An engine compression ratio adjusting method, device, computer equipment and medium

Abstract

The engine compression ratio adjusting method, device, computer device and medium are disclosed, the adjusting method is applied to an engine, the engine comprises at least three cylinder bodies, and the adjusting method comprises the following steps: obtaining the pre-ignition frequency of the cylinder body under the initial compression ratio, the pre-ignition frequency refers to the pre-ignition times per unit time; the cylinder body with the maximum pre-ignition frequency under the initial compression ratio is controlled as the first cylinder body; the compression ratio of the cylinder body is reduced from the initial compression ratio to the first compression ratio, and the pre-ignition frequency of the first cylinder body under the first compression ratio is less than or equal to the preset frequency; the compression ratio of the cylinder bodies except the first cylinder body is increased from the first compression ratio to the second compression ratio, and the pre-ignition frequency of the cylinder bodies except the first cylinder body under the second compression ratio is less than or equal to the preset frequency. According to the pre-ignition condition of the multiple cylinder bodies of the engine, the dynamic compression ratio adjustment is carried out, the energy-saving condition is ensured, and the pre-ignition condition can be avoided.

Description

Technical Field

[0001] This invention relates to the technical field of engine compression ratio adjustment, and in particular to a method, apparatus, computer equipment, and medium for adjusting engine compression ratio. Background Technology

[0002] A higher engine compression ratio generally leads to higher engine thermal efficiency. However, due to increasingly stringent emission requirements and fuel efficiency standards, as well as the widespread application of technologies such as turbocharged direct injection to increase power density, engine knocking and pre-ignition problems are becoming increasingly prominent.

[0003] Pre-ignition can lead to a severe deterioration in noise levels during operation, and may even cause problems such as knocking, connecting rod breakage, and piston scoring. Therefore, reducing engine knocking and pre-ignition, as well as lowering emissions and saving energy, is receiving increasing attention. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a method, apparatus, computer equipment, and medium for adjusting the compression ratio of an engine. By dynamically adjusting the compression ratio of multiple cylinders of the engine according to their pre-ignition conditions, energy saving can be ensured while pre-ignition can be avoided.

[0005] In a first aspect, embodiments of the present invention provide a method for adjusting the compression ratio of an engine, applied to an engine comprising at least three cylinders, including:

[0006] The pre-ignition frequency of the cylinder block at the initial compression ratio is obtained, wherein the pre-ignition frequency refers to the number of pre-ignitions per unit time;

[0007] The cylinder block that has the highest pre-ignition frequency at the initial compression ratio is the first cylinder block;

[0008] The compression ratio of the cylinder is controlled to decrease from the initial compression ratio to a first compression ratio, and the pre-ignition frequency of the first cylinder at the first compression ratio is less than or equal to a preset frequency;

[0009] The compression ratio of the cylinders other than the first cylinder is controlled to increase from the first compression ratio to the second compression ratio, and the pre-ignition frequency of the cylinders other than the first cylinder at the second compression ratio is less than or equal to a preset frequency.

[0010] Secondly, embodiments of the present invention provide an engine compression ratio adjustment device, applied to an engine, comprising:

[0011] The pre-ignition frequency acquisition module is used to acquire the pre-ignition frequency of the cylinder block at the initial compression ratio, wherein the pre-ignition frequency refers to the number of pre-ignitions per unit time.

[0012] The first cylinder block determination module is used to control the cylinder block with the highest pre-ignition frequency at the initial compression ratio as the first cylinder block;

[0013] The first compression ratio determination module is used to control the compression ratio of the cylinder block to decrease from the initial compression ratio to the first compression ratio, and the pre-ignition frequency of the first cylinder block at the first compression ratio is less than or equal to a preset frequency;

[0014] The second compression ratio determination module is used to control the compression ratio of the cylinders other than the first cylinder to be increased from the first compression ratio to the second compression ratio, and the pre-ignition frequency of the cylinders other than the first cylinder at the second compression ratio is less than or equal to a preset frequency.

[0015] Thirdly, an embodiment of the present invention provides a computer device, the computer device comprising:

[0016] One or more processors;

[0017] Storage device for storing one or more programs.

[0018] When the one or more programs are executed by the one or more processors, the one or more processors implement the engine compression ratio adjustment method as described in any of the first aspects.

[0019] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the engine compression ratio adjustment method as described in any of the first aspects.

[0020] This invention provides a method, apparatus, computer device, and medium for adjusting the compression ratio of an engine, wherein the engine includes at least three cylinders. First, the pre-ignition frequency of each cylinder is obtained at an initial compression ratio, and the cylinder with the highest frequency is designated as the first cylinder. The initial compression ratio is then reduced to a first compression ratio, and the pre-ignition frequency of the first cylinder at the first compression ratio meets a preset frequency requirement. Further, the first compression ratio is increased to a second compression ratio, ensuring that the pre-ignition frequencies of the other cylinders besides the first cylinder at the second compression ratio still meet the preset frequency requirement. In other words, the compression ratio of multiple cylinders of the engine is dynamically adjusted according to their pre-ignition status, ensuring overall engine fuel efficiency while preventing pre-ignition. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of exemplary embodiments of the present invention, the accompanying drawings used in describing the embodiments are briefly introduced below. Obviously, the accompanying drawings described are only a portion of the drawings of the embodiments to be described in this invention, and not all of the drawings. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0022] Figure 1 This is a schematic flowchart of an engine compression ratio adjustment method provided in Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of an engine cylinder block provided in Embodiment 1 of the present invention;

[0024] Figure 3 This is a schematic flowchart of an engine compression ratio adjustment method provided in Embodiment 2 of the present invention;

[0025] Figure 4 This is a schematic flowchart of an engine compression ratio adjustment method provided in Embodiment 3 of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of an engine compression ratio adjustment device provided in Embodiment 4 of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of a computer device provided in Embodiment 5 of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be fully described below with reference to the accompanying drawings in the embodiments of this invention, through specific implementation methods. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort fall within the protection scope of this invention.

[0029] Example 1

[0030] Figure 1 This is a schematic flowchart of an engine compression ratio adjustment method provided in Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of an engine cylinder block according to Embodiment 1 of the present invention, for reference. Figure 1 and Figure 2 As shown, this embodiment is applicable to adjusting the compression ratio of an engine cylinder block. This method can be executed by the engine compression ratio adjustment device in this embodiment, wherein the system can be implemented by software and / or hardware, and the system can be integrated with the engine's control settings. The method specifically includes the following steps:

[0031] S110, Obtain the pre-ignition frequency of the cylinder block at the initial compression ratio.

[0032] Specifically, the engine is the power source of a car, and the engine's power comes from its cylinder block; that is, the engine cylinder block is the place where the internal energy of fuel is converted into kinetic energy. Furthermore, an engine includes at least three cylinder blocks. For example, the number of engine cylinder blocks varies. If the engine displacement is between 1 and 1.5 liters, three cylinder blocks are commonly used; if the displacement is around 2.0 liters, four cylinder blocks are commonly used; if the displacement is around 2.5 liters, five cylinder blocks are commonly used; and if the displacement is around 3 liters, six cylinder blocks are commonly used. This embodiment of the invention does not impose a specific limitation on the number of engine cylinder blocks.

[0033] Furthermore, the compression ratio of an engine cylinder refers to the volume ratio of the gas inside the cylinder before and after compression. At the same time, the cylinder can experience pre-ignition, an abnormal phenomenon where the air-fuel mixture spontaneously combusts before ignition. Moreover, temperature is a relatively direct influencing factor on pre-ignition within the cylinder.

[0034] Due to differences in their placement and other factors, the cooling conditions of different cylinder blocks in an engine vary. Consequently, even at the same compression ratio, the pre-ignition frequency of different cylinder blocks will differ per unit time when testing for pre-ignition. The pre-ignition frequency is the number of times a cylinder block experiences pre-ignition per unit time.

[0035] Optionally, all cylinders of the engine can be controlled to obtain the pre-ignition frequency under a uniform preset environment.

[0036] Furthermore, to ensure the accuracy of testing each cylinder block of the engine, the pre-ignition frequency of all cylinder blocks is tested under a uniform environment. This uniform environment can be a standard testing environment for the engine on a test bench, i.e., a commonly used environment for current production and testing. This embodiment of the invention does not impose specific limitations on this.

[0037] S120, the cylinder block with the highest pre-ignition frequency at the initial compression ratio is the first cylinder block.

[0038] Furthermore, step S110 can obtain the pre-ignition frequency of all cylinder blocks of the engine at the initial compression ratio, and sort the pre-ignition frequencies according to their magnitude. The cylinder block with the highest pre-ignition frequency at the initial compression ratio is determined as the first cylinder block, that is, the first cylinder block is most prone to pre-ignition.

[0039] S130, control the compression ratio of the cylinder block to decrease from the initial compression ratio to the first compression ratio, and the pre-ignition frequency of the first cylinder block at the first compression ratio is less than or equal to the preset frequency.

[0040] By adjusting the cylinder compression ratio, pre-ignition in the cylinder can be effectively reduced. Specifically, since the pre-ignition frequency of the first cylinder is relatively high at the initial compression ratio, the compression ratio is reduced to a first compression ratio. At the first compression ratio, the measured pre-ignition frequency of the first cylinder is alleviated and is less than or equal to a preset frequency. The preset frequency is a reasonable parameter for adjusting the pre-ignition frequency according to actual production needs; at this frequency, the engine reliability is relatively high. Based on the specific value of the preset frequency, this embodiment of the invention does not impose specific limitations and can be adaptively adjusted according to actual production needs.

[0041] Optionally, the length of the connecting rod of the first cylinder can be adjusted, and the volume of the piston and the cylinder accommodating space can be adjusted according to the length of the connecting rod.

[0042] For details, please refer to Figure 2 The engine block 10 includes a cylinder block housing space 100, a piston 200, and a connecting rod 300. The piston 200 is placed within the cylinder block housing space 100 and is mechanically connected to the connecting rod 300. Furthermore, the connecting rod 300 may include a cylinder block main shaft 310 and a crank 320 (i.e., a connecting rod 330). The connecting rod 300 can adjust the angle between the cylinder block main shaft 310 and the crank 320 (i.e., the connecting rod 330), thereby adjusting the range of motion of the piston 200 driven by the connecting rod 300, and thus effectively controlling the compression ratio of the cylinder block 10.

[0043] Specifically, Figure 2 The cylinder block provided can be exemplified as a first cylinder block. The volume between the piston 200 and the cylinder block receiving space 100 is adjusted according to the length of the connecting rod 300, thereby adjusting the compression ratio of the first cylinder block. Furthermore, the cylinder block 10 may also include a cylinder head 400 and valves 500. The compression ratio can also be adjusted by adjusting the diameter of the cylinder block receiving space 100, the distance from the cylinder block main shaft 310 to the top surface of the cylinder block receiving space 100, the shape of the piston 200, the shape and size of the cylinder head 400, and the shape and size of the valves 500.

[0044] S140. Control the compression ratio of all cylinders except the first cylinder to increase from the first compression ratio to the second compression ratio, and ensure that the pre-ignition frequency of all cylinders except the first cylinder at the second compression ratio is less than or equal to a preset frequency.

[0045] Furthermore, among all the cylinders in the engine, the first cylinder has a higher pre-ignition frequency, while the other cylinders have a lower pre-ignition frequency. Therefore, if all cylinders operate at the first compression ratio, it will affect the overall efficiency of the engine, which is not conducive to emission reduction and fuel consumption reduction. Therefore, except for the first cylinder, the compression ratio of the other cylinders is increased from the first compression ratio to a second compression ratio, and the pre-ignition frequency of the other cylinders at the second compression ratio also meets the requirement of being less than or equal to a preset frequency. That is, different cylinders can dynamically adjust their compression ratio according to their own pre-ignition frequency, ensuring that the pre-ignition frequency of the engine is alleviated as a whole, while also maintaining engine efficiency. Moreover, the cylinder compression ratio adjustment in this embodiment is not limited to the position and shape of multiple cylinders in the engine; in other words, it is still applicable to engine structures with asymmetrical cylinder block arrangements. Therefore, the adjustment method provided in this embodiment has a wider range of applications.

[0046] Optionally, the length of the connecting rods of the cylinders other than the first cylinder can be adjusted, and the volume of the piston and the cylinder accommodating space can be adjusted according to the length of the connecting rods.

[0047] Specifically, Figure 2 The cylinder provided can be, for example, any cylinder other than the first cylinder. The volume between the piston 200 and the cylinder accommodating space 100 is adjusted according to the length of the connecting rod 300, thereby adjusting the compression ratio of the first cylinder.

[0048] In summary, the engine compression ratio adjustment method provided by this invention first obtains the pre-ignition frequency of each cylinder at an initial compression ratio and determines the cylinder with the highest frequency as the first cylinder; then, the initial compression ratio is reduced to a first compression ratio, and the pre-ignition frequency of the first cylinder at the first compression ratio meets the preset frequency requirement; further, the first compression ratio is increased to a second compression ratio, and it is ensured that the pre-ignition frequency of other cylinders besides the first cylinder at the second compression ratio still meets the preset frequency requirement. That is, the compression ratio of multiple cylinders in the engine is dynamically adjusted according to their pre-ignition status, ensuring overall engine fuel efficiency while preventing engine pre-ignition. Furthermore, this invention is not limited to the position and shape of multiple cylinders in the engine for cylinder compression ratio adjustment; in other words, it is still applicable to engines with asymmetrical cylinder block structures, meaning the adjustment method provided by this invention has a wider range of applications.

[0049] Example 2

[0050] Figure 3 This is a schematic flowchart of a method for adjusting the compression ratio of an engine according to Embodiment 2 of the present invention. (Refer to...) Figure 3As shown, this second embodiment refines the above embodiment, specifically detailing how to determine the adjusted compression ratio. In this embodiment, the method specifically includes the following steps:

[0051] S210, Obtain the pre-ignition frequency of the cylinder block at the initial compression ratio.

[0052] S220, the cylinder block with the highest pre-ignition frequency at the initial compression ratio is the first cylinder block.

[0053] S230. Calculate the adjustment compression ratio that the first cylinder needs to be reduced at the initial compression ratio. The reduced compression ratio is the first adjustment compression ratio.

[0054] S240: Obtain the first adjusted pre-ignition frequency of the first cylinder block under the first adjusted compression ratio.

[0055] For example, the compression ratio of the first cylinder block can be modeled and simulated to meet preset conditions. Further, based on the calculation results, the compression ratio is gradually reduced from the initial compression ratio. Since the reduced compression ratio may not reach the preset requirement immediately, the reduced compression ratio is determined as the first adjusted compression ratio, and the pre-ignition frequency of the first cylinder block is then determined at the first adjusted compression ratio. The determined pre-ignition frequency is the first adjusted pre-ignition frequency.

[0056] S250: Determine whether the first pre-ignition frequency is less than or equal to the preset frequency. If yes, proceed to S260; otherwise, proceed to S230.

[0057] Specifically, it is determined whether the first adjusted pre-ignition frequency is less than or equal to the preset frequency. If so, it proves that the adjusted first adjusted compression ratio can ensure the working stability of the first cylinder block and ensure that the number of pre-ignitions sent meets the requirements. In this case, there is no need to adjust the compression ratio of the first cylinder block further, and the first adjusted compression ratio is directly the first compression ratio. If not, it proves that the pre-ignition frequency of the first cylinder block is still too high under the first adjusted compression ratio. In this case, the simulation calculation results need to be further determined. Therefore, S230 is executed again for new calculation. Multiple calculations can ensure that the pre-ignition frequency of the first cylinder block meets the requirements.

[0058] S260, the first adjusted compression ratio is the first compression ratio.

[0059] S270. Calculate the adjustment compression ratio that needs to be increased for all cylinders except the first cylinder under the first compression ratio. The increased compression ratio is the second adjustment compression ratio.

[0060] S280: Obtain the second adjusted pre-ignition frequency of the cylinders other than the first cylinder under the second adjusted compression ratio.

[0061] For example, models can be created for all cylinders except the first cylinder, and simulations can be performed to calculate the compression ratios of these cylinders under preset conditions. Further, based on the calculation results, the compression ratio is gradually increased from the first compression ratio. Since the increased compression ratio may not reach the preset requirement immediately, the increased compression ratio is determined as the second adjusted compression ratio. Then, the pre-ignition frequency is determined for all cylinders except the first cylinder under the second adjusted compression ratio; this determined pre-ignition frequency is the second adjusted pre-ignition frequency.

[0062] S290. Determine whether the second pre-ignition frequency is less than or equal to the preset frequency. If yes, execute S2100; otherwise, execute S270.

[0063] Specifically, it is determined whether the second adjusted pre-ignition frequency is less than or equal to the preset frequency. If so, it proves that the adjusted second adjusted compression ratio can ensure the working stability of cylinders other than the first cylinder and ensure that the number of pre-ignitions sent meets the requirements. In this case, there is no need to adjust the compression ratio of cylinders other than the first cylinder, and the second adjusted compression ratio is directly the second compression ratio. If not, it proves that the pre-ignition frequency of cylinders other than the first cylinder is still too high under the second adjusted compression ratio. The simulation calculation results need to be further determined, so S290 is executed again for new calculation. Multiple calculations can ensure that the pre-ignition frequency of cylinders other than the first cylinder meets the requirements. At the same time, it can further ensure that the pre-ignition frequency is appropriate while increasing the compression ratio to ensure overall working efficiency.

[0064] S2100, the second adjustable compression ratio is the second compression ratio.

[0065] In summary, the engine compression ratio adjustment method provided by the embodiments of the present invention refines the dynamic adjustment of the compression ratio of the first cylinder and other cylinders, ensuring that while meeting the overall energy-saving requirements of the engine, it can also prevent engine pre-ignition.

[0066] Example 3

[0067] Figure 4 This is a flowchart illustrating a method for adjusting the engine compression ratio according to Embodiment 3 of the present invention. (Refer to...) Figure 4 This third embodiment refines the above embodiments, specifically detailing how to determine the compression ratio after adjustment of multiple cylinders. In this embodiment, the method specifically includes the following steps:

[0068] S310, Obtain the pre-ignition frequency of the cylinder block at the initial compression ratio.

[0069] S320, the cylinder block with the highest pre-ignition frequency at the initial compression ratio is the first cylinder block.

[0070] Furthermore, the compression ratio of all cylinders except the first cylinder is increased sequentially from high to low according to the initial pre-ignition frequency.

[0071] Specifically, after the compression ratio of the first cylinder is redefined, the compression ratios of the remaining cylinders can also be determined one by one. While ensuring the pre-ignition frequency meets the requirements, the compression ratios of different cylinders are further increased to guarantee the overall engine performance. Since the pre-ignition frequencies of different cylinders differ, the compression ratio increased from the initial compression ratio will also differ. The specific implementation process is as follows:

[0072] S330, control the compression ratio of the cylinder block to decrease from the initial compression ratio to the first compression ratio, and the pre-ignition frequency of the first cylinder block at the first compression ratio is less than or equal to the preset frequency.

[0073] S340, controls all cylinders except the first cylinder, including the medium-frequency cylinder and the low-frequency cylinder.

[0074] Furthermore, within the engine block, when tested at the initial compression ratio, the block with the highest pre-ignition frequency is identified as the first cylinder block. Specifically, other cylinder blocks also exhibit differences in pre-ignition frequency. These cylinder blocks can be ordered from highest to lowest pre-ignition frequency, with the middle block being the mid-frequency cylinder block and the end block being the low-frequency cylinder block. It should be noted that if the engine block has only three cylinder blocks, these three cylinder blocks can be designated as the first cylinder block, the mid-frequency cylinder block, and the low-frequency cylinder block. If the engine block has more than three cylinder blocks, the mid-frequency or low-frequency cylinder block can be considered as more than one cylinder block, or a more detailed division can be made based on frequency. This embodiment of the invention does not impose specific limitations on this.

[0075] S350, the compression ratio of the medium-frequency cylinder is adjusted from the first compression ratio to the third compression ratio, and the pre-ignition frequency of the medium-frequency cylinder at the third compression ratio is less than or equal to the preset frequency.

[0076] Specifically, in the initial compression ratio, the pre-ignition frequency of the intermediate frequency cylinder block is slightly lower than that of the first cylinder block, meaning the pre-ignition frequency of the intermediate frequency cylinder block is also relatively high. Based on the first compression ratio adjusted for the first cylinder block, the pre-ignition situation of the intermediate frequency cylinder block will inevitably be effectively controlled. However, the compression ratio can be increased to a third compression ratio based on the first compression ratio. The intermediate frequency cylinder block can still meet the preset requirement for pre-ignition frequency at the third compression ratio, while further ensuring the working efficiency of the intermediate frequency cylinder block, i.e., controlling costs.

[0077] S360, adjust the compression ratio of the low-frequency cylinder block to the fourth compression ratio based on the third compression ratio, and the pre-ignition frequency of the low-frequency cylinder block at the fourth compression ratio is less than or equal to the preset frequency.

[0078] Specifically, in the initial compression ratio, the pre-ignition frequency of the low-frequency cylinder block is slightly lower than that of the medium-frequency cylinder block, meaning the pre-ignition frequency of the low-frequency cylinder block is the lowest. Based on the third compression ratio adjusted for the medium-frequency cylinder block, the pre-ignition situation of the low-frequency cylinder block will inevitably be effectively controlled. However, the compression ratio can be increased to a fourth compression ratio based on the third compression ratio. The low-frequency cylinder block can still meet the preset requirement for pre-ignition frequency at the fourth compression ratio, while further ensuring the working efficiency of the low-frequency cylinder block, i.e., controlling costs.

[0079] In summary, the engine compression ratio adjustment method provided by the embodiments of the present invention further refines the dynamic compression ratio adjustment of multiple cylinders of the engine, ensuring overall engine energy saving while also preventing engine pre-ignition.

[0080] Example 4

[0081] Figure 5 This is a schematic diagram of the structure of an engine compression ratio adjustment device provided in Embodiment 4 of the present invention. The device can be applied to products with engines, and the device can be implemented by software and / or hardware.

[0082] like Figure 5 As shown, the engine compression ratio adjustment device 1 includes: a pre-ignition frequency acquisition module 20, a first cylinder block determination module 30, a first compression ratio determination module 40, and a second compression ratio determination module 50.

[0083] Among them, the pre-ignition frequency acquisition module 20 is used to acquire the pre-ignition frequency of the cylinder block at the initial compression ratio. The pre-ignition frequency refers to the number of pre-ignitions per unit time.

[0084] The first cylinder block determination module 30 is used to control the cylinder block with the highest pre-ignition frequency at the initial compression ratio as the first cylinder block.

[0085] The first compression ratio determination module 40 is used to control the compression ratio of the cylinder block to decrease from the initial compression ratio to the first compression ratio, and the pre-ignition frequency of the first cylinder block at the first compression ratio is less than or equal to a preset frequency.

[0086] The second compression ratio determination module 50 is used to control the compression ratio of cylinders other than the first cylinder to be increased from the first compression ratio to the second compression ratio, and the pre-ignition frequency of cylinders other than the first cylinder at the second compression ratio is less than or equal to a preset frequency.

[0087] In summary, the engine compression ratio adjustment device provided in this embodiment of the invention dynamically adjusts the compression ratio of multiple cylinders of the engine according to their pre-ignition conditions, ensuring overall engine energy efficiency while also preventing engine pre-ignition.

[0088] Example 5

[0089] Figure 6 This is a schematic diagram of the structure of a computer device provided in Embodiment 5 of the present invention, as shown below. Figure 6 As shown, the computing device provided in this embodiment of the invention includes: one or more processors 41 and a storage device 42; the processors 41 in the device may be one or more. Figure 6 Taking a processor 41 as an example; storage device 42 is used to store one or more programs; one or more programs are executed by one or more processors 41, so that one or more processors 41 implement any of the engine compression ratio adjustment methods in the embodiments of the present invention.

[0090] The processor 41, storage device 42, input device 43, and output device 44 in the device can be connected via a bus or other means. Figure 6 Taking the example of a connection between China and Israel via a bus.

[0091] The storage device 42 in this device serves as a computer-readable storage medium and can be used to store one or more programs. These programs can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the fuel cell gas supply flow control method provided in this embodiment of the invention (e.g., such as...). Figure 5 As shown, the engine compression ratio adjustment device 1 includes: a pre-ignition frequency acquisition module 20, a first cylinder block determination module 30, a first compression ratio determination module 40, and a second compression ratio determination module 50. The processor 41 executes various functional applications and data processing of the terminal device by running software programs, instructions, and modules stored in the storage device 42, thereby realizing the engine compression ratio adjustment method in the above method embodiment.

[0092] Storage device 42 may include a stored program area and a stored data area, wherein the stored program area may store the operating system and applications required for at least one function; the stored data area may store data created based on the use of the device, etc. Furthermore, storage device 42 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, storage device 42 may further include memory remotely located relative to processor 41, and this remote memory may be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0093] Input device 43 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the device. Output device 44 may include display devices such as a display screen.

[0094] Furthermore, when one or more programs included in the aforementioned device are executed by one or more processors 41, the programs perform the following operations: acquiring the pre-ignition frequency of the cylinder block at the initial compression ratio, where the pre-ignition frequency refers to the number of pre-ignitions per unit time; controlling the cylinder block with the highest pre-ignition frequency at the initial compression ratio as the first cylinder block; controlling the compression ratio of the cylinder block to decrease from the initial compression ratio to the first compression ratio, and the pre-ignition frequency of the first cylinder block at the first compression ratio is less than or equal to a preset frequency; controlling the compression ratio of the other cylinder blocks except the first cylinder block to increase from the first compression ratio to the second compression ratio, and the pre-ignition frequency of the other cylinder blocks except the first cylinder block at the second compression ratio is less than or equal to a preset frequency.

[0095] Example 6

[0096] Embodiment 6 of the present invention provides a computer-readable storage medium storing a computer program thereon. When executed by a processor, the program is used to perform a method for adjusting the compression ratio of an engine. The method includes: obtaining the pre-ignition frequency of a cylinder block at an initial compression ratio, where the pre-ignition frequency refers to the number of pre-ignitions per unit time; controlling the cylinder block with the highest pre-ignition frequency at the initial compression ratio as a first cylinder block; controlling the compression ratio of the cylinder block to decrease from the initial compression ratio to a first compression ratio, and the pre-ignition frequency of the first cylinder block at the first compression ratio is less than or equal to a preset frequency; controlling the compression ratio of other cylinder blocks (excluding the first cylinder block) to increase from the first compression ratio to a second compression ratio, and the pre-ignition frequency of other cylinder blocks (excluding the first cylinder block) at the second compression ratio is less than or equal to the preset frequency.

[0097] Optionally, when executed by a processor, the program can also be used to execute the engine compression ratio adjustment method provided in any embodiment of the present invention.

[0098] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination thereof. A computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0099] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, apparatus, or device.

[0100] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, radio frequency (RF), etc., or any suitable combination thereof.

[0101] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—as well as conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can 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 can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0102] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method of adjusting the compression ratio of an engine, applied to an engine comprising at least three cylinders, characterized in that, The method comprises the following steps: acquiring early combustion frequency of the cylinder at an initial compression ratio, the early combustion frequency being the number of early combustion per unit time; controlling the cylinder with the maximum early combustion frequency at the initial compression ratio as a first cylinder; controlling the compression ratio of the cylinder to decrease from the initial compression ratio to a first compression ratio, and the early combustion frequency of the first cylinder at the first compression ratio being less than or equal to a preset frequency; controlling the compression ratio of the cylinder other than the first cylinder to increase from the first compression ratio to a second compression ratio, and the early combustion frequency of the cylinder other than the first cylinder at the second compression ratio being less than or equal to a preset frequency; the control of the compression ratio of the cylinder other than the first cylinder to increase from the first compression ratio to a second compression ratio comprises: controlling the cylinder other than the first cylinder to increase the compression ratio one by one from large to small according to the initial early combustion frequency; the cylinder other than the first cylinder comprises a medium frequency cylinder and a low frequency cylinder, the early combustion frequency of the first cylinder is greater than that of the medium frequency cylinder, and the early combustion frequency of the medium frequency cylinder is greater than that of the low frequency cylinder at the initial compression ratio; the medium frequency cylinder and the low frequency cylinder each comprise at least one cylinder; controlling the compression ratio of the medium frequency cylinder to adjust to a third compression ratio on the basis of the first compression ratio, and the early combustion frequency of the medium frequency cylinder at the third compression ratio being less than or equal to a preset frequency; controlling the compression ratio of the low frequency cylinder to adjust to a fourth compression ratio on the basis of the third compression ratio, and the early combustion frequency of the low frequency cylinder at the fourth compression ratio being less than or equal to a preset frequency.

2. The conditioning method of claim 1, wherein, the control of the compression ratio of the cylinder to decrease from the initial compression ratio to a first compression ratio comprises: calculating the adjustment compression ratio of the first cylinder to decrease at the initial compression ratio, the compression ratio after the decrease being a first adjustment compression ratio; acquiring the first adjustment early combustion frequency of the first cylinder at the first adjustment compression ratio; judging whether the first adjustment early combustion frequency is less than or equal to a preset frequency; if yes, the first adjustment compression ratio is the first compression ratio; if no, the adjustment compression ratio is continuously calculated to decrease.

3. The conditioning method of claim 1, wherein, the control of the compression ratio of the cylinder other than the first cylinder to increase from the first compression ratio to a second compression ratio comprises: calculating the adjustment compression ratio of the cylinder other than the first cylinder to increase at the first compression ratio, the compression ratio after the increase being a second adjustment compression ratio; acquiring the second adjustment early combustion frequency of the cylinder other than the first cylinder at the second adjustment compression ratio; judging whether the second adjustment early combustion frequency is less than or equal to a preset frequency; if yes, the second adjustment compression ratio is the second compression ratio; if no, the adjustment compression ratio is continuously calculated to increase.

4. The conditioning method of claim 1, wherein, the cylinder comprises a cylinder accommodating space, a piston and a connecting rod; the piston is arranged in the cylinder accommodating space, and the piston is mechanically connected with the connecting rod; the control of the compression ratio of the cylinder to decrease from the initial compression ratio to a first compression ratio comprises: adjusting the length of the connecting rod of the first cylinder and adjusting the volume of the cylinder accommodating space according to the length of the connecting rod; controlling the compression ratio of the cylinders other than the first cylinder to increase from the first compression ratio to a second compression ratio, comprising: adjusting the length of the connecting rod of the cylinders other than the first cylinder and adjusting the volume of the cylinder accommodating space according to the length of the connecting rod.

5. The conditioning method of claim 1, wherein, acquiring the pre-ignition frequency of the cylinders at an initial compression ratio, comprising: controlling the acquisition of the pre-ignition frequency of all the cylinders of the engine under a unified preset environment.

6. An engine compression ratio adjustment device, applied to an engine, characterized in that, comprising: a pre-ignition frequency acquisition module, configured to acquire the pre-ignition frequency of the cylinders at an initial compression ratio, the pre-ignition frequency being the number of pre-ignitions per unit time; a first cylinder determination module, configured to control the cylinder with the maximum pre-ignition frequency at the initial compression ratio as the first cylinder; a first compression ratio determination module, configured to control the compression ratio of the cylinders to decrease from the initial compression ratio to a first compression ratio, and the pre-ignition frequency of the first cylinder at the first compression ratio being less than or equal to a preset frequency; a second compression ratio determination module, configured to control the compression ratio of the cylinders other than the first cylinder to increase from the first compression ratio to a second compression ratio, and the pre-ignition frequency of the cylinders other than the first cylinder at the second compression ratio being less than or equal to a preset frequency; the control of the compression ratio of the cylinders other than the first cylinder to increase from the first compression ratio to a second compression ratio, comprising: controlling the cylinders other than the first cylinder to increase the compression ratio one by one from large to small according to the initial pre-ignition frequency; controlling the cylinders other than the first cylinder to include a medium frequency cylinder and a low frequency cylinder, the pre-ignition frequency of the first cylinder being greater than that of the medium frequency cylinder, and the pre-ignition frequency of the medium frequency cylinder being greater than that of the low frequency cylinder at the initial compression ratio; the medium frequency cylinder and the low frequency cylinder each including at least one cylinder; controlling the compression ratio of the medium frequency cylinder to adjust to a third compression ratio based on the first compression ratio, and the pre-ignition frequency of the medium frequency cylinder at the third compression ratio being less than or equal to a preset frequency; controlling the compression ratio of the low frequency cylinder to adjust to a fourth compression ratio based on the third compression ratio, and the pre-ignition frequency of the low frequency cylinder at the fourth compression ratio being less than or equal to a preset frequency.

7. A computer device, comprising: the computer device comprising: one or more processors; a storage device configured to store one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the engine compression ratio adjustment method of any one of claims 1-5.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the engine compression ratio adjustment method of any one of claims 1-5.

Images