Range-extending starting method, electronic equipment, medium and program product
By obtaining the engine coolant temperature in a low-temperature environment to determine the target torque, the generator is controlled to drive the engine. When the generator speed reaches a preset threshold, the engine is controlled to inject fuel and ignite, which solves the problem of difficult vehicle starting at low temperatures and achieves stable starting and efficient utilization of fuel and electricity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-10
- Publication Date
- 2026-03-24
AI Technical Summary
Vehicles may have difficulty starting under extreme conditions such as low temperatures, especially due to unstable engine combustion and reduced battery discharge capacity, leading to starting failure.
By acquiring the engine's current coolant temperature, a target torque inversely proportional to the generator is determined to drive the engine. When the generator speed reaches a preset threshold, the engine is controlled to inject fuel and ignite. By combining closed-loop control of torque and speed, stable engine startup is ensured.
It improves the engine's starting success rate in low-temperature environments, reduces fuel and electrical energy waste, and enhances the smoothness of the starting process and the overall vehicle comfort.
Smart Images
Figure CN121719655A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of automobiles, in particular to a range extending starting method, an electronic device, a medium and a program product. BACKGROUND
[0002] With the promotion of environmental protection requirements and energy structure transformation, the range extending hybrid electric vehicle occupies an important position in the field of new energy vehicles due to the advantages of endurance and environmental protection. It realizes high efficiency operation through engine power generation, battery and motor cooperative driving of vehicle.
[0003] In actual application, when the engine water temperature is low, due to poor fuel atomization in the engine, the quality of the mixed gas is poor, which leads to unstable combustion process, and the engine is difficult to quickly enter the high efficiency working state, thereby significantly reducing the power generation efficiency. At the same time, the low temperature environment also slows down the ion migration rate of the battery electrolyte and reduces the activity of the electrode material, resulting in a significant increase in the internal resistance of the battery and a sharp decline in the discharge capacity. The above two factors are coupled with each other and deteriorate each other, which aggravates the starting difficulty of the vehicle in extreme working conditions such as low temperature. SUMMARY
[0004] The purpose of the embodiments of the present application is to provide a range extending starting method, an electronic device, a medium and a program product to solve the problem of starting difficulty of the vehicle in extreme working conditions such as low temperature existing in related technologies.
[0005] The embodiments of the present application provide a range extending starting method, comprising: In the case that the vehicle is in an extreme working condition, the current water temperature of the engine is obtained; the extreme working condition includes at least one of the water temperature of the engine being lower than a preset temperature threshold, the allowable discharge power of the vehicle power battery being lower than a preset power threshold, and the number of starting failures reaching a preset number threshold when starting in a conventional starting mode; determining a first target torque according to the current water temperature, the first target torque being inversely proportional to the current water temperature of the engine; controlling the generator to operate according to the first target torque, so as to drag the engine; In the case that the rotating speed of the generator reaches a first preset threshold, the engine is controlled to inject oil and ignite, so as to realize the starting of the engine.
[0006] In the above implementation manner, in the case that the vehicle is in an extreme working condition, the current water temperature of the engine is obtained, and a first target torque is determined according to the current water temperature of the engine. Since the first target torque is inversely proportional to the current water temperature of the engine, in other words, the lower the current water temperature of the engine, the higher the determined first target torque. In this way, even if the vehicle is in a low temperature environment, the generator can also drag the engine with a higher torque, thereby improving the starting success rate of the engine.
[0007] In addition, since the engine and the generator have a certain transmission ratio relationship, when the rotational speed of the generator reaches the first preset threshold, the rotational speed of the engine also synchronously reaches a certain rotational speed. At this time, the engine internal intake flow rate is improved, the in-cylinder air disturbance is enhanced, which is helpful for full fuel atomization and mixing. At the same time, the piston movement speed is accelerated, and the temperature generated in the compression stroke is higher, which creates favorable conditions for reliable ignition. Controlling the engine fuel injection ignition at this time can not only significantly improve the first combustion success rate, but also avoid invalid fuel injection, misfire or repeated start caused by premature ignition, thereby reducing the waste of fuel and electric energy.
[0008] In addition, the engine speed will have an uncontrollable speed overshoot during the start of the traditional engine, especially when starting at low temperature, the engine speed overshoot is particularly obvious. The engine speed can be controlled in a closed loop by controlling the generator to operate according to the first target torque, so that the engine speed is controllable during the start process.
[0009] Optionally, before controlling the generator to operate according to the first target torque, the method further comprises: sending an instruction of torque being 0 to the engine controller.
[0010] In the above implementation manner, by sending an instruction of torque being 0 to the engine controller, the engine controller can be provided with an explicit power request. In this way, the engine controller can be effectively prevented from entering an unintended operation mode due to communication interruption, invalid signal or missing instruction, thereby improving the control robustness.
[0011] Optionally, the range extending start method further comprises: obtaining a second target torque; controlling the engine to operate according to the second target torque when the rotational speed of the generator reaches the first preset threshold; the second target torque is greater than a torque threshold of the engine idle speed control.
[0012] In the above implementation manner, since the second target torque is greater than the torque threshold of the engine idle speed control, when the rotational speed of the generator reaches the first preset threshold, the engine is controlled to operate according to the second target torque, so that the engine does not enter the idle state, thereby enabling the engine speed to continue to climb.
[0013] Optionally, the range extending start method further comprises: controlling the engine to operate according to a preset expected torque and controlling the generator to operate according to a preset expected generator rotational speed when the rotational speed of the generator reaches a second preset threshold; wherein the second preset threshold is greater than the first preset threshold.
[0014] In the above implementation, in the case that the rotating speed of the generator reaches the second threshold value, the engine is controlled to operate according to the preset expected torque, and the generator is controlled to operate according to the preset expected rotating speed of the generator. That is, the engine is controlled to operate in the torque control mode, and the generator is controlled to operate in the rotating speed mode, so that the engine and the generator are both in the stable operating stage, thereby supplying power to the vehicle power battery.
[0015] In addition, when the engine is controlled to operate according to the preset expected torque, the rotating speed of the engine continuously rises, and in this process, the generator is controlled according to the preset expected rotating speed of the generator, so that the generator can automatically adjust the electromagnetic load torque to maintain the target rotating speed, thereby exerting a controllable reverse load on the engine. The load can effectively offset the rotating speed upsurge caused by sudden combustion establishment, mechanical inertia or torque fluctuation, actively suppress the dynamic process of the rotating speed of the engine, and significantly improve the operating smoothness and vehicle comfort in the starting and transition stages.
[0016] Optionally, before the generator is controlled to operate according to the first target torque, the method further comprises: controlling the generator to enter a 0-torque state.
[0017] In the above implementation, by switching the generator to the zero-torque output state before the generator is controlled to operate according to the first target torque, historical control disturbances can be cleared and a determined initial condition can be established, thereby ensuring that the dynamic response of the torque of the generator is accurate and smooth.
[0018] Optionally, the step of controlling the generator to enter a 0-torque state comprises: sending a torque control mode instruction to a generator controller to switch the generator control mode to a torque control mode; sending a torque of 0 instruction to the generator controller to control the generator controller to control the generator to enter a 0-torque state.
[0019] In the above implementation, by sending a torque control mode instruction to the generator controller and setting the target torque to 0, the generator controller is enabled to drive the generator to enter a zero-torque output state, so that the generator can reliably exit the previous working mode in a controlled manner, and a determined initial condition is established for high-precision torque output in the subsequent starting stage.
[0020] In a second aspect, the present application provides an electronic device, comprising a processor, a memory and a communication bus; the communication bus is used to realize the connection communication between the processor and the memory; the processor is used to execute one or more programs stored in the memory to realize the range extending starting method of any one of the above.
[0021] Thirdly, this application also provides a computer-readable storage medium storing one or more programs that can be executed by one or more processors to implement any of the above-described extended-range startup methods.
[0022] Fourthly, embodiments of this application also provide a computer program product, the computer program product including a computer program, which, when executed by a processor, implements any of the above-described extended-range startup methods. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 A schematic flowchart illustrating a range-extended startup method provided in an embodiment of this application; Figure 2 A flowchart illustrating another range-extended startup method provided in this application embodiment; Figure 3 A flowchart illustrating another range-extended startup method provided in this application embodiment; Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation
[0025] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.
[0026] Example 1: To address the problem of vehicle starting difficulties under extreme conditions such as low temperatures, this application provides a range-extended starting method. See also... Figure 1 As shown, Figure 1 This is a flowchart illustrating the range-extended startup method provided in the embodiments of this application, including: Step S101: Under extreme operating conditions, obtain the current engine coolant temperature; In some embodiments, extreme operating conditions may include at least one of the following: engine coolant temperature is lower than a preset temperature threshold, vehicle power battery allowable discharge power is lower than a preset power threshold, and the number of start-up failures reaches a preset number threshold when starting using a conventional start-up method.
[0027] The preset temperature threshold can be -40 degrees Celsius. The preset power threshold can be 5 kilowatts. The preset number threshold can be two. The regular starting mode is characterized by using only the generator to drag the engine until the rotation speed of the engine reaches a preset rotation speed threshold, so as to realize the starting of the engine, the starting of the engine being characterized by the process of dragging the engine from static to stable operation. In other words, the starting process of the engine corresponds to the process of the rotation speed of the engine rising to stable operation.
[0028] In step S102, a first target torque is determined according to the current water temperature, the first target torque being inversely proportional to the current water temperature of the engine.
[0029] In an embodiment, the current water temperature can be matched in a preset temperature and alternative torque correspondence relationship, and the alternative torque corresponding to the current water temperature is the first target torque. The lower the current water temperature of the engine, the greater the first target torque.
[0030] For example, a one-dimensional curve can be configured with the engine water temperature as the horizontal axis, and the principle of the lower the engine water temperature, the greater the alternative torque. In this way, the current water temperature can be matched in the one-dimensional curve to obtain the alternative torque corresponding to the current water temperature, that is, the first target torque.
[0031] The first target torque ranges from 15 Nm to 70 Nm.
[0032] In step S103, the generator is controlled to operate according to the first target torque, so as to drag the engine.
[0033] In the embodiments of the present application, the first target torque is greater than the reverse drag resistance of the engine at the current water temperature. In this way, the generator can reliably drag the engine to rotate against the reverse drag resistance.
[0034] The reverse drag resistance of the engine represents the passive resistance torque existing in the engine when the engine is rotated by the generator without ignition.
[0035] The reverse drag resistance is significantly affected by the current water temperature of the engine: the lower the water temperature, the higher the viscosity of the oil, resulting in greater reverse drag resistance; on the contrary, the higher the water temperature, the smaller the reverse drag resistance. Correspondingly, in the embodiments of the present application, the first target torque is inversely proportional to the current water temperature of the engine.
[0036] In step S104, the engine is controlled to inject and ignite when the rotation speed of the generator reaches a first preset threshold, so as to realize the starting of the engine.
[0037] The range extending starting method provided in the embodiments of the present application can be used in the case that the vehicle is in an extreme working condition. The current water temperature of the engine is obtained, and the first target torque is determined according to the current water temperature of the engine. Since the first target torque is inversely proportional to the current water temperature of the engine, in other words, the lower the current water temperature of the engine, the higher the determined first target torque. In this way, even if the vehicle is in a low-temperature environment, the generator can drag the engine at a higher torque, thereby improving the starting success rate of the engine.
[0038] In addition, since the rotational speeds of the engine and the generator have a certain transmission ratio relationship, when the rotational speed of the generator reaches the first preset threshold, the rotational speed of the engine also synchronously reaches a certain rotational speed. At this time, the intake flow rate in the engine is improved, the in-cylinder air disturbance is enhanced, which is helpful for full fuel atomization and mixing. At the same time, the piston movement speed is accelerated, and the temperature generated in the compression stroke is higher, which creates favorable conditions for reliable ignition.
[0039] In combination with Figure 2 Before step S103, step S131 of sending an instruction of 0 torque to the engine controller can also be performed. In this way, the engine controller can be provided with a clear power request. Therefore, the engine controller can be effectively prevented from entering an unexpected running mode due to communication interruption, invalid signal or missing instruction, and the control robustness is improved.
[0040] When the instruction of 0 torque is sent to the engine controller, an oil injection instruction can also be sent to the engine controller, so that the engine controller controls the engine to inject oil and ignite when the rotational speed of the generator reaches the first preset threshold, and the starting of the engine is realized.
[0041] In an embodiment, the instruction of 0 torque can be sent to the engine controller first, and then the oil injection instruction can be sent to the engine controller. Alternatively, the oil injection instruction can be sent to the engine controller first, and then the instruction of 0 torque can be sent to the engine controller.
[0042] In combination with Figure 3 As shown in the figure, step S131 can further include controlling the generator to enter a 0-torque state. In this way, before the generator is controlled to run according to the first target torque, the generator is switched to a 0-torque output state first. In this way, historical control disturbances can be cleared and a certain initial condition can be established, so that the dynamic response of the generator torque is accurate and smooth.
[0043] In the embodiment, a torque control mode instruction can be sent to the generator controller to switch the control mode of the generator to a torque control mode. At the same time, an instruction of 0 torque can be sent to the generator controller, so that the generator controller controls the generator to enter a 0-torque state.
[0044] In an optional implementation of the embodiment of the application, the second target torque can be acquired before step S104, and correspondingly, when step S104 is performed, that is, when the rotating speed of the generator reaches the second preset threshold, the engine is controlled to operate according to the second target torque in addition to the fuel injection ignition. The second target torque is greater than the torque threshold of the idle speed control of the engine. In this way, the rotating speed of the engine can continue to rise.
[0045] For example, the second target torque can be sent to the engine controller, so that the engine controller controls the engine to operate according to the second target torque. In this way, the engine controller can be prevented from performing idle speed control during the rising of the rotating speed of the engine, and the situation that the generator and the engine controller simultaneously control the rotating speed of the engine can be prevented.
[0046] In another optional implementation of the embodiment of the application, the engine can be controlled to operate according to the second target torque after step S104. In this way, even if the engine temporarily enters the idle speed operation mode due to insufficient instantaneous load or control delay, the rotating speed and output power of the engine can be raised again by applying the second target torque, so that the engine quickly leaves the idle speed state and enters the working interval of stable work and efficient power generation of the generator.
[0047] Embodiment Two: This embodiment is further illustrated based on the embodiment one, taking the vehicle controller as an example of the execution subject of the extended range starting method, and the vehicle controller, the generator controller and the engine controller are electrically connected.
[0048] The vehicle controller can determine whether the vehicle is in an extreme working condition.
[0049] The vehicle controller can acquire the current water temperature of the engine, the allowed discharge power of the vehicle power battery and the number of consecutive starting failures when the vehicle is started by using a conventional starting method.
[0050] The water temperature of the engine represents the temperature of the coolant in the engine.
[0051] The vehicle controller can compare the current water temperature of the engine with a preset temperature threshold, compare the allowed discharge power of the vehicle power battery with a preset power threshold, and compare the number of starting failures with a preset number threshold.
[0052] In a case where the water temperature of the engine is lower than a preset temperature threshold, the allowable discharge power of the vehicle power battery is lower than a preset power threshold, and / or the number of start failures reaches a preset number threshold, the vehicle controller can send an extreme working condition start instruction to the engine controller, so that the engine controller enters a preparation stage. The vehicle controller can also send a torque control mode instruction and a torque of 0 instruction to the generator controller, so that the generator controller controls the generator to enter a 0 torque state.
[0053] The vehicle controller can send an oil injection instruction and a torque of 0 instruction to the engine controller, and in a case where the speed of the generator reaches a first preset threshold, control the engine to inject oil and ignite, so as to start the engine.
[0054] The vehicle controller can send a first target torque determined according to the current water temperature of the engine to the generator controller, so that the generator controller controls the generator to operate according to the first target torque, thereby dragging the engine. Correspondingly, the speeds of the generator and the engine will both increase.
[0055] And in a case where the speed of the generator reaches a first preset threshold, the vehicle controller can send a second target torque to the engine controller, and at the same time, the engine controller can control the engine to inject oil and ignite in response to the oil injection instruction, and control the engine to operate according to the second target torque, so that the speed of the engine continues to increase, thereby starting the engine. Similarly, in this process, the speeds of the generator and the engine both maintain an increasing trend.
[0056] The first preset threshold is obtained by converting the speed of the engine through a transmission speed ratio.
[0057] In detail, the first preset threshold, the speed of the engine and the transmission speed ratio satisfy the following formula: Generator speed = Engine speed × Transmission speed ratio.
[0058] The speed of the engine can be in a range of 50 rpm to 300 rpm, and correspondingly, the first preset threshold can be in a range of 50 rpm × transmission speed ratio to 300 rpm × transmission speed ratio.
[0059] When the speed of the engine is in a range of 50 rpm to 300 rpm, the intake flow rate inside the engine is significantly improved, and the in-cylinder air disturbance is enhanced, which is beneficial to the full atomization and uniform mixing of fuel, thereby creating favorable conditions for reliable ignition.
[0060] However, since the engine has not yet burned and done work at the initial start-up stage, the engine speed fluctuates greatly and the measurement noise is high; in contrast, the generator is driven by the generator controller, and the speed signal is more stable and more accurate. Therefore, the embodiments of the present application select the speed of the generator as the control reference, and when the speed of the generator reaches a first preset threshold, the injection and ignition operation of the engine is triggered to improve the reliability and robustness of the ignition timing judgment.
[0061] When the speed of the generator reaches a second preset threshold, the vehicle control unit can send a preset expected torque to the engine controller to control the engine to operate according to the preset expected torque. The vehicle control unit can also send a preset expected generator speed to the generator controller to control the generator to operate according to the preset expected generator speed.
[0062] Similarly, the second preset threshold is obtained by converting the successful start-up speed of the engine through the transmission speed ratio.
[0063] In detail, the second preset threshold, the successful start-up speed of the engine and the transmission speed ratio satisfy the formula: second preset threshold = successful start-up speed of the engine x transmission speed ratio.
[0064] The successful start-up speed of the engine can be in the range of 800 rpm to 1100 rpm, and correspondingly, the value range of the second preset threshold can be 800 rpm x transmission speed ratio to 1100 rpm x transmission speed ratio.
[0065] When the speed of the engine is in the range of 800 rpm to 1100 rpm, it can be determined that the engine can operate stably, in other words, the engine has completed the start-up and has the ability to output continuous mechanical power.
[0066] However, at the initial start-up stage of the engine, since the engine has not yet established stable combustion, the speed signal of the engine is easily affected by factors such as compression stroke reverse drag, misfire, etc., and fluctuates greatly and the measurement noise is high; in contrast, the generator is closed-loop driven by the generator controller, and the speed feedback signal of the generator has higher stability and accuracy.
[0067] Therefore, the embodiments of the present application select the speed of the generator as the control judgment reference: when the speed of the generator reaches the second preset threshold, the vehicle control unit synchronously triggers the torque control of the engine and the speed control of the generator, so that smooth and reliable transition from the start-up stage to the power generation stage can be realized.
[0068] The preset expected torque is calculated according to the preset expected power of the engine and the preset expected engine speed. In detail, the preset expected torque can be obtained by calculating T = 9550 x P / n, where P represents the preset expected power and n represents the preset expected engine speed.
[0069] The preset expected generator speed is calculated according to the preset expected engine speed and the transmission speed ratio. In detail, the preset expected generator speed can be calculated by: preset expected generator speed = preset expected engine speed x transmission speed ratio.
[0070] The preset expected engine speed can be in a range of 1100 rpm to 3000 rpm. Correspondingly, the preset expected generator speed can be in a range of 1100 rpm x transmission speed ratio to 3000 rpm x transmission speed ratio.
[0071] When the engine is controlled according to the preset expected torque, the engine speed will continue to rise. In this process, the generator is controlled according to the preset expected generator speed, so that the generator can automatically adjust the electromagnetic load torque to maintain the preset expected generator speed, thereby exerting a controllable reverse load on the engine. This load can effectively offset the engine speed overshoot caused by sudden combustion establishment, mechanical inertia or torque fluctuation, actively suppress the dynamic process of the engine speed, and significantly improve the operation smoothness and vehicle comfort during the starting and transition stages.
[0072] The preset expected power of the engine represents the required output power of the engine during the generating stage.
[0073] Finally, when the speed of the generator reaches the preset expected engine speed and / or the torque of the engine reaches the preset expected torque, the vehicle controller can determine that the engine starting is successful, at this time, the vehicle controller can send a prohibition instruction to the engine controller to terminate the extreme condition starting instruction. In some embodiments, the vehicle controller can set the extreme condition starting instruction to false, thereby terminating the starting process and preventing the engine controller from repeatedly starting.
[0074] In the above implementation manner, by obtaining the current water temperature of the engine when the vehicle is in the extreme condition, and determining the first target torque according to the current water temperature of the engine, since the first target torque is inversely proportional to the current water temperature of the engine, in other words, the lower the current water temperature of the engine, the higher the determined first target torque. In this way, even if the vehicle is in a low temperature environment, the generator can drag the engine with a higher torque, thereby improving the success rate of engine starting.
[0075] In addition, since the engine and the generator have a certain transmission ratio relationship, when the rotational speed of the generator reaches the first preset threshold, the rotational speed of the engine also synchronously reaches a certain rotational speed, at this time, the engine internal intake flow rate is improved, the in-cylinder air disturbance is enhanced, which is helpful for fuel full atomization and mixing; at the same time, the piston movement speed is accelerated, and the temperature generated in the compression stroke is higher, which creates favorable conditions for reliable ignition. Controlling the engine fuel injection ignition at this time can not only significantly improve the combustion success rate, but also avoid invalid fuel injection, misfire or repeated start caused by premature ignition, thereby reducing the waste of fuel and electric energy.
[0076] Embodiment three: Based on the same inventive concept, the embodiment provides an electronic device, as shown in the figure, which comprises a processor 401 and a memory 402. Wherein: Figure 4 The processor 401 is used to execute one or more programs stored in the memory 402 to realize the above-mentioned extended start method. The processor 401 is used to execute one or more programs stored in the memory 402 to realize the above-mentioned extended start method.
[0077] It can be understood that the processor 401 can be a processor core or a processor chip, or other circuitry that can be programmed and run. And the memory 402 can be RAM (Random Access Memory, Random Access Memory), ROM (Read-Only Memory, Read-Only Memory), flash memory, etc., but not as a limitation.
[0078] It can also be understood that Figure 4 The structure shown in the figure is only schematic, and the electronic device can also include more or less components than those shown in the figure, or have a different configuration from that shown in the figure. For example, it can also have an internal communication bus for realizing communication between the processor 401 and the memory 402; for another example, it can also have an external communication interface, such as a USB (Universal Serial Bus, Universal Serial Bus) interface, a CAN (Controller Area Network, Controller Area Network) bus interface, etc.; for another example, it can also have a display screen and other information display components, but not as a limitation. Figure 4 Figure 4 In this embodiment, the electronic device can be a vehicle controller. The vehicle controller can be installed in the vehicle. The electronic device can also be a vehicle.
[0079]
[0080] Based on the same inventive concept, the embodiment further provides a computer readable storage medium, such as a floppy disk, an optical disk, a hard disk, a flash memory, a U disk, an SD (Secure Digital Memory Card) card, an MMC (Multimedia Card) card, etc., in which one or more programs for implementing the above steps are stored, and the one or more programs can be executed by one or more processors to implement the above range extending starting method. Details are not described herein.
[0081] Based on the same inventive concept, the embodiment further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the above range extending starting method.
[0082] For example, the computer program product can be an installation package or a program package.
[0083] In the embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or other forms.
[0084] In addition, the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment.
[0085] Further, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.
[0086] In this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.
[0087] The above merely provides an example of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A range-extended start-up method, characterized in that, include: Obtain the engine's current coolant temperature when the vehicle is under extreme operating conditions; The extreme operating conditions include at least one of the following: the engine coolant temperature is lower than a preset temperature threshold, the allowable discharge power of the vehicle's power battery is lower than a preset power threshold, and the number of start-up failures reaches a preset number threshold when starting using a conventional start-up method. A first target torque is determined based on the current water temperature, and the first target torque is inversely proportional to the current water temperature of the engine; The generator is controlled to operate according to the first target torque, thereby driving the engine; When the generator speed reaches a first preset threshold, the engine is controlled to inject fuel and ignite, thereby starting the engine.
2. The method according to claim 1, characterized in that, Before controlling the generator to operate according to the first target torque, the method further includes: Send a command to the engine controller that the torque is 0.
3. The method according to claim 1, characterized in that, Also includes: Obtain the second target torque; When the generator speed reaches the first preset threshold, the engine is controlled to operate according to the second target torque; The second target torque is greater than the torque threshold of the engine idle speed control.
4. The method according to claim 1, characterized in that, Also includes: When the generator speed reaches the second preset threshold, the engine is controlled to operate according to the preset desired torque, and the generator is controlled to operate according to the preset desired generator speed. Wherein, the second preset threshold is greater than the first preset threshold.
5. The method according to claim 1, characterized in that, Before controlling the generator to operate according to the first target torque, the method further includes: Control the generator to enter a zero torque state.
6. The method according to any one of claims 1 to 5, characterized in that, Controlling the generator to enter a zero-torque state includes: Send a torque control mode command to the generator controller to switch the generator control mode to torque control mode; A command to reduce torque to 0 is sent to the generator controller, causing the generator controller to control the generator to enter a 0 torque state.
7. An electronic device, characterized in that, It includes a processor and a memory, the memory storing computer-executable instructions that can be executed by the processor, the processor executing the computer-executable instructions to implement the extended-range startup method according to any one of claims 1 to 6.
8. A computer storage medium, characterized in that, The storage medium stores computer-executable instructions, which, when invoked and executed by a processor, cause the processor to implement the extended-range startup method according to any one of claims 1 to 6.
9. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the extended-range startup method according to any one of claims 1 to 6.