Engine control method, device, equipment and storage medium

Abstract

The present invention belongs to the field of automobile driving technology, and discloses an engine control method, device, equipment and storage medium; the method comprises: obtaining current vehicle parameters, the current vehicle parameters comprising at least one of the current vehicle speed, the current vehicle demand torque and the current battery pack power; when the current vehicle parameters meet preset conditions, judging whether the engine is in a cold state; when the engine is in a cold state, controlling the engine to perform a cold start; the present invention makes multiple judgments on the current vehicle parameters and then starts the engine according to the judgment results, thereby solving the problem that the engine frequently skips the cold start because the battery pack of a non-plug-in hybrid vehicle is small, resulting in too low battery pack power or too large demand torque when starting the engine, effectively reducing the skipping of the engine cold start and achieving the effect of reducing the engine pollutant emissions.

Description

Technical Field

[0001] The present invention relates to the field of automobile driving technology, and in particular to an engine control method, device, equipment and storage medium. Background Art

[0002] At present, with the rapid development of new energy vehicles, major automobile manufacturers are gradually developing and producing non-plug-in hybrid vehicles to reduce vehicle fuel consumption and emissions. The battery pack capacity of non-plug-in hybrid vehicles is generally low, and the engine is mainly used to drive the vehicle. Therefore, the engine starts frequently, and the cold start control of the engine must be done well. On the premise of meeting emission requirements, the engine can be started without affecting drivability and power.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide an engine control method, which aims to solve the technical problem in the prior art that when a non-plug-in hybrid vehicle needs to start the engine, the battery pack power is too low or the required torque is too large, causing the engine to frequently skip cold start.

[0005] To achieve the above object, the present invention provides an engine control method, the method comprising:

[0006] Acquiring current vehicle parameters, wherein the current vehicle parameters include at least one of a current vehicle speed, a current vehicle required torque, and a current battery pack power;

[0007] When the current vehicle parameters meet the preset conditions, determining whether the engine is in a cold state;

[0008] When the engine is in a cold state, the engine is controlled to perform a cold start.

[0009] Optionally, the preset condition includes a first preset battery pack power;

[0010] When the current vehicle parameters meet the preset conditions, before determining whether the engine is in a cold state, the method further includes:

[0011] Determining whether the current battery pack power is less than the first preset power;

[0012] When the current battery pack power is less than or equal to the first preset power, it is determined that the current vehicle parameters meet the preset conditions.

[0013] Optionally, the preset condition further includes a first preset required torque;

[0014] When the current vehicle parameters meet the preset conditions, before determining whether the engine is in a cold state, the method further includes:

[0015] When the current battery pack power is greater than the first preset power, determining whether the current vehicle required torque is greater than the first preset required torque;

[0016] When the current vehicle demand torque is greater than the first preset demand torque, it is determined that the current vehicle parameters meet the preset conditions.

[0017] Optionally, the preset condition further includes a preset vehicle speed and a second preset required torque;

[0018] When the current vehicle parameters meet the preset conditions, before determining whether the engine is in a cold state, the method further includes:

[0019] When the current vehicle demand torque is less than or equal to the first preset demand torque, determining whether the current vehicle speed is greater than or equal to the preset vehicle speed and whether the current vehicle demand torque is greater than the second preset demand torque;

[0020] When the current vehicle speed is greater than or equal to the preset vehicle speed and the current vehicle demand torque is less than or equal to the second preset demand torque, it is determined that the current vehicle parameters meet the preset conditions and the second preset demand torque is less than the first preset demand torque.

[0021] Optionally, when the engine is in a cold state, controlling the engine to perform a cold start includes:

[0022] Acquiring the current battery pack power during the engine cold start process;

[0023] When the current battery pack power is less than or equal to the second preset power, the cold start is skipped and the engine output torque is controlled;

[0024] When the current battery pack power is greater than the second preset power, the engine is controlled to perform a cold start, and the second preset power is less than the first preset power.

[0025] Optionally, determining whether the engine is in a cold state includes:

[0026] Get engine temperature;

[0027] It is determined whether the engine is in a cold state according to the engine temperature.

[0028] Optionally, when the engine is in a cold state, controlling the engine to perform a cold start includes:

[0029] Acquiring a current vehicle demand torque during a cold start of the engine;

[0030] When the engine is in a cold state, determining whether the current vehicle demand torque is greater than the maximum motor torque;

[0031] When the current vehicle torque is greater than the maximum motor torque, the cold start is skipped and the engine output torque is controlled;

[0032] When the current vehicle torque is less than or equal to the maximum motor torque, the engine is controlled to perform a cold start.

[0033] In addition, to achieve the above object, the present invention further provides an engine control device, the engine control device comprising:

[0034] In addition, to achieve the above-mentioned purpose, the present invention also proposes an engine control device, which includes: a memory, a processor, and an engine control program stored in the memory and executable on the processor, and the engine control program is configured to implement the steps of the engine control method described above.

[0035] In addition, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which an engine control program is stored, and when the engine control program is executed by a processor, the steps of the engine control method described above are implemented.

[0036] The present invention makes multiple judgments on the current vehicle parameters, starts the engine according to the judgment results, and limits the engine starting state according to the current parameters of the vehicle. This effectively solves the problem that the battery pack of non-plug-in hybrid vehicles is small, and when the engine needs to be started, the battery pack power is too low or the required torque is too large, causing the engine to frequently skip cold starts. This effectively reduces the probability of the engine skipping cold starts, achieving the effect of reducing engine pollutant emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of an engine control device in a hardware operating environment involved in an embodiment of the present invention;

[0038] Figure 2 It is a flowchart of a first embodiment of an engine control method of the present invention;

[0039] Figure 3 It is a flow chart of a second embodiment of an engine control method of the present invention;

[0040] Figure 4 A schematic diagram of the judgment logic of an embodiment of an engine control method of the present invention;

[0041] Figure 5 It is a structural block diagram of the first embodiment of the engine control device of the present invention.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the structure of the engine control device of the hardware operating environment involved in the embodiment of the present invention.

[0045] like Figure 1 As shown, the engine control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0046] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the engine control device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0047] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and an engine control program.

[0048] exist Figure 1In the engine control device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the engine control device of the present invention can be set in the engine control device, and the engine control device calls the engine control program stored in the memory 1005 through the processor 1001, and executes the engine control method provided by the embodiment of the present invention.

[0049] The embodiment of the present invention provides an engine control method, referring to Figure 2 , Figure 2 The figure is a flow chart of a first embodiment of an engine control method of the present invention.

[0050] In this embodiment, the engine control method includes the following steps:

[0051] Step S10: Acquire current vehicle parameters, where the current vehicle parameters include at least one of current vehicle speed, current vehicle required torque, and current battery pack power.

[0052] It is understandable that the vehicle speed in the current vehicle parameters is obtained by the vehicle speed acquisition device of the vehicle itself, which can be an accelerometer, etc., and the present invention does not limit this; the vehicle demand torque is the torque converted by the opening and closing degree of the accelerator when the driver steps on the accelerator; the battery pack power is installed inside the car, and the battery pack power can be obtained through the power display.

[0053] It should be understood that the vehicle parameters are collected in real time, and the current vehicle parameters can be the current vehicle parameters during vehicle driving, or the current vehicle parameters when the car is started.

[0054] It should be noted that obtaining the current vehicle parameters includes at least one of the current vehicle speed, the current vehicle demand torque and the current battery pack power. It can be obtaining any one of them, or any two of them, or all the parameters of the current vehicle speed, the current vehicle demand torque and the current battery pack power can be obtained according to actual needs.

[0055] Step S20: When the current vehicle parameters meet the preset conditions, determine whether the engine is in a cold state.

[0056] It can be understood that the current vehicle parameters meet the preset conditions, which means that any one of the current vehicle parameters, the current vehicle speed, the current vehicle required torque and the current battery pack power, meets the preset conditions corresponding to the parameters, or multiple parameters can meet the preset conditions corresponding to the parameters at the same time.

[0057] It should be understood that the preset condition corresponding to the current battery pack power includes a first preset battery pack power, which is 35%-42% of the maximum battery pack power, which may be 35%, 39%, or 36%, and may be adjusted according to different needs;

[0058] The preset conditions corresponding to the current vehicle demand torque include a first preset demand torque and a second demand torque; when the current vehicle is a car starting from a stopped state, the first preset demand torque can be any one of a motor torque of 200 torque and a wheel-end torque of 3000 torque; the second demand torque can be a wheel-end torque of 200 torque; the wheel-end torque refers to the torque achieved by the tire drive.

[0059] The preset condition corresponding to the current vehicle speed includes a first preset condition. During the driving process of the vehicle, the first preset vehicle speed is 50% of the current vehicle speed.

[0060] It should be noted that when the current vehicle parameters meet the preset conditions, it is determined whether the engine is in a cold state based on the current engine temperature.

[0061] It should be emphasized that the engine temperature can be read by a thermometer or obtained by other temperature collection methods, and the present invention is not limited to this.

[0062] Step S30: When the engine is in a cold state, controlling the engine to perform a cold start.

[0063] It is understandable that when the engine is in a cold state, the engine start is delayed by 10-15 seconds, during which the catalyst is ignited and heated to warm up the engine. The process of starting the engine after warming up is called a cold start.

[0064] It should be understood that a controller is provided inside the automobile, which obtains current vehicle parameters. When the current vehicle parameters meet preset conditions, the controller determines whether the engine is in a cold state, and when the engine is in a cold state, controls the engine to perform a cold start. If the engine is not cold, the engine output torque is started normally.

[0065] It should be noted that when controlling the engine for cold start, the current vehicle demand torque during the engine cold start process is obtained, and it is determined whether the current vehicle demand torque is greater than the maximum motor torque. The maximum motor torque here has no fixed value, and the maximum motor torque varies according to different vehicle motor specifications; when the current vehicle demand torque is less than or equal to the maximum motor torque, the engine is controlled to cold start; if the current vehicle demand torque is greater than the maximum motor torque, the cold start process is stopped and the engine output torque is directly controlled.

[0066] It should be emphasized that when controlling the engine to cold start, the current battery pack power during the engine cold start process can also be obtained; when the current battery pack power is less than or equal to the second preset power, the cold start is skipped and the engine output torque is controlled; the second preset power is 32%-39% of the maximum power of the battery pack, which can be 33%, 36%, or 37%, and can be adjusted according to different needs, and the second preset power is less than the first preset power. For example, the first preset power is 40% of the maximum power of the battery pack, and the second preset power is 35% of the maximum power of the battery pack. When the maximum power of the battery pack is 60Ah, the second preset power is 21Ah.

[0067] When the current battery pack power is greater than the second preset power, the engine is controlled to perform a cold start.

[0068] This embodiment compares the current vehicle parameters with the preset conditions. When the current vehicle parameters meet the preset conditions, it determines based on the engine temperature that the engine is in a cold state and performs a cold start. This avoids the problem of the engine frequently skipping the cold start when it is necessary to start the engine, resulting in excessive vehicle pollutant emissions and high fuel consumption during driving, and effectively reduces the probability of the engine skipping the cold start, achieving the effect of reducing the engine pollutant emissions.

[0069] refer to Figure 3 , Figure 3 It is a flow chart of a second embodiment of an engine control method of the present invention.

[0070] Based on the first embodiment, the engine control method of this embodiment further includes, before step S20:

[0071] Step S201: Determine whether the current battery pack power is less than the first preset power.

[0072] It should be understood that the current battery pack power in the current vehicle parameters is compared with the first preset power, and whether the current battery pack power meets the preset conditions is determined based on the comparison result; the first preset power is 35%-42% of the maximum power of the battery pack. For ease of understanding, if the current battery pack power is 24Ah, the maximum capacity of the vehicle battery pack is 60Ah, Ah is the unit of battery pack capacity, the first preset power is 35% of the maximum power of the battery pack, and the first preset power is 21Ah. By comparison, the current battery pack power of 24Ah is greater than the first preset power of 21Ah.

[0073] It should be noted that, when the current battery pack power is greater than the first preset power, it is determined whether the current vehicle required torque is greater than the first preset required torque;

[0074] If the current vehicle is in a stopped state, the current first preset demand torque is a wheel-end torque of 3000 torque, or it can be the wheel-end torque corresponding to when the current throttle starts to reach 90%; if the current vehicle is in a driving state, the current first preset demand torque is a wheel-end torque of 1300 torque. For ease of understanding, when the current vehicle is in a stopped state, the starting vehicle obtains a current vehicle demand torque of 800 torque, the first preset torque of the vehicle is 3000 torque, and the current vehicle demand torque is less than the first preset torque; if the current vehicle is 3050 torque, the current vehicle demand torque is greater than the first preset torque. If the current vehicle is in a driving state, the first preset demand torque is a wheel-end torque of 1300 torque, and the current vehicle demand torque is 1000 torque, and the current vehicle demand torque is less than the first preset demand torque.

[0075] When the current vehicle demand torque is greater than the first preset demand torque, it is determined that the current vehicle parameter meets the preset condition. When the current vehicle demand torque is less than or equal to the first preset demand torque, it is determined whether the current vehicle speed is greater than or equal to the preset vehicle speed and whether the current vehicle demand torque is greater than the second preset demand torque.

[0076] It should be emphasized that when the current vehicle demand torque is less than or equal to the first preset demand torque, it is determined whether the current vehicle speed is greater than or equal to the preset vehicle speed and whether the current vehicle demand torque is greater than the second preset demand torque, and the second preset demand torque is less than the first preset demand torque.

[0077] The preset vehicle speed is increased to 150% of the current vehicle speed. The vehicle speed is a continuously changing value. When judging this condition, the current vehicle speed is known, and the value corresponding to 150% of the current vehicle speed is calculated as the preset vehicle speed. The second preset required torque is the wheel-end torque, which can be 200 torque or 250 torque, and can be adjusted according to actual needs; for ease of understanding, when the current vehicle speed is 60km / h, the preset vehicle speed is 150% of the current vehicle speed of 60km / h, that is, the preset vehicle speed is 90km / h.

[0078] When the current vehicle speed is greater than or equal to the preset vehicle speed and the current vehicle demand torque is less than or equal to the second preset demand torque, it is determined that the current vehicle parameters meet the preset conditions. For example, when the current vehicle speed is 60 km / h, the preset vehicle speed is 150% of the current vehicle speed of 60 km / h, that is, the preset vehicle speed is 90 km / h, the current vehicle demand torque is 250 torque, and the second preset demand torque is 230 torque, then it is determined that when the current vehicle speed is greater than or equal to the preset vehicle speed and the current vehicle demand torque is less than or equal to the second preset demand torque, the current vehicle parameters meet the preset conditions.

[0079] Step S202: When the current battery pack power is less than or equal to the first preset power, it is determined that the current vehicle parameters meet the preset conditions.

[0080] It should be understood that the first preset power is 35%-42% of the maximum power of the battery pack. For ease of understanding, the current battery pack power is 19Ah, the maximum power of the battery pack is 60Ah, and the first preset power is 35% of the maximum power of the battery pack. The first preset power is 21Ah. At this time, the current battery pack power is less than the first preset power, and it is determined that the current vehicle parameters meet the preset conditions.

[0081] It is understandable that there are three judgments for determining whether the current vehicle parameters meet the preset conditions. The first judgment is that the current battery pack power is less than or equal to the first preset power, then the current vehicle parameters are judged to meet the preset conditions; the second judgment is that the current vehicle demand torque is greater than the first preset demand torque, then the current vehicle parameters are judged to meet the preset conditions; the third judgment is that the current vehicle speed is greater than or equal to the preset speed and the current vehicle demand torque is less than or equal to the second preset demand torque, then the current vehicle parameters are judged to meet the preset conditions. It should be noted that any one judgment can meet the preset conditions, or multiple judgments can meet the preset conditions at the same time, then the controller set inside the car sends an engine start command. Please refer to Figure 4 When all judgments do not meet the preset conditions, the engine remains stopped.

[0082] This embodiment compares the current vehicle speed, the current vehicle demand torque and the current battery pack power in the current vehicle parameters with the preset conditions. If any one of the current parameters meets the preset conditions, the engine is started when the engine is cold. By comparing the current parameters with the preset conditions, the conditions for starting the engine are further limited, and it is easier to enter the cold start step under the premise of starting the engine, thereby avoiding the problem of frequently skipping the cold start during the engine starting process, and effectively reducing the amount of pollution emitted by the engine due to the engine frequently skipping the cold start.

[0083] In addition, an embodiment of the present invention further provides a storage medium, on which an engine control program is stored. When the engine control program is executed by a processor, the steps of the engine control method described above are implemented.

[0084] Reference Figure 5 , Figure 5 It is a structural block diagram of the first embodiment of the engine control device of the present invention.

[0085] like Figure 5 As shown, the engine control device proposed in the embodiment of the present invention includes:

[0086] A parameter acquisition module 10 is used to acquire current vehicle parameters, wherein the current vehicle parameters include at least one of current vehicle speed, current vehicle required torque, and current battery pack power;

[0087] The engine control module 20 is used to determine whether the engine is in a cold state when the current vehicle parameters meet the preset conditions;

[0088] The engine control module 20 is also used to control the engine to perform a cold start when the engine is in a cold state.

[0089] This embodiment compares the current vehicle parameters with the preset conditions. When the current vehicle parameters meet the preset conditions, it determines based on the engine temperature that the engine is in a cold state and performs a cold start. This avoids the problem of the engine frequently skipping the cold start when it is necessary to start the engine, resulting in excessive vehicle pollutant emissions and high fuel consumption during driving, and effectively reduces the probability of the engine skipping the cold start, achieving the effect of reducing the engine pollutant emissions.

[0090] In one embodiment, the engine control module 20 is further used to determine whether the current battery pack power is less than the first preset power;

[0091] When the current battery pack power is less than or equal to the first preset power, it is determined that the current vehicle parameters meet the preset conditions.

[0092] In one embodiment, the engine control module 20 is further configured to determine whether the current vehicle required torque is greater than the first preset required torque when the current battery pack power is greater than the first preset power;

[0093] When the current vehicle demand torque is greater than the first preset demand torque, it is determined that the current vehicle parameters meet the preset conditions.

[0094] In one embodiment, the engine control module 20 is further configured to determine whether the current vehicle speed is greater than or equal to the preset vehicle speed and whether the current vehicle demand torque is greater than the second preset demand torque when the current vehicle demand torque is less than or equal to the first preset demand torque;

[0095] When the current vehicle speed is greater than or equal to the preset vehicle speed and the current vehicle demand torque is less than or equal to the second preset demand torque, it is determined that the current vehicle parameters meet the preset conditions and the second preset demand torque is less than the first preset demand torque.

[0096] In one embodiment, the engine control module 20 is further used to obtain the current battery pack power during the cold start process of the engine;

[0097] When the current battery pack power is less than or equal to the second preset power, the cold start is skipped and the engine output torque is controlled;

[0098] When the current battery pack power is greater than the second preset power, the engine is controlled to perform a cold start, and the second preset power is less than the first preset power.

[0099] In one embodiment, the engine control module 20 is further used to obtain the engine temperature;

[0100] It is determined whether the engine is in a cold state according to the engine temperature.

[0101] In one embodiment, the engine control module 20 is further configured to obtain the current vehicle demand torque during the cold start process of the engine;

[0102] When the engine is in a cold state, determining whether the current vehicle demand torque is greater than the maximum motor torque;

[0103] When the current vehicle torque is greater than the maximum motor torque, the cold start is skipped and the engine output torque is controlled;

[0104] When the current vehicle torque is less than or equal to the maximum motor torque, the engine is controlled to perform a cold start.

[0105] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0106] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0107] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0108] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0109] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0110] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An engine control method, characterized in that: The engine control method comprises: Acquire current vehicle parameters, wherein the current vehicle parameters include current battery pack power; When the current vehicle parameters meet the preset conditions, determining whether the engine is in a cold state, the preset conditions including a first preset power; When the engine is in a cold state, controlling the engine to perform a cold start; When the current vehicle parameters meet the preset conditions, before determining whether the engine is in a cold state, the method further includes: Determining whether the current battery pack power is less than the first preset power; When the current battery pack power is less than or equal to the first preset power, determining that the current vehicle parameter meets the preset condition; When the engine is in a cold state, controlling the engine to perform a cold start comprises: Acquiring the current battery pack power during the engine cold start process; When the current battery pack power is less than or equal to the second preset power, the cold start is skipped and the engine output torque is controlled; When the current battery pack power is greater than the second preset power, the engine is controlled to perform a cold start, and the second preset power is less than the first preset power.

2. The engine control method according to claim 1, characterized in that: The preset condition also includes a first preset required torque; the current vehicle parameter also includes a current vehicle required torque; When the current vehicle parameters meet the preset conditions, before determining whether the engine is in a cold state, the method further includes: When the current battery pack power is greater than the first preset power, determining whether the current vehicle required torque is greater than the first preset required torque; When the current vehicle demand torque is greater than the first preset demand torque, it is determined that the current vehicle parameters meet the preset conditions.

3. The engine control method according to claim 2, characterized in that: The preset condition also includes a preset vehicle speed and a second preset required torque; the current vehicle parameter also includes a current vehicle speed; When the current vehicle parameters meet the preset conditions, before determining whether the engine is in a cold state, the method further includes: When the current vehicle demand torque is less than or equal to the first preset demand torque, determining whether the current vehicle speed is greater than or equal to the preset vehicle speed and whether the current vehicle demand torque is greater than the second preset demand torque; When the current vehicle speed is greater than or equal to the preset vehicle speed and the current vehicle demand torque is less than or equal to the second preset demand torque, it is determined that the current vehicle parameters meet the preset conditions and the second preset demand torque is less than the first preset demand torque.

4. The engine control method according to any one of claims 1 to 3, characterized in that: The step of determining whether the engine is in a cold state comprises: Get engine temperature; It is determined whether the engine is in a cold state according to the engine temperature.

5. The engine control method according to any one of claims 1 to 3, characterized in that: When the engine is in a cold state, controlling the engine to perform a cold start comprises: Acquiring a current vehicle demand torque during a cold start of the engine; When the engine is in a cold state, determining whether the current vehicle demand torque is greater than the maximum motor torque; When the current vehicle demand torque is greater than the maximum motor torque, the cold start is skipped and the engine output torque is controlled; When the current vehicle demand torque is less than or equal to the maximum motor torque, the engine is controlled to perform a cold start.

6. An engine control device, characterized in that: The engine control device comprises: A parameter acquisition module, used to acquire current vehicle parameters, wherein the current vehicle parameters include at least one of current vehicle speed, current vehicle required torque, and current battery pack power; an engine control module, configured to determine whether the engine is in a cold state when the current vehicle parameters meet a preset condition, wherein the preset condition includes a first preset power; The engine control module is further used to control the engine to perform a cold start when the engine is in a cold state; The engine control module is further used to determine whether the current battery pack power is less than the first preset power; when the current battery pack power is less than or equal to the first preset power, determine that the current vehicle parameters meet the preset conditions; The engine control module is also used to obtain the current battery pack power during the engine cold start process; when the current battery pack power is less than or equal to a second preset power, the cold start is skipped and the engine output torque is controlled; when the current battery pack power is greater than the second preset power, the engine is controlled to cold start, and the second preset power is less than the first preset power.

7. An engine control device, characterized in that: The device comprises: a memory, a processor, and an engine control program stored in the memory and executable on the processor, wherein the engine control program is configured to implement the engine control method according to any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium stores an engine control program, and when the engine control program is executed by the processor, the engine control method according to any one of claims 1 to 5 is implemented.

Images