Preheating method and device of engine, vehicle, medium and program product

Abstract

The invention relates to the technical field of hybrid power vehicles, in particular to an engine preheating method and device, a vehicle, a medium and a program product.The method comprises the steps that the current battery state of charge (SOC) of a power battery of the hybrid power vehicle is detected; when the current SOC reaches the preset threshold value, the current driving mode of the hybrid vehicle is recognized, and whether the engine meets the corresponding preheating condition or not is judged based on the current driving mode; and if the engine meets the preheating condition, a heating instruction is generated, and an air cylinder heating system and a fuel heating system of the hybrid vehicle are started through the heating instruction till the temperature in a cylinder of the engine reaches the target preheating temperature. Therefore, the problems that in the related technology, when an engine of a vehicle is started under the cold engine condition, the fuel combustibility is poor, the method is single, the use requirements of a user in different scenes cannot be effectively met, the user stickiness is poor, resources are wasted, meanwhile, pollutant emission is increased, and the like are solved.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicle, and in particular to an engine preheating method, device, vehicle, medium and program product. Background Art

[0002] In the related technologies, the focus of engine starting is on how to start quickly or make intelligent adjustments to save fuel injection, but there is little research on the pollutant emissions caused by this. During the cold start phase, the engine is mostly directly injected with fuel. At this time, the engine is in the cold stage, the intake duct, cylinder wall and fuel temperature are low, the fuel volatility is poor, it cannot be completely mixed with the air, and the combustion performance is poor.

[0003] However, in the related technology, starting the vehicle engine in a cold state will result in poor fuel combustion, and the method is relatively simple and cannot effectively meet the user's usage needs in different scenarios. User stickiness is poor, and it wastes resources while increasing pollutant emissions, which needs to be solved urgently. Summary of the invention

[0004] The present application provides an engine preheating method, device, vehicle, medium and program product to solve the problems in the related art that starting the vehicle engine in a cold engine condition will result in poor fuel combustion, the method is relatively single and cannot effectively meet the user's usage needs in different scenarios, the user stickiness is poor, and resources are wasted while increasing pollutant emissions.

[0005] The first aspect of the present application provides an engine preheating method, comprising the following steps: detecting a current battery state of charge (SOC) of a power battery of a hybrid vehicle; when the current SOC reaches a preset threshold, identifying a current driving mode of the hybrid vehicle, and judging whether the engine meets corresponding preheating conditions based on the current driving mode; if the engine meets the preheating conditions, generating a heating instruction to use the heating instruction to start the cylinder heating system and the fuel heating system of the hybrid vehicle until the in-cylinder temperature of the engine reaches a target preheating temperature.

[0006] Through the above technical means, the embodiment of the present application can start the cylinder heating system and the fuel heating system to preheat the engine when it is detected that the current SOC of the power battery of the hybrid vehicle meets certain requirements and the engine meets certain preheating conditions. Thus, the cylinder heating system, the fuel heating system, the gas heating and the gas circulation device are used to heat the fuel, the intake duct and the inside of the cylinder of the hybrid vehicle engine before starting the engine, increase the cylinder temperature at the initial ignition of the engine, and then improve the oil-gas mixing in the cold start stage of the engine, improve the combustion state, and finally achieve the reduction of pollutant emissions.

[0007] Optionally, in one embodiment of the present application, before using the heating instruction to heat the cylinder heating system and the fuel heating system of the hybrid vehicle, it also includes: determining whether the current driving mode is an energy-saving mode; if the driving mode is the energy-saving mode, correcting the fuel injection amount for heating the cylinder heating system and the fuel heating system.

[0008] Through the above-mentioned technical means, the embodiment of the present application can take into account the actual needs of users. When the user selects the energy-saving mode, the heating functions of the cylinder heating system and the fuel heating system can be stopped, thereby effectively improving the energy-saving effect. At the same time, the fuel injection amount can be increased considering the needs of the vehicle, thereby effectively improving the fuel economy.

[0009] Optionally, in one embodiment of the present application, the pre-heating condition includes that the current temperature of the cylinder heating system is less than a first temperature threshold and / or the current temperature of the fuel heating system is less than a second temperature threshold.

[0010] Through the above-mentioned technical means, the embodiment of the present application can further combine the cylinder heating system and the fuel heating system on the basis of identifying the driving mode of the hybrid vehicle to comprehensively judge whether the engine meets certain preheating conditions, thereby effectively improving the accuracy of the present application when preheating the engine and greatly reducing the waste of resources caused by ineffective heating.

[0011] Optionally, in one embodiment of the present application, before determining whether the current driving mode is the energy-saving mode, it also includes: detecting the initial in-cylinder temperature of the engine; generating an energy-saving prompt when the initial in-cylinder temperature of the engine meets a preset temperature; and controlling the hybrid vehicle to enter the energy-saving mode based on an energy-saving instruction sent by the first user in response to the energy-saving prompt.

[0012] Through the above-mentioned technical means, the embodiment of the present application can actively remind and ask the first user whether to enter the energy-saving mode when the initial cylinder temperature of the vehicle reaches a certain temperature, thereby effectively avoiding the waste of vehicle resources, and can improve the human-computer interactivity of the present application and effectively maintain user stickiness.

[0013] Optionally, in one embodiment of the present application, before determining whether the current driving mode is an energy-saving mode, it also includes: identifying the actual driving needs of the second user; and when the actual driving needs are energy-saving needs, controlling the hybrid vehicle to enter the energy-saving mode.

[0014] Through the above-mentioned technical means, the embodiment of the present application can identify the actual driving needs of the second user, and actively control the hybrid vehicle to enter the energy-saving mode when the actual driving demand is an energy-saving demand, which greatly improves the intelligence level of the present application and can meet the needs of users in different scenarios, effectively improving the actual application scope of the present application and facilitating implementation and promotion.

[0015] The second aspect of the present application provides an engine preheating device, comprising: a first detection module, used to detect the current battery state of charge (SOC) of the power battery of a hybrid vehicle; a first judgment module, used to identify the current driving mode of the hybrid vehicle when the current SOC reaches a preset threshold, and judge whether the engine meets the corresponding preheating conditions based on the current driving mode; a heating module, used to generate a heating instruction when the engine meets the preheating conditions, so as to use the heating instruction to start the cylinder heating system and the fuel heating system of the hybrid vehicle until the in-cylinder temperature of the engine reaches the target preheating temperature.

[0016] Through the above technical means, the embodiment of the present application can start the cylinder heating system and the fuel heating system to preheat the engine when it is detected that the current SOC of the power battery of the hybrid vehicle meets certain requirements and the engine meets certain preheating conditions. Thus, the cylinder heating system, the fuel heating system, the gas heating and the gas circulation device are used to heat the fuel, the intake duct and the inside of the cylinder of the hybrid vehicle engine before starting the engine, increase the cylinder temperature at the initial ignition of the engine, and then improve the oil-gas mixing in the cold start stage of the engine, improve the combustion state, and finally achieve the reduction of pollutant emissions.

[0017] Optionally, in one embodiment of the present application, it also includes: a second judgment module, used to judge whether the current driving mode is an energy-saving mode before using the heating instruction to heat the cylinder heating system and the fuel heating system of the hybrid vehicle; a correction module, used to correct the fuel injection amount for heating the cylinder heating system and the fuel heating system when the driving mode is the energy-saving mode.

[0018] Through the above-mentioned technical means, the embodiment of the present application can take into account the actual needs of users. When the user selects the energy-saving mode, the heating functions of the cylinder heating system and the fuel heating system can be stopped, thereby effectively improving the energy-saving effect. At the same time, the fuel injection amount can be increased considering the needs of the vehicle, thereby effectively improving the fuel economy.

[0019] Optionally, in one embodiment of the present application, the pre-heating condition includes that the current temperature of the cylinder heating system is less than a first temperature threshold and / or the current temperature of the fuel heating system is less than a second temperature threshold.

[0020] Through the above-mentioned technical means, the embodiment of the present application can further combine the cylinder heating system and the fuel heating system on the basis of identifying the driving mode of the hybrid vehicle to comprehensively judge whether the engine meets certain preheating conditions, thereby effectively improving the accuracy of the present application when preheating the engine and greatly reducing the waste of resources caused by ineffective heating.

[0021] Optionally, in one embodiment of the present application, it also includes: a second detection module, used to detect the initial in-cylinder temperature of the engine before determining whether the current driving mode is the energy-saving mode; a generation module, used to generate an energy-saving prompt when the initial in-cylinder temperature of the engine meets a preset temperature; a first control module, used to control the hybrid vehicle to enter the energy-saving mode based on an energy-saving instruction sent by the first user in response to the energy-saving prompt.

[0022] Through the above-mentioned technical means, the embodiment of the present application can actively remind and ask the first user whether to enter the energy-saving mode when the initial cylinder temperature of the vehicle reaches a certain temperature, thereby effectively avoiding the waste of vehicle resources, and can improve the human-computer interactivity of the present application and effectively maintain user stickiness.

[0023] Optionally, in one embodiment of the present application, it also includes: an identification module, used to identify the actual driving demand of the second user before determining whether the current driving mode is the energy-saving mode; a second control module, used to control the hybrid vehicle to enter the energy-saving mode when the actual driving demand is the energy-saving demand.

[0024] Through the above-mentioned technical means, the embodiment of the present application can identify the actual driving needs of the second user, and actively control the hybrid vehicle to enter the energy-saving mode when the actual driving demand is an energy-saving demand, which greatly improves the intelligence level of the present application and can meet the needs of users in different scenarios, effectively improving the actual application scope of the present application and facilitating implementation and promotion.

[0025] 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 engine preheating method as described in the above embodiment.

[0026] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned engine preheating method.

[0027] A fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned engine preheating method.

[0028] 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 the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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:

[0030] Figure 1 A flowchart of a method for preheating an engine provided according to an embodiment of the present application;

[0031] Figure 2 A schematic diagram of a cylinder heating system according to an embodiment of the present application;

[0032] Figure 3 A schematic diagram of a fuel heating system according to an embodiment of the present application;

[0033] Figure 4 A flow chart of a method for controlling engine preheating according to an embodiment of the present application;

[0034] Figure 5 It is a structural schematic diagram of a preheating device for an engine provided according to an embodiment of the present application;

[0035] Figure 6 It is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application.

[0036] Reference numerals:

[0037] 10-Engine preheating device: 100-first detection module, 200-first judgment module and 300-heating module; 601-memory, 602-processor and 603-communication interface. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below, and examples of the embodiments 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.

[0039] The following describes the engine preheating method, device, vehicle, medium and program product of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the engine of the vehicle in the related art mentioned in the background technology mentioned above is started in a cold engine state, the fuel combustion is poor, the method is relatively single, and it cannot effectively meet the user's use needs in different scenarios, the user stickiness is poor, and the waste of resources will increase the pollutant emissions. The present application provides an engine preheating method, in which the cylinder heating system and the fuel heating system can be turned on to preheat the engine when it is detected that the current SOC of the power battery of the hybrid vehicle meets certain requirements and the engine meets certain preheating conditions. Thus, the fuel, intake duct and cylinder of the engine are heated before the hybrid vehicle engine is started through the cylinder heating system, the fuel heating system, the gas heating and gas circulation device, and the cylinder temperature at the initial ignition of the engine is increased, thereby improving the oil-gas mixing in the cold start stage of the engine, improving the combustion state, and finally achieving the reduction of pollutant emissions. In addition, the present application can also assist in improving the engine NVH characteristics during cold start, reduce the fuel enrichment at the start time, and thus improve the vehicle economy. Thereby, the problems in the related technology that starting the vehicle engine in a cold state will result in poor fuel combustion, the method is relatively single and cannot effectively meet the user's usage needs in different scenarios, the user stickiness is poor, resources are wasted and pollutant emissions are increased, etc. are solved.

[0040] Specifically, Figure 1 A flow chart of a method for preheating an engine provided in an embodiment of the present application.

[0041] like Figure 1 As shown, the engine preheating method comprises the following steps:

[0042] In step S101 , the current battery state of charge SOC of the power battery of the hybrid vehicle is detected.

[0043] In some embodiments, when the vehicle starts the engine, the temperature in the engine cylinder is low, which is the cold start stage. Directly adding fuel to heat the engine in this stage will result in poor heating effect. In addition, since the temperature of the intake duct, cylinder wall and fuel is low in the cold stage, the fuel volatility is poor and cannot be completely mixed with the air, which leads to poor combustion and increased pollutant emissions. Therefore, it becomes necessary to preheat the engine.

[0044] If you want to preheat the engine, you must first determine whether the engine is started. For a hybrid vehicle, the embodiment of the present application can determine whether the engine is ready to start by detecting the current SOC (State of Charge) of the hybrid vehicle's power battery.

[0045] In the embodiment of the present application, when detecting the current SOC of the power battery of the hybrid vehicle, it can be achieved, but not limited to, through the battery management system (BMS) of the hybrid vehicle. The battery management system uses a series of sensors and algorithms to monitor the voltage, current, temperature and other parameters of the power battery in real time, and calculates the SOC state of the power battery through complex algorithms based on these parameters and information such as the capacity characteristics of the battery.

[0046] The embodiment of the present application can detect the current SOC of the power battery of the hybrid vehicle to determine whether the engine should be started. It is highly intelligent and avoids the occurrence of invalid heating, which can effectively save the vehicle's heating resources.

[0047] Step S102, when the current SOC reaches a preset threshold, identifying the current driving mode of the hybrid vehicle, and determining whether the engine meets the corresponding preheating condition based on the current driving mode.

[0048] It is understandable that the preset threshold here can be understood as a preset SOC threshold of a power battery of a hybrid vehicle. When the current SOC of the power battery reaches the threshold, it can be judged in a certain way that the hybrid vehicle engine has been started. It should be noted that the specific threshold can be set by professional and technical personnel in this field according to the actual vehicle condition or actual needs based on experience or calibrated based on experiments. This is only an exemplary description and no specific requirements are made.

[0049] In some embodiments, after detecting the current SOC of the power battery, the present application can determine that the engine is started when the current SOC reaches a certain threshold. For example, a hybrid vehicle detects the current SOC of the power battery in real time after the vehicle is started. If the current SOC reaches a certain threshold, minus the economic start SOC is less than 5, then it can be determined that the engine is about to start. Among them, the economic start SOC can be understood here as the engine start SOC of the hybrid vehicle under economic conditions.

[0050] Furthermore, after detecting that the current SOC reaches a certain threshold and the engine is about to start, the embodiment of the present application also needs to identify the current driving mode of the hybrid vehicle, that is, whether it is a mode in which the engine preheating can be performed. For example, when the driving mode of the vehicle is the normal mode, the engine preheating can be performed normally; if the driving mode of the vehicle is the energy-saving mode, the engine preheating cannot be performed at this time.

[0051] In addition to identifying the driving mode, the embodiment of the present application can also determine whether the engine meets certain preheating conditions. For example, when the current temperature of the engine has reached a relatively standard or higher temperature, the engine does not need to be preheated at this time.

[0052] The embodiment of the present application can determine whether engine preheating is required based on the driving mode of the vehicle when the current SOC of the power battery of the hybrid vehicle reaches a certain threshold. It can further determine again based on whether the engine meets certain preheating conditions, thereby effectively improving the rigor and reliability of the present application and ensuring that the engine preheating is performed under vehicle-permitted and safe conditions.

[0053] Optionally, in one embodiment of the present application, the preheating condition includes that the current temperature of the cylinder heating system is less than a first temperature threshold and / or the current temperature of the fuel heating system is less than a second temperature threshold.

[0054] Based on the relevant descriptions of other embodiments, it can be understood that after identifying the current driving mode of the hybrid vehicle, the present application can also determine whether the engine meets certain preheating conditions. The preheating conditions include but are not limited to the current temperature of the cylinder heating system being less than the first temperature threshold and / or the current temperature of the fuel heating system being less than the second temperature threshold.

[0055] For example, taking 150°C as the first temperature threshold and 20°C as the second temperature threshold, when the temperature of the cylinder heating system is lower than 150°C, the cylinder temperature can be understood to be a bit low, which is not conducive to oil-gas mixing and needs to be heated. It can be determined that the engine meets certain preheating conditions; similarly, when the temperature of the fuel heating system is lower than 20°C, the temperature is also low and not conducive to oil-gas mixing and needs to be heated. It can also be determined that the engine meets certain preheating conditions; for example, when the temperature of the cylinder heating system is lower than 150°C and the temperature of the fuel heating system is lower than 20°C, both are not conducive to oil-gas mixing and both need to be heated. It can also be determined that the engine meets certain preheating conditions.

[0056] It should be noted that the specific preheating conditions and the first temperature threshold and the second temperature threshold can be set by professional and technical personnel in this field according to the actual condition of the vehicle or actual needs based on experience or calibrated based on experiments. This is only an example and no specific requirements are made.

[0057] The embodiment of the present application can further combine the cylinder heating system and the fuel heating system on the basis of identifying the driving mode of the hybrid vehicle to comprehensively determine whether the engine meets certain preheating conditions, thereby effectively improving the accuracy of the present application when performing engine preheating and greatly reducing the waste of resources caused by ineffective heating.

[0058] Step S103: if the engine meets the preheating condition, a heating instruction is generated to start the cylinder heating system and the fuel heating system of the hybrid vehicle by using the heating instruction until the cylinder temperature of the engine reaches the target preheating temperature.

[0059] In the actual implementation process, if the engine meets certain preheating conditions, the hybrid vehicle can generate a heating instruction and send it to the relevant system. The relevant system uses the heating instruction to turn on the cylinder heating system and fuel heating system of the hybrid vehicle until the cylinder temperature of the engine reaches the target preheating temperature. Among them, the target preheating temperature here can be understood as the engine cylinder temperature at which the oil-gas mixed combustion can achieve the best efficiency, such as 200°C, etc., which can be set by professional and technical personnel in this field according to the actual vehicle condition or actual needs based on experience or calibrated according to experiments. This is only an exemplary description and no specific requirements are made.

[0060] For example, after the engine meets certain preheating conditions, the engine can be preheated, which can be achieved by using, but not limited to, the cylinder heating system and the fuel heating system. For example, when the cylinder heating system is lower than 150°C and the fuel heating system is lower than 20°C, the fuel heating system and the cylinder heating system can be turned on.

[0061] Figure 2 This is a schematic diagram of a cylinder heating system according to an embodiment of the present application. Figure 3 This is a schematic diagram of a fuel heating system according to an embodiment of the present application. Figure 2 and Figure 3 As shown, the order of turning on the cylinder heating system for heating can be, but is not limited to, expressed as: 1. Open the switch valve, 2. Wait 0.5s, 3. Turn on the air pump, 4. Wait 0.5s, 5. Turn on the heater for heating; turning on the fuel heating system can directly energize the heating wire for heating.

[0062] Furthermore, after turning on the cylinder heating system and the fuel heating system, the embodiment of the present application can monitor the temperature sensors of the cylinder heating system and the fuel heating system. When the temperature of the cylinder heating system reaches 200°C or above, it can be considered that the inside of the cylinder has been heated. At this time, the cylinder heating system can be turned off. The shutdown sequence can be expressed as: 1. Turn off the heater, 2. Wait for 5s, 3. Turn off the air pump, 4. Wait for 0.5s, 5. Close the switch valve; when the temperature monitoring of the fuel heating system reaches 40°C, it can be considered that the fuel system has been heated, and the fuel heating system is turned off at this time.

[0063] After the cylinder heating system and the fuel heating system are heated, the temperatures of the intake duct, cylinder and catalyst all reach above 200°C, and the fuel temperature reaches above 40°C. At this time, it can be understood that the engine has reached the target preheating temperature. Starting the engine at this time can avoid problems such as poor fuel atomization and incomplete combustion caused by low temperature, thereby optimizing pollutant emissions and NVH (Noise, Vibration, and Harshness, the noise, vibration and acoustic roughness generated by the car during driving) during the cold start phase of the engine.

[0064] In the embodiment of the present application, when the engine meets the pre-heating conditions, the hybrid vehicle can generate a heating command and send it to the cylinder heating system and the fuel heating system, thereby heating the engine until the engine reaches the target heating temperature, effectively increasing the temperature in the engine cylinder, improving the combustion effect of the oil-gas mixture, avoiding problems such as poor fuel atomization and incomplete combustion due to low temperature in the engine cylinder, and thus optimizing pollutant emissions during the cold start phase of the engine.

[0065] Optionally, in one embodiment of the present application, before using a heating instruction to heat the cylinder heating system and the fuel heating system of a hybrid vehicle, it also includes: determining whether the current driving mode is an energy-saving mode; if the driving mode is an energy-saving mode, correcting the fuel injection amount of the heating cylinder heating system and the fuel heating system.

[0066] In some embodiments, the preheating of the engine requires the cylinder heating system and the fuel heating system to be heated to a certain extent, and in this process, a certain amount of resource utilization of the hybrid vehicle will be generated. Considering that some users may choose the energy-saving mode, the present application can first determine whether the current driving mode is the energy-saving mode before using the heating instruction to heat the cylinder heating system and the fuel heating system of the hybrid vehicle.

[0067] If the current driving mode is the energy-saving mode, the embodiment of the present application can consider the actual needs of the user and allow the engine to be started without heating. Furthermore, in this case, the embodiment of the present application can also correct the fuel injection amount of the cylinder heating system and the fuel heating system according to the engine cold start process under normal circumstances, that is, enrich the fuel, and when the engine is started after heating is completed, the enrichment can be stopped.

[0068] The embodiment of the present application can take into account the actual needs of users. When the user selects the energy-saving mode, the heating functions of the cylinder heating system and the fuel heating system are stopped, thereby effectively improving the energy-saving effect. At the same time, the fuel injection amount can be increased according to the needs of the vehicle, thereby effectively improving the fuel economy.

[0069] Optionally, in one embodiment of the present application, before determining whether the current driving mode is the energy-saving mode, it also includes: detecting the initial in-cylinder temperature of the engine; generating an energy-saving prompt when the initial in-cylinder temperature of the engine meets a preset temperature; and controlling the hybrid vehicle to enter the energy-saving mode based on the energy-saving instruction sent by the first user in response to the energy-saving prompt.

[0070] It can be understood that the preset temperature here can be understood as a preset engine cylinder temperature that does not require engine preheating, for example, 180°C, etc. It should be noted that the preset temperature can be set by professional and technical personnel in this field according to the actual condition of the vehicle or actual needs based on experience or calibrated according to experiments. This is only an example and no specific requirements are made.

[0071] In other embodiments, in some cases, the initial in-cylinder temperature of the engine has reached the target temperature, and there is no need to perform preheating operations on the cylinder heating system or the fuel heating system. However, the user has not selected the energy-saving mode at this time. In order to effectively ensure that invalid engine preheating actions are not performed while saving the resources of the hybrid vehicle as much as possible, the present application can provide an energy-saving prompt to the first user, and when the first user responds to the energy-saving instruction generated based on the energy-saving prompt, the hybrid vehicle can be controlled to enter the energy-saving mode.

[0072] For example, when a hybrid vehicle restarts its engine after shutting down the engine for a very short time, the embodiment of the present application can detect the initial in-cylinder temperature of the engine. If it reaches a certain temperature, such as 180°C, then the initial in-cylinder temperature of the engine can effectively meet the requirements of oil-gas mixing efficiency. In order to avoid the waste of resources of the hybrid vehicle, a certain energy-saving prompt can be generated, such as: "It is detected that the current engine temperature has reached 180°C, do you need to turn on the energy-saving mode?" If the first user selects "yes", that is, turns on the energy-saving mode, then the hybrid vehicle can generate an energy-saving instruction and send it to the relevant system to control the vehicle to enter the energy-saving mode.

[0073] The embodiment of the present application can proactively remind and ask the first user whether to enter the energy-saving mode when the initial cylinder temperature of the vehicle reaches a certain temperature, thereby effectively avoiding the waste of vehicle resources, and can improve the human-computer interactivity of the present application and effectively maintain user stickiness.

[0074] Optionally, in one embodiment of the present application, before determining whether the current driving mode is the energy-saving mode, it also includes: identifying the actual driving demand of the second user; and controlling the hybrid vehicle to enter the energy-saving mode when the actual driving demand is the energy-saving demand.

[0075] In certain embodiments, in addition to generating energy-saving prompts based on the initial in-cylinder temperature of the engine to effectively save resources of the hybrid vehicle for the first user, the present application can also intelligently identify the actual driving needs of the second user, and control the hybrid vehicle to enter an energy-saving mode when it is identified that the user's actual driving needs are energy-saving needs.

[0076] For example, the hybrid vehicle is currently driven by a second user. After an energy-saving prompt is generated and inquiry options are given, the second user does not give any option. Then, when it is identified that the temperature in the engine cylinder has met certain temperature requirements, the present application can identify the actual driving needs of the second user, such as whether the second user's last driving mode was an energy-saving mode, or whether the current vehicle driving condition is an energy-saving driving mode, or whether most of the historical driving records are energy-saving modes; if the second user's last driving mode was an energy-saving mode, or the current vehicle driving condition is an energy-saving driving mode, or most of the modes selected by the second user in the historical driving records are energy-saving modes, then the second user's actual driving need can be identified as an energy-saving need, and in this case the hybrid vehicle can be intelligently and actively controlled to enter the energy-saving mode.

[0077] It should be noted that the first user and the second user here are distinguished by their names only for the convenience of explanation of the embodiment. In actual scenarios, the first user may enter the energy-saving mode after responding to the energy-saving prompt, or the first user may not respond to the energy-saving prompt and the hybrid vehicle may be automatically controlled to enter the energy-saving mode based on the first user's last / historical record or the current driving condition; the second user may enter the energy-saving mode after responding to the energy-saving prompt, or the second user may not respond to the energy-saving prompt and the hybrid vehicle may be automatically controlled to enter the energy-saving mode based on the second user's last / historical record or the current driving condition.

[0078] The embodiment of the present application can identify the actual driving needs of the second user, and actively control the hybrid vehicle to enter the energy-saving mode when the actual driving demand is an energy-saving demand, which greatly improves the intelligence level of the present application and can meet the needs of users in different scenarios, effectively improving the actual application scope of the present application and facilitating implementation and promotion.

[0079] Next, the present application is described in detail with reference to a specific embodiment.

[0080] Figure 4 This is a flow chart of a control method for engine preheating according to an embodiment of the present application. Figure 4 As shown:

[0081] Step S401, start.

[0082] Step S402, detecting the current SOC of the power battery of the hybrid vehicle, and detecting whether the current SOC of the power battery minus the economic starting threshold is less than 5, if not less than 5, returning to continue the detection, if less than 5, proceeding to the next step;

[0083] Step S403, when the current SOC of the power battery minus the economical starting threshold is less than 5, it is detected whether the driver has set the energy-saving mode. If the energy-saving mode is set, the heating procedure is not performed, and the fuel is enriched according to the normal engine cold start method, so that the normal start of the engine can be effectively guaranteed in the case of energy saving;

[0084] Step S404, when the driver does not turn on the energy-saving mode, turn on the cylinder heating system;

[0085] Step S405, when the driver does not turn on the energy-saving mode, turn on the fuel heating system;

[0086] Step S406, using the temperature sensor of the cylinder heating system to detect in real time whether the cylinder heating system has reached 200°C, and if not, continue heating;

[0087] Step S407, using the temperature sensor of the fuel heating system to detect in real time whether the fuel heating system has reached 40°C, and if not, continue heating;

[0088] Step S408, when the cylinder heating system reaches 200°C, turn off the cylinder heating system;

[0089] Step S409, when the temperature of the fuel heating system reaches 40°C, shut down the fuel heating system;

[0090] Step S410: the engine preheating is completed and the heating process is ended. At this time, the temperature in the cylinder is relatively high, which can effectively improve the oil-gas mixing during the cold start phase of the engine, improve the combustion state, and thus effectively reduce the emission of pollutants.

[0091] According to the engine preheating method proposed in the embodiment of the present application, when it is detected that the current SOC of the power battery of the hybrid vehicle meets certain requirements and the engine meets certain preheating conditions, the cylinder heating system and the fuel heating system can be turned on to preheat the engine. Thus, the fuel, intake duct and cylinder of the engine are heated before the hybrid vehicle engine is started through the cylinder heating system, the fuel heating system, the gas heating and the gas circulation device, so as to increase the cylinder temperature during the initial ignition of the engine, thereby improving the oil-gas mixing during the cold start phase of the engine, improving the combustion state, and finally achieving the reduction of pollutant emissions. In addition, the present application can also assist in improving the NVH characteristics of the engine during cold start, reduce the fuel enrichment at the start time, and thus improve the vehicle economy. Thus, the problems in the related art that the engine of the vehicle is started in a cold engine state will lead to poor fuel combustion, the method is relatively single, and it cannot effectively meet the user's use needs in different scenarios, the user stickiness is poor, and the waste of resources will increase the emission of pollutants.

[0092] Next, the engine preheating device proposed according to the embodiment of the present application is described with reference to the accompanying drawings.

[0093] Figure 5 It is a schematic diagram of the structure of the engine preheating device according to an embodiment of the present application.

[0094] like Figure 5 As shown, the engine preheating device 10 includes: a first detection module 100 , a first judgment module 200 and a heating module 300 .

[0095] The first detection module 100 is used to detect the current battery state of charge SOC of the power battery of the hybrid vehicle.

[0096] The first judgment module 200 is used to identify the current driving mode of the hybrid vehicle when the current SOC reaches a preset threshold, and judge whether the engine meets the corresponding preheating condition based on the current driving mode.

[0097] The heating module 300 is used to generate a heating instruction when the engine meets the preheating conditions, so as to use the heating instruction to start the cylinder heating system and the fuel heating system of the hybrid vehicle until the cylinder temperature of the engine reaches the target preheating temperature.

[0098] Optionally, in one embodiment of the present application, it further includes: a second judgment module and a correction module.

[0099] The second judgment module is used to judge whether the current driving mode is an energy-saving mode before heating the cylinder heating system and the fuel heating system of the hybrid vehicle using the heating instruction.

[0100] The correction module is used for correcting the fuel injection amount of the heated cylinder heating system and the fuel heating system when the driving mode is the energy-saving mode.

[0101] Optionally, in one embodiment of the present application, the preheating condition includes that the current temperature of the cylinder heating system is less than a first temperature threshold and / or the current temperature of the fuel heating system is less than a second temperature threshold.

[0102] Optionally, in one embodiment of the present application, it further includes: a second detection module, a generation module and a first control module.

[0103] The second detection module is used to detect the initial in-cylinder temperature of the engine before determining whether the current driving mode is the energy-saving mode.

[0104] The generating module is used to generate an energy-saving prompt when the initial cylinder temperature of the engine meets a preset temperature.

[0105] The first control module is used to control the hybrid vehicle to enter an energy-saving mode based on an energy-saving instruction sent by the first user in response to the energy-saving prompt.

[0106] Optionally, in one embodiment of the present application, it further includes: an identification module and a second control module.

[0107] The identification module is used to identify the actual driving demand of the second user before determining whether the current driving mode is the energy-saving mode.

[0108] The second control module is used to control the hybrid vehicle to enter an energy-saving mode when the actual driving demand is an energy-saving demand.

[0109] It should be noted that the above explanation of the engine preheating method embodiment is also applicable to the engine preheating device of this embodiment, and will not be repeated here.

[0110] According to the engine preheating device proposed in the embodiment of the present application, when it is detected that the current SOC of the power battery of the hybrid vehicle meets certain requirements and the engine meets certain preheating conditions, the cylinder heating system and the fuel heating system can be turned on to preheat the engine. Thus, the fuel, intake duct and cylinder of the engine are heated before the hybrid vehicle engine is started through the cylinder heating system, the fuel heating system, the gas heating and the gas circulation device, so as to increase the cylinder temperature during the initial ignition of the engine, thereby improving the oil-gas mixing during the cold start phase of the engine, improving the combustion state, and finally achieving the reduction of pollutant emissions. In addition, the present application can also assist in improving the NVH characteristics of the engine during cold start, reduce the fuel enrichment at the start time, and thus improve the economy of the vehicle. Thus, the problems in the related art that the fuel combustion is poor when the engine of the vehicle is started in a cold engine state, the method is relatively single, and it cannot effectively meet the user's use needs in different scenarios, the user stickiness is poor, and the waste of resources will increase the emission of pollutants.

[0111] Figure 6 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0112] A memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0113] When the processor 602 executes the program, the engine preheating method provided in the above embodiment is implemented.

[0114] Furthermore, the vehicle also includes:

[0115] The communication interface 603 is used for communication between the memory 601 and the processor 602 .

[0116] The memory 601 is used to store computer programs that can be executed on the processor 602 .

[0117] The memory 601 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.

[0118] If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 can be connected to each other through 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 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0119] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can communicate with each other through an internal interface.

[0120] The processor 602 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0121] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned engine preheating method.

[0122] An embodiment of the present application also provides a computer program product, including a computer program, which can run computer instructions. When the computer instructions are executed by a processor, the engine preheating method provided in the embodiment of the present application is implemented.

[0123] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0124] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0125] 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 the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0126] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk 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 may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0127] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of multiple of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0128] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0129] In addition, each functional unit in each embodiment 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 one 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.

[0130] 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 can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for preheating an engine, characterized in that: The following steps are involved: Detecting a current battery state of charge (SOC) of a power battery of a hybrid vehicle; When the current SOC reaches a preset threshold, identifying a current driving mode of the hybrid vehicle, and determining whether the engine meets a corresponding preheating condition based on the current driving mode; If the engine meets the preheating condition, a heating instruction is generated to turn on the cylinder heating system and the fuel heating system of the hybrid vehicle by using the heating instruction until the in-cylinder temperature of the engine reaches a target preheating temperature.

2. The method according to claim 1, characterized in that Before using the heating instruction to heat the cylinder heating system and the fuel heating system of the hybrid vehicle, the method further includes: Determining whether the current driving mode is an energy-saving mode; If the driving mode is the energy saving mode, the fuel injection amount for heating the cylinder heating system and the fuel heating system is corrected.

3. The method according to claim 1, characterized in that The preheating condition includes that the current temperature of the cylinder heating system is less than a first temperature threshold and / or the current temperature of the fuel heating system is less than a second temperature threshold.

4. The method according to claim 1, characterized in that Before determining whether the current driving mode is the energy-saving mode, the method further includes: detecting an initial in-cylinder temperature of the engine; When the initial in-cylinder temperature of the engine meets a preset temperature, generating an energy-saving prompt; Based on an energy-saving instruction sent by the first user in response to the energy-saving prompt, the hybrid vehicle is controlled to enter the energy-saving mode.

5. The method according to claim 1, characterized in that Before determining whether the current driving mode is the energy-saving mode, the method further includes: identifying the actual driving needs of the second user; When the actual driving demand is an energy-saving demand, the hybrid vehicle is controlled to enter the energy-saving mode.

6. A preheating device for an engine, characterized in that: include: A detection module, used to detect the current battery state of charge SOC of the power battery of the hybrid vehicle; a first judgment module, configured to identify a current driving mode of the hybrid vehicle when the current SOC reaches a preset threshold, and to judge whether the engine meets a corresponding preheating condition based on the current driving mode; The heating module is used to generate a heating instruction when the engine meets the preheating conditions, so as to use the heating instruction to start the cylinder heating system and the fuel heating system of the hybrid vehicle until the cylinder temperature of the engine reaches the target preheating temperature.

7. The device according to claim 6, characterized in that Also includes: A second judgment module is used to judge whether the current driving mode is an energy-saving mode before heating the cylinder heating system and the fuel heating system of the hybrid vehicle using the heating instruction; The correction module is used to correct the fuel injection amount for heating the cylinder heating system and the fuel heating system when the driving mode is the energy-saving mode.

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 engine preheating 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 engine preheating method as described in 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 engine preheating method according to any one of claims 1 to 5.

Images