Engine starting control method and system of P2 architecture hybrid vehicle and electronic equipment

Abstract

The invention provides an engine starting control method and system of a P2 framework hybrid vehicle and electronic equipment, and relates to the technical field of engine starting of P2 framework hybrid vehicles, and the engine starting control method of the P2 framework hybrid vehicle comprises the steps that when a whole vehicle has a starting requirement, whether the vehicle has a gear shifting trend or not is judged according to the vehicle working condition; judging whether the vehicle meets a preset condition of motor reverse dragging starting or not according to the vehicle working condition; and if the vehicle has the gear shifting trend and the vehicle meets the preset condition of motor reverse dragging starting, the starting instruction is restrained from being sent out, and when the vehicle shifts gears and a transmission is out of space, the starting instruction is controlled to be sent out, so that a motor reverse dragging engine is started. The number of times of starting by reversely dragging the engine through the motor can be greatly increased, so that the use number of times of the starter is reduced, the service life of the starter can be prolonged to a great extent, and the use cost of a vehicle is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of engine starting of a P2 architecture hybrid vehicle, and in particular to an engine starting control method, system and electronic equipment of a P2 architecture hybrid vehicle. Background Art

[0002] The P2 architecture is a coaxial parallel system, where the engine and the motor are located on the same axis, and the clutch is located between the engine and the motor. In the prior art, the starting methods for the engine of a P2 architecture hybrid vehicle equipped with a starter type include three methods: starter start, motor reverse drag, and driving reverse drag. Among them, the motor reverse drag starting method refers to the motor as a power source to drive the engine to start, and the driving reverse drag starting method refers to using the vehicle's driving inertia to reverse the engine and inject fuel to start. And under most vehicle driving conditions, the starter is often used to start the engine; however, due to the limited life of the starter, frequent starting and stopping will greatly reduce the service life of the starter and increase the cost of vehicle use, while the motor reverse drag starting method requires the gearbox to be in a neutral state. The conditions are harsh and difficult to achieve. At the same time, the driving reverse drag has the problem of poor comfort due to the control accuracy of the pneumatic clutch and the motor torque compensation. Summary of the invention

[0003] The present application provides an engine start 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 an embodiment of the present application, a method for controlling engine start of a P2 architecture hybrid vehicle is provided, comprising: when the vehicle has a need to start the engine:

[0005] Determine whether the vehicle has a tendency to shift gears based on the vehicle operating conditions;

[0006] Determine whether the vehicle meets the preset conditions for reverse motor starting according to the vehicle operating conditions;

[0007] If the vehicle has a tendency to shift gears and the vehicle meets the preset conditions for the motor to reverse start the engine, the start command is suppressed until the vehicle shifts gears and the transmission is disengaged, then the start command is controlled to be issued so that the motor reverses the engine to start.

[0008] As an optional implementation, judging whether the vehicle has a gear shifting tendency according to the vehicle operating condition includes: judging whether the acceleration of the whole vehicle is a positive value.

[0009] As an optional implementation, the preset conditions for the motor reverse starter include: the vehicle high-voltage system is normal, the motor is enabled normally, and the remaining power of the power battery reaches a preset power.

[0010] As an optional implementation, it also includes: if the vehicle has no tendency to shift gears, 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 control of directly issuing the start command, it also includes: obtaining the current vehicle speed; and determining the engine starting method according to the current vehicle speed.

[0012] As an optional implementation, determining the engine starting method according to the current vehicle speed includes: judging 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: judging 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 to start the engine.

[0014] According to another aspect of an embodiment of the present application, an engine starting control system for a P2 architecture hybrid vehicle is provided, including: a shifting trend acquisition module, used to determine whether the vehicle has a shifting trend according to the vehicle operating condition when the whole vehicle has a starting demand; a preset condition judgment module, used to determine whether the vehicle meets the preset conditions for reverse motor starting according to the vehicle operating condition; an engine starting control module, used to suppress the issuance of a starting command when the vehicle has a shifting trend and the vehicle meets the preset conditions for reverse motor starting, until the vehicle shifts gears and the transmission is disengaged, and then control the issuance of the starting command to start the engine by reverse motor starting.

[0015] According to another aspect of an embodiment of the present application, an electronic device is provided, 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, and the memory is used to store a computer program; and the processor is used to execute the steps of the engine start control method for a P2 architecture hybrid vehicle by running the computer program stored in the memory.

[0016] According to another aspect of an embodiment of the present application, a computer-readable storage medium is provided, wherein a computer program is stored in the storage medium, wherein the computer program is configured to execute the steps of the engine start control method for a P2 architecture hybrid vehicle when running.

[0017] In the embodiment of the present application, an engine start control method for a P2 architecture hybrid vehicle is provided. When the whole vehicle has a start demand, it is determined whether the vehicle has a shifting tendency according to the vehicle operating condition; it is determined whether the vehicle meets the preset conditions for reverse motor start according to the vehicle operating condition; if the vehicle has a shifting tendency and the vehicle meets the preset conditions for reverse motor start, the start command is suppressed until the vehicle shifts gears and the transmission is unloaded, and the start command is controlled to be issued so that the motor reverses the engine to start. This control method can greatly increase the number of times the engine is started by reverse motor, thereby reducing the number of times the starter is used, and can greatly extend the service life of the starter, thereby reducing the use cost of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a flow chart of an optional engine start control method for a P2 architecture hybrid vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] like Figure 1 As shown, the embodiment of the present application provides an engine start control method for a P2 architecture hybrid vehicle, comprising: when the vehicle has a start demand:

[0024] S1 determines whether the vehicle has a tendency to shift gears based on the vehicle operating conditions;

[0025] S2 determines whether the vehicle meets the preset conditions for reverse motor starting according to the vehicle operating conditions;

[0026] S3: If the vehicle has a tendency to shift gears and the vehicle meets the preset conditions for starting the engine by reverse dragging of the motor, the start command is suppressed until the vehicle shifts gears and the transmission is disengaged, and the start command is controlled to be issued so that the motor reverse drags the engine to start.

[0027] Specifically, when the vehicle needs to start, that is, when the vehicle needs the participation of the engine, for example, when a higher power output is required, such as high-speed driving, climbing or accelerating, the engine needs to be started to provide additional power to ensure vehicle performance; in a low temperature environment, the engine may need to be started to warm up, improve the fluidity of the lubricating oil, and protect the internal parts of the engine; or when the vehicle's air conditioning system or other auxiliary equipment powered by the engine is started, especially in electric mode, the engine may need to be started for mechanical accessories to work. Then at this time, it is determined whether the vehicle has a shifting trend. If the vehicle has a shifting trend, then in a short time, the transmission will shift and be unloaded. At the unloading moment, the motor is decoupled from the vehicle wheel end, and the engine can be reversely started. Therefore, the motor can be used to reversely start the engine. Therefore, when the vehicle has a need to start and it is identified that the vehicle has a shifting trend, the issuance of the start command can be suppressed first, waiting for the vehicle to shift, and the start command is sent after the transmission is unloaded to realize the reverse start of the motor. Among them, the start command refers to the command signal used to control the start of the engine.

[0028] In addition, in order to realize the reverse start of the engine by the motor, the vehicle needs to meet the preset conditions of the motor reverse start. The preset conditions, i.e., the minimum conditions that the motor can reverse start the engine, are not further limited in this application and can be selected according to actual conditions.

[0029] This control method can greatly increase the number of times the engine is started by reverse dragging with an electric motor, thereby reducing the number of times the starter is used, and can greatly extend the service life of the starter, thereby reducing the use cost of the vehicle.

[0030] In addition, it should be noted that a preset inhibition time can also be set, that is, if the vehicle has a tendency to shift gears and the vehicle meets the preset conditions for the motor to reverse start, after the start instruction is issued, if the transmission has not shifted gears within the preset time, the start instruction will be directly issued without waiting for the shifting moment. However, this application does not limit the preset inhibition time, which can be determined according to the selection and working conditions of the whole vehicle.

[0031] As an optional implementation, judging whether the vehicle has a gear shifting tendency according to the vehicle operating condition includes: judging whether the acceleration of the whole vehicle is a positive value.

[0032] Specifically, whether the vehicle is accelerating can be used as a condition to characterize whether the vehicle has an accelerating gear shifting tendency. It is judged whether the vehicle is accelerating, that is, whether there is a gear shifting tendency. If the vehicle has a gear shifting tendency, the start command is suppressed until the transmission gear is disengaged. At this time, the engine is started by reverse dragging using the motor.

[0033] As an optional implementation, the preset conditions for the motor reverse starter include: the vehicle high-voltage system is normal, the motor is enabled normally, and the remaining power of the power battery reaches a preset power.

[0034] Specifically, when the vehicle's high-voltage system is normal, the motor is enabled normally, and the remaining power of the power battery reaches a preset power level, the motor can reversely start the engine when the vehicle is unloaded, ensuring stable starting of the engine and improving the driving experience of the vehicle.

[0035] As an optional implementation, it also includes: if the vehicle has no tendency to shift gears, 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 control of directly issuing the start command, it also includes: obtaining the current vehicle speed; and determining the engine starting method according to the current vehicle speed.

[0037] As an optional implementation, determining the engine starting method according to the current vehicle speed includes: judging 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: judging 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 to start the engine.

[0039] According to another aspect of an embodiment of the present application, an engine starting control system for a P2 architecture hybrid vehicle is provided, including: a shifting trend acquisition module, used to determine whether the vehicle has a shifting trend according to the vehicle operating condition when the whole vehicle has a starting demand; a preset condition judgment module, used to determine whether the vehicle meets the preset conditions for reverse motor starting according to the vehicle operating condition; an engine starting control module, used to suppress the issuance of a starting command when the vehicle has a shifting trend and the vehicle meets the preset conditions for reverse motor starting, until the vehicle shifts gears and the transmission is disengaged, and then control the issuance of the starting command to start the engine by reverse motor starting.

[0040] According to another aspect of an embodiment of the present application, an electronic device is provided, 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, and the memory is used to store a computer program; and the processor is used to execute the steps of the engine start control method for a P2 architecture hybrid vehicle by running the computer program stored in the memory.

[0041] According to another aspect of an embodiment of the present application, a computer-readable storage medium is provided, wherein a computer program is stored in the storage medium, wherein the computer program is configured to execute the steps of the engine start control method for a P2 architecture hybrid vehicle when running.

[0042] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0043] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0044] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0045] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

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

[0047] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0048] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0049] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling engine start of a P2 architecture hybrid vehicle, characterized in that: include: When the vehicle needs to be started: Determine whether the vehicle has a tendency to shift gears based on the vehicle operating conditions; Determine whether the vehicle meets the preset conditions for reverse motor starting according to the vehicle operating conditions; If the vehicle has a tendency to shift gears and the vehicle meets the preset conditions for the motor to reverse start the engine, the start command is suppressed until the vehicle shifts gears and the transmission is disengaged, then the start command is controlled to be issued so that the motor reverses the engine to start.

2. The engine start control method for a P2 architecture hybrid vehicle as claimed in claim 1, characterized in that: The determining whether the vehicle has a gear shifting tendency according to the vehicle operating condition includes: Determine whether the vehicle acceleration is positive.

3. The engine start control method for a P2 architecture hybrid vehicle as claimed in claim 1, characterized in that: The preset conditions for the motor to start the machine in reverse include: The vehicle's high-voltage system is normal, the motor is enabled normally, and the remaining power of the power battery reaches the preset power.

4. The engine start control method for a P2 architecture hybrid vehicle as claimed in claim 1, characterized in that: Also includes: If the vehicle has no tendency to shift gears, and / or the vehicle does not meet the preset conditions for motor reverse starting, the start command is controlled to be issued directly.

5. The engine start control method for a P2 architecture hybrid vehicle as claimed in claim 4, characterized in that: After the control of directly issuing the startup instruction, the method further includes: Get the current vehicle speed; An engine starting mode is determined according to the current vehicle speed.

6. The engine start control method for a P2 architecture hybrid vehicle as claimed in claim 5, characterized in that: Determining the engine starting mode according to the current vehicle speed includes: Determine 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, the vehicle is controlled to reverse and the engine is started.

7. The engine start control method for a P2 architecture hybrid vehicle as claimed in claim 5, characterized in that: Determining the engine starting mode according to the current vehicle speed includes: Determine 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, the starter is controlled to start the engine.

8. An engine start control system for a P2 architecture hybrid vehicle, characterized in that: include: The gear shift trend acquisition module is used to determine whether the vehicle has a gear shift trend according to the vehicle operating conditions when the vehicle has a need to start the engine; A preset condition judgment module is used to judge whether the vehicle meets the preset condition of motor reverse start according to the vehicle working condition; The engine start control module is used to suppress the issuance of the start command when the vehicle has a tendency to shift gears and the vehicle meets the preset conditions for starting the engine by reverse dragging of the motor, until the vehicle shifts gears and the transmission is disengaged, and then controls the issuance of the start command to start the engine by reverse dragging of the motor.

9. 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, wherein: The memory is used to store computer programs; The processor is used to execute the engine start control method steps of the P2 architecture hybrid vehicle according to any one of claims 1 to 7 by running the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the engine start control method for a P2 architecture hybrid vehicle according to any one of claims 1 to 7 when running.

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