frequency of the fault, the system can generate a warning signal to the driver or maintenance personnel, recommending inspection or maintenance to prevent a more serious problem.

[0090] In one embodiment of the present application, when only pressure is considered, the second processing unit includes: a fourth processing module for determining that the above-mentioned judgment result indicates that the above-mentioned target fault has occurred in the above-mentioned methanol engine when the above-mentioned current pressure is greater than or equal to the pressure threshold; and a fifth processing module for determining that the above-mentioned judgment result indicates that the above-mentioned target fault has not occurred in the above-mentioned methanol engine when the above-mentioned current pressure is less than the above-mentioned pressure threshold.

[0091] The pressure threshold can be determined based on historical pressure data. By monitoring in-cylinder pressure in real time, the system can instantly identify abnormal pressure increases, which are often a sign of pre-ignition or knock. Because pressure changes are a direct indicator of abnormal combustion, this method provides the fastest and most direct basis for fault diagnosis, enabling the system to respond quickly and avoid potential damage from abnormal combustion. Setting an appropriate pressure threshold can distinguish between pressure changes during normal combustion and high-pressure fluctuations caused by abnormal combustion (pre-ignition or knock). This method reduces false positives and false negatives, ensuring accurate fault diagnosis. Once the pressure exceeds the threshold, the system clearly identifies the target fault, while pressure below the threshold indicates that the combustion process is within normal range. Based on the fault diagnosis results based on the pressure threshold, the system automatically adjusts the ignition strategy. If pre-ignition or knock is detected, the system can immediately switch to a safer ignition method (such as using both the main and auxiliary spark plugs). When combustion is normal, a more efficient ignition method (such as using only the main spark plug) can be used. This adaptive adjustment capability ensures optimal engine operation under different operating conditions.

[0092] In one embodiment of the present application, when only temperature is considered, the second processing unit includes: a sixth processing module for determining that the above-mentioned judgment result indicates that the above-mentioned target fault has occurred in the above-mentioned methanol engine when the above-mentioned current temperature is greater than or equal to the temperature threshold; and a seventh processing module for determining that the above-mentioned judgment result indicates that the above-mentioned target fault has not occurred in the above-mentioned methanol engine when the above-mentioned current temperature is less than the above-mentioned temperature threshold.

[0093] Temperature thresholds can be determined based on historical temperatures. Temperature is a key indicator of the thermodynamic state within the engine's combustion chamber. By setting appropriate temperature thresholds, the system can more accurately distinguish between normal combustion temperatures and high-temperature peaks caused by abnormal combustion (pre-ignition or knock), reducing the possibility of misjudgment. This real-time monitoring based on temperature thresholds provides a more accurate data basis for fault warning. Once the current temperature reaches or exceeds the threshold, the system immediately determines the occurrence of the target fault and triggers appropriate control strategy adjustments, such as switching the ignition method. This immediate response mechanism helps to quickly suppress abnormal combustion, preventing further damage to engine performance and internal components. Abnormally high temperatures are often a sign of reduced combustion efficiency and increased heat loss. By monitoring the temperature threshold, the system can proactively adjust the ignition strategy, optimize the combustion process, and avoid excessive heat loss, thereby improving the engine's overall thermal efficiency and enhancing the vehicle's fuel economy and power performance.

[0094] In one embodiment of the present application, while taking pressure and temperature into consideration at the same time, the second processing unit includes: an eighth processing module for determining that the above-mentioned judgment result indicates that the above-mentioned target fault has occurred in the above-mentioned methanol engine when the above-mentioned current pressure is greater than or equal to the pressure threshold and the above-mentioned current temperature is greater than or equal to the temperature threshold; and a ninth processing module for determining that the above-mentioned judgment result indicates that the above-mentioned target fault has not occurred in the above-mentioned methanol engine when the above-mentioned current pressure is less than the above-mentioned pressure threshold and / or the above-mentioned current temperature is less than the above-mentioned temperature threshold.

[0095] Combining current pressure with a pressure threshold and current temperature with a temperature threshold, and using AND logic to determine if pre-ignition or knock has occurred, significantly improves fault diagnosis accuracy. This is because abnormal combustion is often accompanied by abnormal increases in both pressure and temperature. This dual confirmation mechanism reduces false positives and missed alarms that can result from single-parameter judgment, ensuring precise fault identification. This strategy allows the system to monitor the engine's combustion state (via pressure and temperature) in real time and respond immediately when an anomaly is detected. This immediate response is crucial for suppressing pre-ignition and knock, as it allows for rapid adjustment of the ignition strategy to prevent serious damage to the engine caused by abnormal combustion. Through comprehensive analysis of pressure and temperature, the system intelligently distinguishes between normal pressure and temperature fluctuations caused by varying workloads and true abnormal combustion events. This intelligent distinction helps the system adopt the most appropriate control strategy for different operating conditions (such as starting, acceleration, deceleration, or steady driving), ensuring both engine efficiency and safety. Fault diagnosis based on pressure and temperature thresholds enables the system to precisely adjust the ignition strategy, for example, using multiple spark plugs for ignition at high pressure and temperature, while using fewer spark plugs at normal or lower combustion pressures and temperatures. This not only suppresses abnormal combustion, but also optimizes fuel consumption and improves the overall efficiency of the engine while ensuring stable engine operation.

[0096] The methanol engine ignition device includes a processor and a memory. The acquisition unit, first determination unit, and second determination unit are stored in the memory as program units. The processor executes the program units stored in the memory to implement the corresponding functions. The modules are all located in the same processor; alternatively, the modules can be located in different processors in any combination.

[0097] The processor includes a core, which retrieves the corresponding program unit from the memory. One or more cores can be configured, and by adjusting the core parameters, the problem of existing solutions being unable to suppress pre-ignition and knock during the ignition period of methanol engines is addressed.

[0098] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0099] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program. When the program is run, the device where the computer-readable storage medium is located is controlled to execute the ignition method of the methanol engine.

[0100] An embodiment of the present invention provides a processor, which is used to run a program, wherein the program executes the ignition method of the methanol engine when it is run.

[0101] An embodiment of the present invention provides a device comprising a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, at least the following steps are implemented: obtaining the pressure and / or temperature within the cylinder at the current moment to obtain the current pressure and / or current temperature; determining a judgment result based on the current pressure and / or current temperature, wherein the judgment result indicates whether a target fault has occurred in the methanol engine, wherein the target fault includes at least one of the following: pre-ignition or knock; determining whether to modify the initial ignition mode based on the judgment result to determine a final ignition mode, and igniting using the final ignition mode, wherein the initial ignition mode indicates ignition using the three auxiliary spark plugs, and the final ignition mode is one of the following: ignition using the three auxiliary spark plugs, ignition using the main spark plug and the three auxiliary spark plugs, or ignition using the main spark plug. The device herein may be a server, a PC, a PAD, a mobile phone, or the like.

[0102] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialized program having at least the following method steps: obtaining the pressure and / or temperature in the cylinder of the above-mentioned cylinder at the current moment to obtain the current pressure and / or current temperature; determining a judgment result based on the above-mentioned current pressure and / or the above-mentioned current temperature, the above-mentioned judgment result characterizing whether a target fault occurs in the above-mentioned methanol engine, the above-mentioned target fault includes at least one of the following: pre-ignition, detonation; determining whether to modify the initial ignition mode based on the above-mentioned judgment result to determine the final ignition mode, and using the above-mentioned final ignition mode for ignition, the above-mentioned initial ignition mode characterizing the use of the above-mentioned three auxiliary spark plugs for ignition, the above-mentioned final ignition mode being one of the following: using the above-mentioned three auxiliary spark plugs for ignition, using the above-mentioned main spark plug and the above-mentioned three auxiliary spark plugs for ignition, and using the above-mentioned main spark plug for ignition.

[0103] The present application also provides a methanol engine system, which includes: a controller, a main spark plug and three auxiliary spark plugs, the main spark plug is installed to the top center position of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug. The controller is used to execute any one of the above methods. By analyzing the pressure and temperature at the current moment, it is determined whether pre-ignition or detonation has occurred. According to the fault judgment result, the ignition mode can be intelligently adjusted. If potential pre-ignition or detonation is detected, the system will adjust the initial ignition mode (ignition using only auxiliary spark plugs) to an ignition mode using more spark plugs, such as using the main spark plug and all auxiliary spark plugs at the same time, or only using the main spark plug for ignition, so as to reduce instability in the combustion process and suppress the occurrence of abnormal combustion. Once the final ignition mode is determined, the system will execute ignition according to this mode, thereby effectively controlling pre-ignition, detonation and other faults without sacrificing engine performance, avoiding the overly conservative ignition strategy in traditional methods, enabling methanol engines to achieve higher thermal efficiency and power performance under high load conditions, reducing mechanical stress inside the engine, and extending the service life of the engine, thereby solving the problem that existing solutions are difficult to suppress pre-ignition and detonation in methanol engines during ignition.

[0104] Obviously, those skilled in the art will appreciate that the various modules or steps of the present invention described above can be implemented using a general-purpose computing device, can be centralized on a single computing device, or can be distributed across a network of multiple computing devices. They can be implemented using program code executable by the computing device, and thus, can be stored in a storage device and executed by the computing device. In some cases, the steps shown or described herein can be performed in a different order than that shown, or can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0105] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0106] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0107] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0108] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0109] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0110] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0111] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can be implemented using any method or technology for information storage. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change RAM (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

[0112] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0113] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0114] 1) The ignition method of the methanol engine of the present application determines whether pre-ignition or knock has occurred by analyzing the pressure and temperature at the current moment. According to the fault judgment result, the ignition mode can be intelligently adjusted. If potential pre-ignition or knock is detected, the system will adjust the initial ignition mode (ignition using only auxiliary spark plugs) to an ignition mode using more spark plugs, such as using the main spark plug and all auxiliary spark plugs at the same time, or only using the main spark plug for ignition, so as to reduce instability in the combustion process and suppress the occurrence of abnormal combustion. Once the final ignition mode is determined, the system will execute ignition according to this mode, thereby effectively controlling pre-ignition, knock and other faults without sacrificing engine performance, avoiding the overly conservative ignition strategy in traditional methods, enabling the methanol engine to achieve higher thermal efficiency and power performance under high load conditions, reducing the mechanical stress inside the engine, and extending the service life of the engine, thereby solving the problem that the existing scheme is difficult to suppress pre-ignition and knock phenomena in the methanol engine during the ignition period.

[0115] 2) The ignition device of the methanol engine of the present application determines whether pre-ignition or knock has occurred by analyzing the pressure and temperature at the current moment. According to the fault judgment result, the ignition mode can be intelligently adjusted. If potential pre-ignition or knock is detected, the system will adjust the initial ignition mode (ignition using only auxiliary spark plugs) to an ignition mode using more spark plugs, such as using the main spark plug and all auxiliary spark plugs at the same time, or only using the main spark plug for ignition, so as to reduce instability in the combustion process and suppress the occurrence of abnormal combustion. Once the final ignition mode is determined, the system will execute ignition according to this mode, thereby effectively controlling pre-ignition, knock and other faults without sacrificing engine performance, avoiding the overly conservative ignition strategy in traditional methods, enabling the methanol engine to achieve higher thermal efficiency and power performance under high load conditions, reducing the mechanical stress inside the engine, and extending the service life of the engine, thereby solving the problem that the existing solution is difficult to suppress pre-ignition and knock phenomena in the methanol engine during the ignition period.

[0116] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A methanol engine ignition method, applied to a controller in a methanol engine system, wherein the methanol engine system further comprises a main spark plug and three auxiliary spark plugs, wherein the main spark plug is mounted at the top center of a cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug, characterized in that: include: Obtaining the pressure and / or temperature in the cylinder at the current moment to obtain the current pressure and / or current temperature; Determining a judgment result according to the current pressure and / or the current temperature, wherein the judgment result indicates whether a target fault occurs in the methanol engine, wherein the target fault includes at least one of the following: pre-ignition and knock; Based on the judgment result, it is determined whether to modify the initial ignition mode to determine the final ignition mode, and ignition is performed using the final ignition mode. The initial ignition mode is characterized by ignition using the three auxiliary spark plugs, and the final ignition mode is one of the following: ignition using the three auxiliary spark plugs, ignition using the main spark plug and the three auxiliary spark plugs, and ignition using the main spark plug.

2. The method according to claim 1, characterized in that Determining whether to modify the initial ignition mode based on the judgment result to determine the final ignition mode includes: If the judgment result indicates that the target fault occurs in the methanol engine, the initial ignition mode is modified to be ignited by the main spark plug and the three auxiliary spark plugs, so as to determine that the final ignition mode is ignited by the main spark plug and the three auxiliary spark plugs; If the judgment result indicates that the methanol engine does not have the target fault, the initial ignition mode is modified to ignite using the main spark plug to obtain a current ignition mode, and the judgment result is re-determined; According to the re-determined judgment result, it is determined whether to modify the current ignition mode to determine the final ignition mode.

3. The method according to claim 2, characterized in that Determining whether to modify the current ignition mode according to the re-determined judgment result to determine the final ignition mode includes: If the re-determined judgment result indicates that the target fault has not occurred in the methanol engine, determining that there is no need to modify the current ignition mode, so as to determine that the final ignition mode is the current ignition mode; When the re-determined judgment result indicates that the target fault occurs in the methanol engine, the current ignition mode is modified to ignite using the three auxiliary spark plugs, so as to determine that the final ignition mode is ignited using the three auxiliary spark plugs.

4. The method according to claim 1, wherein After determining the final ignition mode, the method further includes: Determine the number of occurrences of the target fault within a preset time period and obtain the current number of occurrences; The ignition frequency and / or ignition time of the methanol engine are adjusted according to the current occurrence frequency.

5. The method according to claim 1, wherein Determining a judgment result based on the current pressure, wherein the judgment result indicates whether a target fault occurs in the methanol engine, including: When the current pressure is greater than or equal to a pressure threshold, determining that the judgment result indicates that the target fault occurs in the methanol engine; When the current pressure is less than the pressure threshold, it is determined that the judgment result indicates that the target fault has not occurred in the methanol engine.

6. The method according to claim 1, characterized in that Determining a judgment result according to the current temperature includes: When the current temperature is greater than or equal to a temperature threshold, determining that the judgment result indicates that the target fault occurs in the methanol engine; When the current temperature is less than the temperature threshold, it is determined that the judgment result indicates that the target fault has not occurred in the methanol engine.

7. The method according to claim 1, characterized in that Determining a judgment result according to the current pressure and the current temperature includes: When the current pressure is greater than or equal to a pressure threshold, and the current temperature is greater than or equal to a temperature threshold, determining that the judgment result indicates that the target fault occurs in the methanol engine; When the current pressure is less than the pressure threshold, and / or the current temperature is less than the temperature threshold, it is determined that the judgment result indicates that the target fault has not occurred in the methanol engine.

8. An ignition device for a methanol engine, characterized in that: include: an acquiring unit, configured to acquire the pressure and / or temperature inside the cylinder at a current moment, and obtain the current pressure and / or current temperature; a first determining unit, configured to determine a judgment result based on the current pressure and / or the current temperature, wherein the judgment result indicates whether a target fault occurs in the methanol engine, the target fault including at least one of the following: pre-ignition and knock; The second determination unit is used to determine whether to modify the initial ignition mode based on the judgment result to determine the final ignition mode, and adopt the final ignition mode for ignition, wherein the initial ignition mode is characterized by adopting three auxiliary spark plugs for ignition, and the final ignition mode is one of the following: adopting the three auxiliary spark plugs for ignition, adopting the main spark plug and the three auxiliary spark plugs for ignition, and adopting the main spark plug for ignition, the main spark plug is installed to the top center position of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method according to any one of claims 1 to 7.

10. A methanol engine system, characterized in that: include: A controller, a main spark plug and three auxiliary spark plugs, wherein the main spark plug is mounted to the top center of the cylinder of the methanol engine, and the three auxiliary spark plugs are arranged around the main spark plug, and the controller is used to execute the method described in any one of claims 1 to 7.

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