A control method and device for protecting a transmission during regeneration of a vehicle DPF, a vehicle and a medium

Abstract

The application provides a control method and device for protecting a transmission during DPF regeneration of a vehicle, a vehicle and a medium, and belongs to the technical field of DPF regeneration of a vehicle. An engine parking regeneration signal is monitored. In response to the parking regeneration signal sent by an engine control unit, it is determined whether the current torque converter slip is greater than a preset slip threshold. If the torque converter slip is not greater than the preset slip threshold, parking regeneration is performed. The oil temperature information of the torque converter is monitored in real time, and the state of the parking regeneration is controlled based on the oil temperature information of the torque converter. The application can protect the hydraulic automatic transmission and effectively solve the problem of damage to the transmission during DPF regeneration of a diesel engine.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicle DPF regeneration, and particularly relates to a control method and device for protecting a transmission during vehicle DPF regeneration, a vehicle and a medium. BACKGROUND

[0002] The transmission of a diesel vehicle is mainly manual. Although a manual transmission has a simple structure and a relatively low price, the labor intensity of a driver in driving operation is high, which easily leads to fatigue driving and affects driving safety. With the simplification of automatic transmission driving operation, driving safety can be improved, and the difference in fuel economy, power performance, emission performance and transmission system life caused by different levels of drivers is eliminated. Therefore, the demand for automatic transmissions in the current diesel vehicle market is increasing.

[0003] With the emergence of diesel vehicles equipped with automatic transmissions, some problems have also emerged. For example, when a diesel particulate filter (DPF) of a diesel engine is regenerated, the engine speed is increased. If the slip of the hydraulic torque converter is too large, the running stability of the engine may be affected, thereby affecting the regeneration effect. Moreover, during the parking regeneration process, the engine needs to adjust the operating state to increase the exhaust temperature, which may cause torque fluctuations. If the slip of the hydraulic torque converter is too large at this time, it will cause great impact and wear on the transmission. SUMMARY

[0004] The application provides a control method for protecting a transmission during vehicle DPF regeneration. The method can effectively solve the problem of damage to the transmission during DPF regeneration of a diesel engine.

[0005] The method comprises the following steps:

[0006] S101: monitoring an engine parking regeneration signal;

[0007] S102: in response to the parking regeneration signal issued by the engine control unit, determining whether the slip of the hydraulic torque converter is greater than a preset slip threshold;

[0008] S103: if the slip is not greater than the preset slip threshold, performing parking regeneration;

[0009] S104: monitoring the oil temperature information of the hydraulic torque converter in real time, and controlling the state of parking regeneration based on the oil temperature information of the hydraulic torque converter.

[0010] It should be further explained that in the step S104, when the oil temperature information of the hydraulic torque converter is higher than a preset oil temperature threshold, the parking regeneration is stopped.

[0011] It should be further explained that the step S102 further comprises the following steps:

[0012] If the current torque converter slip is greater than the preset slip threshold, the parking regeneration is not performed.

[0013] It is further explained that in the method, during the parking regeneration, the gearbox control unit automatically switches to the driving regeneration shift map.

[0014] It is further explained that the step S103 further comprises:

[0015] obtaining engine water temperature information, vehicle speed information and gear information;

[0016] determining whether the engine water temperature information, the vehicle speed information and the gear information satisfy the parking regeneration condition;

[0017] When the engine water temperature information is greater than the preset engine water temperature threshold, the vehicle speed information is zero, and the gear information is neutral, the parking regeneration is performed.

[0018] It is further explained that the method further comprises: if the vehicle speed information is zero, the vehicle is in an idle state;

[0019] obtaining an idle state duration, and if the idle state duration is greater than a first preset idle duration, the parking regeneration condition is satisfied;

[0020] In response to the parking regeneration signal emitted by the engine, if the current torque converter slip is not greater than the preset slip threshold, the parking regeneration is performed.

[0021] If the idle state duration is less than the first preset idle duration, and the vehicle speed information is greater than 0, it is determined that the vehicle enters a driving state.

[0022] The gearbox control unit performs a delay shift, and monitors the oil temperature information of the torque converter and the driving state in real time, and controls the state of the parking regeneration based on the oil temperature information of the torque converter.

[0023] It is further explained that the method further comprises: determining whether the carbon accumulation amount in the diesel particulate filter is greater than or equal to a preset carbon accumulation amount preset threshold;

[0024] If it is greater than or equal to the preset carbon accumulation amount preset threshold, the process of monitoring the engine parking regeneration signal is started.

[0025] The application also provides a control device for protecting the transmission during DPF regeneration of a vehicle, which comprises:

[0026] a signal monitoring module for monitoring the engine parking regeneration signal;

[0027] a slip determination module for determining whether the current torque converter slip is greater than a preset slip threshold in response to the parking regeneration signal emitted by the engine control unit;

[0028] The regeneration execution module is configured to execute the parking regeneration when the current torque converter slip is not greater than a preset slip threshold.

[0029] The oil temperature monitoring module is configured to monitor oil temperature information of the torque converter in real time, and control a state of the parking regeneration based on the oil temperature information of the torque converter.

[0030] According to another embodiment of the present application, a vehicle is provided, comprising: an engine control unit, a gearbox control unit, and a particulate filter;

[0031] The gearbox control unit is in communication connection with the engine control unit, and is configured to implement the control method for protecting the gearbox during DPF regeneration of the vehicle.

[0032] According to still another embodiment of the present application, a storage medium having a computer program stored thereon is also provided, the computer program being executed by a processor to implement the steps of the control method for protecting the gearbox during DPF regeneration of the vehicle.

[0033] As can be seen from the above technical solutions, the present application has the following advantages:

[0034] In the control method for protecting the gearbox during DPF regeneration of the vehicle provided by the present application, in response to a parking regeneration signal issued by the engine control unit, it is determined whether the current torque converter slip is greater than a preset slip threshold; if not, parking regeneration is executed. If the torque converter slip is too large, it may affect the running stability of the engine, thereby affecting the regeneration effect. By determining whether the slip is appropriate, the engine can be ensured to regenerate under the best working condition, thereby improving the regeneration efficiency and effect. By determining whether the torque converter slip exceeds the preset threshold, the present application can avoid parking regeneration when the gearbox is in an unstable working state, thereby reducing the impact and wear on the gearbox and protecting the service life and performance of the gearbox.

[0035] The gearbox control unit of the present application also protects the gearbox according to the oil temperature information and other related parameters, such as reducing the oil temperature and reducing the load, to ensure the safety and stability of the gearbox. The real-time monitoring and determination of the oil temperature information of the torque converter, and the control of the parking regeneration state based on the oil temperature information of the torque converter, can effectively protect the gearbox and ensure the smooth progress of the regeneration process. Moreover, monitoring the oil temperature information of the torque converter in real time and stopping parking regeneration when the oil temperature is too high can effectively prevent the gearbox from being damaged due to overheating. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the description will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0037] Figure 1 Flow chart of the control method for protecting the transmission when the DPF of the vehicle is regenerated

[0038] Figure 2 Flow chart of the control method for protecting the transmission when the DPF of the vehicle is regenerated

[0039] Figure 3 Schematic diagram of the control device for protecting the transmission when the DPF of the vehicle is regenerated DETAILED DESCRIPTION

[0040] The implementation process of the control method for protecting the transmission when the DPF of the vehicle is regenerated will be described in detail below. For the purpose of illustration but not for the purpose of limitation, specific details such as specific system structures, techniques, etc. are presented in order to thoroughly understand the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details.

[0041] It should be understood that when used in the present application, the term "comprising" indicates the existence of the described features, integers, steps, operations, elements and / or components, but does not exclude the existence or addition of one or more other features, integers, steps, operations, elements, components and / or sets thereof. The terms "comprise", "contain", "have" and their variants mean "including but not limited to", unless otherwise specifically emphasized.

[0042] It should be understood that the "one or more" referred to in the present application means one, two or more than two, and the "multiple" referred to in the present application means two or more than two. In the description of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B. "And / or" in this paper is only a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone.

[0043] The language "one embodiment" or "the embodiment" appearing in the present application means that a specific feature, structure, or characteristic described in the embodiment is included in at least one embodiment of the present application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments", and the like appearing in the present application do not necessarily all refer to the same embodiment, but mean that "one or more but not all embodiments" of the present application, unless otherwise specifically indicated otherwise.

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] Please refer to Figure 1 The flow chart of the control method for protecting the transmission during DPF regeneration of the vehicle in a specific embodiment is shown, and the method comprises:

[0046] S101: Monitor the engine stationary regeneration signal.

[0047] In some embodiments, the engine control unit or the vehicle controller can continuously monitor the running signal of the vehicle engine. Specifically, the stationary regeneration signal for DPF regeneration demand can be monitored. The regeneration signal can be triggered based on the clogging degree of the DPF or other related parameters.

[0048] For the control method for protecting the transmission during DPF regeneration of the vehicle in the present embodiment, the monitored engine stationary regeneration signal specifically comprises:

[0049] The clogging degree signal of the particulate filter can be monitored by the engine control unit through sensors or internal algorithms to monitor the clogging degree of the DPF.

[0050] Specifically, when the particulate matter in the DPF accumulates to a certain degree, affecting the engine performance and emissions, the ECU will send a signal that regeneration is needed. This is the main basis for starting the stationary regeneration process.

[0051] Optionally, it is determined whether the carbon accumulation amount in the diesel particulate trap is greater than or equal to a preset carbon accumulation amount threshold value; if greater than or equal to the preset carbon accumulation amount threshold value, the process of monitoring the engine stationary regeneration signal is started.

[0052] In some specific embodiments, the ECU comprehensively judges according to the parameters such as the rotating speed, load, exhaust temperature, etc. of the engine. In this way, it can be ensured that the parking regeneration is carried out under a suitable engine working condition, and the adverse effects of regeneration under extreme working conditions on the engine and the transmission are avoided.

[0053] As an implementation manner of the embodiment, the regeneration request issued by the driver through the operation interface or the request automatically issued by the ECU according to the preset regeneration strategy can be used as a direct trigger signal for starting the parking regeneration process.

[0054] In this way, the timeliness of regeneration is ensured, and by monitoring the clogging degree of the DPF, the regeneration process can be started in time when the particulate matter accumulates to a certain degree, so that the serious effects of aggravated clogging on the engine performance and emission are avoided.

[0055] In the embodiment, the regeneration is started in combination with the engine working condition signal, so that the regeneration can be ensured to be carried out under a suitable working condition. The embodiment also starts the regeneration process in an automatic or manual manner, and provides necessary prompts and indications during the regeneration process, so that the driving experience can be improved.

[0056] For the embodiment, in order to protect the transmission, by controlling the slip and oil temperature of the hydraulic torque converter of the transmission during the parking regeneration process, the impact and wear of the regeneration process on the transmission can be reduced, and the service life and performance of the transmission are protected.

[0057] S102: In response to the parking regeneration signal issued by the engine control unit, it is judged whether the current slip of the hydraulic torque converter is greater than a preset slip threshold.

[0058] In some embodiments, the slip data of the hydraulic torque converter is read in real time, which can be realized by the transmission control unit. The collected slip data is compared with the preset slip threshold, and it is judged whether the current slip is within a safe range.

[0059] In some specific embodiments, a rotating speed sensor and a pressure sensor can be installed on the hydraulic torque converter to monitor the operating parameters of the hydraulic torque converter in real time. Then the collected data is transmitted to the transmission control unit or the engine control unit for subsequent processing and analysis.

[0060] The transmission control unit or the engine control unit receives and processes the operating parameters of the hydraulic torque converter in real time. Preferably, the collected operating parameters of the hydraulic torque converter can be filtered, denoised and corrected.

[0061] According to the working principle of the hydraulic torque converter, the slip of the hydraulic torque converter is calculated by using the collected rotating speed of the pump wheel and the rotating speed of the turbine.

[0062] The slip here is a parameter reflecting the working state of the hydraulic torque converter, and the size of the slip is closely related to the transmission efficiency, torque fluctuation, etc. of the transmission.

[0063] In this embodiment, the calculated slip is compared with a preset slip threshold.

[0064] It should be noted that the preset slip threshold is determined comprehensively according to the design parameters, use experience, performance requirements, etc. of the transmission, and is used to judge whether the working state of the current hydraulic torque converter is stable.

[0065] If the slip is less than or equal to the preset threshold, it is considered that the working state of the current hydraulic torque converter is stable and suitable for parking regeneration.

[0066] S103: If it is not greater than the preset slip threshold, parking regeneration is performed.

[0067] In this embodiment, the parking regeneration is operated under a preset working condition to ensure that the particulate matter in the DPF can be effectively removed. If the slip of the hydraulic torque converter is too large, it may affect the running stability of the engine, thereby affecting the regeneration effect. By judging whether the slip is appropriate, the engine can be ensured to regenerate under the best working condition, thereby improving the regeneration efficiency and effect.

[0068] That is, if the slip is greater than the preset threshold, it is considered that the working state of the current hydraulic torque converter is unstable and is not suitable for parking regeneration, and appropriate protection measures or warning information may need to be taken.

[0069] As can be seen, by judging whether the slip of the hydraulic torque converter exceeds the preset threshold, the parking regeneration when the working state of the transmission is unstable can be avoided, thereby reducing the impact and wear on the transmission and protecting the service life and performance of the transmission.

[0070] In this embodiment, parking regeneration is performed when the working state of the hydraulic torque converter is stable, which can ensure the smooth progress of the regeneration process.

[0071] S104: Real-time monitoring of the oil temperature information of the hydraulic torque converter, and controlling the state of parking regeneration based on the oil temperature information of the hydraulic torque converter.

[0072] When the oil temperature information of the hydraulic torque converter is higher than the preset oil temperature threshold, the parking regeneration is stopped.

[0073] If the oil temperature information of the hydraulic torque converter is within the preset oil temperature threshold range, the parking regeneration is performed again.

[0074] In some specific embodiments, an oil temperature sensor is installed on the hydraulic torque converter to monitor the oil temperature information inside the hydraulic torque converter in real time.

[0075] The transmission control unit receives sensing information of the oil temperature sensor. The transmission control unit can preset an oil temperature threshold of the torque converter. The preset oil temperature threshold of the torque converter is determined according to design parameters of the transmission, use experience, performance requirements and other factors. The transmission control unit compares the real-time collected oil temperature information with the preset threshold to determine whether the current oil temperature is suitable for parking regeneration.

[0076] According to the comparison result of the oil temperature and the threshold, the transmission control unit will perform corresponding logical judgment. If the oil temperature is higher than the preset threshold, it is determined that parking regeneration is not suitable; if the oil temperature is within the preset threshold range, it is determined that parking regeneration is suitable.

[0077] It should be noted that when the transmission control unit determines that the oil temperature of the torque converter is suitable for parking regeneration, it will send a corresponding signal or instruction to the engine control unit. After the ECU receives the signal, it will start the parking regeneration process based on the operating state of the engine and the transmission.

[0078] Correspondingly, during the parking regeneration process, the transmission control unit will continuously monitor the oil temperature information of the torque converter and other related parameters.

[0079] That is, during the parking regeneration process, the ECU will adjust the operating state of the engine to increase the exhaust gas temperature and promote the combustion regeneration of the particulate matter in the DPF. During the parking regeneration process, the TCU will continuously monitor the oil temperature information of the torque converter and other related parameters.

[0080] If the oil temperature is found to be abnormally high or other abnormal conditions are found, the transmission control unit will immediately send an interrupt signal or adjustment instruction to the ECU to interrupt the regeneration process or adjust the engine operating state, etc.

[0081] In this embodiment, after the parking regeneration is completed, the transmission control unit will receive a feedback signal from the ECU to confirm whether the regeneration process is successfully completed.

[0082] The transmission control unit of this embodiment will also protect the transmission according to the oil temperature information and other related parameters, such as reducing the oil temperature and reducing the load, to ensure the safety and stability of the transmission.

[0083] Based on the control method for protecting the transmission during DPF regeneration of the vehicle of this embodiment, through real-time monitoring and judgment of the oil temperature information of the torque converter, and based on the information, the state control of parking regeneration, the transmission can be effectively protected and the regeneration process can be smoothly carried out. Moreover, real-time monitoring of the oil temperature information of the torque converter and stopping parking regeneration when the oil temperature is too high can effectively prevent the transmission from being damaged due to overheating.

[0084] In one example embodiment, the transmission control unit automatically switches to the on-the-road regeneration shift map during the execution of the parking regeneration process.

[0085] In some embodiments, the transmission control unit receives an on-the-road regeneration signal from the engine control unit (ECU). The regeneration signal here can be issued by the ECU according to the operating state of the engine and the regeneration demand of the DPF.

[0086] The transmission control unit identifies and interprets the regeneration signal and confirms it. According to the preset logical judgment rule, it is determined whether it is necessary to switch to the on-the-road regeneration shift map.

[0087] In this embodiment, the logical judgment can involve the current vehicle speed, engine load, transmission oil temperature, etc., to ensure that the timing and conditions of the switch meet the design requirements.

[0088] If the logical judgment result is to switch to the on-the-road regeneration shift map, the transmission control unit calls the internally stored on-the-road regeneration shift map data.

[0089] The on-the-road regeneration shift map data of this embodiment includes but is not limited to transmission gear information corresponding to different vehicle speeds and engine loads, control strategies at gear shifting, etc.

[0090] The transmission control unit selects the appropriate gear and control strategy from the on-the-road regeneration shift map according to the actual state of the vehicle and applies it to the transmission control.

[0091] The switching process of this embodiment is automatically completed according to the received signal and the preset logical judgment rule, and the switching of the shift map and the adjustment of the control strategy.

[0092] The transmission control unit communicates and controls the solenoid valves, motors, etc. of the transmission to ensure that the switching of the shift map can be accurately executed. The actuators of the transmission adjust the gear and control parameters of the transmission after receiving the instructions from the TCU.

[0093] As can be seen, the on-the-road regeneration shift map involved in this embodiment can be designed according to the characteristics and needs of the vehicle during driving, which can improve the regeneration efficiency of the DPF while ensuring the power and smoothness of the vehicle. By switching to the on-the-road regeneration shift map, the operating state of the engine and the shift logic of the transmission can be optimized, making it easier for the particulate matter in the DPF to be burned and removed.

[0094] This embodiment can reduce the dependence on parking regeneration by improving the regeneration efficiency during driving. Parking regeneration usually needs to be performed when the vehicle is stationary and requires a long time and high engine load. On-the-road regeneration can be performed automatically during vehicle driving without additional parking time and operation.

[0095] For the present embodiment, the design of the on-road regenerative shift map also takes into account the protection and service life of the transmission. After switching to the on-road regenerative shift map, the TCU takes a series of measures to reduce the load and wear of the transmission, such as optimizing shift smoothness, reducing the number of shifts, etc. to improve regenerative efficiency, reduce dependence on parking regeneration, and protect the transmission.

[0096] In an embodiment of the present application, based on step S103, a possible embodiment will be given below to specifically and non-limitingly illustrate the implementation thereof. The method further comprises the following steps:

[0097] Obtaining engine water temperature information, vehicle speed information, and gear information;

[0098] Determining whether the engine water temperature information, vehicle speed information, and gear information satisfy the parking regeneration condition;

[0099] When the engine water temperature information is greater than a preset engine water temperature threshold, the vehicle speed information is zero, and the gear information is neutral, performing parking regeneration.

[0100] In the present embodiment, the method further comprises: if the vehicle speed information is zero, the vehicle is in an idle state;

[0101] Obtaining an idle state duration, and if the idle state duration is greater than a preset idle duration, the parking regeneration condition is satisfied;

[0102] In response to a parking regeneration signal emitted by the engine, if the parking regeneration signal is not greater than a preset slip threshold, performing parking regeneration;

[0103] If the idle state duration is less than the preset idle duration, and the vehicle speed information is greater than zero, determining that the vehicle enters a driving state;

[0104] The transmission control unit performs a delay shift and monitors the oil temperature information of the torque converter and the driving state in real time, and controls the state of the parking regeneration based on the oil temperature information of the torque converter.

[0105] In the present embodiment, when the vehicle speed information is greater than zero, it is determined that the vehicle enters a driving state; the transmission control unit performs a delay shift, the engine speed is increased, the engine enters a high-speed state, the combustion temperature is increased, the exhaust temperature is increased, and the driving condition is continuously monitored until the regeneration is completed.

[0106] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0107] The following is an embodiment of the vehicle DPF regeneration control device provided by the embodiment of the present disclosure, which belongs to the same inventive concept as the vehicle DPF regeneration control method of each of the above embodiments. Details not described in the embodiment of the vehicle DPF regeneration control device can be referred to the above embodiment of the vehicle DPF regeneration control method.

[0108] As shown in Figure 2 The device comprises:

[0109] The signal monitoring module is configured to monitor the engine parking regeneration signal.

[0110] The slip judgment module is configured to, in response to the parking regeneration signal sent by the engine control unit, judge whether the current torque converter slip is greater than a preset slip threshold.

[0111] The regeneration execution module is configured to execute the parking regeneration when the current torque converter slip is not greater than the preset slip threshold.

[0112] The oil temperature monitoring module is configured to monitor the oil temperature information of the torque converter in real time, and control the state of the parking regeneration based on the oil temperature information of the torque converter.

[0113] In some specific embodiments, when the vehicle is in parking regeneration, the transmission control unit receives the parking regeneration signal of the engine. When the parking regeneration signal is received, the transmission control unit judges whether the torque converter slip is greater than the set limit value. If it is higher than the set limit value, the parking regeneration is not allowed, which prevents the engine speed from being too high during parking regeneration, causing the torque converter slip to be too large, and the transmission oil temperature to abnormally change and burn the hardware such as clutch.

[0114] When the vehicle is in driving regeneration, the transmission control unit receives the driving regeneration signal of the engine. When the driving regeneration signal is received, the TCU automatically switches to the driving regeneration shift map to complete the driving regeneration as soon as possible under the premise of protecting the automatic transmission.

[0115] The embodiment also adds the temperature calculation function of the torque converter. When the oil temperature of the torque converter is too high, the torque limiting protection is performed, and the DPF regeneration is interrupted.

[0116] That is, when the vehicle is in the DPF regeneration state, the hydraulic automatic transmission control system calculates the temperature value of the torque converter. When the oil temperature of the torque converter is greater than the set temperature threshold, the temperature condition is triggered to limit the torque, and the DPF regeneration is terminated. This can effectively avoid the risk of damaging the automatic transmission when the hydraulic automatic transmission is loaded with a diesel engine DPF, prolong the service life of the product, and improve the user experience.

[0117] As shown in Figure 3The embodiment shown further provides a vehicle, comprising an engine control unit, a gearbox control unit and a particulate filter; the gearbox control unit is in communication connection with the engine control unit, and is used to implement the control method for protecting the gearbox during DPF regeneration of the vehicle.

[0118] Since the vehicle provided by the embodiment of the present application comprises the engine control unit, the gearbox control unit and the particulate filter which can be integrated with the control device for protecting the gearbox during DPF regeneration of the vehicle provided by the embodiment of the present application, and can execute the control method for protecting the gearbox during DPF regeneration of the vehicle provided by the embodiment of the present application, it can have the corresponding structure and features of the control method for protecting the gearbox during DPF regeneration of the vehicle provided by the embodiment of the present application, and can achieve the beneficial effects of the control method for protecting the gearbox during DPF regeneration of the vehicle provided by the embodiment of the present application, and the same parts can be referred to the description above.

[0119] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the control method for protecting the gearbox during DPF regeneration of the vehicle can be realized by electronic hardware, computer software or a combination of both, and in order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been described generally in the above description. Whether the functions are executed 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 the present application.

[0120] In the drawings of the control method and device for protecting the gearbox during DPF regeneration of the vehicle, the possible implementation architecture, functions and operations of the equipment, methods and computer program products according to various embodiments of the present disclosure are illustrated. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different orders than those noted in the drawings. For example, two blocks that are shown in succession can actually be executed substantially in parallel, and they can also be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be realized by a dedicated hardware-based system that executes the specified functions or operations, or can be realized by a combination of dedicated hardware and computer instructions.

[0121] In several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method can be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, another division manner can be used. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can also be electrical, mechanical or other forms of connection.

[0122] The embodiment further provides a storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps of the control method for protecting a transmission when a DPF of a vehicle is regenerated.

[0123] The storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples (non-exhaustive list) of the readable storage medium include an electrical connection having one or more wires, a portable disc, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0124] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for protecting a transmission during regeneration of a vehicle DPF, characterized by, The method comprises: S101: monitoring an engine parking regeneration signal; S102: in response to the parking regeneration signal sent by the engine control unit, determining whether the current torque converter slip is greater than a preset slip threshold value; S103: if not greater than the preset slip threshold value, performing parking regeneration; obtaining engine water temperature information, vehicle speed information and gear position information; determining whether the engine water temperature information, the vehicle speed information and the gear position information meet the parking regeneration condition; when the engine water temperature information is greater than a preset engine water temperature threshold value, the vehicle speed information is zero, and the gear position information is neutral, performing parking regeneration; In the method, during the parking regeneration process, the transmission control unit automatically switches to a driving regeneration shift map; If the vehicle speed information is zero, the vehicle is in an idle state; obtaining an idle state duration, and if the idle state duration is greater than a first preset idle duration, the parking regeneration condition is met; in response to the parking regeneration signal sent by the engine, if not greater than the preset slip threshold value, performing parking regeneration; If the idle state duration is less than the first preset idle duration, and when the vehicle speed information is greater than 0, it is determined that the vehicle enters a driving state; The transmission control unit performs a delay shift and real-time monitors the oil temperature information of the torque converter and the driving state, and controls the state of the parking regeneration based on the oil temperature information of the torque converter; S104: real-time monitoring the oil temperature information of the torque converter, and controlling the state of the parking regeneration based on the oil temperature information of the torque converter.

2. The control method of claim 1, wherein In the step S104, when the oil temperature information of the torque converter is higher than a preset oil temperature threshold value, the parking regeneration is stopped.

3. The control method of claim 1, wherein The step S102 further comprises: If the current torque converter slip is greater than the preset slip threshold value, parking regeneration is not performed.

4. The control method of claim 1 or 2, wherein The method further comprises: determining whether the carbon accumulation amount in the diesel particulate filter is greater than or equal to a preset carbon accumulation amount preset threshold value; If greater than or equal to the preset carbon accumulation amount preset threshold value, the process of monitoring the engine parking regeneration signal is started.

5. A control device for protecting a transmission during DPF regeneration in a vehicle, characterized in that: The device is used to implement the control method of claim 1 to 4; the device comprises: A signal monitoring module for monitoring the engine parking regeneration signal; A slip determination module for determining whether the current torque converter slip is greater than a preset slip threshold value in response to the parking regeneration signal sent by the engine control unit; A regeneration execution module for performing parking regeneration when the current torque converter slip is not greater than the preset slip threshold value; An oil temperature monitoring module for real-time monitoring the oil temperature information of the torque converter, and controlling the state of the parking regeneration based on the oil temperature information of the torque converter.

6. A vehicle characterized by comprising: Comprise: An engine control unit, a transmission control unit and a particulate filter; The transmission control unit is in communication connection with the engine control unit, and is used to implement the control method of claim 1 to 4.

7. A storage medium having stored thereon a computer program, characterized in that The computer program is executed by the processor to implement the steps of the control method of claim 1 to 4.

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