Ignition method and system capable of easily starting cold machine

Abstract

The invention relates to an ignition method and system capable of easily starting a cold machine, a first starting curve and a second starting curve are set respectively, and the ignition advance angle of the first starting curve is set to be larger than that of the second starting curve, so that a magnetor is ignited by using the first starting curve in a low-temperature environment, and then is ignited by using the second starting curve in a low-temperature environment. When the conditions are met, the magnetor exits from the first starting curve and operates according to the second starting curve, and it is guaranteed that the magnetor can also be started in the low-temperature environment.

Description

Technical Field

[0001] The present application relates to the technical field of digital ignition devices, and in particular to an ignition method and system for easy starting of a cold engine. Background Art

[0002] At present, the commonly used single-cylinder piston engine ignition system mainly consists of three parts: magneto, high-voltage package and spark plug. The magneto consists of a magnetic circuit, a low-voltage circuit and a high-voltage circuit. The magnetic circuit includes a rotor that runs synchronously with the engine, the iron core is fixed at a position corresponding to the outer periphery of the rotor, the primary coil and the ignition coil are concentrically wound on the iron core, and the iron core is equipped with a permanent magnet. The magneto rotates with the engine. According to the principle of electromagnetic induction, a periodically changing magnetic flux is formed in the primary coil; the low-voltage circuit includes the primary coil, the breaker and the capacitor, which are used to generate a low-voltage induced current and disconnect the low-voltage circuit at an appropriate time to make the magnetic field of the low-voltage induced current disappear quickly; the high-voltage circuit includes the ignition coil and the distributor, which generates a high-voltage induced current, that is, high-voltage electricity, when the low-voltage circuit is disconnected, and sends the high-voltage electricity to the cylinder. That is, the function of the ignition system is to generate high-voltage electricity and generate high-voltage electric sparks in time to ignite the fresh oil-gas mixture in the cylinder to make the engine work.

[0003] The most basic working principle of a magnetic motor: a permanent magnet rotates in an iron core, and the primary coil on the iron core induces an electromotive force (called the primary potential). When the breaker contacts are closed, a current (called the primary current) is generated. When the breaker contacts suddenly open and the primary current is suddenly cut off, the secondary coil induces a relatively high electromotive force (called the secondary potential), causing the spark plug to spark. In order to obtain the strongest spark plug spark, the maximum secondary potential should be obtained; in order to obtain the maximum secondary potential, the breaker contacts should be closed when the primary potential is zero and open when the primary potential is maximum.

[0004] Traditional magneto digital ignition devices generally have only one ignition curve stored inside. Under normal circumstances, cold engine start is no problem, but in a cold environment, it may be difficult to start the cold engine. Therefore, for some high-latitude areas (such as Northeast China and Russia), the temperature is very low in winter, and it is necessary to solve the problem of cold engine start difficulty. Summary of the invention

[0005] Based on this, it is necessary to provide an ignition method and system for easy start of cold machines in low temperature and cold environment, which may cause the cold machine to be difficult to start. Therefore, for some high-latitude areas (such as Northeast China and Russia), where the temperature is very low in winter and the cold machine is difficult to start, an ignition method and system for easy start of cold machines are provided.

[0006] In one aspect, the present application provides an ignition method for easy start of a cold machine, the ignition method for easy start of a cold machine comprising:

[0007] Setting a first startup curve and a second startup curve;

[0008] Starting the magnetic motor, selecting a first starting curve, and driving the magnetic motor to work according to the first starting curve;

[0009] Monitor the speed of the magneto, and determine whether it is necessary to exit the first starting curve according to the speed of the magneto;

[0010] If it is necessary to exit the first starting curve, then exit the first starting curve and drive the magnetic motor to work according to the second starting curve.

[0011] On the other hand, the present application also provides an ignition system for easy start of a cold machine, the ignition system for easy start of a cold machine comprising:

[0012] Single chip microcomputer;

[0013] A sensor, used for acquiring the rotation speed of the magnetic motor, wherein the sensor is electrically connected to the single chip microcomputer;

[0014] A magnetic motor, electrically connected to the microcontroller;

[0015] An ignition device, the ignition device comprising an ignition circuit and an ignition coil, the single chip microcomputer being electrically connected to the magnetic motor, the single chip microcomputer storing a first starting curve and a second starting curve; the single chip microcomputer being used to execute the ignition method for easy cold engine starting as mentioned above;

[0016] Engine, the ignition device is connected to the cylinder of the engine through a high-voltage wire;

[0017] A piston is arranged at the top of the cylinder.

[0018] The present application relates to an ignition method and system for easy starting of a cold machine, by respectively setting a first starting curve and a second starting curve, wherein the ignition advance angle of the first starting curve is set to be larger than the ignition advance angle of the second starting curve, so that the magnetic motor first uses the first starting curve for ignition in a low-temperature environment, and when conditions are met, the magnetic motor exits the first starting curve and operates according to the second starting curve, thereby ensuring that the magnetic motor can also start in a low-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic flow chart of an ignition method for easy starting of a cold engine provided in one embodiment of the present application.

[0020] Figure 2 An ignition curve diagram of an ignition method for easy starting of a cold engine provided in one embodiment of the present application.

[0021] Figure 3 An ignition waveform curve diagram of an ignition method for easy starting of a cold engine provided in one embodiment of the present application.

[0022] Figure 4 A schematic diagram of the structure of an ignition system for easy starting of a cold engine provided in one embodiment of the present application.

[0023] Figure 5 An ignition system for easy cold start in the field of motorcycle ignition is provided in one embodiment of the present application.

[0024] Reference numerals:

[0025] 10-single chip microcomputer; 110-first port; 120-second port; 130-third port; 140-fourth port;

[0026] 150-fifth port; 20-sensor; 30-magneto; 40-ignition device; 410-ignition circuit;

[0027] 411-a first diode; 412-a second diode; 413-a third diode;

[0028] 414- fourth diode; 415- fifth diode; 421- single chip microcomputer power supply;

[0029] 422 - power supply for trigger circuit; 431 - first resistor; 432 - second resistor; 433 - third resistor;

[0030] 434 - fourth resistor; 441 - first capacitor; 442 - second capacitor; 443 - third capacitor;

[0031] 444-the fourth capacitor; 451-the energy storage capacitor; 452-the thyristor; 453-the watchdog circuit;

[0032] 454-4093 chip; 455-crystal oscillator; 456-signal shaper; 457-main switch;

[0033] 460-ignition coil; 50-engine; 510-cylinder; 520-spark plug; 530-piston;

[0034] 60-Oil and gas sources. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] The present application provides an ignition method and system for easy start of a cold machine. It should be noted that the ignition method for easy start of a cold machine provided by the present application is applicable to any type of ignition device.

[0037] like Figure 1 As shown, in one embodiment of the present application, the ignition method for easy starting of a cold engine includes:

[0038] S100, setting a first startup curve and a second startup curve.

[0039] S200, starting the magneto, selecting a first starting curve, and driving the magneto to work according to the first starting curve.

[0040] S300, monitoring the rotation speed of the magneto, and determining whether to exit the first starting curve according to the rotation speed of the magneto.

[0041] S400: If it is necessary to exit the first starting curve, then exit the first starting curve and drive the magnetic motor to work according to the second starting curve.

[0042] Specifically, the first startup curve and the second startup curve are in the same rectangular coordinate system, the abscissas of the first startup curve and the second startup curve are the rotation speed in r / min, and the ordinates of the first startup curve and the second startup curve are the ignition advance angle in degrees.

[0043] Definition of ignition advance angle: When the engine (gasoline engine) is working, the ignition timing has a great influence on the engine's working performance. Advance ignition means that the spark plug jumps before the piston reaches the compression top dead center, igniting the combustible mixture in the combustion chamber. From the ignition moment to the piston reaching the compression top dead center, the angle that the crankshaft rotates during this period is called the ignition advance angle. The ignition advance angle that enables the engine to achieve the best power, economy and best emissions is called the optimal ignition advance angle. The position of the compression top dead center is Figure 4 The piston top dead center position in.

[0044] In this embodiment, by setting the first starting curve and the second starting curve respectively, wherein the ignition advance angle of the first starting curve is set larger than the ignition advance angle of the second starting curve, the magnetic motor is first ignited using the first starting curve in a low temperature environment, and when the conditions are met, the magnetic motor exits the first starting curve and operates according to the second starting curve, thereby ensuring that the magnetic motor can also start in a low temperature environment.

[0045] In one embodiment of the present application, the first starting curve and the second starting curve use the same plane rectangular coordinate system, the horizontal coordinate of the plane rectangular coordinate system is the magnetic motor speed, and the vertical coordinate of the plane rectangular coordinate system is the ignition advance angle; after the magnetic motor is started, the speed of the magnetic motor gradually increases from 0, and the duration period in which the speed of the magnetic motor gradually increases from 0 is defined as an acceleration time period, and the acceleration time period includes multiple equally divided sub-acceleration time periods. In the first sub-acceleration time period, the average slope of the first starting curve is greater than the average slope of the second starting curve.

[0046] Specifically, the present application solves the problem of cold engine starting difficulty at low temperature by storing an additional ignition curve for starting inside the single chip microcomputer (such as Figure 2 As shown in the figure, different models will have different optimal ignition advance angles in actual situations. Figure 2 The ignition curves shown are examples only).

[0047] The average slope is the average of the slopes of each data point in a time period. For example, if the first startup curve has 10 data points in the first acceleration time period, namely data points A1, A2, ..., A10, then the slopes of the 10 data points KA1, KA2, ..., KA10 are obtained respectively, and then the average of KA1, KA2, ..., KA10 is calculated, and the average is used as the average slope of the first startup curve in the first acceleration time period. The method for calculating the slope of each data point is equal to the slope of the tangent line of the curve at that data point.

[0048] During the first acceleration time period, the calculation method of the average slope of the second startup curve is similar.

[0049] The ignition advance angle of the first starting curve mentioned in the above content is set to be larger than the ignition advance angle of the second starting curve. Specifically, it means that in the first sub-acceleration time period, the average slope of the first starting curve is greater than the average slope of the second starting curve. Through this setting, the magneto first uses the first starting curve for ignition in a low-temperature environment, and when the conditions are met, the magneto exits the first starting curve and operates according to the second starting curve, ensuring that the magneto can also start in a low-temperature environment.

[0050] like Figure 2 As shown, in the first acceleration time period, the average slope of the first startup curve is greater than the average slope of the second startup curve, which is displayed on the graph as the first startup curve being steeper than the second startup curve.

[0051] Under normal circumstances, if the ignition advance angle is large, the gas in the cylinder will burn in advance, which can generate more power, thereby pushing the piston upward, and the cold engine start is relatively easier. However, if the ignition advance angle is too large, the ignition time is too early, and the pressure in the cylinder has reached a large value when the piston is still moving to the top dead center. At this time, the direction of the gas pressure is opposite to the direction of the piston movement, which will have a counter-effect and make starting more difficult. Therefore, it is not the case that the larger the ignition advance angle, the better, but the ignition advance angle needs to be adjusted according to the actual situation.

[0052] In this embodiment, since the speed of the magneto is relatively low in the idle state, a smaller ignition advance angle is required to ensure stable operation at idle in order to ensure stability in the idle state. Based on the above reasons, in order to take into account both cold engine start and stable operation at idle, a first start curve and a second start curve are set inside the single chip microcomputer, and the first start curve is set to reach a larger ignition advance angle faster (i.e., the average slope of the first start curve is greater than the average slope of the second start curve), ensuring that the magneto can be started at low temperatures and cold engine is also easier.

[0053] The definition of the acceleration time period may be: the duration of the magnetic motor gradually increasing from 0 is the acceleration time period.

[0054] The acceleration time period includes a plurality of equally divided sub-acceleration time periods. For example, in this embodiment, the time taken for the speed to increase by 2000r / min is an acceleration time period. This is called the "equal division" in the equally divided sub-acceleration time period. It can be seen that this "equal division" is not the equal division of the time span. It can be understood that we need to have a large average slope of the curve and a very fast rise in the ignition advance angle in the first sub-acceleration time period, that is, the acceleration time period from 0-2000r / min. Therefore, this application sets the average slope of the first start curve to be greater than the average slope of the second start curve in the first sub-acceleration time period.

[0055] Since the curve itself has no slope, we calculate the average slope of the curve by taking the average of the slopes of the tangent lines at each point on the curve.

[0056] In an embodiment of the present application, in the first sub-acceleration time period, the average slope of the first startup curve is at least twice the average slope of the second startup curve.

[0057] Specifically, the first startup curve is a more radical and steeper startup curve than the second startup curve, and its setting purpose is to enable the magneto to quickly reach a larger ignition advance angle after startup. Therefore, in the first sub-acceleration time period of the first startup curve, the climbing acceleration of the ignition advance angle must be large enough to increase the climbing speed. This is the reason why the average slope of the first startup curve is set to be at least twice the average slope of the second startup curve in this embodiment.

[0058] In one embodiment of the present application, the S300 includes:

[0059] S310, monitoring the rotation speed of the magneto, and determining whether the rotation speed of the magneto is greater than or equal to a rotation speed threshold.

[0060] S320: If the rotation speed of the magnetic motor is greater than or equal to the rotation speed threshold, it is determined that the first startup curve needs to be exited.

[0061] S330: If the rotation speed of the magnetic motor is less than the rotation speed threshold, it is determined that there is no need to exit the first startup curve.

[0062] Specifically, in this embodiment, the magneto accelerates directly after starting, and the speed is greater than the internally set speed threshold, and the starting ignition curve can be immediately exited and switched to the normal ignition curve for ignition.

[0063] In this embodiment, the first starting curve is a starting ignition curve, that is, in a low temperature environment, the magneto is first started according to the first starting curve, and then the magneto is made to work according to the second starting curve.

[0064] The condition for exiting the first start-up curve in this embodiment is that the magneto reaches a speed threshold. When the magneto reaches the speed threshold, the magneto is controlled to exit the first start-up curve so that the magneto moves according to the second start-up curve.

[0065] Optionally, the speed threshold may be 7000 r / min (7000 revolutions per minute), see Figure 2 The illustrated embodiment.

[0066] In one embodiment of the present application, the S200 includes:

[0067] S210, selecting a first starting curve, and driving the piston to rotate according to the first starting curve.

[0068] S220, the timer starts timing, and the recorded time of the timer is recorded as the running time.

[0069] Specifically, the running time is generally set at about 20s-30s.

[0070] In this embodiment, the running time is a short time and can be adjusted according to demand. When the running time reaches the running time threshold, the magnetic motor exits the first starting curve and starts to move according to the second starting curve.

[0071] In one embodiment of the present application, the S300 further includes:

[0072] S340, determining whether the running time is greater than or equal to a running time threshold.

[0073] S350: If the running time is greater than or equal to the running time threshold, it is determined that the first startup curve needs to be exited.

[0074] S360: If the running time is less than the running time threshold, it is determined that there is no need to exit the first startup curve.

[0075] In this embodiment, when the running time of the piston reaches the set running time, the magnetic motor is controlled to exit the first starting curve, so that the magnetic motor moves according to the second starting curve.

[0076] Optionally, the run time may be 10 minutes.

[0077] In summary of the above two embodiments, it should be noted that there is no priority distinction between the running time and the speed threshold, and the first startup curve can be derived by satisfying any one of the conditions.

[0078] In one embodiment of the present application, the cold engine easy start ignition method further includes:

[0079] S500: If it is not necessary to exit the first starting curve, the magnetic motor is driven to continue to operate according to the first starting curve.

[0080] The present application also provides an ignition system for easy starting of a cold engine.

[0081] The ignition system for easy cold start applies the ignition method for easy cold start mentioned in any of the aforementioned embodiments. For the sake of brevity, all components, devices, apparatuses and other hardware appearing in this application are numbered in each embodiment of the ignition system for easy cold start, but not numbered in each embodiment of the ignition method for easy cold start, and will not be explained again later.

[0082] like Figure 4 As shown, in one embodiment of the present application, an ignition system for easy starting of a cold engine includes a single chip computer 10 , a sensor 20 , a magneto 30 , an ignition device 40 , an engine 50 and a piston 530 .

[0083] The sensor 20 is used to obtain the rotation speed of the magneto 30, and the sensor 20 is electrically connected to the single-chip microcomputer 10. The magneto 30 is electrically connected to the single-chip microcomputer 10. The ignition device 40 includes an ignition circuit 410 and an ignition coil 460, and the single-chip microcomputer 10 is electrically connected to the magneto 30. The single-chip microcomputer 10 stores a first start-up curve and a second start-up curve. The single-chip microcomputer 10 is used to execute the ignition method for easy start of a cold engine mentioned in any of the above embodiments. The ignition device is connected to the cylinder 510 of the engine 50 through a high-voltage line. The piston 530 is arranged at the top of the cylinder 510.

[0084] Specifically, the ignition coil 460 usually has two or more terminals: a power input terminal and at least one output terminal. The power input terminal is connected to the positive power supply of the vehicle, usually protected by a fuse or relay, ensuring that the correct wire gauge and connector are used. The output terminal is connected to the high-voltage wire of the spark plug 520, and each output terminal can correspond to a specific spark plug 520.

[0085] The ignition coil 460 includes a primary coil and a secondary coil. When the primary coil is energized, a magnetic field is generated. When the power is off, the secondary coil induces high voltage electricity. This high voltage electricity acts on the spark plug 520, generating an electric spark in the gap between its electrodes, thereby igniting the mixed oil and gas in the cylinder 510 of the engine 50.

[0086] Figure 4 The oil and gas source 50 is used to provide mixed oil and gas to the cylinder 510.

[0087] In this embodiment, the first startup curve and the second startup curve are stored by the single chip microcomputer 10. The first startup curve and the second startup curve can be adjusted according to actual conditions. Figure 2 shown.

[0088] like Figure 2 As shown, in one embodiment of the present application, the first startup curve and the second startup curve use the same plane rectangular coordinate system, the horizontal coordinate of the plane rectangular coordinate system is the magneto speed, and the vertical coordinate of the plane rectangular coordinate system is the ignition advance angle.

[0089] In this embodiment, the first startup curve and the second startup curve are in the same rectangular coordinate system, the horizontal coordinates of the first startup curve and the second startup curve are the rotation speed, the unit is r / min, and the vertical coordinates of the first startup curve and the second startup curve are the ignition advance angle, the unit is degree.

[0090] like Figure 2 As shown, in one embodiment of the present application, the first startup curve and the second startup curve intersect at an exit point.

[0091] In this embodiment, Figure 2 As shown, the horizontal coordinate of the exit point corresponds to 7000 r / min, that is, when the magneto reaches 7000 r / min, the magneto can exit the first starting curve and start working according to the second starting curve.

[0092] In one embodiment of the present application, a timer (not shown in the figure) is provided in the single chip microcomputer.

[0093] In this embodiment, the running time is calculated by a timer.

[0094] like Figure 3 As shown, in one embodiment of the present application, a piston waveform curve is also provided in the single chip microcomputer.

[0095] Specifically, the piston waveform curve is as follows: Figure 3 shown.

[0096] In this embodiment, when the ignition device is working, the charging coil cuts the magnetic flux lines to generate two charging waves, one of which is generally stored in the capacitor as energy and released during ignition to complete the ignition.

[0097] Figure 3 This charging wave signal is used as the time base for the MCU timer to determine the time. The timer stores the read time T in other registers. The MCU only needs to compare the actual read cycle with the internally set time to determine the current speed value (the conversion formula for speed and cycle is n=1 / T, the unit of n is s, and the unit of T is s), and set different ignition angles at the corresponding speed. Similarly, the time from the first falling edge of the first waveform to the first falling edge of the next waveform is also a cycle, and the same is true for the next one. Because different engines require different ignition angles and the flywheel keyway design is different, the choice of the time base edge needs to be determined according to the actual situation.

[0098] like Figure 3 As shown, in one embodiment of the present application, the piston waveform curve is a double wave curve, and the piston waveform curve includes multiple cycles, and the duration of one cycle is Figure 3 The T in it consists of a double wave, and a double wave consists of two single waves.

[0099] Figure 3 In the figure, the horizontal axis is time and the vertical axis is voltage. In the magneto ignition waveform, the change in voltage reflects the change in current.

[0100] In this embodiment, a double wave has two rising edges and two falling edges. A cycle is the time from the first rising edge of the first double wave to the first rising edge of the next double wave. The multiple cycles of the piston waveform curve are used to represent the specific conditions at different times when the piston is ignited.

[0101] The cold engine easy start ignition method and system provided by the present application can be applied to automobiles or motorcycles, or any vehicle that needs to start the engine. Due to the different structures of different types of vehicles, different brands of the same type of vehicles, and different engine structures, the present application does not specifically limit the specific structure of the ignition device, nor does it limit the specific structure, layout, and layout of the ignition circuit and ignition coil contained in the ignition device.

[0102] In order to make the cold engine easy to start ignition method provided by the present application clear, a structural schematic diagram of an ignition device used on a motorcycle is listed below, such as Figure 5 shown.

[0103] Figure 5This is an ignition system for easy cold start in the field of motorcycle ignition provided in one embodiment of the present application. However, it should be noted that this does not constitute a limitation on the present application, nor does it represent Figure 5 These specific components and their connection methods are the focus of protection of this application. Figure 5 It is only for the purpose of better explaining an implementation method provided by the present application for the ignition method for easy starting of a cold engine.

[0104] like Figure 5 As shown, the cold engine easy start ignition system applied to the motorcycle ignition field includes a single chip microcomputer 10, a sensor 20, a magneto 30, an ignition device 40, an engine 50, an ignition circuit 410 and ignition wire 420 coils.

[0105] The ignition circuit 410 includes a first diode 411, a second diode 412, a third diode 413, a fourth diode 414, a fifth diode 415, a single-chip microcomputer power supply 421, a trigger circuit power supply 422, a first resistor 431, a second resistor 432, a third resistor 433, a fourth resistor 434, a first capacitor 441, a second capacitor 442, a third capacitor 443, a fourth capacitor 444, a storage capacitor 451, a thyristor 452, a watchdog circuit 453, a 4093 chip 454, a crystal oscillator 455, a signal shaper 456, and a main switch 457.

[0106] By turning on the main switch 457, the entire ignition circuit 410 is powered on. After the ignition circuit 410 is powered on, the 4093 chip 454 outputs a high-level signal to reset the single-chip microcomputer 10. At this time, the single-chip microcomputer 10 starts the timer interrupt and regularly clears the watchdog circuit 453, so that the watchdog circuit 453 always outputs a high level to the third port 130 of the single-chip microcomputer. The sensor 20 obtains the speed of the magnetic motor and sends the speed to the single-chip microcomputer 10. The signal shaper 456 shapes the magnetic motor trigger signal to eliminate noise, and then inputs it to the second port 120 of the single-chip microcomputer 10.

[0107] The second port 120 is the external interrupt INT1 pin of the single-chip microcomputer 10, so that the single-chip microcomputer 10 can execute the INT1 interrupt subroutine. The single-chip microcomputer 10 reads the speed value, calculates the delay value according to the speed value, and after the delay time is up, the first port 120 outputs a trigger signal for controlling the thyristor 452 to change its working state. After the thyristor 452 receives the trigger signal to change its working state, the secondary of the ignition coil 460 induces a high voltage, and the spark plug 520 generates a discharge spark to ignite the combustible mixture in the engine 50, driving the engine 50 to operate.

[0108] The first port 110 is a P1.0 port, the second port 120 is an INT1 port, the third port 130 is an RST port, the fourth port 140 is a D7 port, and the fifth port 150 is a P1.1 port.

[0109] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0110] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An ignition method for easy starting of a cold engine, applied to a magnetic motor, characterized in that: The ignition method for easy starting of a cold machine comprises: Setting a first startup curve and a second startup curve; Starting the magnetic motor, selecting a first starting curve, and driving the magnetic motor to work according to the first starting curve; Monitor the speed of the magneto, and determine whether it is necessary to exit the first starting curve according to the speed of the magneto; If it is necessary to exit the first starting curve, then exit the first starting curve and drive the magnetic motor to work according to the second starting curve.

2. The ignition method for easy starting of a cold engine according to claim 1, characterized in that: The first starting curve and the second starting curve use the same plane rectangular coordinate system, the horizontal coordinate of the plane rectangular coordinate system is the magneto speed, and the vertical coordinate of the plane rectangular coordinate system is the ignition advance angle; after the magneto is started, the speed of the magneto gradually increases from 0, and the duration period in which the speed of the magneto gradually increases from 0 is defined as an acceleration time period, and the acceleration time period includes multiple equally divided sub-acceleration time periods. In the first sub-acceleration time period, the average slope of the first starting curve is greater than the average slope of the second starting curve.

3. The ignition method for easy starting of a cold engine according to claim 1, characterized in that: In the first acceleration sub-time period, the average slope of the first startup curve is at least twice the average slope of the second startup curve.

4. The ignition method for easy starting of a cold machine according to claim 2 or 3, characterized in that: The monitoring of the rotation speed of the magneto and determining whether to exit the first starting curve according to the rotation speed of the magneto include: monitoring the rotation speed of the magneto to determine whether the rotation speed of the magneto is greater than or equal to a rotation speed threshold; If the speed of the magnetic motor is greater than or equal to the speed threshold, it is determined that the first starting curve needs to be exited; If the rotation speed of the magneto is less than the rotation speed threshold, it is determined that there is no need to exit the first starting curve.

5. The ignition method for easy starting of a cold engine according to claim 3, characterized in that: The step of selecting the first starting curve and driving the magnetic motor to operate according to the first starting curve includes: Selecting a first starting curve, driving the magnetic motor to work according to the first starting curve; The timer starts timing, and the time recorded by the timer is recorded as the running time.

6. The ignition method for easy starting of a cold engine according to claim 5, characterized in that: The monitoring of the rotation speed of the magneto and judging whether to exit the first starting curve according to the rotation speed of the magneto also include: Determine whether the running time is greater than or equal to the running time threshold; If the running time is greater than or equal to the running time threshold, it is determined that the first startup curve needs to be exited; If the running time is less than the running time threshold, it is determined that there is no need to exit the first startup curve.

7. The ignition method for easy starting of a cold engine according to claim 5 or 6, characterized in that: The method further comprises: If it is not necessary to exit the first starting curve, the driving magneto continues to work according to the first starting curve.

8. An ignition system for easy starting of a cold engine, characterized in that: The ignition system for easy starting of a cold engine comprises: Single chip microcomputer; A sensor, used for acquiring the rotation speed of the magnetic motor, wherein the sensor is electrically connected to the single chip microcomputer; A magnetic motor, electrically connected to the single-chip computer; An ignition device, the ignition device comprising an ignition circuit and an ignition coil, the single chip microcomputer being electrically connected to the magnetic motor, the single chip microcomputer storing a first starting curve and a second starting curve; the single chip microcomputer being used to execute the ignition method for easy starting of a cold engine as claimed in any one of claims 1 to 7; Engine, the ignition device is connected to the cylinder of the engine through a high-voltage wire; A piston is arranged at the top of the cylinder.

9. The ignition system for easy starting of a cold engine according to claim 8, characterized in that: The first startup curve and the second startup curve use the same plane rectangular coordinate system, the abscissa of the plane rectangular coordinate system is the magneto speed, and the ordinate of the plane rectangular coordinate system is the ignition advance angle.

10. The ignition system for easy starting of a cold engine according to claim 9, characterized in that: The first startup curve intersects the second startup curve at an exit point.

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