CN111852677A - Engine fuel injection quantity control method, device, device and system - Google Patents

Abstract

The invention discloses a method for controlling the fuel injection quantity of an engine, comprising: acquiring a current CO concentration value in exhaust gas discharged from an engine exhaust pipe measured by an exhaust gas analyzer; and judging whether the current CO concentration value is greater than a preset reference value ; When the current CO concentration value is greater than the reference value, adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine; wherein, the adjustment of the electric motor and the fuel injection quantity regulator The knob is connected; when the current CO concentration value is less than the reference value, the operating parameters of the electric motor are adjusted to control the fuel injection quantity regulator to increase the fuel injection quantity of the engine. The invention also discloses an engine fuel injection quantity control device, equipment and system. By adopting the embodiments of the present invention, the control precision and efficiency of the fuel injection quantity of the engine can be improved, and human resources can be saved.

Description

Engine fuel injection quantity control method, device, device and system

technical field

The present invention relates to the technical field of engine control, and in particular, to a method, device, device and system for controlling the fuel injection quantity of an engine.

Background technique

The amount of engine fuel injection can be analyzed by the CO concentration in the engine exhaust; when the CO concentration in the engine exhaust is too large, it indicates that the engine fuel injection amount is too large at this time; when the CO concentration in the exhaust gas is too small, it indicates that the engine fuel injection at this time Quantity is low. At present, during the performance test of the engine, according to the national standard and test specifications, the exhaust gas of the engine needs to be taken out of the exhaust gas analyzer outside the laboratory for measurement, and the CO concentration in the exhaust gas analyzer is checked by the tester, and the fuel injection amount of the engine is adjusted manually. The existing method of measuring CO concentration is usually completed by manual measurement. The exhaust gas of the engine is led out of the test chamber through a long conduit, and the concentration of CO in the exhaust gas is measured by an exhaust gas analyzer, and the fuel injection amount regulator of the engine is manually operated according to the concentration of CO to change the engine fuel injection. quantity.

During the performance test of the engine, due to the need to manually read the CO concentration in the exhaust gas analyzer in real time, the exhaust gas analyzer needs to be placed next to the console, and the engine exhaust gas is led out of the laboratory through a long conduit (>5m) for measurement. Catheter lead-out measurement has low measurement accuracy, long response time, and time-consuming; manual operation of the fuel injection quantity regulator leads to low accuracy of one-time adjustment, requires multiple adjustments, and consumes a lot of man-hours; instrument operation requires manual completion, resulting in measurement data The accuracy of the adjustment is low, the data fluctuates greatly, and it takes a long time.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide an engine fuel injection quantity control method, device, equipment and system, which can improve the control precision and efficiency of the engine fuel injection quantity and save human resources.

In order to achieve the above purpose, an embodiment of the present invention provides a method for controlling the fuel injection quantity of an engine, including:

Obtain the current CO concentration value in the exhaust gas discharged from the engine exhaust pipe measured by the exhaust gas analyzer;

judging whether the current CO concentration value is greater than a preset reference value;

When the current CO concentration value is greater than the reference value, adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine; wherein, the electric motor and the adjustment knob of the fuel injection quantity regulator connect;

When the current CO concentration value is less than the reference value, the operating parameters of the electric motor are adjusted to control the fuel injection quantity regulator to increase the fuel injection quantity of the engine.

As an improvement of the above-mentioned solution, after obtaining the current CO concentration value in the exhaust gas discharged from the engine exhaust pipe measured by the exhaust gas analyzer, the method further includes:

When the current CO concentration value is within a preset threshold range, the solenoid valve is closed; wherein, the solenoid valve is arranged between the exhaust gas analyzer and the exhaust pipe of the engine.

As an improvement of the above solution, the operating parameters of the electric motor include the rotation direction of the electric motor, and the rotation direction includes clockwise rotation and counterclockwise rotation; wherein,

When the current CO concentration value is greater than the reference value, the electric motor rotates counterclockwise to drive the adjustment knob of the fuel injection quantity regulator to rotate counterclockwise;

When the current CO concentration value is less than the reference value, the electric motor rotates clockwise to drive the adjusting knob of the fuel injection quantity adjuster to rotate clockwise.

As an improvement of the above solution, the operating parameters of the electric motor further include the rotation time of the electric motor, and the rotation time is adjusted according to a preset PID algorithm.

In order to achieve the above purpose, an embodiment of the present invention also provides an engine fuel injection quantity control device, including:

The CO concentration value acquisition unit is used to obtain the current CO concentration value in the exhaust gas discharged from the exhaust pipe of the engine measured by the exhaust gas analyzer;

A CO concentration value calculation unit, configured to determine whether the current CO concentration value is greater than a preset reference value;

The fuel injection quantity adjustment unit is used for adjusting the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine when the current CO concentration value is greater than the reference value; is connected to the adjusting knob of the fuel injection quantity regulator; and is also used to adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to increase the engine fuel injection quantity when the current CO concentration value is less than the reference value.

As an improvement of the above solution, the engine fuel injection quantity control device further includes:

A solenoid valve control unit, configured to close the solenoid valve when the current CO concentration value is within a preset threshold value range; wherein the solenoid valve is arranged between the exhaust gas analyzer and the engine exhaust pipe.

As an improvement of the above solution, the operating parameters of the electric motor include the rotation direction of the electric motor, and the rotation direction includes clockwise rotation and counterclockwise rotation; wherein,

When the current CO concentration value is greater than the reference value, the electric motor rotates counterclockwise to drive the adjustment knob of the fuel injection quantity regulator to rotate counterclockwise;

When the current CO concentration value is less than the reference value, the electric motor rotates clockwise to drive the adjusting knob of the fuel injection quantity adjuster to rotate clockwise.

As an improvement of the above solution, the operating parameters of the electric motor further include the rotation time of the electric motor, and the rotation time is adjusted according to a preset PID algorithm.

To achieve the above object, an embodiment of the present invention also provides an engine fuel injection quantity control device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processing When the computer executes the computer program, the engine fuel injection quantity control method according to any one of the above embodiments is implemented.

In order to achieve the above object, an embodiment of the present invention also provides an engine fuel injection quantity control system, which is characterized in that it includes an exhaust gas analyzer, an electric motor, a fuel injection quantity regulator, and the engine fuel injection quantity described in any of the above embodiments. control device.

Compared with the prior art, in the method, device, device and system for controlling the fuel injection quantity of an engine disclosed in the embodiments of the present invention, first, the current CO concentration value is obtained; then, it is determined whether the current CO concentration value is greater than the preset reference value; finally , when the current CO concentration value is greater than the reference value, adjust the operating parameters of the electric motor to reduce the fuel injection amount of the engine; when the current CO concentration value is less than the reference value, adjust the operating parameters of the electric motor to increase the engine fuel injection amount. Because in the process of judging whether the current CO concentration value is greater than the preset reference value, the degree measured by the exhaust gas analyzer is compared with the reference value, so there is no need to manually judge whether the current CO concentration value is too rich or too low, saving human resources; , When the current CO concentration value is too rich or too low, by adjusting the operating parameters of the electric motor to control the adjustment knob of the fuel injection quantity regulator, so as to increase or decrease the fuel injection quantity of the engine accordingly, which can improve the control of the fuel injection quantity of the engine Accuracy and efficiency, saving human resources.

Description of drawings

FIG. 1 is a flowchart of a method for controlling fuel injection quantity of an engine provided by an embodiment of the present invention;

2 is a flowchart of a host computer algorithm provided by an embodiment of the present invention;

Fig. 3 is the CO concentration algorithm flow chart provided by the embodiment of the present invention;

4 is a flowchart of an electric motor algorithm provided by an embodiment of the present invention;

5 is a structural block diagram of an engine fuel injection quantity control device provided by an embodiment of the present invention;

6 is a structural block diagram of an engine fuel injection quantity control device provided by an embodiment of the present invention;

FIG. 7 is a structural block diagram of an engine fuel injection quantity control system provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIG. 1, FIG. 1 is a flowchart of an engine fuel injection quantity control method provided by an embodiment of the present invention; the engine fuel injection quantity control method includes:

S1. Obtain the current CO concentration value in the exhaust gas discharged from the engine exhaust pipe measured by the exhaust gas analyzer;

S2, judging whether the current CO concentration value is greater than a preset reference value;

S3. When the current CO concentration value is greater than the reference value, adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine;

S4. When the current CO concentration value is less than the reference value, adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to increase the fuel injection quantity of the engine.

It is worth noting that the method for controlling the fuel injection quantity of an engine according to the embodiment of the present invention can be executed by an on-board terminal, and the on-board terminal includes a PC (host computer) for visually displaying data and a computer for processing the data. Single chip microcomputer, the on-board terminal is the front-end equipment of the vehicle monitoring and management system, which integrates multiple functions such as data processing and data communication, and has powerful business scheduling functions and data processing capabilities.

Specifically, in step S1, the exhaust gas analyzer is used to analyze the composition and content of the exhaust gas introduced into the exhaust pipe of the engine. In the embodiment of the present invention, the exhaust gas analyzer adopts the Nanhua NHA-506 type instrument. The process of obtaining the current CO concentration value can refer to Figure 2. This process can be implemented by the host computer. First, the exhaust gas analyzer is initialized, the serial port is judged and selected, and then the measurement command is sent to the exhaust gas analyzer to enter the exhaust gas measurement state. , in this process, the flag bit is judged, and finally the data returned by the exhaust gas analysis is screened and displayed.

Further, after obtaining the current CO concentration value in the exhaust gas discharged from the exhaust pipe of the engine measured by the exhaust gas analyzer, the method further includes:

When the current CO concentration value is within a preset threshold range, the solenoid valve is closed; wherein, the solenoid valve is arranged between the exhaust gas analyzer and the exhaust pipe of the engine. Exemplarily, a normally open solenoid valve is installed in the conduit connecting the exhaust gas analyzer and the engine exhaust pipe.

Specifically, in step S2, it is determined whether the current CO concentration value is greater than a preset reference value. Exemplarily, the reference value may be set in advance according to the actual situation, which is not specifically limited herein.

Exemplarily, the CO concentration algorithm can refer to FIG. 3, first send a measurement instruction to the exhaust gas analyzer, then receive the CO concentration data measured by the exhaust gas analyzer, perform secondary stability calculation and data stability judgment, and finally The current CO concentration value is output. The k in the figure is the reference value.

Specifically, in steps S3 to S4, the electric motor and the adjustment knob of the fuel injection quantity regulator are connected by gear meshing, and the electric motor rotates while driving the adjustment knob to rotate, thereby realizing the fuel injection Adjustment of the volume regulator.

Optionally, the operating parameter of the electric motor includes a rotation direction of the electric motor, and the rotation direction includes clockwise rotation and counterclockwise rotation; wherein, when the current CO concentration value is greater than the reference value, the electric motor The motor rotates counterclockwise to drive the adjustment knob of the fuel injection quantity regulator to rotate counterclockwise, and the fuel injection quantity regulator reduces the fuel injection quantity of the engine at this time; when the current CO concentration value is less than the reference value, the The electric motor rotates clockwise to drive the adjusting knob of the fuel injection quantity regulator to rotate clockwise, and the fuel injection quantity regulator increases the fuel injection quantity of the engine at this time.

Optionally, the operating parameters of the electric motor also include the rotation time of the electric motor, and the rotation time is adjusted according to a preset PID algorithm. Referring to FIG. 4 , e(k) is the current CO concentration value and the reference value. The difference between the values, e(k-1) is the difference between the last CO concentration value and the reference value, Δe is the difference between the last CO concentration difference, r(k) is the reference value, and Δkp is the difference between the last CO concentration value and the last CO concentration value. The difference of kp, Δki is the difference from the previous ki, Δkd is the difference from the previous kd, and kp, ki, and kd are the proportional parameter, the integral parameter, and the differential parameter, respectively. The fuzzification of e and Δe is to approximate e and Δe. The process of fuzzification of Δkp, Δki, and Δkd is the same. The adjustment of Δkp, Δki, and Δkd can be done by looking up the table value through the membership function of fuzzy control. The defuzzification budget is to specify the approximated value.

Exemplarily, the PID operation in FIG. 4 satisfies the following formula:

Wherein, y(k) is the operating time of the electric motor.

Compared with the prior art, in the engine fuel injection quantity control method disclosed in the embodiment of the present invention, first, the current CO concentration value is obtained; then, it is judged whether the current CO concentration value is greater than the preset reference value; finally, when the current CO concentration value is When the value is greater than the reference value, the operating parameters of the electric motor are adjusted to reduce the fuel injection amount of the engine; when the current CO concentration value is less than the reference value, the operating parameters of the electric motor are adjusted to increase the fuel injection amount of the engine. Because in the process of judging whether the current CO concentration value is greater than the preset reference value, the degree measured by the exhaust gas analyzer is compared with the reference value, so there is no need to manually judge whether the current CO concentration value is too rich or too low, saving human resources; , When the current CO concentration value is too rich or too low, by adjusting the operating parameters of the electric motor to control the adjustment knob of the fuel injection quantity regulator, so as to increase or decrease the fuel injection quantity of the engine accordingly, which can improve the control of the fuel injection quantity of the engine Accuracy and efficiency, saving human resources.

Referring to FIG. 5, FIG. 5 is a structural block diagram of an engine fuel injection quantity control device 10 provided by an embodiment of the present invention; the engine fuel injection quantity control device 10 includes:

The CO concentration value obtaining unit 11 is used to obtain the current CO concentration value in the exhaust gas discharged from the exhaust pipe of the engine measured by the exhaust gas analyzer;

The CO concentration value calculation unit 12 is configured to determine whether the current CO concentration value is greater than a preset reference value;

The fuel injection quantity adjustment unit 13 is used to adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine when the current CO concentration value is greater than the reference value; wherein, the electric motor and the The adjusting knob of the fuel injection quantity regulator is connected; it is also used for adjusting the operating parameters of the electric motor to control the fuel injection quantity regulator to increase the fuel injection quantity of the engine when the current CO concentration value is less than the reference value;

The solenoid valve control unit 14 is configured to close the solenoid valve when the current CO concentration value is within a preset threshold range; wherein the solenoid valve is arranged between the exhaust gas analyzer and the engine exhaust pipe .

It should be noted that the engine fuel injection quantity control device 10 according to the embodiment of the present invention may be a vehicle-mounted terminal, and the vehicle-mounted terminal includes a PC (host computer) for displaying data visually and a single-chip microcomputer for processing the data. The vehicle terminal is the front-end equipment of the vehicle monitoring and management system, which integrates multiple functions such as data processing and data communication, and has powerful business scheduling functions and data processing capabilities.

Optionally, the operating parameter of the electric motor includes a rotation direction of the electric motor, and the rotation direction includes clockwise rotation and counterclockwise rotation; wherein, when the current CO concentration value is greater than the reference value, the electric motor The motor rotates counterclockwise to drive the adjustment knob of the fuel injection quantity regulator to rotate counterclockwise; when the current CO concentration value is less than the reference value, the electric motor rotates clockwise to drive the fuel injection quantity regulator Turn the adjustment knob clockwise.

Optionally, the operating parameters of the electric motor further include a rotation time of the electric motor, and the rotation time is adjusted according to a preset PID algorithm.

It is worth noting that, for the specific working process of each unit in the engine fuel injection quantity control device 10, please refer to the working process of the engine fuel injection quantity control method described in the above-mentioned embodiment, which will not be repeated here.

Compared with the prior art, the engine fuel injection quantity control device 10 disclosed in the embodiment of the present invention firstly obtains the current CO concentration value; then, judges whether the current CO concentration value is greater than the preset reference value; When the value is greater than the reference value, the operating parameters of the electric motor are adjusted to reduce the fuel injection amount of the engine; when the current CO concentration value is less than the reference value, the operating parameters of the electric motor are adjusted to increase the fuel injection amount of the engine. Because in the process of judging whether the current CO concentration value is greater than the preset reference value, the degree measured by the exhaust gas analyzer is compared with the reference value, so there is no need to manually judge whether the current CO concentration value is too rich or too low, saving human resources; , When the current CO concentration value is too rich or too low, by adjusting the operating parameters of the electric motor to control the adjustment knob of the fuel injection quantity regulator, so as to increase or decrease the fuel injection quantity of the engine accordingly, which can improve the control of the fuel injection quantity of the engine Accuracy and efficiency, saving human resources.

Referring to FIG. 6, FIG. 6 is a structural block diagram of an engine fuel injection quantity control device 20 provided by an embodiment of the present invention; the engine fuel injection quantity control device 20 includes: a processor 21, a memory 22, and a storage device stored in the memory and a computer program executable on the processor, such as a ride control program. When the processor 21 executes the computer program, the steps in the above-mentioned embodiments of the engine fuel injection quantity control method are implemented, for example, steps S1 to S4 shown in FIG. 1 . Alternatively, when the processor executes the computer program, the functions of each module in the above-mentioned device embodiments, such as the CO concentration value acquisition unit 11 , are implemented.

Exemplarily, the computer program can be divided into one or more modules, and the one or more modules are stored in the memory 22 and executed by the processor 21 to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of accomplishing specific functions, and the instruction segments are used to describe the execution process of the computer program in the engine fuel injection quantity control apparatus 20 . For example, the computer program can be divided into a CO concentration value acquisition unit 11, a CO concentration value calculation unit 12, a fuel injection quantity adjustment unit 13 and a solenoid valve control unit 14. The specific functions of each unit are as follows:

The CO concentration value obtaining unit 11 is used to obtain the current CO concentration value in the exhaust gas discharged from the exhaust pipe of the engine measured by the exhaust gas analyzer;

The CO concentration value calculation unit 12 is configured to determine whether the current CO concentration value is greater than a preset reference value;

The fuel injection quantity adjustment unit 13 is used to adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine when the current CO concentration value is greater than the reference value; wherein, the electric motor and the The adjusting knob of the fuel injection quantity regulator is connected; it is also used for adjusting the operating parameters of the electric motor to control the fuel injection quantity regulator to increase the fuel injection quantity of the engine when the current CO concentration value is less than the reference value;

The solenoid valve control unit 14 is configured to close the solenoid valve when the current CO concentration value is within a preset threshold range; wherein the solenoid valve is arranged between the exhaust gas analyzer and the engine exhaust pipe .

For the specific working process of each unit, reference may be made to the working process of the engine fuel injection quantity control device 10 described in the above-mentioned embodiment, which will not be repeated here.

The engine fuel injection quantity control device 20 may be a computing device such as a desktop computer, a notebook computer, a palmtop computer, and a cloud server. The engine fuel injection quantity control device 20 may include, but is not limited to, a processor 21 and a memory 22 . Those skilled in the art can understand that the schematic diagram is only an example of an image enhancement device, and does not constitute a limitation on the engine fuel injection quantity control device 20, which may include more or less components than the one shown, or combine some components , or different components, for example, the engine fuel injection quantity control device 20 may further include an input and output device, a network access device, a bus, and the like.

The so-called processor 21 may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The processor 21 is the control center of the engine fuel injection quantity control device 20, and uses various interfaces and lines to connect the entire engine Various parts of the fuel injection quantity control apparatus 20 .

The memory 22 can be used to store the computer programs and/or modules, and the processor 21 executes or executes the computer programs and/or modules stored in the memory 22 and calls the data stored in the memory 22, Various functions of the engine fuel injection quantity control device 20 are realized. The memory 22 may mainly include a stored program area and a stored data area, wherein the stored program area may store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.); the storage data area may Stores data (such as audio data, phonebook, etc.) created according to the use of the mobile phone, and the like. In addition, the memory 22 may include high-speed random access memory, and may also include non-volatile memory such as hard disk, internal memory, plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

Wherein, if the integrated modules of the engine fuel injection quantity control device 20 are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the processes in the methods of the above embodiments, and can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer When the program is executed by the processor, the steps of the foregoing method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like. The computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disc, a computer memory, a read-only memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

Referring to FIG. 7, FIG. 7 is a structural block diagram of an engine fuel injection quantity control system 30 provided by an embodiment of the present invention. The engine fuel injection quantity control system 30 includes: an exhaust gas analyzer 31 , an electric motor 32 , a fuel injection quantity regulator 33 , a solenoid valve 34 and the engine fuel injection quantity control device 10 described in the above embodiments.

It should be noted that, for the specific working process of the engine fuel injection quantity control system 30 , reference may be made to the working process of the engine fuel injection quantity control device 10 described in the above-mentioned embodiment, which will not be repeated here.

Compared with the prior art, the engine fuel injection quantity control system 30 disclosed in the embodiment of the present invention firstly obtains the current CO concentration value; then, judges whether the current CO concentration value is greater than the preset reference value; When the value is greater than the reference value, the operating parameters of the electric motor are adjusted to reduce the fuel injection amount of the engine; when the current CO concentration value is less than the reference value, the operating parameters of the electric motor are adjusted to increase the fuel injection amount of the engine. Because in the process of judging whether the current CO concentration value is greater than the preset reference value, the degree measured by the exhaust gas analyzer is compared with the reference value, so there is no need to manually judge whether the current CO concentration value is too rich or too low, saving human resources; , When the current CO concentration value is too rich or too low, by adjusting the operating parameters of the electric motor to control the adjustment knob of the fuel injection quantity regulator, so as to increase or decrease the fuel injection quantity of the engine accordingly, which can improve the control of the fuel injection quantity of the engine Accuracy and efficiency, saving human resources.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can also be made, and these improvements and modifications may also be regarded as It is the protection scope of the present invention.

Claims (10)

1. an engine fuel injection quantity control method, is characterized in that, comprises: Obtain the current CO concentration value in the exhaust gas discharged from the engine exhaust pipe measured by the exhaust gas analyzer; judging whether the current CO concentration value is greater than a preset reference value; When the current CO concentration value is greater than the reference value, adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine; wherein, the electric motor and the adjustment knob of the fuel injection quantity regulator connect; When the current CO concentration value is less than the reference value, the operating parameters of the electric motor are adjusted to control the fuel injection quantity regulator to increase the fuel injection quantity of the engine. 2. The engine fuel injection quantity control method according to claim 1, characterized in that, after the acquisition of the current CO concentration value in the exhaust gas discharged from the engine exhaust pipe measured by the exhaust gas analyzer, the method further comprises: When the current CO concentration value is within a preset threshold range, the solenoid valve is closed; wherein, the solenoid valve is arranged between the exhaust gas analyzer and the exhaust pipe of the engine. 3. The engine fuel injection quantity control method according to claim 1, wherein the operating parameter of the electric motor comprises a rotation direction of the electric motor, and the rotation direction includes clockwise rotation and counterclockwise rotation; wherein, When the current CO concentration value is greater than the reference value, the electric motor rotates counterclockwise to drive the adjustment knob of the fuel injection quantity regulator to rotate counterclockwise; When the current CO concentration value is less than the reference value, the electric motor rotates clockwise to drive the adjustment knob of the fuel injection quantity adjuster to rotate clockwise. 4 . The engine fuel injection quantity control method according to claim 1 , wherein the operating parameters of the electric motor further include a rotation time of the electric motor, and the rotation time is adjusted according to a preset PID algorithm. 5 . 5. An engine fuel injection quantity control device, characterized in that, comprising: The CO concentration value acquisition unit is used to obtain the current CO concentration value in the exhaust gas discharged from the exhaust pipe of the engine measured by the exhaust gas analyzer; A CO concentration value calculation unit, configured to determine whether the current CO concentration value is greater than a preset reference value; The fuel injection quantity adjustment unit is used for adjusting the operating parameters of the electric motor to control the fuel injection quantity regulator to reduce the fuel injection quantity of the engine when the current CO concentration value is greater than the reference value; is connected to the adjusting knob of the fuel injection quantity regulator; and is also used to adjust the operating parameters of the electric motor to control the fuel injection quantity regulator to increase the engine fuel injection quantity when the current CO concentration value is less than the reference value. 6. The engine fuel injection quantity control device according to claim 5, wherein the engine fuel injection quantity control device further comprises: A solenoid valve control unit, configured to close the solenoid valve when the current CO concentration value is within a preset threshold value range; wherein the solenoid valve is arranged between the exhaust gas analyzer and the engine exhaust pipe. 7 . The engine fuel injection quantity control device according to claim 5 , wherein the operation parameter of the electric motor includes a rotation direction of the electric motor, and the rotation direction includes clockwise rotation and counterclockwise rotation; wherein, When the current CO concentration value is greater than the reference value, the electric motor rotates counterclockwise to drive the adjustment knob of the fuel injection quantity regulator to rotate counterclockwise; When the current CO concentration value is less than the reference value, the electric motor rotates clockwise to drive the adjusting knob of the fuel injection quantity adjuster to rotate clockwise. 8 . The engine fuel injection quantity control device according to claim 5 , wherein the operating parameters of the electric motor further include a rotation time of the electric motor, and the rotation time is adjusted according to a preset PID algorithm. 9 . 9. An engine fuel injection quantity control device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor executing the computer program The engine fuel injection quantity control method as claimed in any one of claims 1 to 4 is realized at the time. 10 . An engine fuel injection quantity control system, characterized in that it comprises an exhaust gas analyzer, an electric motor, a fuel injection quantity regulator, and the engine fuel injection quantity control device according to any one of the preceding claims 5 to 8 .

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