Engine control method, device and equipment and storage medium

Abstract

The invention relates to the technical field of engine control, and discloses an engine control method, device and equipment and a storage medium, and the method comprises the steps that the current environment temperature is obtained, and when the exhaust gas recirculation rate of an engine reaches a preset threshold value, an engine control strategy is determined according to the current environment temperature; and when the engine control strategy is a heating strategy, the air inlet temperature of the engine is increased according to the heating strategy, so that engine misfire control is achieved. By means of the method, the engine misfire condition caused by the high EGR rate at the low temperature can be effectively prevented.

Description

Technical Field

[0001] The present application relates to the field of engine control technology, and in particular to an engine control method, device, equipment and storage medium. Background Art

[0002] The limitations of EGR technology are gradually emerging, the application boundaries are limited, and the probability of engine misfire increases when running at a high EGR rate. EGR mainly works in the following aspects: CO2 and water vapor in EGR greatly increase the specific heat capacity of the working fluid, and the addition of exhaust gas also dilutes the oxygen concentration in the original mixture, thereby slowing down the combustion speed, reducing the maximum temperature and average temperature during the combustion process, destroying the favorable environment for NO generation, and thus greatly reducing NOX emissions. Because the load regulation method of gasoline engines is usually quantity regulation, the application of EGR on gasoline engines can increase the intake volume accordingly. The increase in EGR rate can reduce the throttling loss of gasoline engines under medium and low load conditions and reduce the fuel consumption rate of gasoline engines. Also, because the exhaust contains moisture produced by combustion, it will condense into water droplets under certain conditions and enter the combustion chamber to affect the ignition of the spark plug, thereby causing misfire failures.

[0003] Therefore, how to effectively prevent engine misfires caused by high EGR rates at low temperatures is a problem that needs to be solved urgently.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide an engine control method, device, equipment and storage medium, aiming to solve the technical problem of how to effectively prevent engine misfires caused by high EGR rates at low temperatures.

[0006] To achieve the above objectives, the present application proposes an engine control method, the method comprising:

[0007] Acquiring a current ambient temperature, and when an exhaust gas recirculation rate of the engine reaches a preset threshold, determining an engine control strategy according to the current ambient temperature;

[0008] When the engine control strategy is a heating strategy, the engine intake temperature is increased according to the heating strategy to achieve engine misfire control.

[0009] In one embodiment, the obtaining of the current ambient temperature and determining the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold value includes:

[0010] Acquiring a current ambient temperature, and when an exhaust gas recirculation rate of the engine reaches a preset threshold, determining a current environment according to the current ambient temperature;

[0011] An engine control strategy is determined according to the current environment.

[0012] In one embodiment, determining the current environment according to the current ambient temperature includes:

[0013] When the current ambient temperature is greater than a first preset ambient temperature threshold, determining that the current environment is a high temperature environment;

[0014] When the current ambient temperature is lower than a second preset ambient temperature threshold, determining that the current environment is a low temperature environment;

[0015] When the current ambient temperature is greater than or equal to the second preset ambient temperature threshold and less than or equal to the first preset ambient temperature threshold, it is determined that the current environment is a normal temperature environment, wherein the first preset ambient temperature threshold is greater than the second preset ambient temperature threshold.

[0016] In one embodiment, determining the engine control strategy according to the current environment includes:

[0017] When the current environment is a high temperature environment or a normal temperature environment, determining that the engine control strategy is a cooling strategy;

[0018] When the current environment is a low temperature environment, the engine control strategy is determined to be a heating strategy.

[0019] In one embodiment, the step of increasing the engine intake temperature according to the heating strategy includes:

[0020] Obtaining the gas temperature difference of the intercooling heat exchange system;

[0021] When the gas temperature difference reaches a preset temperature difference threshold, the mixer is heated by adjusting the duty cycle of the electronic water pump and the opening of the three-way control valve to increase the engine intake temperature.

[0022] In one embodiment, the obtaining of the current ambient temperature, when the exhaust gas recirculation rate of the engine reaches a preset threshold, after determining the engine control strategy according to the current ambient temperature, further comprises:

[0023] When the engine control strategy is a cooling strategy, the engine intake temperature is reduced according to the cooling strategy to achieve engine knock control.

[0024] In one embodiment, reducing the engine intake temperature according to the cooling strategy includes:

[0025] Get the actual opening degree of the engine waste heat side;

[0026] The actual opening is adjusted by a three-way control valve until the actual opening reaches a preset opening;

[0027] When the actual opening reaches the preset opening, cooling is performed through the intercooler heat exchange system to reduce the engine intake temperature.

[0028] In addition, to achieve the above-mentioned purpose, the present application also proposes an engine control device, the engine control device comprising:

[0029] A determination module, used to obtain the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determine the engine control strategy according to the current ambient temperature;

[0030] The temperature adjustment module is used to increase the engine intake temperature according to the heating strategy when the engine control strategy is a heating strategy, so as to achieve engine misfire control.

[0031] In addition, to achieve the above-mentioned purpose, the present application also proposes an engine control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the engine control method described above.

[0032] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the engine control method described above are implemented.

[0033] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the engine control method described above are implemented.

[0034] The present application provides an engine control method, which first obtains the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determines the engine control strategy according to the current ambient temperature; when the engine control strategy is a heating strategy, the engine intake temperature is increased according to the heating strategy to achieve engine misfire control, which can effectively prevent engine misfires caused by high EGR rates at low temperatures.

[0035] In summary, the present application realizes engine misfire control by timely adjusting the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold, and then timely adjusting the engine intake temperature according to the heating strategy in a low temperature environment, thereby overcoming the technical defect that engine misfires are prone to occur at high EGR rates at low temperatures, and can effectively prevent engine misfires caused by high EGR rates at low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] Figure 1 A schematic diagram of a flow chart provided for the first embodiment of the engine control method of the present application;

[0039] Figure 2 A schematic diagram of the structure of an engine control device provided in Embodiment 1 of the engine control method of the present application;

[0040] Figure 3 A flow chart of the second embodiment of the engine control method of the present application;

[0041] Figure 4 This is a schematic diagram of the module structure of the engine control device according to an embodiment of the present application;

[0042] Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in the engine control method of the embodiment of the present application.

[0043] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0045] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0046] The main solution of the embodiment of the present application is: obtaining the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determining the engine control strategy according to the current ambient temperature; when the engine control strategy is a heating strategy, increasing the engine intake temperature according to the heating strategy to achieve engine misfire control.

[0047] The limitations of EGR technology are gradually emerging, the application boundaries are limited, and the probability of engine misfire increases when running at a high EGR rate. EGR mainly works in the following aspects: CO2 and water vapor in EGR greatly increase the specific heat capacity of the working fluid, and the addition of exhaust gas also dilutes the oxygen concentration in the original mixture, thereby slowing down the combustion speed, reducing the maximum temperature and average temperature during the combustion process, destroying the favorable environment for NO generation, and thus greatly reducing NOX emissions. Because the load regulation method of gasoline engines is usually quantity regulation, the application of EGR on gasoline engines can increase the intake volume accordingly. The increase in EGR rate can reduce the throttling loss of gasoline engines under medium and low load conditions and reduce the fuel consumption rate of gasoline engines. Because the exhaust contains moisture produced by combustion, it will condense into water droplets under certain conditions and enter the combustion chamber to affect the ignition of the spark plug, thereby causing misfire failure. Therefore, how to effectively prevent engine misfires caused by high EGR rates at low temperatures is a problem that needs to be solved urgently.

[0048] The present application realizes engine misfire control by timely adjusting the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold, and then timely adjusting the engine intake temperature according to the heating strategy in a low temperature environment, thereby overcoming the technical defect that engine misfires are prone to occur at high EGR rates at low temperatures, and can effectively prevent engine misfires caused by high EGR rates at low temperatures.

[0049] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, an engine control device, etc. The following takes the engine control device as an example to illustrate this embodiment and the following embodiments.

[0050] Based on this, the embodiment of the present application provides an engine control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the engine control method of the present application.

[0051] In this embodiment, the engine control method includes steps S10 to S30:

[0052] Step S10, obtaining the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determining the engine control strategy according to the current ambient temperature.

[0053] It should be noted that the exhaust gas recirculation rate (EGR rate for short) refers to the ratio of the exhaust gas volume recirculated back to the combustion chamber to the total intake volume during engine operation.

[0054] It is understandable that when the exhaust gas recirculation rate of the engine reaches the preset threshold, it is considered to be in a high EGR rate condition. If the ambient temperature is low at this time, it is easy to cause the engine to misfire. Therefore, it is particularly important to monitor and respond to changes in ambient temperature in a timely manner. The preset threshold is based on the dynamic relationship between ambient temperature and engine operating status. The setting of the preset threshold needs to comprehensively consider multiple factors such as engine performance, emission standards and operating stability. In this embodiment, the preset threshold is obtained through a large amount of experimental data analysis and simulation optimization, aiming to balance the needs between low emissions and efficient operation of the engine.

[0055] In a specific implementation, the current ambient temperature can be obtained in a variety of ways, such as directly measuring with a temperature sensor, or obtaining data from an external ambient temperature sensor through the vehicle's onboard network system, which is not specifically limited in this embodiment. The obtained ambient temperature data will be used for subsequent control strategy adjustments.

[0056] It is worth noting that the current ambient temperature can be used to determine whether the engine is currently in a low-temperature environment, and then determine the corresponding engine control strategy, for example, heating the engine to ensure its normal operation in a low-temperature environment. Under low-temperature conditions, the engine's intake temperature is low, which will lead to a decrease in combustion efficiency and increase the risk of engine misfire. Therefore, according to the current ambient temperature, the engine control strategy can be adjusted to increase the intake temperature and thus improve combustion efficiency.

[0057] Step S20, when the engine control strategy is a heating strategy, increasing the engine intake temperature according to the heating strategy to achieve engine misfire control.

[0058] It should be noted that when the engine control strategy is the heating strategy, that is, the engine is currently in a low temperature environment and there is a risk of engine misfire. The engine intake temperature needs to be adjusted according to the heating strategy to avoid the misfire condition. Engine misfire means that the engine fails to ignite normally during the combustion process, resulting in some or all cylinders failing to effectively burn fuel. This situation will not only cause the engine power to drop, but also increase emission pollution, causing damage to the long-term operation of the engine. Therefore, it is necessary to control the occurrence of engine misfire.

[0059] It is understandable that the heating strategy can be implemented in a variety of ways, for example, using a coolant heater, an electric heater or a combustion chamber preheating device, etc. These devices can transfer heat to the intake system, thereby increasing the intake temperature. When adjusting the intake temperature, it is necessary to accurately control the power and time of the heating device to ensure that the intake temperature reaches the optimal value, thereby improving combustion efficiency and reducing the risk of misfire. This embodiment does not impose specific limitations on this.

[0060] In a feasible implementation, "raising the engine intake temperature according to the heating strategy" in step S20 may include: obtaining the gas temperature difference of the intercooler heat exchange system; when the gas temperature difference reaches a preset temperature difference threshold, heating the mixer by adjusting the duty cycle of the electronic water pump and the opening of the three-way control valve to increase the engine intake temperature.

[0061] It should be noted that the intercooler heat exchange system is a system used to cool the engine intake air. It transfers the heat in the intake air to the coolant through the heat exchanger, thereby reducing the intake air temperature. Under the heating strategy, the reverse operation is required, that is, the intake air temperature is increased by heating the coolant. For this purpose, the duty cycle of the electronic water pump and the opening of the three-way control valve need to be precisely adjusted to ensure that the coolant can effectively transfer heat to the intake system.

[0062] It is understandable that the duty cycle of the electronic water pump refers to the ratio of the on time to the off time of the electronic water pump. The larger the duty cycle, the longer the electronic water pump works and the greater the flow of the coolant. By adjusting the duty cycle, the flow of the coolant can be controlled, which in turn affects the heating effect. The opening of the three-way control valve determines the proportion of the coolant flowing to the intercooler heat exchange system. The larger the opening, the more coolant flows to the intercooler heat exchange system and the more obvious the heating effect.

[0063] like Figure 2 As shown, Figure 2 It is a structural schematic diagram of the engine control device, which includes: an engine 100, a high-temperature expansion kettle 110, a front-stage exhaust silencer 120, a first electronic water pump 130, a rear-stage exhaust silencer 140, and an EGR system 150; a high-temperature radiator 160, an EGR valve 170, a three-way control valve 180, an air filter 190, a mixing valve 200, a first intake air temperature sensor 210, an intercooler heat exchange system 220, a battery pack 230, a second electronic water pump 240, a drive motor 250, a low-temperature expansion kettle 260, a low-temperature radiator 270, a second intake air temperature sensor 280, and a throttle valve 290.

[0064] This embodiment adds a heat exchange system (introducing engine waste heat) on the basis of the intercooler radiator. In a high temperature environment, the waste heat system does not work. When the ambient temperature is lower than 25°C (i.e. in a low temperature environment), the waste heat system is put into operation to ensure that the intake air temperature is within a desired range, so that the EGR system can perform at its highest efficiency.

[0065] In a specific implementation, after the engine 100 starts working, the engine control device monitors the gas temperature difference of the intercooler heat exchange system 220. When it detects that the temperature of the second intake temperature sensor 280 at the intercooler outlet is lower than 26°C, it adjusts the duty ratio of the first electronic water pump 130 and the second electronic water pump 240, and adjusts the opening of the three-way control valve 180 at the same time, so as to force the waste heat of the engine to enter the intercooler heat exchange system 220 to heat the mixer so that the engine intake temperature is always above 26°C, thereby avoiding the occurrence of misfire conditions.

[0066] It is worth mentioning that according to bench test data, when the intake air temperature after the intercooler is above 26°C, condensed water will not condense on the inner wall of the intake manifold to form water droplets that enter the combustion system with the intake air. Therefore, controlling the outlet temperature of the intercooler can effectively solve the fire problem caused by condensed water.

[0067] In a feasible implementation manner, after step S10, the method may further include: when the engine control strategy is a cooling strategy, lowering the engine intake temperature according to the cooling strategy to achieve engine knock control.

[0068] It should be noted that when the engine control strategy is a cooling strategy, that is, it is currently in a normal temperature or high temperature environment, there is no risk of engine misfire, but there may be abnormal combustion phenomena such as knock caused by high intake temperature. The cooling strategy is needed to reduce the engine intake temperature to avoid the occurrence of knock. Engine knock refers to the abnormal combustion phenomenon caused by the spontaneous combustion of the mixture during the combustion process, which will cause severe vibration of the engine, damage engine components, and reduce engine performance. Therefore, in a high temperature environment, controlling the intake temperature is crucial to avoid engine knock.

[0069] It is understood that under the cooling strategy, the reduction of the engine intake temperature can be achieved in a variety of ways, for example, using devices such as intercoolers, water-cooled intercoolers or evaporative cooling systems, which can effectively transfer the heat in the intake air to the cooling medium, thereby reducing the intake air temperature. When adjusting the intake air temperature, it is also necessary to accurately control the power and time of the cooling device to ensure that the intake air temperature drops to the optimal value, thereby improving combustion efficiency and reducing the risk of knock.

[0070] In a feasible implementation, lowering the engine intake temperature according to the cooling strategy includes: obtaining an actual opening of the engine waste heat side; adjusting the actual opening through a three-way control valve until the actual opening reaches a preset opening; when the actual opening reaches the preset opening, cooling through an intercooler heat exchange system to lower the engine intake temperature.

[0071] It should be noted that the actual opening of the engine waste heat side refers to the actual opening value of the coolant flow control valve on the waste heat side during engine operation. By accurately controlling this opening value, the coolant flow can be adjusted, thereby affecting the cooling effect. Under the cooling strategy, it is necessary to ensure that the coolant flow is large enough to take away excess heat from the engine, thereby reducing the intake temperature.

[0072] It is understandable that the engine control device will monitor the engine's operating status and ambient temperature in real time. When it detects that the engine is in a high temperature environment, it will automatically start the cooling strategy. At this time, the engine control device will adjust the actual opening of the three-way control valve according to the preset cooling strategy to ensure that the coolant flow reaches the optimal value. Subsequently, the engine intake air is cooled through the intercooler heat exchange system to ensure that the intake air temperature drops to a safe range to avoid the occurrence of knocking.

[0073] After the engine 100 starts working, the three-way control valve 180 will adjust the opening of the engine waste heat side to zero. At this time, the engine operation is no different from the traditional system. The intercooler heat exchange system 220 plays a cooling role, reducing the intake temperature, allowing the engine to work normally and avoiding high intake temperature causing combustion abnormalities such as knock.

[0074] The present embodiment provides an engine control method, which first obtains the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determines the engine control strategy according to the current ambient temperature; when the engine control strategy is a heating strategy, the engine intake temperature is increased according to the heating strategy to achieve engine misfire control, which can effectively prevent engine misfires caused by high EGR rates at low temperatures.

[0075] In summary, this embodiment achieves engine misfire control by timely adjusting the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold, and then timely adjusting the engine intake temperature according to the heating strategy in a low temperature environment, thereby overcoming the technical defect that engine misfires are prone to occur at high EGR rates at low temperatures, and can effectively prevent engine misfires caused by high EGR rates at low temperatures.

[0076] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can refer to the above introduction, and will not be repeated later. Figure 3 , the step S10 further includes steps S101-S102:

[0077] Step S101, obtaining the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determining the current environment according to the current ambient temperature.

[0078] It should be noted that the current ambient temperature can be obtained by real-time monitoring of the engine control unit (ECU) through a temperature sensor. The current environment refers to the current temperature environment, which can include a high temperature environment, a low temperature environment, and a normal temperature environment.

[0079] In a feasible implementation, "determining the current environment according to the current ambient temperature" in step S101 may include: when the current ambient temperature is greater than a first preset ambient temperature threshold, determining that the current environment is a high temperature environment; when the current ambient temperature is less than a second preset ambient temperature threshold, determining that the current environment is a low temperature environment; when the current ambient temperature is greater than or equal to the second preset ambient temperature threshold and less than or equal to the first preset ambient temperature threshold, determining that the current environment is a normal temperature environment, wherein the first preset ambient temperature threshold is greater than the second preset ambient temperature threshold.

[0080] It should be noted that the first preset ambient temperature threshold and the second preset ambient temperature threshold can be set according to the specific model and working characteristics of the engine. For example, for some engine models, the first preset ambient temperature threshold can be set to 30°C, and the second preset ambient temperature threshold can be set to 25°C. In this way, when the current ambient temperature monitored by the temperature sensor is greater than 30°C, it can be considered that the engine is in a high temperature environment; when the current ambient temperature monitored by the temperature sensor is less than 25°C, it can be considered that the engine is in a low temperature environment; and when the current ambient temperature monitored by the temperature sensor is between 25°C and 30°C, it can be considered that the engine is in a normal temperature environment. This embodiment does not impose specific restrictions on this.

[0081] Step S102, determining an engine control strategy according to the current environment.

[0082] It should be noted that the engine control strategy includes heating strategy and cooling strategy. The heating strategy is mainly used in low temperature environment, that is, the ambient temperature is below 25℃, to ensure that the engine can quickly reach the optimal operating temperature during cold start, thereby avoiding engine misfire caused by low temperature. The cooling strategy is mainly used in normal temperature and high temperature environment, that is, the ambient temperature is above 25℃, to prevent the engine from overheating and ensure that the engine can run stably under high temperature conditions.

[0083] In a feasible implementation, step S102 may include: when the current environment is a high temperature environment or a normal temperature environment, determining that the engine control strategy is a cooling strategy; when the current environment is a low temperature environment, determining that the engine control strategy is a heating strategy.

[0084] It should be noted that when the current environment is determined to be a low temperature environment, the engine control unit (ECU) will start the heating strategy to increase the engine intake temperature to prevent engine misfires. The heating strategy can adjust the coolant circulation system so that the coolant absorbs more heat when circulating inside the engine, thereby increasing the engine temperature. In addition, the heating strategy can also directly heat the air entering the engine by adjusting the intake manifold heater to quickly increase the intake temperature.

[0085] It is understandable that when the current environment is determined to be a normal temperature or high temperature environment, the engine control unit (ECU) will start the cooling strategy to maintain the engine running within the optimal operating temperature range. The cooling strategy can prevent engine knock by adjusting the flow and temperature of the coolant circulation system.

[0086] In this embodiment, the current environment can be determined in time according to the current ambient temperature, and then the corresponding engine control strategy can be quickly and accurately determined according to the current environment, effectively preventing engine misfire and knock, thereby effectively improving engine performance.

[0087] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the engine control method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0088] This application also provides an engine control device, please refer to Figure 4 , the engine control device comprises:

[0089] The determination module 10 is used to obtain the current ambient temperature and determine the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold.

[0090] The temperature adjustment module 20 is used to increase the engine intake temperature according to the heating strategy when the engine control strategy is a heating strategy, so as to achieve engine misfire control.

[0091] The present embodiment provides an engine control device, which obtains the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determines the engine control strategy according to the current ambient temperature; when the engine control strategy is a heating strategy, the engine intake temperature is increased according to the heating strategy to achieve engine misfire control, which can effectively prevent engine misfires caused by high EGR rates at low temperatures.

[0092] In summary, this embodiment achieves engine misfire control by timely adjusting the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold, and then timely adjusting the engine intake temperature according to the heating strategy in a low temperature environment, thereby overcoming the technical defect that engine misfires are prone to occur at high EGR rates at low temperatures, and can effectively prevent engine misfires caused by high EGR rates at low temperatures.

[0093] Optionally, the determination module 10 is further used to obtain the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determine the current environment according to the current ambient temperature; and determine the engine control strategy according to the current environment.

[0094] Optionally, the determination module 10 is also used to determine that the current environment is a high temperature environment when the current ambient temperature is greater than a first preset ambient temperature threshold; to determine that the current environment is a low temperature environment when the current ambient temperature is less than a second preset ambient temperature threshold; and to determine that the current environment is a normal temperature environment when the current ambient temperature is greater than or equal to the second preset ambient temperature threshold and less than or equal to the first preset ambient temperature threshold, wherein the first preset ambient temperature threshold is greater than the second preset ambient temperature threshold.

[0095] Optionally, the determination module 10 is further used to determine that the engine control strategy is a cooling strategy when the current environment is a high temperature environment or a normal temperature environment; and to determine that the engine control strategy is a heating strategy when the current environment is a low temperature environment.

[0096] Optionally, the temperature adjustment module 20 is also used to obtain the gas temperature difference of the intercooler heat exchange system; when the gas temperature difference reaches a preset temperature difference threshold, the mixer is heated by adjusting the duty cycle of the electronic water pump and the opening of the three-way control valve to increase the engine intake temperature.

[0097] Optionally, the temperature adjustment module 20 is further configured to, when the engine control strategy is a cooling strategy, reduce the engine intake temperature according to the cooling strategy to achieve engine knock control.

[0098] Optionally, the temperature adjustment module 20 is also used to obtain the actual opening of the engine waste heat side; adjust the actual opening through a three-way control valve until the actual opening reaches a preset opening; when the actual opening reaches the preset opening, cool through the intercooler heat exchange system to reduce the engine intake temperature.

[0099] The engine control device provided by the present application adopts the engine control method in the above embodiment, which can solve the technical problem of how to effectively prevent engine misfires caused by high EGR rates at low temperatures. Compared with the prior art, the beneficial effects of the engine control device provided by the present application are the same as the beneficial effects of the engine control method provided by the above embodiment, and other technical features in the engine control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0100] The present application provides an engine control device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the engine control method in the above-mentioned embodiment one.

[0101] Reference below Figure 5 , which shows a schematic diagram of the structure of an engine control device suitable for implementing the embodiment of the present application. The engine control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The engine control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0102] like Figure 5As shown, the engine control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the engine control device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the engine control device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows an engine control device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0103] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0104] The engine control device provided by the present application adopts the engine control method in the above embodiment, which can solve the technical problem of how to effectively prevent engine misfires caused by high EGR rates at low temperatures. Compared with the prior art, the beneficial effects of the engine control device provided by the present application are the same as the beneficial effects of the engine control method provided by the above embodiment, and other technical features in the engine control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0105] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0106] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0107] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the engine control method in the above-mentioned embodiment.

[0108] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0109] The computer-readable storage medium may be included in the engine control device; or may exist independently without being assembled into the engine control device.

[0110] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the engine control device, the engine control device: obtains the current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determines the engine control strategy according to the current ambient temperature; when the engine control strategy is a heating strategy, increases the engine intake temperature according to the heating strategy to achieve engine misfire control.

[0111] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0112] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0113] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0114] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned engine control method, and can solve the technical problem of how to effectively prevent engine misfires caused by high EGR rates at low temperatures. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the engine control method provided by the above-mentioned embodiment, and will not be repeated here.

[0115] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the engine control method as described above are implemented.

[0116] The computer program product provided by the present application can solve the technical problem of how to effectively prevent engine misfires caused by high EGR rates at low temperatures. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the engine control method provided by the above embodiment, which will not be repeated here.

[0117] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An engine control method, characterized in that: The method comprises: Acquiring a current ambient temperature, and when an exhaust gas recirculation rate of the engine reaches a preset threshold, determining an engine control strategy according to the current ambient temperature; When the engine control strategy is a heating strategy, the engine intake temperature is increased according to the heating strategy to achieve engine misfire control.

2. The method according to claim 1, characterized in that The obtaining of the current ambient temperature and determining the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold value includes: Acquiring a current ambient temperature, and when an exhaust gas recirculation rate of the engine reaches a preset threshold, determining a current environment according to the current ambient temperature; An engine control strategy is determined according to the current environment.

3. The method according to claim 2, characterized in that The determining the current environment according to the current ambient temperature includes: When the current ambient temperature is greater than a first preset ambient temperature threshold, determining that the current environment is a high temperature environment; When the current ambient temperature is lower than a second preset ambient temperature threshold, determining that the current environment is a low temperature environment; When the current ambient temperature is greater than or equal to the second preset ambient temperature threshold and less than or equal to the first preset ambient temperature threshold, it is determined that the current environment is a normal temperature environment, wherein the first preset ambient temperature threshold is greater than the second preset ambient temperature threshold.

4. The method according to claim 2, characterized in that The determining of the engine control strategy according to the current environment includes: When the current environment is a high temperature environment or a normal temperature environment, determining that the engine control strategy is a cooling strategy; When the current environment is a low temperature environment, the engine control strategy is determined to be a heating strategy.

5. The method according to claim 1, characterized in that The step of increasing the engine intake air temperature according to the heating strategy comprises: Obtaining the gas temperature difference of the intercooling heat exchange system; When the gas temperature difference reaches a preset temperature difference threshold, the mixer is heated by adjusting the duty cycle of the electronic water pump and the opening of the three-way control valve to increase the engine intake temperature.

6. The method according to claim 1, characterized in that The method of obtaining the current ambient temperature and determining the engine control strategy according to the current ambient temperature when the exhaust gas recirculation rate of the engine reaches a preset threshold value further includes: When the engine control strategy is a cooling strategy, the engine intake temperature is reduced according to the cooling strategy to achieve engine knock control.

7. The method according to claim 6, characterized in that The step of reducing the engine intake temperature according to the cooling strategy comprises: Get the actual opening degree of the engine waste heat side; The actual opening is adjusted by a three-way control valve until the actual opening reaches a preset opening; When the actual opening reaches the preset opening, cooling is performed through the intercooler heat exchange system to reduce the engine intake temperature.

8. An engine control device, characterized in that: The engine control device comprises: A determination module, used to obtain a current ambient temperature, and when the exhaust gas recirculation rate of the engine reaches a preset threshold, determine an engine control strategy according to the current ambient temperature; The temperature adjustment module is used to increase the engine intake temperature according to the heating strategy when the engine control strategy is a heating strategy, so as to achieve engine misfire control.

9. An engine control device, characterized in that: The engine control device comprises: a memory, a processor, and an engine control program stored in the memory and executable on the processor, wherein the engine control program is configured to implement the engine control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores an engine control program, and when the engine control program is executed by the processor, the engine control method according to any one of claims 1 to 7 is implemented.

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