Transmission creep start control method and device, electronic equipment and storage medium

Abstract

The application discloses a transmission creep starting control method and device, electronic equipment and a storage medium. The method comprises the following steps: when the vehicle is in a creep starting working condition, acquiring actual working condition parameters of the vehicle; the actual working condition parameters refer to vehicle operating parameters acquired in the creep starting working condition; acquiring reference working condition parameters of the vehicle; wherein, the reference working condition parameters refer to upper limit values of the vehicle operating parameters preset in the creep starting working condition; based on the actual working condition parameters and the reference working condition parameters, determining a transmission torque increase request of the vehicle, so that the vehicle starts to creep by increasing the torque of the engine. Through the analysis of the acquired actual working condition parameters and the reference working condition parameters, the purpose of accurately controlling the vehicle to start smoothly is achieved, and the problem that the vehicle starts unstably due to the excessively large torque increase request value of the transmission, thereby causing damage to personal safety, is solved.

Description

Technical Field

[0001] This invention relates to the technical field of automatic transmissions, and more particularly to a method, apparatus, electronic device, and storage medium for controlling transmission crawl start. Background Technology

[0002] In currently used automatic transmissions, sending a creeping torque increase request to boost the engine torque is a crucial part of controlling the vehicle's smooth start. The condition where the driver does not press the brake or accelerator pedals to start the vehicle is called a creeping start.

[0003] In existing technologies, the torque increase request is sent to start the vehicle by determining whether it exceeds the requested torque limit. If it does not exceed the limit, the torque increase request is sent to start the vehicle. However, this can still result in the engine speed increasing due to excessive torque, causing the vehicle to accelerate suddenly and fail to start smoothly. This sudden start may also cause injury to the driver. Therefore, it is crucial to accurately control the vehicle's start by sending torque increase requests. Summary of the Invention

[0004] This invention provides a transmission creep start control method, device, electronic device, and storage medium to solve the problem that the vehicle start is unstable due to the transmission sending an excessive torque increase request value, which may cause harm to personal safety.

[0005] According to one aspect of the present invention, a transmission creep start control method is provided, the method comprising:

[0006] When the vehicle is in a crawling start-up condition, the actual operating parameters of the vehicle are obtained; wherein, the actual operating parameters refer to the vehicle operating parameters obtained under the crawling start-up condition, including engine speed, engine torque request value and actual acceleration.

[0007] Obtain the reference operating parameters of the vehicle; wherein, the reference operating parameters refer to the upper limit values ​​of the vehicle operating parameters preset under the creep start condition, including the engine creep speed limit, the engine creep torque limit, and the creep acceleration limit.

[0008] Based on the actual operating parameters and the reference operating parameters, the vehicle's transmission is instructed to send a torque increase request so that the vehicle can start crawling by increasing the engine torque.

[0009] According to another aspect of the present invention, a transmission creep start control device is provided, the device comprising:

[0010] The first parameter acquisition module is used to acquire the actual operating parameters of the vehicle when the vehicle is in a crawling start-up condition; wherein, the actual operating parameters refer to the vehicle operating parameters acquired under the crawling start-up condition, including engine speed, engine torque request value and actual acceleration.

[0011] The second parameter acquisition module is used to acquire the reference operating condition parameters of the vehicle; wherein, the reference operating condition parameters refer to the upper limit values ​​of the vehicle operating parameters under the pre-set crawling start condition, including the engine crawling speed limit, the engine crawling torque limit, and the crawling acceleration limit.

[0012] The control module is used to determine, based on the actual operating parameters and the reference operating parameters, whether the vehicle's transmission should send a torque increase request so that the vehicle can start crawling by increasing the engine torque.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] At least one processor; and

[0015] A memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the transmission crawl start control method according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the transmission crawl start control method according to any embodiment of the present invention.

[0018] The technical solution of this invention involves acquiring the vehicle's actual operating parameters when the vehicle is in a crawling start-up condition. These actual operating parameters refer to the vehicle's operating parameters acquired during the crawling start-up process. Simultaneously, reference operating parameters are acquired, which are pre-set upper limits for the vehicle's operating parameters during the crawling start-up process. Finally, based on the actual and reference operating parameters, a torque increase request is sent by the vehicle's transmission to enable the vehicle to perform a crawling start by increasing the engine's torque. This application, through analysis of the acquired actual and reference operating parameters, achieves accurate control for a smooth vehicle start, solving the problem of unstable vehicle start-up caused by excessively high torque increase requests from the transmission, which could lead to harm to personal safety.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of a transmission creep start control method provided by an embodiment of the present invention;

[0022] Figure 2 This is a flowchart of a transmission creep start control method provided by an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of a transmission creep start control device according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of an electronic device that implements the transmission crawl start control method of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "actual," "reference," "first," and "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] Example 1

[0028] Figure 1 This is a flowchart illustrating a transmission creep start control method provided in an embodiment of the present invention. This embodiment is applicable to situations where, during a creep start condition, the system analyzes various vehicle parameters to determine whether to control vehicle start-up based on a torque increase request sent by the transmission. This method can be executed by a transmission creep start control device, which can be implemented in hardware and / or software. This transmission creep start control device can be configured in an electronic device that has a transmission creep start control method. Figure 1 As shown, the method includes:

[0029] S110. When the vehicle is in a crawling start-up condition, obtain the actual operating parameters of the vehicle.

[0030] The actual operating parameters refer to the vehicle operating parameters obtained under the crawling start condition, including engine speed, engine torque request value, and actual acceleration.

[0031] In this scheme, when the vehicle is in a crawling start condition, the clutch pressure is controlled to ensure that the clutch speed follows a target speed trajectory, thereby controlling the vehicle speed trajectory. During the control process, to ensure stable engine speed, the transmission controller unit sends a torque increase request for the crawling start condition to the engine control unit; and when the vehicle is in a crawling start condition, depending on the vehicle's driving mode, it may automatically select 1st or 2nd gear for starting. For example, comfort mode selects 1st gear for starting, while snow mode selects 2nd gear to prevent wheel slippage during start-up.

[0032] Optionally, it is necessary to further determine whether the vehicle is in a crawling start condition. The specific process is as follows: obtain the vehicle's current speed, current throttle value, and braking status; if the current speed is less than or equal to the crawling speed limit, and the current throttle value is less than or equal to the crawling throttle limit, and the brake is released, then the vehicle is determined to be in a crawling start condition. The crawling throttle limit and crawling speed limit need to be set according to the actual vehicle conditions. For example, the crawling speed limit can be set to a range of 0-10 km / h, and the crawling throttle limit to 0-3%.

[0033] This technical solution compares the current vehicle speed and current throttle value with the creep speed limit and creep throttle limit, respectively, to accurately determine whether the vehicle is in a creep start condition, so as to further determine how to start the vehicle.

[0034] S120. Obtain the reference operating parameters of the vehicle.

[0035] The reference operating condition parameters refer to the upper limits of vehicle operating parameters preset under the creep start condition, including engine creep speed limit, engine creep torque limit, and creep acceleration limit.

[0036] Specifically, the engine creep speed limit, engine creep torque limit, and creep acceleration limit can be set according to the actual conditions of the vehicle. For example, the engine creep speed limit can be set to 600-1200 rpm, the engine creep torque limit to 0-100 Nm, and the vehicle creep acceleration limit to 0-2.5 m / s². 2 The crawling speed limit can be related to the gear, for example, the speed limit for 1st gear is 6 km / h, and the speed limit for 2nd gear is 9 km / h.

[0037] S130. Based on the actual operating parameters and the reference operating parameters, determine that the vehicle's transmission sends a torque increase request so that the vehicle can start crawling by increasing the engine torque.

[0038] The torque increase request may include the engine torque increase request value sent by the transmission control unit to the engine. Once the torque increase request is met, the vehicle can control the engine to increase torque according to the engine torque increase request value to achieve a smooth crawl start.

[0039] Specifically, after obtaining the vehicle's actual operating parameters and reference operating parameters, the difference between the actual operating parameters and the reference operating parameters can be compared with a preset error value to accurately determine whether the transmission control unit can send a torque increase request to the engine control unit. After accurately determining that the vehicle's transmission control unit can send a torque increase request, the engine adjusts the torque to control the vehicle's start-up. Alternatively, the actual operating parameters can be compared with the reference operating parameters, and based on the comparison result, it can be accurately determined that the transmission control unit can send a torque increase request, and then the engine adjusts the torque to control the vehicle's start-up.

[0040] The technical solution of this invention involves acquiring the vehicle's actual operating parameters when the vehicle is in a crawling start-up condition. These actual operating parameters refer to the vehicle's operating parameters acquired during the crawling start-up process. Simultaneously, reference operating parameters are acquired, which are pre-set upper limits for the vehicle's operating parameters during the crawling start-up process. Finally, based on the actual and reference operating parameters, a torque increase request is determined for the vehicle's transmission to initiate a crawling start by increasing the engine's torque. This application, through analysis of the acquired actual and reference operating parameters, achieves accurate control for a smooth vehicle start, solving the problem of unstable vehicle start-up caused by excessively high torque increase requests from the transmission, which could lead to harm to personal safety.

[0041] Example 2

[0042] Figure 2 This is a flowchart of a transmission creep start control method provided in an embodiment of the present invention. This embodiment provides a further detailed description of S130 in the above embodiment. Figure 2 As shown, the method includes:

[0043] S210. When the vehicle is in a crawling start-up condition, obtain the vehicle's actual operating parameters and reference operating parameters.

[0044] Specifically, the system acquires the vehicle's current speed and throttle position. If these conditions are met, the vehicle is determined to be in a crawling start-up state, and the system can then obtain the vehicle's actual operating parameters and reference operating parameters. If the current speed and throttle position do not meet the preset conditions, the transmission will not send a torque increase request. The preset conditions are: the current speed is less than or equal to the crawling speed limit, the current throttle position is less than or equal to the crawling throttle limit, and the brake is released.

[0045] S220. Compare the actual operating parameters with the reference operating parameters.

[0046] Specifically, comparing actual operating parameters with reference operating parameters involves at least the following three scenarios:

[0047] The first method: When the actual operating parameter is engine speed, and the reference operating parameter is the engine creep speed limit, determine whether the engine speed is less than or equal to the engine creep speed limit. If so, determine that the engine speed meets the condition for the transmission to send a torque increase request, and use the engine speed being less than or equal to the engine creep speed limit as the first comparison result; if not, the vehicle's transmission will not send a torque increase request. This method determines the engine speed because a specific gear ratio (1st or 2nd gear) is used for starting, and limiting the engine speed can effectively limit the vehicle speed.

[0048] The second method: When the actual operating parameter is the engine torque increase request value, and the reference operating parameter is the engine creep torque increase limit value; determine whether the engine torque increase request value is less than or equal to the engine creep torque increase limit value; if so, determine that the engine torque increase request value meets the condition for the transmission to send a torque increase request, and use the engine torque increase request value being less than or equal to the engine creep torque increase limit value as the second comparison result; if not, the vehicle's transmission does not send a torque increase request. This solution's determination of the engine torque increase request value can prevent the engine from receiving an excessively large torque increase request value, causing the vehicle's actual acceleration to exceed the driver's expected acceleration.

[0049] The third method: When the actual operating parameter is the actual acceleration, and the reference operating parameter is the creep acceleration limit, determine whether the actual acceleration is less than or equal to the creep acceleration limit. If so, determine that the actual acceleration meets the condition for the transmission to send a torque increase request, and use the actual acceleration being less than or equal to the creep acceleration limit as the third comparison result; if not, the vehicle's transmission will not send a torque increase request. This solution can detect when the actual acceleration exceeds the vehicle acceleration calculated based on the clutch target trajectory engagement ratio, ensuring driving safety.

[0050] S230. Based on the comparison results, determine that the vehicle's transmission sends a torque increase request so that the vehicle can start crawling by increasing the engine torque.

[0051] Specifically, S220 mentions three comparison results: the first comparison result, the second comparison result, and the third comparison result. If the vehicle simultaneously meets all three comparison results, it is determined that the torque increase request sent by the transmission control unit satisfies the conditions for a smooth vehicle start. The engine control unit then receives the torque increase request and adjusts the engine torque to control the vehicle's start. If the vehicle does not meet any of the three comparison results, the transmission does not send a torque increase request, and the engine does not adjust the torque to control the vehicle's start.

[0052] The technical solution of this invention involves acquiring the actual operating parameters and reference operating parameters of the vehicle when it is in a crawling start condition. Then, the actual operating parameters are compared with the reference operating parameters. Based on the comparison result, the transmission of the vehicle is determined to send a torque increase request so that the vehicle can start crawling by increasing the engine torque. This achieves the purpose of accurately controlling the smooth start of the vehicle and solves the problem that the vehicle start is unstable due to the excessive torque increase request value sent by the transmission, which may cause damage to personal safety.

[0053] Example 3

[0054] Figure 3 This is a schematic diagram of a transmission creep start control device provided in an embodiment of the present invention. Figure 3 As shown, the device includes:

[0055] The first parameter acquisition module 310 is used to acquire the actual operating parameters of the vehicle when the vehicle is in a crawling start-up condition; the actual operating parameters refer to the vehicle operating parameters acquired under the crawling start-up condition, including engine speed, engine torque request value and actual acceleration.

[0056] The second parameter acquisition module 320 is used to acquire the reference operating condition parameters of the vehicle; wherein, the reference operating condition parameters refer to the upper limit values ​​of the vehicle operating parameters under the pre-set crawling start condition, including the engine crawling speed limit, the engine crawling torque limit, and the crawling acceleration limit.

[0057] The control module 330 is used to determine, based on the actual operating parameters and the reference operating parameters, whether the vehicle's transmission should send a torque increase request so that the vehicle can start crawling by increasing the engine torque.

[0058] Optionally, the first parameter acquisition module includes a working condition determination unit, specifically used for:

[0059] Obtain the vehicle's current speed and current throttle value;

[0060] If the current vehicle speed is less than or equal to the crawling speed limit, the current throttle value is less than or equal to the crawling throttle limit, and the brake is released, then the vehicle is determined to be in a crawling start-up condition.

[0061] Optionally, the control module includes:

[0062] The comparison unit is used to compare the actual operating condition parameters with the reference operating condition parameters;

[0063] A torque boost control unit is used to determine, based on the comparison results, that the vehicle's transmission sends a torque boost request so that the vehicle can perform a crawl start by increasing the engine torque.

[0064] Optionally, when the actual operating condition parameter is the engine speed, and the reference operating condition parameter is the engine creep speed limit; the comparison unit includes a first judgment unit, specifically used for:

[0065] Determine whether the engine speed is less than or equal to the engine creep speed limit;

[0066] If so, the engine speed is determined to meet the condition for the transmission to send a torque increase request, and the engine speed being less than or equal to the engine creep speed limit is taken as the first comparison result;

[0067] If not, the vehicle's transmission does not send a torque increase request.

[0068] Optionally, when the actual operating condition parameter is the engine torque increase request value, the reference operating condition parameter is the engine creep torque increase limit value; the comparison unit includes a second judgment unit, specifically used for:

[0069] Determine whether the engine torque increase request value is less than or equal to the engine creep torque increase limit value;

[0070] If so, the engine torque increase request value is determined to meet the conditions for the transmission to send a torque increase request, and the engine torque increase request value being less than or equal to the engine creep torque increase limit value is taken as the second comparison result.

[0071] If not, the vehicle's transmission does not send a torque increase request.

[0072] Optionally, when the actual operating condition parameter is the actual acceleration, the reference operating condition parameter is the crawling acceleration limit; the comparison unit includes a third judgment unit, specifically used for:

[0073] Determine whether the actual acceleration is less than or equal to the crawling acceleration limit;

[0074] If so, the actual acceleration is determined to meet the conditions for the transmission to send a torque increase request, and the actual acceleration being less than or equal to the creep acceleration limit is taken as the third comparison result;

[0075] If not, the vehicle's transmission does not send a torque increase request.

[0076] Optional, torque control unit, specifically used for:

[0077] If the vehicle simultaneously meets the first comparison result, the second comparison result, and the third comparison result, then it is determined that the vehicle's transmission sends a torque increase request to enable the vehicle to perform a crawl start by increasing the engine torque.

[0078] The transmission creep start control device provided in the embodiments of the present invention can execute the transmission creep start control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0079] The acquisition, storage, use, and processing of data in this application comply with relevant national laws and regulations and do not violate public order and good morals.

[0080] Example 4

[0081] According to embodiments of this disclosure, this disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0082] Figure 4 A schematic diagram of an electronic device that can be used to implement the transmission crawl start control method of embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0083] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0084] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0085] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the transmission crawl start control method.

[0086] In some embodiments, the transmission creep start control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the transmission creep start control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the transmission creep start control method by any other suitable means (e.g., by means of firmware).

[0087] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0088] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0089] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0090] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0091] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0092] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0093] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0094] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for controlling a transmission's creep start, characterized in that, include: When the vehicle is in a crawling start-up condition, the actual operating parameters of the vehicle are obtained; wherein, the actual operating parameters refer to the vehicle operating parameters obtained under the crawling start-up condition, including engine speed, engine torque request value and actual acceleration. Obtain the reference operating parameters of the vehicle; wherein, the reference operating parameters refer to the upper limit values ​​of the vehicle operating parameters preset under the creep start condition, including the engine creep speed limit, the engine creep torque limit, and the creep acceleration limit. Based on the actual operating parameters and the reference operating parameters, it is determined that the vehicle's transmission sends a torque increase request so that the vehicle can start crawling by increasing the engine torque. Based on the actual operating parameters and the reference operating parameters, determining that the vehicle's transmission sends a torque increase request to enable the vehicle to perform a crawl start by increasing the engine torque includes: Compare the actual operating parameters with the reference operating parameters; Based on the comparison results, it is determined that the vehicle's transmission sends a torque increase request to enable the vehicle to perform a crawl start by increasing the engine torque.

2. The method according to claim 1, characterized in that, When the vehicle is in a crawl start condition, including: Obtain the vehicle's current speed and current throttle value; If the current vehicle speed is less than or equal to the crawling speed limit, the current throttle value is less than or equal to the crawling throttle limit, and the brake is released, then the vehicle is determined to be in a crawling start-up condition.

3. The method according to claim 1, characterized in that, When the actual operating condition parameter is the engine speed, the reference operating condition parameter is the engine creep speed limit; Comparing the actual operating parameters with the reference operating parameters includes: Determine whether the engine speed is less than or equal to the engine creep speed limit; If so, the engine speed is determined to meet the condition for the transmission to send a torque increase request, and the engine speed being less than or equal to the engine creep speed limit is taken as the first comparison result; If not, the vehicle transmission does not send a torque increase request.

4. The method according to claim 1, characterized in that, When the actual operating condition parameter is the engine torque increase request value, the reference operating condition parameter is the engine creep torque increase limit value; Comparing the actual operating parameters with the reference operating parameters includes: Determine whether the engine torque increase request value is less than or equal to the engine creep torque increase limit value; If so, the engine torque increase request value is determined to meet the conditions for the transmission to send a torque increase request, and the engine torque increase request value being less than or equal to the engine creep torque increase limit value is taken as the second comparison result. If not, the vehicle's transmission will not send a torque increase request.

5. The method according to claim 1, characterized in that, When the actual operating condition parameter is the actual acceleration, the reference operating condition parameter is the crawling acceleration limit; Comparing the actual operating parameters with the reference operating parameters includes: Determine whether the actual acceleration is less than or equal to the crawling acceleration limit; If so, the actual acceleration is determined to meet the conditions for the transmission to send a torque increase request, and the actual acceleration being less than or equal to the creep acceleration limit is taken as the third comparison result; If not, the vehicle's transmission does not send a torque increase request.

6. The method according to claim 1, characterized in that, Based on the comparison results, it is determined that the vehicle's transmission sends a torque increase request to enable the vehicle to perform a crawl start by increasing the engine torque, including: If the vehicle simultaneously meets the first comparison result, the second comparison result, and the third comparison result, then it is determined that the vehicle's transmission sends a torque increase request to enable the vehicle to perform a crawl start by increasing the engine torque.

7. A transmission creep start control device, characterized in that, include: The first parameter acquisition module is used to acquire the actual operating parameters of the vehicle when the vehicle is in a crawling start-up condition; wherein, the actual operating parameters refer to the vehicle operating parameters acquired under the crawling start-up condition, including engine speed, engine torque request value and actual acceleration. The second parameter acquisition module is used to acquire the reference operating condition parameters of the vehicle; wherein, the reference operating condition parameters refer to the upper limit values ​​of the vehicle operating parameters under the pre-set crawling start condition, including the engine crawling speed limit, the engine crawling torque limit, and the crawling acceleration limit. The control module is used to determine, based on the actual operating parameters and the reference operating parameters, whether the vehicle's transmission should send a torque increase request so that the vehicle can start crawling by increasing the engine torque. The control module includes: The comparison unit is used to compare the actual operating condition parameters with the reference operating condition parameters; A torque boost control unit is used to determine, based on the comparison results, that the vehicle's transmission sends a torque boost request so that the vehicle can perform a crawl start by increasing the engine torque.

8. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the transmission crawl start control method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the transmission crawl start control method according to any one of claims 1-6.

Images