Method, device, vehicle, medium and program product for preheating an engine
By detecting the SOC of the power battery and the driving mode, and using the cylinder heating system and fuel heating system to preheat the engine, the problem of poor combustion performance during cold starts of the engine is solved, the combustion state is improved and pollutant emissions are reduced, and the vehicle's economy is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA FAW CO LTD
- Filing Date
- 2024-10-28
- Publication Date
- 2026-07-03
AI Technical Summary
During the cold start phase, the fuel combustion of the engine is poor, and the single method cannot meet the needs of different usage scenarios, resulting in resource waste and increased pollutant emissions.
By detecting the SOC of the power battery and the driving mode, it is determined whether the engine meets the preheating conditions. The engine is then preheated using the cylinder heating system and the fuel heating system until the cylinder temperature reaches the target temperature.
It improves the air-fuel mixture during engine cold starts, reduces pollutant emissions, enhances combustion performance, and improves vehicle economy and NVH characteristics.
Smart Images
Figure CN119435270B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hybrid vehicle technology, and in particular to an engine preheating method, device, vehicle, medium, and program product. Background Technology
[0002] In related technologies, engine starting focuses primarily on how to start quickly or make intelligent adjustments to save fuel injection volume, with less research on the resulting pollutant emissions. During the cold start phase, engines typically inject fuel directly. At this time, the engine is cold, the intake manifold, cylinder walls, and fuel temperature are low, fuel volatility is poor, and it cannot mix completely with air, resulting in poor combustion.
[0003] However, in related technologies, starting a vehicle engine when it is cold results in poor fuel combustion. The methods are relatively simple and cannot effectively meet the user's needs in different scenarios. This leads to poor user stickiness, wastes resources, and increases pollutant emissions, which urgently needs to be addressed. Summary of the Invention
[0004] This application provides a method, device, vehicle, medium, and program product for preheating an engine, in order to solve the problems in the related art where starting a vehicle engine in a cold state leads to poor fuel combustion, the methods are relatively simple and cannot effectively meet the user's needs in different scenarios, resulting in poor user stickiness, wasting resources, and increasing pollutant emissions.
[0005] The first aspect of this application provides a method for preheating an engine, comprising the following steps: detecting the current state of charge (SOC) of the power battery of a hybrid vehicle; 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 conditions based on the current driving mode; if the engine meets the preheating conditions, generating a heating command to activate the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command until the cylinder temperature of the engine reaches the target preheating temperature.
[0006] Through the aforementioned technical means, the embodiments of this application can activate the cylinder heating system and fuel heating system to preheat the engine when the current SOC of the hybrid vehicle's power battery meets certain requirements and the engine meets certain preheating conditions. This achieves the heating of the engine's fuel, intake manifold, and cylinder interior before engine start-up via the cylinder heating system, fuel heating system, and gas heating and recirculation device. This increases the in-cylinder temperature at initial ignition, thereby improving the air-fuel mixture during cold start, improving combustion, and ultimately reducing pollutant emissions.
[0007] Optionally, in one embodiment of this application, before heating the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command, the method further includes: determining whether the current driving mode is an energy-saving mode; if the driving mode is the energy-saving mode, then adjusting the fuel injection quantity for heating the cylinder heating system and fuel heating system.
[0008] Through the above-mentioned technical means, the embodiments of this application can take into account the actual needs of users, and stop the heating function of the cylinder heating system and the fuel heating system when the user selects the energy-saving mode, effectively improving the energy-saving effect. At the same time, it can take into account the needs of the vehicle to increase the fuel injection quantity, thereby effectively improving fuel economy.
[0009] Optionally, in one embodiment of this application, the preheating conditions include the current temperature of the cylinder heating system being less than a first temperature threshold and / or the current temperature of the fuel heating system being less than a second temperature threshold.
[0010] Through the above-mentioned technical means, the embodiments of this application can further combine the cylinder heating system and the fuel heating system to comprehensively judge whether the engine meets certain preheating conditions based on the identification of the driving mode of the hybrid vehicle. This effectively improves the accuracy of the engine preheating in this application and greatly reduces the waste of resources caused by ineffective heating.
[0011] Optionally, in one embodiment of this application, before determining whether the current driving mode is an energy-saving mode, the method further 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 command sent by a first user in response to the energy-saving prompt.
[0012] Through the above-mentioned technical means, the embodiments of this application can proactively remind and ask the first user whether they need 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 improving the human-computer interaction of this application, effectively maintaining user stickiness.
[0013] Optionally, in one embodiment of this application, before determining whether the current driving mode is an energy-saving mode, the method further includes: identifying the actual driving needs of the second user; and if 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 embodiments of this 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 needs are energy-saving needs. This greatly improves the intelligence level of this application and can meet the needs of users in different scenarios, effectively expanding the practical application scope of this application and facilitating its implementation and promotion.
[0015] A second aspect of this application provides an engine preheating device, comprising: a first detection module for detecting the current state of charge (SOC) of the power battery of a hybrid vehicle; a first judgment module for identifying the current driving mode of the hybrid vehicle when the current SOC reaches a preset threshold, and judging whether the engine meets the corresponding preheating conditions based on the current driving mode; and a heating module for generating a heating command when the engine meets the preheating conditions, so as to activate the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command until the cylinder temperature of the engine reaches the target preheating temperature.
[0016] Through the aforementioned technical means, the embodiments of this application can activate the cylinder heating system and fuel heating system to preheat the engine when the current SOC of the hybrid vehicle's power battery meets certain requirements and the engine meets certain preheating conditions. This achieves the heating of the engine's fuel, intake manifold, and cylinder interior before engine start-up via the cylinder heating system, fuel heating system, and gas heating and recirculation device. This increases the in-cylinder temperature at initial ignition, thereby improving the air-fuel mixture during cold start, improving combustion, and ultimately reducing pollutant emissions.
[0017] Optionally, in one embodiment of this application, it further includes: a second determination module, configured to determine whether the current driving mode is an energy-saving mode before heating the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command; and a correction module, configured to correct the fuel injection quantity for heating the cylinder heating system and fuel heating system when the driving mode is the energy-saving mode.
[0018] Through the above-mentioned technical means, the embodiments of this application can take into account the actual needs of users, and stop the heating function of the cylinder heating system and the fuel heating system when the user selects the energy-saving mode, effectively improving the energy-saving effect. At the same time, it can take into account the needs of the vehicle to increase the fuel injection quantity, thereby effectively improving fuel economy.
[0019] Optionally, in one embodiment of this application, the preheating conditions include the current temperature of the cylinder heating system being less than a first temperature threshold and / or the current temperature of the fuel heating system being less than a second temperature threshold.
[0020] Through the above-mentioned technical means, the embodiments of this application can further combine the cylinder heating system and the fuel heating system to comprehensively judge whether the engine meets certain preheating conditions based on the identification of the driving mode of the hybrid vehicle. This effectively improves the accuracy of the engine preheating in this application and greatly reduces the waste of resources caused by ineffective heating.
[0021] Optionally, in one embodiment of this application, it further includes: a second detection module, used to detect the initial in-cylinder temperature of the engine before determining whether the current driving mode is an 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; and a first control module, used to control the hybrid vehicle to enter the energy-saving mode based on an energy-saving command sent by a first user in response to the energy-saving prompt.
[0022] Through the above-mentioned technical means, the embodiments of this application can proactively remind and ask the first user whether they need 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 improving the human-computer interaction of this application, effectively maintaining user stickiness.
[0023] Optionally, in one embodiment of this application, it further includes: an identification module, configured to identify the actual driving needs of the second user before determining whether the current driving mode is an energy-saving mode; and a second control module, configured to control the hybrid vehicle to enter the energy-saving mode when the actual driving needs are energy-saving needs.
[0024] Through the above-mentioned technical means, the embodiments of this 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 needs are energy-saving needs. This greatly improves the intelligence level of this application and can meet the needs of users in different scenarios, effectively expanding the practical application scope of this application and facilitating its implementation and promotion.
[0025] A third aspect of this application provides a vehicle comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the engine preheating method as described in the above embodiments.
[0026] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the engine preheating method described above.
[0027] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, is used to implement the engine preheating method described above.
[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0029] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:
[0030] Figure 1 This is a flowchart illustrating a preheating method for an engine according to an embodiment of this application;
[0031] Figure 2 This is a schematic diagram of a cylinder heating system according to an embodiment of this application;
[0032] Figure 3 This is a schematic diagram of a fuel heating system according to an embodiment of this application;
[0033] Figure 4 This is a flowchart of a control method for engine preheating according to an embodiment of this application;
[0034] Figure 5 This is a schematic diagram of the structure of the engine preheating device provided according to an embodiment of this application;
[0035] Figure 6 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application.
[0036] Figure label:
[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 Implementation
[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0039] The following description, with reference to the accompanying drawings, describes an engine preheating method, apparatus, vehicle, medium, and program product according to embodiments of this application. Addressing the issues mentioned in the background art where starting a vehicle engine in a cold state leads to poor fuel combustion, the methods are limited and cannot effectively meet user needs in different scenarios, resulting in poor user stickiness, wasted resources, and increased pollutant emissions, this application provides an engine preheating method. In this method, when the current SOC of the hybrid vehicle's power battery meets certain requirements and the engine meets certain preheating conditions, the cylinder heating system and fuel heating system are activated to preheat the engine. This achieves heating of the engine's fuel, intake manifold, and cylinder interior before engine start-up via the cylinder heating system, fuel heating system, gas heating, and gas circulation device. This increases the cylinder temperature at initial ignition, thereby improving fuel-air mixing during cold start, improving combustion, and ultimately reducing pollutant emissions. Furthermore, this application can also help improve engine NVH characteristics during cold start, reduce fuel enrichment at start-up, and improve vehicle economy. This solves the problems in related technologies, such as poor fuel combustion when the vehicle engine is started in a cold state, the limited range of methods, the inability to effectively meet user needs in different scenarios, poor user stickiness, waste of resources, and increased pollutant emissions.
[0040] Specifically, Figure 1 This is a flowchart illustrating an engine preheating method provided in an embodiment of this application.
[0041] like Figure 1 As shown, the engine preheating method includes the following steps:
[0042] In step S101, the current 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 inside the engine cylinders is low, which is a cold start phase. Directly adding fuel to heat the engine during this phase can result in poor heating efficiency. Furthermore, because the intake manifold, cylinder walls, and fuel temperatures are low during the cold start phase, the fuel's volatility is low, preventing complete mixing with air and leading to poor combustion and increased pollutant emissions. Therefore, preheating the engine becomes necessary.
[0044] To preheat the engine, it is necessary to first determine whether the engine is running. For hybrid vehicles, this application embodiment 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 this embodiment of the application, the detection of the current SOC of the power battery of the hybrid vehicle can be achieved, but is not limited to, through the battery management system (BMS) of the hybrid vehicle. The battery management system monitors parameters such as voltage, current, and temperature of the power battery in real time through a series of sensors and algorithms, and calculates the SOC of the power battery through complex algorithms based on these parameters and information such as the battery's capacity characteristics.
[0046] The embodiments of this application can detect the current SOC of the power battery of a hybrid vehicle to determine whether the engine should start. This is highly intelligent and avoids situations such as ineffective heating, which can effectively save the vehicle's heating resources.
[0047] Step S102: When the current SOC reaches a preset threshold, identify the current driving mode of the hybrid vehicle, and determine whether the engine meets the corresponding preheating conditions based on the current driving mode.
[0048] It is understandable that the preset threshold here can be interpreted as a pre-set threshold for the SOC of the hybrid vehicle's power battery. When the current SOC of the power battery reaches this threshold, it can be determined through certain methods that the hybrid vehicle's engine has started. It should be noted that the specific threshold can be set by those skilled in the art based on experience or calibrated through experiments according to the actual vehicle condition or actual needs. This is only an illustrative example and no specific requirements are made.
[0049] In some embodiments, after detecting the current SOC of the power battery, this application can determine that the engine is about to start when the current SOC reaches a certain threshold. For example, in a hybrid vehicle, the current SOC of the power battery is monitored in real time after the vehicle is started. If the current SOC reaches a certain threshold, and the difference between the current SOC and the economic start-up SOC is less than 5, it can be determined that the engine is about to start. Here, the economic start-up SOC can be understood as the engine start-up SOC of the hybrid vehicle under economical conditions.
[0050] Furthermore, after detecting that the current SOC has reached a certain threshold and the engine is about to start, this embodiment of the application also needs to identify the current driving mode of the hybrid vehicle, that is, whether it is a mode in which engine preheating can be performed. For example, when the vehicle's driving mode is normal mode, engine preheating can be performed normally; if the vehicle's driving mode is energy-saving mode, engine preheating cannot be performed at this time.
[0051] In addition to recognizing driving modes, embodiments of this application can also determine whether the engine meets certain preheating conditions. For example, if the current engine temperature has already reached a relatively standard or high temperature, then engine preheating is not required.
[0052] The embodiments of this application can determine whether engine preheating is needed when the current SOC of the power battery of a hybrid vehicle reaches a certain threshold by using the vehicle's driving mode. Furthermore, it can also make a further judgment based on whether the engine meets certain preheating conditions, which effectively improves the rigor and reliability of this application and ensures that engine preheating is carried out under conditions that are permissible and safe for the vehicle.
[0053] Optionally, in one embodiment of this application, the preheating conditions include the current temperature of the cylinder heating system being less than a first temperature threshold and / or the current temperature of the fuel heating system being less than a second temperature threshold.
[0054] Based on the descriptions of other embodiments, it will be understood that after identifying the current driving mode of the hybrid vehicle, this application can also determine whether the engine meets certain preheating conditions. These preheating conditions include, but are not limited to, the current temperature of the cylinder heating system being less than a first temperature threshold and / or the current temperature of the fuel heating system being less than a second temperature threshold.
[0055] For example, using 150℃ as the first temperature threshold and 20℃ as the second temperature threshold, when the cylinder heating system temperature is below 150℃, the cylinder temperature can be considered somewhat low, which is not conducive to air-fuel mixing and requires heating. This indicates that the engine meets certain preheating conditions. Similarly, when the fuel heating system temperature is below 20℃, the temperature is also low and not conducive to air-fuel mixing, requiring heating. This also indicates that the engine meets certain preheating conditions. Furthermore, when both the cylinder heating system temperature is below 150℃ and the fuel heating system temperature is below 20℃, both are not conducive to air-fuel mixing and require heating. This also indicates that the engine meets certain preheating conditions.
[0056] It should be noted that the specific preheating conditions and the first and second temperature thresholds can be set by professionals in the field based on experience or calibrated by experiments according to the actual vehicle condition or actual needs. This is only an example and no specific requirements are made.
[0057] The embodiments of this application can further combine the cylinder heating system and the fuel heating system to comprehensively determine whether the engine meets certain preheating conditions based on the identification of the driving mode of the hybrid vehicle. This effectively improves the accuracy of the engine preheating in this application and greatly reduces the waste of resources caused by ineffective heating.
[0058] In step S103, if the engine meets the preheating conditions, a heating command is generated to activate the cylinder heating system and fuel heating system of the hybrid vehicle until the engine cylinder temperature reaches the target preheating temperature.
[0059] In actual operation, if the engine meets certain preheating conditions, the hybrid vehicle can generate a heating command and send it to the relevant systems. These systems then activate the hybrid vehicle's cylinder heating and fuel heating systems until the engine's cylinder temperature reaches the target preheating temperature. Here, the target preheating temperature can be understood as the engine cylinder temperature at which the air-fuel mixture achieves optimal combustion efficiency, such as 200°C. The specific temperature can be set by those skilled in the art based on experience or calibrated experimentally according to the vehicle's actual condition or specific needs. This is merely an example and no specific requirements are made.
[0060] For example, once the engine meets certain preheating conditions, it can be preheated, which can be achieved, but is not limited to, using the cylinder heating system and the fuel heating system. For example, if the cylinder heating system is below 150°C and the fuel heating system is below 20°C, both 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 this application. Figure 3 This is a schematic diagram of a fuel heating system according to an embodiment of this application. Figure 2 and Figure 3 As shown, the sequence of turning on the cylinder heating system for heating can be, but is not limited to, as follows: 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 embodiments of this 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 cylinder has been heated completely. At this time, the cylinder heating system can be turned off. The shutdown sequence can be described as follows: 1. Turn off the heater, 2. Wait 5 seconds, 3. Turn off the air pump, 4. Wait 0.5 seconds, 5. Turn off the switch valve. When the temperature of the fuel heating system reaches 40°C, it can be considered that the fuel system has been heated completely. At this time, the fuel heating system can be turned off.
[0063] After the cylinder heating system and fuel heating system are heated, the temperature of the intake manifold, cylinder, and catalytic converter all reach above 200°C, and the fuel temperature reaches above 40°C. At this point, the engine can be considered to have 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) during the engine cold start phase.
[0064] In this embodiment, when the engine meets the preheating conditions, the hybrid vehicle generates a heating command and sends it to the cylinder heating system and the fuel heating system, thereby heating the engine until it reaches the target heating temperature. This effectively increases the engine cylinder temperature, improves the combustion effect of the air-fuel mixture, and avoids problems such as poor fuel atomization and incomplete combustion caused by low engine cylinder temperature, thereby optimizing pollutant emissions during the engine cold start phase.
[0065] Optionally, in one embodiment of this application, before heating the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command, the method further includes: determining whether the current driving mode is an energy-saving mode; if the driving mode is an energy-saving mode, then adjusting the fuel injection quantity of the cylinder heating system and fuel heating system.
[0066] In some embodiments, engine preheating requires heating from both the cylinder heating system and the fuel heating system, which results in some resource utilization by the hybrid vehicle. Considering that some users may choose energy-saving mode, this application can determine whether the current driving mode is energy-saving mode before using heating commands to heat the cylinder heating system and fuel heating system of the hybrid vehicle.
[0067] If the current driving mode is energy-saving mode, this embodiment of the application can consider the user's actual needs and allow the engine to start without heating. Furthermore, in this case, this embodiment of the application can also adjust the fuel injection quantity of the cylinder heating system and fuel heating system according to the conventional engine cold start process, i.e., enrich the fuel. Once the engine has finished heating and is started, the enrichment process can be stopped.
[0068] This application embodiment can take into account the actual needs of users, and stop the heating function of the cylinder heating system and fuel heating system when the user selects the energy-saving mode, effectively improving the energy-saving effect. At the same time, it can take into account the needs of the vehicle to increase the fuel injection quantity, thereby effectively improving fuel economy.
[0069] Optionally, in one embodiment of this application, before determining whether the current driving mode is an energy-saving mode, the method further 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 command sent by the first user in response to the energy-saving prompt.
[0070] It is understood that the preset temperature here can be understood as a pre-set engine cylinder temperature that does not require engine preheating, such as 180°C. It should be noted that the preset temperature can be set by professionals in the field based on experience or calibrated by experiments according to the actual vehicle condition or actual needs. This is only an example and no specific requirements are made.
[0071] In some embodiments, the initial cylinder temperature of the engine has already reached the target temperature, and there is no need for preheating operation of the cylinder heating system or fuel heating system. However, the user has not selected the energy-saving mode at this time. In order to effectively ensure that the engine preheating action is not performed ineffectively while saving the resources of the hybrid vehicle as much as possible, this application can provide an energy-saving prompt to the first user, and control the hybrid vehicle to enter the energy-saving mode when the first user responds to the energy-saving command generated based on the energy-saving prompt.
[0072] For example, if a hybrid vehicle restarts its engine after a very short period of time following a shutdown, this embodiment of the 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 can effectively meet the requirements for fuel-air mixing efficiency. To avoid wasting resources in the hybrid vehicle, a certain energy-saving prompt can be generated, such as: "The current engine temperature has reached 180°C. Do you need to activate energy-saving mode?" If the first user selects "yes," that is, to activate energy-saving mode, then the hybrid vehicle can generate an energy-saving command and send it to the relevant system to control the vehicle to enter energy-saving mode.
[0073] This application embodiment can proactively remind and ask the first user whether they need to enter the energy-saving mode when the initial cylinder temperature of the vehicle reaches a certain temperature. This effectively avoids the waste of vehicle resources and can improve the human-computer interaction of this application, effectively maintaining user stickiness.
[0074] Optionally, in one embodiment of this application, before determining whether the current driving mode is an energy-saving mode, the method further includes: identifying the actual driving needs of the second user; and controlling the hybrid vehicle to enter the energy-saving mode if the actual driving needs are energy-saving needs.
[0075] In some embodiments, in addition to generating energy-saving prompts based on the initial cylinder temperature of the engine to effectively save resources of the hybrid vehicle for the first user, this application can also intelligently identify the actual driving needs of the second user, and control the hybrid vehicle to enter the energy-saving mode when the user's actual driving needs are identified as energy-saving needs.
[0076] For example, if the hybrid vehicle is currently being driven by a second user, and after generating an energy-saving prompt and providing an option, the second user does not provide any option, then, if it is recognized that the engine cylinder temperature has met a certain temperature requirement, this application can identify the second user's actual driving needs. For example, whether the second user's last driving mode was energy-saving mode, or whether the current vehicle driving condition is energy-saving driving mode, or whether the historical driving record shows that the second user has mostly selected energy-saving mode; if the second user's last driving mode was energy-saving mode, or the current vehicle driving condition is energy-saving driving mode, or if the second user's selected mode in the historical driving record is mostly energy-saving mode, then the second user's actual driving needs can be identified as energy-saving needs, and in this case, the hybrid vehicle can be intelligently and proactively controlled to enter energy-saving mode.
[0077] It should be noted that the terms "first user" and "second user" are used here only for the convenience of explaining the embodiments. In actual scenarios, the first user may enter the energy-saving mode after responding to the energy-saving prompt, or the hybrid vehicle may automatically enter the energy-saving mode based on the first user's last / historical records or current driving conditions if the first user does not respond to the energy-saving prompt. Alternatively, the second user may enter the energy-saving mode after responding to the energy-saving prompt, or the hybrid vehicle may automatically enter the energy-saving mode based on the second user's last / historical records or current driving conditions if the second user does not respond to the energy-saving prompt.
[0078] The embodiments of this application can identify the actual driving needs of a second user and actively control the hybrid vehicle to enter the energy-saving mode when the actual driving needs are energy-saving needs. This greatly improves the intelligence level of this application and can meet the needs of users in different scenarios, effectively expanding the practical application scope of this application and facilitating its implementation and promotion.
[0079] The present application will now be described in detail with reference to a specific embodiment.
[0080] Figure 4 This is a flowchart of a control method for engine preheating according to an embodiment of this application, as follows: Figure 4 As shown:
[0081] Step S401, Begin.
[0082] Step S402: Detect the current SOC of the power battery of the hybrid vehicle, and detect whether the current SOC of the power battery minus the economic start-up threshold is less than 5. If it is not less than 5, return to continue the detection. If it is less than 5, proceed to the next step.
[0083] Step S403: If the current SOC of the power battery minus the economic start threshold is less than 5, check whether the driver has set the energy-saving mode. If the energy-saving mode is set, the heating program will not be performed, and the fuel will be enriched according to the normal engine cold start method, so as to effectively ensure the normal start of the engine while saving energy.
[0084] Step S404: Activate the cylinder heating system if the driver has not activated the energy-saving mode;
[0085] Step S405: Activate the fuel heating system if the driver has not activated the energy-saving mode;
[0086] Step S406: The temperature sensor of the cylinder heating system detects in real time whether the cylinder heating system has reached 200°C. If it has not reached 200°C, heating continues.
[0087] Step S407: The temperature sensor of the fuel heating system detects in real time whether the fuel heating system has reached 40°C. If it has not reached 40°C, heating continues.
[0088] Step S408: When the cylinder heating system reaches 200°C, turn off the cylinder heating system;
[0089] Step S409: When the fuel heating system reaches 40°C, turn off the fuel heating system;
[0090] In step S410, engine preheating is complete, and the heating process ends. At this time, the cylinder temperature is relatively high, which can effectively improve the air-fuel mixture during the engine's cold start phase, improve the combustion state, and thus effectively reduce pollutant emissions.
[0091] The engine preheating method proposed in this application preheats the engine by activating the cylinder heating system and fuel heating system when the current SOC of the hybrid vehicle's power battery meets certain requirements and the engine meets certain preheating conditions. This achieves preheating of the engine's fuel, intake manifold, and cylinder interior before engine start-up through the cylinder heating system, fuel heating system, gas heating, and gas circulation device. This increases the in-cylinder temperature at initial ignition, improving air-fuel mixing during cold starts, enhancing combustion, and ultimately reducing emissions. Furthermore, this application can also improve engine NVH characteristics during cold starts and reduce fuel enrichment during startup, thereby improving vehicle fuel economy. This solves the problems in related technologies where engine start-up in cold conditions leads to poor fuel combustion, the methods are limited, and they fail to effectively meet user needs in different scenarios, resulting in low user engagement, wasted resources, and increased emissions.
[0092] Next, the engine preheating device according to an embodiment of this application is described with reference to the accompanying drawings.
[0093] Figure 5 This is a schematic diagram of the structure of the engine preheating device according to an embodiment of this 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 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 to determine whether the engine meets the corresponding preheating conditions based on the current driving mode.
[0097] The heating module 300 is used to generate a heating command when the engine meets the preheating conditions, so as to activate the cylinder heating system and 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 this application, it further includes: a second determination module and a correction module.
[0099] The second judgment module is used to determine whether the current driving mode is energy-saving mode before using heating commands to heat the cylinder heating system and fuel heating system of the hybrid vehicle.
[0100] The correction module is used to correct the fuel injection quantity of the heated cylinder heating system and the fuel heating system when the driving mode is in eco mode.
[0101] Optionally, in one embodiment of this application, the preheating conditions include the current temperature of the cylinder heating system being less than a first temperature threshold and / or the current temperature of the fuel heating system being less than a second temperature threshold.
[0102] Optionally, in one embodiment of this 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 cylinder temperature of the engine before determining whether the current driving mode is energy-saving mode.
[0104] The generation module is used to generate an energy-saving prompt when the initial in-cylinder temperature of the engine meets the preset temperature.
[0105] The first control module is used to control the hybrid vehicle to enter the energy-saving mode based on the energy-saving command sent by the first user in response to the energy-saving prompt.
[0106] Optionally, in one embodiment of this application, it further includes: an identification module and a second control module.
[0107] The identification module is used to identify the actual driving needs of the second user before determining whether the current driving mode is energy-saving mode.
[0108] The second control module is used to control the hybrid vehicle to enter energy-saving mode when the actual driving demand is energy saving.
[0109] It should be noted that the explanation of the aforementioned embodiment of the engine preheating method also applies to the engine preheating device of this embodiment, and will not be repeated here.
[0110] The engine preheating device proposed in this application can activate the cylinder heating system and fuel heating system to preheat the engine when the current SOC of the hybrid vehicle's power battery meets certain requirements and the engine meets certain preheating conditions. This achieves heating of the engine's fuel, intake manifold, and cylinder interior before engine start-up via the cylinder heating system, fuel heating system, gas heating, and gas circulation device. This increases the in-cylinder temperature at initial ignition, improving air-fuel mixing during cold starts, enhancing combustion, and ultimately reducing emissions. Furthermore, this application can also improve engine NVH characteristics during cold starts and reduce fuel enrichment during startup, thereby improving vehicle fuel economy. This solves the problems in related technologies where engine start-up in cold conditions leads to poor fuel combustion, the methods are limited, and they fail to effectively meet user needs in different scenarios, resulting in low user engagement, wasted resources, and increased emissions.
[0111] Figure 6 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:
[0112] The memory 601, the processor 602, and the computer program stored on the memory 601 and capable of running on the processor 602.
[0113] When the processor 602 executes the program, it implements the engine preheating method provided in the above embodiments.
[0114] Furthermore, the vehicle also includes:
[0115] Communication interface 603 is used for communication between memory 601 and processor 602.
[0116] The memory 601 is used to store computer programs that can run on the processor 602.
[0117] The memory 601 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.
[0118] If the memory 601, processor 602, and communication interface 603 are implemented independently, then the communication interface 603, memory 601, and processor 602 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.
[0119] Optionally, in a specific implementation, if the memory 601, processor 602, and communication interface 603 are integrated on a single chip, then the memory 601, processor 602, and communication interface 603 can communicate with each other through an internal interface.
[0120] The processor 602 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.
[0121] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described engine preheating method.
[0122] This application also provides a computer program product, including a computer program that can run computer instructions. When the computer instructions are executed by a processor, they implement the engine preheating method provided in this application.
[0123] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0124] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0125] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.
[0126] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.
[0127] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or more of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.
[0128] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.
[0129] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.
[0130] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.
Claims
1. A method of preheating an engine, characterized by, Includes the following steps: Detect the current state of charge (SOC) of the power battery in a hybrid vehicle; When the current SOC reaches a preset threshold, the current driving mode of the hybrid vehicle is identified, and it is determined whether the engine meets the corresponding preheating conditions based on the current driving mode. If the engine meets the preheating conditions, a heating command is generated to activate the cylinder heating system and fuel heating system of the hybrid vehicle until the cylinder temperature of the engine reaches the target preheating temperature. Before heating the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command, the method further includes: determining whether the current driving mode is an energy-saving mode; if the driving mode is the energy-saving mode, then adjusting the fuel injection quantity for heating the cylinder heating system and fuel heating system. The preheating conditions include the current temperature of the cylinder heating system being less than a first temperature threshold and / or the current temperature of the fuel heating system being less than a second temperature threshold. Before determining whether the current driving mode is an energy-saving mode, the method further 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 command sent by the first user in response to the energy-saving prompt.
2. The method of claim 1, wherein, Before determining whether the current driving mode is energy-saving mode, the process also includes: Identify the actual driving needs of the second user; When the actual driving demand is energy saving, the hybrid vehicle is controlled to enter the energy saving mode.
3. A preheating device for an engine, characterized in that include: The detection module is used to detect the current state of charge (SOC) of the power battery in hybrid vehicles. The first judgment module is used to identify the current driving mode of the hybrid vehicle when the current SOC reaches a preset threshold, and to determine whether the engine meets the corresponding preheating conditions based on the current driving mode. A heating module is used to generate a heating command when the engine meets the preheating conditions, so as to activate the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command until the cylinder temperature of the engine reaches the target preheating temperature. The second judgment module is used to determine whether the current driving mode is an energy-saving mode before heating the cylinder heating system and fuel heating system of the hybrid vehicle using the heating command; the correction module is used to correct the fuel injection quantity for heating the cylinder heating system and fuel heating system when the driving mode is the energy-saving mode. The preheating conditions include the current temperature of the cylinder heating system being less than a first temperature threshold and / or the current temperature of the fuel heating system being less than a second temperature threshold. The second detection module is used to detect the initial cylinder temperature of the engine before determining whether the current driving mode is energy-saving mode; the generation module is used to generate an energy-saving prompt when the initial cylinder temperature of the engine meets the preset temperature; the first control module is used to control the hybrid vehicle to enter energy-saving mode based on the energy-saving command sent by the first user in response to the energy-saving prompt.
4. A vehicle characterized by comprising: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the engine preheating method as described in any one of claims 1-2.
5. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the engine preheating method as described in any one of claims 1-2.
6. A computer program product comprising a computer program, characterized in that, When the computer program is executed, it is used to implement the engine preheating method as described in any one of claims 1-2.