Vehicle starting control method and device, vehicle, and storage medium

Abstract

The application relates to a starting control method and device of a vehicle, the vehicle and a storage medium, wherein the method comprises the following steps: judging whether the vehicle has a low-temperature starting risk based on an ambient temperature of the vehicle; if the vehicle has the low-temperature starting risk, acquiring a current running parameter of the vehicle when the vehicle is in a target running mode; determining a risk factor of low-temperature starting misfire vibration of the vehicle based on the current running parameter, and determining a risk level corresponding to the risk factor; and controlling the vehicle to perform a corresponding starting inhibition action according to the risk level, so as to start the engine of the vehicle. Therefore, the technical problem that in the prior art, only single judgment of the temperature cannot accurately determine the risk, the control action for the cold start is single, the control action cannot adapt to various environmental conditions, and a great safety hazard exists is solved.

Description

Technical Field

[0001] This application relates to the field of vehicle start control technology, and in particular to a vehicle start control method, device, vehicle, and storage medium. Background Technology

[0002] When the vehicle's engine is started in cold weather, there is an issue with idling vibration. This is because the hydraulic tappet takes a long time to settle, which cannot compensate for the thermal expansion of the exhaust valve in a short time, resulting in the valve not closing properly and air leakage in the combustion chamber. This leads to misfires in one or more cylinders during cold starts.

[0003] To address the aforementioned issues, related technologies employ real-time monitoring of the internal temperature of the engine's main oil passage and the activation or deactivation of the heating device based on the monitored temperature to prevent misfires in one or more cylinders during cold starts.

[0004] However, the factors that cause vehicle misfires and vibrations during cold starts are complex and diverse. Relying solely on temperature is insufficient for accurate risk assessment. Furthermore, the limited control actions for cold starts are unsuitable for varying environmental conditions. For instance, in extremely low temperatures, the preset heating power is insufficient to effectively raise the engine oil temperature to the target value, posing a significant safety hazard that urgently needs improvement. Summary of the Invention

[0005] This application provides a vehicle start-up control method, device, vehicle, and storage medium to solve the technical problems in related technologies where relying solely on temperature makes it difficult to accurately assess risks, and the control actions for cold starts are limited and cannot adapt to changing environmental conditions, posing significant safety hazards.

[0006] The first aspect of this application provides a vehicle start-up control method, comprising the following steps: determining whether the vehicle has a risk of low-temperature start-up based on the ambient temperature of the vehicle's operation; if the vehicle has the risk of low-temperature start-up, then, when the vehicle is in a target operating mode, acquiring the vehicle's current operating parameters; determining a risk factor for low-temperature start-up misfire based on the current operating parameters, and determining a risk level corresponding to the risk factor; and controlling the vehicle to perform a corresponding start-up suppression action according to the risk level to start the vehicle's engine.

[0007] Based on the above-mentioned technical means, this application embodiment can determine the risk factors of cold start misfire and vibration of the vehicle based on the current operating parameters of the vehicle when there is a risk of cold start. This allows for a comprehensive assessment of the cold start risk, resulting in a more accurate assessment result. The risk level corresponding to the risk factor is then determined, and the vehicle is controlled to perform corresponding start suppression actions based on the risk level. This more effectively addresses the risks present in the current cold start condition, improves the engine start safety of the vehicle, and enhances the user's driving experience.

[0008] Optionally, in one embodiment of this application, determining the risk factor for low-temperature start-up misfire and shaking of the vehicle based on the current operating parameters includes: obtaining the current oil temperature, current oil viscosity, and engine downtime of the vehicle based on the current operating parameters; and assigning corresponding influence coefficients to the current oil temperature, the current oil viscosity, and the downtime to obtain the risk factor.

[0009] Based on the above technical means, the embodiments of this application can comprehensively determine the engine oil temperature, engine oil viscosity and engine downtime to obtain a comprehensive risk factor and avoid erroneous judgments caused by a single numerical value.

[0010] Optionally, in one embodiment of this application, before assigning corresponding influence coefficients to the current oil temperature, the current oil viscosity, and the downtime, the method further includes: obtaining sample operating parameters of the vehicle and the influence of the sample operating parameters on the vehicle's misfire vibration phenomenon; assigning corresponding influence coefficients to the sample oil temperature, sample oil viscosity, and sample downtime in the sample operating parameters based on the influence; clustering the sample operating parameters and the influence coefficients to divide the influence of the sample operating parameters on the misfire vibration phenomenon into multiple coefficient intervals; generating a risk factor influence coefficient table based on the multiple coefficient intervals, and matching the corresponding influence coefficients in the influence coefficient table using the current oil temperature, current oil viscosity, and downtime as indexes.

[0011] Based on the above technical means, the embodiments of this application can summarize and classify data through a large amount of sample data and the impact of sample data on vehicle fire start-up and shaking phenomenon, so as to obtain multiple intervals that can be summarized into the same group, and then generate an influence coefficient table, so that in actual use, the influence coefficient can be matched according to the actual value.

[0012] Optionally, in one embodiment of this application, controlling the vehicle to perform a corresponding start-up suppression action based on the risk level to start the vehicle's engine includes: determining the vehicle's engine speed limit, oil flow valve opening limit, and oil heating power limit based on the risk level; and using the engine speed limit, oil flow valve opening limit, and oil heating power limit to restrict the vehicle until the oil temperature reaches a preset temperature threshold.

[0013] Based on the above technical means, the embodiments of this application can determine multiple start-up suppression actions according to the risk level, such as limiting engine speed, oil heating power, etc., to compensate for the exhaust valve thermal expansion causing valve not to close tightly, combustion chamber leakage, and resulting in misfire of one or more cylinders during cold start.

[0014] Optionally, in one embodiment of this application, before controlling the vehicle to perform the corresponding start-up suppression action according to the risk level, the method further includes: acquiring the vehicle's communication information within a preset time period; determining whether the start-up suppression action meets a preset update condition based on the communication information; if the preset update condition is met, updating the start-up suppression action based on the communication information, and executing the updated start-up suppression action.

[0015] Based on the above technical means, the embodiments of this application can update the start suppression action according to the vehicle system upgrade or user-defined method, so as to improve and maintain the start suppression action in response to low temperature start-up misfire vibration.

[0016] A second aspect of this application provides a vehicle start-up control device, comprising: a judgment module, configured to determine whether the vehicle has a risk of low-temperature start-up based on the ambient temperature of the vehicle's operation; a first acquisition module, configured to acquire the current operating parameters of the vehicle when the vehicle is in a target operating mode and the low-temperature start-up risk exists; a determination module, configured to determine a risk factor for low-temperature start-up misfire based on the current operating parameters, and determine a risk level corresponding to the risk factor; and a control module, configured to control the vehicle to perform a corresponding start-up suppression action according to the risk level, so as to start the vehicle's engine.

[0017] Optionally, in one embodiment of this application, the determining module includes: an acquisition unit, configured to obtain the current oil temperature, current oil viscosity, and engine downtime of the vehicle based on the current operating parameters; and an assignment unit, configured to assign corresponding influence coefficients to the current oil temperature, the current oil viscosity, and the downtime, respectively, to obtain the risk factor.

[0018] Optionally, in one embodiment of this application, it further includes: a second acquisition module, used to acquire sample operating parameters of the vehicle and the influence of the sample operating parameters on the vehicle's misfire and vibration phenomenon; an assignment module, used to assign corresponding influence coefficients to the sample oil temperature, sample oil viscosity, and sample downtime in the sample operating parameters based on the influence; a division module, used to cluster the sample operating parameters and the influence coefficients to divide the influence of the sample operating parameters on the misfire and vibration phenomenon into multiple coefficient intervals; and a matching module, used to generate a risk factor influence coefficient table based on the multiple coefficient intervals, and match the corresponding influence coefficients in the influence coefficient table using the current oil temperature, the current oil viscosity, and the downtime as indexes.

[0019] Optionally, in one embodiment of this application, the control module includes: a determining unit, configured to determine the engine speed limit, oil flow valve opening limit, and oil heating power limit of the vehicle based on the risk level; and a control unit, configured to limit the vehicle using the engine speed limit, the oil flow valve opening limit, and the oil heating power limit until the oil temperature reaches a preset temperature threshold.

[0020] Optionally, in one embodiment of this application, it further includes: a third acquisition module, used to acquire the communication information of the vehicle within a preset time period; a judgment module, used to determine whether the start-up suppression action meets a preset update condition based on the communication information; and an update module, used to update the start-up suppression action based on the communication information and execute the updated start-up suppression action if the preset update condition is met.

[0021] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle start-up control method as described in the above embodiments.

[0022] A fourth aspect of this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform the vehicle start-up control method as described in the above embodiments.

[0023] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, implements the vehicle start-up control method described above.

[0024] This application's embodiments can, when a vehicle faces the risk of low-temperature starting, determine the risk factors for misfires and vibrations during low-temperature starting based on the vehicle's current operating parameters. This comprehensive assessment of cold start risk yields a more accurate result, identifies the risk level corresponding to each risk factor, and controls the vehicle to perform appropriate start-suppression actions based on the risk level. This more effectively addresses the risks associated with current cold start conditions, improves engine starting safety, and enhances the user's driving experience. Therefore, it solves the technical problems in related technologies where relying solely on temperature for accurate risk assessment is insufficient, and the limited control actions for cold starts are unsuitable for varying environmental conditions, posing significant safety hazards.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 This is a schematic diagram of an oil circulation system with PTC heating function according to an embodiment of this application;

[0028] Figure 2 This is a flowchart of a vehicle start-up control method according to an embodiment of this application;

[0029] Figure 3 This is a flowchart of a vehicle start-up control method according to an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the structure of a vehicle start control device according to an embodiment of this application;

[0031] Figure 5 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application.

[0032] Among them, 1-oil pan, 2-flow valve, 3-oil heating box, 4-PTC, 5-second oil temperature sensor, 6-first oil temperature sensor, 7-controller, 8-actuator, 9-wire, 10-control line; 11-vehicle start control device, 100-judgment module, 200-first acquisition module, 300-determination module, 400-control module; 501-memory, 502-processor, 503-communication interface. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0034] The following description, with reference to the accompanying drawings, describes a vehicle starting control method, apparatus, vehicle, and storage medium according to embodiments of this application. Addressing the technical problems mentioned in the background art, where relying solely on temperature for accurate risk assessment is insufficient, and the control actions for cold starts are limited and unsuitable for varying environmental conditions, posing significant safety hazards, this application provides a vehicle starting control method. This method, when a vehicle faces the risk of low-temperature starting, determines the risk factor for low-temperature start-up misfire and vibration based on the vehicle's current operating parameters. This allows for a comprehensive assessment of the cold start risk, yielding a more accurate result. Furthermore, it determines the risk level corresponding to the risk factor and controls the vehicle to perform appropriate start-up suppression actions based on the risk level. This more effectively addresses the risks associated with current cold start conditions, improves engine starting safety, and enhances the user's driving experience. Therefore, this method solves the technical problems in related technologies where relying solely on temperature for accurate risk assessment and the limited control actions for cold starts are unsuitable for varying environmental conditions, posing significant safety hazards.

[0035] Understandably, in low-temperature environments, the engine experiences poor lubrication due to low oil viscosity, and moving parts also have larger gaps due to thermal expansion and contraction. Furthermore, hybrid vehicles may experience prolonged periods without starting, leading to misfires and vibrations during cold starts in cold regions, severely impacting NVH (Noise, Vibration, and Harshness) quality.

[0036] This application embodiment addresses the problem of slow hydraulic tappet settlement due to low engine oil viscosity during cold starts in cold regions. This slow settlement leads to incomplete exhaust valve closure, combustion chamber leakage, and unstable engine combustion, resulting in abnormal phenomena such as engine vibration during cold starts. The technical solution used in this application embodiment involves the vehicle controller identifying the engine's cold start condition and preheating the engine oil using a PTC oil heater before starting the engine. The start command is executed only after the engine oil temperature reaches the target temperature.

[0037] First, the embodiments of this application can be based on, as follows Figure 1 The oil circulation system with PTC heating function shown is a method for controlling vehicle start-up.

[0038] like Figure 1As shown, the oil circulation system with PTC heating function includes: oil pan 1, flow valve 2, oil heating box 3, PTC 4, first oil temperature sensor 5, second oil temperature sensor 6, controller 7, actuator 8, wire 9 and control line 10.

[0039] In actual operation, the flow valve 2 can be adjusted according to the actual risk level. The first oil temperature sensor 5 and the second oil temperature sensor 6 can monitor the temperature before and after oil heating. The PCT4 is installed in the oil heating box 3 to heat the oil. The controller 7 can issue a control signal for starting suppression action according to the risk level of the vehicle to control the actuator 8 to perform the action.

[0040] Specifically, Figure 2 This is a flowchart illustrating a vehicle start-up control method provided in an embodiment of this application.

[0041] like Figure 2 As shown, the vehicle's start-up control method includes the following steps:

[0042] In step S201, based on the ambient temperature of the vehicle's operation, it is determined whether the vehicle has a risk of starting at low temperatures.

[0043] Understandably, the engine is the heart of a car. Inside the engine are many metal surfaces that rub against each other. These parts move at high speeds and in harsh environments. When the vehicle is started in cold weather, the engine oil has not yet circulated sufficiently to all parts of the engine, resulting in insufficient lubrication. This can cause the engine to vibrate during startup.

[0044] In vehicles, the hydraulic tappets take a long time to settle, which cannot compensate for the thermal expansion of the exhaust valve in a short time, resulting in the valve not closing tightly and the combustion chamber leaking. This can lead to misfires in one or more cylinders during cold starts, which can affect the user's actual driving experience. To avoid the above problems, this application embodiment first obtains the ambient temperature of the vehicle to determine whether the vehicle is in a cold start condition, i.e., whether there is a risk of starting at low temperatures.

[0045] For example, if the vehicle temperature is within the temperature range that activates the low-temperature start-up misfire and vibration judgment condition, then the low-temperature start-up misfire and vibration judgment condition is activated, meaning there is a risk of low-temperature start-up; conversely, if the vehicle temperature is outside the range that the current ambient temperature is unlikely to cause low-temperature start-up misfire, then the low-temperature start-up misfire and vibration judgment condition is not activated, meaning there is no risk of low-temperature start-up.

[0046] In this embodiment of the application, the judgment condition for low-temperature start-up misfire is a preset value after testing: According to a large number of tests, when the ambient temperature of the vehicle is between -35℃ and 0℃, there is a risk of low-temperature start-up. It should be noted that the ambient temperature range where there is a risk of low-temperature start-up can be set according to different regional environments and different vehicle models.

[0047] When the low-temperature start-up misfire and vibration judgment condition is activated, the embodiments of this application can perform operations to obtain the vehicle's operating parameters and vehicle operating mode.

[0048] In step S202, if there is a risk of the vehicle starting at low temperatures, the current operating parameters of the vehicle are obtained while the vehicle is in the target operating mode.

[0049] As one possible approach, current operating parameters can be obtained through sensors and control units installed within the vehicle itself.

[0050] For example, the engine oil temperature can be obtained through a temperature sensor installed in the engine's main oil passage; the vehicle's current SOC, mileage, average speed, etc., can be obtained through the vehicle's control unit.

[0051] The vehicle's operating mode can be determined based on the operating parameters of the vehicle's engine, generator, drive motor, clutch, and other components.

[0052] Taking hybrid vehicles as an example, when the vehicle speed is 0 km / h and the engine and generator are in a stopped state, the vehicle operating mode is determined to be EV parking mode; when the vehicle speed is 0 km / h and the engine is running and the generator is generating, the vehicle operating mode is determined to be parking and generating mode; when the vehicle engine and generator are stopped, the drive motor is in a driving / regenerative braking state, and the clutch is disengaged, the vehicle operating mode is determined to be pure electric mode; if the engine is running, the generator is generating, the drive motor is in a driving / regenerative braking state, and the clutch is disengaged, the vehicle operating mode is determined to be series mode; if the engine is running, the generator is in a following state, the drive motor is in a driving / regenerative braking state, and the clutch is engaged, the vehicle operating mode is determined to be parallel mode.

[0053] Since the low-temperature start-up risk occurs during the engine cold start phase, the prerequisite condition should be the engine not starting condition. Therefore, the target operating modes are EV parking mode and pure electric mode.

[0054] For gasoline-powered vehicles, the risk of starting in cold weather can occur in any cold start scenario. In this case, the vehicle's template operating mode is the start mode for the first engine start after parking.

[0055] In step S203, the risk factors for vehicle start-up misfire and shaking due to low temperature are determined based on the current operating parameters, and the risk level corresponding to the risk factors is determined.

[0056] In this embodiment, the risk factor for low-temperature start-up misfire is the risk factor that causes low-temperature start-up misfire. The risk level is the level at which misfire occurs, including but not limited to low risk, medium risk, and high risk levels. The low-temperature misfire risk factor of the vehicle is determined based on the vehicle's current operating parameters. The risk level is determined based on the risk factor and a preset risk level range.

[0057] Optionally, in one embodiment of this application, determining the risk factors for vehicle start-up misfire based on current operating parameters includes: obtaining the vehicle's current oil temperature, current oil viscosity, and engine downtime based on the current operating parameters; and assigning corresponding influence coefficients to the current oil temperature, current oil viscosity, and downtime to obtain the risk factors.

[0058] In some embodiments, risk factors may include the current oil temperature Toil, oil viscosity ψ, oil supply pressure P, and hydraulic tappet drain clearance K. Since the hydraulic tappet drain clearance K is proportional to the downtime, the embodiments of this application can make a comprehensive judgment on risk factors based on the current oil temperature, current oil viscosity, and engine downtime.

[0059] In this embodiment, the actual values ​​of current oil temperature, current oil viscosity, and engine downtime can be obtained based on the current operating parameters. The above values ​​are then correlated and assigned to obtain the corresponding influence coefficients of current oil temperature, current oil viscosity, and downtime. These influence coefficients are then superimposed to obtain the risk factor.

[0060] The correlation or mapping relationship between engine oil temperature, engine oil viscosity, engine downtime and influence coefficient can be set by those skilled in the art, and no specific restrictions are imposed here.

[0061] Optionally, in one embodiment of this application, before assigning corresponding influence coefficients to the current oil temperature, current oil viscosity, and downtime, the method further includes: obtaining sample operating parameters of the vehicle and the influence of the sample operating parameters on the vehicle's misfire vibration phenomenon; assigning corresponding influence coefficients to the sample oil temperature, sample oil viscosity, and sample downtime in the sample operating parameters based on the influence; clustering the sample operating parameters and influence coefficients to divide the influence of the sample operating parameters on the misfire vibration phenomenon into multiple coefficient intervals; generating an influence coefficient table of risk factors based on the multiple coefficient intervals, and matching the corresponding influence coefficients in the influence coefficient table using the current oil temperature, current oil viscosity, and downtime as indexes.

[0062] In other embodiments, the relationship between oil temperature, oil viscosity, engine downtime, and influence coefficients can be determined using a large amount of sample data.

[0063] The impact of three operating conditions—downtime less than 1 hour, downtime between 1 and 3 hours, and downtime greater than 3 hours—on the hydraulic tappet clearance was verified under different ambient temperatures. Extensive experiments were conducted in a low-temperature chamber to verify the effects of different ambient temperatures, different oil types, different oil supply pressures, and different downtime on the low-temperature cold start misfire vibration phenomenon. The influence coefficients of the risk factors are shown in Table 1. Table 1 is the influence coefficient table.

[0064] Table 1

[0065]

[0066]

[0067] For example, when the engine oil temperature is below -35℃, the influence coefficient of high-viscosity engine oil versus low-viscosity engine oil is between 1.5 and 1.4, the influence coefficient of low oil supply pressure versus high oil supply pressure is between 1.15 and 1.1, and the influence coefficient of downtime is between 1.1 and 1.05. Assuming the current main oil passage oil temperature is below -35℃, high-viscosity engine oil is being used, low oil supply pressure is being applied, and more than 3 hours have passed since the last start-up, then the influence coefficient for this condition is:

[0068] 1.5 + 1.15 + 1.15 = 3.8.

[0069] The risk level of low-temperature start-up fire and vibration is determined based on the weighting of risk factors. For example, the relationship between risk level and risk factors can be shown in Table 2, which is a risk level judgment table.

[0070] Table 2

[0071] EV parking conditions Less than 3.2 ≥3.2，＜3.4 ≥3.4 Pure electric driving conditions Less than 3.2 ≥3.2，＜3.4 ≥3.4

[0072] In step S204, the vehicle is controlled to perform a corresponding start-suppression action according to the risk level in order to start the vehicle's engine.

[0073] Taking hybrid vehicles as an example, this application embodiment can determine a low-temperature start-up misfire suppression strategy, i.e., a start-up suppression action, based on the current vehicle operating mode (EV parking, pure electric mode) and the corresponding risk level of the vehicle (low risk level, medium risk level, and high risk level). For example, if the vehicle operating mode is pure electric mode and the corresponding risk level is high risk, then the low-temperature start-up misfire suppression strategy for the vehicle is determined to be the response strategy corresponding to the high risk of pure electric mode.

[0074] Optionally, in one embodiment of this application, controlling the vehicle to perform a corresponding start-up suppression action based on the risk level to start the vehicle's engine includes: determining the vehicle's engine speed limit, oil flow valve opening limit, and oil heating power limit based on the risk level; and using the engine speed limit, oil flow valve opening limit, and oil heating power limit to restrict the vehicle until the oil temperature reaches a preset temperature threshold.

[0075] Taking hybrid vehicles as an example, when the vehicle is in EV parking or pure electric operation mode, the corresponding low-temperature start-up misfire suppression strategy, i.e., the start-up suppression actions, include:

[0076] If the vehicle's risk factor level is low, an electric heater located inside the oil pan is used for heating, the generator drives the engine to run at a first preset speed, the oil flow valve operates at a first preset flow value, the oil heating device PTC operates at a first preset power, and the oil flow valve and oil electric heater are turned off when the vehicle reaches the preset low temperature start-up misfire vibration suppression condition.

[0077] If the vehicle's risk factor level is medium risk, an electric heater located inside the oil pan is used for heating, the generator drives the engine to run at the second preset speed, the oil flow valve operates at the second preset flow value, the oil heating device PTC operates at the second preset power, and the oil flow valve and oil electric heater are turned off when the vehicle reaches the preset low temperature start-up misfire vibration suppression condition.

[0078] If the vehicle's risk factor level is high risk, an electric heater located inside the oil pan will be used for heating. The generator will drive the engine to run at the third preset speed, the oil flow valve will operate at the third preset flow value, the oil heating device PTC will operate at the third preset power, and the oil flow valve and oil electric heater will be turned off when the vehicle reaches the preset low temperature start-up misfire vibration suppression condition.

[0079] The generator drives the engine to the preset speed, and the engine injects fuel and ignites to complete the start-up.

[0080] The first preset rotation speed, the second preset rotation speed, the third preset rotation speed, the first preset flow rate, the second preset flow rate, the third preset flow rate, the first preset power, the second preset power, and the third preset power can be set by those skilled in the art according to the actual situation.

[0081] For example, as shown in Table 3, which is a comparison table of risk levels and initiation inhibition actions.

[0082] Table 3

[0083]

[0084] Optionally, in one embodiment of this application, before controlling the vehicle to perform the corresponding start-up suppression action according to the risk level, the method further includes: obtaining the vehicle's communication information within a preset time period; determining whether the start-up suppression action meets the preset update conditions based on the communication information; if the preset update conditions are met, updating the start-up suppression action based on the communication information, and executing the updated start-up suppression action.

[0085] Low-temperature start-up misfire and vibration response strategies can be pre-set based on experience for different risk levels corresponding to different vehicle operating modes. These strategies can be improved and maintained through vehicle system upgrades or user customization.

[0086] Furthermore, when the vehicle starts its engine, the embodiments of this application can determine whether the engine starts normally, i.e., whether misfire occurs or whether there is vibration.

[0087] If the system can start normally, but a misfire or minor vibration occurs, this application embodiment can record the startup suppression action, risk factors, and risk level for subsequent investigation of the cause.

[0088] If the engine fails to start normally, a complete misfire may have occurred. In this case, the embodiments of this application can attempt a second start suppression action. If the engine still fails to start normally, the vehicle is prohibited from starting and an alarm signal is generated for subsequent maintenance.

[0089] Combination Figure 3 As shown, the working principle of the vehicle start-up control method of this application embodiment is explained in detail with reference to one embodiment.

[0090] like Figure 3 As shown, taking a hybrid vehicle as an example, the embodiments of this application may include the following steps:

[0091] Step S301: Determine whether the vehicle's engine is working to determine if there is a risk of starting in low temperature. If the engine is working, proceed to step S303; otherwise, proceed to step S302.

[0092] In step S302, if the engine is not running, determine that the vehicle is in the target operating condition, namely EV parking condition or pure electric condition.

[0093] Step S303: If the engine is running, continue driving normally.

[0094] Step S304: Determine whether there is a risk of low-temperature start-up based on the vehicle's operating environment temperature. If there is no risk, proceed to step S303; otherwise, proceed to step S305.

[0095] Step S305: Determine the risk factor based on the vehicle's current operating parameters, and determine the risk level based on the risk factor. The current operating parameters can be obtained through the vehicle's sensors.

[0096] Risk factors are the risk factors that may cause misfires during low-temperature start-up. Risk levels are the levels that may cause misfire vibrations, including but not limited to low-risk, medium-risk, and high-risk levels. The low-temperature misfire vibration risk factors for the vehicle are determined based on its operating parameters.

[0097] Step S306: Determine the initiation of suppression actions based on the risk level.

[0098] This application embodiment can determine a low-temperature start-up misfire suppression strategy, i.e., a start-up suppression action, based on the current vehicle operating mode (EV parking, pure electric mode) and the corresponding risk level of the vehicle (low risk level, medium risk level, and high risk level). For example, if the vehicle operating mode is pure electric mode and the corresponding risk level is high risk, then the low-temperature start-up misfire suppression strategy for the vehicle is determined to be the response strategy corresponding to the high risk of pure electric mode.

[0099] Low-temperature start-up misfire and vibration response strategies can be pre-set based on experience for different risk levels corresponding to different vehicle operating modes. These strategies can be improved and maintained through vehicle system upgrades or user customization.

[0100] Step S307: Determine whether the engine oil temperature has reached the target temperature, such as whether it is >0℃. If the target temperature has been reached, proceed to step S308; otherwise, proceed to step S305.

[0101] Step S308: Exit the oil heating mode and start the engine.

[0102] The vehicle start-up control method proposed in this application can determine the risk factors for cold-start misfire and vibration based on the vehicle's current operating parameters when there is a risk of cold-starting. This allows for a comprehensive assessment of the cold-start risk, resulting in a more accurate judgment. The method also determines the risk level corresponding to the risk factor and controls the vehicle to perform appropriate start-up suppression actions based on the risk level. This more effectively addresses the risks associated with cold-starting conditions, improves engine start-up safety, and enhances the user's driving experience. Therefore, this method solves the technical problems in related technologies where relying solely on temperature for accurate risk assessment is insufficient, and the limited control actions for cold starts are unsuitable for varying environmental conditions, posing significant safety hazards.

[0103] Next, the vehicle start control device according to an embodiment of this application is described with reference to the accompanying drawings.

[0104] Figure 4 This is a block diagram of a vehicle start control device according to an embodiment of this application.

[0105] like Figure 4 As shown, the vehicle start control device 11 includes: a judgment module 100, a first acquisition module 200, a determination module 300, and a control module 400.

[0106] Specifically, the judgment module 100 is used to determine whether there is a risk of low-temperature start-up of the vehicle based on the ambient temperature of the vehicle's operation.

[0107] The first acquisition module 200 is used to acquire the current operating parameters of the vehicle when the vehicle is in the target operating mode and there is a risk of starting the vehicle at low temperatures.

[0108] The determination module 300 is used to determine the risk factors of vehicle start-up misfire and vibration based on the current operating parameters, and to determine the risk level corresponding to the risk factors.

[0109] The control module 400 is used to control the vehicle to perform corresponding start-up suppression actions according to the risk level in order to start the vehicle's engine.

[0110] Optionally, in one embodiment of this application, the determining module 300 includes: an acquisition unit and an assignment unit.

[0111] The acquisition unit is used to obtain the vehicle's current oil temperature, current oil viscosity, and engine downtime based on the current operating parameters.

[0112] The assignment unit is used to assign corresponding influence coefficients to the current oil temperature, current oil viscosity, and downtime, respectively, to obtain the risk factor.

[0113] Optionally, in one embodiment of this application, the vehicle start control device 10 further includes: a second acquisition module, an assignment module, a division module, and a matching module.

[0114] The second acquisition module is used to acquire sample operating parameters of the vehicle and the impact of these parameters on the vehicle's misfire and vibration phenomena.

[0115] The assignment module is used to assign corresponding influence coefficients to the sample oil temperature, sample oil viscosity and sample downtime in the sample operating parameters based on their effects.

[0116] The partitioning module is used to cluster the sample operating parameters and influence coefficients to divide the influence of the sample operating parameters on the fire start-up and shaking phenomenon into multiple coefficient intervals.

[0117] The matching module is used to generate a risk factor impact coefficient table based on multiple coefficient ranges. It uses the current oil temperature, current oil viscosity, and downtime as indexes to match the corresponding impact coefficients in the impact coefficient table.

[0118] Optionally, in one embodiment of this application, the control module 400 includes a determination unit and a control unit.

[0119] The determining unit is used to determine the engine speed limit, oil flow valve opening limit, and oil heating power limit of the vehicle based on the risk level.

[0120] The control unit is used to limit the vehicle by limiting engine speed, limiting the opening of the oil flow valve, and limiting the power of oil heating until the oil temperature reaches a preset temperature threshold.

[0121] Optionally, in one embodiment of this application, the vehicle start control device 11 further includes: a third acquisition module, a judgment module, and an update module.

[0122] The third acquisition module is used to acquire the vehicle's communication information within a preset time period.

[0123] The judgment module is used to determine whether the start-up suppression action meets the preset update conditions based on communication information.

[0124] The update module is used to update the startup suppression action based on communication information and execute the updated startup suppression action when the preset update conditions are met.

[0125] It should be noted that the foregoing explanation of the vehicle start control method embodiment also applies to the vehicle start control device of this embodiment, and will not be repeated here.

[0126] The vehicle start control device proposed in this application can determine the risk factors of cold start misfire and vibration based on the vehicle's current operating parameters when there is a risk of cold start. This allows for a comprehensive assessment of the cold start risk, resulting in a more accurate judgment. The device also determines the risk level corresponding to the risk factor and controls the vehicle to perform appropriate start suppression actions based on the risk level. This more effectively addresses the risks associated with cold start conditions, improves engine start safety, and enhances the user's driving experience. Therefore, this solves the technical problems in related technologies where relying solely on temperature for accurate risk assessment is insufficient, and the control actions for cold starts are limited and unsuitable for varying environmental conditions, posing significant safety hazards.

[0127] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:

[0128] The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0129] When the processor 502 executes the program, it implements the vehicle low-temperature cold start control method provided in the above embodiments.

[0130] Furthermore, the vehicle also includes:

[0131] Communication interface 503 is used for communication between memory 501 and processor 502.

[0132] The memory 501 is used to store computer programs that can run on the processor 502.

[0133] The memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0134] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0135] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0136] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0137] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the vehicle start-up control method described above.

[0138] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the vehicle start-up control method provided in this embodiment of the invention.

[0139] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0140] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0141] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0142] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0143] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0144] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0145] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0146] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for starting control of a vehicle, characterized in that, Includes the following steps: Based on the ambient temperature at which the vehicle operates, determine whether the vehicle is at risk of starting in low temperatures; If the vehicle is at risk of starting at low temperatures, then when the vehicle is in the target operating mode, the current operating parameters of the vehicle are obtained. Based on the current operating parameters, the vehicle's current oil temperature, current oil viscosity, and engine downtime are obtained. Obtain sample operating parameters of the vehicle and the impact of the sample operating parameters on the vehicle's misfire and vibration phenomenon; based on the impact, assign corresponding influence coefficients to the sample oil temperature, sample oil viscosity, and sample downtime in the sample operating parameters; Clustering is performed on the sample operating parameters and the influence coefficients to divide the influence of the sample operating parameters on the fire start-up phenomenon into multiple coefficient intervals; A risk factor impact coefficient table is generated based on the multiple coefficient ranges. The current oil temperature, the current oil viscosity, and the downtime are used as indices. The corresponding impact coefficients are matched in the impact coefficient table to determine the risk factor for the vehicle to experience low-temperature start-up misfire and vibration, and to determine the risk level corresponding to the risk factor. Based on the risk level, the vehicle is controlled to perform a corresponding start-suppression action to start the vehicle's engine; The step of controlling the vehicle to perform a corresponding start-up suppression action based on the risk level to start the vehicle's engine includes: determining the vehicle's engine speed limit, oil flow valve opening limit, and oil heating power limit based on the risk level; and using the engine speed limit, oil flow valve opening limit, and oil heating power limit to restrict the vehicle until the oil temperature reaches a preset temperature threshold.

2. The method according to claim 1, characterized in that, Before controlling the vehicle to perform the corresponding start-up suppression action according to the risk level, the method further includes: Obtain the communication information of the vehicle within a preset time period; Based on the communication information, determine whether the start-up suppression action meets the preset update conditions; If the preset update conditions are met, the startup suppression action is updated based on the communication information, and the updated startup suppression action is executed.

3. A vehicle start control device, characterized in that, The method for implementing the vehicle start-up control as described in claim 1 or 2 includes: The judgment module is used to determine whether the vehicle is at risk of starting at low temperatures based on the ambient temperature during vehicle operation. The acquisition module is used to acquire the current operating parameters of the vehicle when the vehicle is in the target operating mode and the vehicle is at the risk of low-temperature start-up. The determination module is used to obtain the current oil temperature, current oil viscosity, and engine downtime of the vehicle based on the current operating parameters; acquire sample operating parameters of the vehicle and the influence of the sample operating parameters on the misfire vibration phenomenon of the vehicle; assign corresponding influence coefficients to the sample oil temperature, sample oil viscosity, and sample downtime of the sample operating parameters based on the influence; cluster the sample operating parameters and the influence coefficients to divide the influence of the sample operating parameters on the misfire vibration phenomenon into multiple coefficient intervals; generate an influence coefficient table of risk factors according to the multiple coefficient intervals, and match the corresponding influence coefficients in the influence coefficient table with the current oil temperature, current oil viscosity, and downtime as indices to determine the risk factors of the vehicle experiencing low-temperature start-up misfire vibration, and determine the risk level corresponding to the risk factors; The control module is used to control the vehicle to perform a corresponding start-suppression action according to the risk level, so as to start the vehicle's engine; The control module includes: a determining unit, used to determine the engine speed limit, oil flow valve opening limit, and oil heating power limit of the vehicle based on the risk level; and a control unit, used to limit the vehicle using the engine speed limit, oil flow valve opening limit, and oil heating power limit until the oil temperature reaches a preset temperature threshold.

4. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the vehicle start-up control method as described in claim 1 or 2.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the vehicle start-up control method as described in claim 1 or 2.

6. A computer program product, comprising a computer program, characterized in that, When the computer program is executed, it is used to implement the vehicle start-up control method as described in claim 1 or 2.

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