Motor torque adjusting method, device and equipment of hybrid electric vehicle and medium
By adjusting the motor torque to the optimal value at different speeds in hybrid vehicles, vibration and noise problems at engine start are solved, vibration isolation performance of the suspension system is improved, and demand for engine cabin space and cost is reduced.
Patent Information
- Application Number
- CN202510345154.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2025-05-23
AI Technical Summary
Hybrid cars have vibration and noise problems when starting the engine, and traditional methods increase rear suspension sleeve size or optimize rubber structure require more engine compartment space and increase costs.
By obtaining the vibration parameters and noise parameters of hybrid vehicles at different vehicle speeds and motor torque, these parameters are processed based on the multi-objective optimization model, the optimal motor torque at different vehicle speeds is determined, and when starting the engine in the running conditions, the motor torque is adjusted to the optimal motor torque corresponding to the current vehicle speed.
Improves vibration isolation performance of the suspension system, reduces vibration and noise during engine start-up, and eliminates the need to adjust the engine compartment space, reducing space and cost requirements.
Smart Images
Figure CN120024323A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of automobile control technology, and in particular to a method, device, equipment and medium for adjusting the motor torque of a hybrid vehicle. Background Art
[0002] When a hybrid vehicle is driving in pure electric mode, the engine needs to start to provide additional required power when the SOC (State of Charge) drops to a critical point or the battery provides insufficient driving power during acceleration. When driving downhill, when the battery is fully charged, or when the driving power required decreases, the engine will stop again. The engine of a hybrid vehicle starts and stops frequently, so for start-stop conditions, a non-sensing start control device is of great significance to the comfort of the vehicle.
[0003] When the vehicle accelerates in pure electric driving, the torque of the drive motor keeps changing. At this time, the X-direction force of the suspension system keeps changing, resulting in changes in the constraints and vibration isolation of the suspension system. The greater the torque of the drive motor, the greater the pressure on the rear suspension and the worse the vibration isolation. Traditional methods increase the vibration isolation of the suspension under pressure by increasing the size of the rear suspension rubber sleeve and optimizing the rubber structure, which requires a high space and cost in the engine compartment. Summary of the invention
[0004] The embodiments of the present application provide a method, device, equipment and medium for adjusting the motor torque of a hybrid vehicle, aiming to adjust the motor torque through a software strategy, improve the vibration isolation of the suspension system, and solve the vibration and noise when the engine is started.
[0005] In a first aspect, an embodiment of the present application provides a method for adjusting motor torque of a hybrid vehicle, comprising:
[0006] Obtaining vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques;
[0007] Processing the vibration parameters and the noise parameters based on a multi-objective optimization model to obtain performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques;
[0008] The optimal motor torque of the engine at different vehicle speeds is determined based on the performance parameters, so that when the engine is started under driving conditions, the motor torque is adjusted to the optimal motor torque corresponding to the current vehicle speed.
[0009] The embodiment of the present application establishes the optimal motor torque corresponding to different vehicle speeds in advance, so that when the engine is started under driving conditions, the motor torque is adjusted to the optimal motor torque corresponding to the current vehicle speed. The motor torque is adjusted through software strategies to improve the vibration isolation of the suspension system and solve the vibration and noise when the engine is started. There is no need to adjust the space of the engine compartment, which reduces the space and cost requirements for the engine compartment.
[0010] In a second aspect, an embodiment of the present application provides a motor torque adjustment device for a hybrid vehicle, comprising:
[0011] A parameter acquisition module, used to acquire vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques;
[0012] A performance parameter acquisition module, used for processing the vibration parameter and the noise parameter based on a multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques;
[0013] The torque determination module is used to determine the optimal motor torque of the engine at different vehicle speeds based on the performance parameters, so as to adjust the motor torque to the optimal motor torque corresponding to the current vehicle speed when the engine is started under driving conditions.
[0014] The embodiment of the present application establishes the optimal motor torque corresponding to different vehicle speeds in advance, so that when the engine is started under driving conditions, the motor torque is adjusted to the optimal motor torque corresponding to the current vehicle speed. The motor torque is adjusted through software strategies to improve the vibration isolation of the suspension system and solve the vibration and noise when the engine is started. There is no need to adjust the space of the engine compartment, which reduces the space and cost requirements for the engine compartment.
[0015] In a third aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, wherein
[0016] Memory, used to store computer programs;
[0017] The processor is used to execute the program stored in the memory to implement the motor torque adjustment method of the hybrid electric vehicle.
[0018] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the motor torque adjustment method of the hybrid vehicle described above is implemented. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a flow chart of a method for adjusting motor torque of a hybrid vehicle provided in an embodiment of the present application;
[0020] Figure 2 is a flow chart of a parameter acquisition method provided in an embodiment of the present application;
[0021] Figure 3 is a flow chart of a method for obtaining performance parameters provided in an embodiment of the present application;
[0022] Figure 4A flowchart of a method for determining an optimal motor torque provided in an embodiment of the present application;
[0023] Figure 5 is a flow chart of a motor torque adjustment method provided in an embodiment of the present application;
[0024] Figure 6 It is a structural schematic diagram of a hybrid vehicle engine non-sensing starting device provided in an embodiment of the present application;
[0025] Figure 7 It is a schematic diagram of a control process of an engine sensorless starting device provided in an embodiment of the present application;
[0026] Figure 8 It is a schematic diagram of an engine sensorless start parameter control process provided by an embodiment of the present application;
[0027] Fig. 9 A schematic diagram of the structure of a motor torque adjustment device for a hybrid vehicle provided in an embodiment of the present application;
[0028] Fig.10 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0030] Reference Figure 1 , shows a method for adjusting the motor torque of a hybrid vehicle provided by an embodiment of the present application, such as Figure 1 As shown, the motor torque adjustment method of the hybrid vehicle may include: step 110 , step 120 and step 130 .
[0031] Step 110: Obtain vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques.
[0032] In the embodiment of the present application, a hybrid vehicle is a vehicle that has two or more power sources and can be powered by a single drive system alone or together according to the actual driving state of the vehicle. In this example, the hybrid vehicle refers to a hybrid electric vehicle (HEV), which uses a traditional internal combustion engine (diesel engine or gasoline engine) and an electric motor as power sources.
[0033] When testing the optimal motor torque of a hybrid vehicle at different vehicle speeds, the vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques can be obtained. Specifically, the vehicle speed range and motor torque range of the hybrid vehicle engine at startup can be obtained in advance. The motor torque is adjusted to a different motor torque at each vehicle speed in the vehicle speed range to collect the vibration parameters and noise parameters at different motor torques at each vehicle speed. This implementation process will be combined with the following embodiments. Figure 2 A detailed description is given below and this embodiment will not be described in detail here.
[0034] After the vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques are acquired, step 120 is executed.
[0035] Step 120: Processing the vibration parameters and the noise parameters based on a multi-objective optimization model to obtain performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques.
[0036] Multi-objective optimization models play an important role in the performance optimization of hybrid vehicles. They can help business personnel find the optimal performance parameters under different vehicle speeds and motor torques, thereby improving the overall performance of the vehicle and the comfort of passengers.
[0037] After obtaining the vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques, the vibration parameters and noise parameters can be processed based on the multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques. Specifically, a multi-objective optimization model can be constructed using the vibration parameters and noise parameters. The model will include multiple objective functions, representing the minimization of vibration and noise respectively. The multi-objective optimization model is then used to solve a set of optimal solutions, which represent the optimal performance parameters of the hybrid vehicle. The processing process of the multi-objective optimization model will be combined with the following embodiments. Figure 3 A detailed description is given below and this embodiment will not be described in detail here.
[0038] After the vibration parameters and noise parameters are processed based on the multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques, step 130 is executed.
[0039] Step 130: Determine the optimal motor torque of the engine at different vehicle speeds based on the performance parameters, so as to adjust the motor torque to the optimal motor torque corresponding to the current vehicle speed when starting the engine under driving conditions.
[0040] After the vibration parameters and noise parameters are processed based on the multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques, the optimal motor torque of the engine at different vehicle speeds of the hybrid vehicle can be determined based on the performance parameters. Specifically, the minimum performance parameter corresponding to each vehicle speed can be obtained, and the motor torque corresponding to the minimum performance parameter is the optimal motor torque corresponding to the vehicle speed. Furthermore, when the vehicle is started in the driving condition, the motor torque is adjusted to the optimal motor torque corresponding to the current vehicle speed (i.e., the current vehicle speed of the hybrid vehicle).
[0041] The embodiment of the present application determines the optimal motor torque at different vehicle speeds through vibration parameters and noise parameters to adjust the motor torque. By adjusting the motor torque through software strategy, the vibration isolation of the suspension system can be improved, and the vibration and noise when the engine is started can be solved. At the same time, there is no need to adjust the space of the engine compartment, which reduces the space and cost requirements for the engine compartment.
[0042] Next, combine Figure 2 The process of obtaining vibration parameters and noise parameters is described in detail.
[0043] Reference Figure 2 , shows a flow chart of the steps of a parameter acquisition method provided by an embodiment of the present application. Figure 2 As shown, the parameter acquisition method may include: step 210 and step 220.
[0044] Step 210: Obtain the vehicle speed range of the engine of the hybrid vehicle when it is started, and the motor torque range of the engine.
[0045] In this embodiment, when the hybrid vehicle is driving or starting at a low speed, it will usually give priority to using electric drive to reduce emissions and improve fuel economy. When the vehicle speed increases to a certain range, the engine will start to provide additional power. This speed range varies depending on the vehicle model. Generally speaking, the engine of the hybrid vehicle will start when the vehicle speed reaches 30 to 40 kilometers per hour (or about 20 to 25 miles per hour). The specific value of the speed range can be determined according to actual conditions, and this embodiment does not limit this.
[0046] Motor torque is one of the important indicators of hybrid vehicle power performance. It determines the vehicle's power performance when starting, accelerating and climbing. The motor torque range of hybrid vehicles will also vary depending on the model and power system. Some high-performance hybrid vehicles may be equipped with high-torque motors to provide faster acceleration and stronger power output. Some models that focus more on fuel economy may use lower torque motors to reduce energy consumption and emissions. The specific value of the motor torque range can be determined according to actual conditions, and this embodiment does not limit this.
[0047] When testing the optimal motor torque at different vehicle speeds for a hybrid vehicle, the vehicle speed range of the engine of the hybrid vehicle when starting and the motor torque range of the engine can be obtained.
[0048] After the vehicle speed range and the motor torque range are acquired, step 220 is executed.
[0049] Step 220: For each vehicle speed within the vehicle speed range, obtain vibration parameters and noise parameters of the hybrid vehicle when the engine is within different motor torques within the motor torque range.
[0050] After obtaining the vehicle speed range and the motor torque range, the vibration parameters and noise parameters of the hybrid vehicle can be obtained for each vehicle speed within the vehicle speed range when the engine is within the motor torque range and at different motor torques. In practical applications, vibration and noise sensors are provided in the hybrid vehicle, and the vibration and noise sensors can collect vibration parameters and noise parameters, such as Figure 6 As shown, a hybrid vehicle 500 is provided with a powertrain 50 (i.e., a powertrain) and a vibration and noise sensor 51, and the vibration and noise sensor 51 can be used to detect vibration parameters and noise parameters. For example, the vehicle speed range is 30 to 50 km / h, and the motor torque range is 400 Nm to 500 Nm. The vehicle speeds selected in the vehicle speed range are: 30, 35, 40, 45, 50, and the motor torques selected in the motor torque range are: 400, 410, 420, ..., 500. At this time, the vibration parameters and noise parameters when the motor torque is 400, 410, 420, ..., 500 can be collected at a vehicle speed of 30 km / h. At a vehicle speed of 35 km / h, the vibration parameters and noise parameters when the motor torque is 400, 410, 420, ..., 500 can be collected. The vibration parameters and noise parameters are collected at vehicle speeds of 40, 45, and 50, respectively; the motor torque is collected at a vehicle speed of 30 kilometers per hour, and the motor torque is collected at 400, 410, 420, ..., 500, respectively.
[0051] It can be understood that the above examples are merely examples listed for a better understanding of the technical solutions of the embodiments of the present application, and are not intended to be the sole limitation to the embodiments.
[0052] In the embodiment of the present application, vibration parameters and noise parameters are one of the important indicators for measuring the performance of hybrid vehicles. The present application collects vibration parameters and noise parameters at different vehicle speeds and different motor torques for subsequent analysis of vehicle performance parameters, which can facilitate the acquisition of the optimal motor torque of the hybrid vehicle at different vehicle speeds and enhance the user's driving experience.
[0053] Next, combine Figure 3 The process of obtaining performance parameters is described in detail.
[0054] Reference Figure 3 , shows a flow chart of the steps of a method for obtaining performance parameters provided by an embodiment of the present application. Figure 3 As shown, the performance parameter acquisition method may include: step 310 and step 320.
[0055] Step 310: Obtain a first weight coefficient corresponding to the vibration parameter and a second weight coefficient corresponding to the noise parameter.
[0056] In this embodiment, the first weight coefficient and the second weight coefficient refer to weight coefficients pre-set for the vibration parameter and the noise parameter, respectively. In this example, the first weight coefficient and the second weight coefficient can be obtained by iteration based on empirical parameters, and the specific values of the first weight coefficient and the second weight coefficient can be determined according to business requirements, which is not limited in this embodiment.
[0057] When analyzing the performance parameters, the first weight coefficient corresponding to the vibration parameter and the second weight coefficient corresponding to the noise parameter can be obtained. In this example, the vibration parameters may include: the gearbox housing vibration parameters and the seat rail vibration parameters, and the first weight coefficient includes two weight coefficients, namely, the weight coefficients corresponding to the gearbox housing vibration parameters and the seat rail vibration parameters respectively. The noise parameters may include: the in-vehicle noise parameters and the out-vehicle noise parameters, and the second weight coefficient includes two weight coefficients, namely, the weight coefficients corresponding to the in-vehicle noise parameters and the out-vehicle noise parameters respectively.
[0058] After the first weight coefficient corresponding to the vibration parameter and the second weight coefficient corresponding to the noise parameter are acquired, step 320 is performed.
[0059] Step 320: Based on the first weight coefficient and the second weight coefficient, weighted sum is performed on the vibration parameter and the noise parameter to obtain performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques.
[0060] After obtaining the first weight coefficient corresponding to the vibration parameter and the second weight coefficient corresponding to the noise parameter, the vibration parameter and the noise parameter can be weighted and summed based on the first weight coefficient and the second weight coefficient to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques. Figure 6 As shown, an analysis module 52 is provided in the hybrid vehicle 500 , and the analysis module 52 can be used to process the collected vibration and noise signals, calculate and analyze data based on the model, and output a vehicle speed and a driving motor torque Map.
[0061] The embodiment of the present application determines the first weight coefficient and the second weight coefficient of the vibration parameter and the noise parameter, and performs weighted summation to obtain the comprehensive performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques. This method not only improves the accuracy of the evaluation, but also helps to optimize vehicle performance, enhance user experience and promote technological innovation.
[0062] Next, combine Figure 4 The process of determining the optimal motor torque is described in detail.
[0063] Reference Figure 4 , shows a flowchart of the steps of a method for determining an optimal motor torque provided by an embodiment of the present application. Figure 4 As shown, the optimal motor torque determination method may include: step 410 and step 420 .
[0064] Step 410: Obtain the minimum performance parameter among multiple performance parameters of the hybrid vehicle at different vehicle speeds.
[0065] In this embodiment, after the performance parameters of the hybrid vehicle under multiple motor torques at different vehicle speeds are obtained, the minimum performance parameter among the multiple performance parameters of the hybrid vehicle at different vehicle speeds may be obtained.
[0066] Step 420: Determine the motor torque corresponding to the minimum performance parameter as the optimal motor torque of the engine at different vehicle speeds.
[0067] After obtaining the minimum performance parameter among multiple performance parameters of the hybrid vehicle at different vehicle speeds, the motor torque corresponding to the minimum performance parameter can be determined as the optimal motor torque of the engine at different vehicle speeds. Figure 6 As shown, the analysis module in the hybrid vehicle 500 can analyze the vehicle speed and drive motor torque Map, that is, the optimal motor torque at different vehicle speeds.
[0068] The optimal motor torque can be determined by the following formulas (1) and (2):
[0069] Map(min X F(X))=min[f 1 (X),f 2 (X),…,f k (X)] (1)
[0070]
[0071] In the above formulas (1) and (2), V is the vehicle speed, T is the motor torque, and f k (X) is the performance parameter when the vehicle speed is V and the motor torque is T, Map (minX F(X)) is the minimum performance parameter, λ 1 is the weight coefficient corresponding to the vibration parameters of the gearbox housing, λ 2 is the weight coefficient corresponding to the vibration parameters of the seat rail, λ 3 is the weight coefficient corresponding to the interior noise parameter, λ 4 is the weight coefficient corresponding to the external noise parameter, a t (X) is the vibration parameter of the gearbox housing when the vehicle speed is V and the motor torque is T, a SR (X) is the vibration parameter of the seat rail when the vehicle speed is V and the motor torque is T, p oa (X) is the noise parameter inside the vehicle when the vehicle speed is V and the motor torque is T, p R (X) is the exterior noise parameter when the vehicle speed is V and the motor torque is T.
[0072] The embodiment of the present application searches for the motor torque value at the corresponding vehicle speed based on the identified minimum performance parameters. This torque value is the motor torque that can optimize the overall performance of the vehicle at the current vehicle speed. The motor torque is adjusted through software strategies to improve the vibration isolation of the suspension system without changing the hardware, thereby saving project development costs and shortening the project development cycle.
[0073] Next, combine Figure 5 The adjustment process of the motor torque is described in detail.
[0074] Reference Figure 5 , shows a flowchart of the steps of the motor torque adjustment method provided in the embodiment of the present application. Figure 5 As shown, the motor torque adjustment method may include: step 510 , step 520 and step 530 .
[0075] Step 510: When it is necessary to start the engine of the hybrid vehicle, the target vehicle speed of the hybrid vehicle at the current moment is obtained.
[0076] In this embodiment, when the engine of the hybrid vehicle needs to be started, the target vehicle speed of the hybrid vehicle at the current moment can be obtained. Specifically, the target vehicle speed at the current moment can be obtained through the vehicle dashboard.
[0077] After the target vehicle speed of the hybrid vehicle at the current moment is acquired, step 520 is executed.
[0078] Step 520: Obtain the target motor torque corresponding to the target vehicle speed.
[0079] After obtaining the target speed of the hybrid vehicle at the current moment, the target motor torque corresponding to the target speed can be obtained. Specifically, the optimal operating point can be determined according to the above formulas (1) and (2), and the optimal target motor torque corresponding to the target speed can be obtained.
[0080] After the target motor torque corresponding to the target vehicle speed is acquired, step 520 is executed.
[0081] Step 530: Adjust the motor torque to the target motor torque.
[0082] After obtaining the target motor torque corresponding to the target vehicle speed, the motor torque is adjusted to the target motor torque. Figure 6 As shown, a communication module 53 and a control module 54 are provided in the hybrid vehicle 500. The analysis module 52 can send the optimal target motor torque at the target vehicle speed to the control module 54 through the communication module 53. The control module 54 can control the engine to start at various vehicle speeds and drive motor torques.
[0083] The embodiment of the present application can improve the vibration isolation of the suspension system and solve the vibration and noise problems when the engine is started by adjusting the motor torque to the motor torque with optimal performance according to the vehicle speed of the hybrid vehicle.
[0084] Next, combine Figure 7 The control process of the engine sensorless starting device is described in detail.
[0085] Reference Figure 7 , which shows a schematic diagram of a control process of an engine non-sensing starting device provided in an embodiment of the present application. Figure 7 As shown, the process may include:
[0086] S100: Determine the vehicle speed range and motor torque range for engine startup. Specifically, the vehicle's driving state, mainly vehicle speed, drive motor torque information, etc., can be read to detect the vehicle speed range and motor torque range when the engine is started.
[0087] S200: Control the engine to start at various vehicle speeds and drive motor torques. Specifically, the engine can be started by a control module to control the vehicle to start the engine at various vehicle speeds and drive motor torques.
[0088] S300: Measure the vibration and noise at the time of engine startup. Specifically, the vibration parameter a of the gearbox housing after the engine is started can be measured. t (V, T), seat rail vibration parameter a SR (V, T), interior noise parameters p oa (V, T), vehicle exterior noise parameter p R (V,T).
[0089] S400: Establish an optimization model to find the motor torque with no sense of vibration at each vehicle speed. Specifically, the vehicle speed and motor torque points that meet the gearbox housing vibration and steering wheel vibration can be selected, and then a model is established based on multi-objective optimization to output the map point for starting without sense of vibration.
[0090] S500: Output Map 1 (V, T) to the control module. 1 (V,T) adjusts the motor torque at different vehicle speeds in a hybrid vehicle.
[0091] Next, combine Figure 8 The engine sensorless start parameter control process is described in detail.
[0092] Reference Figure 8 , shows a schematic diagram of an engine non-sensing start parameter control process provided by an embodiment of the present application. Figure 8 As shown, the process may include:
[0093] 1. Obtain the vehicle speed and motor torque range.
[0094] 2. Controller controls vehicle speed and motor torque Map 0 (V, T). That is, at each vehicle speed in the vehicle speed range, the motor torque is adjusted to the state of each motor torque in the motor torque range.
[0095] 3. Start the engine.
[0096] 4. Check whether the vibration of the gearbox housing is less than or equal to the target value. t (V,T) is the gearbox housing vibration acceleration (i.e., the gearbox housing vibration parameter in this example), A t is the gearbox housing vibration acceleration target value, detection a t (V,T)≤A t If the gearbox housing vibration acceleration is greater than the target value, readjust the vehicle speed and motor torque. If so, proceed to step 5.
[0097] 5. Check whether the vibration of the seat rail is less than or equal to the target value. SR (V,T) is the seat vibration acceleration (i.e., the seat rail vibration parameter in this example), A SR is the target value of seat vibration acceleration, in m / s 2 , detect a SR (V,T)≤A SR If the seat vibration acceleration is greater than the target value, readjust the vehicle speed and motor torque. If yes, proceed to step 6.
[0098] 6. Obtain the gearbox housing vibration parameters (i.e. gearbox housing vibration), seat rail vibration parameters (i.e. seat vibration), in-vehicle noise parameters (i.e. in-vehicle sound pressure value) and out-vehicle noise parameters (i.e. out-vehicle sound pressure value), and determine the sensorless start speed and motor torque point through these parameters. Specifically, a model can be established based on multi-objective optimization to determine the sensorless engine start Map point.
[0099] The embodiment of the present application can adaptively adjust the torque of the drive motor through the engine start-up senseless map point, effectively improve the vibration isolation of the suspension system, solve the vibration and noise problems when the engine starts, and improve the comfort of the hybrid vehicle. At the same time, this process does not require any changes to the hardware, and has obvious advantages in economy and periodicity.
[0100] Reference Fig. 9 , shows a schematic diagram of the structure of a motor torque adjustment device for a hybrid vehicle provided by an embodiment of the present application. Fig. 9 As shown, the motor torque adjustment device 900 of the hybrid vehicle may include the following modules:
[0101] A parameter acquisition module 910, for acquiring vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques;
[0102] A performance parameter acquisition module 920 is used to process the vibration parameter and the noise parameter based on a multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques;
[0103] The torque determination module 930 is used to determine the optimal motor torque of the engine at different vehicle speeds based on the performance parameters, so as to adjust the motor torque to the optimal motor torque corresponding to the current vehicle speed when the engine is started under driving conditions.
[0104] Optionally, the parameter acquisition module includes:
[0105] A range acquisition unit, used to acquire a vehicle speed range of the engine of the hybrid vehicle when starting, and a motor torque range of the engine;
[0106] The parameter acquisition unit is used to acquire, for each vehicle speed within the vehicle speed range, vibration parameters and noise parameters of the hybrid vehicle when the engine is within the motor torque range at different motor torques.
[0107] Optionally, the performance parameter acquisition module includes:
[0108] A weight coefficient acquisition unit, used to acquire a first weight coefficient corresponding to the vibration parameter and a second weight coefficient corresponding to the noise parameter;
[0109] The performance parameter acquisition unit is used to perform weighted summation on the vibration parameter and the noise parameter based on the first weight coefficient and the second weight coefficient to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques.
[0110] Optionally, the torque determination module comprises:
[0111] A minimum parameter acquisition unit, used to acquire the minimum performance parameter among a plurality of performance parameters of the hybrid vehicle at different vehicle speeds;
[0112] The optimal torque determination unit is used to determine the motor torque corresponding to the minimum performance parameter as the optimal motor torque of the engine at different vehicle speeds.
[0113] Optionally, the vibration parameters include: transmission housing vibration parameters and seat rail vibration parameters, and the noise parameters include: in-vehicle noise parameters and out-vehicle noise parameters.
[0114] Optionally, the optimal torque determination unit comprises:
[0115] The performance parameters are calculated based on the following formulas (1) and (2):
[0116] Map(min X F(X))=min[f 1 (X),f 2 (X),…,f k (X)] (1)
[0117]
[0118] In the above formulas (1) and (2), V is the vehicle speed, T is the motor torque, and f k (X) is the performance parameter when the vehicle speed is V and the motor torque is T, Map (min X F(X)) is the minimum performance parameter, λ 1 is the weight coefficient corresponding to the vibration parameters of the gearbox housing, λ 2 is the weight coefficient corresponding to the vibration parameters of the seat rail, λ 3 is the weight coefficient corresponding to the interior noise parameter, λ 4 is the weight coefficient corresponding to the external noise parameter, a t (X) is the vibration parameter of the gearbox housing when the vehicle speed is V and the motor torque is T, a SR (X) is the vibration parameter of the seat rail when the vehicle speed is V and the motor torque is T, p oa (X) is the noise parameter inside the vehicle when the vehicle speed is V and the motor torque is T, p R(X) is the exterior noise parameter when the vehicle speed is V and the motor torque is T.
[0119] Optionally, the device further comprises:
[0120] A vehicle speed acquisition module, used for acquiring a target vehicle speed of the hybrid vehicle at a current moment when the engine of the hybrid vehicle needs to be started;
[0121] A torque acquisition module, used to acquire a target motor torque corresponding to the target vehicle speed;
[0122] The torque adjustment module is used to adjust the motor torque to the target motor torque.
[0123] The motor torque adjustment device for a hybrid vehicle provided in an embodiment of the present application obtains the vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques. The vibration parameters and noise parameters are processed based on a multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques. According to the performance parameters, the optimal motor torque of the engine at different vehicle speeds is determined, so that when the engine is started under driving conditions, the motor torque is adjusted to the optimal motor torque corresponding to the current vehicle speed. The embodiment of the present application determines the optimal motor torque at different vehicle speeds through vibration parameters and noise parameters to adjust the motor torque. By adjusting the motor torque through software strategies, the vibration isolation of the suspension system can be improved, and the vibration and noise when the engine is started can be solved. At the same time, there is no need to adjust the space of the engine compartment, which reduces the space and cost requirements for the engine compartment.
[0124] The present application also provides an electronic device 1000. Fig.10 , including a processor 1010 and a memory 1020, wherein the memory 1010 is used to store computer programs; the processor 1020 is used to execute the programs stored in the memory 1010 to implement the motor torque adjustment method of the hybrid vehicle introduced in any embodiment of the present application.
[0125] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the motor torque adjustment method for a hybrid vehicle introduced in any embodiment of the present application is implemented.
[0126] It should be noted that the computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, a device or a device or used in combination with it. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as a part of a carrier wave, wherein a computer-readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.
[0127] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.
[0128] The flowchart and block diagram in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.
[0129] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. 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 knowledge or customary technical means in the art that are not disclosed in the present application.
[0130] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.
Claims
1. A method for adjusting the motor torque of a hybrid vehicle, characterized in that: include: Obtaining vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques; Processing the vibration parameters and the noise parameters based on a multi-objective optimization model to obtain performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques; The optimal motor torque of the engine at different vehicle speeds is determined based on the performance parameters, so that when the engine is started under driving conditions, the motor torque is adjusted to the optimal motor torque corresponding to the current vehicle speed.
2. The method according to claim 1, characterized in that The step of obtaining vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and motor torques includes: Obtaining a vehicle speed range of the engine of the hybrid vehicle when starting, and a motor torque range of the engine; For each vehicle speed within the vehicle speed range, vibration parameters and noise parameters of the hybrid vehicle are obtained when the engine is within different motor torques within the motor torque range.
3. The method according to claim 1, characterized in that The vibration parameters and the noise parameters are processed based on the multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques, including: Obtaining a first weight coefficient corresponding to the vibration parameter and a second weight coefficient corresponding to the noise parameter; Based on the first weight coefficient and the second weight coefficient, the vibration parameter and the noise parameter are weightedly summed to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques.
4. The method according to claim 1, characterized in that Determining the optimal motor torque of the engine at different vehicle speeds according to the performance parameter includes: Obtaining a minimum performance parameter among a plurality of performance parameters of the hybrid vehicle at different vehicle speeds; The motor torque corresponding to the minimum performance parameter is determined as the optimal motor torque of the engine at different vehicle speeds.
5. The method according to claim 4, characterized in that The vibration parameters include: transmission housing vibration parameters and seat rail vibration parameters, and the noise parameters include: in-vehicle noise parameters and out-vehicle noise parameters.
6. The method according to claim 5, characterized in that The step of determining the motor torque corresponding to the minimum performance parameter as the optimal motor torque of the engine at different vehicle speeds includes: The performance parameters are calculated based on the following formulas (1) and (2): Map(min X F(X))=min[f1(X),f2(X),…,f k (X)] (1) In the above formulas (1) and (2), V is the vehicle speed, T is the motor torque, and f k (X) is the performance parameter when the vehicle speed is V and the motor torque is T, Map (min X F(X)) is the minimum performance parameter, λ1 is the weight coefficient corresponding to the gearbox housing vibration parameter, λ2 is the weight coefficient corresponding to the seat rail vibration parameter, λ3 is the weight coefficient corresponding to the interior noise parameter, λ4 is the weight coefficient corresponding to the exterior noise parameter, and a t (X) is the vibration parameter of the gearbox housing when the vehicle speed is V and the motor torque is T, a SR (X) is the vibration parameter of the seat rail when the vehicle speed is V and the motor torque is T, p oa (X) is the noise parameter inside the vehicle when the vehicle speed is V and the motor torque is T, p R (X) is the exterior noise parameter when the vehicle speed is V and the motor torque is T.
7. The method according to claim 1, characterized in that After determining the optimal motor torque of the engine at different vehicle speeds according to the performance parameter, the method further includes: When it is necessary to start the engine of the hybrid vehicle, obtaining a target vehicle speed of the hybrid vehicle at the current moment; Obtaining a target motor torque corresponding to the target vehicle speed; The motor torque is adjusted to the target motor torque.
8. A motor torque adjustment device for a hybrid vehicle, characterized in that: include: A parameter acquisition module, used to acquire vibration parameters and noise parameters of the hybrid vehicle at different vehicle speeds and different motor torques; A performance parameter acquisition module, used for processing the vibration parameter and the noise parameter based on a multi-objective optimization model to obtain the performance parameters of the hybrid vehicle at different vehicle speeds and different motor torques; The torque determination module is used to determine the optimal motor torque of the engine at different vehicle speeds according to the performance parameters, so as to adjust the motor torque to the optimal motor torque corresponding to the current vehicle speed when the engine is started under driving conditions.
9. An electronic device, characterized in that: comprising a processor and a memory, wherein Memory, used to store computer programs; A processor, used to execute a program stored in a memory to implement the method described in 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 by a processor, the method according to any one of claims 1 to 7 is implemented.