Processing method of gear shifting process and related device

Abstract

The invention discloses a gear shifting process processing method and related device.The method comprises the steps that if it is detected that a neutral gear is switched to a forward gear based on a traditional continuously variable transmission or it is detected that a gear gear is switched to a steel belt gear based on a novel continuously variable transmission, firstly, through the current torque, the torque change rate and the protection torque, the gear shifting speed is changed to the forward gear; calculating the estimated in-place time of the clamping force of the steel strip; the response time corresponding to the current oil temperature is inquired according to the corresponding relation between the oil temperature and the response time, and the response time is determined as the estimated response time of the clamping force of the steel belt; then, through the pre-estimated in-place time and the pre-estimated response time, the gear shifting demand time of the steel belt clamping force is determined; and finally, a pressurization request for the clamping force of the steel strip is sent in advance of the gear shifting demand time. According to the method, steel belt protection is achieved in advance in the gear shifting process; the clutch is pre-charged after steel belt protection is achieved, the requirement for the instantaneous flow of the system can be lowered, the situation that the instantaneous flow of the system is insufficient is avoided, and the safety of the steel belt and the interactivity of the clutch are improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method for processing a gear shifting process and a related device. Background Art

[0002] The CVT is a new type of power shift transmission with the advantages of comfortable driving, low emissions, good fuel economy, and stepless shifting. The CVT achieves the best dynamic match between the vehicle's driving resistance and the engine load through the continuous change of the speed ratio, and always keeps the engine running in the high-efficiency zone.

[0003] In the related technology, during the gear shifting process such as switching from neutral to forward gear based on a traditional continuously variable transmission or switching from gear to steel belt gear based on a new continuously variable transmission, it is necessary not only to increase the clamping force of the steel belt to achieve steel belt protection, but also to pre-charge the clutch to achieve clutch interaction.

[0004] However, in the above-mentioned shifting process, increasing the clamping force of the steel belt and pre-filling the clutch occur simultaneously. The system's instantaneous flow is insufficient, resulting in the risk of the steel belt slipping and poor clutch pre-filling effect, which seriously affects the safety of the steel belt and the interaction of the clutch. Summary of the invention

[0005] In view of this, the embodiments of the present application provide a method and related device for processing a gear shifting process, which identifies in advance the time required to increase the steel belt clamping force during the gear shifting process such as switching from neutral to forward gear based on a traditional continuously variable transmission or switching from gear to steel belt gear based on a new continuously variable transmission, and sends a pressurization request for the steel belt clamping force in advance of the required time so as to achieve steel belt protection in advance; pre-filling the clutch after achieving steel belt protection can reduce the system's instantaneous flow demand to avoid insufficient instantaneous flow of the system, thereby improving the safety of the steel belt and the interactivity of the clutch.

[0006] On the one hand, an embodiment of the present application provides a method for processing a gear shift process, the method comprising:

[0007] If it is detected that the forward gear is switched from the neutral gear of the conventional continuously variable transmission, or it is detected that the steel belt gear is switched from the gear gear of the new continuously variable transmission, the estimated time for the steel belt clamping force to be in place is determined according to the current torque, the torque change rate and the protection torque;

[0008] 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;

[0009] Determine the shifting requirement time of the steel belt clamping force according to the estimated arrival time and the estimated response time;

[0010] A pressurization request for the clamping force of the steel belt is sent in advance of the shift demand time.

[0011] Optionally, the detection of switching forward gear from neutral to forward gear based on a conventional continuously variable transmission is specifically as follows:

[0012] It is detected that the duty cycle change of the gear position sensor is a preset change.

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

[0014] Determining a gear shift recognition vehicle speed according to the gear shift vehicle speed, vehicle speed change rate and the gear shift requirement time when the gear gear is switched to the steel belt gear;

[0015] If the current vehicle speed is the gear shift recognition vehicle speed, a pressurization request for the steel belt clamping force is sent.

[0016] Optionally, determining the estimated time for the steel belt clamping force to be in place according to the current torque, the torque protection rate and the protection torque includes:

[0017] Determining a torque change according to the protection torque and the current torque;

[0018] The estimated arrival time is determined according to the torque change amount and the torque change rate.

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

[0020] 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;

[0021] Determine the second torque according to 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 pressurization request for the steel belt clamping force in advance of the shifting requirement time, the method further includes:

[0024] If the current state of the steel belt clamping force is in place, sending an interaction request for the clutch;

[0025] If the current state of the steel belt clamping force is a state not in place under normal working conditions, delaying a preset time to send an interaction request for the clutch;

[0026] If the current state of the steel belt clamping force is a severe working condition state, the sending of the interaction request for the clutch is suspended.

[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, pressurizing the steel belt 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, an embodiment of the present application provides a device for processing a gear shift process, the device comprising: a determining unit and a sending unit;

[0031] The determination unit is used to determine the estimated arrival time of the steel belt clamping force according to the current torque, the torque protection rate and the protection torque if it detects that the neutral gear based on the conventional continuously variable transmission is switched to the forward gear, or if it detects that the gear gear based on the novel continuously variable transmission is switched to the steel belt gear;

[0032] The determination unit is further configured to determine the response time corresponding to the current oil temperature as the estimated response time of the steel belt clamping force according to the corresponding relationship between the oil temperature and the response time;

[0033] The determination unit is further used to determine the shifting requirement time of the steel belt clamping force according to the estimated arrival time and the estimated response time;

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

[0035] Optionally, the detection of switching forward gear from neutral to forward gear based on a conventional continuously variable transmission is specifically as follows:

[0036] It is detected that the duty cycle change of the gear position sensor is a preset change.

[0037] Optionally, when the gear shift of the novel continuously variable transmission to the steel belt gear is detected, the sending unit is specifically used to:

[0038] Determining a gear shift recognition vehicle speed according to the gear shift vehicle speed, vehicle speed change rate and the gear shift requirement time when the gear gear is switched to the steel belt gear;

[0039] If the current vehicle speed is the gear shift recognition vehicle speed, a pressurization request for the steel belt clamping force is sent.

[0040] Optionally, the determining unit is specifically configured to:

[0041] Determining a torque change according to the protection torque and the current torque;

[0042] The estimated arrival time is determined according to the torque change amount and the torque change rate.

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

[0044] 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;

[0045] Determine the second torque according to 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 sending unit is further used for:

[0048] If the current state of the steel belt clamping force is in place, sending an interaction request for the clutch;

[0049] If the current state of the steel belt clamping force is a state not in place under normal working conditions, delaying a preset time to send an interaction request for the clutch;

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

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

[0052] Optionally, the device further comprises: a pressurizing unit;

[0053] The pressurizing 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, pressurizing the steel belt 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, an embodiment of the present application provides a vehicle, the vehicle comprising a processor and a memory:

[0057] The memory is used to store a computer program and transmit the computer program to the processor;

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

[0059] On the other hand, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and the computer program is used to implement the method described in the above aspects.

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

[0061] According to the technical solution of the embodiment of the present application, if it is detected that the neutral gear of the traditional continuously variable transmission is switched to the forward gear, or it is detected that the gear gear of the new continuously variable transmission is switched to the steel belt gear, first, the estimated time of arrival of the steel belt clamping force is calculated by the current torque, the torque change rate and the protection torque; and the response time corresponding to the current oil temperature is queried through the corresponding relationship between the oil temperature and the response time to determine it as the estimated response time of the steel belt clamping force; then, the shifting demand time of the steel belt clamping force is determined by the estimated arrival time and the estimated response time; finally, the pressure request for the steel belt clamping force is sent in advance of the shifting demand time. It can be seen that the method identifies in advance the time required to increase the steel belt clamping force during the shifting process such as the neutral gear switching forward gear of the traditional continuously variable transmission or the gear gear switching steel belt gear of the new continuously variable transmission, and sends the pressure request for the steel belt clamping force in advance of the required time, so as to realize the steel belt protection in advance; and the clutch is pre-filled after the steel belt protection is realized, which can reduce the demand for the instantaneous flow of the system to avoid the system's insufficient instantaneous flow, thereby improving the safety of the steel belt and the interactivity of the clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0064] Figure 2 A schematic diagram of improving the steel belt clamping force and clutch pre-charging during the neutral shift forward gear shift process based on a conventional continuously variable transmission provided for related technologies;

[0065] Figure 3A schematic diagram of a transmission chain based on a new type of continuously variable transmission provided for related technologies;

[0066] Figure 4 A schematic diagram of improving the steel belt clamping force and clutch pre-charging during the gear shift steel belt shift of a new type of continuously variable transmission provided for related technology;

[0067] Figure 5 A schematic diagram of a system framework involved in an application scenario provided in an embodiment of the present application;

[0068] Figure 6 A schematic flow chart of a method for processing a gear shifting process provided in an embodiment of the present application;

[0069] Figure 7 A schematic diagram of sending a pressurization request for the steel belt clamping force in advance of the shift demand time of the steel belt clamping force when the duty cycle change amount of the gear position sensor of the traditional continuously variable transmission is a preset change amount provided in an embodiment of the present application;

[0070] Figure 8 A schematic diagram of improving the steel belt clamping force and clutch pre-charging during the neutral-to-forward gear shifting process based on a conventional continuously variable transmission provided in an embodiment of the present application;

[0071] Fig. 9 A schematic diagram of improving the steel belt clamping force and clutch pre-charging during the gear shifting steel belt gear shifting process of a novel continuously variable transmission provided in an embodiment of the present application;

[0072] Fig.10 A schematic diagram of the structure of a device for processing a gear shifting process provided in an embodiment of the present application. DETAILED DESCRIPTION

[0073] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0074] See also Figure 1, showing a schematic diagram of a transmission chain based on a traditional continuously variable transmission provided by the relevant technology; wherein, the slave cylinder determines its pressure according to the torque transmitted by the steel belt and the actual speed ratio between the speed of the driving pulley and the speed of the driven pulley, so as to ensure that the steel belt can safely transmit torque, that is, the slave cylinder is responsible for the clamping force of the steel belt; the active cylinder determines its pressure according to the target speed ratio between the engine speed and the speed of the output end of the rheostat and the oil pressure of the slave cylinder, so as to ensure that the actual speed ratio follows the target speed ratio, that is, the active cylinder is responsible for speed ratio control. In the shifting process of switching from neutral to forward gear, the clutch needs to be engaged, and the speed of the output end of the rheostat connected to the engine is quickly synchronized with the speed of the driving pulley. The steel belt transmission will generate a large impact load, which requires not only increasing the clamping force of the steel belt to achieve steel belt protection, but also pre-charging the clutch to achieve clutch interaction.

[0075] See also Figure 2 , showing a schematic diagram of increasing the steel belt clamping force and clutch pre-charging during the neutral-to-forward gear shifting process based on a traditional continuously variable transmission provided by the relevant technology; wherein, increasing the steel belt clamping force and pre-charging the clutch occur simultaneously, the instantaneous flow of the system is insufficient, and the actual pressure corresponding to the steel belt clamping force drops, resulting in the risk of the steel belt slipping, and the pressure jitter is obvious in the clutch pre-charging stage, affecting the clutch pre-charging effect.

[0076] See also Figure 3 , shows a transmission chain schematic diagram based on a new type of continuously variable transmission provided by the relevant technology; wherein, the C1 clutch and the C2 clutch are responsible for switching the transmission power flow, when the C1 clutch is combined with the C2 clutch and opened, the power is transmitted through the gear set; when the C1 clutch is opened and the C2 clutch is combined, the power is transmitted through the steel belt; the slave cylinder determines its pressure according to the steel belt transmission torque and the actual speed ratio between the driving pulley speed and the driven pulley speed, so as to ensure that the steel belt can safely transmit the torque, that is, the slave cylinder is responsible for the steel belt clamping force; the active cylinder determines its pressure according to the target speed ratio between the engine speed and the rheostat output end speed and the slave cylinder oil pressure, so as to ensure that the actual speed ratio follows the target speed ratio, that is, the active cylinder is responsible for the speed ratio control. In the shifting process of switching the gear gear to the steel belt gear, it is necessary to open the C1 clutch and combine the C2 clutch, and the speed of the rheostat output end connected to the engine is quickly synchronized with the speed of the driving pulley. The steel belt transmission will generate a large impact load, and it is necessary not only to increase the steel belt clamping force to achieve steel belt protection, but also to pre-charge the C1 clutch to achieve clutch interaction.

[0077] See also Figure 4, showing a schematic diagram of increasing the steel belt clamping force and clutch pre-charging during the gear shifting process of the steel belt gear based on a new type of continuously variable transmission provided by the relevant technology; wherein, increasing the steel belt clamping force and pre-charging the clutch occur simultaneously, the instantaneous flow of the system is insufficient, and the actual pressure corresponding to the steel belt clamping force drops, resulting in the risk of slipping of the steel belt, and the pressure jitter is obvious in the clutch pre-charging stage, affecting the clutch pre-charging effect.

[0078] That is, in the above-mentioned gear shifting process such as switching from neutral to forward gear based on the traditional continuously variable transmission or switching from gear to steel belt gear based on the new continuously variable transmission, increasing the clamping force of the steel belt and pre-charging the clutch occur at the same time. The system's instantaneous flow is insufficient, resulting in the risk of slipping of the steel belt and poor clutch pre-charging effect, which seriously affects the safety of the steel belt and the interaction of the clutch.

[0079] In order to solve this problem, in an embodiment of the present application, the time required to increase the steel belt clamping force during the gear shifting process such as switching from neutral to forward gear based on a traditional continuously variable transmission or switching from gear to steel belt gear based on a new continuously variable transmission is identified in advance, and a pressurization request for the steel belt clamping force is sent in advance of the required time so as to achieve steel belt protection in advance; pre-filling the clutch after achieving steel belt protection can reduce the system instantaneous flow demand to avoid insufficient instantaneous flow of the system, thereby improving the safety of the steel belt and the interactivity of the clutch.

[0080] For example, one of the scenarios of the embodiments of the present application may be applied to Figure 5 In the scenario shown. The scenario includes a vehicle 500, and the vehicle 500 includes a processor 501, and the processor 501 executes the implementation method provided in the embodiment of the present application to achieve steel belt protection in advance; pre-filling the clutch after achieving steel belt protection can reduce the demand for system instantaneous flow to avoid insufficient instantaneous flow of the system, thereby improving steel belt safety and clutch interactivity.

[0081] First, in the above application scenario, although the action description of the implementation method provided in the embodiment of the present application is executed by the processor 501; however, the embodiment of the present application is not limited in terms of the execution subject, as long as the actions disclosed in the implementation method provided in the embodiment of the present application are executed.

[0082] Secondly, the above scenario is only an example scenario provided by the embodiment of the present application, and the embodiment of the present application is not limited to this scenario.

[0083] The specific implementation of the method for processing the gear shifting process and the related devices in the embodiment of the present application will be described in detail below with reference to the accompanying drawings through embodiments.

[0084] First, a specific implementation method of the method for processing the gear shifting process in the embodiment of the present application is described in detail through an embodiment.

[0085] See also Figure 6 , shows a flow chart of a method for processing a gear shift process in an embodiment of the present application. In this embodiment, the method may include the following steps:

[0086] S601: If it is detected that the neutral gear is switched to the forward gear based on the traditional continuously variable transmission, or it is detected that the gear gear is switched to the steel belt gear based on the new continuously variable transmission, the estimated time for the steel belt clamping force to be in place is determined based on the current torque, the torque change rate and the protection torque.

[0087] S602: 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.

[0088] In the related technology, in the shifting process of switching from neutral to forward gear based on the traditional continuously variable transmission or switching from gear to steel belt gear based on the new continuously variable transmission, it is necessary not only to increase the steel belt clamping force to achieve steel belt protection, but also to pre-fill the clutch to achieve clutch interaction. However, in the above-mentioned shifting process, increasing the steel belt clamping force and pre-filling the clutch occur at the same time, and the system's instantaneous flow is insufficient, resulting in the risk of steel belt slippage and poor clutch pre-filling effect, which seriously affects the safety of the steel belt and the interaction of the clutch.

[0089] Therefore, in the embodiment of the present application, considering that pre-filling the clutch to achieve clutch interaction after waiting for the increase of the steel belt clamping force to achieve steel belt protection is easy to cause slow power transmission and affect the vehicle's shifting performance, in order to ensure the vehicle's shifting performance without affecting the safety of the steel belt, it is further considered that in the shifting process such as switching from neutral to forward gear based on a traditional continuously variable transmission or switching from gear to steel belt gear based on a new continuously variable transmission, increasing the steel belt clamping force to achieve the change from the current torque to the protection torque at the torque change rate requires a specific time, and increasing the steel belt clamping force at the current oil temperature requires a specific response time; the steel belt clamping force is increased by advancing the specific time and the specific response time to achieve steel belt protection in advance; pre-filling the clutch after achieving steel belt protection can reduce the system's instantaneous flow demand to avoid insufficient instantaneous flow of the system, thereby improving steel belt safety and clutch interactivity.

[0090] Based on this, when it is detected that the neutral gear is switched to the forward gear based on the traditional continuously variable transmission, or when it is detected that the gear gear is switched to the steel belt gear based on the new continuously variable transmission, the current torque, torque change rate and protection torque are used in advance to calculate the specific time required to increase the steel belt clamping force so that the current torque changes at the torque change rate to the protection torque, that is, the estimated time for the steel belt clamping force to be in place; and through the correspondence between oil temperature and response time, the response time corresponding to the current oil temperature is queried as the specific response time required to increase the steel belt clamping force at the current oil temperature, that is, the estimated response time of the steel belt clamping force.

[0091] As an example, the neutral gear based on the traditional continuously variable transmission is N gear, the forward gear based on the traditional continuously variable transmission is D gear, and the current torque is T current , the protection torque is T protect If the N gear based on the traditional continuously variable transmission is detected to switch to the D gear, or the gear gear based on the new continuously variable transmission is detected to switch to the steel belt gear, according to T current , torque change rate and T protect , determine the estimated time for the steel belt clamping force to be in place as Δt1; according to the corresponding relationship between oil temperature and response time, the response time corresponding to the current oil temperature is determined as the estimated response time for the steel belt clamping force as Δt2.

[0092] S603: Determine the shifting requirement time of the steel belt clamping force according to the estimated arrival time and the estimated response time.

[0093] In an embodiment of the present application, after executing S601-S602 to calculate the estimated time to arrive at the steel belt clamping force and querying to obtain the estimated response time of the steel belt clamping force, it is necessary to use the total time of the estimated time to arrive at the steel belt and the estimated response time as the time required to increase the steel belt clamping force, so as to increase the steel belt clamping force and realize steel belt protection in advance; based on this, after executing S601-S602, it is also necessary to determine the shifting requirement time of the steel belt clamping force through the estimated time to arrive at the steel belt and the estimated response time.

[0094] As an example, based on the above example, according to the estimated arrival time Δt1 and the estimated response time Δt2, the shift requirement time of the steel belt clamping force is determined to be Δt, that is, Δt=Δt1+Δt2.

[0095] S604: Send a pressurization request for the steel belt clamping force in advance of the shift demand time.

[0096] In the embodiment of the present application, after executing S603 to determine the shift requirement time of the steel belt clamping force, in order to ensure the vehicle's shifting performance without affecting the safety of the steel belt, it is also necessary to increase the steel belt clamping force in advance of the shift requirement time so as 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 shift requirement time, so as to increase the steel belt clamping force in advance of the shift requirement time, thereby achieving steel belt protection in advance, and pre-filling the clutch after the steel belt protection is achieved, which can reduce the system's instantaneous flow demand to avoid insufficient instantaneous flow of the system, thereby improving steel belt safety and clutch interactivity.

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

[0098] Through the various implementation methods provided by this embodiment, if it is detected that the neutral gear is switched to the forward gear based on the traditional continuously variable transmission, or the gear gear is switched to the steel belt gear based on the new continuously variable transmission, first, the estimated time of arrival of the steel belt clamping force is calculated through the current torque, torque change rate and protection torque; and the response time corresponding to the current oil temperature is queried through the corresponding relationship between the oil temperature and the response time to determine it as the estimated response time of the steel belt clamping force; then, the shifting demand time of the steel belt clamping force is determined by the estimated arrival time and the estimated response time; finally, the pressure request for the steel belt clamping force is sent in advance of the shifting demand time. It can be seen that the method identifies in advance the time required to increase the steel belt clamping force during the shifting process such as the neutral gear switching forward gear based on the traditional continuously variable transmission or the gear gear switching steel belt gear based on the new continuously variable transmission, and sends the pressure request for the steel belt clamping force in advance of the required time, so as to realize the steel belt protection in advance; and pre-filling the clutch after realizing the steel belt protection can reduce the demand for the instantaneous flow of the system to avoid the system's insufficient instantaneous flow, thereby improving the safety of the steel belt and the interactivity of the clutch.

[0099] In the above embodiments, during the shifting process such as switching from neutral to forward gear based on a traditional continuously variable transmission or switching from gear to steel belt gear based on a new continuously variable transmission, it is necessary to increase the clamping force of the steel belt to achieve the change of the current torque at the torque change rate to the protection torque; wherein, in order to further avoid the risk of slipping of the steel belt and to further improve the safety of the steel belt during the shifting process, the protection torque needs to be determined through the correspondence between the throttle opening and the engine torque, the engine torque corresponding to the current throttle opening needs to be queried, and the real-time inertia torque is calculated by converting the steel belt to the equivalent rotational inertia of the driving pulley and the equivalent angular acceleration of the driving pulley shaft, thereby being determined by the maximum torque of the two torques.

[0100] Based on this, first, the engine torque corresponding to the current throttle opening obtained by querying the correspondence between the throttle opening and the engine torque is used as the first torque, and the real-time inertia torque calculated by converting the steel belt to the equivalent rotational inertia of the driving pulley and the equivalent angular acceleration of the driving pulley shaft is used as the second torque. Then, the maximum torque is selected from the first torque and the second torque 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 implementation of the embodiment of the present application, the step of determining the protection torque includes the following S1-S3 (not shown in the figure):

[0101] S1: 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.

[0102] S2: Determine the second torque based on the equivalent rotational 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, 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.

[0104] As an example, the equivalent moment of inertia of the steel belt converted to the driving pulley is J, and the equivalent angular acceleration of the driving pulley shaft is ω. Based on the above example, 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, that is, T table ; Root J and ω, determine the second torque as J·ω; According to T table and J·ω, determine the protection torque T protect =T protect =max(T table , J·ω).

[0105] In the above embodiment, when the estimated time to put the clamping force of the steel belt into place is determined according to the current torque, the torque change rate and the protection torque in S601, since the increase in the clamping force of the steel belt is actually the change of the current torque at the torque change rate through the estimated time to put it into place to the protection torque, the torque change amount can be calculated by the protection torque and the current torque, and then the estimated time to put it into place can be calculated by the torque change amount and the torque change rate. Therefore, in an optional implementation of the embodiment of the present application, the step of determining the estimated time to put the clamping force of the steel belt into place according to 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 according to the protection torque and the current torque.

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

[0108] As an example, based on the above example, according to the protection torque T protect and the current torque T current , determine the torque change; based on the torque change and the torque change rate, determine the estimated arrival time Δt1.

[0109] In the above embodiment, when the specific implementation of the neutral gear switching forward gear based on the traditional continuously variable transmission is detected in S601, the duty cycle change of the gear position sensor can be obtained in real time. Since the duty cycle change of the gear position sensor is a preset change, it indicates that there is an intention to switch the neutral gear forward gear; therefore, the duty cycle change of the gear position sensor based on the traditional continuously variable transmission is detected to be the preset change, which means that the neutral gear switching forward gear based on the traditional continuously variable transmission is detected. That is, in an optional implementation of the embodiment of the present application, the neutral gear switching forward gear based on the traditional continuously variable transmission is detected, specifically: the duty cycle change of the gear position sensor is detected to be the preset change.

[0110] As an example, based on the above example, it is detected that the duty cycle change of the gear position sensor based on the traditional continuously variable transmission is a preset change, that is, it is detected that the N gear is switched to the D gear based on the traditional continuously variable transmission.

[0111] See also Figure 7 , Figure 7 A schematic diagram of an embodiment of the present application is shown of sending a pressurization request for the steel belt clamping force in advance of the shift demand time of the steel belt clamping force when the duty cycle change of the gear position sensor based on the traditional continuously variable transmission is a preset change; based on the above example, when it is detected that the duty cycle change of the gear position sensor based on the traditional continuously variable transmission is a preset change, that is, when it is detected that the N gear is switched to the D gear based on the traditional continuously variable transmission, a pressurization request for the steel belt clamping force is sent in advance of the shift demand time Δt.

[0112] In the above embodiment, considering that the gear shifting of the steel belt gear based on the new continuously variable transmission is actually the current vehicle speed changes to the gear shifting speed of the steel belt gear according to the vehicle speed change rate, and further when the current vehicle speed reaches a specific vehicle speed, the vehicle speed change rate changes to the gear shifting speed after the shifting requirement time. When S604 is specifically implemented, when the current vehicle speed reaches the specific vehicle speed, it is necessary to send a pressurization request for the steel belt clamping force.

[0113] Based on this, first, the specific vehicle speed required for the shift speed to be changed from the vehicle speed change rate to the shift speed after the shift demand time is calculated through the shift speed, vehicle speed change rate and shift demand time of the gear shifting steel belt gear, that is, the shift identification speed; then, when the current vehicle speed is the shift identification speed, a pressurization request for the steel belt clamping force is sent to achieve the sending of the pressurization request for the steel belt clamping force in advance of the shift demand time. Therefore, in an optional implementation of the embodiment of the present application, when the gear shifting steel belt gear based on the new continuously variable transmission is detected, S604 includes the following S6041-S6042 (not shown in the figure):

[0114] S6041: Determine the gear shift recognition vehicle speed according to the gear shift vehicle speed, vehicle speed change rate and gear shift requirement time when switching the gear gear to the steel belt gear.

[0115] S6042: If the current vehicle speed is the gear shift recognition speed, a pressurization request for the steel belt clamping force is sent.

[0116] As an example, the gear shift speed for the steel belt gear is V shift , the current vehicle speed is V current , according to V shift , vehicle speed change rate and Δt, determine the shift recognition speed as V identify ; If V current V identify , sending a pressure request for the steel belt clamping force.

[0117] In addition, for the above-mentioned embodiment, the current state of the steel belt clamping force can be determined by the current working condition of the vehicle and whether the steel belt clamping force is in place, which can be specifically divided into three states: the clamping force is in place, the normal working condition is not in place, and the severe working condition is not in place; when the current state of the steel belt clamping force is in place, the clutch can be pre-filled normally to realize the clutch interaction normally; when the current state of the steel belt clamping force is the normal working condition is not in place, it is necessary to delay the preset time and then pre-fill the clutch to realize the clutch interaction; when the current state of the steel belt clamping force is the severe working condition is not in place, it is necessary to wait for the steel belt clamping force to be in place, and it is necessary to suspend sending the interaction request for the clutch to avoid increasing the steel belt clamping force and pre-filling the clutch at the same time, resulting in the risk of slipping of the steel belt and poor clutch pre-filling effect. Therefore, in an optional implementation of the embodiment of the present application, after sending the pressurization request for the steel belt clamping force in advance of the shifting requirement time, the method also includes the following S4, S5 or S6 (not shown in the figure):

[0118] S4: If the current state of the steel belt clamping force is in place, an interaction request for the clutch is sent.

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

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

[0121] Among them, the severe working conditions include the state where the steel belt clamping force is not in place due to the activation of the anti-lock brake system (ABS) / traction control system (TCS), the state where the steel belt clamping force is not in place due to wheel slippage, etc.

[0122] In addition, for the above embodiment, in order to further improve the safety of the steel belt, the real-time impact load generated by the clutch interaction can be further generated during the clutch interaction process. When the real-time impact load is less than or equal to the preset protection load, the steel belt is pressurized according to the pre-protection value to further achieve steel belt protection; 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 achieve steel belt protection. Therefore, in an optional implementation of the embodiment of the present application, the method also includes the following S7 or S8 (not shown in the figure):

[0123] S7: 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.

[0124] S8: 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.

[0125] As an example, see Figure 8 , shows a schematic diagram of increasing the steel band clamping force and clutch pre-charging during the forward gear shifting process of neutral gear switching based on a traditional continuously variable transmission provided by an embodiment of the present application; based on the above example, it is detected that the N gear is switched to the D gear based on the traditional continuously variable transmission, and a pressurization request for the steel band clamping force is sent in advance of the shifting demand time Δt; when the current state of the steel band clamping force is a normal working condition not in place state, it is necessary to delay the preset time and then pre-charge the clutch to achieve clutch interaction; when the current state of the steel band clamping force is in place state, the clutch can be pre-charged normally to achieve clutch interaction normally; due to the early realization of steel band protection; pre-charging the clutch after realizing steel band protection can reduce the demand for system instantaneous flow, that is, the system instantaneous flow is sufficient, not only the actual pressure corresponding to the steel band clamping force does not drop, but also does not affect the clutch pre-charging effect. During the clutch interaction process, if the real-time impact load is less than or equal to the preset protection load, the steel band is pressurized according to the preset protection load.

[0126] See also Fig. 9 , shows a schematic diagram of increasing the steel band clamping force and clutch pre-charging during the gear shifting process of the steel band gear switching based on the new continuously variable transmission provided by the embodiment of the present application; based on the above example, the steel band gear switching based on the new continuously variable transmission is detected, and the pressurization request for the steel band clamping force is sent in advance of the shifting demand time Δt; when the current state of the steel band clamping force is the normal working condition and not in place state, it is necessary to delay the preset time and then pre-charge the clutch to achieve clutch interaction; when the current state of the steel band clamping force is in place state, the clutch can be pre-charged normally to achieve clutch interaction normally; due to the early realization of steel band protection; pre-charging the clutch after realizing steel band protection can reduce the demand for system instantaneous flow, that is, the system instantaneous flow is sufficient, not only the actual pressure corresponding to the steel band clamping force does not drop, but also does not affect the clutch pre-charging effect. During the clutch interaction process, if the real-time impact load is greater than the preset protection load, the steel band is pressurized according to the real-time impact load.

[0127] Next, the specific implementation of the method for processing the gear shifting process in the embodiment of the present application is described in detail through another embodiment.

[0128] See also Fig.10 , shows a schematic diagram of the structure of a processing device for a gear shift process in an embodiment of the present application. In this embodiment, the device may specifically include: a determining unit 1001 and a sending unit 1002;

[0129] The determination unit 1001 is used to determine the estimated arrival time of the steel belt clamping force according to the current torque, the torque protection rate and the protection torque if it is detected that the neutral gear is switched to the forward gear based on the conventional continuously variable transmission, or if it is detected that the gear gear is switched to the steel belt gear based on the novel continuously variable transmission;

[0130] The determination unit 1001 is further used to determine the response time corresponding to the current oil temperature as the estimated response time of the steel belt clamping force according to the corresponding relationship between the oil temperature and the response time;

[0131] The determination unit 1001 is further used to determine the shifting requirement time of the steel belt clamping force according to the estimated arrival time and the estimated response time;

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

[0133] In an optional implementation of the embodiment of the present application, it is detected that the forward gear is switched from the neutral gear of the traditional continuously variable transmission, specifically:

[0134] It is detected that the duty cycle change of the gear position sensor is a preset change.

[0135] In an optional implementation of the embodiment of the present application, when it is detected that the gear gear based on the novel continuously variable transmission switches to a steel belt gear, the sending unit 1002 is specifically used to:

[0136] Determine the gear shift recognition speed according to the gear shift vehicle speed, vehicle speed change rate and gear shift requirement time when the gear gear switches to the steel belt gear;

[0137] If the current vehicle speed is the gear shift recognition speed, a pressurization request for the steel belt clamping force is sent.

[0138] In an optional implementation of the embodiment of the present application, the determining unit 1002 is specifically configured to:

[0139] Determine the torque change according to the protection torque and the current torque;

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

[0141] In an optional implementation of the embodiment of the present application, the determining unit 1002 is further configured to:

[0142] 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;

[0143] Determine the second torque according to 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 an optional implementation of the embodiment of the present application, the sending unit 1002 is further used for:

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

[0147] If the current state of the steel belt clamping force is not in the normal working state, a request for interaction with the clutch is sent after a preset time delay;

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

[0149] The pause unit is used to pause sending the interaction request for the clutch if the current state of the steel belt clamping force is a severe working condition and is not in place.

[0150] In an optional implementation of the embodiment of the present application, the device further includes: a pressurizing unit;

[0151] Pressurizing unit for:

[0152] 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;

[0153] 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.

[0154] Through the various implementation methods provided in this embodiment, the processing device of the gear shifting process includes a determining unit and a sending unit; wherein, if the determining unit detects the switching of the neutral gear to the forward gear based on the traditional continuously variable transmission, or detects the switching of the gear gear to the steel belt gear based on the new continuously variable transmission, the estimated time for the steel belt clamping force to be in place is calculated through the current torque, the torque change rate and the protection torque; and through the correspondence between the oil temperature and the response time, the response time corresponding to the current oil temperature is queried and determined as the estimated response time of the steel belt clamping force; the gear shifting requirement time of the steel belt clamping force is determined through the estimated time to be in place and the estimated response time; the sending unit sends a pressurization request for the steel belt clamping force in advance of the gear shifting requirement time. It can be seen that the device identifies in advance the time required to increase the steel belt clamping force during the gear shifting process such as switching from neutral to forward gear based on the traditional continuously variable transmission or switching from gear to steel belt gear based on the new continuously variable transmission, and sends a pressurization request for the steel belt clamping force in advance of the required time, so as to achieve steel belt protection in advance; pre-filling the clutch after achieving steel belt protection can reduce the system's instantaneous flow demand to avoid insufficient instantaneous flow of the system, thereby improving the safety of the steel belt and the interactivity of the clutch.

[0155] In addition, an embodiment of the present application further provides a vehicle, the vehicle comprising a processor and a memory:

[0156] The memory is used to store a computer program and transmit the computer program to the processor;

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

[0158] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and the computer program is used to implement the method described in the above embodiment.

[0159] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0160] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0161] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0162] The above is only a preferred embodiment of the present application and does not constitute any formal limitation to the present application. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present application using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of protection of the technical solution of the present application.

Claims

1. A method for processing a gear shift process, characterized in that: include: If it is detected that the forward gear is switched from the neutral gear of the conventional continuously variable transmission, or it is detected that the steel belt gear is switched from the gear gear of the new continuously variable transmission, the estimated time for the steel belt clamping force to be in place 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; Determine the shifting requirement time of the steel belt clamping force according to the estimated arrival time and the estimated response time; A pressurization request for the clamping force of the steel belt is sent in advance of the shift demand time.

2. The method according to claim 1, characterized in that: The detection of switching forward gear from neutral gear to forward gear based on a conventional continuously variable transmission is specifically as follows: It is detected that the duty cycle change of the gear position sensor is a preset change.

3. The method according to claim 1, characterized in that When the gear shift to the steel belt gear based on the novel continuously variable transmission is detected, sending a pressurization request for the steel belt clamping force in advance of the gear shift requirement time includes: Determining a gear shift recognition vehicle speed according to the gear shift vehicle speed, vehicle speed change rate and the gear shift requirement time when the gear gear is switched to the steel belt gear; If the current vehicle speed is the gear shift recognition vehicle speed, a pressurization request for the steel belt clamping force is sent.

4. The method according to claim 1, characterized in that: Determining the estimated time for the steel belt clamping force to be in place according to the current torque, the torque protection rate and the protection torque includes: Determining a torque change according to the protection torque and the current torque; The estimated arrival time is determined according to the torque change amount and the torque change rate.

5. The method according to any one of claims 1 to 4, characterized in that: The step of determining the protection torque comprises: 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; Determine the second torque according to the equivalent moment of inertia of the steel belt converted to the driving pulley and the equivalent angular acceleration of the driving pulley shaft; 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.

6. The method according to claim 1, characterized in that After sending the pressurization request for the steel belt clamping force in advance of the shifting requirement time, the method further includes: If the current state of the steel belt clamping force is in place, sending an interaction request for the clutch; If the current state of the steel belt clamping force is a state not in place under normal working conditions, delaying a preset time to send an interaction request for the clutch; If the current state of the steel belt clamping force is a severe working condition state, the sending of the interaction request for the clutch is suspended.

7. The method according to claim 1, characterized in that The method further comprises: During the interaction of the clutch, if the real-time impact load is less than or equal to the preset protection load, pressurizing the steel belt according to the preset protection load; 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.

8. A processing device for a gear shift process, characterized in that: include: Determine the unit and send the unit; The determination unit is used to determine the estimated time for the steel belt clamping force to be in place according to the current torque, the torque protection rate and the protection torque if it is detected that the neutral gear is switched to the forward gear based on the traditional continuously variable transmission, or if it is detected that the gear gear is switched to the steel belt gear based on the new continuously variable transmission; The determination unit is further configured to determine the response time corresponding to the current oil temperature as the estimated response time of the steel belt clamping force according to the corresponding relationship between the oil temperature and the response time; The determination unit is further used to determine the shifting requirement time of the steel belt clamping force according to the estimated arrival time and the estimated response time; The sending unit is used to send a pressurization request for the clamping force of the steel belt in advance of the gear shifting requirement time.

9. A vehicle, characterized in that: The vehicle comprises a processor and a memory: The memory is used 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 to 7 according to the instructions in the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program is used to implement the method according to any one of claims 1 to 7.

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