A method of handling a gear shift process and related apparatus

Abstract

The application discloses a processing method and related device for gear shifting process, the method comprises the following steps: if it is detected that the traditional continuously variable transmission based on the empty gear switching forward gear, or, it is detected that the new continuously variable transmission based on the gear switching steel belt gear, firstly, the estimated in-place time of the steel belt clamping force is calculated through the current torque, the torque change rate and the protection torque; and the response time corresponding to the current oil temperature is determined as the estimated response time of the steel belt clamping force through the corresponding relationship between the oil temperature and the response time; then, the gear shifting demand time of the steel belt clamping force is determined through the estimated in-place time and the estimated response time; finally, the pressurization request for the steel belt clamping force is sent in advance by the gear shifting demand time. The method can realize the steel belt protection in advance in the gear shifting process; after realizing the steel belt protection, the clutch is pre-charged, the demand of the system instantaneous flow can be reduced, the system instantaneous flow shortage can be avoided, and the steel belt safety and the clutch interaction can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method and related apparatus for processing a gear shifting process. Background Technology

[0002] A continuously variable transmission (CVT) is a new type of power shift transmission that offers advantages such as driving comfort, low emissions, good fuel economy, and stepless shifting. By continuously changing the speed ratio, the CVT achieves a dynamic and optimal match between vehicle driving resistance and engine load, ensuring the engine always operates within its high-efficiency range.

[0003] In related technologies, during gear shifting processes such as shifting from neutral to forward gear based on traditional continuously variable transmissions (CVTs) or shifting from gear to belt gear based on new CVTs, it is necessary not only to increase the belt clamping force to protect the belt, but also to precharge the clutch to enable clutch interaction.

[0004] However, during the aforementioned gear shifting process, the increase in steel belt clamping force and the pre-charge clutch occur simultaneously. The system's instantaneous flow is insufficient, leading to a risk of steel belt slippage and poor clutch pre-charge effect, which seriously affects steel belt safety and clutch interaction. Summary of the Invention

[0005] In view of this, embodiments of this application provide a method and related apparatus for processing the gear shifting process. This method identifies in advance the time required to increase the clamping force of the steel belt during gear shifting, such as shifting from neutral to forward gear in a traditional continuously variable transmission (CVT) or from gear to steel belt in a novel CVT. It then sends a pressurization request for the steel belt clamping force in advance to achieve steel belt protection. Pre-charging the clutch after achieving steel belt protection reduces the system's instantaneous flow requirement, preventing insufficient instantaneous flow and thus improving steel belt safety and clutch interactivity.

[0006] On one hand, embodiments of this application provide a method for processing a gear shifting process, the method comprising:

[0007] If a shift from neutral to forward gear based on a conventional continuously variable transmission (CVT) is detected, or a shift from gear to belt gear based on a new type of CVT is detected, the estimated arrival time of the belt clamping force is determined based on the current torque, the rate of torque change, and the protection torque.

[0008] Based on the correspondence between oil temperature and response time, the response time corresponding to the current oil temperature is determined as the estimated response time of the steel strip clamping force;

[0009] Based on the estimated arrival time and the estimated response time, determine the shifting time required for the steel strip clamping force;

[0010] Send a pressurization request for the steel belt clamping force in advance of the shifting time requirement.

[0011] Optionally, the detection of shifting from neutral to forward gear based on a conventional continuously variable transmission (CVT) specifically includes:

[0012] The duty cycle change detected by the gear position sensor is the preset change amount.

[0013] Optionally, when the shift from gear to steel belt based on the novel continuously variable transmission is detected, sending a pressurization request for the steel belt clamping force in advance of the shift demand time includes:

[0014] The shift recognition speed is determined based on the shift speed of the gear shift to the steel belt shift, the rate of change of the speed, and the shift time requirement.

[0015] If the current vehicle speed is the same as the speed at which the gear shift is identified, a request to apply pressure to the steel belt clamping force is sent.

[0016] Optionally, determining the estimated arrival time of the steel strip clamping force based on the current torque, the rate of torque change, and the protection torque includes:

[0017] The torque change is determined based on the protection torque and the current torque;

[0018] The estimated arrival time is determined based on the amount of torque change and the rate of torque change.

[0019] Optionally, the step of determining the protection torque includes:

[0020] Based on the relationship between throttle opening and engine torque, the engine torque corresponding to the current throttle opening is determined as the first torque;

[0021] The second torque is determined based on the equivalent moment of inertia of the steel belt converted to the driving pulley and the equivalent angular acceleration of the driving pulley shaft.

[0022] If the first torque is greater than the second torque, the first torque is determined as the protection torque; if the first torque is less than or equal to the second torque, the second torque is determined as the protection torque.

[0023] Optionally, after sending the request to apply the steel belt clamping force in advance of the shift requirement time, the method further includes:

[0024] If the current state of the steel strip clamping force is in the "in position" state, send an interaction request for the clutch;

[0025] If the current state of the steel strip clamping force is not in the normal working condition, send an interaction request for the clutch after a preset delay.

[0026] If the current state of the steel strip clamping force is a poor working condition and not in place, pause sending interaction requests for the clutch.

[0027] Optionally, the method further includes:

[0028] During the interaction of the clutch, if the real-time impact load is less than or equal to the preset protection load, the steel belt is pressurized according to the preset protection load.

[0029] If the real-time impact load is greater than the preset protection load, the steel strip is pressurized according to the real-time impact load.

[0030] On the other hand, embodiments of this application provide a processing apparatus for a gear shifting process, the apparatus comprising: a determining unit and a sending unit;

[0031] The determining unit is used to determine the estimated arrival time of the steel belt clamping force based on the current torque, the torque change rate and the protection torque if it detects a shift from neutral to forward gear based on a conventional continuously variable transmission, or a shift from gear to steel belt based on a new type of continuously variable transmission.

[0032] The determining unit is further configured to determine the response time corresponding to the current oil temperature as the estimated response time of the steel strip clamping force based on the correspondence between oil temperature and response time.

[0033] The determining unit is further configured to determine the shifting time of the steel strip clamping force based on the estimated arrival time and the estimated response time.

[0034] The sending unit is used to send a pressurization request for the steel strip clamping force in advance of the shifting time requirement.

[0035] Optionally, the detection of shifting from neutral to forward gear based on a conventional continuously variable transmission (CVT) specifically includes:

[0036] The duty cycle change detected by the gear position sensor is the preset change amount.

[0037] Optionally, when the detection of a gear shifting steel belt shift based on a novel continuously variable transmission is achieved, the sending unit is specifically used for:

[0038] The shift recognition speed is determined based on the shift speed of the gear shift to the steel belt shift, the rate of change of the speed, and the shift time requirement.

[0039] If the current vehicle speed is the same as the speed at which the gear shift is identified, a request to apply pressure to the steel belt clamping force is sent.

[0040] Optionally, the determining unit is specifically used for:

[0041] The torque change is determined based on the protection torque and the current torque;

[0042] The estimated arrival time is determined based on the amount of torque change and the rate of torque change.

[0043] Optionally, the determining unit is further configured to:

[0044] Based on the relationship between throttle opening and engine torque, the engine torque corresponding to the current throttle opening is determined as the first torque;

[0045] The second torque is determined based on the equivalent moment of inertia of the steel belt converted to the driving pulley and the equivalent angular acceleration of the driving pulley shaft.

[0046] If the first torque is greater than the second torque, the first torque is determined as the protection torque; if the first torque is less than or equal to the second torque, the second torque is determined as the protection torque.

[0047] Optionally, the transmitting unit is further configured to;

[0048] If the current state of the steel strip clamping force is in the "in position" state, send an interaction request for the clutch;

[0049] If the current state of the steel strip clamping force is not in the normal working condition, send an interaction request for the clutch after a preset delay.

[0050] The device further includes: a pause unit;

[0051] The pause unit is used to pause sending interaction requests for the clutch if the current state of the steel strip clamping force is a poor working condition and not in place.

[0052] Optionally, the device further includes: a pressurization unit;

[0053] The pressurization unit is used for:

[0054] During the interaction of the clutch, if the real-time impact load is less than or equal to the preset protection load, the steel belt is pressurized according to the preset protection load.

[0055] If the real-time impact load is greater than the preset protection load, the steel strip is pressurized according to the real-time impact load.

[0056] On the other hand, embodiments of this application provide a vehicle, the vehicle including a processor and a memory:

[0057] The memory is used to store computer programs and to transfer the computer programs to the processor;

[0058] The processor is configured to execute the methods described above according to instructions in the computer program.

[0059] On the other hand, embodiments of this application provide a computer-readable storage medium for storing a computer program for implementing the methods described above.

[0060] Compared with the prior art, this application has at least the following advantages:

[0061] Using the technical solution of this application embodiment, if a shift from neutral to forward gear based on a traditional continuously variable transmission (CVT) or a shift from gear to belt gear based on a novel CVT is detected, firstly, the estimated arrival time of the belt clamping force is calculated based on the current torque, torque change rate, and protection torque; then, by querying the correspondence between oil temperature and response time, the response time corresponding to the current oil temperature is determined as the estimated response time of the belt clamping force; next, the shifting requirement time of the belt clamping force is determined based on the estimated arrival time and estimated response time; finally, a pressurization request for the belt clamping force is sent in advance of the shifting requirement time. It can be seen that this method can identify in advance the time required to increase the belt clamping force during shifting processes such as shifting from neutral to forward gear based on a traditional CVT or shifting from gear to belt gear based on a novel CVT, and send a pressurization request for the belt clamping force in advance to achieve belt protection in advance; after achieving belt protection, pre-charging the clutch can reduce the instantaneous flow requirement of the system, thereby avoiding insufficient instantaneous flow and improving belt safety and clutch interactivity. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 A schematic diagram of a transmission chain based on a traditional continuously variable transmission (CVT) is provided for related technologies.

[0064] Figure 2 A schematic diagram illustrating how to improve the steel belt clamping force and clutch pre-charge during the shifting process from neutral to forward gear in a traditional continuously variable transmission (CVT).

[0065] Figure 3A schematic diagram of a transmission chain based on a novel continuously variable transmission (CVT) is provided for related technologies.

[0066] Figure 4 A schematic diagram illustrating the improvement of steel belt clamping force and clutch pre-charge during gear shifting of a novel continuously variable transmission based on a gear-to-steel belt gear shift, for related technologies.

[0067] Figure 5 This is a schematic diagram of the system framework involved in an application scenario provided by an embodiment of this application;

[0068] Figure 6 A flowchart illustrating a gear shifting process provided in an embodiment of this application;

[0069] Figure 7 This is a schematic diagram illustrating how, when the duty cycle change of a gear position sensor in a conventional continuously variable transmission is a preset change, a request to apply pressure to the steel belt clamping force is sent in advance of the shifting time required by the steel belt clamping force, according to an embodiment of this application.

[0070] Figure 8 A schematic diagram illustrating the improvement of steel belt clamping force and clutch pre-charge during the shifting process from neutral to forward gear in a conventional continuously variable transmission (CVT) according to an embodiment of this application.

[0071] Figure 9 A schematic diagram illustrating the improvement of steel belt clamping force and clutch pre-charge during gear shifting of a novel continuously variable transmission based on a gear-to-steel belt gear shifting process, provided for embodiments of this application;

[0072] Figure 10 This is a schematic diagram of a gear shifting process processing device provided in an embodiment of this application. Detailed Implementation

[0073] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0074] See Figure 1The diagram illustrates a transmission chain diagram based on a traditional continuously variable transmission (CVT) provided by related technologies. The driven cylinder determines its pressure based on the torque transmitted by the steel belt and the actual speed ratio between the driving and driven pulleys to ensure safe torque transmission; that is, the driven cylinder is responsible for the steel belt clamping force. The driving cylinder determines its pressure based on the target speed ratio between the engine speed and the output speed of the variable resistor, as well as the oil pressure in the driven cylinder, to ensure that the actual speed ratio follows the target speed ratio; that is, the driving cylinder is responsible for speed ratio control. During the shift from neutral to forward gear, the clutch needs to be engaged. The output speed of the variable resistor connected to the engine quickly synchronizes with the speed of the driving pulley. The steel belt drive generates a large impact load, requiring not only increased steel belt clamping force for steel belt protection but also pre-charging the clutch to achieve clutch engagement.

[0075] See Figure 2 The diagram illustrates a method for increasing the steel belt clamping force and pre-charging the clutch during the shift from neutral to forward gear in a traditional continuously variable transmission (CVT). The method involves increasing the steel belt clamping force and pre-charging the clutch simultaneously. Insufficient instantaneous flow in the system leads to a drop in the actual pressure corresponding to the steel belt clamping force, resulting in a risk of steel belt slippage. Furthermore, significant pressure fluctuations during the clutch pre-charging phase negatively impact the clutch pre-charging effect.

[0076] See Figure 3 This diagram illustrates a transmission chain diagram based on a novel continuously variable transmission (CVT) provided by related technologies. Clutches C1 and C2 are responsible for switching the power flow of the transmission. When clutch C1 is engaged and clutch C2 is disengaged, power is transmitted through the gear set. When clutch C1 is disengaged and clutch C2 is engaged, power is transmitted through the steel belt. The driven cylinder determines its pressure based on the torque transmitted by the steel belt and the actual speed ratio between the driving pulley and the driven pulley, ensuring the steel belt can safely transmit torque; that is, the driven cylinder is responsible for the steel belt clamping force. The driving cylinder determines its pressure based on the target speed ratio between the engine speed and the output speed of the rheostat and the oil pressure of the driven cylinder, ensuring the actual speed ratio follows the target speed ratio; that is, the driving cylinder is responsible for speed ratio control. During the shifting process from gear to steel belt, clutch C1 needs to be disengaged and clutch C2 engaged. The output speed of the rheostat connected to the engine quickly synchronizes with the speed of the driving pulley. The steel belt transmission generates a large impact load, requiring not only increased steel belt clamping force for steel belt protection but also pre-charging of clutch C1 to achieve clutch interaction.

[0077] See Figure 4The diagram illustrates a method for increasing the steel belt clamping force and pre-charging the clutch during gear shifting in a novel continuously variable transmission (CVT) based on a steel belt. The method involves increasing the steel belt clamping force and pre-charging the clutch simultaneously. Insufficient instantaneous flow in the system leads to a drop in the actual pressure corresponding to the steel belt clamping force, resulting in a risk of steel belt slippage. Furthermore, significant pressure fluctuations during the clutch pre-charging phase negatively impact the clutch pre-charging effect.

[0078] That is, in the above-mentioned shifting process such as shifting from neutral to forward gear based on traditional continuously variable transmission (CVT) or shifting from gear gear to steel belt gear based on new CVT, the increase of steel belt clamping force and clutch pre-charging occur simultaneously. The system's instantaneous flow is insufficient, which leads to the risk of steel belt slippage and poor clutch pre-charging effect, seriously affecting steel belt safety and clutch interaction.

[0079] To address this issue, in this embodiment, the time required to increase the steel belt clamping force during gear shifting, such as shifting from neutral to forward gear in a traditional continuously variable transmission (CVT) or from gear to steel belt in a novel CVT, is identified in advance. A pressurization request for the steel belt clamping force is sent in advance to achieve steel belt protection. Pre-charging the clutch after steel belt protection reduces the system's instantaneous flow requirement, preventing insufficient instantaneous flow and thus improving steel belt safety and clutch interactivity.

[0080] For example, one scenario in the embodiments of this application can be applied to, such as Figure 5 The scenario shown includes a vehicle 500, which includes a processor 501. The processor 501 executes the implementation method provided in this application embodiment to achieve steel belt protection in advance. After achieving steel belt protection, the clutch is pre-charged, which can reduce the instantaneous flow requirement of the system, so as to avoid insufficient instantaneous flow of the system, thereby improving steel belt safety and clutch interactivity.

[0081] First, in the above application scenarios, although the action descriptions of the implementation methods provided in this application are executed by the processor 501, the implementation methods of this application are not limited in terms of the execution subject, as long as the actions disclosed in the implementation methods provided in this application are executed.

[0082] Secondly, the above scenario is only one example provided by the embodiments of this application, and the embodiments of this application are not limited to this scenario.

[0083] The following, in conjunction with the accompanying drawings, describes in detail the specific implementation of the gear shifting process processing method and related devices in the embodiments of this application.

[0084] First, an embodiment will be used to illustrate in detail the specific implementation of the gear shifting process method in this application.

[0085] See Figure 6 This diagram illustrates a flowchart of a gear-shifting process according to an embodiment of this application. In this embodiment, the method may include, for example, the following steps:

[0086] S601: If a shift from neutral to forward gear based on a conventional continuously variable transmission (CVT) is detected, or a shift from gear to belt gear based on a new type of CVT is detected, the estimated arrival time of the belt clamping force is determined based on the current torque, the rate of torque change, and the protection torque.

[0087] S602: Based on the relationship between oil temperature and response time, the response time corresponding to the current oil temperature is determined as the estimated response time of the steel strip clamping force.

[0088] In related technologies, during gear shifting processes such as switching from neutral to forward gears in traditional continuously variable transmissions (CVTs) or from gears to belt-driven gears in newer CVTs, it is necessary not only to increase the belt clamping force for belt protection but also to pre-charge the clutch to enable clutch interaction. However, in these gear shifting processes, increasing the belt clamping force and pre-charging the clutch occur simultaneously. Insufficient instantaneous flow in the system leads to a risk of belt slippage and poor clutch pre-charging, severely impacting belt safety and clutch interaction.

[0089] Therefore, in this embodiment, considering that waiting for the steel belt clamping force to increase to achieve steel belt protection before pre-charging the clutch to achieve clutch interaction can easily lead to slow power transmission and affect the vehicle's shifting performance, in order to ensure the vehicle's shifting performance without affecting steel belt safety, it is further considered that in shifting processes such as shifting from neutral to forward gear based on a traditional continuously variable transmission (CVT) or shifting from gear gear to steel belt gear based on a new type of CVT, increasing the steel belt clamping force to achieve the change from the current torque to the protective torque at the torque change rate requires a specific arrival time, and increasing the steel belt clamping force at the current oil temperature requires a specific response time; by increasing the steel belt clamping force in advance of this specific arrival time and this specific response time, steel belt protection can be achieved in advance; and by pre-charging the clutch after achieving steel belt protection, the instantaneous flow requirement of the system can be reduced to avoid insufficient instantaneous flow of the system, thereby improving steel belt safety and clutch interaction.

[0090] Based on this, when a shift from neutral to forward gear is detected based on a traditional continuously variable transmission (CVT), or a shift from gear to belt gear is detected based on a new type of CVT, the system pre-calculates the specific time required for the belt clamping force to change from the current torque to the protective torque using the current torque, torque change rate, and protective torque. This is the estimated time for the belt clamping force to reach its target position. Furthermore, by using the relationship between oil temperature and response time, the system queries the response time corresponding to the current oil temperature as the specific response time required to increase the belt clamping force at the current oil temperature. This is the estimated response time for the belt clamping force to reach its target position.

[0091] As an example, neutral gear in a conventional continuously variable transmission (CVT) is N, drive gear is D, and the current torque is T. current The protection torque is T protect If a shift from N to D gear based on a traditional continuously variable transmission (CVT) is detected, or a shift from a gear to a belt gear based on a new type of CVT is detected, according to T... current Torque change rate and T protect The estimated arrival time of the steel strip clamping force is determined as ∆t1; based on the correspondence between oil temperature and response time, the response time corresponding to the current oil temperature is determined as the estimated response time of the steel strip clamping force as ∆t2.

[0092] S603: Determine the shifting time of the steel strip clamping force based on the estimated arrival time and estimated response time.

[0093] In this embodiment of the application, after executing S601-S602 to calculate the estimated arrival time of the steel strip clamping force and query the estimated response time of the steel strip clamping force, the total time of the estimated arrival time and the estimated response time needs to be used as the time required to increase the steel strip clamping force, so as to increase the steel strip clamping force and realize the steel strip protection in advance; based on this, after executing S601-S602, it is also necessary to determine the shifting time of the steel strip clamping force through the estimated arrival time and the estimated response time.

[0094] As an example, based on the above example, the shifting time of the steel strip clamping force is determined to be ∆t according to the estimated arrival time ∆t1 and the estimated response time ∆t2, that is, ∆t=∆t1+∆t2.

[0095] S604: Sends a pressurization request for the steel belt clamping force during the advance shift time requirement.

[0096] In this embodiment, after executing S603 to determine the shifting time requirement for the steel belt clamping force, in order to ensure the vehicle's shifting performance without affecting the steel belt safety, it is necessary to increase the steel belt clamping force in advance of the shifting time requirement to achieve steel belt protection in advance. Based on this, after executing S603, a pressurization request for the steel belt clamping force is sent in advance of the shifting time requirement to increase the steel belt clamping force in advance, thereby achieving steel belt protection in advance. After achieving steel belt protection, the clutch is pre-charged, which can reduce the instantaneous flow requirement of the system, avoid insufficient instantaneous flow of the system, and thus improve steel belt safety and clutch interactivity.

[0097] As an example, based on the above example, a pressurization request for the steel strip clamping force is sent in advance of the shift demand time ∆t.

[0098] Through the various implementation methods provided in this embodiment, if a shift from neutral to forward gear based on a traditional continuously variable transmission (CVT) or a shift from gear to belt gear based on a novel CVT is detected, firstly, the estimated arrival time of the belt clamping force is calculated based on the current torque, torque change rate, and protection torque; then, by querying the correspondence between oil temperature and response time, the response time corresponding to the current oil temperature is determined as the estimated response time of the belt clamping force; next, the shifting requirement time of the belt clamping force is determined based on the estimated arrival time and estimated response time; finally, a pressurization request for the belt clamping force is sent in advance of the shifting requirement time. It can be seen that this method can identify in advance the time required to increase the belt clamping force during shifting processes such as shifting from neutral to forward gear based on a traditional CVT or shifting from gear to belt gear based on a novel CVT, and send a pressurization request for the belt clamping force in advance to achieve belt protection in advance; after achieving belt protection, pre-charging the clutch can reduce the instantaneous flow requirement of the system, thereby avoiding insufficient instantaneous flow and improving belt safety and clutch interactivity.

[0099] In the above embodiments, during gear shifting processes such as shifting from neutral to forward gear based on a traditional continuously variable transmission (CVT) or shifting from gear to belt gear based on a new type of CVT, it is necessary to increase the belt clamping force to achieve a protective torque that changes from the current torque at the rate of torque change. In order to further avoid the risk of belt slippage and improve the safety of the belt during the gear shifting process, the protective torque needs to be determined by querying the engine torque corresponding to the current throttle opening through the correspondence between throttle opening and engine torque, and by calculating the real-time inertial torque through the equivalent rotational inertia of the belt converted to the drive pulley and the equivalent angular acceleration of the drive pulley shaft. The maximum torque of the two torques is then used to determine the protective torque.

[0100] Based on this, firstly, the engine torque corresponding to the current throttle opening, obtained by querying the correspondence between throttle opening and engine torque, is used as the first torque. The real-time inertial torque, calculated by converting the equivalent moment of inertia of the steel belt to the drive pulley and the equivalent angular acceleration of the drive pulley shaft, is used as the second torque. Then, the maximum torque between the first and second torques is selected as the protection torque; that is, when the first torque is greater than the second torque, the first torque is determined as the protection torque; when the first torque is less than or equal to the second torque, the second torque is determined as the protection torque. Therefore, in an optional embodiment of this application, the step of determining the protection torque includes the following S1-S3 (not shown in the figure):

[0101] S1: Based on the relationship between throttle opening and engine torque, the engine torque corresponding to the current throttle opening is determined as the first torque.

[0102] S2: Determine the second torque based on the equivalent moment of inertia of the steel belt converted to the driving pulley and the equivalent angular acceleration of the driving pulley shaft.

[0103] S3: If the first torque is greater than the second torque, the first torque is determined as the protection torque; if the first torque is less than or equal to the second torque, the second torque is determined as the protection torque.

[0104] As an example, the equivalent moment of inertia of the steel belt converted to the drive pulley is J, and the equivalent angular acceleration of the drive pulley shaft is ω. Based on the above example, according to the correspondence between throttle opening and engine torque, the engine torque corresponding to the current throttle opening is determined as the first torque, that is, T. table Based on J and ω, the second torque is determined to be J·ω; according to T table And J·ω, determine the protection torque T protect For: T protect =max(T) table ,J·ω).

[0105] In the above embodiments, when determining the estimated arrival time of the steel strip clamping force based on the current torque, the torque change rate, and the protection torque in S601, since increasing the steel strip clamping force is actually achieved by changing the current torque to the protection torque through the estimated arrival time at the torque change rate, the torque change can be calculated first using the protection torque and the current torque, and then the estimated arrival time can be calculated using the torque change and the torque change rate. Therefore, in an optional embodiment of this application, the step of determining the estimated arrival time of the steel strip clamping force based on the current torque, the torque change rate, and the protection torque in S601 includes the following S6011-S6012 (not shown in the figure):

[0106] S6011: Determine the torque change based on the protection torque and the current torque.

[0107] S6012: Determine the estimated arrival time based on the amount and rate of torque change.

[0108] As an example, based on the above example, according to the protection torque T protect and current torque T current Determine the amount of torque change; based on the amount of torque change and the rate of torque change, determine the estimated arrival time ∆t1.

[0109] In the above embodiments, when detecting the shift from neutral to forward gear based on a conventional continuously variable transmission (CVT) in S601, the duty cycle change of the gear position sensor can be acquired in real time. Since the duty cycle change of the gear position sensor is a preset change, it indicates an intention to shift from neutral to forward gear. Therefore, detecting that the duty cycle change of the gear position sensor based on a conventional CVT is a preset change constitutes detecting the shift from neutral to forward gear based on a conventional CVT. That is, in an optional embodiment of this application, detecting the shift from neutral to forward gear based on a conventional CVT specifically means: detecting that the duty cycle change of the gear position sensor is a preset change.

[0110] As an example, based on the above example, if the duty cycle change of the gear position sensor based on the conventional continuously variable transmission is detected to be a preset change, then the N gear to D gear shift based on the conventional continuously variable transmission is detected.

[0111] See Figure 7 , Figure 7 This illustration shows a schematic diagram of how, when the duty cycle change of the gear position sensor based on a conventional continuously variable transmission (CVT) is a preset change, a request to apply pressure to the steel belt clamping force is sent ahead of the shifting demand time ∆t. Based on the above example, when the duty cycle change of the gear position sensor based on the conventional CVT is detected to be a preset change, that is, when the shift from N to D gear is detected based on the conventional CVT, a request to apply pressure to the steel belt clamping force is sent ahead of the shifting demand time ∆t.

[0112] In the above embodiments, considering that the gear shifting to the steel belt shifting mode based on the novel continuously variable transmission is actually determined by the change in the vehicle speed rate from the current vehicle speed to the steel belt shifting mode, and further considering that when the current vehicle speed reaches a specific speed, the change in the vehicle speed rate over the shifting time requirement is taken as the shifting speed, then in the specific implementation of S604, when the current vehicle speed reaches the specific speed, a pressurization request for the steel belt clamping force needs to be sent.

[0113] Based on this, firstly, by considering the shift speed, speed change rate, and shift demand time of the gear-to-belt transmission, a specific vehicle speed is calculated that the speed change rate changes over the shift demand time, i.e., the shift recognition speed. Then, when the current vehicle speed is the shift recognition speed, a pressurization request for the belt clamping force is sent to achieve the goal of sending the pressurization request for the belt clamping force ahead of the shift demand time. Therefore, in an optional embodiment of this application, when the gear-to-belt transmission shift based on the novel continuously variable transmission is detected, S604 includes the following S6041-S6042 (not shown in the figure):

[0114] S6041: Determine the shift recognition speed based on the shift speed, speed change rate, and shift time required when switching from gear to steel belt.

[0115] S6042: If the current vehicle speed is the speed at which the gear shift is identified, send a request to apply pressure to the steel belt clamping force.

[0116] As an example, the shift speed for switching from a geared gear to a belt-driven gear is V. shift The current vehicle speed is V current According to V shift Based on the vehicle speed change rate and ∆t, the shift recognition vehicle speed is determined to be V. identify If V current For V identify Send a request to apply pressure to the steel strip clamping force.

[0117] Furthermore, regarding the above embodiments, the current state of the steel belt clamping force can be determined by the vehicle's current operating condition and whether the steel belt clamping force is in place. Specifically, it can be divided into three states: clamping force in place, normal operating condition not in place, and adverse operating condition not in place. When the current state of the steel belt clamping force is in place, the clutch can be pre-charged normally to achieve normal clutch interaction. When the current state of the steel belt clamping force is normal operating condition not in place, a preset time needs to be delayed before pre-charging the clutch to achieve clutch interaction. When the current state of the steel belt clamping force is adverse operating condition not in place, it is necessary to wait for the steel belt clamping force to be in place, and in this case, it is necessary to pause sending interaction requests for the clutch to avoid the problem of steel belt slippage and poor clutch pre-charging effect caused by the simultaneous occurrence of increasing the steel belt clamping force and pre-charging the clutch. Therefore, in an optional embodiment of this application, after sending the steel belt clamping force pressurization request in advance of the shifting demand time, the method further includes the following S4, S5, or S6 (not shown in the figure):

[0118] S4: If the current state of the steel strip clamping force is in the "in position" state, send an interaction request for the clutch.

[0119] S5: If the current state of the steel belt clamping force is not in the normal working condition, send an interaction request for the clutch after a preset delay.

[0120] S6: If the current state of the steel belt clamping force is a poor working condition and not in place, suspend sending interaction requests for the clutch.

[0121] Among them, the failure to meet the requirements of severe working conditions includes the failure of the steel belt clamping force due to the activation of the Antilock Braking System (ABS) / Traction Control System (TCS), and the failure of the steel belt clamping force due to wheel slippage.

[0122] Furthermore, regarding the above embodiments, to further enhance the safety of the steel belt, the real-time impact load generated during clutch interaction can be further monitored. When the real-time impact load is less than or equal to a preset protection load, the steel belt is pressurized according to the preset protection value to further protect the steel belt; when the real-time impact load is greater than the preset protection load, the steel belt is pressurized according to the real-time impact load to further protect the steel belt. Therefore, in an optional embodiment of this application, the method further includes the following S7 or S8 (not shown in the figure):

[0123] S7: During the clutch interaction process, if the real-time impact load is less than or equal to the preset protection load, the steel belt is pressurized according to the preset protection load.

[0124] S8: If the real-time impact load is greater than the preset protection load, the steel strip is pressurized according to the real-time impact load.

[0125] As an example, see Figure 8 This illustration shows a schematic diagram of improving the steel belt clamping force and clutch pre-charge during the shift from neutral to forward gear in a conventional continuously variable transmission (CVT) according to an embodiment of this application. Based on the above example, when the shift from N to D gear in a conventional CVT is detected, a pressurization request for the steel belt clamping force is sent in advance by the shift requirement time ∆t. When the current state of the steel belt clamping force is in a state not yet in the normal operating condition, a preset time delay is required before pre-charging the clutch to achieve clutch interaction. When the current state of the steel belt clamping force is in the correct state, the clutch can be pre-charged normally to achieve normal clutch interaction. Because steel belt protection is implemented in advance, pre-charging the clutch after steel belt protection reduces the system's instantaneous flow requirement; that is, the system's instantaneous flow is sufficient, ensuring that not only is there no drop in the actual pressure corresponding to the steel belt clamping force, but the clutch pre-charging effect is also not affected. During clutch interaction, if the real-time impact load is less than or equal to the preset protection load, the steel belt is pressurized according to the preset protection load.

[0126] See Figure 9 This illustration shows a schematic diagram of improving the steel belt clamping force and clutch pre-charge during gear shifting to steel belt gear based on a novel continuously variable transmission (CVT) according to an embodiment of this application. Based on the above example, upon detecting gear shifting to steel belt gear based on the novel CVT, a pressurization request for the steel belt clamping force is sent ahead of the shifting time requirement ∆t. When the current state of the steel belt clamping force is in a state not yet in the normal operating condition, a preset time delay is required before pre-charging the clutch to achieve clutch interaction. When the current state of the steel belt clamping force is in the correct state, the clutch can be pre-charged normally to achieve normal clutch interaction. Because steel belt protection is implemented in advance, pre-charging the clutch after steel belt protection reduces the system's instantaneous flow requirement; that is, the system's instantaneous flow is sufficient, ensuring that not only is there no drop in the actual pressure corresponding to the steel belt clamping force, but the clutch pre-charging effect is also not affected. During clutch interaction, if the real-time impact load is greater than the preset protection load, the steel belt is pressurized according to the real-time impact load.

[0127] Next, another embodiment will be used to describe in detail the specific implementation of the gear shifting process in this application.

[0128] See Figure 10 This illustration shows a schematic diagram of a processing apparatus for a gear shifting process according to an embodiment of this application. In this embodiment, the apparatus may specifically include, for example, a determining unit 1001 and a sending unit 1002;

[0129] The determining unit 1001 is used to determine the estimated arrival time of the steel belt clamping force based on the current torque, the torque change rate and the protection torque if it detects a shift from neutral to forward gear based on a conventional continuously variable transmission, or a shift from gear to steel belt based on a new type of continuously variable transmission.

[0130] The determining unit 1001 is also used to determine the response time corresponding to the current oil temperature as the estimated response time of the steel strip clamping force based on the correspondence between oil temperature and response time.

[0131] The determining unit 1001 is also used to determine the shifting time of the steel strip clamping force based on the estimated arrival time and estimated response time.

[0132] The sending unit 1002 is used to send a pressurization request for the steel strip clamping force in advance of the gear shifting time requirement.

[0133] In one optional embodiment of this application, detecting a shift from neutral to forward gear based on a conventional continuously variable transmission (CVT) specifically involves:

[0134] The duty cycle change detected by the gear position sensor is the preset change amount.

[0135] In one optional embodiment of this application, when the gear shifting to the steel belt shifting mode based on the novel continuously variable transmission is detected, the sending unit 1002 is specifically used for:

[0136] The shift recognition speed is determined based on the shift speed, speed change rate, and shift time required when switching from gear to steel belt.

[0137] If the current vehicle speed is the speed at which gear shifting is identified, a request to apply pressure to the steel belt clamping force is sent.

[0138] In one optional embodiment of this application, the determining unit 1002 is specifically used for:

[0139] Determine the torque change based on the protection torque and the current torque;

[0140] The estimated arrival time is determined based on the amount and rate of torque change.

[0141] In one optional embodiment of this application, the determining unit 1002 is further configured to:

[0142] Based on the relationship between throttle opening and engine torque, the engine torque corresponding to the current throttle opening is determined as the first torque;

[0143] The second torque is determined based on the equivalent moment of inertia of the steel belt converted to the driving pulley and the equivalent angular acceleration of the driving pulley shaft.

[0144] If the first torque is greater than the second torque, the first torque is determined as the protection torque; if the first torque is less than or equal to the second torque, the second torque is determined as the protection torque.

[0145] In one optional embodiment of this application, the sending unit 1002 is further configured to;

[0146] If the current state of the steel strip clamping force is in the "in position" state, send an interaction request for the clutch;

[0147] If the current state of the steel strip clamping force is not in the normal working condition, send an interaction request for the clutch after a preset delay.

[0148] The device also includes: a pause unit;

[0149] The pause unit is used to pause sending interactive requests for the clutch if the current state of the steel strip clamping force is in a poor working condition and not in place.

[0150] In one optional embodiment of this application, the device further includes: a pressurization unit;

[0151] Pressurization unit, used for:

[0152] During the clutch interaction process, if the real-time impact load is less than or equal to the preset protection load, the steel belt is pressurized according to the preset protection load.

[0153] If the real-time impact load is greater than the preset protection load, the steel strip is pressurized according to the real-time impact load.

[0154] Through the various implementation methods provided in this embodiment, the gear shifting process processing device includes a determining unit and a sending unit. The determining unit detects a shift from neutral to forward gear based on a conventional continuously variable transmission (CVT), or a shift from gear to belt drive based on a novel CVT. It calculates the estimated arrival time of the belt clamping force based on the current torque, torque change rate, and protection torque. It then queries the response time corresponding to the current oil temperature using the correspondence between oil temperature and response time to determine the estimated response time of the belt clamping force. Based on the estimated arrival time and estimated response time, it determines the gear shifting requirement time for the belt clamping force. The sending unit sends a pressurization request for the belt clamping force in advance of the gear shifting requirement time. As can be seen, this device can identify in advance the time required to increase the clamping force of the steel belt during gear shifting, such as shifting from neutral to forward gear based on a traditional continuously variable transmission (CVT) or shifting from gear to steel belt gear based on a new type of CVT. It sends a pressurization request for the clamping force of the steel belt in advance to achieve steel belt protection. After the steel belt protection is achieved, the clutch is pre-charged, which can reduce the instantaneous flow requirement of the system and avoid insufficient instantaneous flow of the system, thereby improving steel belt safety and clutch interactivity.

[0155] Furthermore, this application also provides a vehicle, which includes a processor and a memory:

[0156] The memory is used to store computer programs and to transfer the computer programs to the processor;

[0157] The processor is configured to execute the methods described in the above embodiments according to instructions in the computer program.

[0158] This application also provides a computer-readable storage medium for storing a computer program that implements the methods described in the above embodiments.

[0159] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0160] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0161] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0162] The above description is merely a preferred embodiment of this application and is not intended to limit the application in any way. Although this application has disclosed preferred embodiments above, it is not intended to limit the application. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this application using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of this application. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solutions of this application shall still fall within the protection scope of the technical solutions of this application.

Claims

1. A method of handling a gear shift process, characterized by, The method comprises the steps of: If it is detected that the empty gear of the traditional continuously variable transmission is switched to the forward gear, or it is detected that the gear of the new continuously variable transmission is switched to the steel belt gear, the estimated reaching time of the steel belt clamping force is determined according to the current torque, the torque change rate and the protection torque; According to the corresponding relationship between the oil temperature and the response time, the response time corresponding to the current oil temperature is determined as the estimated response time of the steel belt clamping force; The shift demand time of the steel belt clamping force is determined according to the estimated reaching time and the estimated response time; The pressurization request for the steel belt clamping force is sent in advance of the shift demand time; The determination of the protection torque comprises the steps of: According to the corresponding relationship between the throttle opening and the engine torque, the engine torque corresponding to the current throttle opening is determined as the first torque; According to the equivalent rotational inertia of the steel belt converted to the driving pulley and the equivalent angular acceleration of the driving pulley shaft, the second torque is determined; If the first torque is greater than the second torque, the first torque is determined as the protection torque; if the first torque is less than or equal to the second torque, the second torque is determined as the protection torque.

2. The method of claim 1, wherein, The detection of the empty gear of the traditional continuously variable transmission being switched to the forward gear comprises the steps of: It is detected that the duty cycle change amount of the gear position sensor is a preset change amount.

3. The method of claim 1, wherein, When the gear of the new continuously variable transmission is switched to the steel belt gear, the pressurization request for the steel belt clamping force is sent in advance of the shift demand time, which comprises the steps of: According to the shift speed, the vehicle speed change rate and the shift demand time of the gear switched to the steel belt gear, the shift identification vehicle speed is determined; If the current vehicle speed is the shift identification vehicle speed, the pressurization request for the steel belt clamping force is sent.

4. The method of claim 1, wherein, The determination of the estimated reaching time of the steel belt clamping force according to the current torque, the torque change rate and the protection torque comprises the steps of: According to the protection torque and the current torque, the torque change amount is determined; According to the torque change amount and the torque change rate, the estimated reaching time is determined.

5. The method of claim 1, wherein, After the pressurization request for the steel belt clamping force is sent in advance of the shift demand time, the method further comprises the steps of: If the current state of the steel belt clamping force is the reaching state, the interaction request for the clutch is sent; If the current state of the steel belt clamping force is the normal working condition non-reaching state, the interaction request for the clutch is sent after being delayed for a preset time; If the current state of the steel belt clamping force is the severe working condition non-reaching state, the interaction request for the clutch is suspended.

6. The method of claim 5, wherein, The method further comprises the steps of: During the interaction of the clutch, if the real-time impact load is less than or equal to the preset protection load, the steel belt is pressurized according to the preset protection load; If the real-time impact load is greater than the preset protection load, the steel belt is pressurized according to the real-time impact load.

7. A processing device of a shift process, characterized by, The method comprises the steps of: A determination unit and a sending unit are provided; The determination unit is configured to determine the estimated reaching time of the steel belt clamping force according to the current torque, the torque change rate and the protection torque if it is detected that the empty gear of the traditional continuously variable transmission is switched to the forward gear, or it is detected that the gear of the new continuously variable transmission is switched to the steel belt gear. The determination unit is further configured to determine, according to a corresponding relationship between the oil temperature and the response time, the response time corresponding to the current oil temperature as the estimated response time of the steel belt clamping force; The determination unit is further configured to determine, according to the estimated arrival time and the estimated response time, a shift demand time of the steel belt clamping force; The sending unit is configured to send a pressurization request for the steel belt clamping force in advance of the shift demand time; The determination unit is further configured to: determine, according to a corresponding relationship between the throttle opening and the engine torque, the engine torque corresponding to the current throttle opening as a first torque; determine, according to the equivalent rotational inertia of the steel belt converted to the drive pulley and the equivalent angular acceleration of the drive pulley shaft, a second torque; if the first torque is greater than the second torque, determine the first torque as the protection torque; if the first torque is less than or equal to the second torque, determine the second torque as the protection torque.

8. A vehicle characterized by comprising: The vehicle comprises a processor and a memory: The memory is configured to store a computer program and transmit the computer program to the processor; The processor is configured to execute the method according to any one of claims 1-6 according to the instructions in the computer program.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium is configured to store a computer program, and the computer program is configured to implement the method according to any one of claims 1-6.

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