Method and device for adjusting ignition position of spark plug, vehicle, medium and product

Abstract

The invention relates to the technical field of vehicles, in particular to an adjusting method and device for the ignition position of a spark plug, a vehicle, a medium and a product. If it is determined that the engine meets the abnormal condition according to the actual pressure and the knocking amplitude in the engine, the target current of a spark plug is determined according to the fuel pressure and the air-fuel ratio; adjusting the ignition position of the spark plug according to the target current. Therefore, the problem that dynamic adjustment of the ignition position cannot be achieved due to the fact that the ignition position is changed by disassembling, assembling and replacing the spark plug in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, device, vehicle, medium and product for adjusting the ignition position of a spark plug. Background Art

[0002] As an important development direction in the field of clean energy, hydrogen internal combustion engines have the characteristics of zero carbon emissions, high efficiency and low cost. Especially with the application of direct injection technology, hydrogen internal combustion engines can not only effectively suppress backfire, but also significantly improve power density. However, the low ignition energy requirement and fast combustion speed of hydrogen make hydrogen engines prone to pre-ignition and knock problems. Therefore, there are more stringent requirements for ignition time, ignition energy and ignition position in the engine cylinder to ensure a stable and efficient combustion process.

[0003] In the related art, the spark plug design has a fixed ignition position after installation, which limits the engine's ability to adjust the ignition position under different working conditions, and thus cannot effectively deal with the pre-ignition and knock problems of hydrogen engines. If the ignition position needs to be changed, it is generally achieved by disassembling and replacing the spark plug, which is inconvenient to operate and cannot achieve real-time optimization and adjustment of the ignition position. Summary of the invention

[0004] The present application provides a method, device, vehicle, medium and product for adjusting the ignition position of a spark plug, so as to solve the problem that the related art changes the ignition position by disassembling and replacing the spark plug, but cannot realize dynamic adjustment of the ignition position.

[0005] The first aspect of the present application provides a method for adjusting the ignition position of a spark plug, comprising the following steps: obtaining the actual pressure and knock amplitude inside the engine; if it is determined that the engine meets abnormal conditions based on the actual pressure and knock amplitude inside the engine, then determining the target current of the spark plug based on the fuel pressure and the air-fuel ratio; and adjusting the ignition position of the spark plug based on the target current.

[0006] Optionally, determining the target current of the spark plug according to the fuel pressure and the air-fuel ratio includes: obtaining a mapping relationship among the air-fuel ratio, the fuel pressure and the target current; and determining the target current passing through the spark plug according to the mapping relationship, the air-fuel ratio and the fuel pressure.

[0007] Optionally, adjusting the ignition position of the spark plug according to a target current includes: determining a target position of the spark plug electrode according to the target current; identifying a target distance and a target direction between a current position of the spark plug electrode and the target position; and controlling the spark plug electrode to move to the target position according to the target distance and the target direction.

[0008] Optionally, the abnormal condition is that the actual pressure is greater than a preset pressure threshold and / or the knock amplitude is greater than a preset amplitude for a number of times greater than a preset number.

[0009] Optionally, before determining the target current of the spark plug according to the fuel pressure and the air-fuel ratio, the method further includes: obtaining the fuel injection amount and oxygen content of the engine; and calculating the air-fuel ratio according to the fuel injection amount and the oxygen content.

[0010] The second aspect of the present application provides a spark plug ignition position adjustment device, including: an acquisition module, used to obtain the actual pressure and knock amplitude inside the engine; a determination module, used to determine the target current of the spark plug according to the fuel pressure and air-fuel ratio if it is determined that the engine meets the abnormal condition according to the actual pressure and knock amplitude inside the engine; an adjustment module, used to adjust the ignition position of the spark plug according to the target current.

[0011] Optionally, the determination module is further used to obtain a mapping relationship among the air-fuel ratio, the fuel pressure and the target current; and determine the target current passing through the spark plug according to the mapping relationship, the air-fuel ratio and the fuel pressure.

[0012] Optionally, the adjustment module is further used to determine a target position of a spark plug electrode based on the target current; identify a target distance and a target direction between a current position of the spark plug electrode and the target position; and control the spark plug electrode to move to the target position based on the target distance and the target direction.

[0013] Optionally, the abnormal condition is that the actual pressure is greater than a preset pressure threshold and / or the knock amplitude is greater than a preset amplitude for a number of times greater than a preset number.

[0014] Optionally, the spark plug ignition position adjustment device also includes: a calculation module, which is used to obtain the fuel injection amount and oxygen content of the engine before determining the target current of the spark plug according to the fuel pressure and the air-fuel ratio; and calculate the air-fuel ratio according to the fuel injection amount and the oxygen content.

[0015] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for adjusting the spark plug ignition position as described in the above embodiment.

[0016] A fourth aspect of the present application provides a computer-readable storage medium having a computer program or instruction stored thereon. When the computer program or instruction is executed, it is used to implement the method for adjusting the spark plug ignition position as in the above-mentioned embodiment.

[0017] The fifth aspect of the present application provides a computer program product, including: a computer program or instructions, which, when executed, implements the method for adjusting the spark plug ignition position as described in the above embodiment.

[0018] Therefore, this application has at least the following beneficial effects:

[0019] The embodiment of the present application can control the current inside the spark plug according to the fuel pressure and air-fuel ratio when the engine meets abnormal conditions according to the actual pressure inside the engine and the knock amplitude, so as to realize the dynamic change of the spark plug ignition position, and ensure that the engine can maintain an efficient, stable and safe operating state under various operating conditions. Thus, the problem that the ignition position cannot be dynamically adjusted by disassembling and replacing the spark plug in the related art is solved.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A flowchart of a method for adjusting the spark plug ignition position according to an embodiment of the present application;

[0023] Figure 2 A schematic diagram of spark plug ignition position adjustment according to an embodiment of the present application;

[0024] Figure 3 A block diagram of a spark plug ignition position adjustment device provided according to an embodiment of the present application;

[0025] Figure 4 It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0027] The following describes the spark plug ignition position adjustment method, device, vehicle, medium and product of the embodiment of the present application with reference to the accompanying drawings. In response to the problems mentioned in the above background technology, the present application provides a spark plug ignition position adjustment method. In this method, when it is determined that the engine meets abnormal conditions based on the actual pressure inside the engine and the knock amplitude, the current inside the spark plug is controlled according to the fuel pressure and the air-fuel ratio to achieve dynamic changes in the spark plug ignition position, which can ensure that the engine can maintain an efficient, stable and safe operating state under various operating conditions. Thereby, the problem that the ignition position cannot be dynamically adjusted by disassembling and replacing the spark plug in the related art is solved.

[0028] Specifically, Figure 1 A schematic flow chart of a method for adjusting the ignition position of a spark plug provided in an embodiment of the present application.

[0029] like Figure 1 As shown, the method for adjusting the spark plug ignition position comprises the following steps:

[0030] In step S101, the actual pressure and knock amplitude inside the engine are obtained.

[0031] It is understandable that the embodiments of the present application can detect the actual pressure and knock amplitude inside the engine through sensors on the engine. For example, the cylinder pressure sensor is used to monitor the actual pressure inside the engine cylinder, usually installed on the cylinder head, and directly measures the pressure of the gas in the combustion chamber. The cylinder pressure sensor converts the detected pressure changes into electrical signals and sends them to the ECU (Engine Control Unit), which serves as an important basis for the ECU to adjust the ignition position to prevent further knock. The knock sensor is used to monitor whether the engine has knocked. It is usually installed on the engine cylinder block or cylinder head. It can sense the vibration caused by knock. The knock sensor will detect abnormal vibration amplitude or knocking sound, convert it into an electrical signal and send it to the ECU. The ECU determines the knock amplitude based on the strength and frequency of the signal. Therefore, the combined use of the knock sensor and the cylinder pressure sensor in the embodiments of the present application can enable the ECU to monitor the operating status of the engine more comprehensively and adjust the ignition timing and other parameters in time.

[0032] In step S102, if it is determined that the engine meets the abnormal condition based on the actual pressure inside the engine and the knock amplitude, the target current of the spark plug is determined based on the fuel pressure and the air-fuel ratio.

[0033] The abnormal condition is that the actual pressure is greater than a preset pressure threshold and / or the knock amplitude is greater than a preset amplitude for a number of times greater than a preset number.

[0034] Specifically, the embodiment of the present application can continuously monitor the actual pressure and knock amplitude inside the engine. If it is higher than the preset pressure threshold, it may indicate that the pressure in the combustion chamber is abnormal. If the knock amplitude is higher than the preset amplitude threshold, it can be determined that there is an abnormality. When the cumulative number of abnormalities is greater than the preset number, the embodiment of the present application determines that the engine is running in an abnormal state, and the ignition position needs to be adjusted. Among them, the preset pressure threshold, preset amplitude and preset number can be set according to actual conditions and are not specifically limited.

[0035] Furthermore, the embodiment of the present application can obtain the fuel injection amount and oxygen content of the engine; calculate the air-fuel ratio based on the fuel injection amount and oxygen content, wherein the oxygen content can be detected by an oxygen sensor installed on the engine exhaust pipe, and the oxygen content is converted into an electrical signal and sent to the ECU, and the ECU adjusts the injection amount of the injector based on these signals. The hydrogen pressure can also be detected by a rail pressure sensor installed on the hydrogen rail. Pressure is a key factor affecting the shape of the hydrogen gas beam, and different gas beam shapes have different requirements for the ignition position.

[0036] In one embodiment of the present application, determining the target current of the spark plug according to the fuel pressure and the air-fuel ratio includes: obtaining a mapping relationship among the air-fuel ratio, the fuel pressure and the target current; and determining the target current passing through the spark plug according to the mapping relationship, the air-fuel ratio and the fuel pressure.

[0037] The embodiment of the present application can adjust the ignition position by adjusting the current that controls the spark plug ignition position, and detect the pre-ignition and knock conditions in the cylinder through the knock sensor and the cylinder pressure sensor to obtain the corresponding air-fuel ratio, hydrogen pressure, and target current when the pre-ignition and knock conditions are optimal, thereby pre-calibrating the mapping relationship of the ignition position under different working conditions. During the actual operation of the engine, the embodiment of the present application can determine the corresponding target current under the working condition based on the mapping relationship of the ignition position under different working conditions, as well as the obtained air-fuel ratio and hydrogen pressure.

[0038] In step S103, the ignition position of the spark plug is adjusted according to the target current.

[0039] In one embodiment of the present application, adjusting the ignition position of the spark plug according to a target current includes: determining a target position of the spark plug electrode according to the target current; identifying a target distance and a target direction between a current position of the spark plug electrode and the target position; and controlling the spark plug electrode to move to the target position according to the target distance and the target direction.

[0040] In the embodiment of the present application, the spark plug integrates a coil, a spring and an iron core, wherein the coil is usually a conductive coil wound around the iron core, and when current passes through the coil, a magnetic field is generated. The spring is used to provide a reverse force, and when the electromagnetic force disappears, the spring resets the electrode to its initial position. The iron core is located inside the coil to enhance the magnetic field strength and improve the electromagnetic effect.

[0041] Specifically, if Figure 2 As shown, the embodiment of the present application detects the pre-ignition and knock conditions in the cylinder through the knock sensor and the cylinder pressure sensor. When the abnormal conditions of the above embodiment are met, the fuel pressure and the air-fuel ratio are determined according to the oxygen sensor and the rail pressure sensor, thereby obtaining the target current of the spark plug. The embodiment of the present application can control the current passing through the coil to be the target current, and then generate the corresponding electromagnetic force. The electromagnetic force overcomes the elastic force of the spring and pushes the electrode connected to the iron core upward by a certain distance, thereby controlling the position of the spark plug electrode and realizing fine control of the ignition position.

[0042] According to the spark plug ignition position adjustment method proposed in the embodiment of the present application, when the engine is determined to meet abnormal conditions according to the actual pressure inside the engine and the knock amplitude, the current inside the spark plug is controlled according to the fuel pressure and the air-fuel ratio to achieve dynamic changes in the spark plug ignition position, which can ensure that the engine can maintain an efficient, stable and safe operating state under various operating conditions. Therefore, the problem that the ignition position cannot be dynamically adjusted by disassembling and replacing the spark plug in the related art is solved.

[0043] Next, a spark plug ignition position adjustment device according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0044] Figure 3 It is a block diagram of a spark plug ignition position adjustment device according to an embodiment of the present application.

[0045] like Figure 3 As shown, the spark plug ignition position adjustment device 10 includes: an acquisition module 100 , a determination module 200 and an adjustment module 300 .

[0046] Among them, the acquisition module 100 is used to obtain the actual pressure and knock amplitude inside the engine; the determination module 200 is used to determine the target current of the spark plug according to the fuel pressure and the air-fuel ratio if it is determined that the engine meets the abnormal condition according to the actual pressure and knock amplitude inside the engine; the adjustment module 300 is used to adjust the ignition position of the spark plug according to the target current.

[0047] In one embodiment of the present application, the determination module 200 is further used to obtain a mapping relationship among the air-fuel ratio, the fuel pressure and the target current; and determine the target current passing through the spark plug according to the mapping relationship, the air-fuel ratio and the fuel pressure.

[0048] In one embodiment of the present application, the adjustment module 300 is further used to determine the target position of the spark plug electrode based on the target current; identify the target distance and target direction between the current position of the spark plug electrode and the target position; and control the spark plug electrode to move to the target position based on the target distance and target direction.

[0049] In one embodiment of the present application, the abnormal condition is that the actual pressure is greater than a preset pressure threshold and / or the number of times that the knock amplitude is greater than a preset amplitude is greater than a preset number.

[0050] In one embodiment of the present application, the spark plug ignition position adjustment device 10 also includes: a calculation module for obtaining the fuel injection amount and oxygen content of the engine before determining the target current of the spark plug according to the fuel pressure and the air-fuel ratio; and calculating the air-fuel ratio according to the fuel injection amount and the oxygen content.

[0051] It should be noted that the aforementioned explanation of the embodiment of the method for adjusting the spark plug ignition position is also applicable to the spark plug ignition position adjusting device of this embodiment, and will not be repeated here.

[0052] According to the spark plug ignition position adjustment device proposed in the embodiment of the present application, when the engine meets abnormal conditions according to the actual pressure inside the engine and the knock amplitude, the current inside the spark plug is controlled according to the fuel pressure and the air-fuel ratio to achieve dynamic changes in the spark plug ignition position, which can ensure that the engine can maintain an efficient, stable and safe operating state under various operating conditions. Therefore, the problem that the ignition position cannot be dynamically adjusted by disassembling and replacing the spark plug in the related art is solved.

[0053] Figure 4 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0054] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0055] When the processor 402 executes the program, the method for adjusting the spark plug ignition position provided in the above embodiment is implemented.

[0056] Furthermore, the vehicle also includes:

[0057] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0058] The memory 401 is used to store computer programs that can be executed on the processor 402 .

[0059] The memory 401 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0060] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0061] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0062] The processor 402 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0063] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for adjusting the spark plug ignition position.

[0064] The embodiment of the present application also provides a computer program product, including: a computer program or instructions, when the computer program or instructions are executed, to implement the above-mentioned method for adjusting the spark plug ignition position.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0068] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0069] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for adjusting the ignition position of a spark plug, characterized in that: The following steps are involved: Obtain the actual pressure and knock amplitude inside the engine; If it is determined that the engine meets an abnormal condition according to the actual pressure inside the engine and the knock amplitude, determining a target current of the spark plug according to the fuel pressure and the air-fuel ratio; An ignition position of the spark plug is adjusted according to the target current.

2. The method for adjusting the spark plug ignition position according to claim 1, characterized in that: The step of determining the target current of the spark plug according to the fuel pressure and the air-fuel ratio comprises: Obtaining a mapping relationship between air-fuel ratio, fuel pressure and target current; A target current passing through the spark plug is determined based on the mapping relationship, the air-fuel ratio, and the fuel pressure.

3. The method for adjusting the spark plug ignition position according to claim 1, characterized in that: The step of adjusting the ignition position of the spark plug according to the target current includes: determining a target position of a spark plug electrode according to the target current; identifying a target distance and a target direction between a current position of the spark plug electrode and the target position; The spark plug electrode is controlled to move to the target position according to the target distance and the target direction.

4. The method for adjusting the spark plug ignition position according to claim 1, characterized in that: The abnormal condition is that the actual pressure is greater than a preset pressure threshold and / or the knock amplitude is greater than a preset amplitude for a number of times greater than a preset number.

5. The method for adjusting the spark plug ignition position according to claim 1, characterized in that: Before determining the target current of the spark plug according to the fuel pressure and the air-fuel ratio, the method further includes: obtaining the fuel injection amount and oxygen content of the engine; The air-fuel ratio is calculated based on the fuel injection amount and the oxygen content.

6. A spark plug ignition position adjustment device, characterized in that: include: An acquisition module is used to obtain the actual pressure and knock amplitude inside the engine; a determination module, configured to determine a target current of the spark plug according to a fuel pressure and an air-fuel ratio if it is determined that the engine meets an abnormal condition according to an actual pressure inside the engine and the knock amplitude; An adjustment module is used to adjust the ignition position of the spark plug according to the target current.

7. The spark plug ignition position adjustment device according to claim 6, characterized in that: The adjustment module is further used for: Get the current position of the spark plug electrode; The current position of the spark plug electrode is adjusted to move upward by a preset distance according to the target current until the actual pressure is within a preset range.

8. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for adjusting the spark plug ignition position as described in any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed, the method for adjusting the spark plug ignition position according to any one of claims 1 to 5 is implemented.

10. A computer program product comprising: A computer program or instruction, characterized in that when the computer program or instruction is executed, it implements the method for adjusting the spark plug ignition position according to any one of claims 1 to 5.

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