CN115476838A

CN115476838A - Engine start control method, engine start control device, vehicle, computer-readable storage medium, and computer program product

Info

Publication number: CN115476838A
Application number: CN202211184830.5A
Authority: CN
Inventors: 刘加明; 于长虹; 刘元治; 梁赫奇
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-12-16

Abstract

The invention discloses an engine starting control method, an engine starting control device, a vehicle, a computer readable storage medium and a computer program product. The control method comprises the following steps: judging whether the current gear is in a D gear or not; if the current gear is in the D gear, applying oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch; controlling a driving motor to increase extra dragging torque on the basis of the original torque requirement; when the engine speed reaches the ignition speed, the oil pressure of the clutch is removed, and the additionally applied dragging torque of the driving motor is controlled to be cleared. According to the embodiment of the invention, the hybrid vehicle controller applies oil pressure to the clutch to enable the clutch to be attached to the driving disc and the driven disc to drive the driving disc to rotate and rise; and controlling the driving motor to increase extra dragging torque for starting the engine; when the engine reaches the ignition rotating speed, the engine automatically injects oil for ignition; the engine is started under the condition that the generator cannot drag.

Description

Engine start control method, engine start control device, vehicle, computer-readable storage medium, and computer program product

Technical Field

The present invention relates to the field of automotive technologies, and in particular, to an engine start control method, an engine start control apparatus, a vehicle, a computer-readable storage medium, and a computer program product.

Background

In a vehicle with a double-motor series-parallel hybrid configuration, an engine is dragged by a generator to ignite and start under normal conditions, and the generator cannot be dragged under the condition of generator failure or power battery failure. In order to ensure that the engine can still be started by ignition under the condition of generator failure or power battery failure, and ensure the smoothness of driving, an engine starting control method needs to be designed.

In the prior art, an engine and a motor are controlled to generate power to propel a vehicle based on navigation data, power output of a power transmission system and other data, or a dynamic coordination control method corresponding to engine starting and intervention is determined according to the starting mode of the engine and the working state of a clutch. However, the engine starting control method adopted by the prior technical scheme is more complicated, and a double-motor series-parallel system is not involved.

Disclosure of Invention

The invention provides an engine starting control method, an engine starting control device, a vehicle, a computer readable storage medium and a computer program product, which are used for starting an engine under the condition that a generator cannot be dragged.

According to an aspect of the present invention, there is provided an engine start control method adapted to a dual-motor hybrid vehicle including an engine, a drive motor, and a generator; the output end of the engine is meshed with the generator through a gear, the driving motor is meshed with the system speed reducing mechanism through a gear, and the engine and the system speed reducing mechanism realize power transmission and interruption through a clutch; the engine start control method includes:

judging whether the current gear is in a D gear or not;

if the current gear is in the D gear, applying oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch;

controlling the driving motor to increase extra dragging torque on the basis of the original torque requirement;

and when the rotating speed of the engine reaches the ignition rotating speed, removing the oil pressure of the clutch, and simultaneously controlling the additionally applied dragging torque of the driving motor to be reset.

Optionally, after controlling the driving motor to add an additional dragging torque on the basis of the original torque demand and before removing the oil pressure of the clutch, the method further comprises:

the oil pressure applied to the clutch is controlled to gradually decrease as the engine speed increases.

Optionally, determining whether the current gear is after the D gear further includes:

and if the current gear is not in the D gear, prompting to engage the D gear and prompting to operate the vehicle speed to a preset speed.

Optionally, before determining whether the current gear is in the D gear, the method further includes: after an engine starting signal is received, if the generator does not have the capacity of dragging the engine, judging whether the current gear is in a D gear or not is carried out.

Optionally, the method further comprises: and if the generator has the capacity of dragging the engine, controlling the generator to drag the engine to start.

According to another aspect of the present invention, there is provided an engine start control apparatus including:

the judging module is used for judging whether the current gear is in a D gear or not;

the oil pressure applying module is used for applying oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch when the current gear is in the D gear;

the dragging torque applying module is used for controlling the driving motor to increase extra dragging torque on the basis of the original torque requirement;

and the torque zero clearing module is used for removing the oil pressure of the clutch when the rotating speed of the engine reaches the ignition rotating speed and simultaneously controlling the dragging torque additionally applied by the driving motor to zero.

Optionally, the oil pressure applying module includes:

and the oil pressure adjusting module is used for controlling the oil pressure applied to the clutch to be gradually reduced along with the increase of the engine rotating speed.

According to another aspect of the present invention, there is provided a two-motor series-parallel hybrid vehicle including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the engine start control method described in any of the embodiments above.

According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to implement the engine start control method described in any of the above embodiments when executed.

According to another aspect of the present invention, there is provided a computer program product comprising a computer program which, when executed by a processor, implements the engine start control method described in any of the embodiments above.

According to the technical scheme of the embodiment of the invention, the hybrid vehicle controller applies oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch, so that the clutch is attached to the driving disc and the driven disc drives the driving disc to rotate and rise; the hybrid power vehicle controller controls the driving motor to increase extra dragging torque on the basis of the original torque requirement, so that the engine is started; when the engine reaches the ignition rotating speed and the self-fuel injection ignition is started, the hybrid vehicle controller removes the oil pressure applied to the clutch, so that the clutch is separated from the driving disc, and simultaneously, the dragging torque additionally applied by the driving motor is controlled to be reset, namely, the engine starting is finished; the engine is started under the condition that the generator cannot be dragged, impact on the wheel end in the starting process of the engine is avoided, and running smoothness is guaranteed.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hybrid vehicle with a dual-motor hybrid according to an embodiment of the present invention;

FIG. 2 is a flowchart of an engine start control method provided by an embodiment of the present invention;

FIG. 3 is a logic diagram of an engine start control method provided by an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an engine start control apparatus according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a hybrid vehicle control unit implementing the engine start control method according to the embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The embodiment of the invention provides an engine starting control method, which is suitable for a double-motor hybrid vehicle, and fig. 1 is a structural schematic diagram of the double-motor hybrid vehicle provided by the embodiment of the invention, wherein the double-motor hybrid vehicle comprises an engine 1, a driving motor 2 and a generator 3; the output end of the engine 1 is meshed with the generator 3 through a gear, the driving motor 2 is meshed with the system speed reducing mechanism 4 through a gear, and the engine 1 and the system speed reducing mechanism 4 realize power transmission and interruption through the clutch 5. Fig. 2 is a flowchart of an engine start control method according to an embodiment of the present invention, and referring to fig. 2, the control method includes:

s101, judging whether the current gear is in the D gear.

Specifically, when the generator cannot drag the engine due to generator failure or power battery failure, and the dual-motor hybrid-driven system needs to start the engine, the hybrid vehicle controller HCU controls the dual-motor hybrid-driven system to enter a clutch slipping-off process, and the hybrid vehicle controller judges whether the current gear is in the D gear; wherein, the D gear is the forward gear.

And S102, if the current gear is in the D gear, applying oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch.

Specifically, the maximum slipping torque that the clutch can bear and the oil pressure corresponding to the maximum slipping torque can be obtained by the characteristics of the clutch. The friction-slipping torque is the torque transmitted by the clutch in the friction-slipping state, i.e. the clutch is jointed with a driving disc and a driven disc, and has a relative rotating speed and a gradually reduced rotating speed difference. The hybrid vehicle controller applies oil pressure to the clutch to enable the clutch to be attached to the driving disc and the driven disc, and the larger the applied oil pressure is, the tighter the attachment of the clutch to the driving disc and the driven disc is. The hybrid power vehicle control unit applies oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch, and is used for enabling the clutch driving disc and the clutch driven disc to be in a critical state of being attached infinitely but not attached tightly.

And S103, controlling the driving motor to increase extra dragging torque on the basis of the original torque requirement.

Specifically, the original torque demand of the driving motor is the torque output by the driving motor before the engine is started. The extra drag torque, i.e., the maximum slip torque that the clutch can withstand, is used to crank the engine. Before the engine is started, the torque output by the driving motor is used for driving an automobile, when the engine is required to be started, the hybrid vehicle controller controls the driving motor to increase extra dragging torque on the basis of the original torque requirement, and the extra dragging torque is used for starting the engine to keep the driving smoothness.

And S104, when the rotating speed of the engine reaches the ignition rotating speed, removing the oil pressure of the clutch, and simultaneously controlling the additionally applied dragging torque of the driving motor to be cleared.

Specifically, when the engine speed reaches the ignition speed, the engine may self-ignite by injection, i.e., the engine starts. After the engine is started, the hybrid vehicle controller removes the oil pressure applied to the clutch, so that the clutch is separated from the driving disc, and simultaneously, the dragging torque additionally applied by the driving motor is controlled to be reset, namely the engine is started, and the additional dragging torque is not required to be applied.

According to the technical scheme of the embodiment, the hybrid vehicle controller applies oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch, so that the clutch is attached to the driving disc and the driven disc, and the driven disc drives the driving disc to rotate and rise; the hybrid vehicle controller controls the driving motor to increase extra dragging torque on the basis of the original torque requirement, so that the engine is started; when the engine reaches the ignition rotating speed and the self-fuel injection ignition is started, the hybrid vehicle controller removes the oil pressure applied to the clutch, so that the clutch is separated from the driving disc, and simultaneously, the dragging torque additionally applied by the driving motor is controlled to be reset, namely, the engine starting is finished; the engine is started under the condition that the generator cannot be dragged, impact on the wheel end in the starting process of the engine is avoided, and running smoothness is guaranteed.

Fig. 3 is a logic diagram of an engine start control method according to an embodiment of the present invention, and referring to fig. 3, the control method includes:

after an engine starting signal is received, if the generator does not have the capacity of dragging the engine, judging whether the current gear is in a D gear or not; and if the generator has the capacity of dragging the engine, controlling the generator to drag the engine to start. If the current gear is not in the D gear, prompting to engage the D gear and prompting to operate the vehicle speed to a preset speed; and if the current gear is in the D gear, applying oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch. Controlling a driving motor to increase extra dragging torque on the basis of the original torque requirement; controlling the oil pressure applied to the clutch to gradually decrease as the engine speed increases; when the rotating speed of the engine reaches the ignition rotating speed, the oil pressure of the clutch is removed, and meanwhile dragging torque additionally applied by the driving motor is controlled to be reset.

Specifically, after receiving an engine start signal, the hybrid vehicle controller judges whether the generator has the capacity of dragging the engine, and if the generator has the capacity of dragging the engine, the hybrid vehicle controller controls the generator to drag the engine to start; and if the generator does not have the capacity of dragging the engine, the hybrid vehicle controller judges whether the current gear is in the D gear. If the current gear is not in the D gear, prompting to engage the D gear and prompting to operate the vehicle speed to a preset speed; the preset speed can be the ignition rotating speed of the engine and is used for enabling the vehicle speed to reach the dragging rotating speed of the engine, if the vehicle speed is too low, the dragging rotating speed cannot be reached, and the engine cannot be started by sliding friction. For example, if the current gear is a P gear, since the driving motor and the wheels cannot be mechanically decoupled, that is, the driven disc, the driving motor and the wheels of the clutch are engaged through gears, one of the driven disc, the driving motor and the wheels moves while the other devices move, and when the gear is the P gear, the wheels are not moved, the driven disc cannot move, and the engine cannot be slipped and started, the P gear engine cannot be started, a D gear running needs to be prompted to start the engine, and the vehicle speed needs to be greater than a preset speed.

Specifically, if the current gear is the D gear, the hybrid vehicle controller applies an oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque that the clutch can bear, so that the clutch main driving disc and the clutch driven disc are attached but not attached, and the rotation speed of the driving disc driven by the clutch driven disc gradually increases. The hybrid vehicle controller controls the driving motor to increase extra dragging torque on the basis of the original torque requirement, and is used for enabling the engine to start and driving smoothness. Along with the gradual rise of the rotating speed of the driving disc, namely the rise of the rotating speed of the engine, the sliding friction power generated by the clutch is increased, in order to avoid the influence of large sliding friction power on the service life of the clutch, the hybrid vehicle controller controls the oil pressure applied to the clutch to be gradually reduced, the sliding friction power generated by the clutch is reduced, but the joint of the driving disc and the driven disc of the clutch is still kept, and the driven disc continuously drives the rotating speed of the driving disc to rise; the sliding friction work is the work generated by the friction of the joint devices of the driving disc and the driven disc of the clutch, and the large sliding friction work can cause the abrasion and other influences on the clutch. When the engine speed reaches the ignition speed, the hybrid vehicle controller removes the oil pressure applied to the clutch, so that the clutch master and slave dynamic disks are completely separated, and simultaneously controls the additionally applied dragging torque of the driving motor to be reset, namely the engine is started up, and the additional dragging torque is not required to be applied. After the engine is successfully started, the hybrid vehicle controller prompts a driver that the engine is successfully started, and subsequent operation can be performed.

According to the technical scheme of the embodiment, the hybrid vehicle controller applies oil pressure corresponding to the maximum friction torque to the clutch according to the maximum friction torque which can be borne by the clutch, so that the clutch is attached to the driving disc and the driven disc, and the driven disc drives the driving disc to rotate and rise; the hybrid power vehicle controller controls the driving motor to increase extra dragging torque on the basis of the original torque requirement, so that the engine is started; when the engine reaches the ignition rotating speed and the self-fuel injection ignition is started, the hybrid vehicle controller removes the oil pressure applied to the clutch, so that the clutch is separated from the driving disc, and simultaneously, the dragging torque additionally applied by the driving motor is controlled to be reset, namely, the engine starting is finished; the engine can be started under the condition that the generator cannot be dragged, impact on the wheel end in the starting process of the engine is avoided, and running smoothness is guaranteed. Along with the increase of the rotating speed of the engine, the hybrid vehicle controller reduces the oil pressure applied to the clutch, limits the sliding friction work generated by the clutch and reduces the abrasion to the clutch.

Fig. 4 is a schematic structural diagram of an engine start control apparatus provided in an embodiment of the present invention, and referring to fig. 4, the apparatus includes:

the judging module 100 is used for judging whether the current gear is in a D gear or not;

the oil pressure applying module 200 is configured to apply an oil pressure corresponding to a maximum slipping torque to the clutch according to the maximum slipping torque that the clutch can bear when the current gear is in the D gear;

the oil pressure applying module 200 comprises an oil pressure adjusting module 201 for controlling the oil pressure applied to the clutch to gradually decrease along with the increase of the engine rotating speed;

the dragging torque applying module 300 is used for controlling the driving motor to increase extra dragging torque on the basis of the original torque requirement;

and the torque zero clearing module 400 is used for removing the oil pressure of the clutch when the rotating speed of the engine reaches the ignition rotating speed, and simultaneously controlling the additionally applied dragging torque of the driving motor to zero.

Specifically, the determination module 100, the oil pressure application module 200, the oil pressure adjustment module 201, the dragging torque application module 300, and the torque clearing module 400 are all integrated in the hybrid vehicle controller.

Fig. 5 is a schematic structural diagram of a hybrid vehicle controller implementing an engine start control method according to an embodiment of the present invention, and as shown in fig. 5, the hybrid vehicle controller 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, where the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the hybrid vehicle controller 10 may also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

A plurality of components in the hybrid vehicle controller 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the hybrid vehicle control unit 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.

Processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various dedicated Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, and so forth. The processor 11 performs the various methods and processes described above, such as an engine start control method.

In some embodiments, the engine start control method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed on hybrid vehicle control unit 10 via ROM 12 and/or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the engine start control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to execute the engine start control method by any other suitable means (e.g., by way of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user may provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired result of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The engine starting control method is characterized by being suitable for a double-motor series-parallel hybrid vehicle, wherein the double-motor series-parallel hybrid vehicle comprises an engine, a driving motor and a generator; the output end of the engine is meshed with the generator through a gear, the driving motor is meshed with a system speed reducing mechanism through a gear, and the engine and the system speed reducing mechanism realize power transmission and interruption through a clutch; the engine start control method includes:

judging whether the current gear is in a D gear or not;

2. The method of claim 1, after controlling the drive motor to add additional drag torque based on the original torque demand and before removing oil pressure from the clutch, further comprising:

3. The method of claim 1, wherein determining whether the current gear is after D-gear further comprises:

4. The method of any of claims 1-3, further comprising, prior to determining whether the current gear is in D-range: after an engine starting signal is received, if the generator does not have the capacity of dragging the engine, judging whether the current gear is in a D gear or not.

5. The method of claim 4, further comprising: and if the generator has the capacity of dragging the engine, controlling the generator to drag the engine to start.

6. An engine start control device characterized by comprising:

7. The apparatus of claim 6, wherein the oil pressure application module comprises:

and the oil pressure adjusting module is used for controlling the oil pressure applied to the clutch to be gradually reduced along with the increase of the rotating speed of the engine.

8. A dual-motor series-parallel hybrid vehicle, comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the engine start control method of any one of claims 1-5.

9. A computer-readable storage medium storing computer instructions for causing a processor to perform the engine start control method of any one of claims 1-5 when executed.

10. A computer program product, characterized in that the computer program product comprises a computer program which, when being executed by a processor, carries out the engine start control method of any one of claims 1-5.