A dual-clutch transmission heavy-load starting control method and system

Abstract

This invention provides a method and system for controlling high-load start-up of a dual-clutch transmission. The method includes: when vehicle start-up is detected, real-time detection of the vehicle's driving state is performed, and a determination is made based on the driving state whether the vehicle is currently in a high-load start-up condition; if so, real-time acquisition of the real-time operating parameters of the dual-clutch transmission and the real-time operating state of the brake pedal is performed, and a determination is made based on the real-time operating parameters and the real-time operating state whether the dual-clutch transmission has entered a dual-clutch start-up state. The dual-clutch transmission includes a first clutch and a second clutch; if so, corresponding transmission torque is allocated to the first clutch and the second clutch based on preset rules, and the transmission torque is transmitted to the wheel ends of the vehicle through the first clutch and the second clutch respectively. This invention can avoid clutch plate overheating and improve the performance of the transmission.

Description

Technical Field

[0001] This invention relates to the field of dual-clutch transmission technology, and in particular to a method and system for controlling high-load start-up of a dual-clutch transmission. Background Technology

[0002] With the advancement of technology and the rapid development of productivity, automobiles have become ubiquitous in people's daily lives and have become an indispensable means of transportation, greatly improving people's travel efficiency.

[0003] In the process of using existing fuel vehicles, there will be a high-load start-up condition. During this process, the target start-up speed of the automatic dual-clutch transmission is calculated by looking up a table based on the throttle opening value as an input variable. Therefore, for the dual-clutch transmission, a high-load start-up means a long time, high torque and high speed difference friction start-up. As a result, a lot of heat will be generated during the entire start-up process. Some of the heat will be carried away by the cooling oil, and the other part of the heat will remain in the clutch plate as temperature. This will cause the temperature of the clutch plate to rise rapidly, which will reduce the performance of the clutch or trigger thermal protection.

[0004] For dual-clutch transmissions operating under heavy load during start-up, most existing technologies improve the transmission's heat dissipation capacity by reducing the heat inside the clutch hardware or increasing the flow of cooling oil. However, these methods reduce the output torque transmitted from the transmission to the vehicle's wheels, thereby reducing the vehicle's acceleration performance and consequently lowering the user experience. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a method and system for controlling the high-load start-up of a dual-clutch transmission, so as to solve the technical problem of overheating of the clutch plates during the high-load start-up process of a dual-clutch transmission in the prior art.

[0006] The first aspect of the present invention proposes:

[0007] A method for controlling high-load start-up of a dual-clutch transmission, wherein the method includes:

[0008] When vehicle startup is detected, the driving status of the vehicle is monitored in real time, and it is determined whether the vehicle is currently in a high-load start-up condition based on the driving status.

[0009] If the vehicle is determined to be in a high-load start-up condition based on the driving status, the real-time operating parameters of the dual-clutch transmission and the real-time operating status of the brake pedal inside the vehicle are obtained in real time, and the dual-clutch transmission is determined to be in a dual-clutch start-up state based on the real-time operating parameters and the real-time operating status. The dual-clutch transmission includes a first clutch and a second clutch.

[0010] If the dual-clutch transmission is determined to have entered the dual-clutch start-up state based on the real-time operating parameters and the real-time operating status, then the first clutch and the second clutch are allocated corresponding transmission torques based on preset rules, and the transmission torques are transmitted to the wheel ends of the vehicle through the first clutch and the second clutch respectively.

[0011] The beneficial effects of this invention are as follows: By detecting the vehicle's driving status in real time, it is possible to determine whether the vehicle is currently in a high-load start-up condition. Furthermore, by acquiring the real-time operating parameters of the dual-clutch transmission and the real-time operating status of the brake pedal, it is possible to determine whether the dual-clutch transmission can enter a dual-clutch start-up state. Moreover, if so, the torque output by the engine can be transmitted to the first clutch and the second clutch through different transmission paths, thereby effectively preventing the heat generated by friction from concentrating on one clutch and thus effectively preventing the clutch plates from overheating. This improves the performance of the transmission and enhances the user experience.

[0012] Furthermore, the step of determining whether the vehicle is currently in a high-load start-up condition based on the driving status includes:

[0013] When the vehicle is detected to be moving forward, the vehicle speed is detected in real time, and the slope of the road on which the vehicle is currently traveling is calculated in real time based on the vehicle speed using a first preset algorithm.

[0014] Real-time determination of whether the angle corresponding to the slope is greater than a preset angle threshold;

[0015] If it is determined in real time that the angle corresponding to the slope is greater than the preset angle threshold, then it is determined that the vehicle is currently in the high-load start-up condition.

[0016] Alternatively, it can determine in real time whether the output torque of the vehicle's engine is greater than a preset torque threshold and whether the speed of the non-drive wheels is less than a preset speed threshold.

[0017] If it is determined in real time that the output torque of the vehicle's engine is greater than the preset torque threshold and the speed of the non-drive wheels is less than the preset speed threshold, then the vehicle is determined to be stuck in a ditch and enters the high-load start-up condition.

[0018] Furthermore, the expression for the first preset algorithm is:

[0019]

[0020] Where slope represents the gradient of the current location of the vehicle, dvel represents the actual acceleration of the vehicle, and G... vehicle The acceleration component of the vehicle in the direction of travel is represented by G, where G represents the conventional gravitational acceleration.

[0021] Furthermore, the step of determining whether the dual-clutch transmission has entered the dual-clutch start-up state based on the real-time operating parameters and the real-time operating status includes:

[0022] The transmission oil temperature, input shaft speed, clutch temperature and transmission gear position contained in the real-time operating parameters are extracted in real time, and the brake pedal is determined to be in braking state based on the real-time operating status.

[0023] If it is determined from the real-time working status that the brake pedal is not in the braking state, then it is determined in real time whether the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements;

[0024] If it is determined in real time that the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements, then the dual-clutch transmission is determined to have entered the dual-clutch start-up state.

[0025] Furthermore, the step of allocating corresponding transmission torques to the first clutch and the second clutch based on preset rules includes:

[0026] The engine output torque, torque deviation value, non-drive wheel speed, and first preset target torque limit value inside the vehicle are acquired in real time.

[0027] If the speed of the non-driving wheel is detected to be less than a preset speed threshold, the first target torque to be transmitted to the first clutch and the second target torque to be transmitted to the second clutch are calculated based on the output torque, the torque deviation value and the first preset target torque limit.

[0028] Furthermore, the step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch based on the output torque, the torque deviation value, and the first preset target torque limit includes:

[0029] The first target torque is calculated based on the engine output torque, torque deviation value, first preset target torque limit, and second preset algorithm. The expression for the second preset algorithm is as follows:

[0030] T clu1 =Min(T) engine -T error T lim )

[0031] Among them, T clu1 T represents the first target torque. engine T represents the output torque of the engine. err o r T represents the torque deviation value. lim This represents the first preset target torque limit.

[0032] Furthermore, the step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch based on the output torque, the torque deviation value, and the first preset target torque limit includes:

[0033] The second target torque is calculated based on the first target torque using a third preset algorithm. The expression for the third preset algorithm is as follows:

[0034] T clu2 =Max(0,T) engine -T error -T clu1 )

[0035] Among them, T clu1 T represents the first target torque. clu2 T represents the second target torque. engine T represents the output torque of the engine. error This indicates the torque deviation value.

[0036] The second aspect of the present invention proposes:

[0037] A dual-clutch transmission high-load start control system, wherein the system includes:

[0038] The detection module is used to detect the driving status of the vehicle in real time when the vehicle starts, and to determine whether the vehicle is currently in a high-load start-up condition based on the driving status.

[0039] The judgment module is used to determine whether the dual-clutch transmission has entered the dual-clutch start-up state if the vehicle is determined to be in the high-load start-up condition based on the driving state. The dual-clutch transmission includes a first clutch and a second clutch.

[0040] The execution module is configured to, if it is determined from the real-time operating parameters and the real-time operating status that the dual-clutch transmission has entered the dual-clutch start-up state, allocate corresponding transmission torque to the first clutch and the second clutch based on a preset rule, and transmit the transmission torque to the wheel ends of the vehicle through the first clutch and the second clutch respectively.

[0041] Furthermore, the detection module is specifically used for:

[0042] When the vehicle is detected to be moving forward, the vehicle speed is detected in real time, and the slope of the road on which the vehicle is currently traveling is calculated in real time based on the vehicle speed using a first preset algorithm.

[0043] Real-time determination of whether the angle corresponding to the slope is greater than a preset angle threshold;

[0044] If it is determined in real time that the angle corresponding to the slope is greater than the preset angle threshold, then it is determined that the vehicle is currently in the high-load start-up condition.

[0045] Alternatively, it can determine in real time whether the output torque of the vehicle's engine is greater than a preset torque threshold and whether the speed of the non-drive wheels is less than a preset speed threshold.

[0046] If it is determined in real time that the output torque of the vehicle's engine is greater than the preset torque threshold and the speed of the non-drive wheels is less than the preset speed threshold, then the vehicle is determined to be stuck in a ditch and enters the high-load start-up condition.

[0047] Furthermore, the expression for the first preset algorithm is:

[0048]

[0049] Where slope represents the gradient of the current location of the vehicle, dvel represents the actual acceleration of the vehicle, and G... vehicle The acceleration component of the vehicle in the direction of travel is represented by G, where G represents the conventional gravitational acceleration.

[0050] Furthermore, the determination module is specifically used for:

[0051] The transmission oil temperature, input shaft speed, clutch temperature and transmission gear position contained in the real-time operating parameters are extracted in real time, and the brake pedal is determined to be in braking state based on the real-time operating status.

[0052] If it is determined from the real-time working status that the brake pedal is not in the braking state, then it is determined in real time whether the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements;

[0053] If it is determined in real time that the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements, then the dual-clutch transmission is determined to have entered the dual-clutch start-up state.

[0054] Furthermore, the execution module is specifically used for:

[0055] The engine output torque, torque deviation value, non-drive wheel speed, and first preset target torque limit value inside the vehicle are acquired in real time.

[0056] If the speed of the non-driving wheel is detected to be less than a preset speed threshold, the first target torque to be transmitted to the first clutch and the second target torque to be transmitted to the second clutch are calculated based on the output torque, the torque deviation value and the first preset target torque limit.

[0057] Furthermore, the execution module is specifically used for:

[0058] The first target torque is calculated based on the engine output torque, torque deviation value, first preset target torque limit, and second preset algorithm. The expression for the second preset algorithm is as follows:

[0059] T clu1 =Min(T) engine -T error T lim )

[0060] Among them, T clu1 T represents the first target torque. engine T represents the output torque of the engine. err o r T represents the torque deviation value. lim This represents the first preset target torque limit.

[0061] Furthermore, the execution module is specifically used for:

[0062] The second target torque is calculated based on the first target torque using a third preset algorithm. The expression for the third preset algorithm is as follows:

[0063] T clu2 =Max(0,T) engine -T error -T clu1 )

[0064] Among them, T clu1 T represents the first target torque. clu2 T represents the second target torque. engine T represents the output torque of the engine. error This indicates the torque deviation value.

[0065] The third aspect of the present invention proposes:

[0066] A computer includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the dual-clutch transmission high-load start control method as described above.

[0067] The fourth aspect of the present invention proposes:

[0068] A readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the dual-clutch transmission high-load start control method as described above.

[0069] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0070] Figure 1 A flowchart of a high-load start-up control method for a dual-clutch transmission provided in the first embodiment of the present invention;

[0071] Figure 2 This is a schematic diagram of the high-load start-up condition in the dual-clutch transmission high-load start-up control method provided in the second embodiment of the present invention;

[0072] Figure 3 This is a schematic diagram of the structure of the dual-clutch transmission in the high-load start-up control method for dual-clutch transmissions provided in the fifth embodiment of the present invention;

[0073] Figure 4 The parameter diagram of the dual-clutch transmission when it has not entered the dual-clutch start-up state according to the first embodiment of the present invention;

[0074] Figure 5A parameter diagram of a dual-clutch transmission entering dual-clutch start-up state according to the first embodiment of the present invention;

[0075] Figure 6 This is a structural block diagram of the dual-clutch transmission high-load start control system provided in the sixth embodiment of the present invention.

[0076] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0077] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0078] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0080] Please see Figure 1 The image shows a high-load start control method for a dual-clutch transmission provided in the first embodiment of the present invention. The high-load start control method for a dual-clutch transmission provided in this embodiment can effectively avoid overheating of the clutch plates, thereby improving the performance of the transmission and enhancing the user experience.

[0081] Specifically, the dual-clutch transmission high-load start control method provided in this embodiment includes the following steps:

[0082] Step S10: When the vehicle is detected to start, the driving status of the vehicle is detected in real time, and it is determined whether the vehicle is currently in a high-load start-up condition based on the driving status.

[0083] Step S20: If it is determined from the driving state that the vehicle is currently in the high-load start-up condition, the real-time working parameters of the dual-clutch transmission inside the vehicle and the real-time working state of the brake pedal are obtained in real time, and it is determined from the real-time working parameters and the real-time working state whether the dual-clutch transmission has entered the dual-clutch start-up state. The dual-clutch transmission includes a first clutch and a second clutch.

[0084] Step S30: If it is determined that the dual-clutch transmission has entered the dual-clutch start-up state based on the real-time operating parameters and the real-time operating status, then the corresponding transmission torque is allocated to the first clutch and the second clutch based on the preset rules, and the transmission torque is transmitted to the wheel ends of the vehicle through the first clutch and the second clutch respectively.

[0085] Specifically, in this embodiment, it should first be noted that the dual-clutch transmission high-load start control method provided in this embodiment is specifically applied to vehicles equipped with dual-clutch transmissions under high-load conditions such as getting out of a ditch or climbing a hill, to prevent the clutch plates from overheating. Based on this, when the vehicle controller detects vehicle start-up in real time, it immediately detects the current vehicle's driving status, i.e., it acquires signals such as the vehicle speed, shift lever position, clutch temperature, and engine output torque in real time. Furthermore, it can determine in real time whether the vehicle is under high-load start-up conditions. Specifically, if so, it needs to further acquire the real-time operating parameters of the dual clutches and the real-time operating status of the brake pedal. Simultaneously, it can further determine whether the dual-clutch transmission inside the vehicle meets the requirements for entering the dual-clutch start-up state based on the current real-time operating parameters and real-time operating status.

[0086] Furthermore, if the vehicle controller determines that the dual-clutch transmission inside the vehicle meets the requirements for entering the dual-clutch start-up state, it can simultaneously activate the first clutch and the second clutch inside the current dual-clutch transmission, and immediately distribute the torque output by the engine to the first clutch and the second clutch according to the pre-set rules. Based on this, the torque output by the engine can be transmitted to the wheel end of the current vehicle through the first clutch and the second clutch.

[0087] Second Embodiment

[0088] Specifically, in this embodiment, it should be noted that the step of determining whether the vehicle is currently in a high-load start-up condition based on the driving state includes:

[0089] When the vehicle is detected to be moving forward, the vehicle speed is detected in real time, and the slope of the road on which the vehicle is currently traveling is calculated in real time based on the vehicle speed using a first preset algorithm.

[0090] Real-time determination of whether the angle corresponding to the slope is greater than a preset angle threshold;

[0091] If it is determined in real time that the angle corresponding to the slope is greater than the preset angle threshold, then it is determined that the vehicle is currently in the high-load start-up condition.

[0092] Alternatively, it can determine in real time whether the output torque of the vehicle's engine is greater than a preset torque threshold and whether the speed of the non-drive wheels is less than a preset speed threshold.

[0093] If it is determined in real time that the output torque of the vehicle's engine is greater than the preset torque threshold and the speed of the non-drive wheels is less than the preset speed threshold, then the vehicle is determined to be stuck in a ditch and enters the high-load start-up condition.

[0094] Specifically, in this embodiment, it should be noted that in order to accurately determine whether the current vehicle is in a high-load start-up condition, the current vehicle speed will be detected in real time. At the same time, the slope of the road on which the current vehicle is traveling can be calculated based on the current vehicle speed and the pre-set first preset algorithm. Meanwhile, it is determined in real time whether the angle corresponding to the current slope is greater than a preset angle threshold. Preferably, the current preset angle threshold can be 25 degrees or 40 degrees, etc.

[0095] Furthermore, if it is determined in real time that the angle corresponding to the current slope is greater than the aforementioned preset angle threshold, it can be accurately determined that the current vehicle is in the aforementioned high-load start-up condition.

[0096] Specifically, in this embodiment, it should also be noted that the expression of the first preset algorithm is as follows:

[0097]

[0098] Where slope represents the gradient of the current location of the vehicle, dvel represents the actual acceleration of the vehicle, and G... vehicle The acceleration component of the vehicle in the direction of travel is represented by G, where G represents the conventional gravitational acceleration.

[0099] Specifically, in this embodiment, it should also be noted that after obtaining the required vehicle speed through the above steps, the actual acceleration of the current vehicle and the acceleration component in the direction of travel can be further calculated. Based on this, the slope of the road on which the current vehicle is traveling can be calculated immediately according to the first preset algorithm.

[0100] Third Embodiment

[0101] Additionally, in this embodiment, it should be noted that the step of determining whether the dual-clutch transmission has entered the dual-clutch start-up state based on the real-time operating parameters and the real-time operating status includes:

[0102] The transmission oil temperature, input shaft speed, clutch temperature and transmission gear position contained in the real-time operating parameters are extracted in real time, and the brake pedal is determined to be in braking state based on the real-time operating status.

[0103] If it is determined from the real-time working status that the brake pedal is not in the braking state, then it is determined in real time whether the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements;

[0104] If it is determined in real time that the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements, then the dual-clutch transmission is determined to have entered the dual-clutch start-up state.

[0105] Furthermore, in this embodiment, it should be noted that after obtaining the required real-time operating parameters of the dual-clutch transmission through the above steps, parameters such as transmission oil temperature, input shaft speed, clutch temperature, and transmission gear position are further extracted from the current real-time operating parameters. Based on this, it is further determined whether the vehicle's brake pedal is in a braking state. Specifically, if not, it is necessary to further determine whether the aforementioned parameters of transmission oil temperature, input shaft speed, clutch temperature, and transmission gear position all meet preset requirements. More specifically, if yes, it can be directly determined that the current dual-clutch transmission can enter the aforementioned dual-clutch start-up state. Preferably, this embodiment will determine in real time whether the transmission oil temperature is higher than 110 degrees Celsius, whether the input shaft speed is greater than 450 rpm, whether the clutch temperature is higher than 130 degrees Celsius, and whether the transmission gear is in 2nd gear. Furthermore, the dual-clutch start-up state will only be entered if all four parameters simultaneously meet the preset requirements.

[0106] Fourth embodiment

[0107] Furthermore, in this embodiment, it should be noted that the step of allocating corresponding transmission torques to the first clutch and the second clutch based on preset rules includes:

[0108] The engine output torque, torque deviation value, non-drive wheel speed, and first preset target torque limit value inside the vehicle are acquired in real time.

[0109] If the speed of the non-driving wheel is detected to be less than a preset speed threshold, the first target torque to be transmitted to the first clutch and the second target torque to be transmitted to the second clutch are calculated based on the output torque, the torque deviation value and the first preset target torque limit.

[0110] In addition, in this embodiment, it should be noted that in order to reasonably distribute the corresponding transmission torque to the first clutch and the second clutch, the output torque, torque deviation value and the first preset target torque limit of the engine inside the vehicle will be obtained in real time. Based on this, the current output torque, torque deviation value and the first preset target torque limit can be input into the pre-set algorithm to calculate the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch, so as to facilitate subsequent processing.

[0111] Fifth embodiment

[0112] In this embodiment, it should be noted that the step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch based on the output torque, the torque deviation value, and the first preset target torque limit includes:

[0113] The first target torque is calculated based on the engine output torque, torque deviation value, first preset target torque limit, and second preset algorithm. The expression for the second preset algorithm is as follows:

[0114] T clu1 =Min(T) engine -T error T lim )

[0115] Among them, T clu1 T represents the first target torque. engine T represents the output torque of the engine. error T represents the torque deviation value. lim This represents the first preset target torque limit.

[0116] Furthermore, the first target torque can be calculated based on the real-time engine output torque, torque deviation value, first preset target torque limit, and pre-set second preset algorithm.

[0117] In this embodiment, it should be noted that the step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch based on the output torque, the torque deviation value, and the first preset target torque limit includes:

[0118] The second target torque is calculated based on the first target torque using a third preset algorithm. The expression for the third preset algorithm is as follows:

[0119] T clu2 =Max(0,T) engine -T error -T clu1 )

[0120] Among them, T clu1 T represents the first target torque. clu2 T represents the second target torque. engine T represents the output torque of the engine. error This indicates the torque deviation value.

[0121] In this embodiment, it should be noted that, similarly, after obtaining the first target torque through the above steps, the second target torque can be calculated immediately according to the third preset algorithm.

[0122] Furthermore, after obtaining the first target torque and the second target torque through the above steps, the torque transmitted to the wheel end will be calculated further using a fourth preset algorithm. Specifically, the expression for the fourth preset algorithm is as follows:

[0123] T wheel =T clu1 *I ratio1 +T clu2 *I ratio2

[0124] Among them, T wheel T represents the output torque at the wheel end. clu1 I represents the first target torque. ration1 T represents the first gear ratio. clu2 Indicates the second target torque, I ration This indicates the gear ratio for the second gear.

[0125] Please see Figure 4 The sixth embodiment of the present invention provides:

[0126] A dual-clutch transmission high-load start control system, wherein the system includes:

[0127] The detection module is used to detect the driving status of the vehicle in real time when the vehicle starts, and to determine whether the vehicle is currently in a high-load start-up condition based on the driving status.

[0128] The judgment module is used to determine whether the dual-clutch transmission has entered the dual-clutch start-up state if the vehicle is determined to be in the high-load start-up condition based on the driving state. The dual-clutch transmission includes a first clutch and a second clutch.

[0129] The execution module is configured to, if it is determined from the real-time operating parameters and the real-time operating status that the dual-clutch transmission has entered the dual-clutch start-up state, allocate corresponding transmission torque to the first clutch and the second clutch based on a preset rule, and transmit the transmission torque to the wheel ends of the vehicle through the first clutch and the second clutch respectively.

[0130] In the aforementioned dual-clutch transmission high-load start control system, the detection module is specifically used for:

[0131] When the vehicle is detected to be moving forward, the vehicle speed is detected in real time, and the slope of the road on which the vehicle is currently traveling is calculated in real time based on the vehicle speed using a first preset algorithm.

[0132] Real-time determination of whether the angle corresponding to the slope is greater than a preset angle threshold;

[0133] If it is determined in real time that the angle corresponding to the slope is greater than the preset angle threshold, then it is determined that the vehicle is currently in the high-load start-up condition.

[0134] Alternatively, it can determine in real time whether the output torque of the vehicle's engine is greater than a preset torque threshold and whether the speed of the non-drive wheels is less than a preset speed threshold.

[0135] If it is determined in real time that the output torque of the vehicle's engine is greater than the preset torque threshold and the speed of the non-drive wheels is less than the preset speed threshold, then the vehicle is determined to be stuck in a ditch and enters the high-load start-up condition.

[0136] In the aforementioned dual-clutch transmission high-load start control system, the expression for the first preset algorithm is:

[0137]

[0138] Where slope represents the gradient of the current location of the vehicle, dvel represents the actual acceleration of the vehicle, and G... vehicle The acceleration component of the vehicle in the direction of travel is represented by G, where G represents the conventional gravitational acceleration.

[0139] In the aforementioned dual-clutch transmission high-load start control system, the judgment module is specifically used for:

[0140] The transmission oil temperature, input shaft speed, clutch temperature and transmission gear position contained in the real-time operating parameters are extracted in real time, and the brake pedal is determined to be in braking state based on the real-time operating status.

[0141] If it is determined from the real-time working status that the brake pedal is not in the braking state, then it is determined in real time whether the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements;

[0142] If it is determined in real time that the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements, then the dual-clutch transmission is determined to have entered the dual-clutch start-up state.

[0143] In the aforementioned dual-clutch transmission high-load start control system, the execution module is specifically used for:

[0144] The engine output torque, torque deviation value, non-drive wheel speed, and first preset target torque limit value inside the vehicle are acquired in real time.

[0145] If the speed of the non-driving wheel is detected to be less than a preset speed threshold, the first target torque to be transmitted to the first clutch and the second target torque to be transmitted to the second clutch are calculated based on the output torque, the torque deviation value and the first preset target torque limit.

[0146] In the aforementioned dual-clutch transmission high-load start control system, the execution module is specifically used for:

[0147] The first target torque is calculated based on the engine output torque, torque deviation value, first preset target torque limit, and second preset algorithm. The expression for the second preset algorithm is as follows:

[0148] T clu1 =Min(T) engine -T error 'T lim )

[0149] Among them, T clu1 T represents the first target torque. engine T represents the output torque of the engine. err o r T represents the torque deviation value. lim This represents the first preset target torque limit.

[0150] In the aforementioned dual-clutch transmission high-load start control system, the execution module is further specifically used for:

[0151] The second target torque is calculated based on the first target torque using a third preset algorithm. The expression for the third preset algorithm is as follows:

[0152] T clu2 =Max(0,T) engine -T error -T clu1 )

[0153] Among them, T clu1 T represents the first target torque. clu2 T represents the second target torque. engine T represents the output torque of the engine. error This indicates the torque deviation value.

[0154] The seventh embodiment of the present invention provides a computer, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the dual-clutch transmission high-load start control method provided in the above embodiments.

[0155] The eighth embodiment of the present invention provides a readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, it implements the dual-clutch transmission high-load start control method provided in the above embodiments.

[0156] In summary, the dual-clutch transmission high-load start control method and system provided in the above embodiments of the present invention can effectively avoid overheating of the clutch plates, thereby improving the performance of the transmission and enhancing the user experience.

[0157] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside in the same processor; or the above modules can be located in different processors in any combination.

[0158] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0159] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0160] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0161] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0162] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for controlling high-load start-up of a dual-clutch transmission, characterized in that, The method includes: When vehicle startup is detected, the driving status of the vehicle is monitored in real time, and it is determined whether the vehicle is currently in a high-load start-up condition based on the driving status. If the vehicle is determined to be in a high-load start-up condition based on the driving status, the real-time operating parameters of the dual-clutch transmission and the real-time operating status of the brake pedal inside the vehicle are obtained in real time, and the dual-clutch transmission is determined to be in a dual-clutch start-up state based on the real-time operating parameters and the real-time operating status. The dual-clutch transmission includes a first clutch and a second clutch. If the dual-clutch transmission is determined to have entered the dual-clutch start-up state based on the real-time operating parameters and the real-time operating status, then the first clutch and the second clutch are allocated corresponding transmission torques based on preset rules, and the transmission torques are transmitted to the wheel ends of the vehicle through the first clutch and the second clutch respectively. The step of allocating corresponding transmission torques to the first clutch and the second clutch based on preset rules includes: The engine output torque, torque deviation value, non-drive wheel speed, and first preset target torque limit value inside the vehicle are acquired in real time. If the vehicle speed of the non-driving wheel is detected to be less than a preset vehicle speed threshold, the first target torque to be transmitted to the first clutch and the second target torque to be transmitted to the second clutch are calculated based on the output torque, the torque deviation value and the first preset target torque limit. The step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch based on the output torque, the torque deviation value, and the first preset target torque limit includes: The first target torque is calculated based on the engine output torque, torque deviation value, first preset target torque limit, and second preset algorithm. The expression for the second preset algorithm is as follows: Among them, T clu1 T represents the first target torque. engine T represents the output torque of the engine. error T represents the torque deviation value. lim This represents the first preset target torque limit.

2. The high-load start-up control method for a dual-clutch transmission according to claim 1, characterized in that: The step of determining whether the vehicle is currently in a high-load start-up condition based on the driving status includes: When the vehicle is detected to be moving forward, the vehicle speed is detected in real time, and the slope of the road on which the vehicle is currently traveling is calculated in real time based on the vehicle speed using a first preset algorithm. Real-time determination of whether the angle corresponding to the slope is greater than a preset angle threshold; If it is determined in real time that the angle corresponding to the slope is greater than the preset angle threshold, then it is determined that the vehicle is currently in the high-load start-up condition. Alternatively, it can determine in real time whether the output torque of the vehicle's engine is greater than a preset torque threshold and whether the speed of the non-drive wheels is less than a preset speed threshold. If it is determined in real time that the output torque of the vehicle's engine is greater than the preset torque threshold and the speed of the non-drive wheels is less than the preset speed threshold, then the vehicle is determined to be stuck in a ditch and enters the high-load start-up condition.

3. The high-load start-up control method for a dual-clutch transmission according to claim 2, characterized in that: The expression for the first preset algorithm is: Where slope represents the gradient of the current location of the vehicle, dvel represents the actual acceleration of the vehicle, and G... vehicle The acceleration component of the vehicle in the direction of travel is represented by G, where G represents the conventional gravitational acceleration.

4. The high-load start-up control method for a dual-clutch transmission according to claim 1, characterized in that: The step of determining whether the dual-clutch transmission has entered the dual-clutch start-up state based on the real-time operating parameters and the real-time operating status includes: The transmission oil temperature, input shaft speed, clutch temperature and transmission gear position contained in the real-time operating parameters are extracted in real time, and the brake pedal is determined to be in braking state based on the real-time operating status. If it is determined from the real-time working status that the brake pedal is not in the braking state, then it is determined in real time whether the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements; If it is determined in real time that the transmission oil temperature, the input shaft speed, the clutch temperature, and the transmission gear all meet the preset requirements, then the dual-clutch transmission is determined to have entered the dual-clutch start-up state.

5. The high-load start-up control method for a dual-clutch transmission according to claim 1, characterized in that: The step of calculating the first target torque transmitted to the first clutch and the second target torque transmitted to the second clutch based on the output torque, the torque deviation value, and the first preset target torque limit includes: The second target torque is calculated based on the first target torque using a third preset algorithm. The expression for the third preset algorithm is as follows: Among them, T clu1 T represents the first target torque. clu2 T represents the second target torque. engine T represents the output torque of the engine. error This indicates the torque deviation value.

6. A high-load start-up control system for a dual-clutch transmission, characterized in that, For implementing the dual-clutch transmission high-load start-up control method as described in any one of claims 1 to 5, the system comprises: The detection module is used to detect the driving status of the vehicle in real time when the vehicle starts, and to determine whether the vehicle is currently in a high-load start-up condition based on the driving status. The judgment module is used to determine whether the dual-clutch transmission has entered the dual-clutch start-up state if the vehicle is determined to be in the high-load start-up condition based on the driving state. The dual-clutch transmission includes a first clutch and a second clutch. The execution module is configured to, if it is determined from the real-time operating parameters and the real-time operating status that the dual-clutch transmission has entered the dual-clutch start-up state, allocate corresponding transmission torque to the first clutch and the second clutch based on a preset rule, and transmit the transmission torque to the wheel ends of the vehicle through the first clutch and the second clutch respectively.

7. A computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the dual-clutch transmission high-load start control method as described in any one of claims 1 to 5.

8. A readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the dual-clutch transmission high-load start control method as described in any one of claims 1 to 5.

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