Plug-in Hybrid Vehicle Acceleration Control Method and Device

Abstract

The present application provides a method for controlling the acceleration of a plug-in hybrid vehicle, which relates to the field of controlling the vehicle's electronic control system. When the operating parameters of the vehicle meet the preset operating conditions, not only the opening degree of the accelerator pedal is monitored, but also the opening rate of the accelerator pedal is monitored, so as to determine whether the driver has an emergency acceleration request. When it is detected that the opening rate of the accelerator pedal is large, it indicates that the driver has an emergency acceleration request. At this time, the corresponding relationship between the opening degree of the accelerator pedal and the output torque is updated, and the original torque relationship table is replaced with a gain torque relationship table. The output torque corresponding to the same opening degree of the accelerator pedal in the gain torque relationship table is greater than the output torque in the original torque relationship table. Finally, the motor output torque corresponding to the opening degree of the accelerator pedal is obtained from the replaced gain torque relationship table, so that the motor can output a greater torque in advance, improve the power response, and shorten the acceleration time.

Description

Technical Field

[0001] This application relates to the field of vehicle electronic control system control, and particularly to an acceleration control method and device for a plug-in hybrid vehicle. Background Art

[0002] For a plug-in hybrid electric vehicle (PHEV), there are generally three power modes, including pure electric mode, hybrid mode, and pure gasoline mode. Among them, the hybrid mode includes two sub-modes: series mode (the engine charges the battery, and the battery supplies torque to the motor) and parallel mode (the engine and the motor jointly output torque to the wheels). The above multiple modes can be switched in real time according to different vehicle working conditions and the specific needs of the driver.

[0003] Specifically, after the vehicle recognizes that the driver steps on the accelerator pedal, it determines the required torque corresponding to the accelerator pedal opening by looking up a table, controls the vehicle to switch to a suitable power mode, and controls at least one of the internal combustion engine and the motor to output a specific torque.

[0004] However, the traditional technical solution only considers the opening of the accelerator pedal and the smoothness of the motor output. When the driver requests a rapid acceleration, the corresponding motor output torque may not be sufficient to meet the acceleration requirement, resulting in poor vehicle power response and long acceleration time. Summary of the Invention

[0005] In view of this, this application provides an acceleration control method for a plug-in hybrid vehicle, which can improve the vehicle's power response and shorten the acceleration time when the driver requests a rapid acceleration.

[0006] Specifically, the following technical solutions are included:

[0007] On the one hand, this application provides an acceleration control method for a plug-in hybrid vehicle, the method comprising:

[0008] Obtain vehicle working condition parameters, and determine whether the working condition parameters meet preset working condition conditions.

[0009] When it is determined that the working condition parameters meet the preset working condition conditions, monitor the accelerator pedal opening rate and the accelerator pedal opening.

[0010] When it is monitored that the accelerator pedal opening rate is greater than a preset rate, replace the original torque relationship table with a gain torque relationship table. Both the gain torque relationship table and the original torque relationship table store the relationship between the accelerator pedal opening and the motor output torque. For the same accelerator pedal opening, the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table.

[0011] Determine the output torque corresponding to the accelerator pedal opening from the gain torque relationship table.

[0012] Control the input parameters of the motor so that the motor outputs the output torque.

[0013] Optionally, obtain vehicle condition parameters and determine whether the condition parameters meet preset condition conditions, including:

[0014] Obtain the vehicle power mode, driving mode, and remaining battery power.

[0015] Determine whether the vehicle power mode is a hybrid mode, the driving mode is a sport mode, and the remaining battery power is greater than the preset battery power.

[0016] When it is determined that the three conditions that the vehicle power mode is a hybrid mode, the driving mode is a sport mode, and the remaining battery power is greater than the preset battery power are all met, it is determined that the condition parameters meet the preset condition conditions.

[0017] Optionally, after monitoring the accelerator pedal opening rate and the accelerator pedal opening, the method further includes:

[0018] When it is monitored that the accelerator pedal opening is greater than the preset opening, replace the original torque relationship table with the gain torque relationship table.

[0019] Optionally, after replacing the original torque relationship table with the gain torque relationship table and before determining the output torque corresponding to the accelerator pedal opening from the gain torque relationship table, the method further includes:

[0020] Determine whether the vehicle is currently in a series hybrid mode.

[0021] When it is determined that the vehicle is currently in a series hybrid mode, switch the vehicle to a parallel hybrid mode.

[0022] Optionally, the method further includes:

[0023] When it is determined that the condition parameters meet the preset condition conditions and it is monitored that the accelerator pedal opening rate is greater than the preset rate, determine whether the engine water temperature is less than the preset water temperature.

[0024] When it is determined that the engine water temperature is less than the preset water temperature, replace the original torque relationship table with the maximum torque relationship table, and the output torque corresponding to the same accelerator pedal opening in the maximum torque relationship table is greater than the output torque corresponding in the gain torque relationship table.

[0025] On the other hand, the present application also provides a plug-in hybrid vehicle acceleration control device, and the device includes:

[0026] A parameter judgment module, configured to obtain vehicle condition parameters and determine whether the condition parameters meet preset condition conditions.

[0027] The pedal monitoring module is configured to monitor the acceleration pedal opening rate and the acceleration pedal opening degree when it is determined that the operating condition parameters meet the preset operating condition requirements.

[0028] The relationship update module is configured to replace the original torque relationship table with a gain torque relationship table when it is monitored that the acceleration pedal opening rate is greater than the preset rate. Both the gain torque relationship table and the original torque relationship table store the relationship between the acceleration pedal opening degree and the output torque of the motor. For the same acceleration pedal opening degree, the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table.

[0029] The torque determination module is configured to determine the output torque corresponding to the acceleration pedal opening degree from the gain torque relationship table.

[0030] The motor control module is configured to control the input parameters of the motor so that the motor outputs the output torque.

[0031] Optionally, the parameter judgment module includes:

[0032] An acquisition sub-module is configured to acquire the vehicle power mode, the driving mode, and the remaining battery power.

[0033] A judgment sub-module is configured to judge whether the vehicle power mode is a hybrid mode, whether the driving mode is a sport mode, and whether the remaining battery power is greater than the preset battery power.

[0034] The judgment sub-module is further configured to judge that the operating condition parameters meet the preset operating condition requirements when it is judged that the three conditions that the vehicle power mode is a hybrid mode, the driving mode is a sport mode, and the remaining battery power is greater than the preset battery power are all satisfied.

[0035] Optionally, the relationship update module is further configured to replace the original torque relationship table with a gain torque relationship table when it is monitored that the acceleration pedal opening degree is greater than the preset opening degree.

[0036] Optionally, the device further includes a mode control module:

[0037] The mode control module is configured to judge whether the vehicle is currently in a series hybrid mode after replacing the original torque relationship table with the gain torque relationship table and before determining the output torque corresponding to the acceleration pedal opening degree from the gain torque relationship table.

[0038] The mode control module is further configured to switch the vehicle to a parallel hybrid mode when it is judged that the vehicle is currently in a series hybrid mode.

[0039] Optionally, the device further includes a water temperature monitoring module, which is configured to determine whether the engine water temperature is less than a preset water temperature when it is determined that the operating condition parameters meet the preset operating condition conditions and the monitoring of the acceleration pedal opening rate is greater than the preset rate.

[0040] The relationship update module is further configured to replace the original torque relationship table with the maximum torque relationship table when it is determined that the engine water temperature is less than the preset water temperature, and for the same acceleration pedal opening, the corresponding output torque in the maximum torque relationship table is greater than the corresponding output torque in the gain torque relationship table.

[0041] By using the plug-in hybrid vehicle acceleration control method provided in this application, when the operating condition parameters of the vehicle meet the preset operating condition conditions, not only the acceleration pedal opening is monitored, but also the acceleration pedal opening rate is monitored, so as to determine whether the driver has an emergency acceleration request. When it is monitored that the acceleration pedal opening rate is large, it indicates that the driver has an emergency acceleration request. At this time, the corresponding relationship between the acceleration pedal opening and the output torque is updated, and the original torque relationship table is replaced with the gain torque relationship table. For the same acceleration pedal opening, the corresponding output torque in the gain torque relationship table is greater than the output torque in the original torque relationship table. Finally, the motor output torque corresponding to the acceleration pedal opening is obtained from the replaced gain torque relationship table, so that the motor can output a larger torque in advance, improve the power response, and shorten the acceleration time. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 It is a flowchart of the plug-in hybrid vehicle acceleration control method provided in the embodiment of the present application;

[0044] Figure 2 It is another flowchart of the plug-in hybrid vehicle acceleration control method provided in the embodiment of the present application;

[0045] Figure 3 It is a structural diagram of the plug-in hybrid vehicle acceleration control device provided in the embodiment of the present application;

[0046] Figure 4 It is a structural diagram of the parameter judgment module of the plug-in hybrid vehicle acceleration control device provided in the embodiment of the present application. Detailed Embodiments

[0047] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0048] An embodiment of the present application provides a method for controlling the acceleration of a plug-in hybrid vehicle. As Figure 1 shown, the method includes steps S101, S102, S103, S104, and S105, where:

[0049] In step S101, vehicle operating condition parameters are obtained, and it is determined whether the operating condition parameters meet preset operating condition conditions.

[0050] In step S102, when it is determined that the operating condition parameters meet the preset operating condition conditions, the opening rate and opening degree of the accelerator pedal are monitored.

[0051] In step S103, when it is monitored that the opening rate of the accelerator pedal is greater than the preset rate, the original torque relationship table is replaced with a gain torque relationship table. Both the gain torque relationship table and the original torque relationship table store the relationship between the opening degree of the accelerator pedal and the output torque of the motor. For the same opening degree of the accelerator pedal, the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table.

[0052] In step S104, the output torque corresponding to the opening degree of the accelerator pedal is determined from the gain torque relationship table.

[0053] In step S105, the input parameters of the motor are controlled so that the motor outputs the output torque.

[0054] By using the method for controlling the acceleration of a plug-in hybrid vehicle provided by the present application, when the operating condition parameters of the vehicle meet the preset operating condition conditions, not only the opening degree of the accelerator pedal is monitored, but also the opening rate of the accelerator pedal is monitored, so as to determine whether the driver has a request for rapid acceleration. When it is monitored that the opening rate of the accelerator pedal is large, it indicates that the driver has a request for rapid acceleration. At this time, the corresponding relationship between the opening degree of the accelerator pedal and the output torque is updated, and the original torque relationship table is replaced with a gain torque relationship table. For the same opening degree of the accelerator pedal, the corresponding output torque in the gain torque relationship table is greater than the output torque in the original torque relationship table. Finally, the output torque of the motor corresponding to the opening degree of the accelerator pedal is obtained from the replaced gain torque relationship table, so that the motor can output a larger torque in advance, improve the power response, and shorten the acceleration time.

[0055] An embodiment of the present application provides a method for controlling the acceleration of a plug-in hybrid vehicle. As Figure 2As shown, the method includes steps S201, S202, S203, S204, S205, S206, S207, S208, S209, S210, S211, S212, S213 and S214, where:

[0056] Since a plug-in hybrid vehicle is not suitable for rapid acceleration under all working conditions, before determining whether the driver has a rapid acceleration request, it is also necessary to pre-obtain vehicle working condition parameters and determine whether the working condition parameters meet preset working condition conditions.

[0057] Specifically, in step S201, the vehicle power mode, driving mode and remaining battery charge are obtained.

[0058] It can be understood that the vehicle power mode is used to indicate the current energy output mode of the vehicle, including pure electric mode, hybrid mode and pure gasoline mode. The driving mode is used to indicate the aggressiveness of the current torque output of the vehicle, including economy mode, normal mode and sport mode. The above vehicle power mode and driving mode can both be set by the driver on the central control screen or using physical entity buttons.

[0059] The remaining battery charge refers to the remaining battery charge of the vehicle's battery pack and can be obtained from the battery management system.

[0060] In some alternative embodiments, it is also necessary to pre-determine whether the vehicle's high-voltage electricity is energized, rather than being in a mode where only low-voltage electricity is supplied to power in-vehicle appliances.

[0061] In step S202, it is determined whether the three conditions that the vehicle power mode is hybrid mode, the driving mode is sport mode, and the remaining battery charge is greater than the preset battery charge are all met.

[0062] It can be understood that in pure electric mode, only the motor of the vehicle works and the engine is in the off state. In pure gasoline mode, only the engine of the vehicle works and the motor is in the off state. Therefore, the vehicle cannot output maximum power in pure electric mode and pure gasoline mode. The hybrid mode refers to the mode where the engine and the motor work simultaneously. In this mode, the vehicle can obtain greater torque. In economy mode and normal mode, the gearshift speed threshold of the vehicle's transmission and the motor output power will both be reduced, and the vehicle's power cannot be fully output either. The sport mode refers to the mode with the most aggressive torque output. In sport mode, the gearshift speed threshold of the transmission is increased, that is, the engine can increase the speed to the range where higher torque is output, and at the same time, the limit on the motor output power is lifted, enabling the motor to output maximum power. And in sport mode, the motor delay time is the shortest and the acceleration pedal responsiveness is the fastest.

[0063] It can be understood that corresponding torque mapping relationships can be set in advance for different power modes and driving modes to represent the relationship between the accelerator pedal opening, the motor output torque, and the engine output torque.

[0064] The remaining battery power is directly related to the remaining driving range of the vehicle. If the remaining battery power is too small, from a safety perspective, the motor output power and the maximum vehicle speed will also be limited to ensure that the motor operates in the most power-saving mode, reduce the power consumption of the power battery, slow down the rate of decline of the driving range, and enable the vehicle to reach the charging station for charging smoothly. Only when the remaining battery power is greater than the preset power can the vehicle safely output full power.

[0065] It can be understood that when it is determined that the three conditions of the vehicle power mode being the hybrid mode, the driving mode being the sport mode, and the remaining battery power being greater than the preset power are all met, it means that the vehicle is ready to output maximum power at this time and can amplify the output torque according to the driver's sudden acceleration demand.

[0066] Therefore, when it is determined that the three conditions of the vehicle power mode being the hybrid mode, the driving mode being the sport mode, and the remaining battery power being greater than the preset power are all met, it is determined that the operating condition parameters meet the preset operating condition conditions, and step S203 is executed.

[0067] In step S203, the accelerator pedal opening rate and the accelerator pedal opening are monitored.

[0068] It can be understood that the accelerator pedal opening rate and the opening are parameters that can most directly represent the driver's acceleration demand. The accelerator pedal opening rate refers to the angular velocity of the accelerator pedal, and the direction of this angular velocity is from the initial position of the accelerator pedal to the position with the largest accelerator pedal opening. The greater the accelerator pedal opening rate, that is, the greater the angular velocity, it means that the driver uses more force to step on the pedal and the speed is also faster, indicating a sudden acceleration demand. Similarly, when the accelerator pedal opening is larger, it means that the driver steps on the pedal deeper, also indicating a sudden acceleration request.

[0069] When it is determined that the operating condition parameters do not meet the preset operating condition conditions, it means that the vehicle cannot output maximum power at this time. Even if the subsequent torque amplification process is carried out, a better acceleration feeling cannot be obtained, and it may also cause the vehicle's driving range to decrease rapidly. In this case, it will return to step S201 to continue to loop to obtain the vehicle power mode, driving mode, and remaining battery power and determine whether the operating condition parameters meet the preset operating condition conditions, preparing for the next torque amplification output.

[0070] It can be understood that in certain specific situations, even when the driving mode is the hybrid mode, that is, the engine and the motor work simultaneously, the engine may not be in the best working state at this time. For example, the engine water temperature is too low. A too low water temperature means that the engine oil temperature is too low. The engine oil has poor fluidity and uneven distribution in the engine, and cannot play its due lubricating role. In this case, considering the wear of the engine, the output speed and torque of the engine will be limited to avoid excessive wear and shorten the engine life. Therefore, in this case, the motor will be given priority to output a greater torque to make up for the torque gap of the engine.

[0071] Specifically, in step S204, when it is monitored that the opening rate of the accelerator pedal is greater than the preset rate, it is judged whether the engine water temperature is less than the preset water temperature.

[0072] It can be understood that the preset water temperature can be 70°-90°.

[0073] As one of the judgment results of step S204, when it is judged that the engine water temperature is not less than the preset water temperature, go to step S205.

[0074] In step S205, the original torque relationship table is replaced with the gain torque relationship table.

[0075] Specifically, both the gain torque relationship table and the original torque relationship table store the relationship between the accelerator pedal opening and the output torque of the motor. For the same accelerator pedal opening, the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table.

[0076] Specifically, both the gain torque relationship table and the original torque relationship table can be pre-stored in the storage unit of the vehicle control unit. Since the output characteristic curve of the motor is different from that of the engine, the maximum torque range of the motor is wider than that of the engine, and it can burst out a larger torque in a short time. Therefore, for the sake of smooth acceleration, in the general state, the vehicle will determine the relationship between the accelerator pedal opening and the output torque of the motor according to the original torque relationship table, so that the output torque of the motor increases gently as the accelerator pedal opening increases, simulating the acceleration characteristics of the engine and improving the smoothness of acceleration. When it is judged by the foregoing steps S201-S204 that the driver has a request for rapid acceleration and the engine water temperature is appropriate and not less than the preset water temperature, it indicates that the original torque relationship table can be replaced with the gain torque relationship table. Since the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table for the same accelerator pedal opening, when the vehicle determines the relationship between the accelerator pedal opening and the output torque of the motor according to the gain torque relationship table, the output torque of the motor can be amplified.

[0077] As another judgment result of step S204 and a parallel step of step S205, when it is judged that the engine water temperature is lower than the preset water temperature, go to step S206.

[0078] In step S206, the original torque relationship table is replaced with the maximum torque relationship table.

[0079] For the same accelerator pedal opening, the corresponding output torque in the maximum torque relationship table is greater than the corresponding output torque in the gain torque relationship table.

[0080] As introduced above, when it is judged that the engine water temperature is lower than the preset water temperature, it indicates that the engine is not in the best working state. In this case, the motor will be preferentially made to output a greater torque to make up for the torque gap of the engine. To achieve a greater torque output of the motor, the original torque relationship table will be replaced with the maximum torque relationship table, and the maximum torque relationship table can also be pre-stored in the storage unit of the vehicle controller. Since for the same accelerator pedal opening, the corresponding output torque in the maximum torque relationship table is greater than the corresponding output torque in the gain torque relationship table, when the vehicle determines the relationship between the accelerator pedal opening and the output torque of the motor according to the maximum torque relationship table, the output torque of the motor can be further amplified to make up for the torque gap of the engine.

[0081] In some alternative embodiments, the accelerator pedal opening can also be used to assist in judging whether the driver has an emergency acceleration request. Specifically, a forced downshift switch can be set in the accelerator pedal. When the accelerator pedal opening is greater than the preset opening, the forced downshift switch is triggered, indicating that the driver has deeply stepped on the accelerator pedal at this time and has an emergency acceleration requirement. Therefore, as another judgment method, after monitoring the accelerator pedal opening rate and the accelerator pedal opening, as a step executed simultaneously with step S204, the method further includes:

[0082] In step S207, when it is monitored that the accelerator pedal opening is greater than the preset opening, the original torque relationship table is replaced with the gain torque relationship table.

[0083] In some alternative embodiments, similar to the above steps S204 - S206, when it is monitored that the accelerator pedal opening is greater than the preset opening, the size relationship between the engine water temperature and the preset water temperature can also be judged. Only when the engine water temperature is greater than the preset water temperature, the original torque relationship table is replaced with the gain torque relationship table. When the engine water temperature is lower than the preset water temperature, the original torque relationship table is replaced with the maximum torque relationship table.

[0084] In some alternative embodiments, the engine water temperature can also be used as a vehicle operating condition parameter, and the above steps S201 - S202 can be directly used to pre-judge whether the engine water temperature is lower than the preset water temperature.

[0085] It can be understood that since the hybrid mode further includes a series hybrid mode and a parallel hybrid mode, only in the parallel hybrid mode can the vehicle output the maximum power, and the power output of the vehicle in the series hybrid mode is relatively low. Therefore, after replacing the original torque relationship table with the gain torque relationship table, it is also necessary to determine whether the current vehicle is in the series hybrid mode.

[0086] Specifically, after replacing the original torque relationship table with the gain torque relationship table in step S205 or step S207, the method further includes:

[0087] In step S208, determine whether the vehicle is currently in the series hybrid mode.

[0088] When it is determined that the vehicle is currently in the series hybrid mode, jump to step S209.

[0089] In step S209, switch the vehicle to the parallel hybrid mode.

[0090] It can be understood that when it is determined in step S208 that the vehicle is not currently in the series hybrid mode, it means that the vehicle is in the parallel hybrid mode at this time, and then it can directly jump to step S210 without performing step S209.

[0091] In step S210, determine the output torque corresponding to the accelerator pedal opening from the gain torque relationship table.

[0092] In step S211, control the input parameters of the motor so that the motor outputs the output torque.

[0093] Similarly, after replacing the original torque relationship table with the maximum torque relationship table, it is also necessary to determine whether the current vehicle is in the series hybrid mode.

[0094] Therefore, after replacing the original torque relationship table with the maximum torque relationship table in step S206, the method also includes:

[0095] In step S212, determine whether the vehicle is currently in the series hybrid mode.

[0096] When it is determined that the vehicle is currently in the series hybrid mode, jump to step S213.

[0097] In step S213, switch the vehicle to the parallel hybrid mode.

[0098] It can be understood that when it is determined in step S212 that the vehicle is not currently in the series hybrid mode, it means that the vehicle is in the parallel hybrid mode at this time, and then it can directly jump to step S214 without performing step S213.

[0099] In step S214, the output torque corresponding to the accelerator pedal opening is determined from the maximum torque relationship table.

[0100] After finally determining the output torque using step S214, it also jumps to step S211, that is, controlling the input parameters of the motor so that the motor outputs this output torque.

[0101] After controlling the motor to output this output torque using step S211, the vehicle can output a larger output torque even when the accelerator pedal opening is small, enabling the motor power to be output in advance to meet the driver's sudden acceleration demand. It can be understood that the so-called advance output here does not mean that the motor power is output in advance before the driver steps on the accelerator pedal, which is obviously unreasonable and unsafe. The advance output of the motor power means that during the process of stepping on the accelerator pedal, compared with the ordinary smooth acceleration situation, the same accelerator pedal opening can correspond to a higher output torque, enabling the motor torque to be released quickly in advance.

[0102] Using the plug-in hybrid vehicle acceleration control method provided in this application, when the vehicle's operating condition parameters meet the preset operating condition requirements, not only the accelerator pedal opening is monitored, but also the accelerator pedal opening rate is monitored, so as to determine whether the driver has a sudden acceleration request. When it is detected that the accelerator pedal opening rate is large, it indicates that the driver has a sudden acceleration request. At this time, the correspondence relationship between the accelerator pedal opening and the output torque is updated, and the gain torque relationship table is used to replace the original torque relationship table. The output torque corresponding to the same accelerator pedal opening in the gain torque relationship table is larger than that in the original torque relationship table. Finally, the motor output torque corresponding to the accelerator pedal opening is obtained from the replaced gain torque relationship table, so that the motor can output a larger torque in advance, improving the power response and shortening the acceleration time.

[0103] The embodiment of this application also provides a plug-in hybrid vehicle acceleration control device, as Figure 3 shown, the device includes:

[0104] A parameter judgment module 301, configured to obtain the vehicle operating condition parameters and judge whether the operating condition parameters meet the preset operating condition requirements.

[0105] A pedal monitoring module 302, configured to monitor the accelerator pedal opening rate and the accelerator pedal opening when it is judged that the operating condition parameters meet the preset operating condition requirements.

[0106] The relationship update module 303 is configured to replace the original torque relationship table with a gain torque relationship table when it is detected that the opening rate of the accelerator pedal is greater than a preset rate. Both the gain torque relationship table and the original torque relationship table store the relationship between the accelerator pedal opening and the output torque of the motor. For the same accelerator pedal opening, the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table.

[0107] The torque determination module 304 is configured to determine the output torque corresponding to the accelerator pedal opening from the gain torque relationship table.

[0108] The motor control module 305 is configured to control the input parameters of the motor so that the motor outputs the output torque.

[0109] In some alternative embodiments, as Figure 4 shown, the parameter judgment module 301 includes:

[0110] An acquisition sub-module 3011 is configured to acquire the vehicle power mode, driving mode, and remaining power.

[0111] A judgment sub-module 3012 is configured to judge whether the vehicle power mode is a hybrid mode, whether the driving mode is a sport mode, and whether the remaining power is greater than a preset power.

[0112] The judgment sub-module 3012 is further configured to judge that the working condition parameters meet the preset working condition when it is judged that all three conditions of the vehicle power mode being a hybrid mode, the driving mode being a sport mode, and the remaining power being greater than the preset power are satisfied.

[0113] In some alternative embodiments, the relationship update module 303 is further configured to replace the original torque relationship table with a gain torque relationship table when it is detected that the accelerator pedal opening is greater than a preset opening.

[0114] In some alternative embodiments, the device further includes a mode control module 306:

[0115] The mode control module 306 is configured to judge whether the vehicle is currently in a series hybrid mode after replacing the original torque relationship table with the gain torque relationship table and before determining the output torque corresponding to the accelerator pedal opening from the gain torque relationship table.

[0116] The mode control module 306 is further configured to switch the vehicle to a parallel hybrid mode when it is judged that the vehicle is currently in a series hybrid mode.

[0117] In some alternative embodiments, the device further includes a water temperature monitoring module 307, which is configured to determine whether the engine water temperature is less than a preset water temperature when it is determined that the operating condition parameters meet the preset operating condition and the monitoring shows that the opening rate of the accelerator pedal is greater than a preset rate.

[0118] The relationship update module 303 is further configured to replace the original torque relationship table with the maximum torque relationship table when it is determined that the engine water temperature is less than the preset water temperature, and for the same accelerator pedal opening, the corresponding output torque in the maximum torque relationship table is greater than the corresponding output torque in the gain torque relationship table.

[0119] By using the plug-in hybrid vehicle acceleration control device provided in this application, when the operating condition parameters of the vehicle meet the preset operating conditions, not only the opening of the accelerator pedal is monitored, but also the opening rate of the accelerator pedal is monitored, so as to determine whether the driver has an emergency acceleration request. When it is monitored that the opening rate of the accelerator pedal is large, it indicates that the driver has an emergency acceleration request. At this time, the correspondence between the accelerator pedal opening and the output torque is updated, and the original torque relationship table is replaced with the gain torque relationship table. For the same accelerator pedal opening, the corresponding output torque in the gain torque relationship table is greater than the output torque in the original torque relationship table. Finally, the motor output torque corresponding to the accelerator pedal opening is obtained from the replaced gain torque relationship table, so that the motor can output a larger torque in advance, improve the power response, and shorten the acceleration time.

[0120] This embodiment and the method embodiment are based on the same inventive concept and are the device embodiments corresponding to the method embodiment. Therefore, those skilled in the art should understand that the description of the method embodiment is also applicable to this embodiment, and some technical details will not be elaborated in this embodiment.

[0121] The embodiment of the present application further provides a vehicle, including the plug-in hybrid vehicle acceleration control device provided in the previous embodiment.

[0122] In the present application, it should be understood that terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0123] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary.

[0124] It should be understood that the present application is not limited to the exact structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

[0125] The above description is only for the convenience of those skilled in the art to understand the technical solution of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for accelerating control of a plug-in hybrid vehicle, characterized in that, The method includes: Obtaining vehicle operating condition parameters and determining whether the operating condition parameters meet preset operating condition criteria; When it is determined that the operating condition parameters meet the preset operating condition criteria, monitoring the acceleration pedal opening rate and the acceleration pedal opening; When it is monitored that the acceleration pedal opening is greater than a preset opening and the forced downshift switch is triggered, determining whether the engine water temperature is less than a preset water temperature; When it is determined that the engine water temperature is not less than the preset water temperature, replacing the original torque relationship table with a gain torque relationship table. Both the gain torque relationship table and the original torque relationship table store the relationship between the acceleration pedal opening and the output torque of the motor. For the same acceleration pedal opening, the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table. Determining the output torque corresponding to the acceleration pedal opening from the gain torque relationship table; Controlling the input parameters of the motor so that the motor outputs the output torque; The method further includes: When it is determined that the engine water temperature is less than the preset water temperature, replacing the original torque relationship table with a maximum torque relationship table. For the same acceleration pedal opening, the corresponding output torque in the maximum torque relationship table is greater than the corresponding output torque in the gain torque relationship table. Determining the output torque corresponding to the acceleration pedal opening from the maximum torque relationship table.

2. The method according to claim 1, wherein The obtaining of the vehicle operating condition parameters and the determining of whether the operating condition parameters meet the preset operating condition criteria include: Obtaining the vehicle power mode, driving mode, and remaining battery charge; Determining whether the vehicle power mode is a hybrid mode, whether the driving mode is a sport mode, and whether the remaining battery charge is greater than a preset charge; When it is determined that all three conditions, namely, the vehicle power mode is a hybrid mode, the driving mode is a sport mode, and the remaining battery charge is greater than the preset charge, are met, it is determined that the operating condition parameters meet the preset operating condition criteria.

3. The method according to claim 1, characterized in that, After replacing the original torque relationship table with the gain torque relationship table and before determining the output torque corresponding to the acceleration pedal opening from the gain torque relationship table, the method further includes: Determining whether the vehicle is currently in a series hybrid mode; When it is determined that the vehicle is currently in the series hybrid mode, switching the vehicle to a parallel hybrid mode.

4. A plug-in hybrid vehicle acceleration control device, characterized in that, The device includes: A parameter judgment module configured to obtain vehicle operating condition parameters and determine whether the operating condition parameters meet preset operating condition criteria; A pedal monitoring module configured to monitor the acceleration pedal opening rate and the acceleration pedal opening when it is determined that the operating condition parameters meet the preset operating condition criteria; A relationship update module, configured to determine whether the engine water temperature is less than a preset water temperature when it is detected that the accelerator pedal opening is greater than a preset opening and the forced downshift switch is triggered, and when it is determined that the engine water temperature is not less than the preset water temperature, replace the original torque relationship table with a gain torque relationship table. Both the gain torque relationship table and the original torque relationship table store the relationship between the accelerator pedal opening and the output torque of the motor. For the same accelerator pedal opening, the corresponding output torque in the gain torque relationship table is greater than the corresponding output torque in the original torque relationship table; A torque determination module, configured to determine the output torque corresponding to the accelerator pedal opening from the gain torque relationship table; A motor control module, configured to control the input parameters of the motor so that the motor outputs the output torque, The relationship update module is further configured to: When it is determined that the engine water temperature is less than the preset water temperature, replace the original torque relationship table with a maximum torque relationship table. For the same accelerator pedal opening, the corresponding output torque in the maximum torque relationship table is greater than the corresponding output torque in the gain torque relationship table, The torque determination module is further configured to determine the output torque corresponding to the accelerator pedal opening from the maximum torque relationship table.

5. The device according to claim 4, characterized in that, The parameter judgment module includes: An acquisition sub-module, configured to acquire the vehicle power mode, driving mode, and remaining power; A judgment sub-module, configured to judge whether the vehicle power mode is a hybrid mode, whether the driving mode is a sport mode, and whether the remaining power is greater than a preset power; The judgment sub-module is further configured to, when it is determined that all three conditions that the vehicle power mode is a hybrid mode, the driving mode is a sport mode, and the remaining power is greater than the preset power are satisfied, judge that the working condition parameters meet the preset working condition requirements.

6. The device according to claim 4, characterized in that, The device further includes a mode control module: The mode control module is configured to judge whether the vehicle is currently in a series hybrid mode after replacing the original torque relationship table with the gain torque relationship table and before determining the output torque corresponding to the accelerator pedal opening from the gain torque relationship table; The mode control module is further configured to, when it is determined that the vehicle is currently in the series hybrid mode, switch the vehicle to a parallel hybrid mode.

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