Start-stop control system and method for gasoline engine

Abstract

The invention discloses a gasoline engine start-stop control system which comprises a temperature detection module, a rotating speed detection module, a choke valve motor, a control module and a counting module. The starting control table comprises the opening degrees of the choke valve corresponding to different temperature intervals during starting each time and the opening degrees of the choke valve corresponding to different time after successful starting; in the starting process, the control module controls the choke valve motor according to the engine temperature and the starting control table and judges whether the engine is started successfully or not, after it is judged that starting succeeds, the control module controls the subsequent choke valve opening degree according to the starting control table, and after it is judged that starting fails, the control module controls the choke valve motor according to the starting control table. And the control module controls the motor to enable the choke valve to be opened to the next opening. According to the method, the corresponding choke valve control logic can be selected in the engine starting process, factors such as starting failure are considered while operation convenience and control accuracy are achieved, complex and changeable environmental influences can be dealt with, and the engine can be started more conveniently and rapidly.

Description

Technical Field

[0001] The invention relates to a gasoline engine control system, and in particular to a gasoline engine start-stop control system and method. Background Art

[0002] A gasoline engine is an engine that uses gasoline as fuel to convert internal energy into kinetic energy. Since gasoline has low viscosity and evaporates quickly, it can be sprayed into the cylinder using a gasoline injection system. After being compressed to a certain temperature and pressure, it is ignited by a spark plug to expand the gas and do work. The characteristics of a gasoline engine are high speed, simple structure, light weight, low cost, stable operation, and easy use and maintenance. Gasoline engines are widely used in automobiles, especially small cars.

[0003] At present, when a gasoline engine is started manually, the choke opening is mostly controlled manually through a handle or through a temperature control valve. The former cannot achieve intelligent automated collaborative operations such as one-button start, Bluetooth start, and remote start. The latter cannot accurately control the throttle opening or the control accuracy is not sensitive. In addition, the starting application scenarios are complex and changeable, resulting in failure to start or requiring multiple starts to successfully start.

[0004] Chinese patent document CN101280739A discloses an automatic choke device for an engine, which can start the engine smoothly and more reliably even if various starting conditions when starting the engine are complexly related to each other. It comprises: a choke (42) that makes the opening (O) of the intake passage (38) of the engine (9) variable; and a starter motor (65) that can start the engine (9). When the starter motor (65) is turned on (S6), the choke (42) starts to open the valve from a fully closed state. Before reaching the starting opening (O1) determined according to the temperature (T) of the engine (9) (S12), the choke (42) opens the valve at a specified opening speed (V).

[0005] Chinese patent document CN1667259B discloses an automatic choke device, which performs accurate choke control adapted to the operating state of the engine. A throttle valve (8) and a choke valve (9) connected in series are provided on the intake pipe (6), and the opening of the choke valve (9) is controlled by a stepper motor (11). The choke valve opening when the engine is started is determined according to the engine temperature. When the power supply for starting the engine is turned on, the stepper motor (11) is initialized on the fully closed side of the choke valve (9). Alternatively, it is determined whether the starting opening of the choke valve is close to fully closed or close to fully open. If it is close to the fully closed side, the stepper motor (11) is initialized on the fully closed side. On the other hand, if it is close to the fully open side, the motor is initialized on the fully open side.

[0006] And Chinese patent document CN1667260A discloses an automatic choke device, which performs accurate choke control adapted to the operating state of the engine. A throttle valve (8) and a choke valve (9) connected in series therewith are provided on the intake pipe (6), and the opening of the choke valve (9) is controlled by a stepper motor (11). The choke valve opening (starting opening) when the engine is started is determined according to the engine temperature. The driving pulse repetition frequency of the stepper motor (11) is also determined according to the engine temperature. When the engine temperature is lower than the temperature (TL), the pulse repetition frequency is set to the lowest first frequency within the set range. And the pulse repetition frequency is set to gradually increase to the second frequency (TH) corresponding to the engine temperature. When the throttle is gradually released during the preheating operation, the pulse repetition frequency is reduced so as to obtain a high-precision throttle opening by using high torque.

[0007] The prior art has the following shortcomings: Although the above patents can accurately control the choke opening according to the engine temperature or speed to more reliably start the engine smoothly. However, the technologies disclosed in the above patents are all based on electric starting methods, and are based on the premise that the engine can be started successfully once, and do not consider problems such as manual starting, unsuccessful starting, and accidental flameout after successful starting during the starting process. Due to the complex starting environment, the starting conditions are affected by many factors, such as ambient temperature, atmospheric pressure, engine temperature, fuel quality, etc., and it is impossible to guarantee that the engine can be started once and can be started smoothly the next time after flameout. Summary of the invention

[0008] The present invention provides a gasoline engine start-stop control system, comprising a temperature detection module for detecting engine temperature;

[0009] A speed detection module, used to detect the engine speed;

[0010] A choke motor is used to control the choke opening;

[0011] a control module for controlling a choke motor based on detected engine temperature and engine speed;

[0012] A counting module, used for counting the number of times the engine is started;

[0013] Wherein: the control module is preset with a start-up control table, which includes the choke opening corresponding to different temperature intervals at each start-up and the choke opening corresponding to different times after the start-up is successful;

[0014] During the starting process, the control module controls the choke motor according to the engine temperature and the starting control table, and determines whether the engine has started successfully. After determining that the start is successful, the control module also controls the subsequent choke opening according to the starting control table. After determining that the start has failed, the control module controls the motor to make the choke opening to the next opening.

[0015] Preferably, it further includes a manual start module for manually starting the engine; the start control table includes a manual start control table, the manual start control table includes the choke opening corresponding to different temperature intervals at each manual start and the choke opening corresponding to different times after the manual start is successful;

[0016] During the manual start process, the control module controls the choke motor according to the engine temperature and the manual start control table, and determines whether the engine has started successfully. After determining that the start is successful, the control module also controls the subsequent choke opening according to the manual start control table. After determining that the start has failed, the control module controls the motor to open the choke to the next opening.

[0017] Preferably, the control module is preset with a successful start speed. When the engine speed is not lower than the successful start speed, the engine is determined to have been started successfully, otherwise it is determined to have failed to start.

[0018] Preferably, the different temperature intervals in the manual start control table include a low temperature zone, a normal temperature zone, and a high temperature zone. When the control module does not recognize the temperature signal, the control module controls the choke motor according to the choke opening corresponding to the normal temperature zone. In this solution, when the temperature detection module fails, the choke opening corresponding to the normal temperature zone is used by default to control the choke motor, which can ensure that the engine start can be controlled even when the temperature detection module fails. Preferably, the control module is preset with a successful start speed. When determining whether the engine has been successfully started, the engine speed and the successful start speed are compared. When the engine speed is not lower than the successful start speed, the engine is determined to have been successfully started, otherwise it is determined that the start has failed. In this solution, the determination of whether the engine start is successful is achieved by comparing the engine speed and the successful start speed, and the operation is simple.

[0019] Preferably, it also includes a starter motor for starting the engine; it also includes a start-stop button for sending an electric start-stop signal for starting the engine or shutting down the engine after being triggered; the control module is also preset with an electric start control table, which includes choke openings corresponding to different temperature zones and different start times, and the choke opening changes with the start time; after receiving the electric start-stop signal, the control module controls the choke motor according to the engine temperature and the electric start control table so that the choke opening reaches the corresponding choke opening, and the control module controls the starter motor to work. During the electric start process, the control module controls the subsequent choke opening according to the choke opening corresponding to the starter motor's working times. In this solution, the electric start control of the engine is also achieved through the cooperation of the start-stop button, the control module, and the electric start control table, which is simple to operate.

[0020] Preferably, during the electric start process, the control module also determines whether the start is successful. After determining that the start is successful, the control module controls the choke motor according to the choke opening corresponding to the number of working times and the engine temperature to control the subsequent choke opening until the choke is fully open; after determining that the start fails, the control module controls the starter motor to start again after a certain interval until the start is successful. In this solution, when the start fails, the engine is restarted to try to start, which is simple to operate.

[0021] Preferably, the control module is also preset with a start-up number threshold. During the electric start process, when the control module controls the starter motor to execute the start-up number reaching the start-up number threshold and still determines that the start-up fails, the start-stop control system stops working. In this solution, when the start-up fails after the number of executions reaches the start-up number threshold, it is determined that the motor cannot start normally. If a fault occurs, even if more start operations are performed, the generator cannot be started. At this time, the starter motor stops working, thereby stopping this round of electric starting, which can avoid the useless work of the starter motor, avoid energy waste, and is simple to operate.

[0022] Preferably, it also includes a flameout switch, which is used to connect or disconnect the electrical connection of the start-stop control system and trigger the initialization of the control module. In this solution, manual start and electric start can be performed alternately to achieve a variety of engine start methods, which is easy to operate. Note: In this solution, initialization will clear parameters such as the number of starts and temperature, and set the damper opening to the default position.

[0023] Preferably, in a normal flameout state, the control module controls the choke motor to control the choke to remain fully open or fully closed after a certain delay; in an abnormal flameout state, the control module controls the choke motor to control the choke to remain fully open or fully closed immediately. In this solution, on the one hand, for different flameout situations, the control module can control the choke to be fully closed immediately / delayed for a certain time or remain fully open according to different situations, so as to facilitate a smooth start next time; on the other hand, it prevents backfires during flameout, where the cause of backfires is that the fuel does not fully burn in the engine combustion chamber and then enters the muffler, causing abnormal combustion. Note: In this solution, the abnormal flameout state refers to the timing after the startup is determined to be successful, and the speed is less than the preset speed within the preset time; the normal flameout state refers to the timing after the startup is determined to be successful, and the speed is less than the preset speed after the preset time.

[0024] Preferably, a power supply device is also included to supply power to the control module and the starter motor, and the control module automatically goes into sleep mode when the engine is not started for a long time. In this solution, the power consumption of the power supply device can be reduced by setting the control module to automatically go into sleep mode.

[0025] In a second aspect, the present invention further provides a gasoline engine start-stop control method, which uses the gasoline engine start-stop control system as described above to control the engine.

[0026] The present invention has the following beneficial effects: 1. Compared with the prior art, the present invention can select corresponding choke control logic for manual start or electric start, takes into account factors such as start failure while ensuring operational convenience and control accuracy, can cope with complex and changeable environmental influences, and start the engine more conveniently and quickly.

[0027] 2. When the engine is turned off, the next action of the choke is controlled by identifying the way the engine is turned off, so as to facilitate a smooth start next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A module block diagram of an embodiment of a gasoline engine start-stop control system and method of the present invention;

[0029] Figure 2 This is the module block diagram of the flameout mode;

[0030] Figure 3 It is a flowchart of the hand start method;

[0031] Figure 4 This is a flow chart of the electric starting method;

[0032] Figure 5 The control flow chart for flameout;

[0033] Figure 6 This is the third successful electric start of the engine at a temperature of -5°C, and the change in the choke opening during the start process;

[0034] Figure 7 This is the first successful electric start of the engine at a temperature of 20°C, and the change in the choke opening during the start process;

[0035] Figure 8 This is a diagram of the change in choke opening during the second successful electric start of the engine at a temperature of 80°C. DETAILED DESCRIPTION

[0036] The following is further described in detail through specific implementation methods:

[0037] 1. Definition

[0038] Cylinder head: Cylinder head is generally called cylinder head, which is a part of the engine, the engine cylinder head. The cylinder head is installed on the top of the cylinder body, sealing the cylinder from the top and forming the combustion chamber.

[0039] Starting pull plate: The starting pull plate is a structure used to start small gasoline engines. The starting end of a small gasoline engine is equipped with a hand-starting pull plate. The engine is started by a small amount of starting power provided by the starting pull plate.

[0040] The choke is a component on the carburetor of a gasoline engine. It is usually located at the air intake of the carburetor and is operated by a knob installed on the dashboard. Its function is to properly close part of the air intake when the engine is cold started, increase the gasoline concentration of the mixture entering the cylinder, and improve the starting performance of the engine.

[0041] Normal flameout state: If the flameout is turned off by the start-stop button, the timing will start after the startup is determined to be successful (≥1500rpm). After the preset time (10 seconds in this solution), the speed is less than the preset speed (1500rpm in this solution).

[0042] Abnormal flameout state: such as accidental flameout during starting, flameout due to fuel exhaustion, oil alarm, ignition failure, etc., manifested as timing after the start is determined to be successful (≥1500rpm), and the speed is less than the preset speed (1500rpm in this solution) within the preset time (10 seconds in this solution).

[0043] 2. The embodiment is basically as shown in the attached Figure 1 and Figure 2 As shown: a gasoline engine start-stop control system, including a temperature detection module for detecting the engine temperature; in this embodiment, the temperature detection module uses a temperature sensor, and the temperature detection module is assembled on the cylinder wall to detect the engine temperature.

[0044] The speed detection module is used to detect the engine speed; a speed sensor is used;

[0045] The choke motor is used to control the choke opening; the choke motor is connected to the choke shaft on the carburetor, thereby controlling the opening angle of the choke plate;

[0046] a control module for controlling a choke motor based on detected engine temperature and engine speed;

[0047] The control module is preset with a start number threshold, a successful start speed, a manual start control table and an electric start control table;

[0048] Manual start module, used to manually start the engine, using a starter pull plate;

[0049] The start-stop button is used to initiate an electric start-stop signal after being triggered. When the engine is stopped, the electric start-stop signal triggers the engine to start; when the engine is running, the electric start-stop signal triggers the engine to shut down;

[0050] A starter motor, used to start the engine;

[0051] The flameout switch is used to connect or disconnect the electrical connection of the start-stop control system and trigger the initialization of the control module. After initialization, the control module controls the operation of the choke motor. In this embodiment, initialization will clear parameters such as the number of starts and temperature, and set the throttle opening to the default position. The flameout switch is a physical power on-off switch.

[0052] The manual start control table includes the choke opening corresponding to each manual start in different temperature ranges and the choke opening corresponding to different times after the manual start is successful; during the manual start process, the control module controls the choke motor according to the engine temperature and the manual start control table, and determines whether the engine is started successfully. After determining that the start is successful, the control module also controls the subsequent choke opening according to the manual start control table. After determining that the start fails, the control module controls the motor to open the choke to the next opening.

[0053] The electric start control table includes the choke openings corresponding to different temperature zones and different start times, and the choke opening changes with the start time; during the electric start process, after receiving the electric start-stop signal, the control module controls the choke motor according to the engine temperature and the electric start control table to make the choke opening reach the corresponding choke opening, and the control module controls the starter motor to work. During the electric start process, the control module controls the subsequent choke opening according to the choke opening corresponding to the number of times the starter motor works.

[0054] During the electric start process, the control module also determines whether the start is successful. After determining that the start is successful, the control module controls the choke motor according to the choke opening corresponding to the number of working times and the engine temperature to control the subsequent choke opening until the choke is fully open; after determining that the start fails, the control module controls the starter motor to start again after a certain interval until the start is successful. Specifically, in this embodiment, after determining that the start is successful, the starter motor automatically stops working after running for a preset period of time.

[0055] The power supply device is used to supply power to the control module and the starter motor. When the engine is not started for a long time, the control module automatically goes into sleep mode. The power supply device is preferably a battery.

[0056] In the above process, when determining whether the engine is started successfully, the engine speed and the start success speed are compared. When the engine speed is not lower than the start success speed, the engine is determined to be started successfully, otherwise it is determined that the start failed.

[0057] The different temperature intervals in the manual start control table and the electric start control table include low temperature zone, normal temperature zone and high temperature zone. When the control module does not recognize the temperature signal, the control module controls the choke motor according to the choke opening corresponding to the normal temperature zone.

[0058] During the electric starting process, before the engine starts successfully, the starter motor works more than once, and the duration of each start is preferably 5s, and the interval between each start is preferably 5s. When the starter motor starts for the first time, if the speed reaches the preset successful start speed, the starter motor stops working. If the speed does not reach the preset successful start speed, the next start is continued; when the control module controls the starter motor to execute the number of times to reach the start number threshold and still determines that the start fails, the starter motor stops working. In this embodiment, the start number threshold is set to 6 times.

[0059] In the normal flameout state, the control module controls the choke motor to control the choke to remain fully open or to fully close after a certain delay; in the abnormal flameout state, the control module controls the choke motor to control the choke to remain fully open or to fully close immediately.

[0060] This embodiment also provides a gasoline engine start-stop control method using the above-mentioned gasoline engine start-stop control system.

[0061] In the above electric start control table, the choke opening corresponding to each manual pull at different temperature intervals is shown in Table 1, and the choke opening corresponding to different times after the manual start is successful is shown in Table 2.

[0062] Table 1

[0063]

[0064] Table 1 represents the opening degree that the choke valve should reach before each manual pull and the opening degree that the choke valve should maintain during each manual pull in different temperature ranges.

[0065] Table 2

[0066]

[0067] In the different temperature ranges of the codes in Table 2, the timing starts from 0 after a successful manual start, and the choke opening changes with time.

[0068] Where k represents the corresponding choke opening when the nth manual start is successful in the same temperature range in Table 1;

[0069] For example: when T≤0℃, the second manual start is successful, then k=0%;

[0070] When 0℃≤T≤40℃, the third manual start is successful, then k=100%;

[0071] When T>40℃, the third manual start is successful, then k=30%.

[0072] In the electric start control table, the corresponding choke openings in different temperature zones and different start times are shown in Tables 3 and 4.

[0073] Table 3

[0074]

[0075] Table 4

[0076]

[0077]

[0078] The specific implementation is as follows: the flameout switch controls the on and off of the entire system circuit, and is divided into at least ON and OFF positions. When it is in the ON position, the system is powered on and works normally, and when it is in the OFF position, the system is powered off and stops working.

[0079] like Figure 3 As shown, in the manual start mode, the flameout switch is placed in the ON position, the system is electrically connected, the control module starts to initialize, the start pull plate is pulled, the control module receives the manual start signal, and determines the change in the choke opening from Table 1 and Table 2 according to the cylinder head temperature detected by the temperature sensor; during the manual start process, the power supply module supplies power to the control module, and the control module controls the action of the choke motor to rotate the choke shaft and drive the choke to open the corresponding opening. At the same time, the speed sensor detects the engine speed and transmits the signal to the control module, and the control module determines whether the start is successful based on the speed.

[0080] According to Table 1, each time the starter pull plate is pulled, it is counted as one start, and the cumulative count is n. After each pull, the control module controls the choke motor to rotate the choke shaft to drive the choke to the set angle, keep the set angle unchanged during each pull, and perform the next action according to the engine speed detected by the speed sensor after each pull:

[0081] ① If the speed is less than the starting success speed (1500rpm), it is determined that the start has failed. Then, according to the provisions of Table 1, the control module controls the choke to reach the opening required for the next manual pull;

[0082] ② If the speed is greater than the successful start speed (1500rpm), the start is determined to be successful, and the choke opening is controlled over time according to Table 2.

[0083] Assuming that the second manual start is successful when the engine temperature is -5°C, the change in the choke opening during the start process is shown in Table 5.

[0084] Table 5

[0085]

[0086] Assume that the first manual start is successful when the engine temperature is 20°C. Table 6 shows the change in choke opening during the start process.

[0087] Table 6

[0088]

[0089] The third manual start was successful when the engine temperature was assumed to be 80°C. Table 7 shows the change in the choke opening during the start process.

[0090] Table 7

[0091]

[0092] like Figure 4 As shown, in the electric start mode, the flameout switch is set to the ON position, the system is powered on, and the control module is initialized. Press the start-stop button, and the control module detects the temperature based on the temperature sensor set on the outer wall of the cylinder. According to Tables 4 and 5, the control module controls the choke motor to make the choke quickly reach the set initial angle, and then the control module controls the starter motor to work. The starter motor preferably works for 5s. During the electric start process, the control module controls the choke action according to Table 3 corresponding to the number of starter motor operations in Table 4, and during the start process, the speed sensor continuously detects the engine speed. If the speed does not reach 1500rpm, the start is determined to have failed. After the start motor is started, the start work is performed again after an interval of 5s. If the speed reaches 1500rpm, the start is determined to be successful, the starter motor stops working, and the choke acts according to Table 3 corresponding to the current number of starter motor starts in Table 4 until it is fully open.

[0093] Each time the start-stop button is pressed, the starter motor automatically starts 6 times, each start lasting 5 seconds. It is preferably started again after 5 seconds since the last start. When the start is successful or fails after 6 starts, the starter motor stops working and this round of electric starting ends.

[0094] The third electric start is successful when the engine temperature is -5℃. The choke opening changes during the start process as follows: Figure 6 shown.

[0095] The first electric start is successful when the engine temperature is 20℃. The choke opening changes during the start process as follows: Figure 7 shown.

[0096] The second electric start is successful when the engine temperature is 80℃. The choke opening changes during the start process as follows: Figure 8 shown.

[0097] In this embodiment, the control module can control the choke to be fully closed immediately or after a certain delay or remain fully open according to different flameout modes. Figure 5 The details are as follows:

[0098] 1. Turn off the engine by pressing the start-stop button. The following options are preferred for the choke action:

[0099] ① For ordinary two-step carburetors, after pressing the start-stop button, the choke will be fully closed after a delay of 5 seconds. The delay time can be changed according to different needs;

[0100] ②For manual-automatic carburetors, keep the choke fully open after pressing the start-stop button.

[0101] 2. The engine is not turned off by the start-stop button:

[0102] (1) Accidental flameout during startup:

[0103] It means that the control module has determined that the start-up is successful during the start-up process, but the engine is accidentally turned off again during the full opening of the choke. The choke action preferably adopts the following solutions:

[0104] ① For ordinary two-step carburetors, the choke should be fully closed immediately after the engine is turned off;

[0105] ② For manual-automatic carburetor electric start, keep the choke fully open after the engine is turned off;

[0106] (2) If the engine is not shut down by the start-stop button due to fuel exhaustion, oil alarm, ignition failure, etc., the following options are preferred for choke operation:

[0107] ① For ordinary two-step carburetors, the choke should be fully closed immediately after the engine is turned off;

[0108] ② For manual-automatic carburetors, keep the choke fully open after the engine is turned off.

[0109] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A gasoline engine start-stop control system, comprising a temperature detection module for detecting engine temperature; A speed detection module, used to detect the engine speed; A choke motor is used to control the choke opening; A control module, used for controlling the choke motor according to the detected engine temperature and engine speed; A counting module, used for counting the number of times the engine is started; The invention is characterized in that: the control module is preset with a start-up control table, and the start-up control table includes the choke opening corresponding to different temperature intervals at each start-up and the choke opening corresponding to different times after the start-up is successful; During the starting process, the control module controls the choke motor according to the engine temperature and the starting control table, and determines whether the engine has started successfully. After determining that the start is successful, the control module also controls the subsequent choke opening according to the starting control table. After determining that the start fails, the control module controls the motor to make the choke opening to the next opening.

2. The gasoline engine start-stop control system according to claim 1, characterized in that: It also includes a manual start module for manually starting the engine; the start control table includes a manual start control table, and the manual start control table includes the choke opening corresponding to different temperature intervals at each manual start and the choke opening corresponding to different times after the manual start is successful; During the manual start process, the control module controls the choke motor according to the engine temperature and the manual start control table, and determines whether the engine has started successfully. After determining that the start is successful, the control module also controls the subsequent choke opening according to the manual start control table. After determining that the start fails, the control module controls the motor to open the choke to the next opening.

3. The gasoline engine start-stop control system according to claim 1 or 2, characterized in that: The control module is preset with a successful start speed. When the engine speed is not lower than the successful start speed, it is determined that the engine is started successfully, otherwise it is determined that the start fails.

4. The gasoline engine start-stop control system according to claim 3, characterized in that: The different temperature intervals in the manual start control table include a low temperature zone, a normal temperature zone and a high temperature zone. When the control module does not recognize the temperature signal, the control module controls the choke motor according to the choke opening corresponding to the normal temperature zone.

5. The gasoline engine start-stop control system according to claim 1 or 2, characterized in that: It also includes a starter motor for starting the engine; and a start-stop button for sending an electric start-stop signal for starting or shutting down the engine after being triggered; The control module is also preset with an electric start control table, which includes choke valve openings corresponding to different temperature zones and different start times, and the choke valve openings vary with the start time; After receiving the electric start-stop signal, the control module controls the choke motor according to the engine temperature and the electric start control table so that the choke opening reaches the corresponding choke opening, and the control module controls the operation of the starter motor. During the electric start process, the control module controls the subsequent choke opening according to the choke opening corresponding to the number of times the starter motor works.

6. The gasoline engine start-stop control system according to claim 5, characterized in that: During the electric starting process, the control module also determines whether the start is successful. After determining that the start is successful, the control module controls the choke motor according to the choke opening corresponding to the number of working times and the engine temperature to control the subsequent choke opening until the choke is fully open; after determining that the start has failed, the control module controls the starter motor to start again after a certain interval until the start is successful.

7. The gasoline engine start-stop control system according to claim 6, characterized in that: The control module is also preset with a start-up times threshold. During the electric start process, if the control module controls the starter motor to start for a number of times that reaches the start-up times threshold and still determines that the start-up fails, the start-stop control system stops working.

8. The gasoline engine start-stop control system according to claim 7, characterized in that: It also includes an ignition off switch, which is used to connect or disconnect the electrical connection of the start-stop control system and trigger the initialization of the control module.

9. The gasoline start-stop control system according to claim 8, characterized in that: In a normal flameout state, the control module controls the choke motor to control the choke to remain fully open or to fully close after a certain delay; in an abnormal flameout state, the control module controls the choke motor to control the choke to remain fully open or to fully close immediately.

10. The gasoline engine start-stop control system according to claim 9, characterized in that: It also includes a power supply device for supplying power to the control module and the starter motor. When the engine is not started for a long time, the control module automatically goes into sleep mode.

11. A gasoline engine start-stop control method, characterized in that: The gasoline engine start-stop control system as described in claims 1-9 is used to control the engine.

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