Vehicle control method and device, electronic equipment, vehicle and readable storage medium

Abstract

This application discloses a vehicle control method, device, electronic device, vehicle, and readable storage medium, belonging to the field of automotive power control technology. The embodiments of this application first determine the target power output and current speed of the vehicle generator, as well as the current speed of the vehicle motor. When it is determined that the current speed of the vehicle generator deviates from a preset generator speed range, the target transmission ratio of the continuously variable transmission (CVT) is determined based on the target power output of the vehicle generator and the current speed of the vehicle motor, thereby establishing a functional mapping relationship between power generation demand and mechanical transmission parameters. Subsequently, the current transmission ratio of the CVT is adjusted to the target transmission ratio, so that the current speed of the vehicle generator returns to the preset generator speed range corresponding to the preset power generation efficiency range, thereby ensuring that the power generation efficiency of the vehicle generator is always within the preset power generation efficiency range, which is beneficial to improving the overall vehicle energy utilization rate and extending the vehicle's driving range.

Description

Technical Field

[0001] This application belongs to the field of automotive power control technology, specifically relating to a vehicle control method, device, electronic equipment, vehicle, and readable storage medium. Background Technology

[0002] With the rapid development of new energy vehicles, optimizing the energy efficiency of the power system has become the core key to improving vehicle range and reducing energy consumption. Among them, the power generation efficiency of the generator directly affects the energy utilization rate of the whole vehicle.

[0003] Currently, under different operating conditions, the generators of new energy vehicles cannot match the high-efficiency power generation range (e.g., 91%-100%) in real time, resulting in significant energy loss in the vehicles and thus affecting their driving range. Summary of the Invention

[0004] The purpose of this application is to provide a vehicle control method, device, electronic device, vehicle, and readable storage medium that can ensure that the power generation efficiency of the vehicle generator is always within a preset power generation efficiency range, which is beneficial to improving the energy utilization rate of the whole vehicle and extending the driving range of the vehicle.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application provide a vehicle control method, the method comprising: Determine the target power output and current speed of the vehicle's generator, as well as the current speed of the vehicle's electric motor; If the current speed of the vehicle generator is outside the preset generator speed range, the target transmission ratio of the vehicle continuously variable transmission (CVT) is determined based on the target power output of the vehicle generator and the current speed of the vehicle motor; wherein the vehicle CVT is used to control the speed of the vehicle generator. The current transmission ratio of the continuously variable transmission (CVT) of the vehicle is adjusted to the target transmission ratio so that the current speed of the vehicle generator is within the preset generator speed range; wherein the preset generator speed range corresponds to the preset power generation efficiency range of the vehicle generator.

[0006] Secondly, embodiments of this application provide a vehicle control device, which includes: The determination module is used to determine the target power output and current speed of the vehicle's generator and the current speed of the vehicle's electric motor; The judgment module is used to determine the target transmission ratio of the vehicle continuously variable transmission mechanism based on the target power output of the vehicle generator and the current speed of the vehicle motor if the current speed of the vehicle generator is outside the preset generator speed range; wherein the vehicle continuously variable transmission mechanism is used to control the speed of the vehicle generator. The transmission ratio adjustment module is used to adjust the current transmission ratio of the vehicle's continuously variable transmission mechanism to the target transmission ratio, so that the current speed of the vehicle's generator is within the preset generator speed range; wherein, the preset generator speed range corresponds to the preset power generation efficiency range of the vehicle's generator.

[0007] Thirdly, embodiments of this application provide an electronic device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0008] Fourthly, embodiments of this application provide a vehicle including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the processor executes the program or instructions to implement the steps of the method described in the first aspect.

[0009] Fifthly, embodiments of this application provide a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0010] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program for implementing the steps of the method described in the first aspect.

[0011] In this embodiment, the target power output and current speed of the vehicle generator and the current speed of the vehicle motor are first determined. When it is determined that the current speed of the vehicle generator deviates from the preset generator speed range, the target transmission ratio of the continuously variable transmission (CVT) is determined based on the target power output and the current speed of the vehicle motor, thereby establishing a functional mapping relationship between power generation demand and mechanical transmission parameters. Subsequently, the current transmission ratio of the CVT is adjusted to the target transmission ratio, so that the current speed of the vehicle generator returns to the preset generator speed range corresponding to the preset power generation efficiency range, thereby ensuring that the power generation efficiency of the vehicle generator is always within the preset power generation efficiency range, which is beneficial to improving the energy utilization rate of the vehicle and extending the driving range of the vehicle. Attached Figure Description

[0012] Figure 1 This is a schematic flowchart of a vehicle control method provided in an embodiment of this application; Figure 2 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application; Figure 3 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application; Figure 4 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application; Figure 5 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application; Figure 6 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application; Figure 7 This is a schematic diagram of the vehicle control device provided in the embodiments of this application; Figure 8 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0015] The vehicle control method, device, electronic equipment, vehicle, and readable storage medium provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0016] In the power system of new energy vehicles, the generator's power generation efficiency curve is related to the rotational speed. The generator's high-efficiency power generation efficiency range (e.g., 91%-100%) corresponds to a specific generator speed range. Once the generator speed deviates from the specific generator speed range, whether it is in the inefficient low-speed range or the high-loss high-speed range, the generator's power generation efficiency will show a significant decrease.

[0017] During vehicle operation, the electric motor's speed dynamically changes with road conditions (such as starting, acceleration, constant speed, braking, etc.). However, in existing technologies, the electric motor and generator are mostly connected with a fixed transmission ratio, or the transmission ratio is adjusted to a limited number of gears through a stepped transmission mechanism. This means the generator cannot match its high-efficiency power generation range in real time according to different operating conditions, causing it to frequently deviate from this range. Especially during high-speed cruising or low-speed conditions, energy loss is significant, making it difficult for the generator to maintain its high-efficiency power generation range for extended periods, thus affecting the vehicle's overall energy utilization and driving range.

[0018] To address the aforementioned issues, this application provides a vehicle control method, device, electronic device, vehicle, and readable storage medium. First, the target power output and current speed of the vehicle's generator and the current speed of the vehicle's electric motor are determined. When it is determined that the current speed of the vehicle's generator deviates from a preset generator speed range, a target transmission ratio of the vehicle's continuously variable transmission (CVT) is determined based on the target power output and the current speed of the vehicle's electric motor, thereby establishing a functional mapping relationship between power generation demand and mechanical transmission parameters. Subsequently, the current transmission ratio of the CVT is adjusted to the target transmission ratio, causing the current speed of the vehicle's generator to return to the preset generator speed range corresponding to the preset power generation efficiency range. This ensures that the power generation efficiency of the vehicle's generator remains within the preset power generation efficiency range, which is beneficial for improving the overall vehicle energy utilization rate and extending the vehicle's driving range.

[0019] Figure 1 This is a schematic flowchart of a vehicle control method provided in an embodiment of this application. Figure 1 As shown in the figure, this application provides a vehicle control method, which includes: S101. Determine the target power output and current speed of the vehicle's generator, as well as the current speed of the vehicle's electric motor.

[0020] The vehicle control method provided in this application can be applied to a microcontroller unit (MCU) in a vehicle. Based on the MCU, it obtains the current speed of the vehicle's generator and motor through the vehicle's controller area network (CAN). Specifically, the current speeds of the generator and motor can be obtained using two separate vehicle speed sensors. Of course, other methods can also be used to obtain the current speeds of the generator and motor; this application does not impose any limitations on these methods.

[0021] For example, a speed sensor can be a rotary transformer or a Hall sensor.

[0022] The target power output of a vehicle generator refers to the output power that the generator is expected to achieve under specific operating conditions in order to maintain the balance of the vehicle's battery charge and meet the needs of electrical appliances.

[0023] In some embodiments, the target power output of the vehicle generator is calculated based on the power demand of the vehicle battery, the power demand of the vehicle's electrical appliances, and the power generation protection factor.

[0024] Optionally, the specific process for determining the target power output of the vehicle generator can be referred to the embodiments shown in S201-S203, and will not be repeated here.

[0025] S102. If the current speed of the vehicle generator is outside the preset generator speed range, the target transmission ratio of the vehicle continuously variable transmission (CVT) is determined based on the target power output of the vehicle generator and the current speed of the vehicle motor; wherein, the vehicle CVT is used to control the speed of the vehicle generator.

[0026] The preset generator speed range refers to the pre-calibrated generator speed range, meaning that when the current speed of the vehicle generator is within the preset generator speed range, the power generation efficiency of the vehicle generator is greater than or equal to the preset power generation efficiency.

[0027] In some embodiments, the process of determining the target transmission ratio of the continuously variable transmission (CVT) in S102 based on the target power output of the vehicle generator and the current speed of the vehicle motor can be as follows: determining the target speed of the vehicle generator based on the target power output of the vehicle generator; and determining the target transmission ratio of the CVT based on the ratio of the current speed of the vehicle motor to the target speed of the vehicle generator.

[0028] Optionally, the specific process of determining the target transmission ratio of the vehicle's continuously variable transmission (CVT) based on the target power output of the vehicle's generator and the current speed of the vehicle's electric motor can be referred to the embodiments shown in S301-S302, and will not be repeated here.

[0029] For example, if the preset generator speed range is 2000rpm-4000rpm, and the current speed of the vehicle generator is detected to be 4500rpm (the current speed of the vehicle generator is outside the preset generator speed range), and the target speed of the vehicle generator is determined to be 3000rpm based on the target power output of the vehicle generator, while the current speed of the vehicle motor is 6000rpm, then the calculated target transmission ratio is 2 (6000rpm / 3000rpm).

[0030] S103. Adjust the current transmission ratio of the vehicle's continuously variable transmission mechanism to the target transmission ratio so that the current speed of the vehicle's generator is within the preset generator speed range; wherein, the preset generator speed range corresponds to the preset power generation efficiency range of the vehicle's generator.

[0031] In some embodiments, the preset power generation efficiency range can be 91%-100%, i.e., the high-efficiency power generation efficiency range.

[0032] Of course, in other embodiments, the preset power generation efficiency range can be selected according to the actual situation, such as 80%-90%, 95%-100%, 92%-95%, 70%-80%, etc.

[0033] It should be understood that the continuously variable transmission (CVT) controls the speed of the vehicle's generator by adjusting the current gear ratio of the CVT.

[0034] In this embodiment, the vehicle electric motor is the power output component of the vehicle, used to drive the vehicle. It can also switch to generator mode during braking or coasting to participate in energy recovery. The output shaft of the vehicle electric motor is connected to the drive end of a continuously variable transmission (CVT), allowing it to transmit power to the CVT or receive kinetic energy from the CVT for energy recovery.

[0035] In this embodiment, the vehicle generator is used to convert mechanical energy into electrical energy, which can charge the vehicle's power battery or directly power the vehicle's electric motor. The input shaft of the vehicle generator is drive-connected to the driven end of a continuously variable transmission (CVT) mechanism, and can receive power transmitted by the CVT mechanism.

[0036] For example, a vehicle's continuously variable transmission (CVT) can be either a metal belt CVT or an electronically controlled continuously variable transmission (E-CVT).

[0037] In some embodiments, the process of adjusting the current transmission ratio of the vehicle continuously variable transmission mechanism to the target transmission ratio in S103 can be as follows: the MCU sends a command to the hydraulic control system or motor drive system of the vehicle continuously variable transmission mechanism to adjust the transmission ratio between the driving wheel and the driven wheel until the current transmission ratio of the vehicle continuously variable transmission mechanism converges to the target transmission ratio.

[0038] In this embodiment, the target power output and current speed of the vehicle generator and the current speed of the vehicle motor are first determined. When it is determined that the current speed of the vehicle generator deviates from the preset generator speed range, the target transmission ratio of the continuously variable transmission (CVT) is determined based on the target power output and the current speed of the vehicle motor, thereby establishing a functional mapping relationship between power generation demand and mechanical transmission parameters. Subsequently, the current transmission ratio of the CVT is adjusted to the target transmission ratio, so that the current speed of the vehicle generator returns to the preset generator speed range corresponding to the preset power generation efficiency range, thereby ensuring that the power generation efficiency of the vehicle generator is always within the preset power generation efficiency range, which is beneficial to improving the energy utilization rate of the vehicle and extending the driving range of the vehicle.

[0039] As a possible embodiment of this application, the specific process of determining the target power generation of the vehicle generator in S101 above can be implemented by the following S201-S203.

[0040] Figure 2 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application. Combined with... Figure 1 ,like Figure 2 As shown, determining the target power output of the vehicle's generator in S101 includes: S201. Determine the power requirements of the vehicle battery and the power requirements of the vehicle's electrical appliances.

[0041] In this embodiment, the vehicle battery is electrically connected to both the vehicle generator and the vehicle motor. The vehicle battery is used to store the electrical energy generated by the generator and to provide driving power for the motor.

[0042] Among them, the required power of a vehicle battery refers to the charging or discharging power required by the vehicle battery at its current charge level to reach the target charge level or maintain the current operating conditions.

[0043] In some embodiments, the power demand of the vehicle battery is typically calculated based on the battery temperature, SOC value, and maximum allowable charge / discharge current monitored in real time by the Battery Management System (BMS). The MCU collects the power demand of the vehicle battery in real time via CAN. Of course, the power demand of the vehicle battery can also be obtained in other ways, and this application embodiment does not limit this.

[0044] It should be understood that the State of Charge (SOC) represents the percentage of the remaining capacity of the power battery relative to its nominal capacity, and the value range is usually 0% to 100%.

[0045] For example, when the vehicle is in the regenerative braking phase and the vehicle battery's current charge is low, the battery management system will calculate a higher power demand for the vehicle battery, such as 20kW, to quickly replenish the vehicle battery's charge; conversely, if the vehicle battery is already fully charged, the power demand for the vehicle battery may be zero.

[0046] Among them, the power demand of vehicle electrical appliances refers to the total electrical power consumed by all non-driving electrical appliances in the vehicle at the same time. Non-driving electrical components include, but are not limited to, air conditioning compressors, PTC electric heaters, in-vehicle entertainment systems, lighting systems, etc.

[0047] In some embodiments, the MCU collects the on / off status and rated power of each electrical appliance in real time via CAN, and adds the rated power of each appliance to obtain the required power of the vehicle's electrical appliances. Of course, the required power of the vehicle's electrical appliances can also be obtained through other methods, and this application embodiment does not limit this.

[0048] For example, in a high-temperature summer environment, if the air conditioning compressor is running at full load (about 3kW) and the headlights are on (about 0.1kW), the power demand of the vehicle's electrical appliances is about 3.1kW.

[0049] S202. Sum the power demand of the vehicle battery and the power demand of the vehicle's electrical appliances to obtain the total power demand of the vehicle.

[0050] Specifically, the vehicle's power demand is the sum of the power demand of the vehicle's battery and the power demand of the vehicle's electrical appliances, used to represent the total power generation theoretically required at the current moment.

[0051] For example, if the vehicle battery requires 15kW of power and the vehicle's electrical appliances require 4kW of power, then the calculated total vehicle power requirement is 19kW.

[0052] In some specific implementation methods... The formula for calculating the total power requirement of the vehicle is defined as follows:

[0053] in, The power required by the vehicle battery. This refers to the power requirements of the vehicle's electrical appliances.

[0054] S203. Multiply the vehicle's required power by the power generation protection coefficient to obtain the target power generation; wherein the power generation protection coefficient is greater than 0 and less than 1, so as to limit the target power generation of the vehicle's generator.

[0055] For example, the power generation protection factor can be 0.75, 0.8, 0.85, 0.9, 0.95, etc.

[0056] It should be understood that the power generation protection factor can be selected according to the actual situation.

[0057] In some embodiments, the target power generation is the product of the vehicle's required power and the power generation protection factor, used to represent the power that the vehicle's generator should ultimately output.

[0058] In some specific implementation methods... The formula for calculating the target power generation is defined as follows:

[0059] in, For the power required by the whole vehicle, This is the power generation protection factor.

[0060] For example, if the vehicle's power requirement is 20kW and the power generation protection factor is 0.9, then the target power generation is 20kW × 0.9 = 18kW.

[0061] In this embodiment, by determining the required power of the vehicle battery and the required power of the vehicle electrical appliances separately, and summing them to obtain the required power of the whole vehicle, the dual needs of energy storage unit replenishment and load unit consumption can be met simultaneously, so as to ensure the balance between energy production and consumption. On this basis, a power generation protection coefficient greater than 0 and less than 1 is introduced to correct the required power of the whole vehicle, so as to avoid overload of the vehicle battery and vehicle electrical appliances and ensure the safety of the whole vehicle power system.

[0062] As a possible embodiment of this application, the specific process of determining the target transmission ratio of the vehicle continuously variable transmission mechanism based on the target power output of the vehicle generator and the current speed of the vehicle motor in S102 can be implemented through the following S301-S302.

[0063] Figure 3 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application. Combined with... Figure 1 ,like Figure 3 As shown, in S102, the target transmission ratio of the vehicle's continuously variable transmission (CVT) is determined based on the target power output of the vehicle's generator and the current speed of the vehicle's electric motor, including: S301. Determine the target speed of the vehicle generator based on the target power output of the vehicle generator.

[0064] The target speed of the vehicle generator refers to the optimal speed at which the vehicle generator achieves the highest power generation efficiency under the current target power generation.

[0065] In some embodiments, the process of determining the target speed of the vehicle generator based on the target power output of the vehicle generator can be as follows: based on the target power output of the vehicle generator, query the target power output-target speed mapping table to obtain the target speed of the vehicle generator.

[0066] For example, if the calculated target power generation is 20kW, and the system finds from the table that the generator's highest efficiency point at 20kW corresponds to a speed of 2500rpm, then this 2500rpm is determined as the target speed of the vehicle's generator.

[0067] S302. Determine the target transmission ratio of the vehicle's continuously variable transmission (CVT) based on the ratio of the current speed of the vehicle's electric motor to the target speed of the vehicle's generator.

[0068] Specifically, the target gear ratio of the vehicle's continuously variable transmission (CVT) is obtained by dividing the current speed of the vehicle's electric motor by the target speed of the vehicle's generator. The MCU collects the current speed of the vehicle's electric motor in real time, divides the collected current speed of the vehicle's electric motor by the target speed of the vehicle's generator, and thus calculates the target gear ratio of the vehicle's CVT.

[0069] It should be understood that, since the driving end of the continuously variable transmission (CVT) is connected to the vehicle's electric motor and the driven end is connected to the vehicle's generator, the target transmission ratio of the CVT is equal to the current speed of the vehicle's electric motor divided by the target speed of the vehicle's generator.

[0070] In other embodiments, the target gear ratio of the vehicle continuously variable transmission (CVT) can also be the target speed of the vehicle generator divided by the current speed of the vehicle motor.

[0071] For example, when the vehicle is cruising at high speed, the current speed of the vehicle's electric motor is 5000 rpm, and the target speed of the vehicle's generator, determined based on the target power output, is 2500 rpm. The calculated target gear ratio of the vehicle's continuously variable transmission (CVT) is 2 (i.e., 5000 rpm / 2500 rpm). When the vehicle is traveling at low speed, the current speed of the vehicle's electric motor is 2000 rpm, and the target speed of the vehicle's generator, determined based on the target power output, is 2000 rpm. The calculated target gear ratio of the vehicle's CVT is 1 (i.e., 2000 rpm / 2000 rpm).

[0072] In this embodiment, the target speed of the vehicle generator corresponding to the target power output of the vehicle generator is first determined by looking up a table, thereby ensuring that the power output efficiency of the vehicle generator is always within the preset power output efficiency range, so as to avoid power output efficiency loss due to improper speed matching of the vehicle generator; then, the target transmission ratio of the vehicle continuously variable transmission mechanism is calculated by combining the current speed of the vehicle motor, thereby ensuring that the calculation of the target transmission ratio of the vehicle continuously variable transmission mechanism can change with the speed of the vehicle motor, so as to accurately match different vehicle operating conditions.

[0073] Figure 4 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application. Figure 4 As shown, the vehicle generator is an electrically excited synchronous motor, and the method also includes: S401. Determine the current output current and current output voltage of the vehicle generator.

[0074] An electrically excited synchronous motor (EESM) is a type of synchronous motor that generates a magnetic field through a rotor excitation winding. The stator of an EESM has a three-phase armature winding for outputting or inputting AC power; the rotor does not have permanent magnets but instead has an excitation winding. By applying direct current (usually through slip rings and brush assemblies or wireless excitation technology) to this excitation winding, an adjustable magnetic field is established on the rotor core.

[0075] It should be understood that the internal magnetic field strength of an electrically excited synchronous motor can be dynamically adjusted by regulating the current in the excitation winding.

[0076] In some embodiments, the current output current and current output voltage of the vehicle generator are acquired by a current sensor and a voltage sensor installed in the generator output circuit, respectively, and transmitted to the MCU. Of course, the current output current and current output voltage of the vehicle generator can also be obtained in other ways, and this application embodiment does not limit this.

[0077] For example, a Hall effect sensor can be used for current sensing to monitor the current of the output bus in real time, while a voltage sensor can be directly connected in parallel between the positive and negative terminals of the output to obtain the voltage.

[0078] S402. Multiply the current output voltage of the vehicle generator by the current output current of the vehicle generator to obtain the current power output of the vehicle generator.

[0079] The current power output of the vehicle generator is obtained by multiplying the current output voltage of the vehicle generator by the current output current of the vehicle generator.

[0080] For example, if the current output voltage of the vehicle generator is detected to be 400V and the current output current of the vehicle generator is 50A, then the current power generation of the vehicle generator is calculated to be 20kW.

[0081] In some specific implementation methods... The formula for calculating the current power output of the vehicle's generator is defined as follows:

[0082] in, This is the current output voltage of the vehicle's generator. This represents the current output current of the vehicle's generator.

[0083] S403. If the current power output of the vehicle generator is less than the target power output of the vehicle generator, then increase the electromagnetic strength of the vehicle generator.

[0084] Specifically, when the current power output of the vehicle's generator is detected to be lower than its target power output, it indicates that the generator is not outputting enough electrical energy at the current speed. The MCU then issues a command to increase the excitation current of the generator to enhance the magnetic field strength generated by the rotor windings.

[0085] S404. If the current power output of the vehicle generator is greater than the target power output of the vehicle generator, then reduce the electromagnetic strength of the vehicle generator.

[0086] Specifically, when the current power output of the vehicle generator is detected to be higher than the target power output, it indicates that the vehicle generator is in an overload state or exceeds the power point corresponding to the preset power output efficiency range. Long-term operation may lead to overheating or increased energy consumption. The MCU issues a command to reduce the excitation current of the vehicle generator to reduce the magnetic field strength generated by the rotor winding.

[0087] S405. If the current generating power of the vehicle generator is equal to the target generating power of the vehicle generator, then the electromagnetic strength of the vehicle generator shall remain unchanged.

[0088] Specifically, when the difference between the current generating power of the vehicle generator and its target generating power is equal to or approximately equal to 0, it indicates that the vehicle generator is in an ideal operating state and there is no need to adjust the electromagnetic strength of the vehicle generator. The MCU maintains the current excitation current of the vehicle generator constant to keep the electromagnetic strength generated by the rotor winding constant.

[0089] In this embodiment, by adjusting the current transmission ratio of the vehicle's continuously variable transmission (CVT) to the target transmission ratio, the power generation efficiency of the vehicle's generator can be kept within a preset power generation efficiency range. Furthermore, by adjusting the electromagnetic strength of the generator, the current power generation of the vehicle's generator can be corrected, so that the current power generation of the vehicle's generator can reach the target power generation of the vehicle's generator. This ensures that when the power generation efficiency of the vehicle's generator is within the preset power generation efficiency range, the vehicle's power demand can still be met.

[0090] Figure 5 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application. Figure 5 As shown, the method also includes: S501. Determine the current temperature of the vehicle's generator.

[0091] In some embodiments, the current temperature of the vehicle generator is acquired by a temperature sensor installed on the vehicle generator and transmitted to the MCU. Of course, the current temperature of the vehicle generator can also be obtained in other ways, and this application embodiment does not limit this.

[0092] S502. If the current temperature of the vehicle's generator is less than or equal to a preset temperature value, then the first valve of the vehicle's thermal management system shall be closed; wherein, the first valve of the vehicle's thermal management system is used to control the on / off state of the generator cooling circuit of the vehicle's thermal management system.

[0093] It should be understood that the first valve of the vehicle thermal management system is installed in the generator cooling circuit to physically cut off or open the flow path of coolant in the generator cooling circuit. The first valve includes a valve body, a valve core, and a drive motor, which drives the valve core to switch from the open position to the closed position.

[0094] Specifically, when the current temperature of the vehicle generator is detected to be less than or equal to the preset temperature value, it indicates that the vehicle generator's own heat dissipation capacity is sufficient to maintain the normal operating temperature, or that the heat generated by the vehicle generator has not reached the level that affects the power generation efficiency. The MCU sends a closing command to the first valve, and the drive motor drives the valve core to switch from the open position to the closed position, thereby cutting off the coolant circulation of the generator cooling circuit of the vehicle thermal management system.

[0095] S503. If the current temperature of the vehicle's generator is greater than the preset temperature value, then the first valve of the vehicle's thermal management system will be opened.

[0096] Specifically, when the current temperature of the vehicle generator is detected to be greater than the preset temperature value, it indicates that the vehicle generator's own heat dissipation capacity is sufficient to maintain the normal operating temperature, or that the heat generated by the vehicle generator has not reached the level that affects the power generation efficiency. The MCU sends an opening command to the first valve, and the drive motor drives the valve core to switch from the closed position to the open position, thereby conducting the coolant circulation of the generator cooling circuit of the vehicle thermal management system.

[0097] In this embodiment, when the current temperature of the vehicle generator does not exceed the preset temperature value, the first valve is closed to disconnect the generator cooling circuit, which helps to reduce the energy consumption of the thermal management system. When the current temperature of the vehicle generator is high, the first valve is opened to connect the generator cooling circuit, and the coolant in the generator cooling circuit quickly removes the heat generated by the vehicle generator, so as to ensure that the vehicle generator always operates within a suitable temperature range, thereby reducing the impact of the vehicle generator temperature on the power generation efficiency of the vehicle generator and ensuring the safety of the vehicle under complex operating conditions.

[0098] Figure 6 This is a schematic flowchart of another vehicle control method provided in an embodiment of this application. Figure 6 As shown, the method also includes: S601. Determine the current torque, current output current, and current output voltage of the vehicle generator.

[0099] In some embodiments, the current torque of the vehicle generator is acquired in real time by a torque sensor and transmitted to the MCU. Of course, the current torque of the vehicle generator can also be obtained in other ways, and this application embodiment does not limit this.

[0100] Optionally, the specific process for determining the current output current and current output voltage of the vehicle generator can be referred to the embodiment shown in S401, and will not be repeated here.

[0101] S602. Multiply the current speed of the vehicle generator by the current torque of the vehicle generator to obtain the current mechanical input power of the vehicle generator, and multiply the current output voltage of the vehicle generator by the current output current of the vehicle generator to obtain the current power output power of the vehicle generator.

[0102] The current mechanical input power of the vehicle generator is obtained by multiplying the current speed of the vehicle generator by the current torque of the vehicle generator.

[0103] For example, if the current speed of the vehicle's generator is 3000 rpm and the current torque of the vehicle's generator is 80 N·m, then the current mechanical input power of the vehicle's generator is approximately 25.13 kW.

[0104] In some specific implementation methods... The formula for calculating the current mechanical input power of the vehicle's generator is defined as follows:

[0105] in, This represents the current torque of the vehicle's generator. This represents the current speed of the vehicle's generator. This is a unit conversion constant.

[0106] Optionally, the specific process of multiplying the current output voltage of the vehicle generator with the current output current of the vehicle generator to obtain the current power output of the vehicle generator is as shown in the embodiment of S402, and will not be repeated here.

[0107] S603. Determine the current power generation efficiency of the vehicle generator based on the ratio of the current power output of the vehicle generator to the current mechanical input power of the vehicle generator.

[0108] The current power generation efficiency of a vehicle generator refers to the energy conversion rate of the vehicle generator from mechanical energy to electrical energy, and is a core indicator for measuring the performance of a vehicle generator. The current power generation efficiency of a vehicle generator is obtained by dividing the current output power of the vehicle generator by the current mechanical input power of the vehicle generator.

[0109] For example, if the current power output of the vehicle generator is 20kW and the current mechanical input power of the vehicle generator is 25.13kW, then the current power generation efficiency of the vehicle generator is 20kW / 25.13kW×100%≈79.6%.

[0110] In some specific implementation methods... The formula for calculating the current power generation efficiency of a vehicle's generator is defined as follows:

[0111] in, This represents the current mechanical input power of the vehicle's generator. This represents the current power output of the vehicle's generator. This is a unit conversion constant.

[0112] S604. If the current power generation efficiency of the vehicle generator is outside the preset power generation efficiency range, return to the step of determining the target power generation power and current speed of the vehicle generator and the current speed of the vehicle motor.

[0113] Specifically, it is determined whether the calculated current power generation efficiency of the vehicle generator is within the preset power generation efficiency range. If the current power generation efficiency of the vehicle generator deviates from the preset power generation efficiency range, it is determined that the vehicle generator is not within the preset power generation efficiency range, and it is necessary to repeat S101, determine the target power generation power and current speed of the vehicle generator, the current speed of the vehicle motor, and the steps after S101.

[0114] In this embodiment, after the transmission ratio is adjusted by the vehicle's continuously variable transmission (CVT), the calculated current power generation efficiency of the vehicle's generator is compared with the preset power generation efficiency range of the vehicle's generator. This allows for a determination of whether the current power generation efficiency, after adjustment, falls within the preset range, and based on the comparison result, it is determined whether further adjustment is necessary. By verifying the current power generation efficiency of the vehicle's generator, it can be ensured that the generator operates stably within the preset power generation efficiency range under various complex operating conditions, thereby maximizing energy savings and extending the vehicle's driving range.

[0115] It should be noted that the vehicle control method provided in this application embodiment can be executed by a vehicle control device 7, or a control module in the vehicle control device 7 for executing the loading vehicle control method. This application embodiment uses the vehicle control device 7 executing the loading vehicle control method as an example to illustrate the vehicle control method provided in this application embodiment.

[0116] Figure 7 This is a schematic diagram of the structure of the vehicle control device 7 provided in an embodiment of this application. Figure 7 As shown in the figure, this application embodiment provides a vehicle control device 7, which includes: a determining module 701, used to determine the target power output and current speed of the vehicle generator and the current speed of the vehicle motor; a judging module 702, used to determine the target transmission ratio of the vehicle continuously variable transmission (CVT) mechanism based on the target power output of the vehicle generator and the current speed of the vehicle motor if the current speed of the vehicle generator is outside a preset generator speed range; wherein the CVT mechanism is used to control the speed of the vehicle generator; and a transmission ratio adjusting module 703, used to adjust the current transmission ratio of the CVT mechanism to the target transmission ratio so that the current speed of the vehicle generator is within the preset generator speed range; wherein the preset generator speed range corresponds to the preset power output efficiency range of the vehicle generator.

[0117] In one possible implementation, the determining module 701 is specifically used to: determine the required power of the vehicle battery and the required power of the vehicle electrical appliances; sum the required power of the vehicle battery and the required power of the vehicle electrical appliances to obtain the required power of the whole vehicle; multiply the required power of the whole vehicle by the power generation protection coefficient to obtain the target power generation; wherein the power generation protection coefficient is greater than 0 and less than 1, so as to limit the target power generation of the vehicle generator.

[0118] In one possible implementation, the judgment module 702 is specifically used to: determine the target speed of the vehicle generator based on the target power output of the vehicle generator; and determine the target transmission ratio of the vehicle continuously variable transmission mechanism based on the ratio of the current speed of the vehicle motor to the target speed of the vehicle generator.

[0119] In one possible implementation, the vehicle control device 7 further includes an electromagnetic adjustment module 704, which is used to: determine the current output current and the current output voltage of the vehicle generator; multiply the current output voltage and the current output current of the vehicle generator to obtain the current power output of the vehicle generator; if the current power output of the vehicle generator is less than the target power output of the vehicle generator, increase the electromagnetic strength of the vehicle generator; if the current power output of the vehicle generator is greater than the target power output of the vehicle generator, decrease the electromagnetic strength of the vehicle generator; and if the current power output of the vehicle generator is equal to the target power output of the vehicle generator, keep the electromagnetic strength of the vehicle generator unchanged.

[0120] In one possible implementation, the vehicle control device 7 further includes a temperature regulation module 705, which is used to: determine the current temperature of the vehicle generator; if the current temperature of the vehicle generator is less than or equal to a preset temperature value, close the first valve of the vehicle thermal management system; wherein the first valve of the vehicle thermal management system is used to control the on / off state of the generator cooling circuit of the vehicle thermal management system; if the current temperature of the vehicle generator is greater than the preset temperature value, open the first valve of the vehicle thermal management system.

[0121] In one possible implementation, the vehicle control device 7 further includes an efficiency verification module 706, which is used to: determine the current torque, current output current, and current output voltage of the vehicle generator; multiply the current speed and current torque of the vehicle generator to obtain the current mechanical input power of the vehicle generator; and multiply the current output voltage and current output current of the vehicle generator to obtain the current power output power of the vehicle generator; determine the current power generation efficiency of the vehicle generator based on the ratio of the current power output power to the current mechanical input power of the vehicle generator; and if the current power generation efficiency of the vehicle generator is outside a preset power generation efficiency range, return to the steps of determining the target power generation power, current speed, and current speed of the vehicle generator and the vehicle motor.

[0122] The vehicle control device 7 in this application embodiment can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. For example, mobile electronic devices can be mobile phones, tablets, laptops, PDAs, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), etc., while non-mobile electronic devices can be servers, network attached storage (NAS), personal computers (PCs), televisions (TVs), ATMs, or self-service machines, etc. This application embodiment does not impose specific limitations.

[0123] The vehicle control device 7 in this embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this embodiment does not impose specific limitations.

[0124] The vehicle control device 7 provided in this application embodiment can achieve... Figures 1 to 6 The various processes implemented by the vehicle control device 7 in the method embodiment will not be described again here to avoid repetition.

[0125] In this embodiment, the vehicle control device 7 first determines the target power output and current speed of the vehicle generator, as well as the current speed of the vehicle motor. When it is determined that the current speed of the vehicle generator deviates from the preset generator speed range, the target transmission ratio of the continuously variable transmission (CVT) is determined based on the target power output and the current speed of the vehicle motor, thereby establishing a functional mapping relationship between power generation demand and mechanical transmission parameters. Subsequently, the current transmission ratio of the CVT is adjusted to the target transmission ratio, so that the current speed of the vehicle generator returns to the preset generator speed range corresponding to the preset power generation efficiency range, thereby ensuring that the power generation efficiency of the vehicle generator is always within the preset power generation efficiency range, which is beneficial to improving the overall vehicle energy utilization rate and extending the vehicle's driving range.

[0126] Figure 8 This is a schematic diagram of the structure of the electronic device 8 provided in an embodiment of this application. Figure 8 As shown, this application embodiment also provides an electronic device 8, including: a processor 801, a memory 802, and a program or instructions stored in the memory 802 and executable on the processor 801. When the program or instructions are executed by the processor 801, they implement the various processes of the above-described vehicle control method embodiment and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0127] Optionally, the electronic device 8 also includes a communication component 803. The processor 801, memory 802, and communication component 803 are connected via a bus 804.

[0128] It should be noted that the electronic device 8 in this application embodiment includes the mobile electronic device and the non-mobile electronic device described above.

[0129] This application also provides a vehicle, including: a processor 801, a memory 802, and a program or instructions stored in the memory 802 and executable on the processor 801. When the program or instructions are executed by the processor 801, they implement the various processes of the above-described vehicle control method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0130] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by the processor 801, they implement the various processes of the above-described vehicle control method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0131] The processor 801 is the processor 801 in the electronic device 8 described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0132] This application also provides a computer program product, including a computer program for implementing the steps of the vehicle control method described above.

[0133] Since the computer program product in the embodiments of this application can be applied to the above-described vehicle control method, the technical effects it can achieve can also be referred to the above-described method embodiments. The embodiments of this application will not be repeated here.

[0134] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0135] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0136] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A vehicle control method, characterized in that, The method includes: Determine the target power output and current speed of the vehicle's generator, as well as the current speed of the vehicle's electric motor; If the current speed of the vehicle generator is outside the preset generator speed range, the target transmission ratio of the vehicle continuously variable transmission (CVT) is determined based on the target power output of the vehicle generator and the current speed of the vehicle motor; wherein the vehicle CVT is used to control the speed of the vehicle generator. The current transmission ratio of the continuously variable transmission (CVT) of the vehicle is adjusted to the target transmission ratio so that the current speed of the vehicle generator is within the preset generator speed range; wherein the preset generator speed range corresponds to the preset power generation efficiency range of the vehicle generator.

2. The method according to claim 1, characterized in that, Determining the target power output of the vehicle's generator includes: Determine the power requirements of the vehicle battery and the power requirements of the vehicle's electrical appliances; The total vehicle power requirement is obtained by summing the power requirement of the vehicle battery and the power requirement of the vehicle's electrical appliances. The target power generation is obtained by multiplying the required power of the vehicle by the power generation protection coefficient; wherein the power generation protection coefficient is greater than 0 and less than 1, so as to limit the target power generation of the vehicle generator.

3. The method according to claim 1, characterized in that, Determining the target transmission ratio of the vehicle's continuously variable transmission (CVT) based on the target power output of the vehicle's generator and the current speed of the vehicle's electric motor includes: The target rotational speed of the vehicle generator is determined based on the target power output of the vehicle generator. The target transmission ratio of the vehicle's continuously variable transmission (CVT) is determined based on the ratio of the current speed of the vehicle's electric motor to the target speed of the vehicle's generator.

4. The method according to claim 1, characterized in that, The vehicle generator is an electrically excited synchronous motor, and the method further includes: Determine the current output current and the current output voltage of the vehicle generator; The current output voltage of the vehicle generator is multiplied by the current output current of the vehicle generator to obtain the current power output of the vehicle generator; If the current power output of the vehicle generator is less than the target power output of the vehicle generator, then the electromagnetic strength of the vehicle generator is increased. If the current power output of the vehicle generator is greater than the target power output of the vehicle generator, then the electromagnetic strength of the vehicle generator is reduced. If the current power output of the vehicle generator is equal to the target power output of the vehicle generator, then the electromagnetic strength of the vehicle generator remains unchanged.

5. The method according to claim 1, characterized in that, The method further includes: Determine the current temperature of the vehicle's generator; If the current temperature of the vehicle's generator is less than or equal to a preset temperature value, then the first valve of the vehicle's thermal management system is closed; wherein, the first valve of the vehicle's thermal management system is used to control the on / off state of the generator cooling circuit of the vehicle's thermal management system. If the current temperature of the vehicle's generator is greater than the preset temperature value, then the first valve of the vehicle's thermal management system is opened.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: Determine the current torque, current output current, and current output voltage of the vehicle generator; The current mechanical input power of the vehicle generator is obtained by multiplying the current speed of the vehicle generator by the current torque of the vehicle generator, and the current output power of the vehicle generator is obtained by multiplying the current output voltage of the vehicle generator by the current output current of the vehicle generator. The current power generation efficiency of the vehicle generator is determined based on the ratio of the current power output of the vehicle generator to the current mechanical input power of the vehicle generator. If the current power generation efficiency of the vehicle generator is outside the preset power generation efficiency range, then return to the step of determining the target power generation power and current speed of the vehicle generator and the current speed of the vehicle motor.

7. A vehicle control device, characterized in that, The vehicle control device includes; The determination module is used to determine the target power output and current speed of the vehicle's generator and the current speed of the vehicle's electric motor; The judgment module is used to determine the target transmission ratio of the vehicle continuously variable transmission mechanism based on the target power output of the vehicle generator and the current speed of the vehicle motor if the current speed of the vehicle generator is outside the preset generator speed range; wherein the vehicle continuously variable transmission mechanism is used to control the speed of the vehicle generator. The transmission ratio adjustment module is used to adjust the current transmission ratio of the vehicle's continuously variable transmission mechanism to the target transmission ratio, so that the current speed of the vehicle's generator is within the preset generator speed range; wherein, the preset generator speed range corresponds to the preset power generation efficiency range of the vehicle's generator.

8. An electronic device, characterized in that, include: A processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the vehicle control method as described in any one of claims 1 to 6.

9. A vehicle, characterized in that, include: A processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the processor, when executing the program or instructions, implements the steps of the vehicle control method as described in any one of claims 1 to 6.

10. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the vehicle control method as described in any one of claims 1 to 6.

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