Hybrid power mode control method, power controller, control system, and vehicle

Abstract

A hybrid power mode control method. When it is detected that an environment condition satisfies a critical condition of series-parallel mode switching during vehicle traveling, whether a gradient parameter is greater than a preset gradient is determined; if yes, whether an acceleration parameter is greater than a first threshold, or whether a pedal opening degree change parameter is greater than a second threshold is continued to be detected; and if the determination result of any one of the two determinations is YES, a vehicle is controlled to continue traveling in a parallel mode within a set duration instead of immediately switching the vehicle to a series mode, so that the problem of increase of a rotating speed when switching from the parallel mode to the series mode is avoided, thereby avoiding noise generated during engine operation. The present method improves user experience. Also provided are a power controller, a control system, and a vehicle.

Description

Hybrid power mode control method, power controller, control system and vehicle Technical Field

[0001] The present application relates to the field of hybrid electric vehicles, and in particular to a control method, a power controller, a control system and a vehicle in a hybrid electric mode. Background Art

[0002] The hybrid power system of a hybrid vehicle includes pure electric mode, series mode and parallel mode. Among them, the pure electric mode means that the power battery provides electrical energy to the motor, and then the motor drives the vehicle; the series mode means that the engine drives the generator to generate electricity, the generator provides electricity to the motor, and then the motor drives the vehicle; the parallel mode means that the engine and the motor drive the vehicle together.

[0003] To fully leverage the advantages of the engine and motor in both series and parallel modes, existing hybrid systems can adaptively switch between hybrid modes when vehicle speed and accelerator pedal conditions are met. However, when switching from parallel to series mode, the engine speed in series mode is higher than in parallel mode because it is not constrained by the wheel mechanical structure, generating noticeable noise. In this case, the background noise of the vehicle cannot cover the sound of the operating engine, significantly affecting the user's driving mood and experience.

[0004] Summary of the Invention

[0005] In view of this, the present application provides a hybrid power mode control method, power controller, control system and vehicle to solve the problem that traditional control methods easily generate obvious noise when switching the vehicle from parallel mode to series mode, resulting in a decrease in user experience.

[0006] In a first aspect, the present application provides a control method for a hybrid power mode, the method comprising:

[0007] When it is detected that the environmental conditions reach the critical conditions for switching between the series and parallel modes during vehicle driving, the slope parameter of the road condition and the acceleration parameter of the vehicle or the pedal opening change parameter are obtained, and the driving mode of the vehicle is in the parallel mode during driving;

[0008] Determine whether the slope parameter is greater than the preset slope;

[0009] If yes, then detecting whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold;

[0010] If the result of either of the two judgments is yes, the vehicle is controlled to maintain driving in parallel mode for a set period of time.

[0011] When the vehicle detects that environmental conditions have reached the critical condition for switching between series and parallel modes during driving, it determines whether the slope parameter is greater than a preset slope. If so, it then checks whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold. If either judgment is positive, the vehicle is not immediately switched to series mode. Instead, it is controlled to maintain parallel mode for a set duration, avoiding the speed increase when switching from parallel to series mode, thereby preventing engine noise and preventing a negative user experience.

[0012] In an optional embodiment, the method further includes:

[0013] When the slope parameter is less than the preset slope, detecting whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold;

[0014] If the result of either of the two judgments is yes, the vehicle is controlled to maintain driving in parallel mode for a set period of time.

[0015] This system determines whether the vehicle triggers a series-parallel switchover by detecting whether the acceleration parameter is greater than a first threshold or whether the pedal opening change parameter is greater than a second threshold when the slope parameter is less than a preset slope. If either determination is positive, the vehicle is first controlled to maintain parallel mode for a set duration before switching to series mode. This avoids the speed increase associated with the parallel-to-series switchover, thus preventing engine noise and potentially negative user experience.

[0016] In an optional embodiment, the environmental conditions include the altitude of the environment in which the vehicle is located;

[0017] It is detected that the environmental conditions have reached the critical conditions for series-parallel mode switching, including:

[0018] The vehicle's altitude is detected to have exceeded the altitude threshold.

[0019] Therefore, by judging whether the altitude of the vehicle exceeds the altitude threshold, it is detected whether the environmental conditions have reached the critical conditions for switching between series and parallel modes.

[0020] In an optional embodiment, the environmental condition includes a first temperature of an environment in which the vehicle is located;

[0021] It is detected that the environmental conditions have reached the critical conditions for series-parallel mode switching, including:

[0022] It is detected that a first temperature of an environment in which the vehicle is located exceeds a first preset temperature range.

[0023] Therefore, by judging whether the first temperature of the environment in which the vehicle is located exceeds the first preset temperature range, it is detected whether the environmental conditions have reached the critical conditions for switching between the series-parallel modes.

[0024] In an optional embodiment, the environmental conditions include a battery charge parameter SOC on the vehicle;

[0025] It is detected that the environmental conditions have reached the critical conditions for series-parallel mode switching, including:

[0026] It is detected that the battery SOC percentage is lower than the charge threshold.

[0027] Therefore, by judging whether the battery SOC percentage is lower than the power threshold, it is detected whether the environmental conditions have reached the critical conditions for series-parallel mode switching.

[0028] In an alternative embodiment, the environmental condition includes a second temperature of a battery on the vehicle;

[0029] It is detected that the environmental conditions have reached the critical conditions for series-parallel mode switching, including:

[0030] It is detected that the second temperature of the battery exceeds a second preset temperature range.

[0031] Therefore, by judging whether the second temperature of the battery exceeds the second preset temperature range, it is detected whether the environmental condition reaches the critical condition for switching between the series-parallel mode.

[0032] In an optional embodiment, after controlling the vehicle to maintain the parallel mode for a set period of time, the method further includes:

[0033] Switch the vehicle's driving mode from parallel mode to series mode.

[0034] Therefore, after the series-parallel switching is triggered, the vehicle is first controlled to maintain parallel mode and continue driving within the set time, and then switches to series mode, so as to avoid noise when the engine is running.

[0035] In an optional embodiment, during the vehicle driving process, when the preset conditions are met, the driving mode of the vehicle is controlled to be the parallel mode.

[0036] The preconditions include one or more of the following:

[0037] The vehicle speed is greater than the speed threshold;

[0038] The vehicle is in forward gear;

[0039] The battery SOC percentage on the vehicle is higher than the power threshold;

[0040] The vehicle's driving mode is in pure electric driving mode;

[0041] There was no clutch failure on the vehicle;

[0042] The engine on the vehicle is in a fired state and the vehicle's fuel level is above a fuel level threshold.

[0043] Therefore, when the preset conditions are met, the vehicle's driving mode is controlled to be parallel mode to improve economy.

[0044] In a second aspect, the present application provides a control device for a hybrid power mode, the device comprising:

[0045] an acquisition module, configured to acquire a road slope parameter and a vehicle acceleration parameter or a pedal opening change parameter when detecting that environmental conditions reach a critical condition for switching between series and parallel modes during vehicle driving, wherein the vehicle driving mode is in parallel mode during driving;

[0046] A judgment module, used to judge whether the slope parameter is greater than a preset slope;

[0047] a detection module, configured to detect whether the acceleration parameter is greater than a first threshold value, or whether the pedal opening change parameter is greater than a second threshold value, when the second processing module determines that the acceleration parameter is greater than a first threshold value;

[0048] The control module is configured to control the vehicle to maintain the parallel mode for a set period of time if any one of the two judgments in the third processing module is yes.

[0049] In an optional embodiment, the judging module is further configured to judge whether the slope parameter is less than a preset slope;

[0050] The detection module is further configured to detect whether the acceleration parameter is greater than a first threshold value, or whether the pedal opening change parameter is greater than a second threshold value when the judgment module determines that the acceleration parameter is greater than a first threshold value;

[0051] The control module is further configured to control the vehicle to maintain driving in the parallel mode for a set period of time when the detection module detects that any one of the two judgments is yes.

[0052] In an optional embodiment, the environmental condition includes the altitude of the environment in which the vehicle is located; detecting that the environmental condition reaches a critical condition for switching between series and parallel modes includes: detecting that the altitude of the vehicle exceeds an altitude threshold.

[0053] In an optional embodiment, the environmental condition includes a first temperature of the vehicle's environment; detecting that the environmental condition reaches a critical condition for switching between series and parallel modes includes: detecting that the first temperature of the vehicle's environment exceeds a first preset temperature range.

[0054] In an optional embodiment, the environmental conditions include a battery charging parameter SOC on the vehicle; detecting that the environmental conditions reach a critical condition for series-parallel mode switching includes: detecting that the battery SOC percentage is lower than a power threshold.

[0055] In an optional embodiment, the environmental condition includes a second temperature of a battery on the vehicle; detecting that the environmental condition reaches a critical condition for switching between series and parallel modes includes: detecting that the second temperature of the battery exceeds a second preset temperature range.

[0056] In an optional embodiment, the control module is further configured to switch the vehicle's driving mode from the parallel mode to the series mode after controlling the vehicle to maintain driving in the parallel mode for a set period of time.

[0057] In an optional embodiment, the control module is further configured to control the vehicle's driving mode to be a parallel mode when a preset condition is met during the vehicle's driving process.

[0058] The preconditions include one or more of the following:

[0059] The vehicle speed is greater than the speed threshold;

[0060] The vehicle is in forward gear;

[0061] The battery SOC percentage on the vehicle is higher than the power threshold;

[0062] The vehicle's driving mode is in pure electric driving mode;

[0063] There was no clutch failure on the vehicle;

[0064] The engine on the vehicle is in a fired state and the vehicle's fuel level is above a fuel level threshold.

[0065] In a third aspect, the present application provides a power controller comprising a memory and a processor, the memory and the processor being connected; computer instructions are stored in the memory; the processor executes the control method of the hybrid power mode of the above-mentioned first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0066] In a fourth aspect, the present application provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the control method for the hybrid power mode of the first aspect or any corresponding embodiment thereof.

[0067] In a fifth aspect, the present application provides a control system for a hybrid mode, including a power controller, a transmission controller, a clutch, a battery, a power distribution unit, a motor, a generator, and an engine;

[0068] The power controller is connected to the transmission controller, the transmission controller is connected to the clutch, the clutch is connected to the engine and the generator respectively, the generator is connected to the battery via the power distribution unit, and the battery is connected to the electric motor;

[0069] The power controller is used to execute the control method of the hybrid power mode of the first aspect or any corresponding embodiment thereof.

[0070] In a sixth aspect, the present application provides a vehicle comprising the hybrid power mode control system of the fifth aspect described above.

[0071] The beneficial effects of this application are:

[0072] When the vehicle detects that environmental conditions have reached the critical condition for switching between series and parallel modes during driving, it determines whether the slope parameter is greater than a preset slope. If so, it then checks whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold. If either judgment is positive, the vehicle is not immediately switched to series mode. Instead, it is controlled to maintain parallel mode for a set duration, avoiding the problem of increased speed when switching from parallel to series mode, thereby preventing engine noise and preventing a negative user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0074] FIG1 is a schematic structural diagram of a control system of a hybrid power mode provided by an embodiment of the present application;

[0075] FIG2A is a schematic diagram of the structure of the series mode provided in an embodiment of the present application;

[0076] FIG2B is a data flow diagram of a request to switch to a serial mode according to an embodiment of the present application;

[0077] FIG3A is a schematic structural diagram of a parallel mode provided in an embodiment of the present application;

[0078] FIG3B is a data flow diagram of a request to switch to a parallel mode according to an embodiment of the present application;

[0079] FIG4 is a flow chart of a control method for a hybrid power mode according to an embodiment of the present application;

[0080] FIG5 is a schematic diagram of a flow chart for determining whether there is an economical parallel connection request according to an embodiment of the present application;

[0081] FIG6 is a flow chart of another hybrid power mode control method provided by an embodiment of the present application;

[0082] FIG7 is a flow chart of another hybrid power mode control method provided by an embodiment of the present application;

[0083] FIG8 is a structural block diagram of a control device for a hybrid power mode provided by an embodiment of the present application;

[0084] FIG9 is a schematic diagram of the hardware structure of a power controller according to an embodiment of the present application;

[0085] FIG10 is a schematic structural diagram of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0086] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions 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 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 those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0087] Plug-in Hybrid Electric Vehicle (PHEV) configurations are mostly in the form of a series connection, which includes two operating states: series and parallel. When in parallel, the engine and wheel ends are coupled, the engine and wheels are mechanically connected, and the speed is limited by the vehicle speed; when in series, the engine and wheel ends are decoupled, and the engine can independently select the speed operating point.

[0088] The pure electric drive mode of PHEV vehicles is a major concern for many users today, especially for some PHEV vehicles with low mileage, which have weak pure inductance in low-battery state. The problem mainly comes from the fact that in order to ensure that the battery does not continue to decrease in the balanced battery state, the power structure is switched from parallel direct drive to series state. The engine (i.e., engine) speed in the series state is not constrained by the mechanical structure of the wheels, and the speed is generally higher than that of the parallel state, which will cause noise and reduce the user experience.

[0089] According to an embodiment of the present application, a control system for a hybrid mode is provided, as shown in Figure 1, the control system includes a power controller (Power Control Unit, PTU) 101, a transmission controller (Power Transmission Control Unit, PTCU) 102, a clutch (OD Clucth, ODC) 103, a battery (Battery, BATT) 104, a power distribution unit (Power Distribution Unit, PDU) 105, a motor (Motor, MOT) 106, a generator (Generator, GEN) 107 and an engine (Engine, ENG) 108.

[0090] Among them, the power controller 101 is connected to the transmission controller 102, the transmission controller 102 is connected to the clutch 103, the clutch 103 is connected to the engine 108 and the generator 107 respectively, the generator 107 is connected to the battery 104 via the power distribution unit 105, and the battery 104 is connected to the motor 106.

[0091] When the hybrid vehicle is running in pure electric mode, the clutch 103 is disconnected. This pure electric mode is suitable for scenarios with sufficient battery power and open areas, such as vehicle starting and urban road conditions.

[0092] Figure 2A is a schematic diagram of the hybrid vehicle operating in series mode. As shown in Figure 2A , when the hybrid vehicle is operating in series mode, clutch 103 is disengaged, engine 108 drives generator 107 to generate electricity, and generator 107, after conversion through power distribution unit 105 and battery 104, supplies electricity to motor 106, which then drives the vehicle. This series mode is suitable for situations where the battery is low or the vehicle load varies significantly.

[0093] It should be noted that engine 108 supplies power to motor 106 via generator 107, converting electrical energy into mechanical energy. When driving demand decreases, engine 108 uses excess energy to charge battery 104. When driving demand increases, battery 104 discharges energy and, together with generator 107, provides electrical energy to motor 106.

[0094] As shown in Figure 2B, the power controller 101 sends a clutch disconnect request to the transmission controller 102. After receiving the clutch disconnect request, the transmission controller 102 sends a main pressure solenoid valve closing request and a clutch solenoid valve closing request to the clutch 103 to control the clutch 103 to disconnect, thereby achieving the effect of switching to the series mode.

[0095] FIG3A is a schematic diagram of the structure of a hybrid vehicle in parallel mode. As shown in FIG3A , when the hybrid vehicle is operating in parallel mode, clutch 103 is closed and engine 108 directly drives the vehicle. When the driving demand decreases, engine 108 charges battery 104 with excess energy. When the driving demand increases, battery 104 discharges energy to motor 106, and motor 106 and engine 108 jointly drive the vehicle. This parallel mode is suitable for situations where the battery is low or the vehicle load changes little at high speeds.

[0096] As shown in Figure 3B , the power controller 101 first sends a series-parallel switching request to the transmission controller 102. After receiving the series-parallel switching request, the transmission controller 102 sends a line pressure solenoid valve opening request to the clutch 103. Next, the power controller 101 sends a clutch closing request to the transmission controller 102. After receiving the clutch closing request, the transmission controller 102 sends a clutch solenoid valve opening request to the clutch 103, controlling the clutch 103 to close and achieve the effect of switching to parallel mode.

[0097] The specific working principle and working process of the power controller 101 can be found in the relevant description of the method embodiment below, which will not be repeated here.

[0098] According to an embodiment of the present application, an embodiment of a control method for a hybrid mode is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0099] In this embodiment, a hybrid power mode control method is provided, which can be used in a power controller, such as an MCU or a single-chip microcomputer, in a hybrid power mode control system as shown in FIG1 . FIG4 is a flow chart of the hybrid power mode control method according to an embodiment of the present application. As shown in FIG4 , the flow chart includes the following steps:

[0100] Step S101, when it is detected that the environmental conditions reach the critical conditions for switching between series and parallel modes during vehicle driving, the slope parameter of the road condition and the acceleration parameter or pedal opening change parameter of the vehicle are obtained, and the driving mode of the vehicle is in parallel mode during driving.

[0101] Specifically, before the vehicle travels in parallel mode, it must go through two steps of judgment: first, it is determined whether the vehicle has an economical parallel request, and then it is determined whether the preset conditions for switching to parallel mode are met.

[0102] In some optional embodiments, when determining whether the vehicle has an economical parallel request, the transient equivalent fuel consumption minimization algorithm (Equivalent Consumption Minimization Strategy, ECMS) based on the current torque distribution strategy is used to ensure that the vehicle's engine (i.e., the engine) is always in the most energy-efficient target state. As shown in Figure 5, the ECMS algorithm will establish an equivalent relationship between the electric energy consumed by the vehicle and the fuel required to compensate for the electric energy, and reduce the engine fuel consumption and electric consumption at a certain moment to a unified energy consumption index. With the minimum instantaneous equivalent energy consumption as the control target, the instantaneous equivalent energy consumption in the series mode and the parallel mode is calculated respectively, and the two are compared. The smaller one is the economical target driving mode. When the equivalent minimum energy consumption of the parallel mode is less than the equivalent minimum energy consumption of the series mode, the economical parallel target mode is output and an economical parallel request is generated; when the equivalent minimum energy consumption of the series mode is less than the equivalent minimum energy consumption of the parallel mode, the economical series target mode is output and an economical series request is generated. It should be noted that the calculation method of the equivalent minimum energy consumption of the parallel mode is as follows:

[0103] Parallel mode equivalent minimum energy consumption = (parallel engine power + parallel engine loss) + (parallel drive motor power + parallel drive motor loss) * equivalent factor;

[0104] Among them, in parallel mode, generator power and generator loss = 0.

[0105] In addition, the equivalent minimum energy consumption of the series mode is calculated as follows:

[0106] Equivalent minimum energy consumption in series mode = (series engine power + series engine loss) + (series generator power + series generator loss + series drive motor power + series drive motor loss) * equivalent factor.

[0107] Therefore, by calculating the equivalent minimum energy consumption of the parallel mode and the equivalent minimum energy consumption of the series mode and comparing the two, it is determined whether there is an economical parallel request.

[0108] In some optional embodiments, during vehicle travel, if preset conditions are met, the vehicle's drive mode is controlled to be a parallel mode. When determining whether the preset conditions for switching to the parallel mode are met, the preset conditions include one or more of the following: the vehicle speed is greater than a speed threshold, the vehicle is in a forward gear, the vehicle's battery SOC percentage is greater than a charge threshold, the vehicle's drive mode is in a pure electric drive mode, the vehicle's clutch is not faulty, the vehicle's engine is in an ignition state, and the vehicle's fuel level is greater than a fuel level threshold.

[0109] It's important to note that SOC (State of Charge) refers to a battery's state of charge, or the ratio of its current stored charge to its maximum capacity. SOC is expressed as a percentage, ranging from 0% (completely discharged) to 100% (fully charged). SOC is a common concept in electric and hybrid vehicles to indicate the battery's charge level. The current SOC value is determined by monitoring and calculating the current and voltage in the battery.

[0110] Therefore, when the preset conditions are met, the vehicle's driving mode is controlled to be parallel mode, achieving an economical parallel effect.

[0111] Specifically, environmental conditions include the vehicle's altitude. When the vehicle's altitude exceeds a threshold altitude, it is determined that the environmental conditions have reached the critical condition for series-parallel mode switching. For example, at high altitudes, the vehicle's torque retention is particularly difficult, as high altitude affects the engine's external characteristic torque. Therefore, when the altitude exceeds the threshold altitude, the series-parallel mode switch is triggered, disabling the parallel mode retention function and operating in series mode. At low altitudes, i.e., below the threshold altitude, the vehicle maintains parallel mode.

[0112] Therefore, by judging whether the altitude of the vehicle exceeds the altitude threshold, it is detected whether the environmental conditions have reached the critical conditions for switching between series and parallel modes.

[0113] Specifically, the environmental conditions include a first temperature of the vehicle's environment. When it is detected that the first temperature of the vehicle's environment exceeds a first preset temperature range, it is detected that the environmental conditions have reached a critical condition for series-parallel mode switching. For example, when the first temperature of the vehicle's environment is room temperature, that is, the ambient temperature is within the first preset temperature range, the parallel mode is maintained; when the first temperature of the vehicle's environment is extremely high or extremely low, that is, the ambient temperature exceeds the first preset temperature range, due to the characteristics of the battery, the discharge power is significantly attenuated compared to room temperature, and at this time, the series-parallel mode switch is triggered, and the vehicle will turn off the parallel mode retention function and operate in the series mode.

[0114] Therefore, by judging whether the first temperature of the environment in which the vehicle is located exceeds the first preset temperature range, it is detected whether the environmental conditions have reached the critical conditions for switching between the series-parallel modes.

[0115] Specifically, environmental conditions include the battery charging parameter SOC on the vehicle. When the battery SOC percentage is detected to be lower than the power threshold, it is detected that the environmental conditions have reached the critical condition for series-parallel mode switching. For example, when the battery SOC percentage is extremely low, power conservation is the primary requirement of the entire vehicle. Therefore, when the SOC percentage is lower than the power threshold, the series-parallel mode switch will be triggered, and the vehicle will turn off the parallel mode hold function and operate in the series mode; when the battery SOC percentage increases, that is, when the battery SOC percentage is higher than the power threshold, the parallel mode is maintained.

[0116] Therefore, by judging whether the battery SOC percentage is lower than the power threshold, it is detected whether the environmental conditions have reached the critical conditions for series-parallel mode switching.

[0117] Specifically, the environmental condition includes a second temperature of the vehicle's battery. When the second battery temperature is detected to exceed a second preset temperature range, it is determined that the environmental condition has reached a critical condition for series-parallel mode switching. For example, when the battery temperature is extremely low or high, i.e., due to the characteristics of the battery, the discharge power is significantly attenuated compared to room temperature. Therefore, when the second battery temperature exceeds the second preset temperature range, the series-parallel mode switch is triggered, and the vehicle will immediately disable the parallel mode retention function and operate in series mode.

[0118] Therefore, by judging whether the second temperature of the battery exceeds the second preset temperature range, it is detected whether the environmental condition reaches the critical condition for switching between the series-parallel mode.

[0119] It should be noted that when the vehicle is traveling in parallel mode and the environmental conditions of the vehicle are detected, if it is detected that the vehicle's altitude does not exceed the altitude threshold, and the first temperature of the vehicle's environment does not exceed the first preset temperature range, and the battery SOC percentage is not lower than the power threshold and the second temperature of the battery does not exceed the second preset temperature range, it means that the environmental conditions have not reached the critical conditions for switching between series and parallel modes, and the vehicle is controlled to continue traveling in parallel mode.

[0120] Step S102: determine whether the slope parameter is greater than a preset slope.

[0121] Specifically, if the judgment result of step S102 is yes, step S103 is executed.

[0122] For example, the preset slope may be 5°, or a set slope range such as 5-10°, but the present application is not limited thereto.

[0123] Step S103 , detecting whether the acceleration parameter is greater than a first threshold, or whether the pedal opening variation parameter is greater than a second threshold.

[0124] In some optional embodiments, the acceleration parameter a is calculated based on vehicle speed, time and the following formula: v : a v =(v2-v1) / (t2-t1)

[0125] Among them, v2 represents the speed at time t2, and v1 represents the speed at time t1.

[0126] In some optional embodiments, the pedal opening change parameter a is calculated based on the pedal opening, time and the following formula: p : a p =(p2-p1) / (t2-t1)

[0127] Here, p2 represents the pedal opening at time t2, and p1 represents the pedal opening at time t1.

[0128] Specifically, the system determines whether the vehicle has triggered a transient operating condition by detecting whether the acceleration parameter is greater than a first threshold, or whether the pedal opening variation parameter is greater than a second threshold. If the slope parameter is greater than a preset slope and the acceleration parameter is greater than the first threshold, the transient operating condition is determined to have been triggered. Alternatively, if the slope parameter is greater than a preset slope and the pedal opening variation parameter is greater than the second threshold, the transient operating condition is also determined to have been triggered.

[0129] Specifically, if the results of both judgments in step S103 are negative, the series mode or the parallel mode is freely switched according to the economy or power requirement.

[0130] Specifically, if the result of any one of the two judgments in step S103 is yes, step S104 is executed.

[0131] Step S104: Control the vehicle to maintain the parallel mode for a set time period.

[0132] Specifically, after determining that the vehicle has triggered a transient operating condition, the vehicle is not immediately switched to series mode. Instead, it is controlled to maintain parallel mode for a set duration. This avoids the problem of increased speed when switching from parallel to series mode, thereby preventing engine noise during operation and preventing a negative user experience. It should be noted that the set duration can be set according to the specific vehicle model and actual scenario.

[0133] The control method of the hybrid mode provided in the embodiment of the present application obtains the slope parameter of the road condition and the acceleration parameter or pedal opening change parameter of the vehicle when it is detected that the environmental conditions have reached the critical conditions for switching between series and parallel modes during the driving process of the vehicle. Then, it is judged whether the slope parameter is greater than the preset slope. If so, it is detected whether the acceleration parameter is greater than the first threshold value, or whether the pedal opening change parameter is greater than the second threshold value, and it is judged from multiple dimensions whether the vehicle triggers a transient working condition. If the result of any of the two judgments is yes, the vehicle is controlled to maintain driving in parallel mode and continue for a set time. In this way, the vehicle is not immediately switched to series mode, but is controlled to maintain parallel mode for a set time to continue driving, which can avoid the problem of increased speed when switching from parallel to series, thereby avoiding noise generated when the engine is running. This method improves the user experience.

[0134] In this embodiment, a hybrid power mode control method is provided, which can be used in a power controller, such as a microcontroller unit (MCU), a single-chip microcomputer, etc., in a hybrid power mode control system as shown in FIG1 . FIG6 is a flow chart of the hybrid power mode control method according to an embodiment of the present application. As shown in FIG6 , the flow chart includes the following steps:

[0135] In step S201, when it is detected that environmental conditions have reached a critical condition for switching between series and parallel modes during vehicle driving, a road slope parameter and a vehicle acceleration parameter or a pedal opening change parameter are obtained. The vehicle driving mode is switched to parallel mode during driving. For details, see the description of step S101 in FIG. 4 and will not be repeated here.

[0136] Step S202 : When the slope parameter is less than the preset slope, it is detected whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold.

[0137] Specifically, the system determines whether the vehicle has triggered a transient operating condition by detecting whether the acceleration parameter is greater than a first threshold, or whether the pedal opening variation parameter is greater than a second threshold. If the slope parameter is less than a preset slope and the acceleration parameter is greater than the first threshold, the transient operating condition is determined to have been triggered. Alternatively, if the slope parameter is less than a preset slope and the pedal opening variation parameter is greater than the second threshold, the transient operating condition is also determined to have been triggered.

[0138] Specifically, the calculation process of the acceleration parameter and the pedal opening variation parameter can refer to the relevant description of step S103 shown in FIG4 , which will not be described in detail here.

[0139] Specifically, if the result of any one of the two judgments in step S202 is yes, step S203 is executed.

[0140] Step S203: Control the vehicle to maintain the parallel mode for a set period of time. For details, refer to the description of step S104 shown in FIG4 , which will not be repeated here.

[0141] Specifically, after executing step S203 , that is, after the set time period ends, step S204 is executed.

[0142] Step S204 , switching the driving mode of the vehicle from the parallel mode to the series mode.

[0143] Specifically, after the set time has elapsed, the vehicle's driving mode is switched from parallel to series. This way, after the series-parallel switch is triggered, the vehicle is first controlled to continue driving in parallel mode for the set time, and then switches to series mode. This avoids the problem of increased speed when switching from parallel to series, avoids engine noise during operation, and prevents a negative user experience.

[0144] The control method of the hybrid power mode provided in the embodiment of the present application obtains the slope parameter of the road condition and the acceleration parameter or pedal opening change parameter of the vehicle when it is detected that the environmental conditions have reached the critical conditions for switching between series and parallel modes during the driving process of the vehicle. When the slope parameter is less than the preset slope, it is detected whether the acceleration parameter is greater than the first threshold value, or whether the pedal opening change parameter is greater than the second threshold value, and it is judged from multiple dimensions whether the vehicle triggers the series-parallel switching. If the result of any of the two judgments is yes, the vehicle is controlled to maintain driving in parallel mode and continue for a set time. In this way, the vehicle is first controlled to maintain driving in parallel mode for a set time, and then switched to series mode. This can avoid the problem of increased speed when switching from parallel to series, thereby avoiding noise generated when the engine is running and preventing a bad experience for the user.

[0145] The control method of the hybrid power mode of the embodiment of the present application is described in detail below with reference to a specific application example. As shown in FIG7 , the specific application example includes the following steps:

[0146] Step 1: Determine whether the vehicle's current mode is parallel mode. First, determine whether the vehicle has an economical parallel request. Then determine whether the preset conditions for switching to parallel mode are met. The preset conditions include one or more of the following: the vehicle speed is greater than a speed threshold, the vehicle is in a forward gear, the vehicle's battery SOC percentage is greater than a charge threshold, the vehicle's drive mode is in pure electric drive mode, the vehicle's clutch is not faulty, the vehicle's engine is in the ignition state, and the vehicle's fuel level is greater than a fuel level threshold.

[0147] Step 2: Determine whether there is a request to switch from parallel to series: first determine whether the basic conditions for parallel maintenance are met, then determine whether the critical conditions for series-parallel mode switching are met, and finally determine whether the transient operating conditions are met.

[0148] When determining whether the basic conditions for parallel maintenance are met, first determine whether the vehicle has an economical parallel request, and then determine whether the preset conditions for switching to the parallel mode are met, where the preset conditions include one or more of the following: the vehicle speed is greater than the speed threshold, the vehicle gear is in the forward gear, the battery SOC percentage on the vehicle is higher than the power threshold, the vehicle's driving mode is in pure electric driving mode, the vehicle's clutch is not faulty, the vehicle's engine is in the ignition state, and the vehicle's fuel level is higher than the fuel level threshold.

[0149] When determining whether the critical conditions for switching between series and parallel modes are met, if it is detected that the vehicle's altitude exceeds the altitude threshold, or the first temperature of the vehicle's environment exceeds the first preset temperature range, or the battery SOC percentage is lower than the power threshold, or the second temperature of the battery exceeds the second preset temperature range, it is detected that the environmental conditions have met the critical conditions for switching between series and parallel modes.

[0150] When determining whether a transient operating condition is met, the system first determines whether the slope parameter is greater than (less than) a preset slope. If so, the system then checks whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold. If either of these two determinations is positive, the transient operating condition is determined to be met.

[0151] This embodiment also provides a hybrid mode control device for implementing the aforementioned embodiments and preferred implementations. Details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. While the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

[0152] This embodiment provides a control device for a hybrid power mode, as shown in FIG8 , including:

[0153] an acquisition module, configured to acquire a road slope parameter and a vehicle acceleration parameter or a pedal opening change parameter when detecting that environmental conditions reach a critical condition for switching between series and parallel modes during vehicle driving, wherein the vehicle driving mode is in parallel mode during driving;

[0154] A judgment module, used to judge whether the slope parameter is greater than a preset slope;

[0155] a detection module, configured to detect whether the acceleration parameter is greater than a first threshold value, or whether the pedal opening change parameter is greater than a second threshold value, when the second processing module determines that the acceleration parameter is greater than a first threshold value;

[0156] The control module is configured to control the vehicle to maintain the parallel mode for a set period of time if any one of the two judgments in the third processing module is yes.

[0157] In an optional embodiment, the judging module is further configured to judge whether the slope parameter is less than a preset slope;

[0158] The detection module is further configured to detect whether the acceleration parameter is greater than a first threshold value, or whether the pedal opening change parameter is greater than a second threshold value when the judgment module determines that the acceleration parameter is greater than a first threshold value;

[0159] The control module is further configured to control the vehicle to maintain driving in the parallel mode for a set period of time when the detection module detects that any one of the two judgments is yes.

[0160] In an optional embodiment, the environmental condition includes the altitude of the environment in which the vehicle is located; detecting that the environmental condition reaches a critical condition for switching between series and parallel modes includes: detecting that the altitude of the vehicle exceeds an altitude threshold.

[0161] In an optional embodiment, the environmental condition includes a first temperature of the vehicle's environment; detecting that the environmental condition reaches a critical condition for switching between series and parallel modes includes: detecting that the first temperature of the vehicle's environment exceeds a first preset temperature range.

[0162] In an optional embodiment, the environmental conditions include a battery charging parameter SOC on the vehicle; detecting that the environmental conditions reach a critical condition for series-parallel mode switching includes: detecting that the battery SOC percentage is lower than a power threshold.

[0163] In an optional embodiment, the environmental condition includes a second temperature of a battery on the vehicle; detecting that the environmental condition reaches a critical condition for switching between series and parallel modes includes: detecting that the second temperature of the battery exceeds a second preset temperature range.

[0164] In an optional embodiment, the control module is further configured to switch the vehicle's driving mode from the parallel mode to the series mode after controlling the vehicle to maintain driving in the parallel mode for a set period of time.

[0165] In an optional embodiment, the control module is further configured to control the vehicle's driving mode to be a parallel mode when a preset condition is met during the vehicle's driving process.

[0166] The preconditions include one or more of the following:

[0167] The vehicle speed is greater than the speed threshold;

[0168] The vehicle is in forward gear;

[0169] The battery SOC percentage on the vehicle is higher than the power threshold;

[0170] The vehicle's driving mode is in pure electric driving mode;

[0171] There was no clutch failure on the vehicle;

[0172] The engine on the vehicle is in a fired state and the vehicle's fuel level is above a fuel level threshold.

[0173] The control device of the hybrid mode in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0174] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0175] An embodiment of the present application further provides a power controller having the control device of the hybrid power mode shown in FIG8 above.

[0176] Please refer to Figure 9, which is a structural diagram of a power controller provided by an optional embodiment of the present application. As shown in Figure 9, the power controller includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the power controller, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface).

[0177] In some alternative embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple storages if desired. Similarly, multiple devices can be connected, each providing a portion of the necessary operations (e.g., as a server array, a group of blade servers, or a multi-processor system). FIG9 shows a single processor 10 as an example.

[0178] The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0179] The memory 20 stores instructions that can be executed by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0180] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created based on the use of the power controller, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely located relative to the processor 10, and these remote memories may be connected to the power controller via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0181] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0182] The power controller further includes a communication interface 30 for the power controller to communicate with other devices or a communication network.

[0183] The embodiments of the present application also provide a computer-readable storage medium. The above-mentioned method according to the embodiments of the present application can be implemented in hardware, firmware, or implemented as a computer code that can be recorded on a storage medium, or downloaded via a network and originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware.

[0184] The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid-state drive, etc.; optionally, the storage medium may also include a combination of the aforementioned types of memory. It is understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the methods shown in the above embodiments are implemented.

[0185] In addition, this embodiment also provides a vehicle, as shown in FIG10 , which includes the hybrid power mode control system shown in FIG1 .

[0186] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A control method for a hybrid power mode, characterized in that: The method comprises: When it is detected that environmental conditions reach a critical condition for switching between series and parallel modes during driving of the vehicle, obtaining a slope parameter of the road condition and an acceleration parameter of the vehicle or a pedal opening change parameter, wherein the driving mode of the vehicle is in the parallel mode during driving; Determining whether the slope parameter is greater than a preset slope; If yes, detecting whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold; If the result of either of the two judgments is yes, the vehicle is controlled to maintain running in the parallel mode for a set period of time.

2. The method according to claim 1, characterized in that The method further comprises: When the slope parameter is less than the preset slope, detecting whether the acceleration parameter is greater than the first threshold, or whether the pedal opening change parameter is greater than the second threshold; If the result of either of the two judgments is yes, the vehicle is controlled to maintain running in the parallel mode for a set period of time.

3. The method according to claim 1, characterized in that The environmental conditions include the altitude of the vehicle's environment; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that the altitude of the vehicle exceeds an altitude threshold.

4. The method according to claim 1, wherein The environmental condition includes a first temperature of an environment in which the vehicle is located; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that a first temperature of an environment in which the vehicle is located exceeds a first preset temperature range.

5. The method according to claim 1, wherein The environmental conditions include a battery charge parameter SOC on the vehicle; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that the battery SOC percentage is lower than the charge threshold.

6. The method according to claim 1, characterized in that The environmental condition includes a second temperature of a battery on the vehicle; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that a second temperature of the battery exceeds a second preset temperature range.

7. The method according to any one of claims 1 to 6, characterized in that After controlling the vehicle to maintain driving in the parallel mode for a set period of time, the method further includes: The driving mode of the vehicle is switched from the parallel mode to the series mode.

8. The method according to claim 1 or 2, characterized in that During the driving process of the vehicle, when the preset conditions are met, the driving mode of the vehicle is controlled to be the parallel mode, The preset conditions include one or more of the following: The vehicle speed is greater than the speed threshold; The vehicle is in forward gear; The battery SOC percentage on the vehicle is higher than the power threshold; The vehicle's driving mode is in pure electric driving mode; There was no clutch failure on the vehicle; The engine on the vehicle is in a fired state and the vehicle's fuel level is above a fuel level threshold.

9. A hybrid power mode control device, characterized in that: The device comprises: an acquisition module, configured to acquire a road slope parameter and a vehicle acceleration parameter or a pedal opening change parameter when detecting that environmental conditions reach a critical condition for switching between series and parallel modes during vehicle driving, wherein the vehicle driving mode is in parallel mode during driving; A judging module, configured to judge whether the slope parameter is greater than a preset slope; a detection module, configured to detect whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold, when the second processing module determines that the acceleration parameter is greater than a first threshold; The control module is configured to control the vehicle to maintain traveling in the parallel mode for a set period of time if any one of the two judgments in the third processing module is yes.

10. The device according to claim 9, characterized in that The judging module is further configured to judge whether the slope parameter is less than a preset slope; The detection module is further configured to detect whether the acceleration parameter is greater than a first threshold, or whether the pedal opening change parameter is greater than a second threshold when the judgment module determines that the acceleration parameter is greater than a first threshold; The control module is further configured to control the vehicle to maintain driving in the parallel mode for a set period of time when the detection module detects that any one of the two judgments is yes.

11. The device according to claim 9, characterized in that The environmental conditions include the altitude of the vehicle's environment; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that the altitude of the vehicle exceeds an altitude threshold.

12. The device according to claim 9, characterized in that The environmental condition includes a first temperature of an environment in which the vehicle is located; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that a first temperature of an environment in which the vehicle is located exceeds a first preset temperature range.

13. The device according to claim 9, characterized in that The environmental conditions include a battery charge parameter SOC on the vehicle; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that the battery SOC percentage is lower than the charge threshold.

14. The device according to claim 9, characterized in that The environmental condition includes a second temperature of a battery on the vehicle; The detecting that the environmental condition reaches the critical condition for switching between series and parallel modes includes: It is detected that a second temperature of the battery exceeds a second preset temperature range.

15. The device according to any one of claims 9 to 14, characterized in that The control module is further configured to switch the driving mode of the vehicle from the parallel mode to the series mode after controlling the vehicle to maintain driving in the parallel mode for a set period of time.

16. The device according to claim 9 or 10, characterized in that The control module is further configured to control the driving mode of the vehicle to be a parallel mode when a preset condition is met during the driving process of the vehicle. The preset conditions include one or more of the following: The vehicle speed is greater than the speed threshold; The vehicle is in forward gear; The battery SOC percentage on the vehicle is higher than the power threshold; The vehicle's driving mode is in pure electric driving mode; There was no clutch failure on the vehicle; The engine on the vehicle is in a fired state and the vehicle's fuel level is above a fuel level threshold.

17. A power controller, characterized in that: comprising a memory and a processor, wherein the memory and the processor are connected; The memory stores computer instructions; The processor executes the computer instructions to perform the hybrid mode control method according to any one of claims 1 to 8.

18. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the hybrid power mode control method according to any one of claims 1 to 8.

19. A hybrid power mode control system, characterized in that: Includes power controller, transmission controller, clutch, battery, power distribution unit, electric motor, generator and engine; The power controller is connected to the transmission controller, the transmission controller is connected to the clutch, the clutch is connected to the engine and the generator respectively, the generator is connected to the battery via the power distribution unit, and the battery is connected to the electric motor; The power controller is configured to execute the hybrid power mode control method according to any one of claims 1 to 8.

20. A vehicle, characterized in that: A hybrid mode control system comprising the hybrid mode control system as claimed in claim 19.

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