A control method, device, equipment and medium for a hybrid vehicle driving mode

Abstract

An embodiment of the present invention discloses a control method, device, equipment and medium for a hybrid vehicle driving mode. The method includes: obtaining current vehicle state data of a vehicle to be controlled through a clutch engagement and disengagement decision module; obtaining current vehicle torque data through the clutch engagement and disengagement decision module when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, and determining the required torque of the power system according to the current vehicle torque data; determining a first torque threshold value through the clutch engagement and disengagement decision module, and generating a clutch engagement request when it is determined that the required torque of the power system meets the first torque threshold value; controlling the vehicle to be controlled to enter a parallel driving mode according to the clutch engagement request through a clutch engagement and disengagement execution module. The technical solution of the embodiment of the present invention can avoid mis-triggering the operation of entering the parallel driving mode, thereby improving the driving stability of the hybrid vehicle.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of vehicle control, and in particular, to a control method, device, equipment and medium for the driving mode of a hybrid vehicle. Background Art

[0002] In the parallel driving mode of existing hybrid vehicles, when it is mainly considered that the current vehicle condition is suitable for direct engine drive, the clutch is combined to directly involve the engine in vehicle drive. This not only reduces the power generation of the generator, but also can reduce the energy loss caused by the secondary conversion of electrical energy when the drive motor drives the vehicle, thereby improving the energy transfer efficiency of the system.

[0003] Currently, when controlling a hybrid vehicle to enter the parallel driving mode, the economic situation is generally considered. For example, the vehicle condition (such as vehicle speed, driver's required torque, etc.) can make the engine operate in the high-efficiency area, that is, the driver's required torque and the torque and engine speed converted to the engine end when the vehicle speed can make the engine operate in the high-efficiency area. However, the above method is more suitable for steady-state conditions (such as the throttle and vehicle speed are relatively stable or relatively stable within a certain range). During the process of the driver stepping on the accelerator pedal or releasing the accelerator pedal, due to the change of the driver's required torque, the operation of entering the parallel driving mode may be mis-triggered, resulting in the situation that the system does not meet the parallel trigger conditions during the process of entering the parallel driving mode and cannot enter the parallel driving mode, reducing the driving stability of the vehicle. Summary of the Invention

[0004] The embodiments of the present invention provide a control method, device, equipment and medium for the driving mode of a hybrid vehicle, which can avoid the mis-triggered operation of entering the parallel driving mode, thereby improving the driving stability of the hybrid vehicle.

[0005] According to one aspect of the present invention, there is provided a control method for the driving mode of a hybrid vehicle, including:

[0006] Obtaining the current vehicle state data of the vehicle to be controlled through a clutch engagement and disengagement decision module;

[0007] When the clutch engagement and disengagement decision module determines that the current vehicle state data meets the necessary conditions for clutch engagement, obtaining the current vehicle torque data, and determining the power system required torque according to the current vehicle torque data;

[0008] Determining a first torque threshold value through the clutch engagement and disengagement decision module, and generating a clutch engagement request when it is determined that the power system required torque meets the first torque threshold value;

[0009] Based on the clutch engagement / disengagement request from the clutch engagement / disengagement execution module, control the vehicle to be controlled to enter the parallel driving mode.

[0010] According to another aspect of the present invention, there is provided a control device for a hybrid vehicle driving mode, including:

[0011] A clutch engagement / disengagement decision module, configured to obtain the current vehicle state data of the vehicle to be controlled; when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, obtain the current vehicle torque data, and determine the power system demand torque according to the current vehicle torque data; determine a first torque threshold value, and when it is determined that the power system demand torque meets the first torque threshold value, generate a clutch engagement request;

[0012] A clutch engagement / disengagement execution module, configured to control the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request.

[0013] According to another aspect of the present invention, there is provided an electronic device, including:

[0014] At least one processor; and

[0015] A memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, the at least one processor is enabled to execute the hybrid vehicle driving mode control method according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to execute the hybrid vehicle driving mode control method according to any embodiment of the present invention when executed.

[0018] In the technical solution of the embodiment of the present invention, the current vehicle state data of the vehicle to be controlled is obtained through the clutch engagement and separation determination module, and when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, the current vehicle torque data is obtained, so as to determine the required torque of the power system according to the current vehicle torque data, and then the first torque threshold value is determined, so as to generate a clutch engagement request when it is determined that the required torque of the power system meets the first torque threshold value. Thus, through the clutch engagement and separation execution module, the vehicle to be controlled is controlled to enter the parallel driving mode according to the clutch engagement request, which solves the problem of low driving stability of existing hybrid vehicles during driving due to the inability to enter the parallel driving mode due to misoperation, and can avoid mis-triggering the operation of entering the parallel driving mode, thereby improving the driving stability of hybrid vehicles.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic structural diagram of a hybrid system of a hybrid vehicle in the prior art;

[0022] Figure 2 is a flowchart of a method for controlling a driving mode of a hybrid vehicle provided in Embodiment 1 of the present invention;

[0023] Figure 3 is a flowchart of a method for controlling a driving mode of a hybrid vehicle provided in Embodiment 2 of the present invention;

[0024] Figure 4 is a schematic diagram for analyzing a driver's required torque provided in Embodiment 2 of the present invention;

[0025] Figure 5 is a schematic diagram of an engine external characteristic curve provided in Embodiment 2 of the present invention;

[0026] Figure 6 is a schematic diagram of a device for controlling a driving mode of a hybrid vehicle provided in Embodiment 3 of the present invention;

[0027] Figure 7It is a schematic structural diagram of an electronic device for implementing the hybrid vehicle driving mode control method according to an embodiment of the present invention. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] Figure 1 is a schematic structural diagram of a hybrid system of a hybrid vehicle in the prior art, as Figure 1 shown, the drive motor in the hybrid system of the hybrid vehicle can be coupled to the reduction mechanism through a gear, the generator and the engine are connected by gear meshing, and the engine flywheel end is power-connected and terminated with the rear-end reduction mechanism through a clutch.

[0031] The hybrid system of the hybrid vehicle includes three main driving modes: pure electric driving mode, series driving mode, and parallel driving mode. Among them, the pure electric driving mode includes engine shutdown, clutch separation, and the drive motor drives the vehicle alone. The series driving mode includes the engine running to drive the generator to generate electricity, the clutch separation, and the drive motor drives the vehicle alone. The parallel driving mode includes engine drive, clutch engagement, the generator generates electricity or follows, and the drive motor assists or follows.

[0032] When the hybrid system of a hybrid vehicle is in the series driving mode, the hybrid system of the hybrid vehicle performs a clutch engagement operation in response to a clutch engagement request, so that the hybrid system of the hybrid vehicle enters the parallel driving mode. When the hybrid system of the hybrid vehicle is in the parallel driving mode, the hybrid system of the hybrid vehicle performs a clutch disengagement operation in response to a clutch disengagement request, so that the hybrid system of the hybrid vehicle enters the series driving mode.

[0033] Embodiment 1

[0034] Figure 2 FIG. is a flowchart of a control method for a driving mode of a hybrid vehicle provided in Embodiment 1 of the present invention. This embodiment is applicable to a situation where an operation of accidentally triggering entry into the parallel driving mode is avoided. This method can be executed by a control device for the driving mode of a hybrid vehicle. The device can be implemented in a software and / or hardware manner and can generally be directly integrated in an electronic device that executes this method. The electronic device can be a terminal device or a server device. The embodiments of the present invention do not limit the type of the electronic device that executes the control method for the driving mode of a hybrid vehicle. Specifically, as Figure 2 shown, the control method for the driving mode of the hybrid vehicle may specifically include the following steps:

[0035] S210. Obtain the current vehicle state data of the vehicle to be controlled through a clutch engagement / disengagement decision module.

[0036] Among them, the clutch engagement / disengagement decision module can be a module for determining clutch engagement or clutch disengagement. The vehicle to be controlled can be any hybrid vehicle that needs to perform driving mode control. The current vehicle state data can be any data that can characterize the state of the vehicle to be controlled at the current moment. For example, it can be the vehicle driving state or the vehicle engine state, etc. The embodiments of the present invention do not limit this.

[0037] In the embodiment of the present invention, the current vehicle state data of the vehicle to be controlled is obtained through the clutch engagement / disengagement decision module to determine whether the current vehicle state data meets the necessary conditions for clutch engagement. It should be noted that before obtaining the current vehicle state data of the vehicle to be controlled through the clutch engagement / disengagement decision module, the current vehicle state data can be directly read or calculated by other modules. The embodiments of the present invention do not limit this.

[0038] S220. When the clutch engagement / disengagement decision module determines that the current vehicle state data meets the necessary conditions for clutch engagement, obtain the current vehicle torque data and determine the power system demand torque according to the current vehicle torque data.

[0039] Among them, the necessary conditions for clutch engagement can be the conditions that must be met for clutch engagement. The current vehicle torque data can be any torque data of the vehicle to be controlled at the current moment. For example, it can be the torque data corresponding to the power generation power required by the vehicle air conditioner, or the torque data corresponding to the charging power required by the power battery, etc. The embodiments of the present invention do not limit this. The power system demand torque can be the torque required for the operation of the hybrid system of the vehicle to be controlled.

[0040] In the embodiments of the present invention, after obtaining the current vehicle state data of the vehicle to be controlled through the clutch engagement and disengagement determination module, it can further determine whether the current vehicle state data meets the necessary conditions for clutch engagement through the clutch engagement and disengagement determination module. And when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, obtain the current vehicle torque data, and determine the power system demand torque according to the current vehicle torque data. It can be understood that the current vehicle state data meets the necessary conditions for clutch engagement, indicating that the vehicle to be controlled meets the necessary conditions for entering the parallel driving mode, and then it can further determine whether the vehicle to be controlled can enter the parallel driving mode according to the power system demand torque.

[0041] Optionally, the method may further include: generating a clutch disengagement request through the clutch engagement and disengagement determination module when it is determined that the current vehicle state data does not meet the necessary conditions for clutch engagement; controlling the vehicle to be controlled to enter the series driving mode through the clutch engagement and disengagement execution module according to the clutch disengagement request.

[0042] Among them, the clutch disengagement request can be a request to disengage the clutch. The clutch engagement and disengagement execution module can be a module for performing clutch engagement or clutch disengagement.

[0043] Specifically, determine whether the current vehicle state data meets the necessary conditions for clutch engagement through the clutch engagement and disengagement determination module, and generate a clutch disengagement request when it is determined that the current vehicle state data does not meet the necessary conditions for clutch engagement, so as to control the clutch to disengage through the clutch engagement and disengagement execution module according to the clutch disengagement request, so that the vehicle to be controlled enters the series driving mode. It can be understood that the current vehicle state data does not meet the necessary conditions for clutch engagement, indicating that the vehicle to be controlled does not meet the necessary conditions for entering the parallel driving mode, and then the vehicle to be controlled can be controlled to enter the series driving mode.

[0044] S230. Determine a first torque threshold value through the clutch engagement and disengagement determination module, and generate a clutch engagement request when it is determined that the power system demand torque meets the first torque threshold value.

[0045] Among them, the first torque threshold can be the torque threshold of the engine of the vehicle to be controlled that needs to be satisfied for the vehicle to be controlled to enter the parallel driving mode. The clutch engagement request can be a request to engage the clutch.

[0046] In an embodiment of the present invention, after the clutch engagement / disengagement decision module determines the power system demand torque according to the current vehicle torque data, the clutch engagement / disengagement decision module can further determine the first torque threshold and determine whether the power system demand torque meets the first torque threshold. If the power system demand torque meets the first torque threshold, the clutch engagement / disengagement decision module generates a clutch engagement request.

[0047] S240. Control the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request through the clutch engagement / disengagement execution module.

[0048] In an embodiment of the present invention, after the clutch engagement / disengagement decision module generates a clutch engagement request, the clutch engagement / disengagement execution module can further control the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request.

[0049] The technical solution of this embodiment is that the clutch engagement / disengagement decision module obtains the current vehicle state data of the vehicle to be controlled, and obtains the current vehicle torque data when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, so as to determine the power system demand torque according to the current vehicle torque data, and then determine the first torque threshold, so as to generate a clutch engagement request when it is determined that the power system demand torque meets the first torque threshold. Thus, the clutch engagement / disengagement execution module controls the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request, solving the problem of low driving stability of existing hybrid vehicles during driving due to misoperation and being unable to enter the parallel driving mode, and being able to avoid mis-triggering the operation of entering the parallel driving mode, thereby improving the driving stability of hybrid vehicles.

[0050] Embodiment Two

[0051] Figure 3 It is a flowchart of a control method for the driving mode of a hybrid vehicle provided in Embodiment Two of the present invention. This embodiment further refines the above technical solutions, and gives various specific and optional implementation manners for the clutch engagement / disengagement decision module to obtain the engine start / stop request state data of the vehicle to be controlled, determine the power system demand torque according to the current vehicle torque data, and determine the first torque threshold. The technical solutions in this embodiment can be combined with the various optional solutions in one or more of the above embodiments. For example Figure 3As shown, the method may include the following steps:

[0052] S310. Obtain the current vehicle state data of the vehicle to be controlled through the clutch engagement and disengagement determination module.

[0053] Optionally, the current vehicle state data may include: current vehicle speed data, engine start / stop request status data, and engine state data. Before obtaining the engine start / stop request status data of the vehicle to be controlled through the clutch engagement and disengagement determination module, it may further include: obtaining the driver demand torque, battery state of charge data, and engine water temperature data through the engine start / stop determination module, and determining the engine start / stop request status data according to at least one of the driver demand torque, battery state of charge data, and engine water temperature data.

[0054] Among them, the current vehicle speed data may be the data of the vehicle driving speed at the current moment. The engine start / stop request status data may be the status data of the engine start request or the engine stop request, which can be used to characterize the request status of the engine. It can be understood that the engine start request may be a request for the engine to start, that is, a request for the engine to run. The engine stop request may be a request for the engine to stop, that is, a request for the engine to stop running. Optionally, when the engine start request is valid, the engine start / stop execution module controls the generator to output a driving torque and drags the engine to rotate. After the engine injects fuel and ignites and runs by itself, it outputs power in response to the system demand torque. When the engine stop request is valid, the engine start / stop execution module reduces the engine speed through the system demand torque and stops the engine from injecting fuel, so as to quickly stop the engine.

[0055] Among them, the engine state data may be the data of the engine operating state, which can be used to characterize whether the engine is running. The engine start / stop determination module may be a module for determining the engine start / stop request status data. The driver demand torque may be the torque required by the driver during the vehicle driving process. The battery state of charge data may be the power data of the battery in the hybrid system of the vehicle to be controlled.

[0056] Specifically, before obtaining the engine start / stop request status data of the vehicle to be controlled through the clutch engagement / disengagement determination module, the driver demand torque, the state of charge (SOC) data of the battery, and the engine water temperature data can be obtained through the engine start / stop determination module, and the engine start / stop request status data can be determined based on at least one of the driver demand torque, the SOC data of the battery, and the engine water temperature data. Exemplarily, when the driver demand torque reaches a preset torque threshold, the engine start / stop request status data can be determined as the engine start request data. Alternatively, when the SOC data of the battery is within a preset charge range, the engine start / stop request status data can also be determined as the engine start request data. Alternatively, when the driver demand torque reaches a preset torque threshold and the engine water temperature data also reaches a preset water temperature threshold, the engine start / stop request status data can be determined as the engine start request data.

[0057] Optionally, the method may further include: obtaining the driver throttle opening and the current vehicle speed data through the driver demand torque parsing module, and determining the driver demand torque based on the driver throttle opening and the current vehicle speed data.

[0058] Among them, the driver demand torque parsing module may be a module for determining the driver demand torque. The driver throttle opening may be the opening of the throttle pedal when the driver drives the vehicle.

[0059] Specifically, the driver throttle opening and the current vehicle speed data are obtained through the driver demand torque parsing module, and the driver demand torque is determined based on the driver throttle opening and the current vehicle speed data. Exemplarily, Figure 4 is a schematic diagram of parsing the driver demand torque provided in Embodiment 2 of the present invention. As Figure 4 shown, the schematic diagram of parsing the driver demand torque is a three-dimensional image. Among them, the X-axis represents the vehicle speed, the Y-axis represents the throttle opening, and the Z-axis represents the torque. To determine the driver demand torque based on the driver throttle opening and the current vehicle speed data, the corresponding relationship between the driver throttle opening, the current vehicle speed data, and the driver demand torque in the schematic diagram of parsing the driver demand torque can be used to determine the driver demand torque.

[0060] S320. When the clutch engagement / disengagement determination module determines that the current vehicle state data meets the necessary conditions for clutch engagement, obtain the current vehicle torque data, and determine the power system demand torque based on the current vehicle torque data.

[0061] Optionally, determining that the current vehicle state data meets the necessary conditions for clutch engagement may include: determining that the current vehicle state data meets the necessary conditions for clutch engagement when it is determined that the current vehicle speed data is greater than the clutch engagement speed threshold, the engine start / stop request status data meets the requirement for an effective engine start request, and the engine state data meets the engine operating state. Optionally, if the current vehicle speed data is not greater than the clutch engagement speed threshold, or the engine start / stop request status data does not meet the requirement for an effective engine start request, or the engine state data does not meet the engine operating state, it can be determined that the current vehicle state data does not meet the necessary conditions for clutch engagement.

[0062] Exemplarily, if VehicSpeed > ClutchClsSpdLimt, and EngStrtReq = 1, and EngSts = 1, then ClutchClsNesCdn = 1; if any one of the above three conditions is not met, then ClutchClsNesCdn = 0. Wherein, VehicSpeed represents the current vehicle speed data, ClutchClsSpdLimt represents the clutch engagement speed threshold, EngStrtReq = 1 indicates that the engine start request is effective, EngSts = 1 indicates that the engine is in the operating state, ClutchClsNesCdn = 1 indicates that the current vehicle state data meets the necessary conditions for clutch engagement, and ClutchClsNesCdn = 0 indicates that the current vehicle state data does not meet the necessary conditions for clutch engagement.

[0063] Optionally, determining the power system demand torque according to the current vehicle torque data may include: determining the power system demand torque according to the driver demand torque, the torque corresponding to the accessory demand power, and the torque corresponding to the power battery power.

[0064] Among them, the accessory demand power may be the power required for all accessories in the vehicle to be controlled to operate. It should be noted that the accessories in the vehicle to be controlled may be devices that consume electric power in the vehicle to be controlled, such as an air conditioner, a central control unit, or a stereo, etc. The embodiments of the present invention do not limit this. The power battery power may be the power provided by the battery that provides power.

[0065] Specifically, after obtaining the current vehicle state data of the vehicle to be controlled through the clutch engagement and disengagement determination module, it is possible to further determine by the clutch engagement and disengagement determination module whether the current vehicle state data meets the necessary conditions for clutch engagement. And when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, obtain the driver demand torque, the torque corresponding to the accessory demand power, and the torque corresponding to the power battery power in the current vehicle torque data, and determine the power system demand torque according to the driver demand torque, the torque corresponding to the accessory demand power, and the torque corresponding to the power battery power.

[0066] Optionally, determining the power system demand torque according to the driver demand torque, the torque corresponding to the accessory demand power, and the torque corresponding to the power battery power may include determining the power system demand torque based on the following formula:

[0067]

[0068] Wherein, Tsys represents the power system demand torque, Tdrv represents the driver demand torque, Pacc represents the accessory demand power, Pbat represents the power battery power, Nmot represents the drive motor speed, Imot represents the speed ratio from the drive motor to the wheel end, and Ieng represents the speed ratio from the engine to the wheel end.

[0069] S330. Obtain the current engine speed through the clutch engagement and disengagement determination module, determine the engine external characteristic torque according to the current engine speed, and determine the first torque upper limit threshold according to the engine external characteristic torque and the first torque coefficient.

[0070] Wherein, the current engine speed may be the speed of the engine at the current moment. The engine external characteristic torque may be the torque output from the crankshaft end of the engine. The first torque coefficient may be the calculation coefficient corresponding to the first torque threshold. The first torque upper limit threshold may be the maximum threshold of the engine torque of the vehicle to be controlled that needs to be met for the vehicle to be controlled to enter the parallel driving mode.

[0071] In the embodiment of the present invention, the current engine speed is obtained through the clutch engagement and disengagement determination module, and the engine external characteristic torque is determined according to the current engine speed, so as to determine the first torque upper limit threshold according to the engine external characteristic torque and the first torque coefficient.

[0072] Optionally, the current engine speed may be determined based on the following formula:

[0073]

[0074] Optionally, determining the engine full-load torque based on the current engine speed may be performed by determining the engine full-load torque according to the current engine speed through an engine full-load torque curve graph. It can be understood that when the engine is running, the three basic performance indicators of power, torque, and fuel consumption will all change with the load. These changes follow certain rules. Depicting these regular changes as curves results in a curve graph reflecting the engine characteristics. Exemplarily, Figure 5 is a schematic diagram of an engine full-load torque curve provided in the second embodiment of the present invention. As Figure 5 shown, the abscissa of the engine full-load torque curve graph is the engine speed, and the ordinate is the torque.

[0075] Optionally, determining the engine full-load torque based on the current engine speed may also be performed by determining the engine full-load torque according to the current engine speed through an engine full-load torque table. Exemplarily, Table 1 is an engine full-load torque table, and the corresponding relationship between the engine full-load torque and the engine speed is shown in Table 1.

[0076] Table 1 Engine full-load torque table

[0077] Engine speed / rpm 1000 2000 3500 4500 5000 5500 Engine full load torque / Nm 150 250 250 250 220 0

[0078] Optionally, determining the first torque upper limit threshold based on the engine full-load torque and the first torque coefficient may be performed by determining the first torque upper limit threshold based on the following formula:

[0079] Tpup = Tengmax * Rpin; 0.7 < Rpin < 0.9

[0080] where Tpup represents the first torque upper limit threshold, Tengmax represents the engine full-load torque, and Rpin represents the first torque coefficient.

[0081] S340. Obtain the current vehicle speed data through the clutch engagement and disengagement determination module, determine the vehicle coasting resistance torque according to the current vehicle speed data, and determine the first torque lower limit threshold according to the vehicle coasting resistance torque.

[0082] Among them, the vehicle coasting resistance torque may be the resistance torque of the vehicle during driving. The first torque lower limit threshold may be the minimum threshold of the engine torque of the vehicle to be controlled required for the vehicle to be controlled to enter the parallel driving mode.

[0083] In the embodiment of the present invention, the current vehicle speed data is obtained through the clutch engagement and disengagement determination module, and the vehicle coasting resistance torque is determined according to the current vehicle speed data, so as to determine the first torque lower limit threshold according to the vehicle coasting resistance torque.

[0084] Optionally, the vehicle coasting resistance torque can be determined based on the current vehicle speed data. Specifically, the vehicle coasting resistance torque can be determined through the vehicle coasting resistance table according to the current vehicle speed data. Exemplarily, Table 2 is the vehicle coasting resistance table, and the corresponding relationship between the current vehicle speed data and the vehicle coasting resistance torque is shown in Table 2.

[0085] Table 2 Vehicle Coasting Resistance Table

[0086] Vehicle speed / kmph 50 80 90 120 150 180 Vehicle coasting resistance torque / Nm 50 60 80 110 130 150

[0087] Optionally, the first torque lower limit threshold can be determined based on the vehicle coasting resistance torque. The first torque lower limit threshold can be determined based on the following formula:

[0088] Tplo = Tres / Ieng

[0089] where Tplo represents the first torque lower limit threshold and Tres represents the vehicle coasting resistance torque.

[0090] S350. Determine the first torque threshold based on the first torque upper limit threshold and the first torque lower limit threshold through the clutch engagement and disengagement decision module.

[0091] In the embodiment of the present invention, after determining the first torque upper limit threshold and the first torque lower limit threshold, the first torque threshold can be further determined by the clutch engagement and disengagement decision module according to the first torque upper limit threshold and the first torque lower limit threshold.

[0092] It should be noted that the embodiment of the present invention does not limit the order of S330 and S340. That is, S340 and S330 can be performed synchronously or either one of them can be implemented.

[0093] Another thing to note is that the embodiment of the present invention does not limit the order of S310 - S320 and S330 - S340. That is, S310 - S320 can be implemented first, followed by S330 - S340, or S330 - S340 can be implemented first, followed by S310 - S320. They can also be implemented in parallel or either one of them can be implemented.

[0094] S360. Generate a clutch engagement request through the clutch engagement and disengagement decision module when it is determined that the power system demand torque meets the first torque threshold.

[0095] Optionally, before generating the clutch engagement request, it may further include: determining the driver's throttle change rate through the clutch engagement and disengagement decision module. Correspondingly, generating the clutch engagement request may include: generating the clutch engagement request when the driver's throttle change rate is less than the throttle change threshold.

[0096] Among them, the driver's throttle change rate can be the change rate of the throttle pedal when the driver is driving the vehicle. The throttle change threshold can be a preset threshold of the throttle change rate.

[0097] Specifically, after the clutch engagement and disengagement determination module determines that the power system demand torque meets the first torque threshold, the clutch engagement and disengagement determination module can further determine the driver's throttle change rate, and generate a clutch engagement request when the driver's throttle change rate is less than the throttle change threshold.

[0098] S370. The clutch engagement and disengagement execution module controls the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request.

[0099] Optionally, the method may further include: the clutch engagement and disengagement determination module determines a second torque threshold, and determines the driver's throttle change rate when it is determined that the power system demand torque is greater than the second torque threshold; the clutch engagement and disengagement determination module generates a clutch disengagement request when the driver's throttle change rate is less than the throttle change threshold; the clutch engagement and disengagement execution module controls the vehicle to be controlled to enter the series driving mode according to the clutch disengagement request.

[0100] Among them, the second torque threshold can be the torque threshold of the engine of the vehicle to be controlled that needs to be met for the vehicle to be controlled to exit the parallel driving mode.

[0101] Specifically, the clutch engagement and disengagement determination module determines the second torque threshold, determines the driver's throttle change rate when the power system demand torque is greater than the second torque threshold, and generates a clutch disengagement request when the driver's throttle change rate is less than the throttle change threshold, so that the clutch engagement and disengagement execution module controls the clutch to disengage according to the clutch disengagement request, so that the vehicle to be controlled enters the series driving mode.

[0102] Optionally, determining the second torque threshold by the clutch engagement and disengagement determination module may include: the clutch engagement and disengagement determination module obtains the current engine speed and determines the engine external characteristic torque according to the current engine speed; the clutch engagement and disengagement determination module obtains the maximum battery discharge power and the maximum driving torque of the drive motor, and determines the parallel assist ability according to the maximum battery discharge power and the maximum driving torque of the drive motor; the clutch engagement and disengagement determination module determines the second torque threshold according to the engine external characteristic torque and the parallel assist ability.

[0103] Among them, the maximum discharge power of the battery can be the maximum power value that the discharge power of the battery can reach. The maximum driving torque of the driving motor can be the maximum torque value that the driving torque of the driving motor can reach. The parallel assist ability can be the torque ability provided by the assist device when entering the parallel driving mode.

[0104] Specifically, the current engine speed is obtained through the clutch engagement and disengagement determination module, the engine external characteristic torque is determined according to the current engine speed, the maximum discharge power of the battery and the maximum driving torque of the driving motor are obtained, and the parallel assist ability is determined according to the maximum discharge power of the battery and the maximum driving torque of the driving motor, so as to determine the second torque threshold according to the engine external characteristic torque and the parallel assist ability.

[0105] Optionally, to determine the parallel assist ability according to the maximum discharge power of the battery and the maximum driving torque of the driving motor, the parallel assist ability can be determined based on the following formula:

[0106]

[0107] Among them, Tboost represents the parallel assist ability, BatPdis represents the maximum discharge power of the battery, and Tmotdrvmax represents the maximum driving torque of the driving motor.

[0108] Optionally, to determine the second torque threshold according to the engine external characteristic torque and the parallel assist ability, the second torque threshold can be determined based on the following formula:

[0109] Tpout = Tengmax + Tboost

[0110] Among them, Tpout represents the second torque threshold.

[0111] The technical solution of this embodiment obtains the current vehicle state data of the vehicle to be controlled through the clutch engagement and disengagement decision module, and obtains the current vehicle torque data when the current vehicle state data meets the necessary conditions for clutch engagement, so as to determine the required torque of the power system according to the current vehicle torque data. Then, the clutch engagement and disengagement decision module obtains the current engine speed, and determines the engine external characteristic torque according to the current engine speed, so as to determine the first torque upper limit threshold according to the engine external characteristic torque and the first torque coefficient. Then, the clutch engagement and disengagement decision module obtains the current vehicle speed data, and determines the vehicle coasting resistance torque according to the current vehicle speed data, so as to determine the first torque lower limit threshold according to the vehicle coasting resistance torque. Thus, the clutch engagement and disengagement decision module determines the first torque threshold according to the first torque upper limit threshold and the first torque lower limit threshold, and generates a clutch engagement request when the required torque of the power system meets the first torque threshold. Furthermore, the clutch engagement and disengagement execution module controls the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request, solving the problem that the existing hybrid vehicle has low driving stability due to the inability to enter the parallel driving mode during driving due to misoperation, and can avoid the operation of accidentally triggering the entry into the parallel driving mode, thereby improving the driving stability of the hybrid vehicle.

[0112] Embodiment III

[0113] Figure 6 is a schematic diagram of a hybrid vehicle driving mode control device provided in Embodiment III of the present invention, as Figure 6 shown, the device includes: a clutch engagement and disengagement decision module 610 and a clutch engagement and disengagement execution module 620, wherein:

[0114] The clutch engagement and disengagement decision module 610 is configured to obtain the current vehicle state data of the vehicle to be controlled; when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, obtain the current vehicle torque data, and determine the required torque of the power system according to the current vehicle torque data; determine the first torque threshold, and generate a clutch engagement request when it is determined that the required torque of the power system meets the first torque threshold;

[0115] The clutch engagement and disengagement execution module 620 is configured to control the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request.

[0116] The technical solution of this embodiment obtains the current vehicle state data of the vehicle to be controlled through the clutch engagement and disengagement determination module, and obtains the current vehicle torque data when it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, so as to determine the required torque of the power system according to the current vehicle torque data, and then determine the first torque threshold value, so as to generate a clutch engagement request when it is determined that the required torque of the power system meets the first torque threshold value, so that the clutch engagement and disengagement execution module controls the vehicle to be controlled to enter the parallel driving mode according to the clutch engagement request, solving the problem of low vehicle driving stability caused by the inability to enter the parallel driving mode due to misoperation during the driving process of existing hybrid vehicles, and being able to avoid mis-triggering the operation of entering the parallel driving mode, thereby improving the driving stability of hybrid vehicles.

[0117] Optionally, the current vehicle state data includes: current vehicle speed data, engine start / stop request status data, and engine status data; correspondingly, the device may further include an engine start / stop determination module, where the engine start / stop determination module may be specifically configured to obtain the driver's required torque, battery state of charge data, and engine water temperature data, and determine the engine start / stop request status data according to at least one of the driver's required torque, battery state of charge data, and engine water temperature data.

[0118] Optionally, the clutch engagement and disengagement determination module 610 may be further configured to: determine the required torque of the power system according to the driver's required torque, the torque corresponding to the accessory required power, and the torque corresponding to the power battery power.

[0119] Optionally, the device may further include a driver's required torque analysis module, where the driver's required torque analysis module may be specifically configured to: obtain the driver's throttle opening and current vehicle speed data, and determine the driver's required torque according to the driver's throttle opening and current vehicle speed data.

[0120] Optionally, the clutch engagement and disengagement determination module 610 may be further configured to: obtain the current engine speed through the clutch engagement and disengagement determination module, determine the engine external characteristic torque according to the current engine speed, and determine the first torque upper limit threshold according to the engine external characteristic torque and the first torque coefficient; obtain the current vehicle speed data through the clutch engagement and disengagement determination module, determine the vehicle coasting resistance torque according to the current vehicle speed data, and determine the first torque lower limit threshold according to the vehicle coasting resistance torque; determine the first torque threshold value according to the first torque upper limit threshold and the first torque lower limit threshold through the clutch engagement and disengagement determination module.

[0121] Optionally, the clutch engagement / disengagement determination module 610 may further be specifically configured to: determine a second torque threshold value, and determine the driver's throttle change rate when it is determined that the required torque of the power system is greater than the second torque threshold value; generate a clutch disengagement request when the driver's throttle change rate is less than the throttle change threshold value; correspondingly, the clutch engagement / disengagement execution module 620 may further be specifically configured to: control the vehicle to be controlled to enter the series driving mode according to the clutch disengagement request.

[0122] Optionally, the clutch engagement / disengagement determination module 610 may further be configured to: obtain the current engine speed through the clutch engagement / disengagement determination module, and determine the engine external characteristic torque according to the current engine speed; obtain the maximum battery discharge power and the maximum driving torque of the drive motor through the clutch engagement / disengagement determination module, and determine the parallel assist ability according to the maximum battery discharge power and the maximum driving torque of the drive motor; determine the second torque threshold value according to the engine external characteristic torque and the parallel assist ability through the clutch engagement / disengagement determination module.

[0123] Optionally, the clutch engagement / disengagement determination module 610 may further be specifically configured to: generate a clutch disengagement request when it is determined that the current vehicle state data does not meet the necessary conditions for clutch engagement through the clutch engagement / disengagement determination module; correspondingly, the clutch engagement / disengagement execution module 620 may further be specifically configured to: control the vehicle to be controlled to enter the series driving mode according to the clutch disengagement request through the clutch engagement / disengagement execution module.

[0124] The hybrid vehicle driving mode control device provided by the embodiments of the present invention can execute the hybrid vehicle driving mode control method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0125] Embodiment 4

[0126] Figure 7 FIG. shows a schematic structural diagram of an electronic device 10 that can be used to implement the embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0127] As Figure 7As shown, the electronic device 10 includes at least one processor 11 and a memory communicatively connected to the at least one processor 11, such as read-only memory (ROM) 12, random access memory (RAM) 13, etc. Among them, the memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate 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 electronic device 10 can also be stored. The processor 11, ROM 12, and RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0128] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0129] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the 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 appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the hybrid vehicle driving mode control method.

[0130] In some embodiments, the hybrid vehicle driving mode control method can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the hybrid vehicle driving mode control method described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the hybrid vehicle driving mode control method in any other appropriate manner (e.g., by means of firmware).

[0131] The various embodiments of the systems and techniques described above in this specification can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems-on-chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be a special-purpose or general-purpose programmable processor that receives data and instructions from, and transmits data and instructions to, a storage system, at least one input device, and at least one output device.

[0132] The computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can 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 / operations specified in the flowchart and / or block diagram to be implemented. The computer programs can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0133] In the context of the present invention, a computer-readable storage medium can 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. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the 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 portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0134] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and a pointing device (e.g., a mouse or a trackball) through which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the 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 input, voice input, or tactile input).

[0135] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0136] The computing system can include a client and a server. The client and the server are generally far from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0137] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0138] The above specific implementation manners do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A control method for a hybrid vehicle driving mode, characterized in that, it includes: Obtaining the current vehicle state data of the vehicle to be controlled through a clutch engagement and disengagement decision module; When the clutch engagement and disengagement decision module determines that the current vehicle state data meets the necessary conditions for clutch engagement, obtaining the current vehicle torque data, and determining the power system demand torque according to the current vehicle torque data; Determining a first torque threshold value through the clutch engagement and disengagement decision module, and generating a clutch engagement request when it is determined that the power system demand torque meets the first torque threshold value; Controlling the vehicle to be controlled to enter a parallel driving mode according to the clutch engagement request through the clutch engagement and disengagement execution module; The determining of the first torque threshold value by the clutch engagement and disengagement decision module includes: Obtaining the current engine speed through the clutch engagement and disengagement decision module, determining the engine external characteristic torque according to the current engine speed, and determining a first torque upper limit threshold according to the engine external characteristic torque and a first torque coefficient; Obtaining the current vehicle speed data through the clutch engagement and disengagement decision module, determining the vehicle coasting resistance torque according to the current vehicle speed data, and determining a first torque lower limit threshold according to the vehicle coasting resistance torque; Determining the first torque threshold value according to the first torque upper limit threshold and the first torque lower limit threshold through the clutch engagement and disengagement decision module.

2. The method according to claim 1, characterized in that, the current vehicle state data includes: current vehicle speed data, engine start / stop request status data, and engine status data; Before obtaining the engine start / stop request status data of the vehicle to be controlled through the clutch engagement and disengagement decision module, it further includes: Obtaining the driver demand torque, battery state of charge data, and engine water temperature data through an engine start / stop decision module, and determining the engine start / stop request status data according to at least one of the driver demand torque, battery state of charge data, and engine water temperature data.

3. The method according to claim 1, characterized in that, the determining of the power system demand torque according to the current vehicle torque data includes: Determining the power system demand torque according to the driver demand torque, the torque corresponding to the accessory demand power, and the torque corresponding to the power battery power.

4. The method according to claim 2 or 3, characterized in that, the method further includes: Obtaining the driver throttle opening and current vehicle speed data through a driver demand torque analysis module, and determining the driver demand torque according to the driver throttle opening and the current vehicle speed data.

5. The method according to claim 1, characterized in that, before generating the clutch engagement request, it further includes: Determining the driver throttle change rate through the clutch engagement and disengagement decision module; The generating of the clutch engagement request includes: Generating a clutch engagement request when the driver throttle change rate is less than the throttle change threshold.

6. The method according to claim 1, characterized in that, The method further includes: Determining, by the clutch engagement and disengagement decision module, a second torque threshold value, and determining a driver throttle change rate when it is determined that the power system demand torque is greater than the second torque threshold value; Generating, by the clutch engagement and disengagement decision module, a clutch disengagement request when the driver throttle change rate is less than a throttle change threshold value; Controlling, by the clutch engagement and disengagement execution module, the vehicle to be controlled to enter a series driving mode according to the clutch disengagement request.

7. The method according to claim 6, wherein, The determining, by the clutch engagement and disengagement decision module, the second torque threshold value includes: Obtaining, by the clutch engagement and disengagement decision module, the current engine speed, and determining the engine external characteristic torque according to the current engine speed; Obtaining, by the clutch engagement and disengagement decision module, the maximum battery discharge power and the maximum driving torque of the drive motor, and determining the parallel assist ability according to the maximum battery discharge power and the maximum driving torque of the drive motor; Determining, by the clutch engagement and disengagement decision module, the second torque threshold value according to the engine external characteristic torque and the parallel assist ability.

8. The method according to claim 1, wherein, The method further includes: Generating, by the clutch engagement and disengagement decision module, a clutch disengagement request when it is determined that the current vehicle state data does not meet the necessary conditions for clutch engagement; Controlling, by the clutch engagement and disengagement execution module, the vehicle to be controlled to enter a series driving mode according to the clutch disengagement request.

9. A control device for a hybrid vehicle driving mode, wherein, It includes: A clutch engagement and disengagement decision module, configured to obtain the current vehicle state data of the vehicle to be controlled; When it is determined that the current vehicle state data meets the necessary conditions for clutch engagement, obtaining the current vehicle torque data, and determining the power system demand torque according to the current vehicle torque data; Determining a first torque threshold value, and generating a clutch engagement request when it is determined that the power system demand torque meets the first torque threshold value; A clutch engagement and disengagement execution module, configured to control the vehicle to be controlled to enter a parallel driving mode according to the clutch engagement request; The clutch engagement and disengagement decision module is further configured to: obtain the current engine speed through the clutch engagement and disengagement decision module, determine the engine external characteristic torque according to the current engine speed, and determine a first torque upper limit threshold according to the engine external characteristic torque and a first torque coefficient; Obtain the current vehicle speed data through the clutch engagement and disengagement decision module, determine the vehicle coasting resistance torque according to the current vehicle speed data, and determine a first torque lower limit threshold according to the vehicle coasting resistance torque; Determining, by the clutch engagement and disengagement decision module, the first torque threshold value according to the first torque upper limit threshold and the first torque lower limit threshold.

10. An electronic device, wherein, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, enables the at least one processor to execute the hybrid vehicle driving mode control method according to any one of claims 1-8.

11. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions for implementing the hybrid vehicle driving mode control method according to any one of claims 1-8 when executed by a processor.

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