A misfire treatment method and system for an openable and closable active pre-combustion chamber engine

Abstract

The present invention provides a misfire treatment method and system for an openable and closable active pre-combustion chamber engine, the method comprising: obtaining an ignition temperature threshold, obtaining a first air-fuel ratio and a second air-fuel ratio based on basic parameters of the engine; obtaining the real-time air-fuel ratio and instantaneous angular velocity of the engine, and judging whether a misfire occurs based on the real-time air-fuel ratio and instantaneous angular velocity of the crankshaft; if it occurs, it is judged as a pre-combustion chamber misfire or a main combustion chamber misfire; if it is a pre-combustion chamber misfire, the pre-combustion chamber pin is continuously opened, and fuel injection is stopped to obtain a first real-time air-fuel ratio, and then judge whether the misfire treatment is completed; if it is a main combustion chamber misfire, the fuel injection pulse width is increased, and a second real-time air-fuel ratio is obtained, and then judge whether the misfire treatment is completed. Through the above-mentioned method, corresponding response measures are taken for different misfire phenomena, so that rapid recovery after misfire is achieved, the impact on subsequent cycles is reduced, and the safety hazards caused by misfire phenomena are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engine detection, and in particular to a misfire processing method and system for an openable and closable active pre-combustion chamber engine. Background Art

[0002] With the increasing requirements for environmental protection and energy efficiency, internal combustion engine technology continues to develop to meet more stringent emission standards and higher fuel economy requirements. As a new type of internal combustion engine technology, the active pre-combustion chamber engine has gradually attracted widespread attention due to its efficient combustion control ability and low emission characteristics during the combustion process.

[0003] The active pre-chamber engine ignites a small amount of fuel in the pre-chamber and uses the high-temperature and high-pressure flame generated by the initial combustion to spray into the main combustion chamber, thereby causing the mixture in the main combustion chamber to burn quickly and evenly.

[0004] However, this ignition method usually faces the problem of misfire, which means that the combustion process in one or more cylinders of the engine fails to complete normally or fails to proceed as expected. This is usually caused by ignition failure, abnormal fuel supply, or too lean or too rich mixture. Compared with traditional internal combustion engines, the pre-combustion chamber space of the pre-combustion chamber engine is relatively small, and the gas in the pre-combustion chamber cannot be fully discharged during the exhaust stroke. Once a misfire occurs, the mixture in the pre-combustion chamber may be further enriched due to the continued accumulation of fuel in the subsequent combustion cycle, resulting in safety hazards. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a misfire handling method and system for an openable and closable active pre-combustion chamber engine, aiming to solve the technical problem that if a misfire occurs in an openable and closable active pre-combustion chamber engine in the prior art, in the subsequent combustion cycle, the mixed gas in the pre-combustion chamber may be further enriched due to the continued accumulation of fuel, resulting in a safety hazard.

[0006] In order to achieve the above objectives, in a first aspect, an embodiment of the present application provides a method for handling misfire of an openable and closable active pre-combustion chamber engine, comprising the following steps:

[0007] Acquire an ignition temperature threshold of an openable and closable active pre-combustion chamber engine, and acquire a first air-fuel ratio and a second air-fuel ratio based on basic parameters of the openable and closable active pre-combustion chamber engine;

[0008] Continuously acquiring the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft of the openable and closable active pre-combustion chamber engine, and judging whether a misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft;

[0009] If a misfire occurs inside the openable and closable active pre-combustion chamber engine, it is determined that the misfire is a pre-combustion chamber misfire or a main combustion chamber misfire;

[0010] If the misfire phenomenon is a misfire in the pre-combustion chamber, the pre-combustion chamber pintle is continuously opened, fuel injection is stopped, and a first real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine is obtained, and whether the misfire processing is completed is determined based on the first real-time air-fuel ratio;

[0011] If the misfire phenomenon is a misfire in the main combustion chamber, the injection pulse width is increased, and a second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine is obtained, and it is determined whether the misfire processing is completed based on the second real-time air-fuel ratio.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by continuously acquiring the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft, the automatic judgment of the internal misfire phenomenon of the openable and closable active pre-combustion chamber engine is realized; further, after determining that the misfire phenomenon has occurred, the specific occurrence location of the misfire phenomenon can be automatically identified, and the corresponding misfire control can be automatically completed, and corresponding response measures can be taken for different misfire phenomena, thereby realizing rapid recovery after the misfire, reducing the impact on subsequent cycles, and avoiding the safety hazards caused by the misfire phenomenon; at the same time, through fully automated identification and control, the automatic control of the stable operation of the openable and closable active pre-combustion chamber engine is completed, and the operating efficiency of the openable and closable active pre-combustion chamber engine is improved; by reducing the occurrence of misfire phenomena, the loss of the openable and closable active pre-combustion chamber engine is reduced, the maintenance cost is saved, and its service life is extended.

[0013] Furthermore, the step of obtaining the ignition temperature threshold of the openable and closable active pre-combustion chamber engine includes:

[0014] When the openable and closable active pre-combustion chamber engine is placed on the engine stand and runs smoothly, the real-time ignition temperature is continuously obtained. When a misfire occurs in the pre-combustion chamber, the real-time ignition temperature at the time of the misfire is determined as the misfire temperature;

[0015] An ignition temperature threshold is determined by a plurality of the misfire temperatures.

[0016] Furthermore, the basic parameters include single-cycle air volume, pre-combustion chamber volume, main combustion chamber volume, and single-cycle pre-combustion chamber combustion injection volume.

[0017] Furthermore, the first air-fuel ratio is obtained by:

[0018] ,

[0019] in, represents the first air-fuel ratio, represents the correction factor, Indicates the single cycle air volume, It represents the theoretical air-fuel ratio of fuel. represents the volume of the pre-combustion chamber, represents the volume of the main combustion chamber, Indicates the single-cycle pre-chamber combustion injection amount.

[0020] Furthermore, the step of judging whether misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft includes:

[0021] Comparing whether a jump phenomenon occurs between the real-time air-fuel ratios at adjacent time points, and comparing whether a first sudden drop phenomenon occurs between the instantaneous angular velocities of the crankshafts at adjacent time points;

[0022] If a jump phenomenon occurs between the real-time air-fuel ratios at adjacent time points and a first sudden drop phenomenon occurs between the instantaneous angular velocities of the crankshafts at adjacent time points, it is determined that a misfire occurs inside the openable and closable active pre-chamber engine.

[0023] Furthermore, the step of determining whether the misfire phenomenon is a pre-combustion chamber misfire or a main combustion chamber misfire includes:

[0024] Continuously detecting the internal temperature of the openable and closable active pre-combustion chamber engine, and comparing whether a second sudden drop phenomenon occurs between the internal temperatures at adjacent time points;

[0025] If no second sudden drop occurs between the internal temperatures at adjacent time points, it is determined that the misfire phenomenon is a misfire in the main combustion chamber;

[0026] If a second sudden drop occurs between the internal temperatures at adjacent time points, comparing the real-time internal temperature with the ignition temperature threshold;

[0027] If the real-time internal temperature is higher than the ignition temperature threshold, it is determined that the misfire phenomenon is a main combustion chamber misfire;

[0028] If the real-time internal temperature is lower than the ignition temperature threshold, the misfire phenomenon is determined to be a pre-combustion chamber misfire.

[0029] Furthermore, the step of determining whether the misfire processing is completed based on the first real-time air-fuel ratio includes:

[0030] comparing the first real-time air-fuel ratio with the first air-fuel ratio;

[0031] If the first real-time air-fuel ratio is higher than the first air-fuel ratio, it is determined that the misfire process is completed.

[0032] Furthermore, the step of determining whether the misfire processing is completed based on the second real-time air-fuel ratio includes:

[0033] comparing the second real-time air-fuel ratio with the second air-fuel ratio;

[0034] If the second real-time air-fuel ratio is lower than the second air-fuel ratio, it is determined that the misfire process is completed.

[0035] Furthermore, after the step of increasing the injection pulse width if the misfire phenomenon is a misfire in the main combustion chamber, obtaining a second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine, and determining whether the misfire processing is completed based on the second real-time air-fuel ratio, the method further includes:

[0036] The injection map of the openable and closable active pre-combustion chamber engine is adjusted based on the increased injection pulse width.

[0037] In a second aspect, an embodiment of the present application provides a misfire treatment system for an openable and closable active pre-combustion chamber engine, which is applied to the misfire treatment method for an openable and closable active pre-combustion chamber engine as described in the first aspect above, and the system comprises:

[0038] A calibration module, used to obtain an ignition temperature threshold of an openable and closable active pre-combustion chamber engine, and to obtain a first air-fuel ratio and a second air-fuel ratio based on basic parameters of the openable and closable active pre-combustion chamber engine;

[0039] A first judgment module is used to continuously obtain the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft of the openable and closable active pre-combustion chamber engine, and judge whether a misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft;

[0040] A second judgment module is used to judge whether a misfire occurs in the pre-combustion chamber or a main combustion chamber if a misfire occurs inside the openable and closable active pre-combustion chamber engine;

[0041] a first execution module, configured to, if the misfire phenomenon is a misfire in the pre-combustion chamber, continuously open the pre-combustion chamber pintle, stop fuel injection, and obtain a first real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine, and determine whether the misfire processing is completed based on the first real-time air-fuel ratio;

[0042] The second execution module is used to increase the injection pulse width and obtain the second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine if the misfire phenomenon is a misfire in the main combustion chamber, and determine whether the misfire processing is completed based on the second real-time air-fuel ratio.

[0043] In a third aspect, an embodiment of the present application provides a computer, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the misfire handling method for an openable and closable active pre-combustion chamber engine as described in the first aspect above is implemented.

[0044] In a fourth aspect, an embodiment of the present application provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the misfire handling method for an openable and closable active pre-combustion chamber engine as described in the first aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a flow chart of a misfire treatment method of an openable and closable active pre-combustion chamber engine in the first embodiment of the present invention;

[0046] Figure 2 It is a schematic cross-sectional structure diagram of an openable and closable active pre-combustion chamber engine in a misfire treatment method of an openable and closable active pre-combustion chamber engine in a first embodiment of the present invention;

[0047] Figure 3 It is a structural block diagram of a misfire handling system of an openable and closable active pre-combustion chamber engine in a second embodiment of the present invention;

[0048] Description of main component symbols:

[0049] 1. Pre-combustion injector; 2. Spark plug; 4. Exhaust duct; 5. Pre-combustion chamber spray hole; 6. Piston; 7. Pre-combustion chamber; 8. Intake duct; 9. Intake injector; 11. Main combustion chamber; 12. Pre-combustion chamber pin; 13. Solenoid valve; 14. Thermocouple.

[0050] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0052] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0054] See also Figure 1 and Figure 2 The misfire treatment method of an openable and closable active pre-combustion chamber engine provided in the first embodiment of the present invention is applied to an openable and closable active pre-combustion chamber engine, wherein the openable and closable active pre-combustion chamber engine comprises an engine body, a main combustion chamber 11 is arranged in the engine body, a piston 6 is movably connected to the bottom of the main combustion chamber 11, a pre-combustion chamber 7 is arranged on the top of the engine body, the pre-combustion chamber 7 is connected to the main combustion chamber 11 through a pre-combustion chamber spray hole 5, an intake passage 8 and an exhaust passage 4 connected to the main combustion chamber 11 are respectively arranged on opposite sides of the engine body, an intake injector 9 connected to the intake passage 8 is arranged on the engine body, a pre-combustion injector 1 and a spark plug 2 connected to the pre-combustion chamber 7 are arranged on the engine body, and the pre-combustion injector 1 and the spark plug 2 are located at On the opposite sides of the precombustion chamber 7, a solenoid valve 13 is arranged on the top of the machine body, and the solenoid valve 13 corresponds to the position of the precombustion chamber 7. The solenoid valve 13 is movably connected to the precombustion chamber pin 12, and one end of the precombustion chamber pin 12 passes through the solenoid valve 13 and is placed in the precombustion chamber 7. A thermocouple 14 is arranged in the precombustion chamber pin 12. It should be noted that a central channel is opened on the precombustion chamber pin 12, and the central channel extends from the top of the precombustion chamber pin 12 to the bottom of the precombustion chamber pin 12 and passes through the precombustion chamber pin 12. The thermocouple 14 is arranged through the central hole, and the measuring point of the thermocouple 14 is located at the end of the precombustion chamber pin 12 facing the precombustion chamber 7. Most of the fuel is injected in the intake duct 8 and enters the main combustion chamber 11 for mixture, and a small part of the fuel is burned and injected in the pre-combustion chamber 7. After a certain amount of fuel is injected in the pre-combustion chamber 7, it is ignited by the spark plug 2, and combustion is first formed in the pre-combustion chamber 7. The flame enters the main combustion chamber 11 from the pre-combustion chamber spray hole 5 to ignite the mixture. At the same time, the solenoid valve 13 is in a closed state, so that it is close to the outer wall of the pre-combustion chamber pin 12 to close the pre-combustion chamber 7. When the pre-combustion chamber 7 needs to be opened, the solenoid valve 13 is opened, and the pre-combustion chamber pin 12 moves axially upward.

[0055] The misfire treatment method of the openable and closable active pre-combustion chamber engine comprises the following steps:

[0056] S10: Acquire an ignition temperature threshold of an openable and closable active pre-combustion chamber engine, and acquire a first air-fuel ratio and a second air-fuel ratio based on basic parameters of the openable and closable active pre-combustion chamber engine;

[0057] The basic parameters include single-cycle air volume, pre-combustion chamber volume, main combustion chamber volume, and single-cycle pre-combustion chamber combustion injection volume.

[0058] The formula for obtaining the first air-fuel ratio is:

[0059] ,

[0060] in, represents the first air-fuel ratio, represents the correction factor, Indicates the single cycle air volume, It represents the theoretical air-fuel ratio of fuel. represents the volume of the pre-combustion chamber, represents the volume of the main combustion chamber, Indicates the single-cycle pre-chamber combustion injection amount.

[0061] The formula for obtaining the second air-fuel ratio is:

[0062] ,

[0063] in, Indicates the second air-fuel ratio.

[0064] The step S10 comprises:

[0065] S110: When the openable and closable active pre-combustion chamber engine is placed on an engine stand and is running smoothly, the real-time ignition temperature is continuously obtained, and when a misfire occurs in the pre-combustion chamber, the real-time ignition temperature at the time of the misfire is determined as the misfire temperature;

[0066] S120: determining an ignition temperature threshold value according to a plurality of misfire temperatures;

[0067] In this embodiment, the ignition temperature threshold is obtained by averaging a plurality of misfire temperatures.

[0068] S20: continuously acquiring the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft of the openable and closable active pre-combustion chamber engine, and judging whether a misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft;

[0069] The real-time air-fuel ratio is obtained by an oxygen sensor disposed in the engine body, and the oxygen sensor measures the oxygen content in the exhaust gas, thereby calculating the real-time air-fuel ratio. The instantaneous angular velocity of the crankshaft is acquired by a rotation speed sensor disposed in the engine body.

[0070] The step S20 comprises:

[0071] S210: comparing whether a jump phenomenon occurs between the real-time air-fuel ratios at adjacent time points, and comparing whether a first sudden drop phenomenon occurs between the instantaneous angular velocities of the crankshafts at adjacent time points;

[0072] S220: If a jump occurs between the real-time air-fuel ratios at adjacent time points and a first sudden drop occurs between the instantaneous angular velocities of the crankshafts at adjacent time points, it is determined that a misfire occurs inside the openable and closable active pre-combustion chamber engine;

[0073] Since combustion does not occur when misfire occurs, oxygen in the mixture is not consumed, so when misfire occurs, the real-time air-fuel ratio will jump, and when misfire occurs, power will be interrupted, and the instantaneous angular velocity of the crankshaft will decrease momentarily. Based on this principle, whether misfire occurs is determined. After misfire occurs, the specific location of the misfire needs to be further determined.

[0074] S30: If a misfire occurs inside the openable and closable active pre-combustion chamber engine, determining that the misfire is a pre-combustion chamber misfire or a main combustion chamber misfire;

[0075] The step S30 comprises:

[0076] S310: Continuously detecting the internal temperature of the openable and closable active pre-combustion chamber engine, and comparing whether a second sudden drop occurs between the internal temperatures at adjacent time points;

[0077] S320: If no second sudden drop occurs between the internal temperatures at adjacent time points, determining that the misfire phenomenon is a misfire in the main combustion chamber;

[0078] S330: If a second sudden drop occurs between the internal temperatures at adjacent time points, comparing the real-time internal temperature with the ignition temperature threshold;

[0079] S340: If the real-time internal temperature is higher than the ignition temperature threshold, determining that the misfire phenomenon is a main combustion chamber misfire;

[0080] S350: If the real-time internal temperature is lower than the ignition temperature threshold, determining that the misfire phenomenon is a pre-combustion chamber misfire;

[0081] S340: If the initial total score value is in the high score segment, the initial total score value is adjusted down by the final adjustment ratio to obtain the final total score value; if the initial total score value is in the low score segment, the initial total score value is adjusted up by the final adjustment ratio to obtain the final total score value; if the initial total score value is in the medium score segment, the initial total score value is determined as the final total score value.

[0082] By considering the reputation score corresponding to the user ID and optimizing the initial total score based on the reputation score, the deviation between the monthly score value and the actual situation caused by malicious evaluation can be avoided to a certain extent, thereby improving the accuracy of subsequent profit forecasts.

[0083] S40: If the misfire phenomenon is a misfire in the pre-combustion chamber, the pre-combustion chamber pin is continuously opened, fuel injection is stopped, and a first real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine is obtained, and whether the misfire processing is completed is determined based on the first real-time air-fuel ratio;

[0084] Specifically, the step S40 includes:

[0085] S410: comparing the first real-time air-fuel ratio with the first air-fuel ratio;

[0086] S420: If the first real-time air-fuel ratio is higher than the first air-fuel ratio, it is determined that the misfire process is completed;

[0087] S50: If the misfire phenomenon is a misfire in the main combustion chamber, increase the injection pulse width, obtain a second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine, and determine whether the misfire processing is completed based on the second real-time air-fuel ratio;

[0088] It can be understood that the intake injector is controlled to increase the injection pulse width.

[0089] The step S50 comprises:

[0090] S510: Compare the second real-time air-fuel ratio with the second air-fuel ratio

[0091] S520: If the second real-time air-fuel ratio is lower than the second air-fuel ratio, it is determined that the misfire process is completed.

[0092] It should be noted that both step S40 and step S50 are completed within a current ignition cycle. If step S40 or step S50 still cannot meet the threshold requirement within the first preset number of cycles, the openable and closable active pre-combustion chamber engine is shut down and a supply system fault warning is sent. In this embodiment, the first preset number of cycles is 10 times.

[0093] Furthermore, after completing step S40 or step S50, return to step S10 and perform a new round of ignition cycle. If the situation of step S30 to step S50 still exists within the second preset number of cycles, the openable and closable active pre-combustion chamber engine is shut down and an ignition system fault warning is sent. In this embodiment, the second preset number of cycles is 10 times.

[0094] Preferably, the method further comprises:

[0095] S60: adjusting the injection map of the openable and closable active pre-combustion chamber engine based on the increased injection pulse width;

[0096] For the engine, the fuel injection map is the basis of the engine control injection strategy. For the openable and closeable active pre-combustion chamber engine, the fuel injection in the pre-combustion chamber directly affects the working stability of the engine. Therefore, the data collected during the misfire treatment process can be used to adjust the fuel injection ratio in the pre-combustion chamber and the main combustion chamber, realize the calibration of the engine map, and improve the stability of subsequent operation.

[0097] By continuously acquiring the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft, the automatic determination of the internal misfire phenomenon of the openable and closable active pre-combustion chamber engine is achieved; further, after determining that a misfire phenomenon has occurred, the specific location of the misfire phenomenon can be automatically identified, and the corresponding misfire control can be automatically completed, and corresponding response measures can be taken for different misfire phenomena, thereby achieving rapid recovery after a misfire, reducing the impact on subsequent cycles, and avoiding safety hazards caused by misfire phenomena; at the same time, through fully automated identification and control, automatic control of the stable operation of the openable and closable active pre-combustion chamber engine is completed, thereby improving the operating efficiency of the openable and closable active pre-combustion chamber engine; by reducing the occurrence of misfire phenomena, the loss of the openable and closable active pre-combustion chamber engine is reduced, saving maintenance costs and extending its service life.

[0098] See also Figure 3 The second embodiment of the present invention provides a misfire handling system for an openable and closable active pre-combustion chamber engine, which is applied to the misfire handling method for an openable and closable active pre-combustion chamber engine described in the above embodiment, and will not be repeated hereafter. As used below, the terms "module", "unit", "sub-unit", etc. may be a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

[0099] The system comprises:

[0100] The calibration module 10 is used to obtain the ignition temperature threshold of the openable and closable active pre-combustion chamber engine, and obtain the first air-fuel ratio and the second air-fuel ratio based on the basic parameters of the openable and closable active pre-combustion chamber engine;

[0101] The calibration module 10 comprises:

[0102] The first unit is used for continuously acquiring the real-time ignition temperature when the openable and closable active pre-combustion chamber engine is placed on the engine stand and is running smoothly, and when a misfire occurs in the pre-combustion chamber, determining the real-time ignition temperature at the time of the misfire as the misfire temperature;

[0103] A second unit is used to determine an ignition temperature threshold value according to a plurality of said misfire temperatures;

[0104] A first judgment module 20 is used to continuously obtain the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft of the openable and closable active pre-combustion chamber engine, and judge whether a misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft;

[0105] The first determination module 20 includes:

[0106] The third unit is used to compare whether a jump phenomenon occurs between the real-time air-fuel ratios at adjacent time points, and to compare whether a first sudden drop phenomenon occurs between the instantaneous angular velocities of the crankshafts at adjacent time points;

[0107] A fourth unit is used to determine that a misfire occurs inside the openable and closable active pre-combustion chamber engine if a jump occurs between the real-time air-fuel ratios at adjacent time points and a first sudden drop occurs between the instantaneous angular velocities of the crankshafts at adjacent time points;

[0108] The second judgment module 30 is used to judge whether the misfire phenomenon is a pre-combustion chamber misfire or a main combustion chamber misfire if a misfire phenomenon occurs inside the openable and closable active pre-combustion chamber engine;

[0109] The second determination module 30 includes:

[0110] A fifth unit is used to continuously detect the internal temperature of the openable and closable active pre-combustion chamber engine, and compare whether a second sudden drop phenomenon occurs between the internal temperatures at adjacent time points;

[0111] A sixth unit, configured to determine that the misfire phenomenon is a misfire in the main combustion chamber if no second sudden drop phenomenon occurs between the internal temperatures at adjacent time points;

[0112] A seventh unit is used for comparing the real-time internal temperature with the ignition temperature threshold if a second sudden drop phenomenon occurs between the internal temperatures at adjacent time points;

[0113] An eighth unit, configured to determine that the misfire phenomenon is a misfire in the main combustion chamber if the real-time internal temperature is higher than the ignition temperature threshold;

[0114] a ninth unit, configured to determine that the misfire phenomenon is a pre-combustion chamber misfire if the real-time internal temperature is lower than the ignition temperature threshold;

[0115] The first execution module 40 is used for, if the misfire phenomenon is a misfire in the pre-combustion chamber, continuously opening the pre-combustion chamber pintle, stopping fuel injection, and obtaining a first real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine, and determining whether the misfire processing is completed based on the first real-time air-fuel ratio;

[0116] The first execution module 40 includes:

[0117] a tenth unit, configured to compare the first real-time air-fuel ratio with a first air-fuel ratio;

[0118] an eleventh unit, configured to determine that a misfire process is completed if the first real-time air-fuel ratio is higher than the first air-fuel ratio;

[0119] The second execution module 50 is used to increase the injection pulse width if the misfire phenomenon is a misfire in the main combustion chamber, and obtain a second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine, and determine whether the misfire processing is completed based on the second real-time air-fuel ratio;

[0120] The second execution module 50 includes:

[0121] A twelfth unit, configured to compare the second real-time air-fuel ratio with a second air-fuel ratio;

[0122] A thirteenth unit, configured to determine that the misfire process is completed if the second real-time air-fuel ratio is lower than the second air-fuel ratio;

[0123] Preferably, the system further comprises:

[0124] The recording module 60 is used to adjust the injection map of the openable and closable active pre-combustion chamber engine based on the increased injection pulse width.

[0125] The present invention also provides a computer, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the misfire handling method for an openable and closable active pre-combustion chamber engine as described in the above technical solution is implemented.

[0126] The present invention also provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the misfire handling method of the openable and closable active pre-combustion chamber engine as described in the above technical solution is implemented.

[0127] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0128] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for handling misfires in an openable and closable active pre-combustion chamber engine, characterized in that: The following steps are involved: Acquire an ignition temperature threshold of an openable and closable active pre-combustion chamber engine, and acquire a first air-fuel ratio and a second air-fuel ratio based on basic parameters of the openable and closable active pre-combustion chamber engine; Continuously acquiring the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft of the openable and closable active pre-combustion chamber engine, and judging whether a misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft; If a misfire occurs inside the openable and closable active pre-combustion chamber engine, it is determined that the misfire is a pre-combustion chamber misfire or a main combustion chamber misfire; If the misfire phenomenon is a misfire in the pre-combustion chamber, the pre-combustion chamber pintle is continuously opened, fuel injection is stopped, and a first real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine is obtained, and whether the misfire processing is completed is determined based on the first real-time air-fuel ratio; If the misfire phenomenon is a misfire in the main combustion chamber, the injection pulse width is increased, and a second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine is obtained, and it is determined whether the misfire processing is completed based on the second real-time air-fuel ratio.

2. The misfire treatment method of an openable and closable active pre-combustion chamber engine according to claim 1, characterized in that: The step of obtaining the ignition temperature threshold of the openable and closable active pre-combustion chamber engine comprises: When the openable and closable active pre-combustion chamber engine is placed on the engine stand and runs smoothly, the real-time ignition temperature is continuously obtained. When a misfire occurs in the pre-combustion chamber, the real-time ignition temperature at the time of the misfire is determined as the misfire temperature; An ignition temperature threshold is determined by a plurality of the misfire temperatures.

3. The misfire treatment method of an openable and closable active pre-combustion chamber engine according to claim 1, characterized in that: The basic parameters include single-cycle air volume, pre-combustion chamber volume, main combustion chamber volume, and single-cycle pre-combustion chamber combustion injection volume.

4. The misfire treatment method of an openable and closable active pre-combustion chamber engine according to claim 3, characterized in that: The formula for obtaining the first air-fuel ratio is: ， in, represents the first air-fuel ratio, represents the correction factor, Indicates the single cycle air volume, It represents the theoretical air-fuel ratio of fuel. represents the volume of the pre-combustion chamber, represents the volume of the main combustion chamber, Indicates the single-cycle pre-chamber combustion injection amount.

5. The misfire treatment method of an openable and closable active pre-combustion chamber engine according to claim 1, characterized in that: The step of judging whether misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft comprises: Comparing whether a jump phenomenon occurs between the real-time air-fuel ratios at adjacent time points, and comparing whether a first sudden drop phenomenon occurs between the instantaneous angular velocities of the crankshafts at adjacent time points; If a jump phenomenon occurs between the real-time air-fuel ratios at adjacent time points and a first sudden drop phenomenon occurs between the instantaneous angular velocities of the crankshafts at adjacent time points, it is determined that a misfire occurs inside the openable and closable active pre-chamber engine.

6. The misfire treatment method of an openable and closable active pre-combustion chamber engine according to claim 1, characterized in that: The step of determining whether the misfire phenomenon is a pre-combustion chamber misfire or a main combustion chamber misfire comprises: Continuously detecting the internal temperature of the openable and closable active pre-combustion chamber engine, and comparing whether a second sudden drop phenomenon occurs between the internal temperatures at adjacent time points; If no second sudden drop occurs between the internal temperatures at adjacent time points, it is determined that the misfire phenomenon is a misfire in the main combustion chamber; If a second sudden drop occurs between the internal temperatures at adjacent time points, comparing the real-time internal temperature with the ignition temperature threshold; If the real-time internal temperature is higher than the ignition temperature threshold, it is determined that the misfire phenomenon is a main combustion chamber misfire; If the real-time internal temperature is lower than the ignition temperature threshold, the misfire phenomenon is determined to be a pre-combustion chamber misfire.

7. The misfire treatment method of an openable and closable active pre-combustion chamber engine according to claim 1, characterized in that: The step of determining whether the misfire process is completed based on the first real-time air-fuel ratio comprises: comparing the first real-time air-fuel ratio with the first air-fuel ratio; If the first real-time air-fuel ratio is higher than the first air-fuel ratio, it is determined that the misfire process is completed.

8. The method for handling misfire of an openable and closable active pre-combustion chamber engine according to claim 1, characterized in that: The step of determining whether the misfire process is completed based on the second real-time air-fuel ratio comprises: comparing the second real-time air-fuel ratio with the second air-fuel ratio; If the second real-time air-fuel ratio is lower than the second air-fuel ratio, it is determined that the misfire process is completed.

9. The misfire treatment method of an openable and closable active pre-combustion chamber engine according to claim 1, characterized in that: After the step of increasing the injection pulse width if the misfire phenomenon is a misfire in the main combustion chamber, obtaining a second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine, and determining whether the misfire processing is completed based on the second real-time air-fuel ratio, the method further includes: The injection map of the openable and closable active pre-combustion chamber engine is adjusted based on the increased injection pulse width.

10. A misfire treatment system for an openable and closable active pre-combustion chamber engine, applied to the misfire treatment method for an openable and closable active pre-combustion chamber engine as claimed in any one of claims 1 to 9, characterized in that: The system comprises: A calibration module, used to obtain an ignition temperature threshold of an openable and closable active pre-combustion chamber engine, and to obtain a first air-fuel ratio and a second air-fuel ratio based on basic parameters of the openable and closable active pre-combustion chamber engine; A first judgment module is used to continuously obtain the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft of the openable and closable active pre-combustion chamber engine, and judge whether a misfire occurs inside the openable and closable active pre-combustion chamber engine based on the real-time air-fuel ratio and the instantaneous angular velocity of the crankshaft; A second judgment module is used to judge whether a misfire occurs in the pre-combustion chamber or a main combustion chamber if a misfire occurs inside the openable and closable active pre-combustion chamber engine; a first execution module, configured to, if the misfire phenomenon is a misfire in the pre-combustion chamber, continuously open the pre-combustion chamber pintle, stop fuel injection, and obtain a first real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine, and determine whether the misfire processing is completed based on the first real-time air-fuel ratio; The second execution module is used to increase the injection pulse width and obtain the second real-time air-fuel ratio inside the openable and closable active pre-combustion chamber engine if the misfire phenomenon is a misfire in the main combustion chamber, and determine whether the misfire processing is completed based on the second real-time air-fuel ratio.

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