Method for determining engine speed of hybrid vehicle, vehicle and storage medium

Abstract

The present application provides a method for determining the engine speed of a hybrid vehicle, a vehicle and a storage medium, belonging to the field of automobile technology, the method comprising: when the vehicle is traveling in series mode, determining the vehicle's driving power requirement according to the vehicle's wheel-end required torque, wheel speed and driving efficiency; correcting the driving power requirement according to the vehicle's driving state to obtain the vehicle's driving power requirement; determining the vehicle's charging power consumption according to the vehicle's battery remaining power, driving environment parameters and device consumption parameters; determining the series required power generation according to the vehicle's driving power requirement and charging power consumption; determining the vehicle's engine target speed according to the vehicle's driving state and required power generation. Through the present application, the requirements for power generation of the vehicle's driving state and actual power demand are comprehensively considered, and dynamic control of the series engine speed is achieved, which reduces energy consumption and improves driving performance and vehicle experience.

Description

Technical Field

[0001] The present application belongs to the field of automobile technology, and in particular, relates to a method for determining an engine speed of a hybrid vehicle, a vehicle, and a storage medium. Background Art

[0002] In order to comply with the concept of sustainable development, the automotive industry is also paying more and more attention to the development of the new energy vehicle industry. Hybrid vehicles add electric assistance on the basis of retaining the power provided by the engine, which can achieve pure electric drive, pure oil drive and dual-power hybrid drive. The current common driving modes mainly include pure electric mode, series mode and direct drive mode.

[0003] When the vehicle is in series mode, the engine drives the generator to generate electricity to charge the battery and drive the vehicle. In order to ensure the vehicle's power and the remaining battery power level, it is necessary to calculate the engine speed in series mode. Summary of the invention

[0004] The purpose of the present application is to provide a method for determining the engine speed of a hybrid vehicle, a vehicle and a storage medium, aiming to solve the problem of inaccurate calculation of the engine speed in traditional hybrid vehicles.

[0005] A first aspect of an embodiment of the present application provides a method for determining an engine speed of a hybrid vehicle, the method comprising:

[0006] When the vehicle is traveling in a series mode, determining a required driving power of the vehicle according to a required wheel end torque, a wheel speed and a driving efficiency of the vehicle;

[0007] According to the driving state of the vehicle, the driving demand power is corrected to obtain the vehicle driving demand power;

[0008] Determining the charging power consumption of the vehicle according to the remaining battery power of the vehicle, driving environment parameters and device consumption parameters;

[0009] Determining the required series power generation according to the vehicle driving required power and the charging consumption power;

[0010] A target engine speed of the vehicle is determined according to the driving state of the vehicle and the required power generation power.

[0011] In some embodiments, determining the target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power includes:

[0012] When the vehicle is in an idle state, the maximum engine speed is determined according to the engine water temperature, the remaining battery power, the atmospheric pressure and the required power generation of the series connection;

[0013] When the maximum engine speed is greater than a first preset value, the first target speed is determined as the engine target speed; when the maximum engine speed is less than a second preset value, the second target speed is determined as the engine target speed; when the maximum engine speed is less than the first preset value but greater than the second preset value, the target speed at the previous moment is maintained;

[0014] The first preset value is greater than the second preset value, and the second target speed is less than the first target speed.

[0015] In some embodiments, determining the maximum engine speed according to the engine water temperature, the remaining battery power, the atmospheric pressure and the required series power generation power includes:

[0016] Determining a first idle speed corresponding to the engine water temperature according to a correspondence between the engine water temperature and the idle speed;

[0017] Determining a second idle speed corresponding to the remaining battery power according to a correspondence between the remaining battery power and the idle speed;

[0018] Determining a third idle speed corresponding to the atmospheric pressure and the series required power generation according to the corresponding relationship between the atmospheric pressure, the series required power generation and the idle speed;

[0019] The maximum engine speed is obtained by determining a maximum value from among the first idle speed, the second idle speed, and the third idle speed.

[0020] In some embodiments, determining the target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power includes:

[0021] When the vehicle is in a non-idling state, determining a minimum engine speed according to the vehicle speed, the required series power generation and the accelerator pedal opening;

[0022] determining an engine assist speed based on a vehicle speed and an engine intake temperature of the vehicle;

[0023] The sum of the minimum engine speed and the engine assist speed is determined as the engine target speed.

[0024] In some embodiments, determining the minimum engine speed according to the vehicle speed, the series required power generation power and the accelerator pedal opening includes:

[0025] Determine a first series connection speed corresponding to the vehicle speed and the series connection required power generation according to the corresponding relationship among the vehicle speed, the series connection required power generation and the series connection speed;

[0026] Determining a second tandem speed corresponding to the vehicle speed and the pedal opening according to a correspondence between the vehicle speed, the pedal opening and the tandem speed;

[0027] The minimum engine speed is determined based on the first series speed and the second series speed.

[0028] In some embodiments, determining the minimum engine speed based on the first series speed and the second series speed includes:

[0029] Acquire the engine water temperature and atmospheric pressure of the vehicle;

[0030] determining a first speed correction coefficient based on the engine water temperature, and determining a second speed correction coefficient based on the atmospheric pressure;

[0031] determining a minimum series speed from the first series speed and the second series speed;

[0032] The minimum series speed is corrected based on the first speed correction coefficient and the second speed correction coefficient to obtain the minimum engine speed.

[0033] In some embodiments, the driving demand power is corrected according to the driving state of the vehicle to obtain the vehicle driving demand power, including:

[0034] When the vehicle is not in an idle state, determining a first required corrected power according to a pedal required torque and a vehicle speed of the vehicle;

[0035] Correcting the driving demand power according to the first demand correction power to obtain the vehicle driving demand power;

[0036] When the vehicle is in an idle state, if the vehicle is in a neutral state, there is no need to correct the driving demand power, and the driving demand power is determined as the vehicle driving demand power;

[0037] If the vehicle is in the target driving mode and the gear position of the vehicle is the parking gear, determining a second required corrected power according to the pedal required torque of the vehicle and the remaining battery power;

[0038] The running demand power is corrected according to the second demand correction power to obtain the vehicle driving demand power.

[0039] In some embodiments, determining the charging power consumption of the vehicle according to the remaining battery power of the vehicle, driving environment parameters, and device consumption parameters includes:

[0040] Determine a target power difference between the remaining power of the battery and a preset target power;

[0041] Determine the target charging power corresponding to the target power difference and the current speed of the vehicle according to the corresponding relationship between the power difference, the vehicle speed and the charging power;

[0042] determining a target supplementary charging power according to the driving environment parameters;

[0043] Determining the high-voltage harness power consumption and the resistor power consumption of the vehicle according to the device consumption parameters;

[0044] A sum of the target charging power, the target supplementary charging power, the high-voltage harness consumption power, and the resistor consumption power is determined as charging consumption power of the vehicle.

[0045] A second aspect of an embodiment of the present application provides a device for determining an engine speed of a hybrid vehicle, the device comprising:

[0046] a first determining unit, configured to determine a required driving power of the vehicle according to a wheel end required torque, a wheel speed and a driving efficiency of the vehicle when the vehicle is traveling in a series mode;

[0047] A correction unit, used for correcting the driving demand power according to the driving state of the vehicle to obtain the vehicle driving demand power;

[0048] A second determining unit, configured to determine the charging power consumption of the vehicle according to the remaining battery power of the vehicle, driving environment parameters and device consumption parameters;

[0049] A third determining unit, configured to determine a required series power generation power according to the vehicle driving required power and the charging consumption power;

[0050] The fourth determining unit is used to determine the target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power.

[0051] In some embodiments, the fourth determination unit is used to determine the maximum engine speed according to the engine water temperature, the remaining battery power, the atmospheric pressure and the required series power generation when the driving state of the vehicle is an idle state; when the maximum engine speed is greater than a first preset value, the first target speed is determined as the engine target speed; when the maximum engine speed is less than a second preset value, the second target speed is determined as the engine target speed; when the maximum engine speed is less than the first preset value and greater than the second preset value, the target speed at the previous moment is maintained; wherein, the first preset value is greater than the second preset value, and the second target speed is less than the first target speed.

[0052] In some embodiments, the fourth determination unit is used to determine a first idle speed corresponding to the engine water temperature according to the correspondence between the engine water temperature and the idle speed; determine a second idle speed corresponding to the remaining battery power according to the correspondence between the remaining battery power and the idle speed; determine a third idle speed corresponding to the atmospheric pressure and the required series power generation power according to the correspondence between the atmospheric pressure, the required series power generation power and the idle speed; determine the maximum value from the first idle speed, the second idle speed and the third idle speed to obtain the maximum engine speed.

[0053] In some embodiments, determining the target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power includes:

[0054] When the vehicle is in a non-idling state, determining a minimum engine speed according to the vehicle speed, the required series power generation and the accelerator pedal opening;

[0055] determining an engine assist speed based on a vehicle speed and an engine intake temperature of the vehicle;

[0056] The sum of the minimum engine speed and the engine assist speed is determined as the engine target speed.

[0057] In some embodiments, the fourth determination unit is used to determine a first series speed corresponding to the vehicle speed and the series required power generation according to the correspondence between the vehicle speed, the series required power generation and the series speed; determine a second series speed corresponding to the vehicle speed and the pedal opening according to the correspondence between the vehicle speed, the pedal opening and the series speed; and determine the minimum engine speed based on the first series speed and the second series speed.

[0058] In some embodiments, the fourth determination unit is used to obtain the engine water temperature and atmospheric pressure of the vehicle; determine a first speed correction coefficient based on the engine water temperature, and determine a second speed correction coefficient based on the atmospheric pressure; determine a minimum series speed from the first series speed and the second series speed; and correct the minimum series speed based on the first speed correction coefficient and the second speed correction coefficient to obtain the minimum engine speed.

[0059] In some embodiments, the correction unit is used to determine a first demand correction power according to the pedal demand torque and vehicle speed of the vehicle when the vehicle is not in an idle state; correct the driving demand power according to the first demand correction power to obtain the vehicle driving demand power; when the vehicle is in an idle state, if the vehicle is in a neutral state, there is no need to correct the driving demand power, and the driving demand power is determined as the vehicle driving demand power; if the vehicle is in a target driving mode and the gear position of the vehicle is a parking gear, determine a second demand correction power according to the pedal demand torque and the remaining battery power of the vehicle; correct the driving demand power according to the second demand correction power to obtain the vehicle driving demand power.

[0060] In some embodiments, the second determination unit is used to determine a target power difference between the remaining battery power and a preset target power; determine the target power difference and the target charging power corresponding to the current speed of the vehicle according to the corresponding relationship between the power difference, the vehicle speed and the charging power; determine the target supplementary charging power according to the driving environment parameters; determine the high-voltage wiring harness power consumption and the resistor power consumption of the vehicle according to the device consumption parameters; and determine the sum of the target charging power, the target supplementary charging power, the high-voltage wiring harness power consumption and the resistor power consumption as the charging power consumption of the vehicle.

[0061] A third aspect of an embodiment of the present application provides a vehicle, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for determining the engine speed of a hybrid vehicle as described above is implemented.

[0062] A fourth aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for determining the engine speed of a hybrid vehicle as described above is implemented.

[0063] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0064] In an embodiment of the present application, different methods are selected to correct the vehicle's driving power requirements according to the vehicle's driving status to obtain the vehicle's driving power requirements, and the vehicle's charging power consumption is determined in combination with the battery's remaining power, driving environment parameters, and device consumption parameters. In this way, the vehicle's actual required power generation power is determined based on the vehicle's driving power requirements and charging power consumption power, and the engine speed is determined in combination with the vehicle's driving status and the required power generation power. The driving status of the vehicle and the actual power demand for power generation power are comprehensively considered, and dynamic control of the series engine speed is achieved, which reduces energy consumption while improving driving performance and vehicle experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 A schematic diagram of a system involved in a method for determining an engine speed of a hybrid vehicle provided by an exemplary embodiment is shown;

[0066] Figure 2 A schematic flow chart of a method for determining an engine speed of a hybrid vehicle provided by an exemplary embodiment is shown;

[0067] Figure 3 A logic diagram of determining a vehicle driving demand torque provided by an exemplary embodiment is shown;

[0068] Figure 4 A logical schematic diagram of series demanded power generation provided by an exemplary embodiment is shown;

[0069] Figure 5 A schematic flow chart of a method for determining an engine speed of a hybrid vehicle provided by an exemplary embodiment is shown;

[0070] Figure 6 A logic diagram for determining engine transfer reading in series mode provided by an exemplary embodiment is shown;

[0071] Figure 7 A schematic structural diagram of an engine speed determination device for a hybrid vehicle provided by an exemplary embodiment is shown;

[0072] Figure 8 It is a schematic diagram of the structure of a vehicle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0073] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] Since traditional energy such as oil is a non-renewable energy, vehicles that use traditional energy such as oil as a power source do not conform to the concept of sustainable development. In the automotive industry, more and more attention is paid to the development of new energy vehicles. Hybrid vehicles achieve the purpose of oil and electricity by adding a hybrid system to the original traditional power system. In addition, due to its low fuel consumption and high driving performance, it has become one of the current mainstream models.

[0076] Hybrid vehicles combine traditional fuel power with electric power by adding a hybrid system to better improve vehicle performance. The engine and vehicle battery jointly provide power for the vehicle, which improves the comfort of the vehicle and enhances the user experience.

[0077] Since hybrid vehicles add electric power to the original traditional power system, they can achieve pure electric drive, pure oil drive and dual-power hybrid drive. The current common drive modes mainly include pure electric mode, series mode and direct drive mode. Different drive modes can be selected according to different driving conditions and other conditions, and the drive mode can be switched at the right time.

[0078] Among them, when the vehicle is in series mode, the engine speed of the vehicle needs to be controlled. Different engine speeds will have different effects on the vehicle's fuel consumption level and noise, vibration and harshness (NVH).

[0079] In some embodiments, when the vehicle is traveling in series mode, the engine speed of the vehicle is determined according to the pedal demand. This method of determining the engine speed only considers the pedal demand of the vehicle, and the factors considered are relatively single, which is not conducive to the driving performance and energy consumption requirements of the vehicle.

[0080] The present application provides a method for determining the engine speed in a hybrid vehicle, a vehicle and a storage medium. According to the driving state of the vehicle, different methods are selected to correct the driving power requirement of the vehicle to obtain the driving power requirement of the vehicle, and the charging power consumption of the vehicle is determined in combination with the remaining power of the battery, the driving environment parameters and the device consumption parameters. In this way, the actual required power generation power of the vehicle is determined according to the driving power requirement and the charging power consumption of the vehicle, and the engine speed is determined in combination with the driving state of the vehicle and the required power generation power. The driving state of the vehicle and the actual power demand for the power generation power are comprehensively considered, and the dynamic control of the series engine speed is realized, which reduces energy consumption while improving driving performance and vehicle experience.

[0081] See also Figure 1 , which shows a schematic diagram of a system involved in a method for determining the engine speed of a hybrid vehicle provided by an exemplary embodiment. The system includes: a driving parameter sensing system 10, a vehicle controller 20 and a hybrid power system 30. The vehicle controller 20 is connected to the driving parameter sensing system 10 and the hybrid power system 30 respectively.

[0082] The driving parameter sensing system 10 is used to obtain the driving parameters of the vehicle and send the driving parameters to the vehicle controller 20. The driving parameter sensing system 10 includes a variety of sensors or other devices for obtaining different driving parameters of the vehicle. For example, the driving parameter sensing system 10 includes a vehicle speed sensor for detecting the driving speed of the vehicle and sending the driving speed of the vehicle to the vehicle controller. The driving parameter sensing system 10 also includes a slope sensor for detecting the driving slope of the vehicle and sending the driving slope to the vehicle controller 20. The driving parameter sensing system 10 also includes a temperature sensor for detecting the battery temperature of the vehicle and sending the battery temperature to the vehicle controller 20. The driving parameter sensing system 10 also includes an atmospheric pressure sensor for detecting the atmospheric pressure of the vehicle's current environment and sending the atmospheric pressure to the vehicle controller 20. The driving parameter sensing system 10 may include more or fewer devices, which are not specifically limited in the embodiments of the present application.

[0083] The vehicle controller 20 is used to receive the driving parameters of the vehicle, determine the target engine speed of the vehicle in the series mode according to the driving parameters of the vehicle, and send the target engine speed to the hybrid system 30. The hybrid system 30 includes an engine and a generator, which are used to receive the target engine speed sent by the vehicle controller 20 and control the engine speed based on the target engine speed.

[0084] The following describes a method for determining the engine speed in a hybrid vehicle in conjunction with a specific method embodiment. Figure 2, which shows a flow chart of a method for determining the engine speed of a hybrid vehicle provided by an exemplary embodiment. As an example and not a limitation, the method is applied in a vehicle.

[0085] S201, when the vehicle is traveling in a series mode, the vehicle determines the required driving power of the vehicle according to the required wheel end torque, wheel speed and driving efficiency of the vehicle.

[0086] The wheel end required torque can be calculated based on the engine required torque, and the engine required torque can be obtained based on the vehicle's driving parameter sensing system. In the embodiment of the present application, the method for determining the wheel end required torque is not specifically limited. The wheel speed can be determined based on the vehicle's driving parameter sensing system. The driving power can be determined based on the vehicle's calibrated driving efficiency.

[0087] The vehicle determines the power corresponding to the wheel end torque requirement and wheel speed according to the calculation formula of power, speed and torque. The calculation formula is power = wheel end torque requirement * wheel speed / 9550. Since the vehicle will produce losses when outputting power, it is necessary to adjust the power according to the driving efficiency to obtain the driving power requirement of the vehicle.

[0088] See also Figure 3 , which shows a logic diagram of determining a vehicle driving demand torque provided by an exemplary embodiment. The wheel end demand torque is multiplied by the wheel speed, divided by 9550, and then divided by the driving efficiency to calculate the vehicle's driving demand power.

[0089] S202: The vehicle corrects the driving demand power according to the driving state of the vehicle to obtain the vehicle driving demand power.

[0090] The vehicle determines the current driving state according to the driving parameters, and then selects different correction coefficients according to different driving states to correct the driving demand power to obtain the vehicle driving demand power.

[0091] The driving parameters include the gear information and speed of the vehicle. When the gear information indicates that the vehicle is currently in the parking gear or neutral gear, and the speed is less than the preset speed, it is determined that the vehicle is in the idling state. When the gear information indicates that the vehicle is not currently in the parking gear or neutral gear, or the speed is greater than or equal to the preset speed, it is determined that the vehicle is in the driving state.

[0092] The preset speed can be set as needed, and in the embodiment of the present application, the preset speed is not specifically limited. For example, the preset speed can be 2 kilometers per hour, 2.5 kilometers per hour, or 3 kilometers per hour.

[0093] In some embodiments, when the vehicle is not in an idle state, a first demand correction power is determined based on the pedal demand torque and vehicle speed of the vehicle; the driving demand power is corrected based on the first demand correction power to obtain the vehicle driving demand power.

[0094] When the vehicle is not in an idle state, the vehicle determines a first required corrected power corresponding to the pedal required torque and the vehicle speed from a correspondence between the pedal required torque, the vehicle speed and the corrected power according to the pedal required torque and the vehicle speed.

[0095] In some embodiments, when the vehicle is idling in situ, if the vehicle is in neutral, there is no need to correct the driving demand power, and the driving demand power is determined as the vehicle driving demand power; if the vehicle is in the target driving mode and the gear position of the vehicle is the parking gear, the second demand correction power is determined according to the pedal demand torque and the remaining battery power of the vehicle; the driving demand power is corrected according to the second demand correction power to obtain the vehicle driving demand power.

[0096] When the vehicle is in a stationary idling state, the vehicle first determines the gear information and driving mode of the vehicle. When the gear information indicates that the vehicle is currently in the parking gear and the driving mode is the target driving mode, the vehicle's current pedal demand torque and battery remaining power correspond to the second required corrected power according to the corresponding relationship between the vehicle's pedal demand torque, battery remaining power and corrected power. The target driving mode refers to a mode that generates greater power consumption, for example, the target driving mode is a snow, mud and sand mode.

[0097] When the gear information of the vehicle indicates that the vehicle is in neutral or the driving mode of the vehicle is not the target driving mode, it is determined that the vehicle has no other torque demand, and the vehicle does not need to perform power correction.

[0098] Among them, the pedal demand torque can be determined according to the pedal opening. Accordingly, the vehicle obtains the current pedal opening of the vehicle, and determines the pedal demand torque according to the pedal opening. In some embodiments, the vehicle determines the pedal demand torque corresponding to the pedal opening according to the correspondence between the pedal opening and the pedal demand torque calibrated in advance. In some embodiments, the vehicle can calculate the pedal demand torque corresponding to the pedal opening through a torque calculation module. In the embodiments of the present application, the method for obtaining the pedal demand torque is not specifically limited.

[0099] See also Figure 3When the vehicle speed is less than the preset speed and the gear is in neutral or parking, a selection signal 1 is output; when the vehicle speed is greater than or equal to the preset speed, or the gear is not in neutral or parking, a selection signal 0 is output. The output selection signal is input into the selector. When the selection signal is 0, the first demand correction power determined according to the pedal demand torque and the vehicle speed is output. When the selection signal is 1, it continues to determine whether the gear of the vehicle is the parking gear, and whether the driving mode of the vehicle is the target driving mode. If the gear of the vehicle is the parking gear and the driving mode of the vehicle is the target driving mode, a selection signal 1 is output, otherwise a selection signal 0 is output. The output selection signal is input into the selector. When the selection signal is 0, the output demand correction power is 0, that is, the demand power is not corrected; when the selection signal is 1, the second demand correction power determined according to the pedal demand torque and the remaining battery power is output. That is, when the vehicle is not in an idle state, the driving demand power is corrected by the first demand correction power. When the vehicle is in an idle state, in the parking gear, and the driving mode is the target driving mode, the driving demand power is corrected by the second demand correction power.

[0100] Among them, correcting the driving demand power by using the first demand correction power or the second demand correction power means summing the first demand correction power or the second demand correction power with the driving demand power to obtain the vehicle driving demand power.

[0101] In this implementation, the vehicle's driving power requirement is corrected according to the vehicle's driving status so that the determined driving power requirement can meet the vehicle's driving mode requirements. When the vehicle is idling, the battery characteristics are used to limit the required power to avoid overcharging.

[0102] It should be noted that before the vehicle outputs the required vehicle driving power, the required vehicle driving torque may be limited to ensure that the required vehicle driving power is within a reasonable range. Figure 3 After the driving demand power is corrected, if the corrected driving demand power is greater than the first demand power and less than the second demand power, the corrected driving demand power is determined as the vehicle driving demand power. If the corrected driving demand power is less than or equal to the first demand power, the first demand power is determined as the vehicle driving demand power. If the corrected driving demand power is greater than or equal to the second demand power, the second demand power is determined as the vehicle driving demand power.

[0103] Among them, the first power requirement is less than the second power requirement, and the first power requirement and the second power requirement can be set as needed. In the embodiment of the present application, the values ​​of the first power requirement and the second power requirement are not specifically limited. For example, the first power requirement is 0, and the second power requirement is 85 kW, 90 kW, etc. In this way, it is prevented that the output vehicle drive demand power is less than 0 due to failures in the vehicle signal transmission process, or that the output vehicle drive demand power is too large, resulting in excessive engine load.

[0104] S203, the vehicle determines the charging power consumption of the vehicle according to the remaining battery power of the vehicle, driving environment parameters and device consumption parameters.

[0105] The charging power consumption includes target charging power, target supplementary charging power, high-voltage harness power consumption and resistor power consumption.

[0106] The target charging power can be determined based on the current remaining power of the battery. Accordingly, in some embodiments, the vehicle determines the target power difference between the remaining power of the battery and a preset target power; and determines the target power difference and the target charging power corresponding to the current speed of the vehicle based on the corresponding relationship between the power difference, the vehicle speed and the charging power.

[0107] Among them, the target power can be set as needed, and in the embodiment of the present application, the target power is not specifically limited. For example, the target power can be 75%, 80% or 85%, etc. In the embodiment of the present application, the vehicle determines the target charging power corresponding to the calibrated power difference and the current speed of the vehicle through the correspondence between the power difference, the vehicle speed and the charging power, based on the target power difference between the remaining power of the battery and the preset target power. The correspondence between the power difference, the vehicle speed and the charging power can be a corresponding relationship for achieving calibration. In the embodiment of the present application, the calibration method of the corresponding relationship is not specifically limited.

[0108] One thing to note is that see Figure 4 , which shows a logical schematic diagram of the series demand power generation provided by an exemplary embodiment. After the target charging power is determined according to the target power difference and the vehicle speed, the target charging power can also be corrected according to parameters such as the engine water temperature and the battery performance. Accordingly, the vehicle obtains the engine water temperature, and determines the first correction coefficient according to the correspondence between the engine water temperature and the correction coefficient; the vehicle obtains the remaining battery power and the battery temperature, and determines the second correction coefficient according to the correspondence between the remaining battery power, the battery temperature and the correction coefficient; the product of the target charging power and the first correction coefficient and the second correction coefficient is determined as the corrected target charging power.

[0109] Among them, the correspondence between the engine water temperature and the correction coefficient and the remaining battery power can be a pre-calibrated correspondence. Accordingly, the developer can calibrate the correspondence between the engine water temperature and the correction coefficient for the purpose of reducing the vehicle power demand. For example, when the engine water temperature is within the normal temperature range, the engine works normally, so the corresponding correction coefficient can be set to 1. When the engine water temperature is outside the normal temperature range, the engine load needs to be reduced, so the corresponding correction coefficient can be set to a value less than 1. Among them, the normal temperature range can be set as needed, for example, the normal temperature range is 50℃-110℃, etc.

[0110] Similarly, the correspondence between battery temperature, battery remaining power and correction coefficient can be a pre-calibrated correspondence. Accordingly, developers can calibrate the correspondence between battery temperature, battery remaining power and correction coefficient for the purpose of reducing vehicle power demand and ensuring battery safety. For example, when the battery temperature is lower, the battery performance is worse. In order to protect the battery, the battery correction coefficient is set to a value less than 1. When the battery remaining power is too low, it means that the battery can be charged. At this time, the battery correction coefficient can be set to a value greater than 1.

[0111] In this implementation, the target charging power is corrected by the engine water temperature and the battery performance, thereby ensuring the safe operation of the battery and the engine.

[0112] The target supplementary charging power can be determined according to the driving environment of the vehicle. Accordingly, the vehicle determines the target supplementary charging power according to the driving environment parameters.

[0113] In some embodiments, the driving environment parameters include road slope, atmospheric pressure, driving mode, etc. Figure 4 The vehicle determines the first supplementary charging power corresponding to the current road slope according to the corresponding relationship between the road slope and the charging power; determines the second supplementary charging power corresponding to the current atmospheric pressure according to the corresponding relationship between the atmospheric pressure and the charging power; and determines the third supplementary charging power corresponding to the current target electric quantity difference and the driving mode according to the corresponding relationship between the electric quantity difference, the driving mode and the charging power. The vehicle determines the sum of the first supplementary charging power, the second supplementary charging power and the third supplementary charging power as the target supplementary charging power.

[0114] Among them, the correspondence between road slope and charging power, the correspondence between atmospheric pressure and charging power and the power difference, and the correspondence between driving mode and charging power can be pre-calibrated correspondences.

[0115] The high-voltage harness power consumption and the resistor power consumption can be determined according to the period consumption parameter. Accordingly, the vehicle determines the high-voltage harness power consumption and the resistor power consumption of the vehicle according to the device consumption parameter. In some embodiments, the vehicle analyzes the device consumption parameter to obtain the high-voltage harness power consumption and the resistor power consumption of the vehicle.

[0116] In order to make the obtained high-voltage harness power consumption and resistor power consumption more accurate, the analyzed high-voltage harness power consumption and resistor power consumption can also be corrected. Figure 4 The vehicle determines a third correction coefficient corresponding to the difference between the current vehicle speed and the target power according to the corresponding relationship among the vehicle speed, the power difference and the correction coefficient, and determines the product of the third correction coefficient and the analyzed power consumption of the high-voltage wiring harness as the power consumption of the high-voltage wiring harness; the vehicle determines a fourth correction coefficient corresponding to the current battery remaining power and the battery temperature according to the corresponding relationship among the battery remaining power, the battery temperature and the correction coefficient, and determines the product of the fourth correction coefficient and the analyzed power consumption of the resistor as the power consumption of the resistor.

[0117] After the vehicle determines the target charging power, the target supplementary charging power, the high-voltage harness power consumption and the resistor power consumption, the sum of the target charging power, the target supplementary charging power, the high-voltage harness power consumption and the resistor power consumption is determined as the charging power consumption of the vehicle.

[0118] It should be noted that the conditions for determining the correction coefficient provided in the embodiments of the present application are merely examples of the present application and are not limitations of the present application. In actual applications, other correction conditions may be used to determine the correction coefficient to correct the relevant power parameters.

[0119] S204: The vehicle determines the required series power generation power according to the required driving power of the vehicle and the charging power consumption.

[0120] In some embodiments, the vehicle determines the sum of the vehicle demand power and the charging consumption power as the series demand power generation power.

[0121] In other embodiments, please continue to refer to Figure 4, the vehicle also limits the required power generation in series according to the battery. Accordingly, the vehicle determines the first charging power limit value corresponding to the target power difference and the current vehicle speed according to the correspondence between the power difference, the vehicle speed and the charging power limit value; and determines the second charging limit value corresponding to the current battery remaining power and the vehicle speed according to the correspondence between the battery remaining power, the vehicle speed and the charging power limit value. The maximum charging limit value is determined from the first charging limit value and the second charging limit value, and the maximum limit value is compared with the sum of the vehicle driving demand power and the charging consumption power, and the maximum value of the two is determined as the required power generation in series.

[0122] In some embodiments, the vehicle further corrects the maximum charging limit value according to the remaining battery power and the battery temperature. The vehicle determines a fifth correction coefficient corresponding to the current remaining battery power and the battery temperature according to the corresponding relationship among the remaining battery power, the battery temperature and the correction coefficient, and determines the product of the fifth correction number and the maximum charging limit value as the required power generation power in series.

[0123] Among them, the corresponding relationship between the power difference, the vehicle speed and the charging power limit value, the remaining battery power, the corresponding relationship between the vehicle speed and the charging power limit value and the remaining battery power, the battery temperature and the correction coefficient can all be calibrated in advance according to the performance of the vehicle.

[0124] S205: The vehicle determines a target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power.

[0125] The vehicle selects different methods for determining the target engine speed according to different driving conditions to calculate the target engine speed corresponding to the required power generation.

[0126] In an embodiment of the present application, different methods are selected to correct the vehicle's driving power requirements according to the vehicle's driving status to obtain the vehicle's driving power requirements, and the vehicle's charging power consumption is determined in combination with the battery's remaining power, driving environment parameters, and device consumption parameters. In this way, the vehicle's actual required power generation power is determined based on the vehicle's driving power requirements and charging power consumption power, and the engine speed is determined in combination with the vehicle's driving status and the required power generation power. The driving status of the vehicle and the actual power demand for power generation power are comprehensively considered, and dynamic control of the series engine speed is achieved, which reduces energy consumption while improving driving performance and vehicle experience.

[0127] The following describes a method for determining the engine speed in a hybrid vehicle in conjunction with a specific embodiment of a method for calculating the target engine speed. Figure 5 , which shows a flow chart of a method for determining the engine speed of a hybrid vehicle provided by an exemplary embodiment. As an example and not a limitation, the method is applied in a vehicle.

[0128] S501, when the vehicle is traveling in a series mode, the vehicle determines the required driving power of the vehicle according to the required wheel end torque, wheel speed and driving efficiency of the vehicle.

[0129] The principle of this step is the same as that of step S201 and will not be repeated here.

[0130] S502: The vehicle corrects the driving demand power according to the driving state of the vehicle to obtain the vehicle driving demand power.

[0131] The principle of this step is the same as that of step S202 and will not be repeated here.

[0132] S503, the vehicle determines the charging power consumption of the vehicle according to the remaining battery power of the vehicle, driving environment parameters and device consumption parameters.

[0133] The principle of this step is the same as that of step S203 and will not be repeated here.

[0134] S504: The vehicle determines the required series power generation power according to the required driving power of the vehicle and the charging power consumption.

[0135] The principle of this step is the same as that of step S204 and will not be repeated here.

[0136] It should be noted that the method for the vehicle to determine whether the driving state is idling in place is the same as the principle of determining the driving state of the vehicle in step S202, which will not be repeated here. The vehicle determines whether the vehicle is idling in place based on the gear information and the vehicle speed. In some embodiments, the vehicle can also determine whether the vehicle is in idling in place in combination with the idle flag. Accordingly, the vehicle determines that the vehicle is in place based on the gear information and the vehicle speed, and when the pending flag indicates that the vehicle is idling, it is determined that the vehicle is idling in place. When the vehicle is in idling in place, execute steps S505-S506, and when the vehicle is in a non-idling state, execute steps S507-S509.

[0137] S505, when the vehicle is in the idle state, the vehicle determines the maximum engine speed according to the engine water temperature, the remaining battery power, the atmospheric pressure and the required series power generation power.

[0138] The vehicle determines the idle speed corresponding to the engine water temperature, the idle speed corresponding to the remaining battery power, and the idle speed corresponding to the atmospheric pressure and the required power generation in series, and determines the maximum engine speed from the determined multiple idle speeds. Figure 6The vehicle determines a first idle speed corresponding to the engine water temperature according to the correspondence between the engine water temperature and the idle speed; determines a second idle speed corresponding to the battery remaining power according to the correspondence between the battery remaining power and the idle speed; determines a third idle speed corresponding to the atmospheric pressure and the series required power generation according to the correspondence between the atmospheric pressure, the series required power generation and the idle speed; determines the maximum value from the first idle speed, the second idle speed and the third idle speed to obtain the maximum engine speed.

[0139] S506, when the maximum engine speed is greater than the first preset value, the vehicle determines the first target speed as the engine target speed; when the maximum engine speed is less than the second preset value, the vehicle determines the second target speed as the engine target speed; when the maximum engine speed is less than the first preset value and greater than the second preset value, the target speed at the previous moment is maintained.

[0140] Among them, the first preset value is greater than the second preset value, and the second target speed is less than the first target speed. The first preset value, the second preset value, the first target speed and the second target speed can be set as needed. In the embodiment set of the present application, the first preset value, the second preset value, the first target speed and the second target speed are not specifically limited. For example, the first preset value is 1400 rpm, 1450 rpm, etc. The second preset value is 1200 rpm, 1100 rpm, etc. The first target speed is 1500 rpm, 1550 rpm, etc., and the second target speed is 1050 rpm, 1000 rpm, etc.

[0141] After the vehicle determines the maximum engine speed, it compares the maximum engine speed with a first preset value and a second preset value. When the maximum engine speed is greater than the first preset value, the vehicle determines the first target speed as the engine target speed. When the maximum engine speed is less than the second preset value, the vehicle determines the second target speed as the engine target speed. When the maximum engine speed is less than the first preset value and greater than the second preset value, the target speed at the previous moment is maintained.

[0142] In this implementation, the maximum engine speed is limited by a first preset value and a second preset value, so that the vehicle runs at a lower target speed when idling in situ, thereby reducing the energy consumption of the engine when idling in situ.

[0143] S507, when the driving state of the vehicle is a non-idling state, the vehicle determines the minimum engine speed according to the vehicle speed, the required series power generation power and the accelerator pedal opening.

[0144] The vehicle determines the series speed corresponding to the vehicle speed and the series required power generation, and the series speed corresponding to the vehicle speed and the accelerator pedal opening, and determines the minimum engine speed from the determined multiple series speeds. Figure 6 The vehicle determines a first series speed corresponding to the vehicle speed and the required series power generation according to the correspondence between the vehicle speed, the required series power generation and the series speed; determines a second series speed corresponding to the vehicle speed and the pedal opening according to the correspondence between the vehicle speed, the pedal opening and the series speed; and determines the minimum engine speed based on the first series speed and the second series speed.

[0145] In some embodiments, the vehicle can also correct the minimum engine speed. Accordingly, the vehicle obtains the engine water temperature and atmospheric pressure of the vehicle; determines a first speed correction coefficient based on the engine water temperature, and determines a second speed correction coefficient based on the atmospheric pressure; determines the minimum series speed from the first series speed and the second series speed; corrects the minimum series speed based on the first speed correction coefficient and the second speed correction coefficient to obtain the minimum engine speed.

[0146] The minimum engine speed is determined as the product of the vehicle minimum series speed, the first speed correction factor and the second speed correction factor.

[0147] In this implementation, when the vehicle is in a non-stationary idling state, the series speed is determined based on the series required power generation and the accelerator pedal opening, and the series speed is corrected by the engine water temperature and atmospheric pressure, ensuring the driving experience of the vehicle in a non-stationary idling state.

[0148] S508: The vehicle determines the engine assist speed based on the vehicle speed and the engine intake temperature.

[0149] When the vehicle is in a non-stationary idling condition, the engine auxiliary speed is determined based on the vehicle speed and the engine intake temperature. By increasing the auxiliary speed, the power consumption of the engine is reduced.

[0150] In some embodiments, the vehicle may also correct the auxiliary speed. Accordingly, after the vehicle determines a correction coefficient based on the battery power, the product of the correction coefficient and the auxiliary speed is determined as the corrected auxiliary speed.

[0151] S509: The vehicle determines the sum of the minimum engine speed and the engine auxiliary speed as the engine target speed.

[0152] In an embodiment of the present application, different methods are selected to correct the vehicle's driving power requirements according to the vehicle's driving status to obtain the vehicle's driving power requirements, and the vehicle's charging power consumption is determined in combination with the battery's remaining power, driving environment parameters, and device consumption parameters. In this way, the vehicle's actual required power generation power is determined based on the vehicle's driving power requirements and charging power consumption power, and the engine speed is determined in combination with the vehicle's driving status and the required power generation power. The driving status of the vehicle and the actual power demand for power generation power are comprehensively considered, and dynamic control of the series engine speed is achieved, which reduces energy consumption while improving driving performance and vehicle experience.

[0153] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0154] See also Figure 7 , which shows a schematic diagram of the structure of a hybrid vehicle engine speed determination device provided by the present application, and includes various units for executing various steps in the above embodiments, see Figure 7 , the device for determining the engine speed in the hybrid vehicle comprises:

[0155] A first determining unit 701 is used to determine the required driving power of the vehicle according to the required wheel end torque, wheel speed and driving efficiency of the vehicle when the vehicle is traveling in a series mode;

[0156] The correction unit 702 is used to correct the driving demand power according to the driving state of the vehicle to obtain the vehicle driving demand power;

[0157] The second determining unit 703 is used to determine the charging power consumption of the vehicle according to the remaining battery power of the vehicle, the driving environment parameters and the device consumption parameters;

[0158] The third determining unit 704 is used to determine the required series power generation power according to the vehicle driving required power and the charging consumption power;

[0159] The fourth determining unit 705 is used to determine the target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power.

[0160] In some embodiments, the fourth determination unit 705 is used to determine the maximum engine speed according to the engine water temperature, the remaining battery power, the atmospheric pressure and the required series power generation when the driving state of the vehicle is an idle state; when the maximum engine speed is greater than a first preset value, the first target speed is determined as the engine target speed; when the maximum engine speed is less than a second preset value, the second target speed is determined as the engine target speed; when the maximum engine speed is less than the first preset value and greater than the second preset value, the target speed at the previous moment is maintained; wherein, the first preset value is greater than the second preset value, and the second target speed is less than the first target speed.

[0161] In some embodiments, the fourth determination unit 705 is used to determine a first idle speed corresponding to the engine water temperature according to the correspondence between the engine water temperature and the idle speed; determine a second idle speed corresponding to the remaining battery power according to the correspondence between the remaining battery power and the idle speed; determine a third idle speed corresponding to the atmospheric pressure and the required series power generation power according to the correspondence between the atmospheric pressure, the required series power generation power and the idle speed; determine the maximum value from the first idle speed, the second idle speed and the third idle speed to obtain the maximum engine speed.

[0162] In some embodiments, determining the target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power includes:

[0163] When the vehicle is in a non-idling state, the minimum engine speed is determined according to the vehicle speed, the required power generation of the series connection and the accelerator pedal opening;

[0164] Determining an engine assist speed based on a vehicle speed and an engine intake temperature of the vehicle;

[0165] The sum of the minimum engine speed and the engine assist speed is determined as the engine target speed.

[0166] In some embodiments, the fourth determination unit 705 is used to determine a first series speed corresponding to the vehicle speed and the series required power generation according to the correspondence between the vehicle speed, the series required power generation and the series speed; determine a second series speed corresponding to the vehicle speed and the pedal opening according to the correspondence between the vehicle speed, the pedal opening and the series speed; and determine the minimum engine speed based on the first series speed and the second series speed.

[0167] In some embodiments, the fourth determination unit 705 is used to obtain the engine water temperature and atmospheric pressure of the vehicle; determine a first speed correction coefficient based on the engine water temperature, and determine a second speed correction coefficient based on the atmospheric pressure; determine the minimum series speed from the first series speed and the second series speed; correct the minimum series speed based on the first speed correction coefficient and the second speed correction coefficient to obtain the minimum engine speed.

[0168] In some embodiments, the correction unit 702 is used to determine a first demand correction power according to the pedal demand torque and vehicle speed of the vehicle when the vehicle is not in an idle state; correct the driving demand power according to the first demand correction power to obtain the vehicle driving demand power; when the vehicle is in an idle state, if the vehicle is in a neutral state, there is no need to correct the driving demand power, and the driving demand power is determined as the vehicle driving demand power; if the vehicle is in a target driving mode and the gear position of the vehicle is a parking gear, determine a second demand correction power according to the pedal demand torque and the remaining battery power of the vehicle; correct the driving demand power according to the second demand correction power to obtain the vehicle driving demand power.

[0169] In some embodiments, the second determination unit 703 is used to determine a target power difference between the remaining power of the battery and a preset target power; determine the target power difference and the target charging power corresponding to the current speed of the vehicle according to the corresponding relationship between the power difference, the vehicle speed and the charging power; determine the target supplementary charging power according to the driving environment parameters; determine the high-voltage wiring harness power consumption and the resistor power consumption of the vehicle according to the device consumption parameters; and determine the sum of the target charging power, the target supplementary charging power, the high-voltage wiring harness power consumption and the resistor power consumption as the charging power consumption of the vehicle.

[0170] In an embodiment of the present application, different methods are selected to correct the vehicle's driving power requirements according to the vehicle's driving status to obtain the vehicle's driving power requirements, and the vehicle's charging power consumption is determined in combination with the battery's remaining power, driving environment parameters, and device consumption parameters. In this way, the vehicle's actual required power generation power is determined based on the vehicle's driving power requirements and charging power consumption power, and the engine speed is determined in combination with the vehicle's driving status and the required power generation power. The driving status of the vehicle and the actual power demand for power generation power are comprehensively considered, and dynamic control of the series engine speed is achieved, which reduces energy consumption while improving driving performance and vehicle experience.

[0171] Figure 8 FIG. 1 is a schematic diagram of a vehicle provided by an exemplary embodiment of the present application. Figure 8As shown, the vehicle 8 of this embodiment includes: a processor 80, a memory 81, and a computer program 82 stored in the memory 81 and executable on the processor 80, such as a hybrid vehicle engine speed determination program. When the processor 80 executes the computer program 82, the steps of the above-mentioned hybrid vehicle engine speed determination method embodiments are implemented, such as Figure 2 Alternatively, when the processor 80 executes the computer program 82, the functions of each unit in the above-mentioned device embodiments are realized, for example Figure 7 Functions of units 701 to 705 are shown.

[0172] Exemplarily, the computer program 82 may be divided into one or more units, which are stored in the memory 81 and executed by the processor 80 to complete the present application. The one or more units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 82 in the vehicle 8. For example, the computer program 82 may be divided into a first determination unit, a correction unit, a second determination unit, a third determination unit, and a fourth determination unit, and the specific functions of each module are as follows:

[0173] A first determining unit 701 is used to determine the required driving power of the vehicle according to the required wheel end torque, wheel speed and driving efficiency of the vehicle when the vehicle is traveling in a series mode;

[0174] The correction unit 702 is used to correct the driving demand power according to the driving state of the vehicle to obtain the vehicle driving demand power;

[0175] The second determining unit 703 is used to determine the charging power consumption of the vehicle according to the remaining battery power of the vehicle, the driving environment parameters and the device consumption parameters;

[0176] The third determining unit 704 is used to determine the required series power generation power according to the vehicle driving required power and the charging consumption power;

[0177] The fourth determining unit 705 is used to determine the target engine speed of the vehicle according to the driving state of the vehicle and the required power generation power.

[0178] The vehicle 8 may be any vehicle having a control function. The vehicle 8 may include, but is not limited to, a processor 80 and a memory 81. Those skilled in the art will appreciate that Figure 8 It is only an example of the vehicle 8 and does not constitute a limitation of the vehicle 8. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the vehicle 8 may also include input and output devices, network access devices, buses, etc.

[0179] The processor 80 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0180] The memory 81 may be an internal storage unit of the vehicle 8, such as a hard disk or memory of the vehicle 8. The memory 81 may also be an external storage device of the vehicle 8, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the vehicle 8. Further, the memory 81 may include both an internal storage unit of the vehicle 8 and an external storage device. The memory 81 is used to store the computer program and other programs and data required by the terminal device. The memory 81 may also be used to temporarily store data that has been output or is to be output.

[0181] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0182] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0183] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0184] In the embodiments provided in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0185] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0186] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0187] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0188] The embodiments of the present application further provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0189] The embodiment of the present application also provides a computer program product. When the computer program product runs on a mobile terminal, the mobile terminal can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0190] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for determining the engine speed of a hybrid vehicle, characterized in that: The method comprises: When the vehicle is traveling in a series mode, determining a required driving power of the vehicle according to a required wheel end torque, a wheel speed and a driving efficiency of the vehicle; When the vehicle is not in an idle state, determining a first demand correction power according to the pedal demand torque and vehicle speed of the vehicle; correcting the driving demand power according to the first demand correction power to obtain the vehicle driving demand power; When the vehicle is in an idle state, if the vehicle is in a neutral state, the driving demand power is determined as the vehicle driving demand power; if the vehicle is in a target driving mode and the gear position of the vehicle is a parking gear, a second demand correction power is determined according to the pedal demand torque of the vehicle and the remaining battery power; the driving demand power is corrected according to the second demand correction power to obtain the vehicle driving demand power, and the target driving mode is a snow, mud and sand mode; Determining the charging power consumption of the vehicle according to the remaining battery power of the vehicle, driving environment parameters and device consumption parameters; Determining the required series power generation according to the vehicle driving required power and the charging consumption power; When the driving state of the vehicle is in the idle state, the maximum engine speed is determined according to the engine water temperature, the remaining battery power, the atmospheric pressure and the required power generation in series; when the maximum engine speed is greater than a first preset value, the first target speed is determined as the engine target speed; when the maximum engine speed is less than a second preset value, the second target speed is determined as the engine target speed; when the maximum engine speed is less than the first preset value but greater than the second preset value, the target speed at the previous moment is maintained; wherein, the first preset value is greater than the second preset value, and the second target speed is less than the first target speed; When the driving state of the vehicle is a non-stationary idling state, the minimum engine speed is determined according to the vehicle speed, the required series power generation power and the accelerator pedal opening; the engine auxiliary speed is determined based on the vehicle speed and the engine intake temperature; and the sum of the minimum engine speed and the engine auxiliary speed is determined as the engine target speed.

2. The method according to claim 1, characterized in that The method of determining the maximum engine speed according to the engine water temperature, the remaining battery power, the atmospheric pressure and the required power generation of the series connection includes: Determining a first idle speed corresponding to the engine water temperature according to a correspondence between the engine water temperature and the idle speed; Determining a second idle speed corresponding to the remaining battery power according to a correspondence between the remaining battery power and the idle speed; Determining a third idle speed corresponding to the atmospheric pressure and the series required power generation according to the corresponding relationship between the atmospheric pressure, the series required power generation and the idle speed; The maximum engine speed is obtained by determining a maximum value from among the first idle speed, the second idle speed, and the third idle speed.

3. The method according to claim 1, characterized in that Determining the minimum engine speed according to the vehicle speed, the required series power generation and the accelerator pedal opening includes: Determine a first series connection speed corresponding to the vehicle speed and the series connection required power generation according to the corresponding relationship among the vehicle speed, the series connection required power generation and the series connection speed; Determining a second tandem speed corresponding to the vehicle speed and the pedal opening according to a correspondence between the vehicle speed, the pedal opening and the tandem speed; The minimum engine speed is determined based on the first series speed and the second series speed.

4. The method according to claim 3, characterized in that The determining the minimum engine speed based on the first series speed and the second series speed comprises: Acquire the engine water temperature and atmospheric pressure of the vehicle; determining a first speed correction coefficient based on the engine water temperature, and determining a second speed correction coefficient based on the atmospheric pressure; determining a minimum series speed from the first series speed and the second series speed; The minimum series speed is corrected based on the first speed correction coefficient and the second speed correction coefficient to obtain the minimum engine speed.

5. The method according to claim 1, characterized in that The determining the charging power consumption of the vehicle according to the remaining battery power of the vehicle, the driving environment parameters and the device consumption parameters includes: Determine a target power difference between the remaining power of the battery and a preset target power; Determine the target charging power corresponding to the target power difference and the current speed of the vehicle according to the corresponding relationship between the power difference, the vehicle speed and the charging power; determining a target supplementary charging power according to the driving environment parameters; Determining the high-voltage harness power consumption and the resistor power consumption of the vehicle according to the device consumption parameters; A sum of the target charging power, the target supplementary charging power, the high-voltage harness consumption power, and the resistor consumption power is determined as charging consumption power of the vehicle.

6. A vehicle, characterized in that: The vehicle includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the method for determining the engine speed of a hybrid vehicle according to any one of claims 1 to 5.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for determining the engine speed of a hybrid vehicle according to any one of claims 1 to 5 is implemented.

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