Vehicle driving mode adjusting method, device and equipment

Abstract

The invention provides a vehicle driving mode adjusting method, device and equipment, relates to the technical field of vehicle control and is applied to a hybrid power vehicle, the hybrid power vehicle comprises an internal combustion engine and a first motor in driving connection with the internal combustion engine, and the vehicle driving mode adjusting method comprises the steps that in response to a first adjusting instruction, the first motor is in driving connection with the internal combustion engine; adjusting a driving mode of the vehicle to a first target mode; determining a first target parameter of a first motor according to the first adjustment instruction, adjusting an output parameter of the first motor according to the first target mode and the first target parameter, and adjusting the output parameter of the first motor if a second adjustment instruction is received in the process of adjusting the output parameter according to the first target mode and the first target parameter. If yes, the output parameters are adjusted according to the second adjusting instruction and the second target mode, the output parameters comprise the output rotating speed and the output torque, and the vehicle can smoothly and rapidly switch the driving mode.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a vehicle driving mode adjustment method, device and equipment. Background Art

[0002] Hybrid vehicles combine the advantages of multiple power vehicles, have long driving range and low energy consumption, and show great development potential. The hybrid drive system has multiple driving modes, which not only include a variety of driving strategies, but also have their own characteristics, aiming to optimize performance for different driving conditions, thereby ensuring economy while improving the overall control experience.

[0003] In some technical solutions, in order to balance the economy and drivability of hybrid vehicles in different driving modes, the switching frequency is suppressed when the vehicle frequently switches driving modes, or the switching frequency of driving modes is reduced by changing the switching conditions to ensure smoothness and efficiency during driving. However, the actual driving environment is complex and changeable, and the driver's intentions are often in dynamic change. As a result, frequent switching of driving modes is required to meet the driver's changing needs, and the method of suppressing or reducing the switching frequency of driving modes cannot meet the driver's needs.

[0004] Therefore, how to enable the vehicle to switch driving modes smoothly and quickly while meeting the driver's needs has become the key to improving the driving experience of hybrid vehicles. Summary of the invention

[0005] The problem solved by the present invention is how to adjust the driving mode smoothly and quickly while meeting the needs of the driver.

[0006] To solve the above problems, the present invention provides a vehicle driving mode adjustment method, which is applied to a hybrid vehicle, wherein the hybrid vehicle includes an internal combustion engine and a first motor drivingly connected to the internal combustion engine, and the vehicle driving mode adjustment method includes:

[0007] In response to the first adjustment instruction, adjusting the driving mode of the vehicle to a first target mode;

[0008] Determine the first target parameter of the first motor according to the first adjustment instruction, and adjust the output parameter of the first motor according to the first target mode and the first target parameter, wherein in the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, adjust the output parameter according to the second adjustment instruction and the second target mode, the output parameters include output speed and output torque, and the first motor is used to be connected to an internal combustion engine drive.

[0009] Compared with the prior art, the present invention adjusts the driving mode of the vehicle to the first target mode according to the content indicated by the first adjustment instruction. In this process, the first target parameter required for the first target mode is determined according to the first adjustment instruction, and the output parameter of the first motor is adjusted according to the first target parameter, so that the driving mode of the vehicle is switched to a mode that matches the current working condition. Due to the uncertainty of the working condition and the variability of the driver's intention, the driving mode of the vehicle may be suddenly or frequently switched to match the current working condition, whether in the process of switching the driving mode or not. Therefore, in the process of adjusting the output parameter of the first motor according to the first target mode, the second adjustment instruction is received and processed at any time, and the output parameter of the first motor is adjusted according to the driving mode indicated by the second adjustment instruction, so as to realize the replacement of the driving mode at any time. Specifically, the output parameters of the first motor are adjusted according to different adjustment instructions to control the internal combustion engine to participate in or exit the vehicle driving process, thereby realizing the adjustment of the driving mode to meet the driver's needs. In this process, once an adjustment instruction to adjust the driving mode appears, it is responded to immediately and the ongoing mode adjustment process is exited. Combined with the inherent characteristics of the motor such as rapid response and high precision, the response speed when switching the driving mode is guaranteed. This process only involves the adjustment of the output parameters of the first motor and does not involve other driving devices of the hybrid vehicle. Therefore, it will not affect the normal driving of the vehicle and has good smoothness.

[0010] Optionally, adjusting the output parameter according to the second adjustment instruction and the second target mode includes:

[0011] When the first target mode and the second target mode are different, determining a second target parameter of the first motor according to the second adjustment instruction;

[0012] Acquire current parameters of the first motor;

[0013] The current parameter is adjusted to the second target parameter.

[0014] Optionally, adjusting the current parameter to the second target parameter includes:

[0015] Determining a current mode of the vehicle, and determining an adjustment order of the output parameters according to the current mode;

[0016] determining a current adjustment stage of the first motor;

[0017] When the second adjustment instruction is received, the current parameter is adjusted to the second target parameter with the current adjustment stage as the initial stage.

[0018] Optionally, the current adjustment stage includes a speed adjustment stage and a torque adjustment stage, and when the second adjustment instruction is received, taking the current adjustment stage as the initial stage, adjusting the current parameter to the second target parameter includes:

[0019] When the current adjustment stage is the speed adjustment stage, adjusting the output speed according to the second target parameter, and adjusting the output parameter according to a preset adjustment sequence until the driving mode is adjusted to the second target mode;

[0020] When the current adjustment stage is the torque adjustment stage, the output torque is adjusted according to the second target parameter, and the output parameter is adjusted according to the preset adjustment sequence until the driving mode is adjusted to the second target mode.

[0021] Optionally, the first target mode includes a series mode and a parallel mode, and adjusting the output parameter of the first motor according to the first target mode and the first target parameter includes:

[0022] When the first target mode is the series mode, adjusting the output parameters according to a first order;

[0023] When the first target mode is the parallel mode, the output parameter is adjusted according to a second sequence, wherein the first sequence is opposite to the second sequence.

[0024] Optionally, when the first target mode is the series mode, adjusting the output parameters according to a first order includes:

[0025] When the first target mode is the series mode, adjusting the power generation torque of the first motor to the series torque;

[0026] Disengagement clutch;

[0027] The speed of the first motor is adjusted to a series speed.

[0028] Optionally, when the first target mode is the parallel mode, adjusting the output parameters according to the second sequence includes:

[0029] When the first target mode is the parallel mode, adjusting the speed of the first motor to a parallel speed;

[0030] Combine the clutch;

[0031] The generating torque of the first motor is adjusted to the parallel torque.

[0032] Optionally, before adjusting the driving mode of the vehicle to the first target mode in response to the first adjustment instruction, the method further includes:

[0033] Determining the first target mode indicated by the first adjustment instruction according to a vehicle state, wherein the vehicle state includes a state of charge, a driving speed, and a power target parameter;

[0034] When the state of charge is lower than a charge threshold and the driving speed is lower than a preset speed, the first target mode indicated by the first adjustment instruction is a series mode;

[0035] When the power target parameter is higher than a parameter threshold, the first target mode indicated by the first adjustment instruction is a parallel mode.

[0036] In a second aspect, the present invention further provides a vehicle driving mode adjustment device, which is applied to a hybrid vehicle, wherein the hybrid vehicle includes an internal combustion engine and a first motor drivingly connected to the internal combustion engine, and the vehicle driving mode adjustment device includes:

[0037] a receiving module, configured to adjust the driving mode of the vehicle to a first target mode in response to a first adjustment instruction;

[0038] An adjustment module is used to determine the first target parameter of the first motor according to the first adjustment instruction, and adjust the output parameter of the first motor according to the first target mode and the first target parameter, wherein during the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, the output parameter is adjusted according to the second adjustment instruction and the second target mode, and the output parameter includes an output speed and an output torque.

[0039] In a third aspect, the present invention further provides an electronic device, comprising a memory and a processor;

[0040] The memory is used to store computer programs;

[0041] The processor is used to implement the vehicle driving mode adjustment method as described above when executing the computer program. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic flow chart of a vehicle driving mode adjustment method according to an embodiment of the present invention;

[0043] Figure 2 It is a schematic diagram of a detailed flow chart of step S200 of the vehicle driving mode adjustment method according to an embodiment of the present invention;

[0044] Figure 3 It is a schematic diagram of a detailed flow chart of step S230 of the vehicle driving mode adjustment method according to an embodiment of the present invention;

[0045] Figure 4Another flowchart diagram of the vehicle driving mode adjustment method after step S200 is refined according to an embodiment of the present invention;

[0046] Figure 5 It is another flowchart diagram after the step S200 of the vehicle driving mode adjustment method according to the embodiment of the present invention is refined;

[0047] Figure 6 is a flowchart of a vehicle driving mode adjustment method according to an embodiment of the present invention;

[0048] Figure 7 An example diagram of a vehicle power system architecture of a vehicle driving mode adjustment method according to an embodiment of the present invention;

[0049] Figure 8 An exemplary diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0051] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0052] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0053] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0054] like Figure 1 As shown, an embodiment of the present invention provides a vehicle driving mode adjustment method, which is applied to a hybrid vehicle, wherein the hybrid vehicle includes an internal combustion engine and a first motor drivingly connected to the internal combustion engine, and the vehicle driving mode adjustment method includes:

[0055] Step S100 , in response to a first adjustment instruction, adjusting the driving mode of the vehicle to a first target mode.

[0056] In one embodiment, the hybrid vehicle includes at least two types of driving devices, such as a vehicle combining an internal combustion engine and an electric motor, a vehicle combining a fuel cell and an electric motor, or a vehicle combining solar energy and an electric motor. When the hybrid vehicle is driven by an internal combustion engine and an electric motor, it has multiple driving modes, such as a pure electric mode driven entirely by an electric motor, a series mode driven by an electric motor through the internal combustion engine, and a parallel mode driven by both the internal combustion engine and the electric motor. Under certain working conditions, a specific driving mode can be used to make the vehicle more economical; under other working conditions, a specific driving mode can be used to make the vehicle more powerful. Therefore, when the vehicle is driving, the vehicle needs to suddenly switch the driving mode at a certain moment to adapt to the current environment for different working conditions and the driver's driving intentions.

[0057] like Figure 6 As shown, in one embodiment, the driving device of the hybrid vehicle is composed of an internal combustion engine and an electric motor, and the driving device includes a first electric motor, a second electric motor, a clutch, a transmission, an internal combustion engine and a power battery. In this embodiment, the first electric motor is connected to the internal combustion engine, used to drive the internal combustion engine, or driven by the internal combustion engine to generate electricity, and can also be used to directly drive the vehicle to travel; the second electric motor is connected to the transmission and the wheels, used to directly drive the vehicle to travel, and can also be driven by the internal combustion engine to generate electricity after the clutch is locked; the power battery is electrically connected to the first electric motor and the second electric motor, used to supply power to the first electric motor and the second electric motor, and can also store electric energy when the internal combustion engine drives the first electric motor or the second electric motor to generate electricity; the transmission is connected to the clutch and the second electric motor respectively, used to distribute the torque from the first electric motor, the second electric motor or the internal combustion engine when the clutch is locked. Among them, the first electric motor and the second electric motor are not limited to the current hybrid vehicle architecture, and the first electric motor and the second electric motor are configured as a P1+P3 hybrid configuration; in other embodiments, the first electric motor and the second electric motor are configured as a P1+P2 hybrid configuration; in other embodiments, the first electric motor and the second electric motor can also be configured as other power configurations.

[0058] In some embodiments, the first motor is used to drive the internal combustion engine to make the internal combustion engine speed higher than the idle speed, or to be driven by the internal combustion engine to generate electricity; the second motor is used to drive the vehicle. In other embodiments, the first motor and the second motor can both drive the internal combustion engine or be driven by the internal combustion engine to generate electricity, or can be used as drive motors to drive the vehicle alone.

[0059] When the first adjustment instruction is received, it means that the output parameters of the motor need to be changed under the current working condition of the vehicle, and the driving mode of the vehicle is adjusted to the first target mode indicated by the first adjustment instruction. For example, when the first target mode indicated by the first adjustment instruction is the pure electric mode, the driving mode of the vehicle is adjusted to the pure electric mode, and one of the motors in the vehicle is driven to travel; when the first target mode is the parallel mode, the driving mode of the vehicle is adjusted to the parallel mode, and the output parameters of the motor are matched with the parallel mode.

[0060] Step S200, determining the first target parameter of the first motor according to the first adjustment instruction, and adjusting the output parameter of the first motor according to the first target mode and the first target parameter, wherein, in the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, the output parameter is adjusted according to the second adjustment instruction and the second target mode, the output parameters including output speed and output torque, and the first motor is used to be connected to an internal combustion engine drive.

[0061] The first target parameter of the first motor is determined according to the first adjustment instruction. In this embodiment, the first target parameter represents the target output speed and target output torque to be output by the first motor corresponding to the first adjustment instruction. When the output speed and output torque of the first motor are consistent with the first target parameter, it indicates that the driving mode of the vehicle is adjusted successfully.

[0062] In one embodiment, when the current driving mode of the vehicle is the same as the first target mode indicated by the first adjustment instruction, the first target parameter included in the first adjustment instruction may also change. In this case, the target parameter of the first motor still needs to be determined according to the first adjustment instruction so that the output parameter of the first motor meets the driver's expectations / matches the current working condition.

[0063] The first motor is responsible for adjusting the output parameters, benefiting from the inherent high-speed response characteristics and excellent control accuracy of the motor, ensuring that when the mode is switched, the first motor can accurately and quickly respond to the changing target parameters. At the moment of driving mode switching, even if the first motor is in the process of speed adjustment or torque adjustment, it can still smoothly transition to the new target mode through a new adjustment instruction (second adjustment instruction). Ensure the continuity of the driving experience. For example, when adjusting from series mode to parallel mode, if a second adjustment instruction is received, and the second target mode indicated by the second adjustment instruction is still parallel mode, if the first motor is currently adjusting the speed, the second target speed is determined according to the second adjustment instruction, and the speed is adjusted according to the second target speed until the speed adjustment is completed. If the second motor is currently adjusting the torque, the second target torque is determined according to the second adjustment instruction until the torque adjustment is completed. When adjusting from the parallel mode to the series mode, if a second adjustment instruction is received, and the second target mode indicated by the second adjustment instruction is still the series mode, if the first motor is currently adjusting the speed, the second target speed is determined according to the second adjustment instruction, and the speed is adjusted according to the second target speed until the speed adjustment is completed. If the second motor is currently adjusting the torque, the second target torque is determined according to the second adjustment instruction until the torque adjustment is completed.

[0064] In some embodiments, it takes a certain amount of time to adjust the output parameter of the first motor through the first target parameter. For example, the current motor speed is 3000r / min, and the target output speed is 8000r / min. Under ideal conditions, it takes several seconds for the motor speed to rise. Due to the variability of working conditions and the change of driver's intention, the driving mode is often switched during the process of the motor speed rising. Once the second adjustment instruction is received during this period, the second target parameter of the first motor is determined according to the second adjustment instruction, and the output parameter of the first motor is adjusted according to the second target mode indicated by the second adjustment instruction to meet the variable mode switching requirements.

[0065] Alternatively, if Figure 2 As shown, adjusting the output parameter according to the second adjustment instruction and the second target mode includes:

[0066] Step S210: when the first target mode and the second target mode are different, determining a second target parameter of the first motor according to the second adjustment instruction.

[0067] Step S220, obtaining current parameters of the first motor.

[0068] Step S230: adjusting the current parameter to the second target parameter.

[0069] In one embodiment, when the first target mode and the second target mode are different, it indicates that it is necessary to switch to a drive mode that is more suitable for the current working conditions. The speed and torque to be output by the first motor are determined according to the second adjustment instruction. The current parameters of the first motor at the current moment are obtained, and the current parameters are adjusted to the second target parameters to meet the output requirements of the switched drive mode. For example, the current parameters including the current speed and the current torque are obtained. When the current torque and the second target torque in the second target parameter are consistent, the torque value is not changed, and only the current speed that is different from the second target speed is changed. After obtaining the second adjustment instruction, the current parameters of the first motor are immediately adjusted to the second target parameters, and only the different parameters are adjusted, which can meet the frequent switching of the vehicle drive mode and ensure the switching speed of the drive mode.

[0070] When the first target mode and the second target mode are the same, the second target parameters of the first motor are determined according to the second adjustment instruction, and the parameters of the first motor are adjusted according to the adjustment sequence corresponding to the second target mode, specifically including obtaining the current parameters of the first motor, and adjusting the current parameters to the second target parameters according to the adjustment sequence.

[0071] Alternatively, if Figure 3 As shown, adjusting the current parameter to the second target parameter includes:

[0072] Step S231, determining the current mode of the vehicle, and determining the adjustment order of the output parameters according to the current mode.

[0073] Step S232, determining the current adjustment stage of the first motor.

[0074] Step S233: When the second adjustment instruction is received, the current adjustment phase is used as an initial phase, and the current parameter is adjusted to the second target parameter.

[0075] In one embodiment, different driving modes have different adjustment orders. For example, in a vehicle with a hybrid architecture composed of an internal combustion engine and an electric motor, the parallel mode requires coupling the internal combustion engine and the electric motor to jointly drive the vehicle. In this process, the speed of the internal combustion engine needs to be adjusted to a better speed by the electric motor to meet the output characteristics of the internal combustion engine; then the output torque of the electric motor is adjusted to match the torque required to drive the vehicle. In this embodiment, when the vehicle needs to switch the driving mode to the series mode, the internal combustion engine and the electric motor need to be decoupled, and the vehicle is driven by the electric motor, by first offsetting the torque output to the wheels by the internal combustion engine, and then adjusting the output speed of the electric motor so that the speed of the internal combustion engine meets the power generation demand. Therefore, the current driving mode of the vehicle is determined, and the adjustment order of the output parameters is determined according to the current mode. Then, when the second adjustment instruction is received, according to the current adjustment stage of the first motor, the adjustment stage of the original mode is exited, and the second target mode indicated by the second adjustment instruction is consistent, and the output parameters of the first motor are adjusted according to the adjustment order of the second target mode. Among them, the second target parameters include the second target torque and the second target speed.

[0076] Optionally, the current adjustment stage includes a speed adjustment stage and a torque adjustment stage, and when the second adjustment instruction is received, taking the current adjustment stage as the initial stage, adjusting the current parameter to the second target parameter includes:

[0077] When the current adjustment stage is the speed adjustment stage, the output speed is adjusted according to the second target parameter, and the output parameter is adjusted according to a preset adjustment sequence until the driving mode is adjusted to the second target mode.

[0078] When the current adjustment stage is the torque adjustment stage, the output torque is adjusted according to the second target parameter, and the output parameter is adjusted according to the preset adjustment sequence until the driving mode is adjusted to the second target mode.

[0079] For example, Figure 7As shown, when the first target mode is the series mode and the second target mode is the parallel mode, the second target parameter is determined by the second adjustment instruction, and the output parameter of the first motor is adjusted according to the adjustment sequence corresponding to the parallel mode, that is, by adjusting the motor speed first and then adjusting the motor torque. After determining the second target parameter and the adjustment sequence, the adjustment stage of the first motor at the current moment is determined. For example, at the last moment (the moment when the first adjustment instruction is received), the vehicle switches from the parallel mode to the series mode, and the first motor is adjusting the output parameter according to the first target parameter. When the second adjustment instruction is received, the output torque is being adjusted according to the first target torque. Then the current adjustment stage of step S232 is the torque adjustment stage. Exit the original adjustment process and readjust the output torque of the first motor according to the second target torque. According to the adjustment sequence of the series switching parallel mode, when the output torque is consistent with the second target torque, the clutch is engaged, and the torque of the first motor is further adjusted to unload the charging torque of the first motor, so that the internal combustion engine torque is loaded to the wheels, and the switching of the drive mode is completed. In other cases, when it is determined that the current adjustment stage of step S232 is the speed adjustment stage, the original adjustment process is exited, and the output speed of the first motor is readjusted according to the second target speed. According to the adjustment sequence of series switching to parallel, when the output speed is consistent with the second target speed, the drive mode switching is completed.

[0080] Optionally, the first target mode includes a series mode and a parallel mode, and adjusting the output parameter of the first motor according to the first target mode and the first target parameter includes:

[0081] When the first target mode is the series mode, adjusting the output parameters according to a first order;

[0082] When the first target mode is the parallel mode, the output parameter is adjusted according to a second sequence, wherein the first sequence is opposite to the second sequence.

[0083] Optionally, the second target mode includes a series mode and a parallel mode, and adjusting the output parameter according to the second adjustment instruction and the second target mode includes:

[0084] When the second target mode is the series mode, adjusting the output parameter according to the first order;

[0085] When the second target mode is the parallel mode, the output parameter is adjusted according to a second sequence, wherein the first sequence is opposite to the second sequence.

[0086] Alternatively, if Figure 4 and Figure 7 As shown, when the first target mode is the series mode, adjusting the output parameters according to the first order includes:

[0087] Step S240: when the first target mode is the series mode, adjusting the power generation torque of the first motor to the series torque.

[0088] Step S241, disengage the clutch.

[0089] Step S242, adjusting the rotation speed of the first motor to a series rotation speed.

[0090] In one embodiment, when the first target mode is the series mode, the generating torque of the first motor is adjusted to the series torque, that is, the torque outputted by the internal combustion engine to the wheel end is unloaded by loading the charging torque of the first motor; when the torque is unloaded and completely disengaged, the clutch is disengaged, and during this period, the clutch locking torque is unloaded and completely disengaged in a short time; after the clutch is disengaged, the speed of the first motor is adjusted to drive the speed of the internal combustion engine, and the speed of the internal combustion engine is adjusted from other speeds to the series speed. Among them, in step S200, the adjustment process of the second target mode is the same as that of the first target mode, which will not be repeated here.

[0091] In series drive mode, the clutch is disengaged to achieve decoupling between the internal combustion engine and the wheels. At this time, the second motor assumes the task of propulsion of the vehicle and performs the energy recovery function, recovering kinetic energy during vehicle braking. At the same time, the state of charge of the power battery is monitored, and the charging power of the first motor is dynamically adjusted based on this information, aiming to maintain the balance of the battery charge level, ensuring that the energy storage requirements are met without affecting the output of the necessary driving force of the second motor, thereby achieving an optimal balance between driving efficiency and energy management.

[0092] Alternatively, if Figure 5 and Figure 7 As shown, when the first target mode is the parallel mode, adjusting the output parameters according to the second sequence includes:

[0093] Step S250: when the first target mode is the parallel mode, adjusting the speed of the first motor to a parallel speed.

[0094] Step S251, engaging the clutch.

[0095] Step S252, adjusting the generating torque of the first motor to the parallel torque.

[0096] In one embodiment, when the first target mode is the parallel mode, the speed of the first motor is adjusted to the parallel speed, that is, the speed of the first motor drives the internal combustion engine to adjust from the series speed to the parallel speed; after the speed adjustment is completed, the clutch is engaged to complete the torque establishment and lock the clutch; after the clutch is engaged, the charging torque of the first motor is unloaded, so that the torque of the internal combustion engine is loaded to the wheels, and the parallel mode switching is completed. Among them, in step S200, the adjustment process of the second target mode is the same as that of the first target mode, which will not be repeated here.

[0097] In one embodiment, in the parallel drive mode, the clutch is engaged, thereby achieving a direct correlation between the speed of the internal combustion engine and the movement of the wheels. In this mode, the second motor works in conjunction with the internal combustion engine to provide driving force for the vehicle. Among them, the internal combustion engine plays the role of driving force, while the second motor plays the function of a regulator, flexibly adjusting its torque output according to the driver's immediate needs and the charge state of the power battery. Specifically, the second motor can not only consume the electrical energy of the power battery as needed to increase the driving torque, but also intervene in regulating the torque transmitted by the internal combustion engine to the wheels to optimize the overall power output. In the parallel drive state, unless there are special circumstances, the first motor does not participate in the torque output process, its torque remains at zero, and the speed is dynamically adjusted with the vehicle's driving speed, aiming to maintain system efficiency and stability.

[0098] Through the inherent advantages of the motor, when the mode is switched, no matter which stage the first motor is in, the speed or torque of the first motor can be adjusted based on the new target parameters to complete the mode switching, and the second motor cooperates with the first motor to complete the vehicle drive mode switching. For example, in the speed adjustment process from parallel to series, the target drive mode is series. At this time, the first motor is controlled to exit the parallel speed adjustment process and enter the series speed adjustment process to adjust the speed of the internal combustion engine to the series speed. In this process, the clutch is in a disengaged state, and the speed change of the internal combustion engine and the torque change of the first motor will not be transmitted to the wheels, that is, there will be no torque or speed mutation, and it will not cause the vehicle's drivability problems. The speed adjustment process from parallel to series is the same as it. The first motor is controlled to exit the parallel torque adjustment process and enter the series torque adjustment process to offset the torque output to the wheels by the internal combustion engine, and the clutch is separated according to the adjustment sequence. After the torque is released, the speed of the first motor is adjusted to adjust the speed of the internal combustion engine to the series speed, completing the rapid switching of the drive mode.

[0099] During the torque adjustment process from series to parallel, when the generating torque of the first motor is being unloaded, the target mode is changed to the series mode. At this time, the first motor is adjusted to the corresponding charging torque according to the current torque of the internal combustion engine. After the torque of the internal combustion engine is completely offset, the clutch is disengaged and the speed of the first motor is adjusted so that the speed of the internal combustion engine reaches the series speed, and the series mode is entered. The speed adjustment process from series to parallel is similar. The first motor exits the original adjustment mode and enters the series mode. The speed of the internal combustion engine is adjusted to the parallel speed according to the speed of the first motor. The clutch is engaged and the torque of the first motor is adjusted so that the torque of the internal combustion engine is output to the wheels to complete the parallel drive.

[0100] During the speed adjustment stage of the internal combustion engine, the clutch does not form effective torque transmission. At this time, the speed and torque fluctuations of the internal combustion engine and the first motor are isolated from the wheels, avoiding adverse interference with the vehicle's driving smoothness and power responsiveness. Therefore, in the speed adjustment link during the series-parallel mode conversion process, the drive mode conversion can be implemented directly. During this period, the first motor is responsible for adjusting the speed of the internal combustion engine from the current level to the speed value required by the target mode. Fortunately, due to the advantages of the gearbox's multi-gear design, the ideal speed difference between the series and parallel modes is reduced, so the entire conversion process shows excellent noise levels, vibration and harshness (NVH) performance and a shorter switching time.

[0101] In the torque adjustment phase, the clutch torque has been established and locked, and the first motor matches the torque of the second motor to accurately adjust the loading or unloading of the internal combustion engine torque to the wheels. Once the adjustment command is received, the first motor immediately starts the switching of the target torque. After the switching is completed, the subsequent series-parallel mode conversion steps are seamlessly connected. Thanks to the high precision and fast response of the motor in torque control, the smoothness of the entire mode switching process and the sensitivity of the power response are ensured to be maintained at a high level.

[0102] Optionally, before adjusting the driving mode of the vehicle to the first target mode in response to the first adjustment instruction, the method further includes:

[0103] The first target mode indicated by the first adjustment instruction is determined according to a vehicle state, wherein the vehicle state includes a state of charge, a driving speed, and a power target parameter.

[0104] When the state of charge is lower than a charge threshold and the driving speed is lower than a preset speed, the first target mode indicated by the first adjustment instruction is a series mode.

[0105] When the power target parameter is higher than a parameter threshold, the first target mode indicated by the first adjustment instruction is a parallel mode.

[0106] In one embodiment, the adjustment instruction is determined according to the driver's driving demand and the battery's charging and discharging demand. For example, when the vehicle is in a high charge state and is traveling at a low uniform speed, its driving demand is small and the battery's discharge power is sufficient to drive the vehicle, then the internal combustion engine and the first motor do not need to work, and the driving mode is a pure electric mode. When the vehicle is in a low charge state and is traveling at a low uniform speed, its driving torque demand is small, but the charge state needs to maintain a certain balance. At this time, the internal combustion engine is started to drive the first motor to generate electricity, and the driving mode is a series mode. After the clutch is engaged, when the speed is lower than the idle speed of the internal combustion engine or the speed of the internal combustion engine is too low, the vehicle is still driven by the series mode. When the vehicle is in a high-speed and high-torque demand condition, that is, the power target parameter is higher than the parameter threshold, and the second motor cannot meet the demand for driving the vehicle. The internal combustion engine and the second motor drive the vehicle together, and drive through the parallel mode. Among them, the power target parameter includes the target acceleration and the target driving torque.

[0107] A vehicle driving mode adjustment device provided by another embodiment of the present invention is applied to a hybrid vehicle, wherein the hybrid vehicle includes an internal combustion engine and a first motor drivingly connected to the internal combustion engine, and the vehicle driving mode adjustment device includes:

[0108] a receiving module, configured to adjust the driving mode of the vehicle to a first target mode in response to a first adjustment instruction;

[0109] An adjustment module is used to determine the first target parameter of the first motor according to the first adjustment instruction, and adjust the output parameter of the first motor according to the first target mode and the first target parameter, wherein during the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, the output parameter is adjusted according to the second adjustment instruction and the second target mode, and the output parameter includes an output speed and an output torque.

[0110] like Figure 8 As shown, another embodiment of the present invention provides an electronic device 800, including a memory 802 and a processor 801; the memory 802 is used to store a computer program; the processor 801 is used to implement the vehicle driving mode adjustment method as described above when executing the computer program.

[0111] In other words, an electronic device 800 includes a memory 802 and a processor 801 coupled to the memory 802; the memory 802 is configured to store a computer program; and the processor 801 is configured to perform the following operations when executing the computer program:

[0112] In response to the first adjustment instruction, adjusting the driving mode of the vehicle to a first target mode;

[0113] Determine a first target parameter of the first motor according to the first adjustment instruction, and adjust an output parameter of the first motor according to the first target mode and the first target parameter, wherein, during the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, adjust the output parameter according to the second adjustment instruction and the second target mode, the output parameters including output speed and output torque, and the first motor is used to be connected to an internal combustion engine drive.

[0114] A computer-readable storage medium provided in another embodiment of the present invention stores a computer program, and when the computer program is executed by a processor, the vehicle driving mode adjustment method as described above is implemented.

[0115] In other words, a non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor performs the following operations:

[0116] In response to the first adjustment instruction, adjusting the driving mode of the vehicle to a first target mode;

[0117] Determine a first target parameter of the first motor according to the first adjustment instruction, and adjust an output parameter of the first motor according to the first target mode and the first target parameter, wherein, during the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, adjust the output parameter according to the second adjustment instruction and the second target mode, the output parameters including output speed and output torque, and the first motor is used to be connected to an internal combustion engine drive.

[0118] An electronic device that can be used as a server or client of the present invention will now be described, which is an example of a hardware device that can be applied to various aspects of the present invention. Electronic devices are intended to represent electronic devices of various forms of digital electronics, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0119] The electronic device includes a computing unit, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) or a computer program loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for the operation of the device can also be stored. The computing unit, ROM and RAM are connected to each other through a bus. An input / output (I / O) interface is also connected to the bus.

[0120] A computer system may include clients and servers. Clients and servers are generally remote from each other and typically interact through a communication network. The relationship of client and server arises through computer programs running on the respective computers and having a client-server relationship to each other.

[0121] A person of ordinary skill in the art can understand that the implementation of all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc. In the present application, the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, which may be located in one place or distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention. In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0122] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A vehicle driving mode adjustment method, characterized in that: Applied to a hybrid vehicle, the hybrid vehicle includes an internal combustion engine and a first motor drivingly connected to the internal combustion engine, the vehicle driving mode adjustment method includes: In response to the first adjustment instruction, adjusting the driving mode of the vehicle to a first target mode; Determine the first target parameter of the first motor according to the first adjustment instruction, and adjust the output parameter of the first motor according to the first target mode and the first target parameter, wherein during the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, adjust the output parameter according to the second adjustment instruction and the second target mode, and the output parameter includes an output speed and an output torque.

2. The vehicle driving mode adjustment method according to claim 1, characterized in that: The adjusting the output parameter according to the second adjustment instruction and the second target mode comprises: When the first target mode and the second target mode are different, determining a second target parameter of the first motor according to the second adjustment instruction; Acquire current parameters of the first motor; The current parameter is adjusted to the second target parameter.

3. The vehicle driving mode adjustment method according to claim 2, characterized in that: The adjusting the current parameter to the second target parameter comprises: Determining a current mode of the vehicle, and determining an adjustment order of the output parameters according to the current mode; determining a current adjustment stage of the first motor; When the second adjustment instruction is received, the current parameter is adjusted to the second target parameter with the current adjustment stage as the initial stage.

4. The vehicle driving mode adjustment method according to claim 3, characterized in that: The current adjustment stage includes a speed adjustment stage and a torque adjustment stage. When the second adjustment instruction is received, taking the current adjustment stage as the initial stage, adjusting the current parameter to the second target parameter includes: When the current adjustment stage is the speed adjustment stage, adjusting the output speed according to the second target parameter, and adjusting the output parameter according to a preset adjustment sequence until the driving mode is adjusted to the second target mode; When the current adjustment stage is the torque adjustment stage, the output torque is adjusted according to the second target parameter, and the output parameter is adjusted according to the preset adjustment sequence until the driving mode is adjusted to the second target mode.

5. The vehicle driving mode adjustment method according to any one of claims 1 to 4, characterized in that: The first target mode includes a series mode and a parallel mode, and adjusting the output parameter of the first motor according to the first target mode and the first target parameter includes: When the first target mode is the series mode, adjusting the output parameters according to a first order; When the first target mode is the parallel mode, the output parameter is adjusted according to a second sequence, wherein the first sequence is opposite to the second sequence.

6. The vehicle driving mode adjustment method according to claim 5, characterized in that: When the first target mode is the series mode, adjusting the output parameters according to the first sequence includes: When the first target mode is the series mode, adjusting the power generation torque of the first motor to the series torque; Disengagement clutch; The speed of the first motor is adjusted to a series speed.

7. The vehicle driving mode adjustment method according to claim 5, characterized in that: When the first target mode is the parallel mode, adjusting the output parameters according to the second sequence includes: When the first target mode is the parallel mode, adjusting the speed of the first motor to a parallel speed; Combine the clutch; The generating torque of the first motor is adjusted to the parallel torque.

8. The vehicle driving mode adjustment method according to any one of claims 1 to 4, characterized in that: Before adjusting the driving mode of the vehicle to the first target mode in response to the first adjustment instruction, the method further includes: Determining the first target mode indicated by the first adjustment instruction according to a vehicle state, wherein the vehicle state includes a state of charge, a driving speed, and a power target parameter; When the state of charge is lower than a charge threshold and the driving speed is lower than a preset speed, the first target mode indicated by the first adjustment instruction is a series mode; When the power target parameter is higher than a parameter threshold, the first target mode indicated by the first adjustment instruction is a parallel mode.

9. A vehicle driving mode adjustment device, characterized in that: Applied to a hybrid vehicle, the hybrid vehicle includes an internal combustion engine and a first motor drivingly connected to the internal combustion engine, the vehicle driving mode adjustment device includes: a receiving module, configured to adjust the driving mode of the vehicle to a first target mode in response to a first adjustment instruction; An adjustment module is used to determine the first target parameter of the first motor according to the first adjustment instruction, and adjust the output parameter of the first motor according to the first target mode and the first target parameter, wherein during the process of adjusting the output parameter according to the first target mode and the first target parameter, if a second adjustment instruction is received, the output parameter is adjusted according to the second adjustment instruction and the second target mode, and the output parameter includes an output speed and an output torque.

10. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is used to implement the vehicle driving mode adjustment method as described in any one of claims 1-8 when executing the computer program.

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