Method and system for starting a motorcycle engine
By controlling the reverse and forward operation of the engine start control system, the problem of installing positioning sensors in motorcycle engine starting has been solved, enabling low-cost and low-power engine starting, and avoiding wire overheating and increased system complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MOTIVE POWER IND CO LTD
- Filing Date
- 2025-10-16
- Publication Date
- 2026-06-23
AI Technical Summary
Existing technology requires the installation of additional positioning sensors to ensure the crankshaft is in the optimal pre-start position when starting a motorcycle engine, which increases costs and system complexity. At the same time, high current starting may cause wires to overheat and increase electricity costs.
The engine start control system uses a controller and power supply to control an integrated starter generator to operate in both reverse and forward directions. By combining the control of constant torque in reverse rotation and constant current in forward rotation, the system avoids the need to install additional positioning sensors, thus achieving low-cost starting of the motorcycle engine.
Without increasing system complexity and cost, a motorcycle engine can be successfully started with a small current, reducing the risk of wire overheating and shortening start-up time.
Smart Images
Figure CN122257948A_ABST
Abstract
Description
Technical Field
[0001] This application relates to a method and system for starting a motorcycle engine. Background Technology
[0002] Traditionally, motorcycles use carbon brush motors to start the engine so that it can function properly after starting. However, due to factors such as gas compression resistance, valve spring resistance, and frictional resistance in the motorcycle engine, the carbon brush motor needs to use reduction gears to amplify the torque in order to drive the crankshaft of the motorcycle engine and thus start the engine.
[0003] Subsequently, to reduce weight and improve the starting experience, an integrated starter and generator (ISG) is practically adopted. Its key feature is that the flywheel magneto, originally coaxial with the motorcycle engine's crankshaft, is used as the aforementioned carbon brush motor. In this way, when the user wants to start the motorcycle engine, energy is injected into the flywheel magneto, turning it into a motor that drives the motorcycle engine's crankshaft, thus starting the engine smoothly. In other words, the integrated starter and generator can be used to drive the motorcycle engine's crankshaft, allowing it to reach a certain speed for combustion and thus starting the motorcycle engine.
[0004] It should be noted that during the operation of a motorcycle engine's crankshaft, the crankshaft encounters frictional resistance, compression resistance, and valve spring resistance. This necessitates sufficient torque to overcome these resistances and successfully start the engine. Since the integrated starter generator is coaxial with the engine's crankshaft, there is no extra space to install a reduction gear to increase the crankshaft's torque. This necessitates a higher current input to the integrated starter generator to increase the crankshaft's torque and start the engine. However, while increasing the current allows for successful engine starting, it also leads to problems such as overheating of the wiring and / or increased electricity costs.
[0005] In the prior art, for example, the patent document No. 390939 of Taiwan Patent Publication filed by Honda Motor Co., Ltd. teaches that before starting the motorcycle engine, the crankshaft of the motorcycle engine is rotated to the optimal pre-start position by using an integrated starter generator, and then the integrated starter generator is driven to run in the forward direction so as to start the motorcycle engine smoothly. Summary of the Invention
[0006] Although a motorcycle engine can be started smoothly by being in the optimal pre-start position and using a small amount of current through an integrated starter generator, while reducing the heat generated when the wires are energized and / or reducing the time required to start, all of this depends on the premise that the crankshaft of the motorcycle engine has been turned to the optimal pre-start position in advance.
[0007] In other words, in order to start a motorcycle engine with a smaller current, existing technology requires additional crankshaft positioning sensors or other devices capable of confirming the crankshaft position of the motorcycle engine to be installed in specific locations. For example, existing technology requires additional positioning sensors to be installed on the rotor, stator, and crankshaft to ensure that the relative positions between the rotor, stator, and crankshaft are clearly defined, thereby ensuring that the crankshaft of the motorcycle engine is in the optimal pre-start position.
[0008] However, the additional positioning sensors used in existing technologies can lead to problems such as increased costs for each positioning sensor, required installation space, and / or increased design complexity of the entire system. On the other hand, not using additional positioning sensors can result in problems such as excessive starting current, wire overheating, and / or increased electricity costs.
[0009] Therefore, how to solve the aforementioned problems encountered in starting motorcycle engines and effectively start motorcycle engines at a lower cost has become an urgent problem that the technical field to which this application pertains hopes to solve.
[0010] To address the aforementioned problems, this application provides a method for starting a motorcycle engine. The method is executed by an engine starting control system, which includes a controller, a power supply coupled to the controller, and an integrated starter generator coupled to both the controller and the power supply. The integrated starter generator in the engine starting control system is coupled to the motorcycle engine. The method includes the following steps: driving the integrated starter generator to reverse at a reverse torque value during a reverse time period via the controller, until the reverse time ends, wherein the reverse torque of the integrated starter generator driven by the reverse torque value is greater than the frictional resistance value. And less than the maximum resistance value of the valve spring resistance; after the integrated starter generator stops reversing, the controller controls the power supply device to output a forward constant current to the integrated starter generator to drive the integrated starter generator to operate in the forward direction, wherein the forward torque of the integrated starter generator driven by the current of the forward constant current is greater than the total of the friction resistance value and the current resistance value of the valve spring resistance; and during the forward operation of the integrated starter generator, when the forward angular velocity value of the motorcycle engine driven by the integrated starter generator is greater than or equal to the expected value, the motorcycle engine will be started by the integrated starter generator.
[0011] In some embodiments, the method for starting a motorcycle engine further includes the following steps: during the forward operation of the integrated starter generator, when the forward angular velocity value of the motorcycle engine driven by the integrated starter generator is less than the expected value, the integrated starter generator is driven again to reverse operation with the reverse constant torque value by the controller; and during the reverse operation of the integrated starter generator again, when the reverse driving force of the integrated starter generator and the exhaust valve spring resistance reach a force balance static state, the power supply device is controlled again to output the forward constant current to the integrated starter generator by the controller to drive the integrated starter generator to forward operation again.
[0012] In some embodiments, the method for starting a motorcycle engine further includes the following steps: receiving the rotation angle value of the integrated starter generator via the controller; when the integrated starter generator stops reversing at the end of the reversal time, determining via the controller whether the rotation angle value of the integrated starter generator is greater than a preset value for engine wear angle; and when the rotation angle value of the integrated starter generator is greater than the preset value for engine wear angle, determining via the controller that the motorcycle engine is in an engine wear state.
[0013] In some embodiments, the method for starting a motorcycle engine further includes the following steps: receiving the rotation angle value of the integrated starter generator via the controller; when the integrated starter generator is operating in the forward direction, determining via the controller whether the rotation angle value of the integrated starter generator is less than a preset value of engine jam angle within a determination time; and when the rotation angle value of the integrated starter generator is less than the preset value of engine jam angle within the determination time, determining via the controller that the motorcycle engine is in an engine jammed state.
[0014] In some embodiments, the engine start control system does not include a crankshaft positioning sensor.
[0015] Furthermore, this application also provides a system for starting a motorcycle engine, wherein the system is coupled to the motorcycle engine, the system comprising: a controller; a power supply coupled to the controller; and an integrated starter generator coupled to the controller, the power supply, and the motorcycle engine respectively; wherein the system is configured to perform any of the methods described in this application for starting a motorcycle engine in order to start the motorcycle engine.
[0016] In some embodiments, the system for starting a motorcycle engine does not include a crankshaft positioning sensor.
[0017] Therefore, the technical means provided in this application can produce advantageous effects that were not achievable with prior art. Specifically, the advantageous effect that this application can achieve is that it can start the motorcycle engine with a small amount of current without the need to install additional positioning sensors, thereby effectively reducing the cost of starting the motorcycle engine. Attached Figure Description
[0018] Figure 1 This is a block diagram illustrating the system for starting a motorcycle engine according to this application.
[0019] Figure 2 This is a flowchart illustrating a method for starting a motorcycle engine according to a first embodiment of this application.
[0020] Figure 3 It is a waveform diagram used to illustrate the relationship between crankshaft position and crankshaft resistance.
[0021] Figure 4 It is a waveform diagram used to illustrate the relationship between crankshaft position and crankshaft resistance.
[0022] Figure 5 This is a flowchart illustrating a method for starting a motorcycle engine according to a second embodiment of this application.
[0023] Figure 6 It is a waveform diagram used to illustrate the relationship between crankshaft position and crankshaft resistance.
[0024] Figure 7 This is a flowchart illustrating a method for starting a motorcycle engine according to a third embodiment of this application.
[0025] Figure 8 This is a flowchart illustrating a method for starting a motorcycle engine according to a fourth embodiment of this application.
[0026] Figure Labels 100 system 110 controller 120 power supply unit 130 Integrated Starter Generator 200 motorcycle engine Steps S210, S220, and S230 Steps S510 and S520 S710, S720, S730 steps S810, S820, S830 steps Detailed Implementation This application will be described in detail through the embodiments described below and the accompanying drawings, so as to help those skilled in the art understand the purpose, features and effects of this application.
[0027] It should be noted that the various steps described in this application may be performed sequentially, in reverse order, or by appropriately changing or skipping the order during control processing. It should be noted that "the first step may be performed after the second step" as described in this application may mean "the first step is performed directly after the second step is performed" and / or "other steps (e.g., the third step) are performed after the second step is performed, and then the first step is performed."
[0028] Furthermore, it should be noted that in the description of this application, terms such as "first," "second," and "third" are used to distinguish between elements, rather than to limit the elements themselves or indicate a specific order of elements. It should also be noted that in the description below, the same elements or steps may be represented by the same numbering.
[0029] Furthermore, the term "coupled" as described in this application may be interpreted as "directly connected" and / or "indirectly connected". Specifically, "the first element is configured to be coupled to the second element" may be interpreted as "the first element is configured to be directly connected to the second element" and / or "the first element is configured to be indirectly connected to the second element".
[0030] Please refer to Figure 1 , Figure 1 This is a block diagram illustrating the system 100 for starting a motorcycle engine according to this application. Figure 1 As shown, the system 100 for starting a motorcycle engine (also referred to as the engine starting control system described in this application) may include a controller 110, a power supply 120, and an integrated starter generator 130, thereby starting the motorcycle engine 200 by means of the system 100 for starting the motorcycle engine. More specifically, since the integrated starter generator 130 in the system 100 for starting the motorcycle engine is coupled to the motorcycle engine 200, the system 100 can start the motorcycle engine 200 by means of the integrated starter generator 130 under the control of the controller 110. The various components will be described in more detail below.
[0031] The controller 110 is configured to be coupled to the power supply unit 120 and the integrated starter generator 130, respectively, in order to control the current output by the power supply unit 120 and / or the operating mode of the integrated starter generator 130. In some embodiments, the controller 110 may be a finished product known to those skilled in the art; furthermore, the controller 110 may be coupled to the power supply unit 120 and the integrated starter generator 130, respectively, using transmission lines known to those skilled in the art.
[0032] The power supply device 120 is configured to output current corresponding to the received control command to the integrated starter generator 130 according to the control command from the controller 110, such as reverse constant current or forward constant current, thereby driving the integrated starter generator 130 to operate in reverse or forward. In some embodiments, the power supply device 120 may be a finished product known to those skilled in the art.
[0033] The integrated starter generator 130 is configured to operate according to control commands sent by the controller 110 and / or the current output by the power supply device 120, such as reversing or reversing, thereby driving the motorcycle engine 200 to rotate. In some embodiments, the integrated starter generator 130 may be a finished product known to those skilled in the art.
[0034] The motorcycle engine 200 is configured to be coupled to an integrated starter generator 130 so that it can be started by the rotation of the integrated starter generator 130, thereby enabling the motorcycle engine 200 to perform its function. In some embodiments, the motorcycle engine 200 may be a finished product known to those skilled in the art, such as a 125cc single-cylinder four-stroke gasoline engine, but is not limited thereto.
[0035] The aforementioned system 100 for starting a motorcycle engine can perform any of the methods for starting a motorcycle engine described in this application, so that the motorcycle engine 200 can be started with a small current without the need for additional installation of a positioning sensor such as a crankshaft positioning sensor, thereby effectively reducing the cost of starting the motorcycle engine 200. In other words, the system 100 for starting a motorcycle engine eliminates the need for installing a crankshaft positioning sensor, thereby reducing the system 100's construction cost, installation space and / or design complexity, and starting the motorcycle engine 200 with a small current, thereby reducing electricity costs and avoiding the effects of wire overheating.
[0036] Furthermore, in this configuration, system 100 also has the advantage of model adaptation, that is, the integrated starter generator 130 does not need to be installed in a specific position with the motorcycle engine 200.
[0037] Additionally, in some embodiments, the system 100 for starting the motorcycle engine may not include a crankshaft positioning sensor (not shown). In other words, even if the system 100 does not include a crankshaft positioning sensor, the system 100 can still start the motorcycle engine 200 with a small amount of current.
[0038] Please refer to Figure 2 , Figure 2 This is a flowchart illustrating a method for starting a motorcycle engine according to a first embodiment of this application. Figure 2 For example, a method for starting a motorcycle engine can be as follows: Figure 1 The system 100 for starting a motorcycle engine shown is executed, and the method may include steps S210, S220 and S230. Each step will be described in more detail below.
[0039] In some embodiments, step S220 may be executed after step S210, and step S230 may be executed after step S220.
[0040] In step S210, the controller 110 in system 100 drives the integrated starter generator 130 to operate in reverse at a reverse torque value during the reverse rotation time until the reverse rotation time ends. The reverse torque of the integrated starter generator 130 driven by the reverse torque value is greater than the frictional resistance value and less than the maximum resistance value of the valve spring resistance. Thus, the integrated starter generator 130 will continue to operate in reverse during the reverse rotation time until the reverse rotation time ends, at which point the integrated starter generator 130 will stop operating in reverse. This reverse rotation during this period drives the crankshaft of the motorcycle engine 200 to a specific position. In other words, by executing step S210, the controller 110 can drive the integrated starter generator 130 to operate in reverse, thereby driving the crankshaft of the motorcycle engine 200 to the position described later. Figure 4 The valve spring resistance in the air intake section shown is located at the rear edge, thereby reducing the resistance that needs to be overcome to start the motorcycle engine 200.
[0041] In some embodiments, the reversal time can be preset to a time value of, for example, less than or equal to 0.5 seconds, but is not limited thereto. Additionally, in some embodiments, the reversal torque value can be preset to a value such that the reversal torque generated by the integrated starter generator 130 is greater than the frictional resistance value of the crankshaft of the motorcycle engine 200 and less than the maximum resistance value of the valve spring resistance of the crankshaft of the motorcycle engine 200. Specifically, the reversal torque value can be, for example, a torque value between 3 and 4 Newton-meters (N•m), but is not limited thereto.
[0042] Taking the aforementioned 125cc single-cylinder gasoline four-stroke engine motorcycle engine 200 as an example, the reverse time can be preset to, for example, 0.5 seconds, and the reverse torque value can be preset to, for example, 3 Nm or 4 Nm, but is not limited to these.
[0043] It should be noted that the aforementioned reversal time can be set to different time values depending on the motorcycle engine 200; similarly, the aforementioned reversal torque value can also be set to different torque values depending on the motorcycle engine 200.
[0044] In step S220, after the integrated starter generator 130 stops reversing, the controller 110 controls the power supply device 120 to output a forward constant current to the integrated starter generator 130 to drive it to rotate in the forward direction. The forward torque of the integrated starter generator 130 driven by the forward constant current is greater than the sum of the frictional resistance and the current resistance of the valve spring. In other words, after step S210 is completed, the integrated starter generator 130 will stop reversing due to the termination of the reversal time and will enter a state of stopping and waiting to start. By executing step S220, the controller 110 controls the power supply device 120 to output a forward constant current to the integrated starter generator 130, thereby driving the integrated starter generator 130 to rotate in the forward direction and rotating the crankshaft of the motorcycle engine 200 to start the motorcycle engine 200.
[0045] In some embodiments, the aforementioned forward constant current can be preset to allow the forward torque generated by the integrated starter generator 130 to be greater than the sum of the frictional resistance value of the crankshaft of the motorcycle engine 200 and the current resistance value of the valve spring resistance of the crankshaft of the motorcycle engine 200. The forward constant current can be, for example, a current value between 60 and 80 amperes, but is not limited thereto.
[0046] Taking the aforementioned 125cc single-cylinder four-stroke gasoline engine motorcycle engine 200 as an example, the forward rotation constant current can be preset to, for example, 60 amps, 70 amps, or 80 amps, but is not limited to these. It should be noted that the forward rotation constant current can also be set to different current values depending on the motorcycle engine 200.
[0047] In step S230, during the forward operation of the integrated starter generator 130, when the forward angular velocity of the motorcycle engine 200 driven by the integrated starter generator 130 is greater than or equal to the expected value, the motorcycle engine 200 will be started by the integrated starter generator 130. In other words, as the integrated starter generator 130 operates forward and drives the crankshaft of the motorcycle engine 200 to rotate, if the forward angular velocity of the crankshaft of the motorcycle engine 200 driven by the integrated starter generator 130 is greater than or equal to the expected value, the motorcycle engine 200 will be started by the integrated starter generator 130, thereby enabling the motorcycle engine 200 to perform its function, that is, enabling the motorcycle engine 200 to successfully ignite and operate.
[0048] In some embodiments, the expected value may be, for example, an angular velocity of 47 radians per second (47 rad / s) or 450 revolutions per minute (450 RPM), but is not limited thereto. Taking the aforementioned 125cc single-cylinder gasoline four-stroke motorcycle engine 200 as an example, the expected value may be, for example, 450 RPM, but is not limited thereto. It should be noted that the aforementioned expected value may also vary depending on the motorcycle engine 200.
[0049] After the motorcycle engine 200 is successfully ignited, the motorcycle engine 200 will automatically rise to the idle speed of 1,500 revolutions per minute (1,500 RPM).
[0050] With such Figure 2 The steps shown allow the crankshaft of the motorcycle engine 200 to be driven to a position with less resistance, enabling it to rotate with a smaller current, thus successfully starting the motorcycle engine 200. This allows the motorcycle engine 200 to start with a smaller current without the need for additional positioning sensors such as crankshaft positioning sensors, effectively reducing the cost of starting the motorcycle engine 200.
[0051] Please refer to Figure 3 and Figure 4 , Figure 3 and Figure 4 These are waveform diagrams illustrating the relationship between crankshaft position and crankshaft resistance.
[0052] As the speed of the motorcycle engine 200 increases, the resistance of the crankshaft valve springs in the motorcycle engine 200 usually also increases. When the motorcycle engine 200 is turned off, most of the remaining rotational inertia of the crankshaft will cause the crankshaft to stop at a position similar to... Figure 3 The valve spring resistance at the leading edge of the second exhaust section, as shown, is a position that is quite unfavorable for starting the motorcycle engine 200. Specifically, this position easily causes the integrated starter generator 130 to require a larger current and / or more time to successfully start the motorcycle engine 200. More specifically, this position requires the integrated starter generator 130 to have greater torque to overcome the combined frictional resistance and the maximum resistance of the valve spring resistance before the remaining torque can be used to accelerate the flywheel magneto. This allows the flywheel magneto to generate sufficient speed and moment of inertia to overcome compression resistance, enabling the motorcycle engine 200 to ignite and operate normally.
[0053] To overcome the aforementioned situation, by executing as follows Figure 2The step S210 shown will allow the crankshaft of the motorcycle engine 200 to be reversed via the integrated starter generator 130, thus... Figure 3 The leading edge of the valve spring resistance in the second exhaust section shown is driven to, as... Figure 4 The valve spring resistance in the intake section shown is located at the rear edge, which reduces the resistance that needs to be overcome to start the motorcycle engine 200. This allows the motorcycle engine 200 to be started with a smaller current without the need for additional positioning sensors such as crankshaft positioning sensors, thereby effectively reducing the cost of starting the motorcycle engine 200.
[0054] Please refer to Figure 5 , Figure 5 This is a flowchart illustrating a method for starting a motorcycle engine according to a second embodiment of this application. Figure 5 For example, a method for starting a motorcycle engine can be as follows: Figure 1 The system 100 for starting a motorcycle engine shown is executed, and the method may include, for example, Figure 2 The steps S210, S220, and S230 are shown, and further include steps S510 and S520. Hereinafter, specific steps will be described for each step. Figure 5 The steps further included in the document will be explained in more detail.
[0055] In some embodiments, step S510 may be executed after step S220, and step S520 may be executed after step S510.
[0056] In step S510, during the forward operation of the integrated starter generator 130, if the forward angular velocity of the motorcycle engine 200 driven by the integrated starter generator 130 is less than the expected value, the controller 110 drives the integrated starter generator 130 again to operate in the reverse direction with a reverse torque value. More specifically, although the crankshaft of the motorcycle engine 200 mostly stops at a position similar to... Figure 3 The second exhaust zone is shown at the leading edge of the valve spring resistance, but in rare cases it may still stop as described later. Figure 6The rear edge of the valve spring resistance in the first exhaust section and the front edge of the valve spring resistance in the intake section cause the forward angular velocity of the motorcycle engine 200 driven by the integrated starter generator 130 during forward operation to be less than the expected value (e.g., an angular velocity of 47 rad / s or 450 RPM, but not limited thereto). To resolve this situation, by executing step S510, the controller 110 will drive the integrated starter generator 130 to reverse operation again with the aforementioned reverse torque value (e.g., a torque value between 3 and 4 Newton-meters, but not limited thereto), so that the crankshaft of the motorcycle engine 200 can be driven to a specific position again via reversal, i.e., as described later. Figure 6 The valve spring resistance in the first exhaust zone is held at the stop position by a certain torque on the trailing edge.
[0057] In step S520, during the period when the integrated starter generator 130 is rotating in reverse again, when the reverse driving force of the integrated starter generator 130 and the exhaust valve spring resistance reach a force balance and remain stationary state, the controller 110 controls the power supply device 120 to output a forward constant current to the integrated starter generator 130 again, so as to drive the integrated starter generator 130 to rotate in the forward direction again. In other words, as the integrated starter generator 130 rotates in reverse again and drives the crankshaft of the motorcycle engine 200 to rotate, if the reverse driving force of the integrated starter generator 130 and the exhaust valve spring resistance reach a force balance and remain stationary state (which causes the crankshaft of the motorcycle engine 200 to stop as described later), Figure 6 If the valve spring resistance of the first exhaust section is held at the stop position by a certain torque at the trailing edge, then the controller 110 will immediately control the power supply device 120 to output the aforementioned forward constant current (e.g., a current value between 60 and 80 amps, but not limited thereto) to the integrated starter generator 130 again, so as to drive the integrated starter generator 130 to run forward again, thereby enabling the motorcycle engine 200 to be started by the torque generated when the integrated starter generator 130 is running forward and the reaction force of the exhaust valve spring resistance, etc.
[0058] With such Figure 5 The steps shown enable the crankshaft of the motorcycle engine 200 to rotate with a small current, regardless of which valve spring resistance it is stopped at when the engine is off, thus smoothly starting the motorcycle engine 200. In this way, the motorcycle engine 200 can be started with a small current without the need for additional positioning sensors such as crankshaft positioning sensors, effectively reducing the cost of starting the motorcycle engine 200 and ensuring reliable starting.
[0059] Please refer to Figure 6 , Figure 6 It is a waveform diagram used to illustrate the relationship between crankshaft position and crankshaft resistance.
[0060] In practice, when a motorcycle engine's crankshaft is turned off, it will stop at the leading edge of the valve spring resistance, with most of it stopping at something like... Figure 3 The second exhaust zone is shown at the leading edge of the valve spring resistance, but a small portion will stop between two successive valve spring resistances, i.e., as shown... Figure 6 The rear edge of the valve spring resistance in the first exhaust section and the front edge of the valve spring resistance in the intake section will cause the forward angular velocity of the motorcycle engine 200 driven by the integrated starter generator 130 during forward operation to be less than the expected value.
[0061] To overcome the aforementioned situation, by executing as follows Figure 5 The step S510 shown will allow the crankshaft of the motorcycle engine 200 to be driven again via the reverse rotation of the integrated starter generator 130, as shown. Figure 6 The valve spring resistance in the first exhaust section, as shown, is held at the stop position by a constant torque on its trailing edge. In this way, it is possible to utilize... Figure 6 The acceleration zone, as shown, is increased by the pre-compression stroke of the valve spring between the constant torque stop position and the variable torque stop position to start the motorcycle engine 200.
[0062] Please refer to Figure 7 , Figure 7 This is a flowchart illustrating a method for starting a motorcycle engine according to a third embodiment of this application. Figure 7 For example, a method for starting a motorcycle engine can be as follows: Figure 1 The system 100 for starting a motorcycle engine shown is executed, and the method may include, for example, Figure 2 The steps S210, S220, and S230 shown are further included, along with steps S710, S720, and S730. The following will focus on each of these steps. Figure 7 The steps further included in the document will be explained in more detail.
[0063] In step S710, the controller 110 receives the rotation angle value of the integrated starter generator 130. In some embodiments, step S710 may be executed immediately after step S210; alternatively, step S710 may be executed continuously, and is not limited to being executed only after a certain step. In other words, by executing step S710, the controller 110 can receive the rotation angle value of the integrated starter generator 130 from the integrated starter generator 130.
[0064] In step S720, when the integrated starter generator 130 stops reversing at the end of the reversal time, the controller 110 determines whether the rotation angle value of the integrated starter generator 130 is greater than a preset engine wear angle value. In some embodiments, step S720 may be executed after steps S210 and S710. More specifically, after step S210 is completed, the controller 110 can determine whether the rotation angle value of the integrated starter generator 130 is greater than the preset engine wear angle value based on the rotation angle value of the integrated starter generator 130 received by executing step S710, so as to autonomously check whether the motorcycle engine 200 is in an engine wear state. In some embodiments, the preset wear angle value may be preset to, for example, 300 degrees, but is not limited thereto.
[0065] In step S730, when the rotation angle of the integrated starter generator 130 is greater than the preset engine wear angle, the controller 110 determines that the motorcycle engine 200 is in an engine wear state. In some embodiments, step S730 may be executed after step S720. In other words, when the rotation angle of the integrated starter generator 130 is greater than the aforementioned preset engine wear angle, the controller 110 can determine that the motorcycle engine 200 is in an engine wear state, so as to remind the user and / or maintenance personnel to take corresponding actions; conversely, when the rotation angle of the integrated starter generator 130 is less than or equal to the aforementioned preset engine wear angle, the controller 110 can determine that the motorcycle engine 200 is not in an engine wear state, that is, in a normal state.
[0066] With such Figure 7 The steps shown enable the motorcycle engine 200 to be automatically checked for engine wear during the start-up process, thereby promptly alerting the user and / or maintenance personnel to take appropriate action and avoid damage and / or inconvenience caused by engine wear.
[0067] Please refer to Figure 8 , Figure 8 This is a flowchart illustrating a method for starting a motorcycle engine according to a fourth embodiment of this application. Figure 8 For example, a method for starting a motorcycle engine can be as follows: Figure 1 The system 100 for starting a motorcycle engine shown is executed, and the method may include, for example, Figure 2 The steps S210, S220, and S230 shown are further included, along with steps S810, S820, and S830. The following will focus on each of these steps. Figure 8 The steps further included in the document will be explained in more detail.
[0068] In step S810, the controller 110 receives the rotation angle value of the integrated starter generator 130. In some embodiments, step S810 may be executed immediately after step S220; alternatively, step S810 may be executed continuously, and is not limited to being executed only after a certain step. In other words, by executing step S810, the controller 110 can receive the rotation angle value of the integrated starter generator 130 from the integrated starter generator 130.
[0069] In step S820, when the integrated starter generator 130 is operating in the forward direction, the controller 110 determines whether the rotation angle value of the integrated starter generator 130 is less than the preset engine jam angle value within a certain time period. In some embodiments, step S820 may be executed after steps S220 and S810. More specifically, as the integrated starter generator 130 operates in the forward direction, the controller 110 can determine whether the rotation angle value of the integrated starter generator 130 is less than the preset engine jam angle value within a certain time period based on the rotation angle value of the integrated starter generator 130 received by executing step S810, so as to autonomously check whether the motorcycle engine 200 is in an engine jammed state.
[0070] In some embodiments, the aforementioned determination time may be preset to, for example, 0.5 seconds, but is not limited thereto. In some embodiments, the aforementioned engine jam angle preset value may be determined based on the number of rotor pole pairs of the integrated starter generator 130, that is, the engine jam angle preset value may be preset to the result of 360 degrees divided by the aforementioned number of rotor pole pairs (e.g., 8 pairs) (e.g., 45 degrees), but is not limited thereto.
[0071] In step S830, when the rotation angle of the integrated starter generator 130 is less than the preset engine jam angle within the judgment time, the controller 110 determines that the motorcycle engine 200 is in an engine jammed state. In some embodiments, step S830 may be executed after step S820. In other words, when the rotation angle of the integrated starter generator 130 is less than the preset engine jam angle within the aforementioned judgment time, the controller 110 can determine that the motorcycle engine 200 is in an engine jammed state, so as to remind the user and / or maintenance personnel to take corresponding actions; conversely, when the rotation angle of the integrated starter generator 130 is greater than or equal to the preset engine jam angle within the aforementioned judgment time, the controller 110 can determine that the motorcycle engine 200 is not in an engine wear state, that is, in a normal state.
[0072] With such Figure 8The steps shown enable the system to automatically check for engine jamming during the start-up process of the motorcycle engine 200, thereby promptly alerting the user and / or maintenance personnel to take appropriate action and avoid the harm and / or inconvenience caused by engine jamming.
[0073] <<Taking a 25cc single-cylinder four-stroke gasoline motorcycle engine as an example>> When the motorcycle engine 200 is turned off, the crankshaft of the motorcycle engine 200 will stop at the leading edge of the valve spring resistance. At this time, by executing step S210, the controller 110 can drive the integrated starter generator 130 to reverse at a reverse torque value between 3 and 4 Newton-meters within a 0.5-second reverse time, so as to drive the crankshaft of the motorcycle engine 200 to the trailing edge of the valve spring resistance, and push it forward by a small angle value due to the reaction force of the valve spring resistance.
[0074] Subsequently, after step S210 is completed, the integrated starter generator 130 will stop reversing due to the termination of the reversal time. At this time, it will enter a state of stopping operation and waiting to start. By executing step S220, the controller 110 will control the power supply device 120 to output a forward constant current between 60 and 80 amps to the integrated starter generator 130 to drive the integrated starter generator 130 to operate in the forward direction.
[0075] Subsequently, as the integrated starter generator 130 rotates in the forward direction and drives the crankshaft of the motorcycle engine 200 to rotate, if the forward angular velocity of the crankshaft of the motorcycle engine 200 driven by the integrated starter generator 130 is greater than or equal to the expected value of 450 RPM, the motorcycle engine 200 will be started, so that the motorcycle engine 200 will automatically rise to the idle speed of 1,500 RPM due to ignition.
[0076] Furthermore, if the forward angular velocity of the crankshaft of the motorcycle engine 200 driven by the integrated starter generator 130 is less than the expected value of 450 RPM, this indicates that the crankshaft of the motorcycle engine 200 is between two successive valve spring resistances. To resolve this situation, by executing step S510, the controller 110 can again drive the integrated starter generator 130 to reverse operation with a reverse constant torque value between 3 and 4 Newton-meters, so as to drive the crankshaft of the motorcycle engine 200 to a position where a constant torque is maintained at a stop position on the trailing edge of the first valve spring resistance among the two successive valve spring resistances. At this time, the reverse driving force of the integrated starter generator 130 and the exhaust valve spring resistance reach a force balance static state.
[0077] Subsequently, by executing step S520, the controller 110 will immediately control the power supply unit 120 to output a forward constant current between 60 and 80 amps to the integrated starter generator 130 again, so as to immediately drive the integrated starter generator 130 to start forward operation again. Benefiting from the torque generated when the integrated starter generator 130 rotates forward and the reaction force of the exhaust valve spring resistance, the crankshaft of the motorcycle engine 200 will be driven to an angular velocity of greater than or equal to 450 RPM, so that the motorcycle engine 200 will automatically rise to the idle speed of 1,500 RPM due to ignition.
[0078] In some embodiments, the steps of the method for starting a motorcycle engine described in this application may be further combined, replaced, repeated and / or modified to produce new embodiments without departing from the scope disclosed in this application.
[0079] This application has been further described through the above embodiments and accompanying drawings, but those skilled in the art can still make many modifications and variations without departing from the scope and spirit set forth in the claims. Therefore, the scope of protection of this application should still be determined by the claims and should not be limited by the content disclosed in the specification.
Claims
1. A method for starting a motorcycle engine, characterized in that, The method is executed via an engine starting control system, wherein the engine starting control system includes a controller, a power supply coupled to the controller, and an integrated starter generator coupled to both the controller and the power supply, and the integrated starter generator in the engine starting control system is coupled to a motorcycle engine. The method includes the following steps: The controller drives the integrated starter generator to run in reverse at a reverse torque value during the reverse time until the reverse time ends. The reverse torque of the integrated starter generator driven by the reverse torque value is greater than the friction resistance value and less than the maximum resistance value of the valve spring resistance. After the integrated starter generator stops reversing, the controller controls the power supply device to output a forward constant current to the integrated starter generator to drive it to run in the forward direction. The forward torque of the integrated starter generator driven by the current of the forward constant current is greater than the sum of the friction resistance value and the current resistance value of the valve spring resistance. as well as During the forward operation of the integrated starter generator, when the forward angular velocity of the motorcycle engine driven by the integrated starter generator is greater than or equal to the expected value, the motorcycle engine will be started by the integrated starter generator.
2. The method according to claim 1, characterized in that, The method also includes the following steps: During the forward operation of the integrated starter generator, if the forward angular velocity of the motorcycle engine driven by the integrated starter generator is less than the expected value, the controller will drive the integrated starter generator to reverse operation again with the reverse torque value. as well as During the reverse operation of the integrated starter generator, when the reverse driving force of the integrated starter generator and the resistance of the exhaust valve spring reach a force balance and remain stationary, the controller controls the power supply device to output the forward constant current to the integrated starter generator again, so as to drive the integrated starter generator to operate in the forward direction again.
3. The method according to claim 1, characterized in that, The method also includes the following steps: The controller receives the rotation angle value of the integrated starter generator. When the integrated starter generator stops reversing at the end of the reversal time, the controller determines whether the rotation angle value of the integrated starter generator is greater than the preset value of the engine wear angle. as well as When the rotation angle of the integrated starter generator is greater than the preset value of the engine wear angle, the controller determines that the motorcycle engine is in an engine wear state.
4. The method according to claim 1, characterized in that, The method also includes the following steps: The controller receives the rotation angle value of the integrated starter generator. When the integrated starter generator is running in the forward direction, the controller determines whether the rotation angle of the integrated starter generator is less than the preset value of the engine jam angle within the determination time. as well as When the rotation angle of the integrated starter generator is less than the preset value of the engine jam angle within the judgment time, the controller determines that the motorcycle engine is in an engine jam state.
5. The method according to claim 1, characterized in that, The engine start control system does not include a crankshaft positioning sensor.
6. A system for starting a motorcycle engine, characterized in that, The system is coupled to a motorcycle engine, and the system includes: Controller; Power supply device, coupled to the controller; and An integrated starter generator is coupled to the controller, the power supply device, and the motorcycle engine, respectively. The system is configured to perform a method for starting a motorcycle engine according to any one of claims 1 to 4, so as to start the motorcycle engine.
7. The system according to claim 6, characterized in that, The system does not include a crankshaft positioning sensor.