CN118041138A - Generator control method, generator control device, vehicle and storage medium - Google Patents

Abstract

The present application provides a generator control method, device, vehicle and storage medium, which is applied to the field of vehicles. The method includes: by obtaining the available torque of the vehicle generator, when the available torque is less than the required torque corresponding to the set voltage value, controlling the generator to switch from the voltage generation mode to the torque generation mode, obtaining the actual output voltage value of the generator in the torque generation mode, and when the actual output voltage value is greater than the set voltage value, controlling the generator to switch from the torque generation mode to the voltage generation mode, and outputting the voltage according to the set voltage value. The method can flexibly control the power generation mode of the generator, control the power generation process of the generator, and strategically control the mutual conversion of the two power generation modes, so as to better meet the power demand of the vehicle and reduce the power shortage of the vehicle.

Description

Generator control method, device, vehicle and storage medium

Technical Field

The present application relates to the field of vehicles, and in particular to a generator control method, device, vehicle and storage medium.

Background technique

As energy shortage and environmental pollution become increasingly serious, energy conservation and emission reduction have become the key points to be tackled in the automotive industry. Hybrid vehicles have attracted widespread attention due to their better fuel economy and emission performance. For single-motor hybrid systems, the common hybrid route layouts on the market are P0, P1, P2, P3, and P4. Among them, P1 uses an integrated starter generator (ISG), which is directly connected to the engine crankshaft. It has a simple structure and is easier to be modified and implemented on existing internal combustion engine vehicles. Taking the ISG motor as an example, the ISG has the functions of starting and generating electricity. When the engine starts, the ISG converts the battery's electrical energy into kinetic energy, increases the engine speed to the ignition injection speed point, and provides power for the engine to start; when the engine is running, the ISG is driven by the engine to convert kinetic energy into electrical energy to supply power to the vehicle load and battery.

However, in actual use, when the engine torque is insufficient and the engine speed is low when the vehicle is idling, the ISG motor's generating torque and power will often be too small, causing the ISG to be unable to output the requested voltage value normally, affecting the vehicle's charging speed and even causing power loss in severe cases.

Based on this, how to better meet the vehicle's electricity needs has become an urgent problem to be solved.

Summary of the invention

This application provides a generator control method, device, vehicle and storage medium, aiming to better meet the vehicle's power demand and reduce the vehicle's power shortage. The technical solution is as follows:

In a first aspect, an embodiment of the present specification provides a generator control method, comprising:

Obtaining available torque of a vehicle generator;

When the available torque is less than the required torque corresponding to the set voltage value, controlling the generator of the vehicle to switch from a voltage generation mode to a torque generation mode;

Acquiring an actual output voltage value of the generator in a torque generation mode;

When the actual output voltage value is greater than the set voltage value, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode, the generator is controlled to output a voltage according to the set voltage value.

In a second aspect, an embodiment of the present specification provides a generator control device, comprising:

A torque acquisition module, for acquiring available torque of a vehicle generator;

A first switching module, configured to control the vehicle generator to switch from a voltage generation mode to a torque generation mode when the available torque is less than a required torque corresponding to a set voltage value;

A voltage acquisition module, used to acquire an actual output voltage value of the generator in a torque generation mode;

The second switching module is used to control the generator to switch from the torque power generation mode to the voltage power generation mode when the actual output voltage value is greater than the set voltage value, and to control the generator to output voltage according to the set voltage value in the voltage power generation mode.

In a third aspect, an embodiment of the present specification provides a vehicle, the vehicle comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the above method when executed by the processor.

In a fourth aspect, an embodiment of the present specification provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed, the steps of the above method are implemented.

In the embodiment of the present specification, by obtaining the available torque of the vehicle generator, when the available torque is less than the required torque corresponding to the set voltage value, the generator is controlled to switch from the voltage generation mode to the torque generation mode, and the actual output voltage value of the generator in the torque generation mode is obtained. When the actual output voltage value is greater than the set voltage value, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and output the voltage according to the set voltage value. By monitoring the available torque of the vehicle generator, when the available torque is less than the required torque corresponding to the set voltage value, it means that the available torque is insufficient and cannot meet the target voltage requirement. Therefore, the generator needs to use torque power generation to output full power, reduce the battery discharge as much as possible, and meet the power consumption of the vehicle's large load at the same time, and reduce the power feeding situation. In the torque generation mode, if the actual output voltage value is greater than the set voltage value, the generator is controlled to switch from the torque generation mode to the voltage generation mode to prevent the actual output voltage value from being too high, causing overcurrent, and forming a large current to impact the battery and vehicle load. This method can flexibly control the power generation mode (voltage generation/torque generation) of the generator, control the power generation process of the generator, and strategically control the mutual conversion between these two power generation modes, so as to better meet the vehicle's power demand and reduce the vehicle's power shortage.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a scenario of a generator control method provided in an embodiment of this specification;

FIG2 is a flow chart of a generator control method provided in an embodiment of this specification;

FIG3 is a flow chart of a generator control method provided in an embodiment of this specification;

FIG4 is a schematic diagram of an example of a generator control method provided in an embodiment of this specification;

FIG5 is an overall flow chart of a generator control method provided in an embodiment of this specification;

FIG6 is a schematic diagram of the structure of a generator control device provided in an embodiment of this specification;

FIG. 7 is a schematic diagram of the structure of a vehicle provided in an embodiment of this specification.

Detailed ways

The following will be combined with the accompanying drawings to clearly and thoroughly describe the technical solutions in this application. In the description of the embodiments of this specification, unless otherwise specified, "/" means or, for example, A/B can mean A or B: "and/or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this specification, "multiple" means two or more than two.

In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

FIG1 is a schematic diagram of a scenario of a generator control method provided in an embodiment of this specification.

For example, as shown in FIG1 , during the driving process of the vehicle 101 , the ECU 1011 obtains the required power according to the vehicle load and the battery power, and sends a request to set the voltage value to the generator 1012 according to the power, and the generator generates electricity according to the set voltage value requested by the ECU 1011. However, in actual use, when the engine torque is insufficient and the engine speed is low in the vehicle idle state, the generator 1012 often has a situation where the torque and power generation of the generator 1012 are too small, resulting in the generator 1012 being unable to output normally according to the set voltage value, affecting the charging speed of the vehicle, and even causing a loss of power in severe cases. Usually, the speed of the generator 1012 can be increased by increasing the idle speed of the engine, thereby increasing the power generation of the generator 1012 to meet the power consumption of the vehicle. However, as the speed increases, the noise, vibration and harshness (NVH) of the engine will also deteriorate, generating abnormal noise and affecting the driving experience.

Based on the above situation, the embodiment of this specification proposes a generator control method, which can obtain the available torque of the vehicle generator, confirm whether to enter the torque power generation mode based on the available torque, and then confirm whether to switch to the voltage power generation mode according to the actual output voltage value in the torque power generation mode. It realizes the control of the generator's power generation process according to the actual situation of the vehicle under different working conditions, determines the current generator's power generation mode (voltage generation\torque generation), and strategically controls the mutual conversion of the two power generation modes, so as to better meet the vehicle's power demand and reduce the vehicle's power feeding situation.

The generator control method provided in this specification is described in detail below in conjunction with specific embodiments.

Fig. 2 is a flow chart of a generator control method provided in an embodiment of the present specification. It should be understood that the method can be applied to the vehicle 101 in Fig. 1 , and specifically can be applied to any electronic control unit (ECU) in the vehicle 101 .

As shown in FIG. 2 , the method of the embodiment of this specification may include the following steps S101 to S104 .

S101, obtaining available torque of a vehicle generator;

In one embodiment, the vehicle is a hybrid vehicle, and the vehicle generator can be selected according to the actual needs of the vehicle, but the generator needs to have two power generation modes: voltage generation and torque generation. The voltage generation mode refers to the generator responding to the ECU request and outputting voltage according to the set voltage value to provide electrical energy for the vehicle load and the battery. The torque generation mode refers to the generator generating electricity according to the available torque (the current maximum available torque), that is, full power output at the current speed. For example, in the P1 hybrid system, the vehicle generator is an ISG motor, which has the functions of engine start and stop and brake energy recovery power generation. During the operation of the ISG motor, its torque is affected by many factors, including the motor's current, voltage, magnetic flux, and speed. Exemplarily, the maximum power allowed by the generator can be divided by the current motor speed to obtain the available torque of the generator.

S102, when the available torque is less than the required torque corresponding to the set voltage value, controlling the generator to switch from a voltage generation mode to a torque generation mode;

In one embodiment, after the vehicle is powered on, the driver performs a start operation, and the ECU sends a start state request to the generator. After receiving the request, the generator enters the start state, consumes the battery power and converts it into kinetic energy, drives the crankshaft to rotate, and starts the engine. When the engine speed is relatively stable, the ECU sends a power generation state request and a set voltage value request to the generator. The power generation state request is used to control the generator to enter the power generation state, and the set voltage value request is used to request the generator to output a set voltage value. Among them, the set voltage value is related to the vehicle load and the battery model and power. Exemplarily, the set voltage value can be 14V. Further, the output electric energy under the set voltage value is converted, and the required torque corresponding to the output electric energy corresponding to the set voltage value is calculated, and the current available torque is obtained. It is confirmed whether the available torque can meet the output of electric energy at the set voltage value. When the available torque is less than the required torque corresponding to the set voltage value, it means that the available torque cannot meet the demand for outputting the set voltage value. Therefore, the generator needs to output full power according to the current available torque, minimize the discharge of the battery, and meet the power consumption of the vehicle with a large load at the same time, and reduce the power feeding situation.

S103, obtaining an actual output voltage value of the generator in a torque generation mode;

In one embodiment, when the generator generates electricity in the torque power generation mode, the actual output voltage value obtained by using the torque power generation mode is obtained. Because the vehicle driving conditions are complex, the available torque of the generator will also change accordingly. Therefore, when the torque power generation mode is used, the actual output voltage value of the generator must be monitored at all times to prevent the change in vehicle conditions from causing the available torque of the generator to increase, thereby causing the actual output voltage value to be too high, causing overcurrent, and forming a large current to impact the battery and vehicle load. Taking the set voltage value of 14V as an example, the generator currently uses the torque power generation mode and outputs at the maximum available torque of 7N, and the corresponding output voltage value is 13.2V. At this time, the change in vehicle conditions causes the available torque to become 13N, and the corresponding output voltage value is 15V, which will generate a large current and cause impact.

S104, when the actual output voltage value is greater than the set voltage value, controlling the generator to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode controlling the generator to output voltage according to the set voltage value.

In one embodiment, when the actual output voltage value is not greater than the set voltage value, that is, it means that the power generation using the current available torque is still less than the set voltage value, the generator still maintains the torque power generation mode. When the actual output voltage value is greater than the set voltage value, it means that continuing to generate power according to the current available torque will cause impact, so the generator needs to switch to the voltage power generation mode and generate power according to the set voltage value, so that the power generation mode can be switched in time. It should be noted that using the set voltage value to limit the output power of the generator in the voltage power generation mode can prevent the voltage generated when the generator is at full power output from being too large, causing an excessive voltage difference between the generator output voltage and the battery voltage, and then causing the generator output current to be too large, causing impact and damage to the battery and the load in the vehicle.

In the embodiment of the present specification, by obtaining the available torque of the vehicle generator, when the available torque is less than the required torque corresponding to the set voltage value, the generator is controlled to switch from the voltage generation mode to the torque generation mode, and the actual output voltage value of the generator in the torque generation mode is obtained. When the actual output voltage value is greater than the set voltage value, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and output voltage according to the set voltage value. By monitoring the available torque and the actual output voltage value of the vehicle and comparing them with the set voltage value, the automatic switching of the generator generation mode can be realized, thereby adapting to different vehicle driving conditions and better meeting the vehicle's power demand.

Please refer to Figure 3, which is a flow chart of a generator control method according to an embodiment of the present specification. As shown in Figure 3, the method according to the embodiment of the present specification may include the following steps S201-S210.

S201, when the generator is started in the voltage generation mode, obtaining an actual output voltage value;

In one embodiment, after receiving the power generation state request, the generator enters the power generation state, and usually outputs according to a preset voltage value first. The preset voltage value is an empirical value, for example, set to 10V (lower than the set voltage value). In the process of increasing the voltage by using the voltage generation method, it is necessary to first compare the actual output voltage value with the set voltage value, and determine whether the actual output voltage value still needs to be adjusted based on the comparison result. If the actual output voltage value is less than the set voltage value, the generator increases the output voltage to approach the set voltage value.

S202, when the actual output voltage value is less than the set voltage value, controlling the actual output voltage value to increase by a preset increase amount, and executing the step of obtaining the actual output voltage value until the actual output voltage value is equal to the set voltage value, thereby obtaining the available torque of the vehicle generator;

In one embodiment, if the actual output voltage value is less than the set voltage value, it is necessary to control the actual output voltage value to increase according to a preset increase amount, and then gradually approach the set voltage value. The preset increase amount is less than or equal to the difference between the actual output voltage value and the set voltage value, so that the actual output voltage value does not exceed the required set voltage value. Specifically, when using a voltage power generation method, the generator usually does not directly increase from 10V (the initial preset voltage value) to 14V (the set voltage value) output, but changes according to a certain gradient, with a gentle upward trend, thereby avoiding the rapid change of voltage caused by the sudden increase method, which in turn causes a sudden increase in engine load and large fluctuations in engine speed, thereby ensuring the working stability of the engine.

When the actual output voltage value is equal to the set voltage value, the step of obtaining the available torque of the vehicle generator can be executed. That is, when the generator starts to generate electricity after the vehicle is started, it is necessary to confirm whether to switch to the torque generation mode according to the available torque after the actual output voltage value is equal to the set voltage value.

S203, when the set voltage value changes, obtaining the available torque of the generator;

In one embodiment, during the operation of the vehicle, when the vehicle load and the battery power change, the set voltage value required by the vehicle may change, that is, the ECU will resend the set voltage value request to the generator. At this time, the generator needs to re-determine whether the available torque meets the required torque corresponding to the updated set voltage value. It can be understood that as long as it is determined that the current available torque cannot meet the output of electrical energy at the set voltage value, the generator will adopt the torque generation mode to generate electricity.

S204, confirming the available torque of the generator based on the current speed and maximum power of the generator;

In one embodiment, the maximum charging power of the vehicle battery is added to the current power consumption of the low-voltage electrical appliances to obtain the maximum allowable power of the motor; the current speed of the generator is obtained, and the maximum power is divided by the current speed to obtain the current maximum available torque of the generator.

S205, confirming the output power of the generator according to the set voltage value;

In one embodiment, in order to confirm the required torque, the output power of the generator may be calculated according to the set voltage value requested by the ECU and the output current of the generator.

S206, confirming a required torque based on the output power, the current speed, and a performance curve of the generator;

In one embodiment, after the output power is obtained, the required torque corresponding to the set voltage value can be confirmed based on the output power of the generator, the current speed and the generator performance curve. Among them, the generator performance curve is used to describe the output power and torque characteristics of the generator. The horizontal axis of the generator performance curve is the engine speed (revolutions per minute, or rpm), and the vertical axis is the power and torque of the generator. The required torque can be confirmed in the generator performance curve by the current speed and output power. It should be noted that the generator performance curve is affected by many factors, including the generator model, structure, material, control strategy, etc. Therefore, different models of generators may have different performance curves, and the generator performance curve can be confirmed according to the model of the generator currently used.

S207, when the available torque is less than the required torque corresponding to the set voltage value, controlling the generator to switch from the voltage generation mode to the torque generation mode;

For details, please refer to the description of step S102 in the above-mentioned embodiment of the specification, which will not be elaborated here.

S208, determining an outputtable voltage value according to the available torque, and controlling the generator to output a voltage according to the outputtable voltage value;

In one embodiment, when the available torque is less than the required torque corresponding to the set voltage value, the generator will adopt the torque power generation mode. At this time, the output voltage value corresponding to the available torque is confirmed according to the available torque, and then the generator is controlled to generate electricity according to the output voltage value. For example, the maximum output power that the motor can provide under the available torque can be calculated based on the available torque and the specification parameters of the generator. Then, based on the calculated maximum output power and rated voltage, the output voltage value that the generator can provide under the current maximum available torque is calculated. It should be noted that when the torque power generation mode is adopted, in order to prevent the battery from losing power too quickly, a quick response is required, that is, the generator monitors the available torque in real time, and when the requirements of the torque power generation mode are met, it immediately generates electricity with the available torque.

S209, when the actual output voltage value is greater than the set voltage value, obtaining a duration during which the actual output voltage value is greater than the set voltage value;

In one embodiment, when the actual output voltage value is greater than the set voltage value, it is necessary to determine the duration of the actual output voltage value being greater than the set voltage value, that is, a time determination is required before the power generation mode is switched. By determining the duration, it is possible to prevent the generator output voltage value from occasionally fluctuating greater than the set voltage value under abnormal circumstances. After switching to the voltage power generation mode, it is determined that the available torque is insufficient, and it is switched to torque power generation again, causing the generator to frequently switch between the two power generation modes, resulting in frequent fluctuations in speed, current and voltage. Please refer to Figure 4, which is an example schematic diagram of a generator control method provided in an embodiment of this specification. Figure 4 takes the ISG motor power generation mode switching judgment time of 1ms as an example for testing. At this time, it can be seen from Figure 4 that the frequent switching of the power generation mode leads to abnormal fluctuations in the ISG speed, current, torque and output voltage.

Exemplarily, when the actual output voltage value is greater than the set voltage value, timing can be started. The actual output voltage value can be collected in real time based on a preset time interval. Therefore, each time an actual output voltage value is collected, the comparison step with the set voltage value can be performed. If the actual output voltage value collected after the preset time interval is still greater than the set voltage value, timing continues until the accumulated duration is greater than the set voltage value, or when the actual output voltage value is less than or equal to the set voltage value, timing is ended to obtain the duration.

S210, when the duration is greater than or equal to the set duration, controlling the generator to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode controlling the generator to output voltage according to the set voltage value.

In one embodiment, when the duration is greater than or equal to the set duration, the generator is controlled to switch from the torque generation mode to the voltage generation mode. It is understandable that switching the generation mode when the duration is greater than or equal to the set duration can improve the reliability of the generation mode switching and reduce unnecessary generation mode switching caused by occasional voltage fluctuations. The set duration can be selected according to actual conditions. If the set duration is too long, the current shock problem cannot be avoided. If the set duration is too short, the determination may fail. For example, the set duration is confirmed to be 50ms based on experience.

Please refer to FIG5, which is a general flow chart of a generator control method provided in an embodiment of this specification. Taking the generator as an ISG motor as an example, in a feasible implementation method, the generator control method can be implemented according to the flow chart. When the vehicle starts and the ECU requests the ISG motor to generate electricity, the generator control method starts to be executed: ① When the ISG motor generates electricity and the voltage changes, and is close to or equal to the set voltage value (equivalent to the target voltage and target voltage value in FIG5), step ② is performed. ② The ISG motor calculates the current available torque to see whether it can meet the required torque output corresponding to the set voltage value: if the result is yes, step ③ is performed; if the result is no, step ⑥ is performed. ③ The ISG motor determines whether the current output voltage value reaches the set voltage value: if the result is yes, step ④ is performed; if the result is no, step ① is performed. ④ The ISG motor continues to generate electricity according to the set voltage value, and step ⑤ is performed. ⑤ The ISG motor determines whether the set voltage value issued by the ECU has changed: if the result is yes, step ② is performed; if the result is no, step ④ is performed. ⑥ The ISG calculates the output voltage value according to the current available torque and generates electricity according to the value, and step ⑦ is performed. ⑦ The ISG motor determines whether the actual output voltage value is greater than the set voltage value: if the result is yes, proceed to step ⑧; if the result is no, proceed to step ⑦. ⑧ The ISG motor determines whether the duration of the actual output voltage value greater than the set voltage value is less than the set duration: if the result is yes, proceed to step ⑦; if the result is no, proceed to step ④. When any of the following conditions is met: the engine is shut down, the ECU stops requesting power generation, or the ISG motor does not generate power, the generator control method is exited.

In an embodiment of the present specification, after the generator is started in the voltage generation mode, the actual output voltage value is obtained. When the actual output voltage value is less than the set voltage value, the actual output voltage value is controlled to increase by a preset increase amount, and the step of obtaining the actual output voltage value is performed until the actual output voltage value is equal to the set voltage value, so that the actual output voltage has a gentle rising trend, thereby avoiding the problem of a sudden increase in engine load and large fluctuations in engine speed caused by a rapid change in voltage due to a sudden increase, thereby ensuring the working stability of the engine, and obtaining the available torque of the vehicle generator after reaching the set voltage value; in addition, by obtaining the available torque of the generator when the set voltage value changes, whether it is the process of the generator starting to generate electricity after the vehicle is started, or the process of the set voltage value changing while the vehicle is running, as long as the power generation decision determines that the current available torque cannot meet the output of electrical energy at the set voltage value, the ISG motor will adopt the torque generation mode to generate electricity. Furthermore, the available torque of the generator can be confirmed by the current speed and maximum power of the generator, the output power of the generator can be confirmed according to the set voltage value, and the required torque can be confirmed based on the output power, the current speed and the performance curve of the generator, so that the available torque and the required torque can be obtained quickly and in real time. When the available torque is less than the required torque corresponding to the set voltage value, the generator is controlled to switch from the voltage generation mode to the torque generation mode. In order to prevent the battery from losing power too quickly, a quick response is required. Therefore, when the torque generation mode is met, the output voltage value is confirmed according to the current available torque, and the generator is controlled to output voltage according to the output voltage value. Furthermore, when the actual output voltage value is greater than the set voltage value, the duration during which the actual output voltage value is greater than the set voltage value is obtained; when the duration is greater than or equal to the set duration, the generator is controlled to switch from the torque power generation mode to the voltage power generation mode; in the voltage power generation mode, the generator is controlled to output the voltage according to the set voltage value; by determining the duration, the generator is controlled to switch from the torque power generation mode to the voltage power generation mode when the duration is greater than the set duration, thereby avoiding frequent fluctuations in speed, current, torque and voltage caused by frequent switching of power generation modes, improving the reliability of power generation mode switching, and reducing unnecessary power generation mode switching due to occasional voltage fluctuations.

The following will introduce the generator control device provided in the embodiment of this specification in detail in conjunction with Figure 6. It should be noted that the generator control device in Figure 6 is used to execute the method of the embodiment shown in Figures 2 to 5 of this specification. For the convenience of description, only the part related to the embodiment of this specification is shown. For the specific technical details not disclosed, please refer to the embodiment shown in Figures 2 to 5 of this specification.

Please refer to FIG6 , which shows a schematic diagram of the structure of a generator control device provided by an exemplary embodiment of the present specification. The generator control device can be implemented as all or part of the device through software, hardware or a combination of both. The device 1 includes a torque acquisition module 11, a first switching module 12, a voltage acquisition module 13, and a second switching module 14.

A torque acquisition module 11, used to acquire the available torque of the vehicle generator;

A first switching module 12, configured to control the generator to switch from a voltage generation mode to a torque generation mode when the available torque is less than a required torque corresponding to a set voltage value;

A voltage acquisition module 13 is used to acquire an actual output voltage value of the generator in a torque generation mode;

The second switching module 14 is used for controlling the generator to switch from the torque power generation mode to the voltage power generation mode when the actual output voltage value is greater than the set voltage value, and controlling the generator to output voltage according to the set voltage value in the voltage power generation mode.

Optionally, the torque acquisition module 11 is also used to obtain an actual output voltage value after the generator is started in a voltage generation mode;

When the actual output voltage value is less than the set voltage value, controlling the actual output voltage value to increase by a preset increase amount, and executing the step of obtaining the actual output voltage value until the actual output voltage value is equal to the set voltage value, thereby obtaining the available torque of the vehicle generator;

Wherein, the preset increase amount is less than or equal to the difference between the actual output voltage value and the set voltage value.

Optionally, the torque acquisition module 11 is further used to acquire the available torque of the generator when the set voltage value changes.

Optionally, the torque acquisition module 11 is specifically used to confirm the available torque of the generator based on the current rotation speed and maximum power of the generator.

Optionally, the torque acquisition module 11 is further used to confirm the output power of the generator according to the set voltage value;

A required torque is determined based on the output power, a current speed of the generator, and a performance graph of the generator.

Optionally, the first switching module 12 is further configured to determine an outputtable voltage value according to the available torque, and control the generator to output a voltage according to the outputtable voltage value.

Optionally, the second switching module 14 is specifically configured to obtain a duration during which the actual output voltage value is greater than the set voltage value when the actual output voltage value is greater than the set voltage value;

When the duration is greater than or equal to a set duration, the generator is controlled to switch from a torque generation mode to a voltage generation mode, and in the voltage generation mode, the generator is controlled to output a voltage according to the set voltage value.

It should be noted that the generator control device provided in the above embodiment only uses the division of the above functional modules as an example when executing the generator control method. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the generator control device provided in the above embodiment and the generator control method embodiment belong to the same concept, and the implementation process thereof is detailed in the method embodiment, which will not be repeated here.

The serial numbers of the embodiments of the present specification are for description only and do not represent the advantages and disadvantages of the embodiments. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

The embodiments of this specification also provide a computer storage medium, on which a computer program is stored. When the computer program is executed by a processor, a generator control method as shown in the embodiments of Figures 2 to 5 is implemented. The specific execution process can be found in the specific description of the embodiments shown in Figures 2 to 5, which will not be repeated here.

Please refer to Figure 7, which shows a schematic diagram of the structure of a vehicle provided in an embodiment of this specification. The vehicle in this specification may include one or more of the following components: a processor 110, a memory 120, an input device 130, an output device 140, and a bus 150. The processor 110, the memory 120, the input device 130, and the output device 140 may be connected via a bus 150.

The processor 110 may include one or more processing cores. The processor 110 uses various interfaces and lines to connect various parts of the entire vehicle, and executes various functions and processes data of the terminal 100 by running or executing instructions, programs, code sets or instruction sets stored in the memory 120, and calling data stored in the memory 120. Optionally, the processor 110 can be implemented in at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), and programmable logic array (PLA). The processor 110 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user pages, and applications; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 110, but may be implemented separately through a communication chip.

The memory 120 may include a random access memory (RAM) or a read-only memory (ROM). Optionally, the memory 120 includes a non-transitory computer-readable medium (Non-Transitory Computer-Readable Storage Medium). The memory 120 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 120 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc. The operating system may be an Android system, including a system deeply developed based on the Android system, an IOS system developed by Apple, including a system deeply developed based on the IOS system or other systems.

The memory 120 can be divided into an operating system space and a user space. The operating system runs in the operating system space, and native and third-party applications run in the user space. In order to ensure that different third-party applications can achieve good operating results, the operating system allocates corresponding system resources to different third-party applications. However, the requirements for system resources in different application scenarios in the same third-party application are also different. For example, in the local resource loading scenario, the third-party application has higher requirements for disk reading speed; in the animation rendering scenario, the third-party application has higher requirements for GPU performance. The operating system and third-party applications are independent of each other, and the operating system often cannot perceive the current application scenario of the third-party application in a timely manner, resulting in the operating system being unable to perform targeted system resource adaptation according to the specific application scenario of the third-party application.

In order for the operating system to distinguish the specific application scenarios of third-party applications, it is necessary to open up data communication between third-party applications and the operating system so that the operating system can obtain the current scenario information of third-party applications at any time, and then perform targeted system resource adaptation based on the current scenario.

The input device 130 is used to receive input commands or data, and includes but is not limited to a keyboard, a mouse, a camera, a microphone, or a touch device. The output device 140 is used to output commands or data, and includes but is not limited to a display device and a speaker. In one example, the input device 130 and the output device 140 can be combined, and the input device 130 and the output device 140 are touch screen displays.

The touch display screen can be designed as a full screen, a curved screen or a special-shaped screen. The touch display screen can also be designed as a combination of a full screen and a curved screen, or a combination of a special-shaped screen and a curved screen, which is not limited in the embodiments of this specification.

In addition, those skilled in the art will appreciate that the structure of the vehicle shown in the above drawings does not constitute a limitation on the vehicle, and the vehicle may include more or fewer components than shown, or a combination of certain components, or a different arrangement of components. For example, the vehicle also includes components such as a radio frequency circuit, an input unit, a sensor, an audio circuit, a WiFi module, a power supply, and a Bluetooth module, which will not be described in detail here.

In the vehicle shown in FIG. 7 , the processor 110 may be used to call a computer application stored in the memory 120 and specifically perform the following operations:

Obtaining available torque of a vehicle generator;

When the available torque is less than the required torque corresponding to the set voltage value, controlling the generator to switch from the voltage generation mode to the torque generation mode;

Acquiring an actual output voltage value of the generator in a torque generation mode;

When the actual output voltage value is greater than the set voltage value, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode, the generator is controlled to output a voltage according to the set voltage value.

In one embodiment, when the processor 110 executes the acquisition of the available torque of the vehicle engine, the processor 110 specifically performs the following operations:

When the generator is started in voltage generation mode, the actual output voltage value is obtained;

When the actual output voltage value is less than the set voltage value, controlling the actual output voltage value to increase by a preset increase amount, and executing the step of obtaining the actual output voltage value until the actual output voltage value is equal to the set voltage value, thereby obtaining the available torque of the vehicle generator;

Wherein, the preset increase amount is less than or equal to the difference between the actual output voltage value and the set voltage value.

In one embodiment, when the processor 110 executes the acquisition of the available torque of the vehicle generator, the processor 110 specifically performs the following operations:

When the set voltage value changes, the available torque of the generator is obtained.

In one embodiment, the processor 110 may further perform the following operations:

confirming the output power of the generator according to the set voltage value;

A required torque is determined based on the output power, a current speed of the generator, and a performance graph of the generator.

In one embodiment, after the processor 110 controls the generator to switch from the voltage generation mode to the torque generation mode when the available torque is less than the required torque corresponding to the set voltage value, it further performs the following operations:

An outputtable voltage value is determined according to the available torque, and the generator is controlled to output a voltage according to the outputtable voltage value.

In one embodiment, when the actual output voltage value is greater than the set voltage value, the processor 110 controls the generator to switch from the torque generation mode to the voltage generation mode, and controls the generator to output voltage according to the set voltage value in the voltage generation mode, and specifically performs the following operations:

When the actual output voltage value is greater than the set voltage value, obtaining a duration during which the actual output voltage value is greater than the set voltage value;

When the duration is greater than or equal to a set duration, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode, the generator is controlled to output a voltage according to the set voltage value.

In the embodiment of the present specification, by obtaining the available torque of the vehicle generator, when the available torque is less than the required torque corresponding to the set voltage value, the generator is controlled to switch from the voltage generation mode to the torque generation mode, and the actual output voltage value of the generator in the torque generation mode is obtained. When the actual output voltage value is greater than the set voltage value, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and output voltage according to the set voltage value. By monitoring the available torque and the actual output voltage value of the vehicle and comparing them with the set voltage value, the automatic switching of the generator generation mode can be realized, thereby adapting to different vehicle driving conditions and better meeting the vehicle's power demand.

Furthermore, after the generator is started in the voltage generation mode, the actual output voltage value is obtained. When the actual output voltage value is less than the set voltage value, the actual output voltage value is controlled to increase by a preset increase amount, and the step of obtaining the actual output voltage value is executed until the actual output voltage value is equal to the set voltage value, so that the actual output voltage has a gentle rising trend, thereby avoiding the problem of a sudden increase in engine load and large fluctuations in engine speed caused by a rapid change in voltage due to a sudden increase, thereby ensuring the working stability of the engine, and obtaining the available torque of the vehicle generator after reaching the set voltage value; in addition, by obtaining the available torque of the generator when the set voltage value changes, whether it is the process of the generator starting to generate electricity after the vehicle is started, or the process of the set voltage value changing while the vehicle is running, as long as the power generation decision determines that the current available torque cannot meet the output of electrical energy at the set voltage value, the ISG motor will adopt the torque generation mode to generate electricity. Furthermore, the available torque of the generator can be confirmed by the current speed and maximum power of the generator, the output power of the generator can be confirmed according to the set voltage value, and the required torque can be confirmed based on the output power, the current speed and the performance curve of the generator, so that the available torque and the required torque can be obtained quickly and in real time. When the available torque is less than the required torque corresponding to the set voltage value, the generator is controlled to switch from the voltage generation mode to the torque generation mode. In order to prevent the battery from losing power too quickly, a quick response is required. Therefore, when the torque generation mode is met, the output voltage value is confirmed according to the current available torque, and the generator is controlled to output voltage according to the output voltage value. Furthermore, when the actual output voltage value is greater than the set voltage value, the duration during which the actual output voltage value is greater than the set voltage value is obtained; when the duration is greater than or equal to the set duration, the generator is controlled to switch from the torque power generation mode to the voltage power generation mode; in the voltage power generation mode, the generator is controlled to output the voltage according to the set voltage value; by determining the duration, the generator is controlled to switch from the torque power generation mode to the voltage power generation mode when the duration is greater than the set duration, thereby avoiding frequent fluctuations in speed, current, torque and voltage caused by frequent switching of power generation modes, improving the reliability of power generation mode switching, and reducing unnecessary power generation mode switching due to occasional voltage fluctuations.

In addition, an embodiment of the present specification provides a computer program product, which includes a computer program. When the computer program is executed by a processor of a vehicle, the processor can at least implement the generator control method provided in the embodiments shown in Figures 2 to 5 above.

A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the above-mentioned program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the above-mentioned storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

The above disclosure is only the preferred embodiment of this specification, which certainly cannot be used to limit the scope of rights of this specification. Therefore, equivalent changes made according to the claims of this specification are still within the scope covered by this specification.

Claims (10)

1. A generator control method, characterized in that the method comprises: Obtaining available torque of a vehicle generator; When the available torque is less than the required torque corresponding to the set voltage value, controlling the generator to switch from the voltage generation mode to the torque generation mode; Acquiring an actual output voltage value of the generator in a torque generation mode; When the actual output voltage value is greater than the set voltage value, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode, the generator is controlled to output a voltage according to the set voltage value. 2. The method according to claim 1, characterized in that the obtaining of the available torque of the vehicle engine comprises: When the generator is started in voltage generation mode, the actual output voltage value is obtained; When the actual output voltage value is less than the set voltage value, controlling the actual output voltage value to increase by a preset increase amount, and executing the step of obtaining the actual output voltage value until the actual output voltage value is equal to the set voltage value, thereby obtaining the available torque of the vehicle generator; Wherein, the preset increase amount is less than or equal to the difference between the actual output voltage value and the set voltage value. 3. The method according to claim 1, characterized in that the obtaining of the available torque of the vehicle generator comprises: When the set voltage value changes, the available torque of the generator is obtained. 4. The method according to any one of claims 1 to 3, characterized in that the obtaining of the available torque of the vehicle generator comprises: Based on the current speed and maximum power of the generator, available torque of the generator is determined. 5. The method according to claim 1, characterized in that the method further comprises: confirming the output power of the generator according to the set voltage value; A required torque is determined based on the output power, a current speed of the generator, and a performance graph of the generator. 6. The method according to claim 1, characterized in that when the available torque is less than the required torque corresponding to the set voltage value, after controlling the generator to switch from the voltage generation mode to the torque generation mode, it further comprises: An outputtable voltage value is determined according to the available torque, and the generator is controlled to output a voltage according to the outputtable voltage value. 7. The method according to claim 1, characterized in that when the actual output voltage value is greater than the set voltage value, controlling the generator to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode controlling the generator to output voltage according to the set voltage value, comprises: When the actual output voltage value is greater than the set voltage value, obtaining a duration during which the actual output voltage value is greater than the set voltage value; When the duration is greater than or equal to a set duration, the generator is controlled to switch from the torque generation mode to the voltage generation mode, and in the voltage generation mode, the generator is controlled to output a voltage according to the set voltage value. 8. A generator control device, characterized in that the device comprises: A torque acquisition module, for acquiring available torque of a vehicle generator; A first switching module, configured to control the generator to switch from a voltage generation mode to a torque generation mode when the available torque is less than a required torque corresponding to a set voltage value; A voltage acquisition module, used to acquire an actual output voltage value of the generator in a torque generation mode; The second switching module is used to control the generator to switch from the torque power generation mode to the voltage power generation mode when the actual output voltage value is greater than the set voltage value, and to control the generator to output voltage according to the set voltage value in the voltage power generation mode. 9. A vehicle, characterized in that the vehicle comprises: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the steps of the method according to any one of claims 1 to 7. 10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 7 is implemented.