Vehicle low-temperature cold start control method, device and equipment and storage medium
By obtaining the relative speed of the engine and the current accumulated carbon accumulation coefficient, a low-temperature cold start control strategy is implemented to remove carbon accumulation, which solves the problem of engine cold start failure in low-temperature environments, and improves the vehicle's starting performance and vehicle use experience.
Patent Information
- Application Number
- CN202510138908.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2025-04-11
AI Technical Summary
In low temperature environments, the engine fails to start cold due to excessive carbon deposits, affecting the normal use of the vehicle.
By obtaining the relative speed of the engine and the current accumulated carbon accumulation coefficient, when the accumulated carbon accumulation coefficient reaches a certain threshold, a low-temperature cold start control strategy is implemented, including controlling the engine to operate at a preset speed to remove carbon accumulation.
It effectively solves the problem of low-temperature cold start failure due to excessive carbon deposits, and improves the vehicle's low-temperature start performance and user's car use experience.
Smart Images
Figure CN119801762A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of hybrid electric vehicles, and in particular to a vehicle low-temperature cold start control method, device, equipment and storage medium. Background Art
[0002] At present, new energy vehicles give priority to providing users with the ultimate performance experience, among which NVH performance is particularly outstanding. On-demand power generation and low-speed shutdown are both relatively mainstream control solutions. However, in the low temperature environment in winter, the fuel volatility is poor, and the viscosity of the cold engine oil increases, the internal resistance of the engine becomes larger, and the engine sprays more densely under the same output power. As the speed of the vehicle changes, the engine starts and stops frequently, resulting in incomplete combustion of the mixture. Working under this condition for a long time, the engine spark plug is very likely to produce carbon deposits, and the low-temperature starting performance is sharply weakened. In extreme cases, cold start failure may occur. Summary of the invention
[0003] In view of the above problems, the present application provides a vehicle low-temperature cold start control method, device, equipment and storage medium, which are used to solve the problem in the prior art that low-temperature cold start fails due to excessive carbon deposits, thereby affecting normal vehicle use.
[0004] According to one aspect of an embodiment of the present application, a vehicle low-temperature cold start control method is provided, the method comprising:
[0005] When the ambient temperature of the vehicle is lower than a preset temperature value, obtaining an engine relative speed based on an actual engine speed of the vehicle and a first preset engine speed, and obtaining a current accumulated carbon deposition coefficient of the vehicle based on the engine relative speed;
[0006] Determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposit coefficient, the low-temperature cold start control strategy comprising controlling the engine to run at a second preset speed to remove carbon deposits;
[0007] Among them, the carbon deposition coefficient is used to characterize the amount of carbon deposition generated during the time period when the relative speed of the engine is continuously less than the first threshold value, the current cumulative carbon deposition coefficient is the sum of the carbon deposition coefficients within the target time period, and the first preset speed has a corresponding relationship with the second preset speed.
[0008] In an optional manner, the acquiring the relative speed of the engine based on the actual speed of the engine of the vehicle and the first preset speed further includes:
[0009] The engine relative speed is determined based on a difference between the actual speed and the first preset speed.
[0010] In an optional manner, the obtaining the current cumulative carbon deposition coefficient of the vehicle based on the relative speed of the engine further includes:
[0011] Determine the time period from the time when the cumulative carbon deposit coefficient of the vehicle was last cleared to the current time as the target time period, and determine the sub-time period in the target time period when the relative speed of the engine is less than the first threshold as the first time period;
[0012] According to the relative speed of the engine of the vehicle in the target time period, the relative speed of the engine in each first time period is integrated and accumulated to obtain the current cumulative carbon deposition coefficient of the vehicle.
[0013] In an optional manner, the relative speed of the engine within the target time period includes: the real-time relative speed of the engine at each moment within the target time period; the method further includes:
[0014] According to the difference between the real-time actual speed of the engine of the vehicle at any moment within the target time period and the first preset speed, the real-time relative speed of the engine of the vehicle at any moment is obtained, until the real-time relative speed of the engine of the vehicle at every moment within the target time period is obtained; wherein, the first preset speed is: the lowest speed for achieving carbon cleaning under the actual lowest power used at low temperature of the engine.
[0015] In an optional manner, determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposition coefficient further includes:
[0016] When the current accumulated carbon deposition coefficient is greater than or equal to a second threshold, the engine of the vehicle is controlled to execute a low-temperature cold start control strategy.
[0017] In an optional manner, the method further includes:
[0018] In the target time period, a sub-time period in which the relative speed of the engine is greater than the first threshold is determined as a second time period, and the relative speed of the engine in each second time period is integrated and accumulated to obtain a current cumulative carbon removal coefficient of the vehicle;
[0019] When the current cumulative carbon removal coefficient is greater than or equal to a third threshold, the current cumulative carbon deposition coefficient of the target time period is cleared to zero, and the current time is determined as a starting time point of a next target time period.
[0020] In an optional manner, the method further includes:
[0021] When the current accumulated carbon deposition coefficient of the target time period is cleared to zero and when the engine executes the low-temperature cold start control strategy, the engine is controlled to stop executing the low-temperature cold start control strategy.
[0022] According to another aspect of an embodiment of the present application, a low-temperature cold start control device for a vehicle is provided, comprising:
[0023] an acquisition module, configured to acquire an engine relative speed based on an actual engine speed of the vehicle and a first preset engine speed when the ambient temperature of the vehicle is lower than a preset temperature value, and acquire a current accumulated carbon deposition coefficient of the vehicle based on the engine relative speed;
[0024] A first control module determines whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposit coefficient, wherein the low-temperature cold start control strategy includes controlling the engine to run at a second preset speed to remove carbon deposits;
[0025] Among them, the carbon deposition coefficient is used to characterize the amount of carbon deposition generated during the time period when the relative speed of the engine is continuously less than the first threshold value, the current cumulative carbon deposition coefficient is the sum of the carbon deposition coefficients within the target time period, and the first preset speed has a corresponding relationship with the second preset speed.
[0026] According to another aspect of an embodiment of the present application, a vehicle low-temperature cold start control device is provided, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;
[0027] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations of the vehicle low-temperature cold start control method of the present invention.
[0028] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a vehicle low-temperature cold start control device / equipment to perform operations such as the vehicle low-temperature cold start control method of the present invention.
[0029] The embodiment of the present application obtains the current cumulative carbon deposition coefficient of the vehicle when the ambient temperature of the vehicle is lower than a preset temperature value; and determines whether to perform a low-temperature cold start control on the vehicle based on the size of the current cumulative carbon deposition coefficient. This can solve the problem of low-temperature cold start failure caused by excessive carbon deposition, thereby improving vehicle performance and user experience.
[0030] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:
[0032] Figure 1 A schematic flow chart of a first embodiment of a vehicle low-temperature cold start control method provided by the present application is shown;
[0033] Figure 2 A schematic flow chart of a second embodiment of a vehicle low-temperature cold start control method provided by the present application is shown;
[0034] Figure 3 A schematic diagram of the division of the target time period is shown;
[0035] Figure 4 A schematic flow chart of a third embodiment of a vehicle low-temperature cold start control method provided by the present application is shown;
[0036] Figure 5 A schematic structural diagram of a first embodiment of a low-temperature cold start control device for a vehicle provided by the present application is shown;
[0037] Figure 6 A schematic structural diagram of an embodiment of a vehicle low-temperature cold start control device provided in the present application is shown. DETAILED DESCRIPTION
[0038] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.
[0039] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.
[0040] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.
[0041] The term "multiple" as used in this application refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.
[0042] At present, new energy vehicles give priority to providing users with the ultimate performance experience, among which NVH performance is particularly outstanding. On-demand power generation and low-speed shutdown are both relatively mainstream control solutions. However, in the low temperature environment in winter, the volatility of fuel is poor, and the viscosity of cold engine oil increases, the internal resistance of the engine becomes larger, and the engine sprays more densely under the same output power. As the speed of the vehicle changes, the engine starts and stops frequently, resulting in incomplete combustion of the mixture. Working under this condition for a long time, the engine spark plug is very likely to produce carbon deposits, and the low-temperature starting performance is sharply weakened. In extreme cases, cold start failure may occur. Based on this:
[0043] Figure 1 The flowchart of the first embodiment of the vehicle low temperature cold start control method provided by the present application is shown, and the method is executed by the vehicle low temperature cold start control device. Figure 1 As shown, the method comprises the following steps:
[0044] Step S110: When the ambient temperature of the vehicle is lower than a preset temperature value, the engine relative speed is obtained based on the actual engine speed of the vehicle and a first preset speed, and the current accumulated carbon deposition coefficient of the vehicle is obtained based on the engine relative speed.
[0045] Among them, the vehicle is a hybrid vehicle by default. The ambient temperature of the vehicle can be collected in real time through the temperature sensor set on the vehicle. The preset temperature value is set to -15°C by default, and can also be set according to actual conditions. There is no limit here. The carbon deposition coefficient is used to characterize the amount of carbon deposition generated during the time period when the relative speed of the engine is continuously less than the first threshold. The amount of carbon deposition is related to the spark plug of the engine. The spark plug is very prone to carbon deposition when the engine works under low temperature conditions for a long time. The current cumulative carbon deposition coefficient is the sum of the carbon deposition coefficients within the target time period. The first threshold is set to 0 by default, and can also be adjusted according to actual conditions.
[0046] Step S120: determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposit coefficient, wherein the low-temperature cold start control strategy includes controlling the engine to run at a second preset speed to remove carbon deposits.
[0047] The first preset speed and the second preset speed have a corresponding relationship. For example, the first preset speed is equal to the second preset speed, and both are 1500 rpm (can also be set according to actual conditions); or, there is a functional corresponding relationship between the first preset speed and the second preset speed, and the specific relationship is not limited here.
[0048] The technical solution of this embodiment can solve the problem of low-temperature cold start failure caused by excessive carbon deposits, thereby improving vehicle performance and user experience.
[0049] Figure 2 The flowchart of the second embodiment of the vehicle low temperature cold start control method provided by the present application is shown, and the method is executed by the vehicle low temperature cold start control device. Figure 2 As shown, the method comprises the following steps:
[0050] Step S210: When the ambient temperature of the vehicle is lower than a preset temperature value, the engine relative speed is determined based on the difference between the actual speed and the first preset speed; the time period from the time when the vehicle's cumulative carbon deposit coefficient was last cleared to the current time is determined as the target time period, and the sub-time period in the target time period in which the engine relative speed is less than the first threshold is determined as the first time period.
[0051] The target time period is the time period from the last time the accumulated carbon deposition coefficient of the vehicle was cleared to the current time. The relative speed of the engine within the target time period includes the real-time relative speed of the engine at each moment within the target time period.
[0052] It should be noted that in determining the judgment conditions for the first time period, in addition to judging whether the engine relative speed is less than the first threshold, it can also be judged whether the engine water temperature is less than 70°C, and the sub-time period in which the engine relative speed is less than the first threshold and the engine water temperature is less than 70°C is determined as the first time period.
[0053] In step S210, obtaining the relative engine speed of the vehicle within the target time period further includes:
[0054] According to the difference between the real-time actual engine speed of the vehicle at any moment within the target time period and the first preset speed, the real-time relative engine speed of the vehicle at any moment is obtained, until the real-time relative engine speed of the vehicle at every moment within the target time period is obtained.
[0055] The first preset speed is the lowest speed for achieving carbon removal under the lowest power actually used at low temperature of the engine. The real-time speed of the engine at different times within the target time period may be different.
[0056] Step S220: According to the relative engine speed of the vehicle in the target time period, the relative engine speed in each first time period is integrated and accumulated to obtain the current cumulative carbon deposition coefficient of the vehicle.
[0057] Among them, Figure 3 As shown, assuming that the start time of a first time period is T0 and the end time is T1, and since the relative speed of the engine in the first time period is always less than 0, the formula for integrating the relative speed of the engine in the first time period is: δ n is the relative speed of the engine, δ n =n1-n r , n1 is the real-time engine speed, n r The first preset speed. The current accumulated carbon deposition coefficient n represents the number of first time periods within the target time period.
[0058] Step S230: determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposition coefficient.
[0059] The technical solution of this embodiment further calculates the current accumulated carbon deposit coefficient based on the engine relative speed, and thus determines whether to execute a low-temperature cold start control strategy for the vehicle based on the size of the current accumulated carbon deposit coefficient. This can solve the problem of low-temperature cold start failure caused by excessive carbon deposits, and improve vehicle performance and user experience.
[0060] Based on the second embodiment, the method further includes:
[0061] Within the target time period, a sub-time period in which the engine relative speed is greater than the first threshold is determined as a second time period, and the engine relative speed of each second time period is integrated and accumulated to obtain a current cumulative carbon removal coefficient of the vehicle.
[0062] Assuming that the start time of a second time period is T1 and the end time is T2, and since the relative speed of the engine in the second time period is always greater than 0, the formula for integrating the relative speed of the engine in the second time period is: δ n is the relative speed of the engine. Current cumulative carbon removal coefficient m represents the number of second time periods within the target time period.
[0063] When the current cumulative carbon removal coefficient is greater than or equal to a third threshold, the current cumulative carbon deposition coefficient of the target time period is cleared to zero, and the current time is determined as a starting time point of a next target time period.
[0064] The third threshold value can be set according to actual needs and is not limited here. If the current cumulative carbon removal coefficient is greater than or equal to the third threshold value, a new cycle is entered for judgment. The target time period includes at least one driving cycle, and a driving cycle includes at least one first time period and at least one second time period.
[0065] Based on the second embodiment, the method further includes:
[0066] When the current accumulated carbon deposition coefficient of the target time period is cleared to zero and when the engine executes the low-temperature cold start control strategy, the engine is controlled to stop executing the low-temperature cold start control strategy.
[0067] Among them, when the current cumulative carbon deposition coefficient of the target time period is cleared and the engine executes the low-temperature cold start control strategy, a stop command is sent to the engine to control the engine to stop executing the low-temperature cold start control strategy. When the current cumulative carbon deposition coefficient of the target time period is cleared and the engine does not execute the low-temperature cold start control strategy, it directly enters the next target time period for subsequent judgment.
[0068] Figure 4 The flowchart of the third embodiment of the vehicle low temperature cold start control method provided by the present application is shown, and the method is executed by the vehicle low temperature cold start control device. Figure 4 As shown, the method comprises the following steps:
[0069] Step S310: When the ambient temperature of the vehicle is lower than a preset temperature value, the engine relative speed is obtained based on the actual engine speed of the vehicle and a first preset speed, and the current accumulated carbon deposition coefficient of the vehicle is obtained based on the engine relative speed.
[0070] Step S320: When the current accumulated carbon deposition coefficient is greater than or equal to a second threshold, the engine of the vehicle is controlled to execute a low-temperature cold start control strategy.
[0071] Among them, the low-temperature cold start control strategy is: the engine's minimum speed reaches the target speed value and the torque reaches the target torque value. The target speed value is set to 1500rpm by default, and the target torque value is set to 32Nm by default. The second threshold can be adjusted according to actual needs and is not limited here. If the current accumulated carbon deposition coefficient is greater than or equal to the second threshold, it means that the engine is at risk of starting failure at this time, and it is necessary to control the vehicle's engine to execute the low-temperature cold start control strategy.
[0072] It should be noted that when the current accumulated carbon deposition coefficient is less than the second threshold value, the engine of the vehicle is controlled not to execute the low-temperature cold start control strategy. After the vehicle engine is started, except for special modes such as vehicle power-off, towing, car washing, and maintenance, the shutdown prohibition request is responded to first to keep the engine in operation.
[0073] The technical solution of this embodiment further controls the engine to execute a low-temperature cold start control strategy according to the relationship between the current cumulative carbon deposit coefficient and the threshold, thereby solving the problem of low-temperature cold start failure caused by excessive carbon deposits, and improving vehicle performance and user experience.
[0074] Figure 5 The schematic diagram of the structure of the embodiment of the vehicle low temperature cold start control device provided by the present application is shown. Figure 5 As shown, the device 400 includes: an acquisition module 410 and a first control module 420 .
[0075] The acquisition module 410 is used to acquire the engine relative speed based on the actual speed of the engine of the vehicle and the first preset speed when the ambient temperature of the vehicle is lower than the preset temperature value, and acquire the current accumulated carbon deposition coefficient of the vehicle based on the engine relative speed;
[0076] A first control module 420 is used to determine whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposit coefficient, wherein the low-temperature cold start control strategy includes controlling the engine to run at a second preset speed to remove carbon deposits;
[0077] Among them, the carbon deposition coefficient is used to characterize the amount of carbon deposition generated during the time period when the relative speed of the engine is continuously less than the first threshold value, the current cumulative carbon deposition coefficient is the sum of the carbon deposition coefficients within the target time period, and the first preset speed has a corresponding relationship with the second preset speed.
[0078] In an optional manner, the acquisition module 410 is specifically used to:
[0079] The engine relative speed is determined based on a difference between the actual speed and the first preset speed.
[0080] In an optional manner, the acquisition module 410 is specifically used to:
[0081] Determine the time period from the time when the cumulative carbon deposit coefficient of the vehicle was last cleared to the current time as the target time period, and determine the sub-time period in the target time period when the relative speed of the engine is less than the first threshold as the first time period;
[0082] According to the relative speed of the engine of the vehicle in the target time period, the relative speed of the engine in each first time period is integrated and accumulated to obtain the current cumulative carbon deposition coefficient of the vehicle.
[0083] In an optional manner, the relative speed of the engine within the target time period includes: the real-time relative speed of the engine at each moment within the target time period; the acquisition module 410 is further specifically used for:
[0084] According to the difference between the real-time actual speed of the engine of the vehicle at any moment within the target time period and the first preset speed, the real-time relative speed of the engine of the vehicle at any moment is obtained, until the real-time relative speed of the engine of the vehicle at every moment within the target time period is obtained; wherein, the first preset speed is: the lowest speed for achieving carbon cleaning under the actual lowest power used at low temperature of the engine.
[0085] In an optional manner, the first control module 420 is specifically configured to:
[0086] When the current accumulated carbon deposition coefficient is greater than or equal to a second threshold, the engine of the vehicle is controlled to execute a low-temperature cold start control strategy.
[0087] In an optional manner, the device 400 further includes: a processing module; the processing module is used to:
[0088] Within the target time period, determining a sub-time period in which the engine relative speed is greater than the first threshold as a second time period, and performing integral calculation and accumulation on the engine relative speed in each second time period to obtain a current cumulative carbon removal coefficient of the vehicle;
[0089] When the current cumulative carbon removal coefficient is greater than or equal to a third threshold, the current cumulative carbon deposition coefficient of the target time period is cleared to zero, and the current time is determined as a starting time point of a next target time period.
[0090] In an optional manner, the device 400 further includes: a second control module; the second control module is used to:
[0091] When the current accumulated carbon deposition coefficient of the target time period is cleared to zero and when the engine executes the low-temperature cold start control strategy, the engine is controlled to stop executing the low-temperature cold start control strategy.
[0092] The technical solution of this embodiment can solve the problem of low-temperature cold start failure caused by excessive carbon deposits, thereby improving vehicle performance and user experience.
[0093] It should be noted that the vehicle low-temperature cold start control device provided in the above embodiment and the vehicle low-temperature cold start control method provided in the above embodiment belong to the same concept, and the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment and will not be repeated here.
[0094] Figure 6 A structural schematic diagram of an embodiment of a vehicle low-temperature cold start control device provided by the present application is shown, which shows a structural schematic diagram of a computer system suitable for implementing the vehicle low-temperature cold start control device of the embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the vehicle low-temperature cold start control device.
[0095] See also Figure 6 As shown, the vehicle low-temperature cold start control device includes: a controller; a memory for storing one or more programs, and when the one or more programs are executed by the controller, the above-mentioned vehicle low-temperature cold start control method is executed.
[0096] Please continue reading Figure 6 As shown, the computer system 500 of the vehicle low temperature cold start control device includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage part 508 to the random access memory (RAM) 503, such as executing the method in the above embodiment. In RAM 503, various programs and data required for system operation are also stored. CPU 501, ROM 502 and RAM 503 are connected to each other through bus 504. Input / output (I / O) interface 505 is also connected to bus 504.
[0097] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read therefrom is installed into the storage section 508 as needed.
[0098] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 509, and / or installed from a removable medium 511. When the computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are executed.
[0099] Another aspect of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the vehicle low-temperature cold start control method described above is implemented. The computer-readable storage medium may be included in the vehicle low-temperature cold start control device described in the above embodiment, or may exist independently without being assembled into the electronic device.
[0100] Another aspect of the present application also provides a computer program product or computer program, which includes at least one executable instruction. When the executable instruction is run on a vehicle low-temperature cold start control device / equipment, the vehicle low-temperature cold start control device / equipment executes the vehicle low-temperature cold start control method as described above.
[0101] The executable instructions can be specifically used to enable the vehicle low-temperature cold start control device / apparatus to perform the following operations:
[0102] When the ambient temperature of the vehicle is lower than a preset temperature value, obtaining an engine relative speed based on an actual engine speed of the vehicle and a first preset engine speed, and obtaining a current accumulated carbon deposition coefficient of the vehicle based on the engine relative speed;
[0103] Determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposit coefficient, the low-temperature cold start control strategy comprising controlling the engine to run at a second preset speed to remove carbon deposits;
[0104] Among them, the carbon deposition coefficient is used to characterize the amount of carbon deposition generated during the time period when the relative speed of the engine is continuously less than the first threshold value, the current cumulative carbon deposition coefficient is the sum of the carbon deposition coefficients within the target time period, and the first preset speed has a corresponding relationship with the second preset speed.
[0105] In an optional manner, the acquiring the relative speed of the engine based on the actual speed of the engine of the vehicle and the first preset speed further includes:
[0106] The engine relative speed is determined based on a difference between the actual speed and the first preset speed.
[0107] In an optional manner, the obtaining the current cumulative carbon deposition coefficient of the vehicle based on the relative speed of the engine further includes:
[0108] Determine the time period from the time when the cumulative carbon deposit coefficient of the vehicle was last cleared to the current time as the target time period, and determine the sub-time period in the target time period when the relative speed of the engine is less than the first threshold as the first time period;
[0109] According to the relative speed of the engine of the vehicle in the target time period, the relative speed of the engine in each first time period is integrated and accumulated to obtain the current cumulative carbon deposition coefficient of the vehicle.
[0110] In an optional manner, the relative speed of the engine within the target time period includes: the real-time relative speed of the engine at each moment within the target time period; the method further includes:
[0111] According to the difference between the real-time actual speed of the engine of the vehicle at any moment within the target time period and the first preset speed, the real-time relative speed of the engine of the vehicle at any moment is obtained, until the real-time relative speed of the engine of the vehicle at every moment within the target time period is obtained; wherein, the first preset speed is: the lowest speed for achieving carbon cleaning under the actual lowest power used at low temperature of the engine.
[0112] In an optional manner, determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposition coefficient further includes:
[0113] When the current accumulated carbon deposition coefficient is greater than or equal to a second threshold, the engine of the vehicle is controlled to execute a low-temperature cold start control strategy.
[0114] In an optional manner, the method further includes:
[0115] Within the target time period, determining a sub-time period in which the engine relative speed is greater than the first threshold as a second time period, and performing integral calculation and accumulation on the engine relative speed in each second time period to obtain a current cumulative carbon removal coefficient of the vehicle;
[0116] When the current cumulative carbon removal coefficient is greater than or equal to a third threshold, the current cumulative carbon deposition coefficient of the target time period is cleared to zero, and the current time is determined as a starting time point of a next target time period.
[0117] In an optional manner, the method further includes:
[0118] When the current accumulated carbon deposition coefficient of the target time period is cleared to zero and when the engine executes the low-temperature cold start control strategy, the engine is controlled to stop executing the low-temperature cold start control strategy.
[0119] The technical solution of this embodiment can solve the problem of low-temperature cold start failure caused by excessive carbon deposits, thereby improving vehicle performance and user experience.
[0120] It should be noted that the computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as a part of a carrier wave, wherein a computer-readable computer program is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.
[0121] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.
[0122] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.
[0123] According to one aspect of an embodiment of the present application, a computer system is also provided, including a central processing unit (CPU), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) or a program loaded from a storage portion into a random access memory (RAM), such as executing the method in the above embodiment. In RAM, various programs and data required for system operation are also stored. CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.
[0124] The following components are connected to the I / O interface: an input part including a keyboard, a mouse, etc.; an output part including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage part including a hard disk, etc.; and a communication part including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface as needed. Removable media, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., are installed on the drive as needed so that the computer program read therefrom is installed into the storage part as needed.
[0125] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.
Claims
1. A vehicle low temperature cold start control method, characterized in that: The method comprises: When the ambient temperature of the vehicle is lower than a preset temperature value, obtaining an engine relative speed based on an actual engine speed of the vehicle and a first preset engine speed, and obtaining a current accumulated carbon deposition coefficient of the vehicle based on the engine relative speed; Determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposit coefficient, the low-temperature cold start control strategy comprising controlling the engine to run at a second preset speed to remove carbon deposits; Among them, the carbon deposition coefficient is used to characterize the amount of carbon deposition generated during the time period when the relative speed of the engine is continuously less than the first threshold value, the current cumulative carbon deposition coefficient is the sum of the carbon deposition coefficients within the target time period, and the first preset speed has a corresponding relationship with the second preset speed.
2. The method according to claim 1, characterized in that The obtaining of the relative engine speed based on the actual engine speed of the vehicle and the first preset engine speed further comprises: The engine relative speed is determined based on a difference between the actual speed and the first preset speed.
3. The method according to claim 2, characterized in that The obtaining of the current accumulated carbon deposition coefficient of the vehicle based on the relative speed of the engine further comprises: Determine the time period from the time when the cumulative carbon deposit coefficient of the vehicle was last cleared to the current time as the target time period, and determine the sub-time period in the target time period when the relative speed of the engine is less than the first threshold as the first time period; According to the relative speed of the engine of the vehicle in the target time period, the relative speed of the engine in each first time period is integrated and accumulated to obtain the current cumulative carbon deposition coefficient of the vehicle.
4. The method according to claim 3, characterized in that The relative speed of the engine within the target time period includes: the real-time relative speed of the engine at each moment within the target time period; the method further includes: According to the difference between the real-time actual speed of the engine of the vehicle at any moment within the target time period and the first preset speed, the real-time relative speed of the engine of the vehicle at any moment is obtained, until the real-time relative speed of the engine of the vehicle at every moment within the target time period is obtained; wherein, the first preset speed is: the lowest speed for achieving carbon cleaning under the actual lowest power used at low temperature of the engine.
5. The method according to claim 1, characterized in that The determining whether to execute a low-temperature cold start control strategy for the vehicle according to the current accumulated carbon deposition coefficient further includes: When the current accumulated carbon deposition coefficient is greater than or equal to a second threshold, the engine of the vehicle is controlled to execute a low-temperature cold start control strategy.
6. The method according to claim 3, characterized in that The method further comprises: Within the target time period, determining a sub-time period in which the engine relative speed is greater than the first threshold as a second time period, and performing integral calculation and accumulation on the engine relative speed in each second time period to obtain a current cumulative carbon removal coefficient of the vehicle; When the current cumulative carbon removal coefficient is greater than or equal to a third threshold, the current cumulative carbon deposition coefficient of the target time period is cleared to zero, and the current time is determined as a starting time point of a next target time period.
7. The method according to claim 6, characterized in that The method further comprises: When the current accumulated carbon deposition coefficient of the target time period is cleared to zero and when the engine executes the low-temperature cold start control strategy, the engine is controlled to stop executing the low-temperature cold start control strategy.
8. A low-temperature cold start control device for a vehicle, characterized in that: The device comprises: an acquisition module, configured to acquire an engine relative speed based on an actual engine speed of the vehicle and a first preset engine speed when the ambient temperature of the vehicle is lower than a preset temperature value, and acquire a current accumulated carbon deposition coefficient of the vehicle based on the engine relative speed; a first control module, determining, according to the current accumulated carbon deposit coefficient, whether to execute a low-temperature cold start control strategy for the vehicle, the low-temperature cold start control strategy comprising controlling the engine to run at a second preset speed to remove carbon deposits; Among them, the carbon deposition coefficient is used to characterize the amount of carbon deposition generated during the time period when the relative speed of the engine is continuously less than the first threshold value, the current cumulative carbon deposition coefficient is the sum of the carbon deposition coefficients within the target time period, and the first preset speed has a corresponding relationship with the second preset speed.
9. A vehicle low temperature cold start control device, characterized in that: include: Controller; The memory is used to store one or more programs. When the one or more programs are executed by the controller, the controller implements the vehicle low-temperature cold start control method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that: The storage medium stores at least one executable instruction. When the executable instruction is executed on the vehicle low-temperature cold start control device / equipment, the vehicle low-temperature cold start control device / equipment performs the operation of the vehicle low-temperature cold start control method as described in any one of claims 1-7.