A detonation protection method, device, equipment and computer-readable medium for a nitrogen-oxygen closed-loop gas engine

Abstract

The present application provides a knock protection method, device, equipment and computer-readable medium for a nitrogen-oxygen closed-loop gas engine, the method comprising: obtaining the actual emission value of the nitrogen-oxygen mixture at the exhaust tail pipe position, comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture, and obtaining a comparison result. If the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is delayed, and the closed-loop correction coefficient of the nitrogen-oxygen closed-loop gas engine is locked, thereby ensuring that the nitrogen-oxygen closed-loop processing will not be triggered while the ignition advance angle is delayed, that is, the air-fuel ratio will not be reduced to increase the concentration of the fuel gas, and the delay of the ignition advance angle will cause the combustion speed to slow down, thereby effectively suppressing knock, and the increase in the concentration of the fuel gas caused by the nitrogen-oxygen closed-loop processing will not eventually lead to an increase in the combustion speed, and finally avoid the conflict between the nitrogen-oxygen closed-loop processing and the suppression of knock.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a knock protection method, device, equipment and computer-readable medium for a nitrogen-oxygen closed-loop gas engine. Background Art

[0002] With the increasing demand for environmental protection, the current exhaust emissions of vehicles also need to meet new standards. Therefore, the gas engines currently used in vehicles usually use nitrogen oxide mixtures (NO x )Closed-loop technology route. NO x The closed-loop technology route refers to controlling the concentration of the fuel gas input into the gas generator to achieve the same actual emission value of the nitrogen and oxygen mixture in the exhaust tail pipe as the preset emission value.

[0003] But the NO x The closed-loop technology route conflicts with the gas engine knock control method. The gas engine knock control method is to reduce the ignition advance angle to reduce the combustion speed of the gas and thus suppress knock, but NO x In the closed-loop technology route, after reducing the ignition advance angle, the actual emission value in the exhaust gas emissions is also reduced. In order to keep the actual emission value the same as the preset emission value, the concentration of the fuel gas will be increased. However, the increase in the concentration of the fuel gas will accelerate the combustion rate, resulting in the current gas engine based on nitrogen oxide closed loop cannot effectively suppress knock. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a knock protection method, device, equipment and computer-readable medium for a nitrogen-oxygen closed-loop gas engine, which can avoid the conflict between nitrogen-oxygen closed-loop processing and knock suppression.

[0005] The present application provides a knock protection method for a nitrogen-oxygen closed-loop gas engine, the method comprising:

[0006] Obtaining the actual emission value of nitrogen and oxygen mixture at the exhaust tail pipe position;

[0007] Comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture to obtain a comparison result;

[0008] If the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is retarded and the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine is locked.

[0009] Optionally, the method further comprises:

[0010] If the comparison result is that the actual emission value is greater than the set emission value, the ignition advance angle is retarded and the air-fuel ratio is increased.

[0011] Optionally, before comparing the actual emission value with the set emission value of the nitrogen oxygen mixture, the method further includes:

[0012] Real-time detection of whether there is a knock signal;

[0013] If there is a knock signal, the actual emission value is compared with the set emission value of the nitrogen oxygen mixture.

[0014] Optionally, if there is a knock signal, comparing the actual emission value with the set emission value of the nitrogen oxygen mixture includes:

[0015] If there is a knock signal, it is determined that the knock signal is a slight knock signal, and then the actual emission value is compared with the set emission value of the nitrogen oxygen mixture.

[0016] Optionally, the method further comprises:

[0017] If it is determined that the knock signal is a severe knock signal, the operation of the nitrogen oxide closed-loop gas generator is directly stopped.

[0018] Optionally, the method further comprises:

[0019] When the air-fuel ratio is increased to reduce the actual emission value to less than the set emission value, the steps of delaying the ignition advance angle, locking the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine, and reducing the concentration of the fuel gas are continued until no knock signal is detected.

[0020] Optionally, the method further comprises:

[0021] If no knock signal is detected, it is determined whether the ignition advance angle is delayed, and if delayed, the ignition advance angle is restored to the set target value.

[0022] The present application provides a detonation protection device for a nitrogen-oxygen closed-loop gas engine, the device comprising:

[0023] An acquisition unit, used for acquiring an actual emission value of a nitrogen-oxygen mixture at an exhaust tail pipe position;

[0024] A comparison unit, used for comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture to obtain a comparison result;

[0025] The delay unit is used to delay the ignition advance angle and lock the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine if the comparison result is that the actual emission value is less than the set emission value.

[0026] The present application provides a knock protection device for a nitrogen-oxygen closed-loop gas engine, the device comprising: a processor and a memory;

[0027] The memory is used to store instructions;

[0028] The processor is used to execute the instructions in the memory to perform any of the methods described above.

[0029] The present application provides a computer-readable medium, characterized in that it includes instructions, which, when executed on a computer, enable the computer to execute the method described above.

[0030] The present application provides a knock protection method for a nitrogen-oxygen closed-loop gas engine, the method comprising: obtaining the actual emission value of the nitrogen-oxygen mixture at the exhaust tail pipe position, comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture, and obtaining a comparison result. If the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is delayed, and the closed-loop correction coefficient of the nitrogen-oxygen closed-loop gas engine is locked, thereby ensuring that the nitrogen-oxygen closed-loop processing will not be triggered while the ignition advance angle is delayed, that is, the air-fuel ratio will not be reduced to increase the concentration of the fuel gas, and the delay in the ignition advance angle will cause the combustion speed to slow down, thereby effectively suppressing knock, and the increase in the concentration of the fuel gas caused by the nitrogen-oxygen closed-loop processing will not eventually lead to an increase in the combustion speed, and finally avoid the conflict between the nitrogen-oxygen closed-loop processing and the suppression of knock. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other features, advantages and aspects of the embodiments of the present application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0032] Figure 1 It shows a NO x Schematic diagram of closed-loop technology route to adjust gas concentration;

[0033] Figure 2 A schematic flow chart of a knock protection method for a nitrogen-oxygen closed-loop gas engine provided in an embodiment of the present application is shown;

[0034] Figure 3 A schematic diagram of a knock protection process of a nitrogen-oxygen closed-loop gas engine provided in an embodiment of the present application is shown;

[0035] Figure 4 A schematic structural diagram of a knock protection device for a nitrogen-oxygen closed-loop gas engine provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0037] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0038] It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0039] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0040] The gas engines currently used in vehicles usually use a nitrogen-oxygen mixture (NO x )Closed-loop technology route. NO x The closed-loop technology route refers to controlling the concentration of the fuel gas input into the gas generator to achieve the same actual emission value of the nitrogen and oxygen mixture in the exhaust tail pipe as the preset emission value.

[0041] refer to Figure 1 As shown, it is a NO x Schematic diagram of the closed-loop technology route to adjust the concentration of the gas. When the actual emission value is different from the set emission value, the concentration of the gas is adjusted to achieve the same actual emission value of the nitrogen and oxygen mixture in the exhaust tail pipe as the preset emission value.

[0042] But the NO x The closed-loop technology route conflicts with the gas engine knock control method. The gas engine knock control method usually adopts the air-fuel ratio closed-loop method, that is, by reducing the ignition advance angle to control the air-fuel ratio unchanged, that is, to control the ratio of air and gas unchanged, and the concentration of gas is also unchanged at this time, so as to reduce the combustion speed of the gas and thus suppress knock.

[0043] NO xThe closed-loop technology route does not use the air-fuel ratio closed-loop method, but uses the method of keeping the actual emission value of the nitrogen-oxygen mixture in the exhaust tail pipe the same as the preset emission value, which will lead to NO x In the closed-loop technology route, after reducing the ignition advance angle, the combustion speed slows down, resulting in a decrease in the actual emission value in the exhaust gas. In order to keep the actual emission value the same as the preset emission value, the air-fuel ratio will be reduced to increase the concentration of the fuel gas. However, the increase in the concentration of the fuel gas will accelerate the combustion speed, resulting in the current gas engine based on nitrogen oxide closed loop cannot effectively suppress knock.

[0044] Based on this, the present application provides a knock protection method for a nitrogen-oxygen closed-loop gas engine, the method comprising: obtaining the actual emission value of the nitrogen-oxygen mixture at the exhaust tail pipe position, comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture, and obtaining a comparison result. If the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is delayed, and the closed-loop correction coefficient of the nitrogen-oxygen closed-loop gas engine is locked, thereby ensuring that the nitrogen-oxygen closed-loop processing will not be triggered while the ignition advance angle is delayed, that is, the air-fuel ratio will not be reduced to increase the concentration of the fuel gas, and the delay in the ignition advance angle will cause the combustion speed to slow down, thereby effectively suppressing knock, and the increase in the concentration of the fuel gas caused by the nitrogen-oxygen closed-loop processing will not eventually lead to an increase in the combustion speed, and finally avoid the conflict between the nitrogen-oxygen closed-loop processing and the suppression of knock.

[0045] In order to better understand the technical solution and technical effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.

[0046] See also Figure 2 , which is a flow chart of a knock protection method for a nitrogen-oxygen closed-loop gas engine provided in an embodiment of the present application.

[0047] The knock protection method of the nitrogen-oxygen closed-loop gas engine provided in the embodiment of the present application can be applied to an electronic control unit (ECU). The knock protection method of the nitrogen-oxygen closed-loop gas engine provided in the embodiment of the present application comprises the following steps:

[0048] S101, obtaining an actual emission value of a nitrogen-oxygen mixture at an exhaust tail pipe position.

[0049] In the embodiment of the present application, considering that the current gas engine adopts NO x The closed-loop technical route is to keep the actual emission value of the nitrogen oxide mixture in the exhaust tail pipe the same as the preset emission value, so it is necessary to obtain the actual emission value of the nitrogen oxide mixture at the exhaust tail pipe position.

[0050] Specifically, the nitrogen oxide sensor disposed in the exhaust tail pipe can be used to collect the actual emission value of the nitrogen oxide mixture at the exhaust tail pipe in real time. The unit of the actual emission value is ppm. The actual emission value of the nitrogen oxide mixture is related to the engine speed and load.

[0051] S102, comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture to obtain a comparison result.

[0052] In the embodiment of the present application, since the current gas generator uses NO x Closed-loop technology route, therefore, after obtaining the actual emission value of the nitrogen-oxygen mixture, the actual emission value can be compared with the set emission value of the nitrogen-oxygen mixture to obtain a comparison result. The comparison results include the actual emission value being less than the set emission value, the actual emission value being equal to the set emission value, and the actual emission value being greater than the set emission value.

[0053] NO x The closed-loop technical route for closed-loop management of nitrogen-oxygen mixtures is mainly divided into two paths. The first path is that when the actual emission value is greater than the set emission value, the electronic control unit reduces the concentration of the gas, thereby reducing the production of nitrogen-oxygen mixtures, and ultimately reducing the actual emission value to the set emission value. The second path is that when the actual emission value is less than the set emission value, the electronic control unit increases the concentration of the gas, thereby increasing the production of nitrogen-oxygen mixtures, and ultimately increasing the actual emission value to the set emission value. Among them, the electronic control unit increases the gas concentration or reduces the gas concentration by correcting the gas concentration through a closed-loop correction factor (CL).

[0054] S103, if the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is delayed and the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine is locked.

[0055] In the embodiment of the present application, if the comparison result is that the actual emission value is less than the set emission value, then according to NO x The second path of the closed-loop technical route will increase the gas concentration to increase the actual emission value, but increasing the gas concentration will increase the combustion speed, which conflicts with the knock control of the gas engine to reduce the combustion speed of the gas. Therefore, when performing knock control based on a nitrogen oxide closed-loop gas engine, when the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is delayed to reduce the combustion speed of the gas and suppress knock. At the same time, the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine is locked to prevent the electronic control unit from using the closed-loop correction coefficient to adjust the gas concentration. In other words, ensure that the closed-loop correction coefficient is locked while the ignition advance angle is delayed, and the nitrogen oxide closed-loop processing will not be triggered, that is, the gas concentration will not increase, and the air-fuel ratio will not be reduced. Since the delay in the ignition advance angle will cause the combustion speed to slow down, knock will be effectively suppressed, and the increase in gas concentration caused by the nitrogen oxide closed-loop processing will not ultimately lead to an increase in the combustion speed, ultimately avoiding the conflict between nitrogen oxide closed-loop processing and knock suppression. Refer to Figure 3 shown.

[0056] In the embodiment of the present application, if the comparison result is that the actual emission value is equal to the set emission value, the ignition advance angle can be delayed to reduce the combustion speed of the gas and suppress knock. Considering that the actual emission value is equal to the set emission value, the electronic control unit will not trigger the nitrogen oxide closed-loop processing. However, in order to further avoid the instantaneous change of the actual emission value due to the reduction of the combustion speed of the gas, the risk of the closed-loop correction coefficient being triggered, the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine can be locked while the ignition advance angle is delayed, thereby avoiding the change of the gas concentration when the ignition advance angle is delayed. Figure 3 shown.

[0057] In an embodiment of the present application, if the comparison result is that the actual emission value is greater than the set emission value, the ignition advance angle can be delayed to reduce the combustion speed of the gas and suppress knock. Since the actual emission value is greater than the set emission value, it means that the gas concentration is high at this time. The electronic control unit triggers the nitrogen oxide closed-loop processing and uses the closed-loop correction coefficient to reduce the gas concentration, thereby increasing the air-fuel ratio, that is, increasing the ratio of air to gas. In other words, if the comparison result is that the actual emission value is greater than the set emission value, only the ignition advance angle can be delayed, and the closed-loop correction coefficient is not locked. In this way, the gas concentration is reduced under the action of the closed-loop correction coefficient, and the air-fuel ratio is increased. The delayed ignition advance angle and the increase in the air-fuel ratio jointly suppress the combustion of the gas, and the knock suppression effect is better. Refer to Figure 3 shown.

[0058] In an embodiment of the present application, when the combustion of the fuel gas is suppressed by delaying the ignition advance angle and increasing the air-fuel ratio, after suppressing knock, the actual emission value of the nitrogen oxygen mixture may be reduced to the set emission value. At this time, in order to continue to suppress knock, the knock processing in which the comparison result is that the actual emission value is less than the set emission value can be continued, that is, the ignition advance angle is delayed, the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine is locked, and the concentration of the fuel gas is reduced until the knock signal is no longer detected, thereby further improving the knock control effect.

[0059] In an embodiment of the present application, the electronic control unit can continuously detect knock so as to timely handle the knock of the gas engine. Specifically, it can detect in real time whether there is a knock signal, and if there is a knock signal, compare the actual emission value with the set emission value, so as to determine whether to lock the closed-loop correction coefficient according to the comparison result.

[0060] Considering that knock is divided into slight knock and severe knock, different degrees of knock have different treatments on the gas engine. Therefore, after a knock signal is detected, the knock signal can be identified to determine whether the knock signal is a slight knock signal or a severe knock signal.

[0061] When the knock signal is determined to be a slight knock signal, the actual emission value and the set emission value can be directly compared, so as to realize the knock treatment by combining nitrogen oxide closed-loop treatment and knock control. Figure 3 shown.

[0062] When the detonation signal is determined to be a serious detonation signal, the operation of the nitrogen oxide closed-loop gas generator can be stopped directly to prevent safety problems. Figure 3 shown.

[0063] In an embodiment of the present application, the electronic control unit can continuously detect knock. When no knock signal is detected, it can determine whether the ignition advance angle is delayed. If delayed, the ignition advance angle is restored to the set target value. That is to say, after the ignition advance angle is delayed by controlling the knock, the ignition advance angle can be restored.

[0064] It can be seen that if the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is delayed, and the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine is locked, thereby ensuring that the nitrogen oxide closed-loop processing will not be triggered while the ignition advance angle is delayed, that is, the air-fuel ratio will not be reduced to increase the concentration of the fuel gas. Since the delay of the ignition advance angle will cause the combustion speed to slow down, the detonation will be effectively suppressed, and the increase in the concentration of the fuel gas caused by the nitrogen oxide closed-loop processing will not eventually lead to an increase in the combustion speed, thereby avoiding the conflict between the nitrogen oxide closed-loop processing and the suppression of detonation. The detonation protection method for the nitrogen oxide closed-loop gas engine provided in the embodiment of the present application optimizes the detonation control strategy according to the gas engine detonation control idea and the characteristics of the NOx closed-loop, and can quickly and effectively suppress the NOx closed-loop detonation.

[0065] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the box can also occur in a sequence different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0066] In some embodiments, the servers may communicate using any currently known or future developed network protocol, such as HTTP (HyperText Transfer Protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0067] Although operations are depicted in a particular order, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential order.Multitasking and parallel processing may be advantageous under certain circumstances.

[0068] It should be understood that the various steps described in the method implementation of the present application can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0069] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0070] Based on the detonation protection method of a nitrogen-oxygen closed-loop gas engine provided in the above embodiment, the embodiment of the present application further provides a detonation protection device of a nitrogen-oxygen closed-loop gas engine, and its working principle is described in detail below in conjunction with the accompanying drawings.

[0071] See also Figure 4 , which is a structural schematic diagram of a knock protection device for a nitrogen-oxygen closed-loop gas engine provided in an embodiment of the present application.

[0072] The present embodiment provides a detonation protection device 400 for a nitrogen-oxygen closed-loop gas engine, comprising:

[0073] An acquisition unit 410 is used to acquire an actual emission value of the nitrogen-oxygen mixture at the exhaust tail pipe position;

[0074] A comparison unit 420, used to compare the actual emission value with the set emission value of the nitrogen-oxygen mixture to obtain a comparison result;

[0075] The delay unit 430 is used to delay the ignition advance angle and lock the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine if the comparison result is that the actual emission value is less than the set emission value.

[0076] In some embodiments, the deferring unit 430 is further configured to:

[0077] If the comparison result is that the actual emission value is greater than the set emission value, the ignition advance angle is retarded and the air-fuel ratio is increased.

[0078] In some embodiments, before the comparison unit 420 compares the actual emission value with the set emission value of the nitrogen-oxygen mixture, the device further includes a detection unit, the detection unit being configured to:

[0079] Real-time detection of whether there is a knock signal;

[0080] If there is a knock signal, the actual emission value is compared with the set emission value of the nitrogen oxygen mixture.

[0081] In some embodiments, if there is a knock signal, the comparison unit 420 is used to:

[0082] If there is a knock signal, it is determined that the knock signal is a slight knock signal, and then the actual emission value is compared with the set emission value of the nitrogen oxygen mixture.

[0083] In some embodiments, the device further comprises a stopping unit, the stopping unit being configured to:

[0084] If it is determined that the knock signal is a severe knock signal, the operation of the nitrogen oxide closed-loop gas generator is directly stopped.

[0085] In some embodiments, the deferring unit 430 is further configured to:

[0086] When the air-fuel ratio is increased to reduce the actual emission value to less than the set emission value, the steps of delaying the ignition advance angle, locking the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine, and reducing the concentration of the fuel gas are continued until no knock signal is detected.

[0087] In some embodiments, the apparatus further comprises a recovery unit, the recovery unit being configured to:

[0088] If no knock signal is detected, it is determined whether the ignition advance angle is delayed, and if delayed, the ignition advance angle is restored to the set target value.

[0089] The units involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of a unit does not, in some cases, constitute a limitation on the unit itself.

[0090] The names of the messages or information exchanged between multiple units in the embodiments of the present application are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0091] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0092] Based on the multi-row elastic layout method provided in the above embodiment, the embodiment of the present application further provides a multi-row elastic layout device, the multi-row elastic layout device comprising:

[0093] The processor and the memory may be one or more processors. In some embodiments of the present application, the processor and the memory may be connected via a bus or other means.

[0094] The memory may include a read-only memory and a random access memory, and provides instructions and data to the processor. A portion of the memory may also include an NVRAM. The memory stores an operating system and operating instructions, executable modules or data structures, or a subset thereof, or an extended set thereof, wherein the operating instructions may include various operating instructions for implementing various operations. The operating system may include various system programs for implementing various basic services and processing hardware-based tasks.

[0095] The processor controls the operation of the terminal device and may also be referred to as a CPU.

[0096] The method disclosed in the above embodiment of the present application can be applied to a processor or implemented by a processor. The processor can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined to perform. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0097] The embodiment of the present application also provides a computer-readable medium for storing program code, where the program code is used to execute any one of the methods of the aforementioned embodiments.

[0098] In the context of the present application, a computer-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. A more specific example of a computer-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0099] It should be noted that the computer-readable medium mentioned above in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0100] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0101] The embodiment of the present application further provides a computer program product. When the computer program product is run on a terminal device, the terminal device executes any one of the implementation methods of the aforementioned embodiments.

[0102] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device, or installed from a ROM. When the computer program is executed by a processing device, the above-mentioned functions defined in the method of the embodiment of the present application are executed.

[0103] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0104] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present application. Certain features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0105] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A knock protection method for a nitrogen-oxygen closed-loop gas engine, characterized in that: The method comprises: Obtaining the actual emission value of nitrogen and oxygen mixture at the exhaust tail pipe position; Comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture to obtain a comparison result; If the comparison result is that the actual emission value is less than the set emission value, the ignition advance angle is delayed and the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine is locked to avoid using the closed-loop correction coefficient to adjust the concentration of the fuel gas and to avoid triggering the nitrogen oxide closed-loop processing to adjust the concentration of the fuel gas.

2. The method according to claim 1, characterized in that The method further comprises: If the comparison result is that the actual emission value is greater than the set emission value, the ignition advance angle is retarded and the air-fuel ratio is increased.

3. The method according to claim 2, characterized in that Before comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture, the method further includes: Real-time detection of whether there is a knock signal; If there is a knock signal, the actual emission value is compared with the set emission value of the nitrogen oxygen mixture.

4. The method according to claim 3, characterized in that If there is a knock signal, comparing the actual emission value with the set emission value of the nitrogen and oxygen mixture comprises: If there is a knock signal, it is determined that the knock signal is a slight knock signal, and then the actual emission value is compared with the set emission value of the nitrogen oxygen mixture.

5. The method according to claim 4, characterized in that The method further comprises: If it is determined that the knock signal is a severe knock signal, the operation of the nitrogen oxide closed-loop gas generator is directly stopped.

6. The method according to claim 3, characterized in that The method further comprises: When the air-fuel ratio is increased to reduce the actual emission value to less than the set emission value, the steps of delaying the ignition advance angle, locking the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine, and reducing the concentration of the fuel gas are continued until no knock signal is detected.

7. The method according to claim 3, characterized in that The method further comprises: If no knock signal is detected, it is determined whether the ignition advance angle is delayed, and if delayed, the ignition advance angle is restored to the set target value.

8. A detonation protection device for a nitrogen-oxygen closed-loop gas engine, characterized in that: The device comprises: An acquisition unit, used for acquiring an actual emission value of a nitrogen-oxygen mixture at an exhaust tail pipe position; A comparison unit, used for comparing the actual emission value with the set emission value of the nitrogen-oxygen mixture to obtain a comparison result; The delay unit is used to delay the ignition advance angle and lock the closed-loop correction coefficient of the nitrogen oxide closed-loop gas engine if the comparison result is that the actual emission value is less than the set emission value, so as to avoid using the closed-loop correction coefficient to adjust the concentration of the fuel gas and avoid triggering the nitrogen oxide closed-loop processing.

9. A detonation protection device for a nitrogen-oxygen closed-loop gas engine, characterized in that: The device comprises: a processor and a memory; The memory is used to store instructions; The processor is used to execute the instructions in the memory to perform the method according to any one of claims 1 to 7.

10. A computer-readable medium, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to execute the method according to any one of claims 1 to 7.

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