Vehicle power mode switching method, device, equipment and readable storage medium

Abstract

A vehicle power mode switching method, device, equipment and readable storage medium, the vehicle power mode switching method includes: when the battery power is in a first power range, if the vehicle demand power is less than the optimal power output range of the engine, then switch to a pure motor output mode, if the vehicle demand power is in the optimal power output range of the engine, then switch to a pure engine output mode, if the vehicle demand power is greater than the optimal power output range of the engine, then switch to a motor and engine simultaneous output mode; when the battery power is in a second power range, if the vehicle demand power is less than or equal to the maximum output power of the motor, then switch to a pure motor output mode, if the vehicle demand power is greater than the maximum output power of the motor, then switch to a motor and engine simultaneous output mode. This application makes full use of the battery power and the optimal performance of the engine and the motor, so that the vehicle's power mode switching scheme can be more economical.

Description

Technical Field

[0001] The present application relates to the field of hybrid vehicle control technology, and in particular to a vehicle power mode switching method, device, equipment and readable storage medium. Background Art

[0002] The structural characteristics of hybrid vehicles, which are jointly driven by the engine and the motor, determine that the vehicle will be in different power modes for different working conditions, that is, the vehicle's power mode needs to be switched according to different working conditions. However, the current power mode switching scheme for hybrid vehicles is not economical enough. Summary of the invention

[0003] The present application provides a vehicle power mode switching method, device, equipment and readable storage medium, aiming to solve the current technical problem that the power mode switching scheme for hybrid vehicles is not economical enough.

[0004] In a first aspect, an embodiment of the present application provides a vehicle power mode switching method, the vehicle power mode switching method comprising:

[0005] Obtain the battery power of the vehicle and determine the power range of the battery power;

[0006] When the battery power is in the first power range, if the vehicle demand power is less than the optimal power output range of the engine, the vehicle's power mode is switched to a pure motor output mode; if the vehicle demand power is in the optimal power output range of the engine, the vehicle's power mode is switched to a pure engine output mode; if the vehicle demand power is greater than the optimal power output range of the engine, the vehicle's power mode is switched to a simultaneous motor and engine output mode;

[0007] When the battery power is in the second power range, if the vehicle demand power is less than or equal to the maximum output power of the motor, the vehicle power mode is switched to the pure motor output mode; if the vehicle demand power is greater than the maximum output power of the motor, the vehicle power mode is switched to the motor and engine simultaneous output mode;

[0008] Among them, when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the first power range, the engine is enabled to output at the maximum power within the optimal power output range; when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the second power range, the motor is enabled to output at the maximum output power, and the lower limit value of the second power range is higher than the upper limit value of the first power range.

[0009] Optionally, the vehicle power mode switching method further includes:

[0010] When the power mode of the vehicle is switched from a pure motor output mode to a pure engine output mode, or from a pure motor output mode to a motor and engine simultaneous output mode, a preset speed difference is determined according to the slope of the road on which the vehicle is traveling;

[0011] If the vehicle is traveling uphill, the clutch is controlled to engage when the engine speed is greater than the motor speed, the difference between the engine speed and the motor speed is less than the preset speed difference, and the motor speed is greater than the engine idle speed;

[0012] If the vehicle is traveling downhill, the clutch is controlled to engage when the engine speed is less than the motor speed, and the difference between the motor speed and the engine speed is less than the preset speed difference, and the engine speed is greater than the engine idle speed.

[0013] Optionally, the vehicle power mode switching method further includes:

[0014] When the vehicle's power mode is switched from pure motor output mode to pure engine output mode, the motor stops outputting power when the motor lifts the engine to the optimal power output range.

[0015] Optionally, the vehicle power mode switching method further includes:

[0016] In the process of switching the power mode of the vehicle from the pure engine output mode to the motor and engine simultaneous output mode, obtaining an increase value of the vehicle demand power;

[0017] The increase in the vehicle's required power is met by increasing the motor's output power;

[0018] When the absolute value of the difference between the target output power and the actual output power of the engine is smaller than the preset fluctuation value, the output power ratio of the motor and the engine is restored to a normal ratio.

[0019] Optionally, the vehicle power mode switching method further includes:

[0020] In the process of the vehicle's power mode switching from pure motor output mode to simultaneous motor and engine output mode, or from pure engine output mode to simultaneous motor and engine output mode, or from pure motor output mode to pure engine output mode, or from pure engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure engine output mode, the difference between the vehicle's required power and the actual output power of the engine is met by adjusting the motor output power.

[0021] Optionally, the vehicle power mode switching method further includes:

[0022] When the battery power level is in the third power range, the vehicle power mode is switched to a mode of pure engine output while charging the battery, and the output power of the air-conditioning compressor is reduced to a preset power;

[0023] When the battery power is in a fourth power range, the vehicle's power mode is switched to a pure engine output mode, the upper limit value of the fourth power range is lower than the lower limit value of the first power range, and the upper limit value of the third power range is lower than the lower limit value of the fourth power range.

[0024] In a second aspect, an embodiment of the present application provides a vehicle power mode switching device, the vehicle power mode switching device comprising:

[0025] An acquisition module is used to acquire the battery power of the vehicle and determine the power range of the battery power;

[0026] A first switching module is used for, when the battery power is in the first power range, if the vehicle demand power is less than the optimal power output range of the engine, switching the vehicle's power mode to a pure motor output mode; if the vehicle demand power is in the optimal power output range of the engine, switching the vehicle's power mode to a pure engine output mode; if the vehicle demand power is greater than the optimal power output range of the engine, switching the vehicle's power mode to a simultaneous motor and engine output mode;

[0027] A second switching module is used for, when the battery power is in the second power range, if the vehicle demand power is less than or equal to the maximum output power of the motor, switching the vehicle power mode to a pure motor output mode; if the vehicle demand power is greater than the maximum output power of the motor, switching the vehicle power mode to a simultaneous output mode of the motor and the engine;

[0028] Among them, when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the first power range, the engine is enabled to output at the maximum power within the optimal power output range; when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the second power range, the motor is enabled to output at the maximum output power, and the lower limit value of the second power range is higher than the upper limit value of the first power range.

[0029] Optionally, the vehicle power mode switching device further includes a third switching module, which is used to:

[0030] When the power mode of the vehicle is switched from a pure motor output mode to a pure engine output mode, or from a pure motor output mode to a motor and engine simultaneous output mode, a preset speed difference is determined according to the slope of the road on which the vehicle is traveling;

[0031] If the vehicle is traveling uphill, the clutch is controlled to engage when the engine speed is greater than the motor speed, the difference between the engine speed and the motor speed is less than the preset speed difference, and the motor speed is greater than the engine idle speed;

[0032] If the vehicle is traveling downhill, the clutch is controlled to engage when the engine speed is less than the motor speed, and the difference between the motor speed and the engine speed is less than the preset speed difference, and the engine speed is greater than the engine idle speed.

[0033] In the third aspect, an embodiment of the present application provides a vehicle power mode switching device, which includes a processor, a memory, and a vehicle power mode switching program stored in the memory and executable by the processor, wherein when the vehicle power mode switching program is executed by the processor, the steps of the vehicle power mode switching method described above are implemented.

[0034] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a vehicle power mode switching program is stored, wherein when the vehicle power mode switching program is executed by a processor, the steps of the vehicle power mode switching method as described above are implemented.

[0035] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0036] In an embodiment of the present application, the battery power of the vehicle is obtained, and the power range of the battery power is determined; when the battery power is in a first power range, if the vehicle demand power is less than the optimal power output range of the engine, the power mode of the vehicle is switched to a pure motor output mode, if the vehicle demand power is in the optimal power output range of the engine, the power mode of the vehicle is switched to a pure engine output mode, if the vehicle demand power is greater than the optimal power output range of the engine, the power mode of the vehicle is switched to a motor and engine simultaneous output mode; when the battery power is in a second power range, if the vehicle demand power is less than or equal to the maximum output power of the motor, the power mode of the vehicle is switched to a pure motor output mode, if the vehicle demand power is greater than the maximum output power of the motor, the power mode of the vehicle is switched to a motor and engine simultaneous output mode; wherein, when the power mode of the vehicle is a motor and engine simultaneous output mode and the battery power is in the first power range, the engine is made to output at the maximum power within the optimal power output range, and when the power mode of the vehicle is a motor and engine simultaneous output mode and the battery power is in the second power range, the motor is made to output at the maximum output power, and the lower limit value of the second power range is higher than the upper limit value of the first power range. The embodiments of the present application flexibly switch the vehicle's power mode to meet the vehicle's required power according to the battery power range, the engine's optimal power output range and the motor's maximum output power, thereby making full use of the battery power and the optimal performance of the engine and the motor, and making the vehicle's power mode switching solution more economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a flow chart of an embodiment of a vehicle power mode switching method of the present application;

[0038] Figure 2 A schematic diagram of a switching process flow of an embodiment of a vehicle power mode switching method of the present application;

[0039] Figure 3 Another schematic diagram of a process flow of an embodiment of a vehicle power mode switching method of the present application;

[0040] Figure 4 This is a functional module diagram of an embodiment of a vehicle power mode switching device of the present application;

[0041] Figure 5 This is a schematic diagram of the hardware structure of the vehicle power mode switching device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0044] In a first aspect, an embodiment of the present application provides a vehicle power mode switching method.

[0045] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of an embodiment of a vehicle power mode switching method of the present application. Figure 1 As shown, the vehicle power mode switching method includes:

[0046] Step S10, obtaining the battery power of the vehicle and determining the power range of the battery power.

[0047] In this embodiment, it is applied to hybrid vehicles, which generally include three power output modes: pure motor output mode, pure engine output mode and motor and engine simultaneous output mode. First, the battery power of the vehicle is obtained, and the power range of the battery power is determined, so as to adopt the corresponding vehicle power mode switching strategy according to the different power ranges of the battery power.

[0048] Step S20, when the battery power is in the first power range, if the vehicle demand power is less than the optimal power output range of the engine, the vehicle's power mode is switched to a pure motor output mode; if the vehicle demand power is in the optimal power output range of the engine, the vehicle's power mode is switched to a pure engine output mode; if the vehicle demand power is greater than the optimal power output range of the engine, the vehicle's power mode is switched to a simultaneous motor and engine output mode.

[0049] In this embodiment, when the battery power of the hybrid vehicle is in the first power range, the first power range is, for example, 35%-65%, the battery power is in a relatively sufficient state at this time. At this time, the best performance of the engine is mainly considered, that is, when the vehicle demand power has not reached the best power output range of the engine, the vehicle uses the pure motor output mode. The vehicle demand power refers to the demand power of the whole vehicle that the vehicle needs to meet, including the driver's throttle and air conditioning demand power, etc. When the vehicle demand power is in the best power output range of the engine, the vehicle uses the pure engine output mode. When the vehicle demand power is greater than the best power output range of the engine, the vehicle uses the motor and engine simultaneous output mode. In the first power range, when the vehicle uses the motor and engine simultaneous output mode, the engine is output at the maximum power within the best power output range. Therefore, when the battery power is in the first power range, whether it is the pure engine output mode or the motor and engine simultaneous output mode, the best performance of the engine can be fully exerted, which can make the vehicle's power mode switching scheme more economical.

[0050] Step S30, when the battery power is in the second power range, if the vehicle demand power is less than or equal to the maximum output power of the motor, the power mode of the vehicle is switched to the pure motor output mode; if the vehicle demand power is greater than the maximum output power of the motor, the power mode of the vehicle is switched to the motor and engine simultaneous output mode;

[0051] Among them, when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the first power range, the engine is enabled to output at the maximum power within the optimal power output range; when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the second power range, the motor is enabled to output at the maximum output power, and the lower limit value of the second power range is higher than the upper limit value of the first power range.

[0052] In this embodiment, when the battery power of the hybrid vehicle is in the second power range, the second power range is, for example, 65%-90%, the battery power is in the most sufficient state at this time. Since the economy of the battery is higher than that of the engine, in the second power range, the performance of the motor is fully utilized for output. Specifically, when the vehicle demand power is less than or equal to the maximum output power of the motor, the vehicle uses the pure motor output mode. When the vehicle demand power is greater than the maximum output power of the motor, the vehicle uses the motor and engine simultaneous output mode. In the second power range, when the vehicle uses the motor and engine simultaneous output mode, the motor is output at the maximum output power. In the second power range, by giving priority to the motor for output and exerting the maximum performance of the motor, the vehicle's power mode switching scheme can be made more economical.

[0053] In this embodiment, the hybrid vehicle generally includes three power output modes: a pure motor output mode, a pure engine output mode, and a motor and engine simultaneous output mode. The corresponding vehicle power mode switching strategy is adopted according to the different power intervals of the battery power. When the battery power of the hybrid vehicle is in the first power interval, the first power interval is, for example, 35%-65%, the best performance of the engine is mainly considered, and the vehicle power mode is flexibly switched according to the vehicle required power and the optimal power output interval of the engine. When the battery power is in the first power interval, whether it is a pure engine output mode or a motor and engine simultaneous output mode, the best performance of the engine can be fully utilized, which can make the vehicle power mode switching scheme more economical. When the battery power of the hybrid vehicle is in the second power interval, the second power interval is, for example, 65%-90%, the performance of the motor is fully utilized for output, and the vehicle power mode is flexibly switched according to the vehicle required power and the maximum output power of the motor. By giving priority to using the motor for output and exerting the maximum performance of the motor, the vehicle power mode switching scheme can also be more economical. By flexibly switching the vehicle's power mode according to the battery power range, the engine's optimal power output range and the motor's maximum output power to meet the vehicle's power requirements and fully utilizing the battery power and the engine and motor's optimal performance, the battery's charge and discharge times can be reduced and the battery life can be increased. By keeping the engine in the optimal working range more often and the battery power in the optimal range more often, the vehicle's energy consumption can be better reduced, making the vehicle's power mode switching solution more economical.

[0054] Further, in one embodiment, referring to Figure 2 , Figure 2 FIG. 1 is a schematic diagram of a switching process flow of an embodiment of a vehicle power mode switching method of the present application. Figure 2 As shown, the vehicle power mode switching method also includes:

[0055] Step S01, when the power mode of the vehicle is switched from the pure motor output mode to the pure engine output mode, or from the pure motor output mode to the motor and engine simultaneous output mode, a preset speed difference is determined according to the slope of the road on which the vehicle is traveling;

[0056] Step S02, if the vehicle is traveling uphill, when the engine speed is greater than the motor speed, and the difference between the engine speed and the motor speed is less than a preset speed difference, and the motor speed is greater than the engine idle speed, the clutch is controlled to engage;

[0057] Step S03, if the vehicle is traveling downhill, the clutch is controlled to engage when the engine speed is less than the motor speed, and the difference between the motor speed and the engine speed is less than the preset speed difference, and the engine speed is greater than the engine idle speed.

[0058] In this embodiment, it should be noted that when the vehicle uses the pure motor output mode, the vehicle's clutch is in a disengaged state, and when the vehicle uses the pure engine output mode or the motor and engine simultaneous output mode, the vehicle's clutch is in an engaged state. Therefore, when the vehicle's power mode is switched from the pure motor output mode to the pure engine output mode, or from the pure motor output mode to the motor and engine simultaneous output mode, the clutch engagement process is involved. In order to improve the smoothness of the vehicle's power mode switching process and avoid damage to the clutch due to a large difference between the engine speed and the motor speed, the clutch should be engaged as much as possible when the engine speed and the motor speed are consistent. The clutch is engaged, which is specifically divided into two different situations: uphill driving and downhill driving. When the vehicle is driving uphill, the engine speed is higher than the motor speed and the clutch is engaged. When the vehicle is driving downhill, the engine speed is lower than the motor speed and the clutch is engaged. The greater the slope, the greater the preset speed difference. The preset speed difference can be determined by the following formula: preset speed difference = 50*slope coefficient. The slope coefficient can be calibrated according to the slope size. The range of the slope coefficient is between 0 and 1, so that the vehicle can switch the power mode when driving on different slopes with better smoothness and better protect the clutch from damage.

[0059] Furthermore, in one embodiment, the vehicle power mode switching method further includes:

[0060] When the vehicle's power mode is switched from pure motor output mode to pure engine output mode, the motor stops outputting power when the motor lifts the engine to the optimal power output range.

[0061] In this embodiment, when the vehicle's power mode is switched from a pure motor output mode to a pure engine output mode, it involves the process of the motor lifting the engine and the motor stopping output. When the motor lifts the engine to the optimal power output range, the motor output power is stopped, which can improve the smoothness of the vehicle's power mode switching process and improve fuel economy.

[0062] Furthermore, in one embodiment, the vehicle power mode switching method further includes:

[0063] In the process of switching the power mode of the vehicle from the pure engine output mode to the motor and engine simultaneous output mode, obtaining an increase value of the vehicle demand power;

[0064] The increase in the vehicle's required power is met by increasing the motor's output power;

[0065] When the absolute value of the difference between the target output power and the actual output power of the engine is smaller than the preset fluctuation value, the output power ratio of the motor and the engine is restored to a normal ratio.

[0066] In this embodiment, when the power mode of the vehicle is switched from the pure engine output mode to the motor and engine simultaneous output mode, it is usually the case that the vehicle's power demand increases. At this time, the vehicle has a large power demand. First, the increase in the vehicle's power demand is obtained. Since the response time of the engine is usually about 1 second slower than the response time of the motor, and the motor usually responds in milliseconds, the motor's fast response characteristics are utilized to increase the motor output power to quickly meet the increase in the vehicle's power demand. This can improve the vehicle's power and ensure the vehicle's acceleration capability. At the same time, it can also make the engine more in a steady-state operating condition. When the absolute value of the difference between the target output power and the actual output power of the engine is less than the preset fluctuation value, for example, when the difference between the target output power and the actual output power of the engine is within ±3%, it means that the engine's response has entered a stable state. At this time, the output power ratio of the motor and the engine is restored to the normal ratio, which is the normal output power ratio of the motor and the engine in the motor and engine simultaneous output mode.

[0067] Furthermore, in one embodiment, the vehicle power mode switching method further includes:

[0068] In the process of the vehicle's power mode switching from pure motor output mode to simultaneous motor and engine output mode, or from pure engine output mode to simultaneous motor and engine output mode, or from pure motor output mode to pure engine output mode, or from pure engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure engine output mode, the difference between the vehicle's required power and the actual output power of the engine is met by adjusting the motor output power.

[0069] In this embodiment, the motor's fast response characteristic is also utilized. During the switching of various vehicle power modes, the motor is used to quickly respond to the difference between the vehicle's required power and the engine's actual output power. This process can be closed-loop controlled using control methods such as PID to avoid insufficient or excessive vehicle power due to slow engine response and power mode switching during the switching of vehicle power modes, thereby making the vehicle power mode switching process smoother.

[0070] Further, in one embodiment, referring to Figure 3 , Figure 3 Another flowchart of an embodiment of the vehicle power mode switching method of the present application is shown in FIG. Figure 3 As shown, the vehicle power mode switching method also includes:

[0071] Step S40, when the battery power is in the third power range, switching the vehicle power mode to a mode of pure engine output while charging the battery, and reducing the output power of the air-conditioning compressor to a preset power;

[0072] Step S50, when the battery power is in the fourth power interval, the vehicle power mode is switched to the pure engine output mode, the upper limit value of the fourth power interval is lower than the lower limit value of the first power interval, and the upper limit value of the third power interval is lower than the lower limit value of the fourth power interval.

[0073] In this embodiment, when the battery power is in the third power interval, such as 15-25%, the battery power is at its lowest state at this time. The power output of the engine is used to charge the battery in addition to meeting the power demand of the vehicle. The output power of the air-conditioning compressor is controlled to be reduced to a preset power, such as 50% of the rated power, to avoid affecting the charging of the battery. When the battery power is in the fourth power interval, such as 25-35%, the battery power is at a lower state at this time, and the pure engine output mode is used preferentially. Through the division of the first, second, third and fourth power intervals, according to the power interval of the battery power, the optimal power output interval of the engine and the maximum output power of the motor, the power mode of the vehicle is flexibly switched to meet the power demand of the vehicle, and the battery power, the optimal performance of the engine and the motor are fully utilized, so that the power mode switching scheme of the vehicle can be made more economical.

[0074] In a second aspect, an embodiment of the present application also provides a vehicle power mode switching device.

[0075] In one embodiment, referring to Figure 4 , Figure 4 This is a functional module diagram of an embodiment of a vehicle power mode switching device of the present application, such as Figure 4 As shown, the vehicle power mode switching device includes:

[0076] The acquisition module 10 is used to acquire the battery power of the vehicle and determine the power range of the battery power;

[0077] The first switching module 20 is used for, when the battery power is in the first power range, if the vehicle demand power is less than the optimal power output range of the engine, switching the vehicle power mode to the pure motor output mode; if the vehicle demand power is in the optimal power output range of the engine, switching the vehicle power mode to the pure engine output mode; if the vehicle demand power is greater than the optimal power output range of the engine, switching the vehicle power mode to the motor and engine simultaneous output mode;

[0078] The second switching module 30 is used for switching the power mode of the vehicle to a pure motor output mode when the battery power is in the second power range and if the vehicle demand power is less than or equal to the maximum output power of the motor, and switching the power mode of the vehicle to a simultaneous output mode of the motor and the engine when the vehicle demand power is greater than the maximum output power of the motor;

[0079] Among them, when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the first power range, the engine is enabled to output at the maximum power within the optimal power output range; when the power mode of the vehicle is the simultaneous output mode of the motor and the engine and the battery power is in the second power range, the motor is enabled to output at the maximum output power, and the lower limit value of the second power range is higher than the upper limit value of the first power range.

[0080] Furthermore, in one embodiment, the vehicle power mode switching device further includes a third switching module, which is used to:

[0081] When the power mode of the vehicle is switched from a pure motor output mode to a pure engine output mode, or from a pure motor output mode to a motor and engine simultaneous output mode, a preset speed difference is determined according to the slope of the road on which the vehicle is traveling;

[0082] If the vehicle is traveling uphill, the clutch is controlled to engage when the engine speed is greater than the motor speed, the difference between the engine speed and the motor speed is less than the preset speed difference, and the motor speed is greater than the engine idle speed;

[0083] If the vehicle is traveling downhill, the clutch is controlled to engage when the engine speed is less than the motor speed, and the difference between the motor speed and the engine speed is less than the preset speed difference, and the engine speed is greater than the engine idle speed.

[0084] Furthermore, in one embodiment, the vehicle power mode switching device further includes a fourth switching module, which is used to:

[0085] When the vehicle's power mode is switched from pure motor output mode to pure engine output mode, the motor stops outputting power when the motor lifts the engine to the optimal power output range.

[0086] Furthermore, in one embodiment, the vehicle power mode switching device further includes a fifth switching module, which is used to:

[0087] In the process of switching the power mode of the vehicle from the pure engine output mode to the motor and engine simultaneous output mode, obtaining an increase value of the vehicle demand power;

[0088] The increase in the vehicle's required power is met by increasing the motor's output power;

[0089] When the absolute value of the difference between the target output power and the actual output power of the engine is smaller than the preset fluctuation value, the output power ratio of the motor and the engine is restored to a normal ratio.

[0090] Furthermore, in one embodiment, the vehicle power mode switching device further includes a sixth switching module, which is used to:

[0091] In the process of the vehicle's power mode switching from pure motor output mode to simultaneous motor and engine output mode, or from pure engine output mode to simultaneous motor and engine output mode, or from pure motor output mode to pure engine output mode, or from pure engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure engine output mode, the difference between the vehicle's required power and the actual output power of the engine is met by adjusting the motor output power.

[0092] Furthermore, in one embodiment, the vehicle power mode switching device further includes a seventh switching module, which is used to:

[0093] When the battery power level is in the third power range, the vehicle power mode is switched to a mode of pure engine output while charging the battery, and the output power of the air-conditioning compressor is reduced to a preset power;

[0094] When the battery power is in a fourth power range, the vehicle's power mode is switched to a pure engine output mode, the upper limit value of the fourth power range is lower than the lower limit value of the first power range, and the upper limit value of the third power range is lower than the lower limit value of the fourth power range.

[0095] Among them, the functional implementation of each module in the above-mentioned vehicle power mode switching device corresponds to the various steps in the above-mentioned vehicle power mode switching method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0096] In a third aspect, an embodiment of the present application provides a vehicle power mode switching device.

[0097] Reference Figure 5 , Figure 5Schematic diagram of the hardware structure of the vehicle power mode switching device involved in the embodiment of the present application. In the embodiment of the present application, the vehicle power mode switching device may include a processor, a memory, a communication interface and a communication bus.

[0098] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0099] The communication interface includes an input / output (I / O) interface, a physical interface, and a logical interface, etc., which are used to interconnect the devices inside the vehicle power mode switching device, and an interface used to interconnect the vehicle power mode switching device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0100] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0101] The processor may be a general-purpose processor, and the general-purpose processor may call the vehicle power mode switching program stored in the memory and execute the vehicle power mode switching method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the vehicle power mode switching program is called may refer to the various embodiments of the vehicle power mode switching method of the present application, and will not be repeated here.

[0102] Those skilled in the art will understand that Figure 5 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0103] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0104] A vehicle power mode switching program is stored on a readable storage medium of the present application, wherein when the vehicle power mode switching program is executed by a processor, the steps of the vehicle power mode switching method as described above are implemented.

[0105] Among them, the method implemented when the vehicle power mode switching program is executed can refer to the various embodiments of the vehicle power mode switching method of the present application, and will not be repeated here.

[0106] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0107] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0108] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0109] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0110] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0111] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0112] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vehicle power mode switching method, characterized in that: The vehicle power mode switching method comprises: Obtain the battery power of the vehicle and determine the power range of the battery power; When the battery power is in the first power range, if the vehicle demand power is less than the optimal power output range of the engine, the vehicle's power mode is switched to a pure motor output mode; if the vehicle demand power is in the optimal power output range of the engine, the vehicle's power mode is switched to a pure engine output mode; if the vehicle demand power is greater than the optimal power output range of the engine, the vehicle's power mode is switched to a simultaneous motor and engine output mode; When the battery power is in the second power range, if the vehicle demand power is less than or equal to the maximum output power of the motor, the vehicle power mode is switched to the pure motor output mode; if the vehicle demand power is greater than the maximum output power of the motor, the vehicle power mode is switched to the motor and engine simultaneous output mode; Wherein, when the power mode of the vehicle is the motor and engine simultaneous output mode and the battery power is in the first power range, the engine is made to output at the maximum power within the optimal power output range; when the power mode of the vehicle is the motor and engine simultaneous output mode and the battery power is in the second power range, the motor is made to output at the maximum output power, and the lower limit value of the second power range is higher than the upper limit value of the first power range; Also includes: When the power mode of the vehicle is switched from a pure motor output mode to a pure engine output mode, or from a pure motor output mode to a motor and engine simultaneous output mode, a preset speed difference is determined according to the slope of the road on which the vehicle is traveling; If the vehicle is traveling uphill, the clutch is controlled to engage when the engine speed is greater than the motor speed, the difference between the engine speed and the motor speed is less than the preset speed difference, and the motor speed is greater than the engine idle speed; If the vehicle is traveling downhill, the clutch is controlled to engage when the engine speed is less than the motor speed, the difference between the motor speed and the engine speed is less than the preset speed difference, and the engine speed is greater than the engine idle speed; Also includes: When the battery power level is in the third power range, the vehicle power mode is switched to a mode of pure engine output while charging the battery, and the output power of the air-conditioning compressor is reduced to a preset power; When the battery power is in a fourth power range, the vehicle's power mode is switched to a pure engine output mode, the upper limit value of the fourth power range is lower than the lower limit value of the first power range, and the upper limit value of the third power range is lower than the lower limit value of the fourth power range.

2. The vehicle power mode switching method according to claim 1, characterized in that: The vehicle power mode switching method further includes: When the vehicle's power mode is switched from pure motor output mode to pure engine output mode, the motor stops outputting power when the motor lifts the engine to the optimal power output range.

3. The vehicle power mode switching method according to claim 1, characterized in that: The vehicle power mode switching method further includes: In the process of switching the power mode of the vehicle from the pure engine output mode to the motor and engine simultaneous output mode, obtaining an increase value of the vehicle demand power; The increase in the vehicle's required power is met by increasing the motor's output power; When the absolute value of the difference between the target output power and the actual output power of the engine is smaller than the preset fluctuation value, the output power ratio of the motor and the engine is restored to a normal ratio.

4. The vehicle power mode switching method according to claim 1, characterized in that: The vehicle power mode switching method further includes: In the process of the vehicle's power mode switching from pure motor output mode to simultaneous motor and engine output mode, or from pure engine output mode to simultaneous motor and engine output mode, or from pure motor output mode to pure engine output mode, or from pure engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure motor output mode, or from simultaneous motor and engine output mode to pure engine output mode, the difference between the vehicle's required power and the actual output power of the engine is met by adjusting the motor output power.

5. A vehicle power mode switching device, characterized in that: The vehicle power mode switching device comprises: An acquisition module is used to acquire the battery power of the vehicle and determine the power range of the battery power; A first switching module is used for, when the battery power is in the first power range, if the vehicle demand power is less than the optimal power output range of the engine, switching the vehicle's power mode to a pure motor output mode; if the vehicle demand power is in the optimal power output range of the engine, switching the vehicle's power mode to a pure engine output mode; if the vehicle demand power is greater than the optimal power output range of the engine, switching the vehicle's power mode to a simultaneous motor and engine output mode; A second switching module is used for, when the battery power is in the second power range, if the vehicle demand power is less than or equal to the maximum output power of the motor, switching the vehicle power mode to a pure motor output mode; if the vehicle demand power is greater than the maximum output power of the motor, switching the vehicle power mode to a simultaneous output mode of the motor and the engine; Wherein, when the power mode of the vehicle is the motor and engine simultaneous output mode and the battery power is in the first power range, the engine is made to output at the maximum power within the optimal power output range; when the power mode of the vehicle is the motor and engine simultaneous output mode and the battery power is in the second power range, the motor is made to output at the maximum output power, and the lower limit value of the second power range is higher than the upper limit value of the first power range; Also included is a third switching module, configured to: When the power mode of the vehicle is switched from a pure motor output mode to a pure engine output mode, or from a pure motor output mode to a motor and engine simultaneous output mode, a preset speed difference is determined according to the slope of the road on which the vehicle is traveling; If the vehicle is traveling uphill, the clutch is controlled to engage when the engine speed is greater than the motor speed, the difference between the engine speed and the motor speed is less than the preset speed difference, and the motor speed is greater than the engine idle speed; If the vehicle is traveling downhill, the clutch is controlled to engage when the engine speed is less than the motor speed, the difference between the motor speed and the engine speed is less than the preset speed difference, and the engine speed is greater than the engine idle speed; Also included is a seventh switching mode for: When the battery power level is in the third power range, the vehicle power mode is switched to a mode of pure engine output while charging the battery, and the output power of the air-conditioning compressor is reduced to a preset power; When the battery power is in a fourth power range, the vehicle's power mode is switched to a pure engine output mode, the upper limit value of the fourth power range is lower than the lower limit value of the first power range, and the upper limit value of the third power range is lower than the lower limit value of the fourth power range.

6. A vehicle power mode switching device, characterized in that: The vehicle power mode switching device includes a processor, a memory, and a vehicle power mode switching program stored in the memory and executable by the processor, wherein when the vehicle power mode switching program is executed by the processor, the steps of the vehicle power mode switching method as described in any one of claims 1 to 4 are implemented.

7. A readable storage medium, characterized in that: The readable storage medium stores a vehicle power mode switching program, wherein when the vehicle power mode switching program is executed by a processor, the steps of the vehicle power mode switching method according to any one of claims 1 to 4 are implemented.

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