A hybrid vehicle 100 km / h acceleration control method, system and vehicle

Abstract

The present invention discloses a 100 km / h acceleration control method, system and vehicle of a hybrid vehicle. The hybrid vehicle includes an engine, a motor and a clutch. The method includes: receiving a 100 km / h acceleration start signal; judging whether the engine speed of the hybrid vehicle in a series working condition meets a preset speed condition based on the 100 km / h acceleration start signal; if the engine speed meets the preset speed condition, obtaining the current speed of the engine, and judging whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold; if the difference between the current speed of the engine and the target speed is not greater than the first preset threshold, generating a flag signal to directly control the closing clutch; controlling the engine to start according to the clutch closing signal, so that the engine outputs a driving torque via the clutch. Generating a flag signal to directly control the closing clutch realizes the target speed of the TCU overriding speed control, directly enters the torque control, and thus reduces the speed regulation time.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile control, and in particular relates to a 100 km / h acceleration control method and device for a hybrid electric vehicle. Background Art

[0002] At present, most of the series-parallel hybrid architectures in China are P1+P3 single gear or 2 gears. For the P1+P3 single gear hybrid architecture, the acceleration from 0 to 100 km / h is usually in series mode all the time; for the P1+P3, 2 gear hybrid architecture, when accelerating from 0 to 100 km / h, it is generally in series first and then in parallel. Since the vehicle speed when switching from series mode to parallel mode is relatively high (above 60kph), the engine and P1 motor have enough series speed regulation time, so that after the engine speed approaches the parallel input shaft speed, the clutch is directly locked to enter parallel mode;

[0003] However, for the P1+P3, 3-speed hybrid architecture, the power of the P1 motor is usually small. When accelerating from 0 to 100 km / h, the switching from series to parallel needs to be completed at a lower vehicle speed (around 30 kph) to exert the maximum power of the system. In order to shorten the acceleration time, the engine speed regulation before parallel connection needs to be completed before 30 kph. However, considering the engine start-up time, the existing acceleration control method cannot complete the speed regulation within 30 kph, resulting in too long acceleration time. Summary of the invention

[0004] The present invention provides a 100 km / h acceleration control method, system and vehicle for a hybrid electric vehicle, which are used to solve the technical problem that the speed cannot be adjusted within 30 kph, resulting in an excessively long acceleration time.

[0005] According to an embodiment of the present invention, a 100 km / h acceleration control method for a hybrid vehicle, the hybrid vehicle includes an engine, a motor and a clutch, and the method includes: receiving a 100 km / h acceleration start signal; based on the 100 km / h acceleration start signal, determining whether the engine speed of the hybrid vehicle in a series operating condition meets a preset speed condition; if the engine speed meets the preset speed condition, obtaining the current speed of the engine, and determining whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold; if the difference between the current speed of the engine and the target speed is not greater than the first preset threshold, generating a flag signal to directly control the closing of the clutch, wherein the flag signal is a signal that when the hybrid vehicle switches from a series operating condition to a parallel operating condition, skipping the series-to-parallel speed regulation stage and directly entering the series-to-parallel twisting stage; controlling the engine to start according to the clutch closing signal, so that the engine outputs a driving torque via the clutch.

[0006] In addition, a driving assistance lane changing method according to the above embodiment of the present invention may also have the following additional technical features:

[0007] Further, the determining whether the engine speed of the hybrid vehicle in the series operation condition satisfies a preset speed condition includes: determining whether the engine speed of the hybrid vehicle in the series operation condition is greater than a minimum starting speed.

[0008] Furthermore, after determining whether the engine speed of the hybrid vehicle under the series operating condition is greater than the minimum starting speed, the method also includes: if the engine speed of the hybrid vehicle under the series operating condition is not greater than the minimum starting speed, detecting the available discharge power of the motor; if the available discharge power is not less than a first preset required power, using the motor to adjust the engine speed to the minimum starting speed, wherein the first preset required power is the power required to use the motor to adjust the engine speed to the minimum starting speed.

[0009] Furthermore, after determining whether the difference between the current speed of the engine and the target speed is greater than a preset threshold, the method also includes: if the difference between the current speed of the engine and the target speed is greater than a first preset threshold, controlling the engine to perform a series-to-parallel speed regulation stage to adjust the speed of the engine; determining whether the speed of the engine at a certain moment is greater than a second preset threshold; if the speed of the engine at a certain moment is not greater than the second preset threshold, generating a flag signal to directly control the closing of the clutch.

[0010] Furthermore, the second preset threshold is less than or equal to the first preset threshold, and the first preset threshold is 500 rpm.

[0011] According to an embodiment of the present invention, a 100 km / h acceleration control system of a hybrid vehicle, the hybrid vehicle includes an engine, a motor and a clutch, and the system includes: a receiving module, configured to receive a 100 km / h acceleration start signal; a first judgment module, configured to judge whether the engine speed of the hybrid vehicle in a series working condition meets a preset speed condition based on the 100 km / h acceleration start signal; a second judgment module, configured to obtain the current speed of the engine if the engine speed meets the preset speed condition, and judge whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold; a control module, configured to generate a flag signal to directly control the closing of the clutch if the difference between the current speed of the engine and the target speed is not greater than the first preset threshold, wherein the flag signal is a signal that when the hybrid vehicle switches from the series working condition to the parallel working condition, skips the series-to-parallel speed regulation stage and directly enters the series-to-parallel twisting stage; an output module, configured to control the engine to start according to the clutch closing signal, so that the engine outputs driving torque via the clutch.

[0012] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute the steps of the method for controlling acceleration of a hybrid vehicle to 100 kilometers per hour in any embodiment of the present invention.

[0013] The present invention also provides a vehicle, comprising: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the steps of the 100 km / h acceleration control method for a hybrid vehicle of any embodiment of the present invention.

[0014] The hybrid vehicle's 100 km / h acceleration control method, system and vehicle of the present application, after the difference between the current engine speed and the target speed is no greater than a first preset threshold, generates a flag signal to directly control the closing of the clutch, thereby achieving the target speed of the TCU's overriding speed control, directly entering torque control, reducing the speed regulation time and thus shortening the 100 km / h acceleration time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A flowchart of a 100 km / h acceleration control method for a hybrid vehicle provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of a P1+P3 dual-motor 3-speed hybrid transmission provided by an embodiment of the present invention;

[0018] Figure 3 A diagram of a normal acceleration process of 100 kilometers per hour in series and parallel connection provided by an embodiment of the present invention;

[0019] Figure 4 A diagram of the acceleration process of a 100 km / h vehicle with three series-parallel gears provided in one embodiment of the present invention;

[0020] Figure 5 A structural block diagram of a 100 km / h acceleration control system for a hybrid vehicle provided by an embodiment of the present invention;

[0021] Figure 6 It is a schematic structural diagram of a vehicle provided in one embodiment of the present invention.

[0022] The above drawings include the following reference numerals:

[0023] 1. P1 motor; 2. Engine; 3. P3 motor; 4. Clutch; 5. 2 / 3 gear synchronizer; 6. 1 gear synchronizer; 7. Differential; 8. Dual mass flywheel; 9. High-voltage battery. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1 , which shows a flow chart of a 100 km / h acceleration control method for a hybrid vehicle of the present application.

[0026] like Figure 1 As shown, the 100 km / h acceleration control system of the hybrid vehicle specifically includes the following steps:

[0027] Step S101, receiving a 100 km / h acceleration start signal.

[0028] In this embodiment, the 0-100 km / h acceleration start signal is a starting acceleration signal. The starting acceleration signal is generally obtained by stepping on the accelerator pedal, but it can also be obtained by clicking a physical button that controls the accelerator or touching a virtual button. There is no limitation here.

[0029] As an optional implementation manner, receiving the start acceleration signal includes receiving a hybrid vehicle accelerator pedal opening change signal.

[0030] Step S102, based on the 100 km / h acceleration start signal, determining whether the engine speed of the hybrid vehicle in the series working condition meets a preset speed condition.

[0031] In this embodiment, after obtaining the 100 km / h acceleration start signal, it is necessary to first determine whether the engine speed of the hybrid vehicle in series operation meets the preset speed condition, that is, to determine whether the engine speed of the hybrid vehicle in series operation is greater than the minimum starting speed.

[0032] It should be noted that when the engine speed of the hybrid vehicle in series operation is not greater than the minimum starting speed, the available discharge power of the motor is detected; if the available discharge power is not less than the first preset required power, the motor is used to adjust the engine speed to the minimum starting speed. If the available discharge power is less than the first preset required power, the engine speed is adjusted to the minimum starting speed through the slipping effect of the clutch. The first preset required power is the power required to adjust the engine speed to the minimum starting speed using the motor.

[0033] Specifically, the first preset required power has a corresponding relationship with the minimum starting speed, the throttle opening and the engine resistance torque, and the corresponding relationship is: the greater the minimum starting speed, the throttle opening and the engine resistance torque, the greater the first preset required power. The throttle opening is used to indicate the stepping depth of the accelerator pedal. For example, a 0-100% signal can be used to express the throttle opening, 0 represents no stepping on the accelerator pedal, and 100% represents the maximum stepping on the accelerator pedal.

[0034] The engine resistance torque is used to indicate the torque required to overcome the drag force during engine operation. Specifically, the drag force will cause energy loss, which may include the engine's own friction loss, pumping loss during the intake and exhaust process, irreversible loss of the gas in the engine during the compression and expansion process, and power loss of driving engine accessories.

[0035] The engine resistance torque can be detected by the engine controller and then obtained in the form of a vehicle body CAN signal through the vehicle controller area network (Controller Area Network, CAN).

[0036] Step S103: If the engine speed meets the preset speed condition, the current speed of the engine is obtained, and it is determined whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold.

[0037] In this embodiment, when the engine speed of the hybrid vehicle in series operation is greater than the minimum starting speed, the current engine speed is directly obtained to determine whether the difference between the current speed and the target speed is greater than a first preset threshold.

[0038] It should be noted that the target speed is the target idle speed n 目标怠速转速 , where n 目标怠速转速 =MAX(n 怠速转速 , n 最低转速 ), where n 怠速转速 is the engine idle speed, n 最低转速 It is the minimum speed required for the engine to operate in series.

[0039] Step S104: If the difference between the current speed of the engine and the target speed is not greater than a first preset threshold, a flag signal is generated to directly control closing of the clutch.

[0040] In this embodiment, when the difference between the current engine speed and the target engine speed is not greater than the first preset threshold, the clutch is directly controlled based on the generated flag signal.

[0041] It should be noted that the flag signal is a signal that when the hybrid electric vehicle switches from the series operating condition to the parallel operating condition, it skips the series-to-parallel speed regulation stage and directly enters the series-to-parallel torque recovery stage.

[0042] In an optional implementation, if the difference between the current speed of the engine and the target speed is greater than the first preset threshold, the engine is controlled to perform the series-to-parallel speed regulation stage to adjust the engine speed; it is determined whether the engine speed at a certain moment is greater than the second preset threshold; if the engine speed at a certain moment is not greater than the second preset threshold, a flag signal is generated to directly control the closing of the clutch. This is because a large speed difference between the engine and the clutch can easily lead to a long slipping time of the clutch, which will generate and accumulate too much heat in the clutch, thereby causing the clutch to wear.

[0043] Specifically, the second preset threshold is less than or equal to the first preset threshold, and the first preset threshold is preferably but not limited to 500 rpm.

[0044] By adopting the embodiment of the present invention, it is possible to minimize the time for switching the series speed to the parallel speed while ensuring that the difference between the current speed and the target speed reaches the target value, thereby shortening the acceleration time from 0 to 100 km / h.

[0045] Step S105 , controlling the engine to start according to the clutch closing signal, so that the engine outputs driving torque via the clutch.

[0046] In this embodiment, the engine controller can be used to control the ignition advance angle and inject fuel to start the engine. The present invention does not limit the specific starting method.

[0047] In summary, the method of the present application, during the process of switching a hybrid vehicle from a series operating condition to a parallel operating condition, uses a variety of methods to adjust the engine speed to a point where the difference between the current speed and the target speed is no greater than a first preset threshold, and then generates a flag signal to directly control the closing of the clutch, and then starts the engine, which can achieve the target speed of the TCU's overriding speed control, directly enter torque control, reduce the speed regulation time, and thus shorten the acceleration time from 0 to 100 km / h.

[0048] See also Figure 2 , which shows a schematic structural diagram of the P1+P3 dual-motor 3-speed hybrid transmission of the present application.

[0049] like Figure 2 As shown, the engine is fixedly connected to the P1 motor 1 through a connecting gear, which can realize the functions of P1 motor 1 generating electricity and P1 motor 1 pulling the engine 2. By combining the clutch 4 and the gear synchronizer, the power of the engine 2 can be transmitted to the differential 7, so that the engine can directly drive the vehicle in three gears. Due to the large number of idle gears, it is recommended to match the dual-mass flywheel 8 at the engine output end. The P3 motor 3 transmits the power to the differential 7 through two pairs of gears to realize pure electric drive.

[0050] Introduction to the main operating modes:

[0051] Series drive mode: Engine 2 generates electricity for P1 motor 1, and P3 motor 3 drives;

[0052] Pure electric mode: P3 motor 3 drives the vehicle, while engine 2 and P1 motor 1 do not work.

[0053] Engine starting mode: P1 motor 1 reverses engine 2.

[0054] Parallel drive mode: gear synchronizer is engaged, engine 2 drives, and P3 motor 3 also participates in the drive;

[0055] Parallel power generation mode: gear synchronizer is engaged, engine 2 is driven, and P3 motor 3 is driven to generate electricity at the same time;

[0056] Energy recovery: When the vehicle brakes or coasts to slow down, the P3 motor 3 generates electricity and the engine 2 does not drive.

[0057] When driving in series mode, engine 2 only generates electricity for P1 motor 1, and the whole vehicle is driven only by P3 motor 3. The driving energy of P3 motor 3 comes from the electricity generated by P1 motor 1 or high-voltage battery 9; when driving in parallel mode, the gearbox gear is engaged, engine 2 drives the vehicle, and P3 motor 3 can also drive the vehicle.

[0058] Figure 3 This is a diagram of the normal acceleration process of series-parallel connection from 0 to 100 km / h. When accelerating at full throttle, P1 motor 1 starts engine 2, and engine 2 adjusts the speed to within 50 rpm of the target speed, starts to engage clutch 4, and then enters parallel mode to drive the vehicle together with P3 motor 3.

[0059] Figure 4 This is the acceleration process diagram of 100 kilometers per hour with 3 gears in series and parallel, which is different from the normal acceleration process. Figure 3In comparison, the most important difference is the addition of a HCU_ISGTqhold_Mode (flag for switching from series to parallel and bypassing speed control) signal. When the HCU recognizes the acceleration condition of 100 kilometers, the HCU_ISGT qhold_Mode signal is set to 1. When the TCU receives the signal, it will try to bypass the speed control and directly enter the torque control to engage the clutch 4, and then enter the parallel mode to drive the vehicle together with the P3 motor 3.

[0060] pass Figure 4 and Figure 3 The comparison shows that Figure 4 The control strategy adds an HCU_ISGTqhold_Mode signal, which allows the TCU to override the target speed of the speed control, reduce the speed regulation time, and thus shorten the acceleration time from 0 to 100 km / h.

[0061] See also Figure 5 , which shows a structural block diagram of a 100 km / h acceleration control system of a hybrid vehicle of the present application.

[0062] like Figure 5 As shown, the 100 km / h acceleration control system 200 includes a receiving module 210, a first judgment module 220, a second judgment module 230, a control module 240 and an output module 250.

[0063] Among them, the receiving module 210 is configured to receive a 100 km / h acceleration start signal; the first judgment module 220 is configured to judge whether the engine speed of the hybrid vehicle in the series working condition meets the preset speed condition based on the 100 km / h acceleration start signal; the second judgment module 230 is configured to obtain the current speed of the engine if the engine speed meets the preset speed condition, and judge whether the difference between the current speed of the engine and the target speed is greater than the first preset threshold; the control module 240 is configured to generate a flag signal to directly control the closing of the clutch if the difference between the current speed of the engine and the target speed is not greater than the first preset threshold, wherein the flag signal is a signal that when the hybrid vehicle switches from the series working condition to the parallel working condition, it skips the series-to-parallel speed regulation stage and directly enters the series-to-parallel twisting stage; the output module 250 is configured to control the engine start according to the clutch closing signal, so that the engine outputs driving torque through the clutch.

[0064] It should be understood that Figure 5 Modules and references documented in Figure 1 Therefore, the operations and features described above for the method and the corresponding technical effects are also applicable to Figure 5 The modules in it will not be described in detail here.

[0065] In other embodiments, the present invention also provides a non-volatile computer storage medium, the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the 100 km / h acceleration control method of a hybrid vehicle in any of the above method embodiments;

[0066] As an implementation mode, the non-volatile computer storage medium of the present invention stores computer executable instructions, and the computer executable instructions are configured as follows:

[0067] Receive 100km / h acceleration start signal;

[0068] Based on the 100 km / h acceleration start signal, determining whether the engine speed of the hybrid vehicle in a series operation condition meets a preset speed condition;

[0069] If the engine speed meets the preset speed condition, the current speed of the engine is obtained, and it is determined whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold;

[0070] If the difference between the current speed of the engine and the target speed is not greater than a first preset threshold, a flag signal is generated to directly control the closing of the clutch, wherein the flag signal is a signal for directly entering the series-to-parallel-to-torque-back stage by skipping the series-to-parallel speed regulation stage when the hybrid electric vehicle switches from the series operating state to the parallel operating state;

[0071] The engine is started and controlled according to the clutch closing signal, so that the engine outputs driving torque via the clutch.

[0072] The non-volatile computer-readable storage medium may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the 100 km / h acceleration control system of the hybrid vehicle, etc. In addition, the non-volatile computer-readable storage medium may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the non-volatile computer-readable storage medium may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the 100 km / h acceleration control system of the hybrid vehicle via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0073] An embodiment of the present invention also provides a computer program product, which includes a computer program stored on a non-volatile computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes any one of the above-mentioned hybrid electric vehicle 0-100 km / h acceleration control methods.

[0074] Figure 6 is a schematic diagram of the structure of a vehicle provided by an embodiment of the present invention, such as Figure 6 As shown, the vehicle includes: one or more processors 310 and a memory 320, Figure 6 A processor 310 is taken as an example. The vehicle of the 100 km / h acceleration control method of a hybrid vehicle may further include: an input device 330 and an output device 330. The processor 310, the memory 320, the input device 330 and the output device 330 may be connected via a bus or other means. Figure 6 The example of connecting via a bus is taken. The memory 320 is the above-mentioned non-volatile computer-readable storage medium. The processor 310 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 320, that is, the 100 km / h acceleration control method of the hybrid vehicle in the above-mentioned embodiment is realized. The input device 330 can receive input digital or character information, and generate key signal input related to user settings and function control of the 100 km / h acceleration control system of the hybrid vehicle. The output device 330 may include display devices such as display screens.

[0075] The above product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0076] As an embodiment, a vehicle includes: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to:

[0077] Receive 100km / h acceleration start signal;

[0078] Based on the 100 km / h acceleration start signal, determining whether the engine speed of the hybrid vehicle in a series operation condition meets a preset speed condition;

[0079] If the engine speed meets the preset speed condition, the current speed of the engine is obtained, and it is determined whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold;

[0080] If the difference between the current speed of the engine and the target speed is not greater than a first preset threshold, a flag signal is generated to directly control the closing of the clutch, wherein the flag signal is a signal for directly entering the series-to-parallel-to-torque-back stage by skipping the series-to-parallel speed regulation stage when the hybrid electric vehicle switches from the series operating state to the parallel operating state;

[0081] The engine is started and controlled according to the clutch closing signal, so that the engine outputs driving torque via the clutch.

[0082] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0083] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0084] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for controlling 0-100km / h acceleration of a hybrid electric vehicle, the hybrid electric vehicle comprising an engine, a motor and a clutch, characterized in that: The method comprises: Receive 100km / h acceleration start signal; Based on the 100 km / h acceleration start signal, determining whether the engine speed of the hybrid vehicle in a series operation condition meets a preset speed condition; If the engine speed meets the preset speed condition, the current speed of the engine is obtained, and it is determined whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold, including: The target speed is the target idle speed n 目标怠速转速 , where n 目标怠速转速 =MAX(n 怠速转速 , n 最低转速 ), where n 怠速转速 is the engine idle speed, n 最低转速 It is the minimum speed required for the engine in series operation; If the difference between the current speed of the engine and the target speed is not greater than a first preset threshold, a flag signal is generated to directly control the closing of the clutch, wherein the flag signal is a signal for directly entering the series-to-parallel-to-torque-back stage by skipping the series-to-parallel speed regulation stage when the hybrid electric vehicle switches from the series operating state to the parallel operating state; The engine is started and controlled according to the clutch closing signal, so that the engine outputs driving torque via the clutch.

2. The method for controlling the acceleration of a hybrid vehicle from 0 to 100 km / h according to claim 1, characterized in that: The step of judging whether the engine speed of the hybrid vehicle in the series operation state meets the preset speed condition includes: Determine whether the engine speed of a hybrid vehicle in series operation is greater than the minimum starting speed.

3. The method for controlling the acceleration of a hybrid vehicle from 0 to 100 km / h according to claim 2, characterized in that: After determining whether the engine speed of the hybrid vehicle in the series operation state is greater than the minimum starting speed, the method further includes: When the engine speed of the hybrid vehicle in series operation is not greater than the minimum starting speed, the available discharge power of the motor is detected; If the available discharge power is not less than the first preset required power, the motor is used to adjust the engine speed to the minimum starting speed, wherein the first preset required power is the power required to adjust the engine speed to the minimum starting speed using the motor.

4. The method for controlling the acceleration of a hybrid vehicle from 0 to 100 km / h according to claim 1, characterized in that: After determining whether the difference between the current speed of the engine and the target speed is greater than a preset threshold, the method further includes: If the difference between the current speed of the engine and the target speed is greater than a first preset threshold, the engine is controlled to perform a series-to-parallel speed regulation stage to adjust the speed of the engine; Determining whether the speed of the engine at a certain moment is greater than a second preset threshold; If the rotation speed of the engine at a certain moment is not greater than a second preset threshold, a flag signal is generated to directly control closing of the clutch.

5. The method for controlling the acceleration of a hybrid vehicle from 0 to 100 km / h according to claim 4, characterized in that: The second preset threshold is less than or equal to the first preset threshold, and the first preset threshold is 500 rpm.

6. A 100 km / h acceleration control system for a hybrid electric vehicle, the system being used to execute the 100 km / h acceleration control method for a hybrid electric vehicle according to any one of claims 1 to 5, the hybrid electric vehicle comprising an engine, a motor and a clutch, characterized in that: The system comprises: A receiving module, configured to receive a 100 km / h acceleration start signal; A first judgment module is configured to judge whether the engine speed of the hybrid vehicle in a series working condition meets a preset speed condition based on the 100 km / h acceleration start signal; The second judgment module is configured to obtain the current speed of the engine if the engine speed meets the preset speed condition, and judge whether the difference between the current speed of the engine and the target speed is greater than a first preset threshold, including: The target speed is the target idle speed n 目标怠速转速 , where n 目标怠速转速 =MAX(n 怠速转速 , n 最低转速 ), where n 怠速转速 is the engine idle speed, n 最低转速 It is the minimum speed required for the engine in series operation; The control module is configured to generate a flag signal to directly control the clutch to close if the difference between the current speed of the engine and the target speed is not greater than a first preset threshold, wherein the flag signal is a signal for directly entering the series-to-parallel-to-torque-back stage by skipping the series-to-parallel speed regulation stage when the hybrid electric vehicle switches from the series operating condition to the parallel operating condition; The output module is configured to control the engine to start according to the clutch closing signal, so that the engine outputs driving torque via the clutch.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

8. A vehicle, characterized in that: include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in any one of claims 1 to 5.

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