Vehicle starting control method and device, vehicle and storage medium

Abstract

The invention relates to a starting control method and device of a vehicle, the vehicle and a storage medium, and the method comprises the steps that whether the vehicle has a low-temperature starting risk or not is judged based on the environment temperature of vehicle operation; if the vehicle has the low-temperature start-up risk, current operation parameters of the vehicle are obtained under the condition that the vehicle is in the target operation mode; based on the current operation parameters, determining a risk factor of low-temperature start-up fire shaking of the vehicle, and determining a risk level corresponding to the risk factor; and controlling the vehicle to execute a corresponding start suppression action according to the risk level so as to start an engine of the vehicle. Therefore, the technical problems that in the related technology, accurate risk judgment is difficult to carry out due to single judgment only based on temperature, the control action for coping with cold start is single, the control action is difficult to adapt to variable environment working conditions, and large potential safety hazards exist are solved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle startup control, and in particular to a vehicle startup control method, device, vehicle, and storage medium. Background Art

[0002] The vehicle's engine has an idle jitter problem when it is cold-started at low temperatures. The reason is that the hydraulic tappet sinking time is too long to compensate for the thermal expansion of the exhaust valve in a short time, resulting in the valve not closing tightly and air leakage in the combustion chamber, causing single-cylinder or multi-cylinder misfires during cold start.

[0003] In order to solve the above problems, in the related art, the internal temperature of the engine main oil channel is monitored in real time, and the heating device is turned on or off according to the monitored temperature to avoid single-cylinder or multi-cylinder misfire during cold start.

[0004] However, the factors that lead to vehicle misfire and vibration during low-temperature startup are complex and diverse. It is difficult to make an accurate risk assessment based on a single judgment of temperature. At the same time, the control action for cold start is single and difficult to adapt to changing environmental conditions. For example, when the temperature is extremely low, the preset single heating power is difficult to effectively raise the oil temperature to the target value, which poses a major safety hazard and urgently needs to be improved. Summary of the Invention

[0005] The present application provides a vehicle startup control method, device, vehicle and storage medium to solve the technical problems in the related art that it is difficult to make accurate risk assessments based on a single temperature judgment, and the control action for cold starts is single and difficult to adapt to changing environmental conditions, posing a major safety hazard.

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

[0007] According to the above-mentioned technical means, the embodiment of the present application can determine the risk factor of the vehicle's low-temperature start-up misfire and jitter according to the vehicle's current operating parameters when the vehicle is at risk of low-temperature start-up, so as to comprehensively judge the cold start risk, obtain a more accurate judgment result, and determine the risk level corresponding to the risk factor, so as to control the vehicle to perform corresponding start-up inhibition actions according to the risk level, and more specifically solve the risks existing in the current cold start conditions, improve the vehicle's engine start-up safety, and enhance the user's driving experience.

[0008] Optionally, in one embodiment of the present application, determining the risk factor of the vehicle experiencing low-temperature start-up misfire jitter based on the current operating parameters includes: obtaining the current oil temperature, current oil viscosity and engine shutdown duration 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 shutdown duration, respectively, to obtain the risk factor.

[0009] According to the above technical means, the embodiment of the present application can make a comprehensive judgment on the oil temperature, oil viscosity and engine shutdown time to obtain a comprehensive risk factor and avoid erroneous judgments caused by single numerical judgments.

[0010] Optionally, in one embodiment of the present application, before assigning corresponding influence coefficients to the current oil temperature, the current oil viscosity and the downtime respectively, it also includes: obtaining sample operating parameters of the vehicle and the influence of the sample operating parameters on the misfire jitter phenomenon of the vehicle; 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 jitter phenomenon into multiple coefficient intervals; generating an influence coefficient table of risk factors according to the multiple coefficient intervals, and matching the corresponding influence coefficients in the influence coefficient table with the current oil temperature, the current oil viscosity and the downtime as indexes.

[0011] According to the above-mentioned technical means, the embodiment of the present application can summarize and classify data through a large amount of sample data and the impact of the sample data on the vehicle's misfire vibration phenomenon 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 numerical value.

[0012] Optionally, in one embodiment of the present application, the controlling of the vehicle to perform corresponding start-up inhibition actions according to the risk level to start the engine of the vehicle includes: determining the engine speed limit, oil flow valve opening limit and oil heating power limit of the vehicle based on the risk level; and limiting 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.

[0013] According to the above technical means, the embodiment of the present application can determine multiple start-up inhibition actions according to the risk level, such as limiting the engine speed, oil heating power, etc., to compensate for the thermal expansion of the exhaust valve, which causes the valve to be not closed tightly and the combustion chamber to leak, resulting in single-cylinder or multi-cylinder misfire during cold start.

[0014] Optionally, in one embodiment of the present application, before controlling the vehicle to perform a corresponding start-up inhibition action according to the risk level, it also includes: obtaining communication information of the vehicle within a preset time period; judging whether the start-up inhibition action meets a preset update condition based on the communication information; if the preset update condition is met, updating the start-up inhibition action based on the communication information, and executing the updated start-up inhibition action.

[0015] According to the above technical means, the embodiment of the present application can update the startup inhibition action according to the vehicle system upgrade or user customization to improve and maintain the startup inhibition action for coping with low-temperature startup misfire jitter.

[0016] The second aspect of the present application provides a vehicle starting control device, including: a judgment module, which is used to judge whether the vehicle has a low-temperature starting risk based on the ambient temperature of the vehicle; a first acquisition module, which is used to obtain the current operating parameters of the vehicle when the vehicle has the low-temperature starting risk and the vehicle is in a target operating mode; a determination module, which is used to determine the risk factor of the vehicle experiencing low-temperature starting misfire jitter based on the current operating parameters, and determine the risk level corresponding to the risk factor; and a control module, which is used to control the vehicle to perform a corresponding starting inhibition action according to the risk level to start the engine of the vehicle.

[0017] Optionally, in one embodiment of the present application, the determination module includes: an acquisition unit for obtaining the current oil temperature, current oil viscosity and engine downtime of the vehicle based on the current operating parameters; an assignment unit for assigning 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 the present application, it also includes: a second acquisition module, used to obtain sample operating parameters of the vehicle and the influence of the sample operating parameters on the misfire jitter phenomenon of the vehicle; an assignment module, used to assign corresponding influence coefficients to the sample oil temperature, sample oil viscosity and sample shutdown time 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 jitter phenomenon into multiple coefficient intervals; a matching module, used to generate an influence coefficient table of risk factors based on the multiple coefficient intervals, and match the corresponding influence coefficients in the influence coefficient table with the current oil temperature, the current oil viscosity and the shutdown time as indexes.

[0019] Optionally, in one embodiment of the present application, the control module includes: a determination unit for determining the engine speed limit, oil flow valve opening limit and oil heating power limit of the vehicle based on the risk level; a control unit for limiting 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 the present application, it also includes: a third acquisition module, used to obtain the communication information of the vehicle within a preset time period; a judgment module, used to determine whether the start-up suppression action meets the preset update conditions based on the communication information; an update module, used to update the start-up suppression action based on the communication information when the preset update conditions are met, and execute the updated start-up suppression action.

[0021] A third aspect of the present application provides a vehicle, comprising: 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 startup control method as described in the above embodiment.

[0022] A fourth aspect of the present application provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the vehicle startup control method as described in the above embodiment.

[0023] The fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the vehicle startup control method as described above.

[0024] In the case of a vehicle with a low-temperature start risk, the embodiments of the present application can determine the risk factor for the vehicle experiencing a misfire and shudder during a low-temperature start based on the vehicle's current operating parameters. This allows for a comprehensive assessment of the cold start risk, resulting in a more accurate assessment result, and a risk level corresponding to the risk factor. This allows the vehicle to be controlled to perform corresponding start-up suppression actions based on the risk level, more specifically addressing the risks posed by the current cold start condition, improving the vehicle's engine start safety, and enhancing the user's driving experience. This resolves the technical issues in related technologies where accurate risk assessments are difficult to make based on a single temperature assessment, and where the control actions for cold starts are limited, making them difficult to adapt to changing environmental conditions and presenting significant safety hazards.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0028] Figure 2 This is a flowchart of a vehicle startup control method provided according to an embodiment of the present application;

[0029] Figure 3 This is a flowchart of a vehicle startup control method provided according to one embodiment of the present application;

[0030] Figure 4 Schematic diagram of the structure of a vehicle startup control device provided according to an embodiment of the present application;

[0031] Figure 5 A schematic structural diagram of a vehicle provided according to an embodiment of the present 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 DESCRIPTION

[0033] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0034] The following describes a vehicle startup control method, device, vehicle, and storage medium according to an embodiment of the present application with reference to the accompanying drawings. In response to the technical problems mentioned in the above background art, the related art, which relies solely on temperature determination, is difficult to accurately determine risk, and the control actions for cold start are simple, making it difficult to adapt to changing environmental conditions, and presenting significant safety hazards, the present application provides a vehicle startup control method. In this method, when a vehicle is at risk of starting at a low temperature, the risk factor for the vehicle to experience cold start misfire jitter can be determined based on the vehicle's current operating parameters. This method comprehensively determines the cold start risk, obtains a more accurate determination result, and determines a risk level corresponding to the risk factor. Based on the risk level, the vehicle is controlled to perform corresponding startup suppression actions, thereby more specifically addressing the risks of the current cold start condition, improving the vehicle's engine startup safety, and enhancing the user's driving experience. This solves the technical problems in the related art, which relies solely on temperature determination, is difficult to accurately determine risk, and the control actions for cold start are simple, making it difficult to adapt to changing environmental conditions, and presenting significant safety hazards.

[0035] Understandably, engines in low-temperature environments experience poor lubrication due to low oil viscosity, and larger clearances between moving parts due to thermal expansion and contraction. Hybrid vehicles can also experience extended periods of inactivity, leading to misfires and jitter during cold-starts in cold regions, severely impacting NVH (Noise, Vibration, and Harshness) performance.

[0036] The embodiments of the present application can address the issue of slow hydraulic tappet settling during cold-start operations in cold regions due to low oil viscosity, which can cause lax exhaust valve closure, combustion chamber air leakage, unstable engine combustion, and other abnormalities such as cold-start jitter. The technical solution employed in the embodiments of the present application utilizes a vehicle controller to identify the engine cold-start condition, preheating the oil using a PTC oil heater before starting the cold engine, and executing the start command only after the oil temperature reaches the target temperature.

[0037] First, the embodiments of the present application can be based on Figure 1 The oil circulation system with PTC heating function shown realizes the vehicle startup control method.

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

[0039] During the actual execution process, 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 the oil is heated, the PCT4 is installed in the oil heating box 3 to heat the oil, and the controller 7 can issue a control signal for the start inhibition action according to the risk level of the vehicle to control the actuator 8 to execute the action.

[0040] Specifically, Figure 2 A flowchart of a vehicle startup control method provided in an embodiment of the present application.

[0041] like Figure 2 As shown, the vehicle startup control method includes the following steps:

[0042] In step S201, based on the ambient temperature of the vehicle, it is determined whether the vehicle has a low-temperature startup risk.

[0043] It is understandable that the engine is the heart of the car. There are many metal surfaces in the engine that rub against each other. These parts move at high speeds and in poor environments. When the vehicle is started at low temperatures, the engine oil has not yet fully circulated to various parts of the engine, resulting in insufficient lubrication, which will cause the engine to shake when starting.

[0044] In the vehicle, since the hydraulic tappet takes a long time to settle, it is unable to compensate for the thermal expansion of the exhaust valve in a short time, resulting in poor valve closure and air leakage in the combustion chamber, which in turn causes single-cylinder or multi-cylinder misfires during cold start, affecting the user's actual driving experience. In order to avoid the above problems, the embodiment of the present application first obtains the ambient temperature of the vehicle to determine whether the vehicle is in a cold start condition, that is, whether there is a risk of low-temperature startup.

[0045] For example, if the vehicle temperature is within the temperature range for activating the low-temperature start misfire jitter judgment, the low-temperature start misfire jitter judgment condition is activated, which means there is a low-temperature start risk; otherwise, it indicates that the current ambient temperature is not likely to cause a low-temperature start misfire, and the low-temperature start misfire jitter judgment condition is not activated, which means there is no low-temperature start risk.

[0046] Among them, the low-temperature start-up misfire jitter judgment condition in the embodiment of the present application is a preset value after the test: According to a large number of tests, when the ambient temperature of the vehicle is between -35°C and 0°C, there is a risk of low-temperature start-up. It should be noted that the ambient temperature range for the risk of low-temperature start-up can be set accordingly according to different regional environments and different vehicle models.

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

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

[0049] As a possible implementation method, the current operating parameters can be obtained through sensors and control units installed in the vehicle itself.

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

[0051] The vehicle operating mode can be determined based on the operating parameters of the vehicle engine, generator, drive motor, clutch, etc.

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

[0053] Since the low-temperature starting risk condition occurs during the cold start phase of the engine, the precondition should be the engine not started condition, so the target operating mode is EV parking mode and pure electric mode.

[0054] For fuel vehicles, the risk of low-temperature startup may occur in any cold start scenario. At this time, the vehicle's template operating mode is the startup mode for the first time starting the engine after parking.

[0055] In step S203, a risk factor for the vehicle to experience low-temperature misfire jitter is determined based on current operating parameters, and a risk level corresponding to the risk factor is determined.

[0056] In this embodiment of the present application, the risk factor for low-temperature misfire shudder is the risk factor for a low-temperature misfire. The risk level represents the level of misfire shudder that may occur, including but not limited to low, medium, and high risk levels. The low-temperature misfire shudder risk factor for 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 the present application, the risk factor of the vehicle experiencing low-temperature startup misfire jitter is determined based on the current operating parameters, including: obtaining the vehicle's current oil temperature, current oil viscosity and engine shutdown time based on the current operating parameters; and assigning corresponding influence coefficients to the current oil temperature, current oil viscosity and shutdown time, respectively, to obtain the risk factor.

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

[0059] The embodiment of the present application can obtain the actual values ​​of the current oil temperature, the current oil viscosity and the engine shutdown time based on the current operating parameters, and perform associated assignments for the above values ​​to obtain the corresponding influence coefficients of the current oil temperature, the current oil viscosity and the shutdown time, and superimpose the above influence coefficients to obtain the risk factor.

[0060] Among them, the association or mapping relationship between the oil temperature, oil viscosity and engine shutdown time and the influence coefficient can be set accordingly by those skilled in the art and is not specifically limited here.

[0061] Optionally, in one embodiment of the present application, before assigning corresponding influence coefficients to the current oil temperature, current oil viscosity and downtime respectively, it also includes: obtaining sample operating parameters of the vehicle and the influence of the sample operating parameters on the misfire jitter phenomenon of the vehicle; 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 jitter phenomenon into multiple coefficient intervals; generating an influence coefficient table of risk factors according to the multiple coefficient intervals, and matching the corresponding influence coefficients in the influence coefficient table with the current oil temperature, current oil viscosity and downtime as indexes.

[0062] In other embodiments, the relationship between the oil temperature, oil viscosity, and engine shutdown time and the influence coefficient may be determined using a large amount of sample data.

[0063] The impact of downtime on hydraulic tappet clearance was verified under three operating conditions: downtime of less than one hour, between one and three hours, and greater than three hours, at different ambient temperatures. Extensive testing in a low-temperature chamber to verify the effects of varying ambient temperatures, oil types, oil supply pressures, and downtime on cold-start misfire shuddering resulted in the risk factor influencing factors shown in Table 1.

[0064] Table 1

[0065]

[0066]

[0067] For example, when the oil temperature is below -35°C, the impact coefficients of high-viscosity and low-viscosity oils on the problem are between 1.5 and 1.4, the impact coefficients of low and high oil supply pressures are between 1.15 and 1.1, and the impact coefficient of downtime is between 1.1 and 1.05. Assuming that the current main oil gallery oil temperature is below -35°C, high-viscosity oil is used, the oil supply pressure is low, and the engine has been started for more than 3 hours, the impact coefficients for this operating condition are:

[0068] 1.5+1.15+1.15=3.8.

[0069] The risk level of low-temperature startup misfire jitter is determined based on the weighted risk factors. For example, the relationship between the risk level and the risk factor can be shown in Table 2, which is a risk level judgment table.

[0070] Table 2

[0071] Risk Level Low risk Medium risk High risk 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 execute corresponding start-up inhibition actions according to the risk level to start the engine of the vehicle.

[0073] Taking a hybrid vehicle as an example, the embodiments of the present application can determine a low-temperature start-up misfire vibration suppression strategy, i.e., initiate suppression actions, based on the current vehicle operating mode (EV parking, pure electric mode) and the vehicle's corresponding risk level (low, medium, or high). For example, if the vehicle's operating mode is pure electric mode and the corresponding risk level is high, the vehicle's low-temperature start-up misfire vibration suppression strategy will be determined as the response strategy corresponding to the high risk of pure electric mode.

[0074] Optionally, in one embodiment of the present application, the vehicle is controlled to perform corresponding start-up inhibition actions according to the risk level to start the vehicle's engine, including: determining the vehicle's engine speed limit, oil flow valve opening limit and oil heating power limit based on the risk level; and limiting 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.

[0075] Taking a hybrid vehicle as an example, when the vehicle operating mode is EV parking or pure electric operation mode, its corresponding low-temperature start misfire vibration suppression response strategy, that is, the start suppression action includes:

[0076] If the vehicle's risk factor level is low, the oil pan is heated using an electric heater inside the oil pan, the generator drives the engine to operate at a first preset speed, the oil flow valve operates at a first preset flow value, and the oil heating device PTC operates at a first preset power. When the vehicle reaches the preset low-temperature start-up misfire vibration suppression condition, the oil flow valve and the oil electric heater are closed;

[0077] If the vehicle's risk factor level is medium, the oil pan is heated using an electric heater inside the oil pan, the generator drives the engine to operate at a second preset speed, the oil flow valve operates at a second preset flow value, and the oil heating device PTC operates at a second preset power. When the vehicle reaches the preset low-temperature start-up misfire vibration suppression conditions, the oil flow valve and the oil electric heater are closed;

[0078] If the vehicle's risk factor level is high, the oil pan is heated using an electric heater inside the oil pan, the generator drives the engine to operate at a third preset speed, the oil flow valve operates at a third preset flow value, and the oil heating device PTC operates at a third preset power. When the vehicle reaches the preset low-temperature start-up misfire vibration suppression conditions, the oil flow valve and the oil electric heater are closed;

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

[0080] Among them, the first preset speed, the second preset speed, the third preset speed, the first preset flow value, the second preset flow value, the third preset flow value, the first preset power, the second preset power and the third preset power can be set accordingly by technical personnel in this field according to actual conditions.

[0081] For example, it can be shown in Table 3, which is a comparison table of risk levels and startup inhibition actions.

[0082] Table 3

[0083]

[0084] Optionally, in one embodiment of the present application, before controlling the vehicle to perform a corresponding start inhibition action according to the risk level, it also includes: obtaining the communication information of the vehicle within a preset time period; judging whether the start inhibition action meets the preset update conditions based on the communication information; if the preset update conditions are met, updating the start inhibition action based on the communication information, and executing the updated start inhibition action.

[0085] The cold start misfire and jitter response strategy can be pre-set based on experience for different risk levels corresponding to different vehicle operating modes, and can be improved and maintained through vehicle system upgrades or user customization.

[0086] Furthermore, when the vehicle starts the engine, the embodiment of the present application can determine whether the engine starts normally, that is, whether a misfire occurs or whether there is any shaking.

[0087] If the vehicle can be started normally, but misfire and minor jitter occur, the embodiment of the present application can record the startup inhibition action, risk factor and risk level to facilitate subsequent investigation of the cause.

[0088] If it cannot start normally, a complete misfire may have occurred. At this time, the embodiment of the present application can attempt a secondary start inhibition action. If it still cannot start normally, the vehicle is prohibited from starting the engine and an alarm signal is generated for subsequent maintenance.

[0089] Combine Figure 3 As shown, the working principle of the vehicle startup control method of the embodiment of the present application is described in detail using an embodiment.

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

[0091] Step S301, judging whether the vehicle's engine is working to determine whether there is a risk of low-temperature startup, if the engine is working, proceeding to step S303, otherwise, proceeding to step S302.

[0092] Step S302: If the engine is not operating, it is determined that the vehicle is in the target operating condition, that is, the EV parking condition or the pure electric condition.

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

[0094] Step S304: determine whether there is a risk of low-temperature startup based on the vehicle's operating environment temperature. If not, proceed to step S303; otherwise, proceed to step S305.

[0095] Step S305 : determining a risk factor based on current operating parameters of the vehicle, and determining a risk level according to the risk factor, wherein the current operating parameters can be obtained through sensors of the vehicle.

[0096] The risk factor is the risk factor for a cold start misfire. The risk level is the level of misfire shudder that can occur, including but not limited to low, medium, and high risk levels. The vehicle's cold start misfire shudder risk factor is determined based on the vehicle's operating parameters.

[0097] Step S306: Determine the start-up suppression action based on the risk level.

[0098] The present embodiment can determine a low-temperature misfire start-up jitter suppression strategy, i.e., initiate suppression actions, based on the current vehicle operating mode (EV parking, electric-only mode) and the vehicle's corresponding risk level (low, medium, or high). For example, if the vehicle's operating mode is electric-only mode and the corresponding risk level is high, the vehicle's low-temperature misfire start-up jitter suppression strategy will be determined as the response strategy for high-risk electric-only mode.

[0099] The cold start misfire and jitter response strategy can be pre-set based on experience for different risk levels corresponding to different vehicle operating modes, and can be improved and maintained through vehicle system upgrades or user customization.

[0100] Step S307 , determining whether the engine oil temperature reaches the target temperature, such as whether it is greater than 0° C. If so, proceed to step S308 , otherwise proceed to step S305 .

[0101] Step S308, exit the oil heating mode and start the engine.

[0102] According to the vehicle startup control method proposed in the embodiment of the present application, when the vehicle is at risk of starting at a low temperature, the risk factor of the vehicle experiencing misfire and vibration at a low temperature startup can be determined based on the vehicle's current operating parameters, so as to comprehensively determine the cold start risk, obtain a more accurate determination result, and determine the risk level corresponding to the risk factor, thereby controlling the vehicle to perform the corresponding startup suppression action based on the risk level, more specifically addressing the risks existing in the current cold start operating conditions, improving the vehicle's engine startup safety, and enhancing the user's driving experience. This solves the technical problems in the related art that accurate risk determination is difficult to make based on a single determination of temperature, and that the control action for cold starting is single and difficult to adapt to changing environmental conditions, posing a significant safety hazard.

[0103] Next, a vehicle startup control device according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0104] Figure 4 It is a block diagram of a vehicle startup control device according to an embodiment of the present application.

[0105] like Figure 4 As shown, the vehicle startup 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 judge whether the vehicle has a low-temperature startup risk based on the ambient temperature of the vehicle.

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

[0108] The determination module 300 is used to determine a risk factor for the vehicle to experience misfire jitter at low temperature start based on current operating parameters, and to determine a risk level corresponding to the risk factor.

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

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

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

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

[0113] Optionally, in one embodiment of the present application, the vehicle startup 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 obtain sample operating parameters of the vehicle and the impact of the sample operating parameters on the misfire vibration phenomenon of the vehicle.

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

[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 misfire vibration phenomenon into multiple coefficient intervals.

[0117] The matching module is used to generate an influence coefficient table of risk factors according to multiple coefficient intervals, and match the corresponding influence coefficient in the influence coefficient table with the current oil temperature, current oil viscosity and downtime as indexes.

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

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

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

[0121] Optionally, in one embodiment of the present application, the vehicle startup 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 communication information of the vehicle within a preset time period.

[0123] The judgment module is used to judge whether the startup inhibition action meets the preset update condition based on the communication information.

[0124] The updating module is used to update the startup inhibition action based on the communication information and execute the updated startup inhibition action when a preset update condition is met.

[0125] It should be noted that the above explanation of the embodiment of the vehicle startup control method is also applicable to the vehicle startup control device of this embodiment, and will not be repeated here.

[0126] According to the vehicle startup control device proposed in the embodiment of the present application, when the vehicle is at risk of starting at a low temperature, the risk factor of the vehicle experiencing misfire and vibration at a low temperature startup can be determined based on the vehicle's current operating parameters, thereby comprehensively determining the cold start risk, obtaining a more accurate determination result, and determining the risk level corresponding to the risk factor. The device can then control the vehicle to perform corresponding startup suppression actions based on the risk level, more specifically addressing the risks existing in the current cold start operating conditions, improving the vehicle's engine startup safety, and enhancing the user's driving experience. This solves the technical problems in the related art, where accurate risk determination is difficult to make based on a single temperature determination, and the control actions for cold starts are single, making it difficult to adapt to changing environmental conditions and posing significant safety hazards.

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

[0128] Memory 501 , processor 502 , and computer programs stored in the memory 501 and executable on the processor 502 .

[0129] When the processor 502 executes the program, the low-temperature cold start control method for the vehicle provided in the above embodiment is implemented.

[0130] Furthermore, the vehicle further comprises:

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

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

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

[0134] If the memory 501, processor 502, and communication interface 503 are implemented independently, the communication interface 503, memory 501, and processor 502 can be connected to each other via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, 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, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0136] The 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 the present application.

[0137] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which implements the above vehicle startup control method when executed by a processor.

[0138] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the vehicle startup control method provided by an embodiment of the present invention.

[0139] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

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

[0141] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing a custom logical function or process step, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed in a different order than shown or discussed, including performing functions in a substantially simultaneous manner or in a reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0142] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the 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 (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program 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 the following: an electrical connection with one or N wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program can be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing it in other suitable ways as necessary, and then storing it in a computer memory.

[0143] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0144] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

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

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

Claims

1. A vehicle startup control method, characterized in that: The following steps are involved: Based on the ambient temperature of the vehicle, determine whether the vehicle has the risk of starting at a low temperature; If the vehicle has the low-temperature startup risk, obtaining current operating parameters of the vehicle when the vehicle is in a target operating mode; determining a risk factor for low-temperature start misfire jitter of the vehicle based on the current operating parameters, and determining a risk level corresponding to the risk factor; The vehicle is controlled to perform a corresponding start inhibition action according to the risk level to start the engine of the vehicle.

2. The method according to claim 1, characterized in that The determining, based on the current operating parameters, a risk factor for the vehicle to experience low-temperature misfire and shudder, includes: Obtaining a current engine oil temperature, a current engine oil viscosity, and an engine shutdown duration of the vehicle based on the current operating parameters; Corresponding influence coefficients are assigned to the current engine oil temperature, the current engine oil viscosity, and the downtime duration to obtain the risk factor.

3. The method according to claim 2, characterized in that Before assigning corresponding influence coefficients to the current engine oil temperature, the current engine 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 misfire shudder phenomenon of the vehicle; assigning corresponding influence coefficients to the sample oil temperature, sample oil viscosity and sample downtime of 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 jitter phenomenon into a plurality of coefficient intervals; An influence coefficient table of risk factors is generated according to the multiple coefficient intervals, and corresponding influence coefficients are matched in the influence coefficient table using the current engine oil temperature, the current engine oil viscosity, and the shutdown duration as indexes.

4. The method according to claim 1, wherein The controlling the vehicle to execute a corresponding start-up inhibition action according to the risk level to start the engine of the vehicle includes: determining an engine speed limit, an oil flow valve opening limit, and an oil heating power limit for the vehicle based on the risk level; The vehicle is limited by 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.

5. The method according to claim 1, wherein Before controlling the vehicle to execute a corresponding start-up inhibition action according to the risk level, the method further includes: Acquiring communication information of the vehicle within a preset time period; Determining whether the startup inhibition action satisfies a preset update condition based on the communication information; If the preset update condition is met, the startup inhibition action is updated based on the communication information, and the updated startup inhibition action is executed.

6. A vehicle startup control device, characterized in that: include: A judgment module, used to judge whether the vehicle has a low-temperature startup risk based on the ambient temperature of the vehicle; an acquisition module, configured to acquire current operating parameters of the vehicle when the vehicle has the low-temperature startup risk and when the vehicle is in a target operating mode; a determination module, configured to determine a risk factor for the vehicle to experience misfire and shudder at low temperature start based on the current operating parameters, and determine a risk level corresponding to the risk factor; A control module is used to control the vehicle to perform a corresponding start-up inhibition action according to the risk level to start the engine of the vehicle.

7. The device according to claim 6, characterized in that The determination module includes: an acquisition unit, configured to obtain a current engine oil temperature, a current engine oil viscosity, and an engine shutdown duration of the vehicle based on the current operating parameters; The assignment unit is used to assign corresponding influence coefficients to the current engine oil temperature, the current engine oil viscosity and the shutdown duration respectively, so as to obtain the risk factor.

8. A vehicle, characterized in that: include: 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 startup control method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the vehicle startup control method according to any one of claims 1 to 5.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed, it is used to implement the vehicle startup control method according to any one of claims 1 to 5.

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