Engine starting control method, system and electronic device of p2 architecture hybrid vehicle

Abstract

The application provides an engine starting control method and system of a P2 architecture hybrid vehicle and an electronic device, relates to the engine starting technical field of the P2 architecture hybrid vehicle, and the engine starting control method of the P2 architecture hybrid vehicle comprises the following steps: when the vehicle has an engine starting demand: determining whether the vehicle has a gear shifting trend according to the vehicle working condition; determining whether the vehicle meets preset conditions of engine starting by motor reverse dragging according to the vehicle working condition; if the vehicle has the gear shifting trend and the vehicle meets the preset conditions of engine starting by motor reverse dragging, the engine starting instruction is inhibited from being sent until the vehicle is gear shifted, and when the transmission is empty, the engine starting instruction is sent to enable the motor to reverse drag and start the engine. The number of times of starting the engine by the motor reverse dragging can be greatly improved, so that the number of times of using the starter is reduced, the service life of the starter can be greatly prolonged, and the use cost of the vehicle is reduced.

Description

Technical Field

[0001] This invention relates to the field of engine starting technology for P2 architecture hybrid vehicles, specifically to an engine starting control method, system, and electronic equipment for P2 architecture hybrid vehicles. Background Technology

[0002] The P2 architecture, or coaxial parallel system, places the engine and motor on the same shaft, with the clutch located between them. In existing technologies, the engine starting methods for P2 architecture hybrid vehicles with a starter motor include starter motor starting, motor-assisted starting, and vehicle-assisted starting. Motor-assisted starting refers to the motor driving the engine as a power source, while vehicle-assisted starting utilizes the vehicle's inertia to start the engine by inverting and injecting fuel. In most vehicle operating conditions, the starter motor is used to start the engine; however, due to the limited lifespan of the starter motor, frequent start-stop cycles significantly reduce its lifespan and increase vehicle operating costs. Motor-assisted starting requires the transmission to be in neutral, a demanding condition that is difficult to achieve. Furthermore, vehicle-assisted starting suffers from poor comfort due to the pneumatic clutch and the precision of motor torque compensation control. Summary of the Invention

[0003] This application provides an engine start-up control method for a P2 architecture hybrid vehicle to at least solve one technical problem existing in the related art.

[0004] According to one aspect of the embodiments of this application, an engine start-up control method for a P2 architecture hybrid vehicle is provided, including: when the vehicle has a start-up requirement:

[0005] Determine if the vehicle is shifting gears based on its operating condition;

[0006] Determine whether the vehicle meets the preset conditions for motor reverse start-up based on the vehicle's operating condition;

[0007] If the vehicle tends to shift gears and the vehicle meets the preset conditions for motor reverse-dragging start-up, the start-up command is suppressed until the vehicle shifts gears and the transmission is disengaged. Then, the start-up command is issued to start the motor in reverse-dragging the engine.

[0008] As an optional implementation, determining whether the vehicle has a shifting tendency based on the vehicle's operating conditions includes: determining whether the vehicle's acceleration is positive.

[0009] As an optional implementation, the preset conditions for the motor to start in reverse include: the vehicle's high-voltage system is normal, the motor is enabled normally, and the remaining power battery charge reaches the preset charge level.

[0010] As an optional implementation, it also includes: if the vehicle does not show a shifting tendency, and / or the vehicle does not meet the preset conditions for motor reverse starting, controlling the start command to be issued directly.

[0011] As an optional implementation, after the start command is directly issued, the method further includes: obtaining the current vehicle speed; and determining the engine start method based on the current vehicle speed.

[0012] As an optional implementation, determining the engine starting method based on the current vehicle speed includes: determining whether the current vehicle speed is greater than a preset vehicle speed value; if the current vehicle speed is greater than the preset vehicle speed value, controlling the vehicle to reverse and start the engine.

[0013] As an optional implementation, determining the engine starting method based on the current vehicle speed includes: determining whether the current vehicle speed is greater than a preset vehicle speed value; if the current vehicle speed is less than or equal to the preset vehicle speed value, controlling the starter motor to start the engine.

[0014] According to another aspect of the embodiments of this application, an engine start control system for a P2 architecture hybrid vehicle is provided, including: a shift trend acquisition module, used to determine whether the vehicle has a shift trend based on the vehicle's operating conditions when the vehicle has a start-up requirement; a preset condition judgment module, used to determine whether the vehicle meets the preset conditions for motor reverse-draft start-up based on the vehicle's operating conditions; and an engine start control module, used to suppress the issuance of a start-up command when the vehicle has a shift trend and the vehicle meets the preset conditions for motor reverse-draft start-up, until the vehicle shifts gears and the transmission is disengaged, and then control the issuance of the start-up command to start the motor in reverse-draft mode.

[0015] According to another aspect of the embodiments of this application, an electronic device is provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus, the memory is used to store a computer program, and the processor is used to execute the engine start control method steps of the P2 architecture hybrid vehicle by running the computer program stored in the memory.

[0016] According to another aspect of the embodiments of this application, a computer-readable storage medium is provided, the storage medium storing a computer program, wherein the computer program is configured to execute the engine start control method steps of the P2 architecture hybrid vehicle when it is run.

[0017] This application provides an engine start-up control method for a P2 architecture hybrid vehicle. When the vehicle needs to start, the method determines whether the vehicle is shifting gears based on its operating conditions; it also determines whether the vehicle meets the preset conditions for motor-assisted starting; if the vehicle is shifting gears and meets the preset conditions for motor-assisted starting, the start-up command is suppressed until the vehicle shifts gears and the transmission is disengaged, at which point the start-up command is issued to start the engine using motor-assisted starting. This control method can significantly reduce the number of times the engine is started using motor-assisted starting, thus reducing the number of times the starter motor is used and significantly extending the starter motor's lifespan, thereby reducing the vehicle's operating costs. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of an optional P2 architecture hybrid vehicle engine start-up control method according to an embodiment of this application. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] like Figure 1 As shown, this application embodiment provides an engine start-up control method for a P2 architecture hybrid vehicle, including: when the vehicle has a start-up requirement:

[0024] S1 determines whether the vehicle has a shifting tendency based on the vehicle's operating conditions;

[0025] S2 determines whether the vehicle meets the preset conditions for motor reverse towing start based on the vehicle's operating conditions;

[0026] If the vehicle tends to shift gears and meets the preset conditions for motor reverse-dragging start-up, the start-up command is suppressed until the vehicle shifts gears and the transmission is disengaged. Then, the start-up command is issued to start the motor in reverse-dragging the engine.

[0027] Specifically, when the vehicle requires engine start-up, such as during high-power driving, hill climbing, or acceleration, the engine needs to start to provide additional power and ensure vehicle performance. In low-temperature environments, the engine may need to start for warm-up, improving lubricant flow and protecting internal engine components. Alternatively, when the vehicle's air conditioning system or other engine-powered auxiliary equipment starts, especially in electric mode, the engine may need to start to power mechanical accessories. In this case, it's necessary to determine if the vehicle is shifting gears. If so, the transmission will disengage shortly. At this disengagement moment, the motor decouples from the vehicle's wheels, enabling reverse-drive engine start-up. Therefore, when the vehicle requires start-up and a shifting tendency is detected, the start-up command can be suppressed, waiting for the vehicle to shift gears. Once the transmission disengages, the start-up command is sent to achieve reverse-drive engine start-up. The start-up command refers to the instruction signal used to control engine start-up.

[0028] Furthermore, in order to enable the motor to start the engine while towing it backwards, the vehicle needs to meet preset conditions for motor towing. These preset conditions are the minimum requirements for the motor to start the engine while towing it backwards, and this application does not further limit them; they can be selected according to the actual situation.

[0029] This control method can greatly increase the number of times the engine can be started by reversing with a motor, thus reducing the number of times the starter motor is used, which can greatly extend the service life of the starter motor and thus reduce the vehicle's operating costs.

[0030] Furthermore, it should be noted that a preset suppression time can be set. That is, if the vehicle has a tendency to shift gears and the vehicle meets the preset conditions for motor reverse starting, after the suppression start command is issued, if the transmission does not shift gears within the preset time, the start command will be issued directly without waiting for the shifting moment. However, this application does not limit the preset suppression time, which can be determined according to the vehicle selection and operating conditions.

[0031] As an optional implementation, determining whether the vehicle has a shifting tendency based on the vehicle's operating conditions includes: determining whether the vehicle's acceleration is positive.

[0032] Specifically, whether the vehicle is accelerating can be used as a condition to characterize whether the vehicle has an acceleration shifting tendency. If the vehicle is accelerating, i.e. whether there is a shifting tendency, the start command is suppressed until the transmission shifts into neutral. At this time, the engine is started by using the electric motor to reverse pull.

[0033] As an optional implementation, the preset conditions for the motor to start in reverse include: the vehicle's high-voltage system is normal, the motor is enabled normally, and the remaining power battery charge reaches the preset charge level.

[0034] Specifically, when the vehicle's high-voltage system is normal, the motor is functioning normally, and the remaining charge of the power battery reaches the preset level, the motor can reverse-drive the engine to start when the vehicle is disconnected from the power supply. This ensures stable engine starting and improves the driving experience.

[0035] As an optional implementation, it also includes: if the vehicle does not show a shifting tendency, and / or the vehicle does not meet the preset conditions for motor reverse starting, controlling the start command to be issued directly.

[0036] As an optional implementation, after the start command is directly issued, the method further includes: obtaining the current vehicle speed; and determining the engine start method based on the current vehicle speed.

[0037] As an optional implementation, determining the engine starting method based on the current vehicle speed includes: determining whether the current vehicle speed is greater than a preset vehicle speed value; if the current vehicle speed is greater than the preset vehicle speed value, controlling the vehicle to reverse and start the engine.

[0038] As an optional implementation, determining the engine starting method based on the current vehicle speed includes: determining whether the current vehicle speed is greater than a preset vehicle speed value; if the current vehicle speed is less than or equal to the preset vehicle speed value, controlling the starter motor to start the engine.

[0039] According to another aspect of the embodiments of this application, an engine start control system for a P2 architecture hybrid vehicle is provided, including: a shift trend acquisition module, used to determine whether the vehicle has a shift trend based on the vehicle's operating conditions when the vehicle has a start-up requirement; a preset condition judgment module, used to determine whether the vehicle meets the preset conditions for motor reverse-draft start-up based on the vehicle's operating conditions; and an engine start control module, used to suppress the issuance of a start-up command when the vehicle has a shift trend and the vehicle meets the preset conditions for motor reverse-draft start-up, until the vehicle shifts gears and the transmission is disengaged, and then control the issuance of the start-up command to start the motor in reverse-draft mode.

[0040] According to another aspect of the embodiments of this application, an electronic device is provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus, the memory is used to store a computer program, and the processor is used to execute the engine start control method steps of the P2 architecture hybrid vehicle by running the computer program stored in the memory.

[0041] According to another aspect of the embodiments of this application, a computer-readable storage medium is provided, the storage medium storing a computer program, wherein the computer program is configured to execute the engine start control method steps of the P2 architecture hybrid vehicle when it is run.

[0042] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0043] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more electronic devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0044] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0045] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0046] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the solution provided in this embodiment, depending on actual needs.

[0047] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0048] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0049] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An engine start control method for a P2 hybrid vehicle, characterized by, include: When the vehicle needs to be started: Determine if the vehicle is shifting gears based on its operating condition; Determine whether the vehicle meets the preset conditions for motor reverse start-up based on the vehicle's operating condition; If the vehicle tends to shift gears and the vehicle meets the preset conditions for motor reverse-dragging start-up, the start-up command is suppressed until the vehicle shifts gears and the transmission is disengaged. Then, the start-up command is controlled to be issued to start the motor in reverse-dragging the engine. If the vehicle does not show a tendency to shift gears, and / or the vehicle does not meet the preset conditions for motor reverse start-up, the start-up command is issued directly. After the start command is directly issued, the system further includes: Get the current vehicle speed; The engine start method is determined based on the current vehicle speed.

2. The engine start control method of the P2 hybrid vehicle according to claim 1, characterized by, The method of determining whether a vehicle has a shifting tendency based on its operating condition includes: Determine whether the vehicle's acceleration is positive.

3. The engine start control method of the P2 hybrid vehicle according to claim 1, characterized by, The preset conditions for starting the motor in reverse include: The vehicle's high-voltage system is normal, the motor is enabled normally, and the remaining power battery has reached the preset charge level.

4. The engine start control method of a P2 hybrid vehicle according to claim 1, characterized by, The step of determining the engine starting method based on the current vehicle speed includes: Determine if the current vehicle speed is greater than the preset vehicle speed value; If the current vehicle speed is greater than the preset vehicle speed value, control the vehicle to drive backwards and start the engine.

5. The engine start control method of a P2 hybrid vehicle according to claim 1, characterized by, The step of determining the engine starting method based on the current vehicle speed includes: Determine if the current vehicle speed is greater than the preset vehicle speed value; If the current vehicle speed is less than or equal to the preset vehicle speed value, control the starter motor to start the engine.

6. An engine start control system of a P2 hybrid vehicle, characterized by, The engine start control method for a P2 architecture hybrid vehicle according to any one of claims 1 to 5 includes: The shift trend acquisition module is used to determine whether the vehicle has a shift trend based on the vehicle's operating conditions when the vehicle needs to start up. The preset condition judgment module is used to determine whether the vehicle meets the preset conditions for motor reverse to start based on the vehicle's operating conditions. The engine start control module is used to suppress the issuance of the start command when the vehicle is inclined to shift gears and the vehicle meets the preset conditions for motor reverse-dragging start, until the vehicle shifts gears and the transmission is disengaged, at which point the start command is issued to start the motor in reverse-dragging the engine.

7. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein, The processor, the communication interface, and the memory communicate with each other via the communication bus, characterized in that... The memory is used to store computer programs; The processor is configured to execute the engine start control method steps of any one of claims 1 to 5 for a P2 architecture hybrid vehicle by running the computer program stored in the memory.

8. A computer readable storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the engine start control method steps of the P2 architecture hybrid vehicle according to any one of claims 1 to 5 when running.

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