Control method and device for series-parallel connection of hybrid vehicle, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a hybrid vehicle series-parallel connection control method and device, electronic equipment and a storage medium, and relates to the technical field of three-electric control of new energy vehicles. Obtaining calculation data used for calculating the minimum torque required by a range extender when the hybrid power vehicle performs parallel switching, and determining the minimum torque based on the calculation data; and if the to-be-distributed torque of the range extender is not smaller than the minimum torque, parallel switching is conducted on the operation mode. According to the embodiment of the invention, the problem of abrasion of the one-way clutch caused by reverse slip in a traditional control strategy is solved, effective transmission of the torque of the one-way clutch is ensured by optimizing the switching time of the operation mode, and the safety and economical efficiency of the vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the field of three-electric control of new energy vehicles, and specifically relates to a control method for series-parallel connection of hybrid vehicles, a control device for series-parallel connection of hybrid vehicles, an electronic device, and a computer-readable storage medium. Background Art

[0002] Due to its advantages of simple structure, low cost, and high transmission efficiency, the one-way clutch is widely used in the connection between the range extender and the transmission system. However, when a hybrid vehicle is running in a parallel condition, if the rotational speed of the active end of the one-way clutch is lower than that of the driven end, the torque of the active end cannot be effectively transmitted, resulting in the driver's driving demand not being met, that is, the reverse slip phenomenon (i.e., negative slip) occurs. The reverse slip phenomenon not only causes the power of the range extender to be unable to be effectively transmitted, but also generates a drag torque. At the same time, due to the deterioration of lubrication conditions, the wear of the clutch and bearings is aggravated, seriously affecting the reliability and service life of the transmission system.

[0003] Under the framework of the prior art, although torque distribution strategies are adopted to optimize power transmission in the parallel condition, there are still control blind spots in dynamic conditions: when the output torque distribution value of the range extender (APU, composed of an engine and a generator) is lower than the critical demand, the one-way clutch will be forced into the reverse slip state. For example, in low-target-torque cruising or light-load conditions, the target output torque of the range extender is small, which is likely to cause reverse slip; in extreme conditions such as large vehicle acceleration when going downhill with a large throttle, it may cause dynamic mismatch between the angular accelerations of the active end and the driven end, and the difference between the engine speed and the drive wheel speed expands rapidly, making it impossible to ensure that the rotational speed of the range extender is continuously higher than the reference value of the driven end, ultimately triggering the reverse slip phenomenon. This phenomenon leads to the driver's demand not being met and increased mechanical losses, directly affecting the service life of the transmission system and the driving experience. Although a two-way clutch can avoid reverse slip, its cost is high, its structure is complex, and its economy is far inferior to that of a one-way clutch.

[0004] Therefore, the reverse slip phenomenon of the one-way clutch in dynamic conditions has become an urgent problem to be solved at present. Summary of the Invention

[0005] In view of the above problems, embodiments of the present invention are proposed to provide a control method for series-parallel connection of hybrid vehicles, a control device for series-parallel connection of hybrid vehicles, an electronic device, and a computer-readable storage medium that overcome the above problems or at least partially solve the above problems.

[0006] In a first aspect, embodiments of the present invention disclose a control method for series-parallel connection of hybrid vehicles, including:

[0007] When triggering a parallel switch of the operating mode of a hybrid vehicle, obtain calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle performs a parallel switch;

[0008] Determine the minimum torque based on the calculation data;

[0009] If the torque to be allocated to the range extender is not less than the minimum torque, perform a parallel switch of the operating mode.

[0010] Optionally, the determining the minimum torque based on the calculation data includes:

[0011] Determine the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and the current slope angle of the hybrid vehicle;

[0012] Determine the current maximum angular acceleration at the drive motor end in the hybrid vehicle based on the current maximum linear acceleration and the tire radius of the hybrid vehicle;

[0013] Determine the minimum torque based on the current maximum angular acceleration and the equivalent moment of inertia of the range extender.

[0014] Optionally, it further includes:

[0015] When triggering a series switch of the operating mode, perform a series switch of the operating mode.

[0016] Optionally, triggering a parallel switch of the operating mode of a hybrid vehicle includes:

[0017] When the operating mode is in series, determine whether a parallel switch request is obtained;

[0018] If the parallel switch request is obtained, trigger a parallel switch of the operating mode of the hybrid vehicle.

[0019] Optionally, before triggering a parallel switch of the operating mode of a hybrid vehicle, it further includes:

[0020] When the hybrid vehicle starts, set the operating mode to series;

[0021] Determine whether to trigger a parallel switch of the operating mode;

[0022] When not triggering a parallel switch of the operating mode, perform the determination of whether to trigger a parallel switch of the operating mode.

[0023] Optionally, the determining the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and the current slope angle of the hybrid vehicle includes:

[0024] The current maximum linear acceleration corresponding to the current throttle pedal opening and the current slope angle is calculated by using a linear interpolation algorithm through a two-dimensional mapping table.

[0025] Optionally, triggering a series switch of the operation mode includes:

[0026] When the operation mode is in parallel, determining whether the time period during which the torque to be allocated to the range extender continuously is less than the minimum torque exceeds a time period threshold;

[0027] If the time period during which the torque to be allocated to the range extender continuously is less than the minimum torque exceeds the time period threshold, triggering a series switch of the operation mode.

[0028] In a second aspect, an embodiment of the present invention discloses a control device for a series-parallel hybrid vehicle, including:

[0029] An acquisition module, configured to acquire calculation data for calculating the minimum torque required by the range extender when a parallel switch of the operation mode of the hybrid vehicle is triggered;

[0030] A calculation module, configured to determine the minimum torque based on the calculation data;

[0031] A switching module, configured to perform a parallel switch of the operation mode if the torque to be allocated to the range extender is not less than the minimum torque.

[0032] Optionally, the calculation module includes:

[0033] A first calculation sub-module, configured to determine the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and the current slope angle of the hybrid vehicle;

[0034] A second calculation sub-module, configured to determine the current maximum angular acceleration at the drive motor end of the hybrid vehicle based on the current maximum linear acceleration and the tire radius of the hybrid vehicle;

[0035] A third calculation sub-module, configured to determine the minimum torque based on the current maximum angular acceleration and the equivalent moment of inertia of the range extender.

[0036] Optionally, the switching module is further configured to:

[0037] When a series switch of the operation mode is triggered, perform a series switch of the operation mode.

[0038] Optionally, it further includes a first determination module, specifically configured to:

[0039] When the operating mode is in series, determine whether a parallel switching request is obtained;

[0040] If the parallel switching request is obtained, trigger a parallel switching of the operating mode of the hybrid vehicle.

[0041] Optionally, it further includes:

[0042] A setting module, configured to set the operating mode to series when the hybrid vehicle starts before triggering a parallel switching of the operating mode of the hybrid vehicle;

[0043] A second determination module, configured to determine whether to trigger a parallel switching of the operating mode;

[0044] When the parallel switching of the operating mode is not triggered, call the second determination module.

[0045] Optionally, the first calculation sub-module is specifically configured to:

[0046] Calculate the current maximum linear acceleration corresponding to the current throttle pedal opening and the current slope angle through a two-dimensional mapping table using a linear interpolation algorithm.

[0047] Optionally, it further includes a third determination module, specifically configured to:

[0048] When the operating mode is in parallel, determine whether the period during which the torque to be allocated to the range extender continuously is less than the minimum torque exceeds a period threshold;

[0049] If the period during which the torque to be allocated to the range extender continuously is less than the minimum torque exceeds the period threshold, trigger a series switching of the operating mode.

[0050] In a third aspect, the present invention discloses an electronic device, including: a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, the steps of the above control method for series-parallel of a hybrid vehicle are implemented.

[0051] In a fourth aspect, the present invention discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above control method for series-parallel of a hybrid vehicle are implemented.

[0052] The embodiments of the present invention include the following advantages:

[0053] When triggering a parallel switch for the operation mode of a hybrid vehicle, calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle performs a parallel switch is obtained, and the minimum torque is determined based on the calculation data; if the torque to be allocated to the range extender is not less than the minimum torque, the operation mode is switched in parallel. In the above manner, when the system determines that a parallel switch has been triggered, the operation mode is not immediately switched to parallel. Instead, it first determines whether the conditions for parallel switching are met, and only performs a parallel switch when the conditions are met, thus avoiding damage caused by reverse slip of the one-way clutch after parallel switching. In this way, not only does it solve the problem of reverse slip causing wear of the one-way clutch in traditional control strategies, but it also ensures the effective transmission of the torque of the one-way clutch by optimizing the switching timing of the operation mode, improving the safety and economy of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 is the step flow of a control method for series-parallel operation of a hybrid vehicle provided by an embodiment of the present invention Figure 1 ;

[0055] Figure 2 is a schematic diagram of the model of the powertrain system of the hybrid vehicle in the present invention;

[0056] Figure 3 is the step flow of a control method for series-parallel operation of a hybrid vehicle provided by an embodiment of the present invention Figure 2 ;

[0057] Figure 4 is the structural block diagram of a control device for series-parallel operation of a hybrid vehicle provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention and not for limiting the protection scope of the present invention.

[0059] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention schematically. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0060] Such asFigure 1 As shown in the figure, this embodiment proposes a control method for the series-parallel connection of a hybrid vehicle, which can be applied to the system of a hybrid vehicle. Among them, a hybrid vehicle is a vehicle driven by a hybrid power. Generally, the hybrid power refers to the hybrid of fuel (such as gasoline, diesel, etc.) and electric energy. A hybrid vehicle is driven by an electric motor as an auxiliary power of the engine. The advantage is that when the electric energy is sufficient, the start and stop of the vehicle are driven by the motor. When a certain speed is reached, the engine can work. Therefore, the engine can always be kept in the best working condition, with good power performance and very low emissions. A hybrid vehicle can be provided with a range extender. Generally, a range extender refers to a vehicle component that can provide additional electric energy, so that the vehicle can increase its driving range. For example, when the electric energy is insufficient, other energy sources (such as gasoline) are used for electric energy replenishment. In the traditional sense, a range extender refers to the combination of an engine and a generator.

[0061] As Figure 2 shown in the figure, a schematic model diagram of the transmission system of a hybrid vehicle is shown. Among them, K3 represents a one-way clutch. The left end of the one-way clutch is a range extender, and J e represents the equivalent moment of inertia of the range extender, ω e represents the angular acceleration of the range extender, and T min is the minimum torque required for the range extender to prevent reverse slip of the one-way clutch. The right end of the K3 clutch is the drive motor end, and ω c represents the angular acceleration of the drive motor end.

[0062] Furthermore, a hybrid vehicle can include two operating modes: series and parallel.

[0063] In the series operating mode, the range extender is decoupled from the drive system. At this time, the one-way clutch is in a free state, and it continuously determines whether a parallel switch is needed to ensure the charge and discharge balance of the power battery, and at the same time, optimize the operating efficiency of the range extender.

[0064] In the parallel operating mode, the range extender is coupled with the drive system. At this time, the one-way clutch is in a working state, and it continuously determines the actual output torque of the range extender. When the actual output torque continuously does not meet the minimum torque requirement, a series switch can be automatically performed to avoid damage to the one-way clutch due to long-term reverse slip through this protection mechanism.

[0065] According to the connection method of hybrid drive, hybrid systems are mainly divided into the following three categories:

[0066] Furthermore, the method can specifically include:

[0067] Step 101, when triggering a parallel switch of the operating mode of a hybrid vehicle, obtain calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle performs a parallel switch.

[0068] When the hybrid vehicle is in an operating state, the system can determine the operating mode of the vehicle in real time. In the case of determining that a parallel switch of the vehicle's operating mode is triggered, the system can obtain data for calculating the minimum torque (for the sake of distinction, denoted as "calculation data"). Among them, the minimum torque is the lower limit of the torque required by the range extender to prevent reverse slip of the one-way clutch when performing a parallel switch. That is to say, when the system determines that a parallel switch is triggered, it will not immediately switch the operating mode to parallel, but first determine whether the conditions for parallel switching are met, and only perform a parallel switch when the conditions are met, thus avoiding damage caused by reverse slip of the one-way clutch after parallel switching.

[0069] It should be noted that the system can obtain the calculation data through real-time acquisition. For example, it can be acquired in real time through various sensors in the vehicle. Of course, the calculation data can also be obtained through other means. In practical applications, the specific method of obtaining the calculation data can be set according to the actual situation, and this embodiment does not limit this.

[0070] Furthermore, when the hybrid vehicle is in an operating state, the vehicle can be in a moving state or a stationary state. That is to say, the vehicle can be in an operating state after starting. This embodiment does not limit the specific form of the operating state.

[0071] In this embodiment, triggering a parallel switch of the operating mode of a hybrid vehicle includes:

[0072] When the operating mode is series, determine whether a parallel switch request is obtained;

[0073] If the parallel switch request is obtained, trigger a parallel switch of the operating mode of the hybrid vehicle.

[0074] Specifically, when the system determines the operating mode of the vehicle in real time, it can also determine whether a parallel switch request is obtained. If, when determining that the current operating mode of the vehicle is series, a parallel switch request is also obtained, then a parallel switch of the vehicle's operating mode is triggered.

[0075] It should be noted that the parallel switch request can be initiated by the user, the vehicle itself, or other objects. In practical applications, the initiating object of the parallel switch request can be adjusted according to actual needs, and this embodiment does not limit this.

[0076] Step 102: Determine the minimum torque based on the calculated data.

[0077] After the system obtains the calculated data, it can calculate the minimum torque required by the range extender using the calculated data. Among them, the calculated data may include the throttle pedal opening, slope angle, tire radius, and equivalent moment of inertia of the range extender.

[0078] It should be noted that in addition to the above data, the calculated data may also include other data. In practical applications, the specific data included in the calculated data can be adjusted according to actual needs, and this embodiment does not limit this.

[0079] In this embodiment, the determining the minimum torque based on the calculated data includes:

[0080] Determine the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and current slope angle of the hybrid vehicle;

[0081] Determine the current maximum angular acceleration at the drive motor end in the hybrid vehicle based on the current maximum linear acceleration and the tire radius of the hybrid vehicle;

[0082] Determine the minimum torque based on the current maximum angular acceleration and the equivalent moment of inertia of the range extender.

[0083] Specifically, according to the obtained throttle pedal opening at the current moment of the vehicle (denoted as "current throttle pedal opening") and the slope angle at the current moment (denoted as "current slope angle"), the maximum linear acceleration a of the vehicle at the current moment is obtained by querying through a preset two-dimensional mapping table max (denoted as "current maximum linear acceleration").

[0084] In this embodiment, the determining the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and current slope angle of the hybrid vehicle includes:

[0085] Calculate the current maximum linear acceleration corresponding to the current throttle pedal opening and the current slope angle through a two-dimensional mapping table using a linear interpolation algorithm.

[0086] Specifically, the preset two-dimensional mapping table can be generated by experimental calibration, can also be constructed by simulation modeling, or can be generated by other means. In practical applications, the specific generation method of the two-dimensional mapping table can be set according to actual needs, and this embodiment does not limit this.

[0087] In a two-dimensional mapping table, the horizontal axis represents the throttle pedal opening, and the vertical axis represents the slope angle of the road. Each intersection point in the two-dimensional mapping table is the maximum linear acceleration corresponding to the throttle pedal opening and the slope angle. Based on this, after obtaining the current throttle pedal opening and the current slope angle, using the current throttle pedal opening and the current slope angle as inputs, the corresponding current maximum linear acceleration is calculated in real time using a linear interpolation algorithm.

[0088] After obtaining the current maximum linear acceleration, by dividing the current maximum linear acceleration by the tire radius, the maximum angular acceleration (denoted as "current maximum angular acceleration") at the drive motor end of the vehicle at the current moment can be determined. In this way, through physical relationship conversion, the linear acceleration is converted into the maximum angular acceleration at the drive motor end.

[0089] Specifically, the angular acceleration ω c of the drive motor end max and the maximum linear acceleration a

[0090]

[0091] are related as follows:

[0092] where r is the tire radius. The tire radius can be called in real time according to the vehicle configuration information, and moreover, the data accuracy can be ensured through dynamic calibration. e ≥ω c , that is:

[0093]

[0094] where ω e is the maximum angular acceleration of the range extender at the current moment (denoted as "current maximum angular acceleration").

[0095] After obtaining the current maximum angular acceleration of the range extender, combined with the equivalent moment of inertia of the range extender, the minimum torque required by the range extender can be calculated according to the law of rotation. Specifically, according to the law of rotation T = J * ω (J is the equivalent moment of inertia), the minimum torque required by the range extender needs to satisfy the following formula:

[0096]

[0097] where T min is the minimum torque required by the range extender to prevent reverse slip of the one-way clutch, J e is the equivalent moment of inertia of the range extender, and i is the transmission ratio between the wheel end and the drive motor end.

[0098] Therefore, the minimum torque required by the range extender can be expressed as:

[0099]

[0100] It should be noted that the equivalent moment of inertia can be determined by the way of the range extender design parameters, or by real-time measurement, or by other ways. In actual applications, the specific determination method of the equivalent moment of inertia of the range extender can be set according to actual requirements, and this embodiment does not limit this.

[0101] In this way, the minimum torque required by the range extender is calculated by multiplying the equivalent moment of inertia of the range extender by the current maximum angular acceleration of the range extender, ensuring that the torque output by the range extender is sufficient to avoid the reverse slip phenomenon caused by insufficient torque during the power transmission process. Moreover, by combining the dynamic query of the two-dimensional mapping table with the physical model, the precise control of the vehicle during the parallel switch is realized, the reverse slip under complex working conditions is suppressed, and the driving stability and energy efficiency are improved.

[0102] Step 103, if the torque to be allocated to the range extender is not less than the minimum torque, perform a parallel switch on the operation mode.

[0103] Specifically, after calculating the minimum torque required by the range extender, the output torque planned to be allocated to the range extender (denoted as "the torque to be allocated to the range extender") can be compared and verified with the minimum torque. If the torque to be allocated to the range extender is not less than the minimum torque, then the parallel switch can be immediately executed. In this way, the range extender is coupled with the drive system cabinet through a one-way clutch to jointly drive the vehicle.

[0104] In this embodiment, when triggering a parallel switch on the operation mode of the hybrid vehicle, obtain the calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle performs a parallel switch, and determine the minimum torque based on the calculation data; if the torque to be allocated to the range extender is not less than the minimum torque, perform a parallel switch on the operation mode. By the above method, when the system determines that the parallel switch is triggered, the operation mode will not be immediately switched to parallel. Instead, it first determines whether the conditions for the parallel switch are met, and only performs the parallel switch when the conditions are met, thus avoiding the damage caused by the reverse slip of the one-way clutch after the parallel switch. In this way, not only the problem of reverse slip causing wear of the one-way clutch in the traditional control strategy is solved, but also the effective transmission of the torque of the one-way clutch is ensured by optimizing the switching timing of the operation mode, improving the safety and economy of the vehicle.

[0105] As Figure 3 shown, this embodiment proposes another control method for the series-parallel hybrid vehicle, which specifically may include:

[0106] Step 301: When the hybrid vehicle starts, set the operation mode to series.

[0107] Step 302: Determine whether a parallel switch of the operation mode is triggered.

[0108] Step 303: When a parallel switch of the operation mode is not triggered, determine whether a parallel switch of the operation mode is triggered.

[0109] Specifically, when the system determines that the vehicle starts, the operation mode of the vehicle can be directly set to series. In the series operation mode, the range extender is decoupled from the drive system. At this time, the one-way clutch is in a free state, and it continuously determines whether a parallel switch is required, so as to ensure the charge and discharge balance of the power battery and optimize the operation efficiency of the range extender at the same time.

[0110] After the operation mode is set to series, it can be determined in real time whether a parallel switch of the operation mode is triggered. If it is determined that a parallel switch of the operation mode is triggered, then step 304 can be executed; if it is determined that a parallel switch of the operation mode is not triggered, then step 302 can be continued, thus realizing continuous real-time determination of whether a parallel switch of the operation mode is triggered.

[0111] Step 304: When a parallel switch of the operation mode of the hybrid vehicle is triggered, obtain the calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle makes a parallel switch.

[0112] Step 305: Determine the minimum torque based on the calculation data.

[0113] Step 306: If the torque to be allocated to the range extender is not less than the minimum torque, perform a parallel switch of the operation mode.

[0114] Among them, steps 304 to 306 are substantially the same as steps 101 to 103. To avoid repetition, they will not be elaborated here.

[0115] Step 307: When a series switch of the operation mode is triggered, perform a series switch of the operation mode.

[0116] After the operation mode of the vehicle is switched to parallel, the system can continuously determine whether a series switch of the operation mode is triggered. If it is determined that a series switch of the operation mode is triggered, then the operation mode can be switched from parallel to series.

[0117] In this embodiment, triggering a series switch of the operation mode includes:

[0118] When the operating mode is parallel, determine whether the period during which the torque to be allocated by the range extender is continuously less than the minimum torque exceeds a period threshold;

[0119] If the period during which the torque to be allocated by the range extender is continuously less than the minimum torque exceeds the period threshold, trigger a series switch for the operating mode.

[0120] Specifically, after the operating mode is successfully switched to parallel, the system can continuously determine whether the torque to be allocated by the range extender is not less than the minimum torque. If the period during which the torque to be allocated by the range extender is continuously less than the minimum torque exceeds the period threshold, then it can be determined that a series switch for the operating mode is triggered. For example, if the torque to be allocated by the range extender is continuously less than the minimum torque for 1 minute, then it can be determined that a series switch for the operating mode is triggered, thereby switching the operating mode of the vehicle from parallel to series. In this way, in the case where the torque to be allocated by the range extender continuously fails to meet the minimum torque, the system can automatically switch back from the parallel operating mode to the series operating mode, thereby avoiding damage to the one-way clutch due to long-term reverse slip difference through this protection mechanism.

[0121] In this embodiment, when the hybrid vehicle starts, the operating mode is set to series, and then it is determined whether to trigger a parallel switch for the operating mode. When no parallel switch for the operating mode is triggered, determine whether to trigger a parallel switch for the operating mode. In the series operating mode, the range extender is decoupled from the drive system. At this time, the one-way clutch is in a free state, and it is continuously determined whether a parallel switch is needed, so as to ensure the charge and discharge balance of the power battery and optimize the operating efficiency of the range extender.

[0122] When a parallel switch for the operating mode of the hybrid vehicle is triggered, obtain the calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle makes a parallel switch, and determine the minimum torque based on the calculation data. If the torque to be allocated by the range extender is not less than the minimum torque, perform a parallel switch for the operating mode. After the switch is completed, when a series switch for the operating mode is triggered, perform a series switch for the operating mode. In this way, in the case where the torque to be allocated by the range extender continuously fails to meet the minimum torque, the system can automatically switch back from the parallel operating mode to the series operating mode, thereby avoiding damage to the one-way clutch due to long-term reverse slip difference through this protection mechanism.

[0123] Refer to Figure 4 , which shows a structural block diagram of a control device for series-parallel of a hybrid vehicle provided by an embodiment of the present invention. The device includes:

[0124] An acquisition module 401, configured to acquire calculation data for calculating the minimum torque required by the range extender when the parallel switch of the operation mode of the hybrid vehicle is triggered;

[0125] A calculation module 402, configured to determine the minimum torque based on the calculation data;

[0126] A switching module 403, configured to perform a parallel switch on the operation mode if the torque to be allocated to the range extender is not less than the minimum torque.

[0127] In this embodiment, the calculation module includes:

[0128] A first calculation sub-module, configured to determine the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and the current slope angle of the hybrid vehicle;

[0129] A second calculation sub-module, configured to determine the current maximum angular acceleration at the drive motor end of the hybrid vehicle based on the current maximum linear acceleration and the tire radius of the hybrid vehicle;

[0130] A third calculation sub-module, configured to determine the minimum torque based on the current maximum angular acceleration and the equivalent moment of inertia of the range extender.

[0131] In this embodiment, the switching module is further configured to:

[0132] When a series switch of the operation mode is triggered, perform a series switch on the operation mode.

[0133] In this embodiment, a first determination module is further included, specifically configured to:

[0134] When the operation mode is in series, determine whether a parallel switch request is obtained;

[0135] If the parallel switch request is obtained, trigger a parallel switch on the operation mode of the hybrid vehicle.

[0136] In this embodiment, the following are further included:

[0137] A setting module, configured to set the operation mode to series when the hybrid vehicle starts before triggering a parallel switch on the operation mode of the hybrid vehicle;

[0138] A second determination module, configured to determine whether to trigger a parallel switch on the operation mode;

[0139] When a parallel switch on the operation mode is not triggered, call the second determination module.

[0140] In this embodiment, the first calculation sub-module is specifically configured to:

[0141] Calculate the current maximum linear acceleration corresponding to the current throttle pedal opening and the current slope angle through a two-dimensional mapping table by using a linear interpolation algorithm.

[0142] In this embodiment, it further includes a third determination module, which is specifically configured to:

[0143] When the operation mode is parallel, determine whether the time period during which the torque to be allocated to the range extender continuously is less than the minimum torque exceeds a time period threshold;

[0144] If the time period during which the torque to be allocated to the range extender continuously is less than the minimum torque exceeds the time period threshold, trigger a series switch for the operation mode.

[0145] For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For the related parts, refer to the partial description of the method embodiment.

[0146] The embodiment of the present invention further provides an electronic device, including:

[0147] It includes a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, it realizes each process of the above-mentioned control method embodiment of the hybrid vehicle series-parallel connection, and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0148] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor, it realizes each process of the above-mentioned control method embodiment of the hybrid vehicle series-parallel connection, and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0149] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, refer to each other.

[0150] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a device, or a computer program product. Therefore, the embodiments of the present invention can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present invention can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0151] Embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate means for realizing the functions specified in one or more flows and / or one or more blocks in the flow Figure 1 one or more flows and / or blocks Figure 1 or the functions of the specified means in a plurality of blocks.

[0152] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means realizes the functions specified in one or more flows and / or one or more blocks in the flow Figure 1 one or more flows and / or blocks Figure 1 or the functions of the specified means in a plurality of blocks.

[0153] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable terminal device provide steps for realizing the functions specified in one or more flows and / or one or more blocks in the flow Figure 1 one or more flows and / or blocks Figure 1 or the functions of the specified means in a plurality of blocks.

[0154] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0155] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0156] The above has introduced in detail a control method for a series-parallel hybrid vehicle, a control device for a series-parallel hybrid vehicle, an electronic device and a computer-readable storage medium provided by the present invention. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A control method for series-parallel hybrid vehicles, characterized in that, Including: When triggering a parallel switch of the operating mode of a hybrid vehicle, obtaining calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle performs a parallel switch; Determining the minimum torque based on the calculation data; If the torque to be allocated to the range extender is not less than the minimum torque, performing a parallel switch on the operating mode.

2. The hybrid vehicle series-parallel control method according to claim 1, characterized in that: The determining the minimum torque based on the calculation data includes: Determining the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and the current slope angle of the hybrid vehicle; Determining the current maximum angular acceleration at the drive motor end of the hybrid vehicle based on the current maximum linear acceleration and the tire radius of the hybrid vehicle; Determining the minimum torque based on the current maximum angular acceleration and the equivalent moment of inertia of the range extender.

3. The control method for series-parallel hybrid vehicles according to claim 1, characterized in that Also including: When triggering a series switch of the operating mode, performing a series switch on the operating mode.

4. The control method for series-parallel hybrid vehicles according to claim 1, characterized in that, Triggering a parallel switch of the operating mode of a hybrid vehicle includes: When the operating mode is in series, determining whether a parallel switch request is obtained; If the parallel switch request is obtained, triggering a parallel switch of the operating mode of the hybrid vehicle.

5. The control method for the series-parallel hybrid vehicle according to claim 1, wherein Before triggering a parallel switch of the operating mode of a hybrid vehicle, it also includes: When the hybrid vehicle starts, setting the operating mode to series; Determining whether to trigger a parallel switch of the operating mode; When not triggering a parallel switch of the operating mode, performing the determination of whether to trigger a parallel switch of the operating mode.

6. The control method for series-parallel hybrid vehicles according to claim 2, wherein The determining the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and the current slope angle of the hybrid vehicle includes: Calculating, by using a linear interpolation algorithm through a two-dimensional mapping table, the current maximum linear acceleration corresponding to the current throttle pedal opening and the current slope angle.

7. The control method for series-parallel hybrid vehicles according to claim 3, characterized in that Triggering a series switch of the operating mode includes: When the operating mode is in parallel, determining whether the time period during which the torque to be allocated to the range extender is continuously less than the minimum torque exceeds a time period threshold; If the time period during which the torque to be allocated to the range extender is continuously less than the minimum torque exceeds the time period threshold, triggering a series switch of the operating mode.

8. A control device for series-parallel hybrid vehicles, characterized in that, Including: An acquisition module, configured to, when triggering a parallel switch of the operating mode of a hybrid vehicle, obtain calculation data for calculating the minimum torque required by the range extender when the hybrid vehicle performs a parallel switch; A calculation module, configured to determine the minimum torque based on the calculation data; A switching module, configured to, if the torque to be allocated to the range extender is not less than the minimum torque, perform a parallel switch on the operating mode.

9. The control device for the series-parallel hybrid vehicle according to claim 8, wherein The calculation module includes: A first calculation sub-module, configured to determine the current maximum linear acceleration of the hybrid vehicle based on the current throttle pedal opening and the current slope angle of the hybrid vehicle; A second calculation sub-module, configured to determine the current maximum angular acceleration at the drive motor end of the hybrid vehicle based on the current maximum linear acceleration and the tire radius of the hybrid vehicle; A third calculation sub-module, configured to determine the minimum torque based on the current maximum angular acceleration and the equivalent moment of inertia of the range extender.

10. The control device for series-parallel hybrid vehicles according to claim 8, wherein The switching module is further configured to: When a series switching of the operating mode is triggered, perform a series switching of the operating mode.

11. An electronic device, characterized in that, Comprising: A processor, a memory, and a computer program stored on the memory and capable of running on the processor, where the computer program, when executed by the processor, implements the steps of the control method for a series-parallel hybrid vehicle according to any one of claims 1-7.

12. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the control method for a series-parallel hybrid vehicle according to any one of claims 1-7 are implemented.

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