Method and system for correcting fuel injection quantity of engine, vehicle and equipment
By obtaining the oxygen storage capacity and quantity of the three-way catalytic converter, calculating the oxygen storage difference and factor, and correcting the fuel injection quantity, the problem of insufficient fuel injection quantity control accuracy and response speed is solved, thereby improving the engine's emissions and fuel consumption performance.
Patent Information
- Application Number
- CN202511772229.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-02-13
AI Technical Summary
In current engine fuel injection quantity control, the oxygen storage capacity of the three-way catalytic converter is not fully utilized, resulting in insufficient fuel injection quantity control accuracy and response speed, which affects vehicle emissions and fuel consumption performance.
By obtaining the oxygen storage capacity and amount of the three-way catalytic converter, the oxygen storage difference and factor are calculated. The fuel injection quantity is then corrected using the oxygen storage factor, thereby improving the response speed of fuel injection quantity control and reducing overshoot.
It improves the overall vehicle's emissions and fuel efficiency, and reduces emissions and energy consumption.
Smart Images
Figure CN121520085A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vehicles, in particular to an engine fuel injection amount correction method, system, vehicle and equipment. BACKGROUND
[0002] In order to control the gas emission pollutants of the engine, each host factory generally adopts a technical solution of air-fuel ratio feedback strategy and three-way catalyst combination, as shown in Figure 5 Air-fuel ratio feedback is a very important control strategy in the engine electronic control system, which has an important influence on the emission and fuel consumption of the vehicle. The current system solution is to install one oxygen sensor before and after the three-way catalyst. The front oxygen sensor is a linear oxygen sensor, and the excess air coefficient (lambda) measurement range is 0.65~2.5. The rear oxygen sensor is a switching oxygen sensor, and the excess air coefficient measurement range is 0.9~1.1. The three-way catalyst can not only efficiently convert the gas pollutants (CO, NOx, HC) generated by the mixture with lambda of 1 into CO2 and H2O, but also has a certain oxygen storage capacity (Oxygen Storage Capacity, hereinafter referred to as OSC). Therefore, it is only necessary to control the lambda within a certain window, that is, to efficiently purify the gas pollutants. The size of the window is related to the OSC of the three-way catalyst.
[0003] The current control strategy is as shown in Figure 6 Generally, a PI controller is used to correct the fuel injection amount according to the deviation between the target lambda and the measured lambda, so as to control the measured lambda to the target. The proportional coefficient Kp and the integral coefficient Ki are calculated according to the operating conditions (speed, load) of the engine. The calculation of Kp and Ki does not consider the oxygen storage capacity (Oxygen Storage, hereinafter referred to as OS) of the catalyst. Therefore, the control accuracy and response speed accuracy of the fuel injection amount are poor, which further affects the emission and fuel consumption performance of the vehicle. SUMMARY
[0004] Therefore, it is necessary to provide an engine fuel injection amount correction method, system, vehicle and equipment, which fully utilizes the performance of the three-way catalyst, improves the response speed in the fuel injection amount control, reduces the overshoot, and further improves the emission and fuel consumption of the vehicle, and effectively reduces the emission and energy consumption.
[0005] In a first aspect, an engine fuel injection amount correction method is provided, comprising: obtaining the oxygen storage capacity value and the oxygen storage amount of the three-way catalyst; obtaining the oxygen storage difference value between the oxygen storage capacity value and the oxygen storage amount of the three-way catalyst according to the oxygen storage capacity value and the oxygen storage amount of the three-way catalyst; The oxygen storage factor is determined based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter. Obtain the deviation between the target excess air coefficient and the actual excess air coefficient; The fuel injection quantity of the engine is corrected based on the deviation and the oxygen storage factor.
[0006] In some examples, determining the oxygen storage factor based on the oxygen storage capacity value and the oxygen storage amount difference of the three-way catalytic converter includes: Based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter, a pre-stored oxygen storage factor table is consulted to obtain the oxygen storage factor corresponding to the oxygen storage difference. The oxygen storage factor table includes multiple oxygen storage differences and oxygen storage factors that correspond one-to-one with the multiple oxygen storage differences.
[0007] In some examples, it also includes: Multiple oxygen storage differences and oxygen storage factors corresponding to these multiple oxygen storage differences were determined through experiments. Based on the determined multiple oxygen storage differences and the oxygen storage factors that correspond one-to-one with the multiple oxygen storage differences, the oxygen storage factor table is calibrated.
[0008] In some examples, correcting the engine's fuel injection quantity based on the deviation and the oxygen storage factor includes: Based on the deviation, the base fuel injection quantity of the engine is obtained; The base fuel injection quantity is corrected based on the oxygen storage factor to obtain the final fuel injection quantity.
[0009] In some examples, the step of correcting the base fuel injection quantity based on the oxygen storage factor to obtain the final fuel injection quantity includes: The injection adjustment amount is obtained based on the oxygen storage factor and the base injection amount; If the oxygen storage factor is positive, the base fuel injection quantity is adjusted negatively according to the fuel injection adjustment quantity to obtain the final fuel injection quantity; If the oxygen storage factor is negative, the base fuel injection quantity is adjusted positively according to the fuel injection adjustment quantity to obtain the final fuel injection quantity.
[0010] In some examples, after correcting the engine's fuel injection quantity based on the deviation and the oxygen storage factor, the method further includes: The engine is fuel injection controlled according to the corrected fuel injection quantity.
[0011] In some examples, the actual excess air coefficient is measured by the pre-oxygen sensor of the three-way catalytic converter.
[0012] Secondly, an engine fuel injection quantity correction system is provided, comprising: The acquisition module is used to obtain the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter. The calculation module is used to obtain the oxygen storage difference between the oxygen storage capacity value and the oxygen storage amount of the three-way catalytic converter based on the oxygen storage capacity value and the oxygen storage amount of the three-way catalytic converter. The correction module is used to determine the oxygen storage factor based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter, obtain the deviation between the target excess air coefficient and the actual excess air coefficient, and correct the fuel injection quantity of the engine based on the deviation and the oxygen storage factor.
[0013] Thirdly, a vehicle is provided, comprising: an engine fuel injection quantity correction system according to the second aspect described above.
[0014] Fourthly, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the steps of the engine fuel injection quantity correction method described in the first aspect and any possible implementation thereof.
[0015] Fifthly, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the engine fuel injection quantity correction method of the first aspect and any possible implementation thereof.
[0016] In a sixth aspect, a computer program product is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the engine fuel injection quantity correction method of the first aspect and any possible implementation thereof.
[0017] The embodiments of this application introduce the difference between the oxygen storage capacity and oxygen storage ability of the three-way catalytic converter into the fuel injection quantity control process based on air-fuel ratio feedback. Therefore, when the excess air coefficient deviation is positive, the mixture is rich, fuel injection is reduced, and an oxygen storage factor is calculated based on the difference between the oxygen storage capacity and oxygen storage ability, which is then incorporated into the fuel injection quantity correction. When the excess air coefficient deviation is negative, the mixture is lean, fuel injection is increased, and an oxygen storage factor is calculated based on the difference between the oxygen storage capacity and oxygen storage ability, which is also incorporated into the fuel injection quantity correction. Thus, the performance of the three-way catalytic converter can be fully utilized, improving the response speed in fuel injection quantity control, reducing overshoot, and thereby improving overall vehicle emissions and fuel consumption, effectively reducing emissions and energy consumption. Attached Figure Description
[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A flowchart illustrating the method for correcting the fuel injection quantity of an engine provided in an embodiment of this application; Figure 2 This is a schematic diagram illustrating the execution of the fuel injection quantity correction method for an engine provided in an embodiment of this application. Figure 3 A structural block diagram of the fuel injection quantity correction system for an engine provided in an embodiment of this application; Figure 4 Structural block diagram of the computer device provided in the embodiments of this application; Figure 5 This is a schematic diagram of an air-fuel ratio feedback control system. Figure 6 This is a schematic diagram of an existing air-fuel ratio feedback control strategy. Detailed Implementation
[0019] The present application will now be described in further detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the application. Furthermore, it should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings.
[0020] It should be noted that, unless otherwise specified, the embodiments and features of the embodiments in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0021] The following describes in detail, with reference to the accompanying drawings, an engine fuel injection quantity correction method, system, vehicle, and device according to embodiments of this application.
[0022] Figure 1 This is a flowchart of an engine fuel injection quantity correction method according to an embodiment of this application. Figure 1 As shown, the fuel injection quantity correction method for an engine according to an embodiment of this application includes the following steps: S101: Obtain the oxygen storage capacity and oxygen storage amount of the three-way catalytic converter.
[0023] S102: Based on the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter, obtain the oxygen storage difference between the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter.
[0024] S103: Determine the oxygen storage factor based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter.
[0025] In one embodiment of this application, determining an oxygen storage factor based on the oxygen storage capacity value and the oxygen storage amount difference of the three-way catalytic converter includes: querying a pre-stored oxygen storage factor table based on the oxygen storage capacity value and the oxygen storage amount difference of the three-way catalytic converter to obtain an oxygen storage factor corresponding to the oxygen storage difference value, wherein the oxygen storage factor table includes multiple oxygen storage differences and oxygen storage factors corresponding one-to-one with the multiple oxygen storage differences.
[0026] The oxygen storage factor table is pre-calibrated. Specifically, multiple oxygen storage differences and corresponding oxygen storage factors are determined experimentally. The oxygen storage factor table is then calibrated based on the determined multiple oxygen storage differences and corresponding oxygen storage factors.
[0027] S104: Obtain the deviation between the target excess air coefficient and the actual excess air coefficient.
[0028] The actual excess air coefficient is obtained by measuring the oxygen sensor before the three-way catalytic converter.
[0029] S105: Correct the fuel injection quantity of the engine based on the deviation amount and the oxygen storage factor.
[0030] In one embodiment of this application, the fuel injection quantity of the engine is corrected based on the deviation amount and the oxygen storage factor, including: obtaining the basic fuel injection quantity of the engine based on the deviation amount; and correcting the basic fuel injection quantity based on the oxygen storage factor to obtain the final fuel injection quantity.
[0031] In this example, the base fuel injection quantity is corrected according to the oxygen storage factor to obtain the final fuel injection quantity, including: obtaining a fuel injection adjustment amount according to the oxygen storage factor and the base fuel injection quantity; if the oxygen storage factor is positive, the base fuel injection quantity is negatively adjusted according to the fuel injection adjustment amount to obtain the final fuel injection quantity; if the oxygen storage factor is negative, the base fuel injection quantity is positively adjusted according to the fuel injection adjustment amount to obtain the final fuel injection quantity.
[0032] Furthermore, after correcting the fuel injection quantity of the engine based on the deviation amount and the oxygen storage factor, the method further includes: performing fuel injection control on the engine based on the corrected fuel injection quantity.
[0033] Combination Figure 2As shown in the embodiments of this application, the state of the three-way catalytic converter is introduced into the fuel injection quantity control process based on air-fuel ratio feedback, namely: oxygen storage quantity OS. The difference between oxygen storage capacity OSC and oxygen storage quantity OS characterizes the current ability of the three-way catalytic converter to handle lean mixtures, while OS characterizes the current ability of the three-way catalytic converter to handle rich mixtures. When the excess air coefficient lambda deviation is positive, the mixture is rich, and fuel injection is reduced. The OS factor is calculated based on the difference between OSC and OS, and multiplied by the sum of the P and I terms of the PI controller. When the excess air coefficient lambda deviation is negative, the mixture is lean, and fuel injection is increased. The OS factor is calculated based on the OS value. This can fully utilize the performance of the three-way catalytic converter, improve the response speed of the PI controller, reduce overshoot, and thus improve the vehicle's emissions and fuel consumption.
[0034] When the excess air coefficient lambda deviation is positive, the fuel is adjusted negatively. The difference between OSC and OS is used to look up the oxygen storage factor in Table 1, as shown in Table 1. Table 1
[0035] When the excess air coefficient lambda deviation is negative, the fuel is adjusted positively, and the oxygen storage factor (Fosc) is obtained by referring to Table 1 based on the OS. The oxygen storage factor (Fosc) is then incorporated into the calculation of the fuel injection quantity. Table 1 can be pre-calibrated; for example, Table 1 in Table 1 uses the default value.
[0036] According to the fuel injection quantity correction method for an engine according to embodiments of this application, the difference between the oxygen storage quantity and oxygen storage capacity of the three-way catalytic converter is introduced into the fuel injection quantity control process based on air-fuel ratio feedback. Therefore, when the excess air coefficient deviation is positive, the air-fuel mixture is rich, fuel injection is reduced, and an oxygen storage factor is calculated based on the difference between the oxygen storage quantity and oxygen storage capacity, which is then incorporated into the fuel injection quantity correction. When the excess air coefficient deviation is negative, the air-fuel mixture is lean, fuel injection is increased, and an oxygen storage factor is calculated based on the difference between the oxygen storage quantity and oxygen storage capacity, which is also incorporated into the fuel injection quantity correction. Therefore, the performance of the three-way catalytic converter can be fully utilized, the response speed in fuel injection quantity control can be improved, overshoot can be reduced, thereby improving overall vehicle emissions and fuel consumption, and effectively reducing emissions and energy consumption.
[0037] Figure 3 This is a structural block diagram of an engine fuel injection quantity correction system according to an embodiment of this application. Figure 3 As shown, the engine fuel injection quantity correction system according to an embodiment of this application includes: an acquisition module 310, a calculation module 320, and a correction module 330, wherein: The acquisition module 310 is used to obtain the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter. The calculation module 320 is used to obtain the oxygen storage difference between the oxygen storage capacity value and the oxygen storage amount of the three-way catalytic converter based on the oxygen storage capacity value and the oxygen storage amount of the three-way catalytic converter. The correction module 330 is used to determine the oxygen storage factor based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter, obtain the deviation between the target excess air coefficient and the actual excess air coefficient, and correct the fuel injection quantity of the engine based on the deviation and the oxygen storage factor.
[0038] The fuel injection quantity correction system for the engine according to embodiments of this application introduces the difference between the oxygen storage quantity and oxygen storage capacity of the three-way catalytic converter in the fuel injection quantity control process based on air-fuel ratio feedback. Therefore, when the excess air coefficient deviation is positive, the air-fuel mixture is rich, fuel injection is reduced, and an oxygen storage factor is calculated based on the difference between the oxygen storage quantity and oxygen storage capacity, which is then incorporated into the fuel injection quantity correction. When the excess air coefficient deviation is negative, the air-fuel mixture is lean, fuel injection is increased, and an oxygen storage factor is calculated based on the difference between the oxygen storage quantity and oxygen storage capacity, which is also incorporated into the fuel injection quantity correction. Therefore, the performance of the three-way catalytic converter can be fully utilized, improving the response speed in fuel injection quantity control, reducing overshoot, and thus improving overall vehicle emissions and fuel consumption, effectively reducing emissions and energy consumption.
[0039] Specific limitations regarding the engine's fuel injection quantity correction system can be found in the above-described limitations of the engine's fuel injection quantity correction method, and will not be repeated here. Each module of the aforementioned engine's fuel injection quantity correction system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the computer device's memory in software form, so that the processor can call and execute the corresponding operations of each module.
[0040] In one embodiment, a vehicle is provided, comprising: an engine injection quantity correction system according to any of the above embodiments, wherein the vehicle introduces the difference between the oxygen storage quantity and oxygen storage capacity of the three-way catalytic converter during the fuel injection quantity control process based on air-fuel ratio feedback. Thus, when the excess air coefficient deviation is positive, the air-fuel mixture is rich, fuel injection is reduced, and an oxygen storage factor is calculated based on the difference between the oxygen storage quantity and oxygen storage capacity, and participates in the fuel injection quantity correction. When the excess air coefficient deviation is negative, the air-fuel mixture is lean, fuel injection is increased, and an oxygen storage factor is calculated based on the difference between the oxygen storage quantity and oxygen storage capacity, and participates in the fuel injection quantity correction. Therefore, the performance of the three-way catalytic converter can be fully utilized, the response speed in fuel injection quantity control can be improved, overshoot can be reduced, thereby improving the vehicle's emissions and fuel consumption, and effectively reducing emissions and energy consumption.
[0041] Furthermore, other components and functions of the vehicle according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.
[0042] In one embodiment, a computer device is provided. Figure 4 This is a structural block diagram of the computer device provided in the embodiments of this application, with reference to... Figure 4 The computer device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the aforementioned embodiment of the engine fuel injection quantity correction method. For example, it executes: obtaining the oxygen storage capacity value and oxygen storage quantity of the three-way catalytic converter; Based on the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter, the oxygen storage difference between the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter is obtained. The oxygen storage factor is determined based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter. Obtain the deviation between the target excess air coefficient and the actual excess air coefficient; The fuel injection quantity of the engine is corrected based on the deviation and the oxygen storage factor.
[0043] This application also provides a computer-readable storage medium storing a computer program. When the processor executes the computer program, it implements the aforementioned embodiment of the engine fuel injection quantity correction method. For example, it executes: obtaining the oxygen storage capacity value and oxygen storage quantity of the three-way catalytic converter; Based on the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter, the oxygen storage difference between the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter is obtained. The oxygen storage factor is determined based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter. Obtain the deviation between the target excess air coefficient and the actual excess air coefficient; The fuel injection quantity of the engine is corrected based on the deviation and the oxygen storage factor.
[0044] This application provides a computer program product including instructions that, when executed, cause the method described in this application embodiment to be performed. For example, it can execute... Figure 1 The steps of the fuel injection quantity correction method for the engine shown are, for example, performed as follows: Obtain the oxygen storage capacity and oxygen storage amount of the three-way catalytic converter; Based on the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter, the oxygen storage difference between the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter is obtained. The oxygen storage factor is determined based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter. Obtain the deviation between the target excess air coefficient and the actual excess air coefficient; The fuel injection quantity of the engine is corrected based on the deviation and the oxygen storage factor.
[0045] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.
[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0047] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A method for correcting the fuel injection quantity of an engine, characterized in that, include: Obtain the oxygen storage capacity and oxygen storage amount of the three-way catalytic converter; Based on the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter, the oxygen storage difference between the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter is obtained. The oxygen storage factor is determined based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter. Obtain the deviation between the target excess air coefficient and the actual excess air coefficient; The fuel injection quantity of the engine is corrected based on the deviation and the oxygen storage factor.
2. The method for correcting the fuel injection quantity of an engine according to claim 1, characterized in that, The step of determining the oxygen storage factor based on the oxygen storage capacity value and the oxygen storage amount difference between the three-way catalytic converter includes: Based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter, a pre-stored oxygen storage factor table is consulted to obtain the oxygen storage factor corresponding to the oxygen storage difference. The oxygen storage factor table includes multiple oxygen storage differences and oxygen storage factors that correspond one-to-one with the multiple oxygen storage differences.
3. The method for correcting the fuel injection quantity of an engine according to claim 2, characterized in that, Also includes: Multiple oxygen storage differences and oxygen storage factors corresponding to these multiple oxygen storage differences were determined through experiments. Based on the determined multiple oxygen storage differences and the oxygen storage factors that correspond one-to-one with the multiple oxygen storage differences, the oxygen storage factor table is calibrated.
4. The method for correcting the fuel injection quantity of an engine according to claim 1, characterized in that, The step of correcting the engine's fuel injection quantity based on the deviation and the oxygen storage factor includes: Based on the deviation, the base fuel injection quantity of the engine is obtained; The base fuel injection quantity is corrected based on the oxygen storage factor to obtain the final fuel injection quantity.
5. The method for correcting the fuel injection quantity of an engine according to claim 4, characterized in that, The step of correcting the base fuel injection quantity based on the oxygen storage factor to obtain the final fuel injection quantity includes: The injection adjustment amount is obtained based on the oxygen storage factor and the base injection amount; If the oxygen storage factor is positive, the base fuel injection quantity is adjusted negatively according to the fuel injection adjustment quantity to obtain the final fuel injection quantity; If the oxygen storage factor is negative, the base fuel injection quantity is adjusted positively according to the fuel injection adjustment quantity to obtain the final fuel injection quantity.
6. The method for correcting the fuel injection quantity of an engine according to any one of claims 1-5, characterized in that, After correcting the engine's fuel injection quantity based on the deviation and the oxygen storage factor, the method further includes: The engine is fuel injection controlled according to the corrected fuel injection quantity.
7. The method for correcting the fuel injection quantity of an engine according to claim 1, characterized in that, The actual excess air coefficient is measured by the oxygen sensor in front of the three-way catalytic converter.
8. A fuel injection quantity correction system for an engine, characterized in that, include: The acquisition module is used to obtain the oxygen storage capacity value and oxygen storage amount of the three-way catalytic converter. The calculation module is used to obtain the oxygen storage difference between the oxygen storage capacity value and the oxygen storage amount of the three-way catalytic converter based on the oxygen storage capacity value and the oxygen storage amount of the three-way catalytic converter. The correction module is used to determine the oxygen storage factor based on the oxygen storage capacity value and the oxygen storage difference between the three-way catalytic converter, obtain the deviation between the target excess air coefficient and the actual excess air coefficient, and correct the fuel injection quantity of the engine based on the deviation and the oxygen storage factor.
9. A vehicle, characterized in that, include: The fuel injection quantity correction system for the engine according to claim 8.
10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the fuel injection quantity correction method for the engine according to any one of claims 1-7.