Exhaust gas recirculation system enablement control method, apparatus, electronic device, and medium

Abstract

The application provides an exhaust gas recirculation system enabling control method and device, electronic equipment, storage medium, an exhaust gas recirculation system and a vehicle. The method comprises the following steps: obtaining a first parameter group, the first parameter group comprising environmental humidity, exhaust gas recirculation system gas temperature, intake manifold temperature and engine water temperature; determining whether all parameters in the first parameter group meet corresponding preset conditions; determining whether the exhaust gas recirculation system is currently in a prohibition request state; if all parameters in the first parameter group meet corresponding preset conditions and the exhaust gas recirculation system is not currently in a prohibition request state, the exhaust gas recirculation system is enabled. The mixed gas of fresh air and EGR will not produce condensed water when being cooled in the intercooler, and the engine will not misfire due to the condensed water, so that the engine is protected to operate safely.

Description

Technical Field

[0001] This application relates to the field of EGR control technology, and in particular to an exhaust gas recirculation system enabling control method, device, electronic equipment, storage medium, exhaust gas recirculation system, and vehicle. Background Technology

[0002] Currently, engines employ external EGR (Exhaust Gas Recirculation) technology, with activation typically determined by engine coolant temperature and ambient temperature. Cooling the EGR can lead to condensation issues. When condensation occurs inside the overhead water-cooled intercooler, the resulting water can cause engine misfires, potentially damaging the engine and exhaust system. Summary of the Invention

[0003] The main objective of this application is to provide an exhaust gas recirculation (EGR) system enabling control method, device, electronic equipment, storage medium, exhaust gas recirculation system, and vehicle. The aim is to prevent the engine from activating EGR under inappropriate conditions, which could lead to condensation during cooling of the fresh air-EGR mixture at the intercooler after turbocharging, thereby causing damage to the engine and exhaust system.

[0004] To achieve the above objectives, a first aspect of this application provides an enable control method for an exhaust gas recirculation system, the method comprising:

[0005] Obtain a first set of parameters, which includes ambient humidity, exhaust gas recirculation system gas temperature, intake manifold temperature, and engine coolant temperature.

[0006] Determine whether all parameters in the first parameter group meet the corresponding preset conditions;

[0007] Determine whether the exhaust gas recirculation system is currently in a request-prohibited state;

[0008] If all parameters in the first parameter group meet the corresponding preset conditions, and the exhaust gas recirculation system is not currently in a prohibited request state, then the exhaust gas recirculation system is enabled.

[0009] In some embodiments, determining whether all parameters in the first parameter group satisfy the corresponding preset conditions includes:

[0010] When the ambient humidity and the intake manifold temperature meet the values ​​in the pre-defined temperature and humidity table, it is determined that the ambient humidity meets the preset condition and the intake manifold temperature meets the first preset condition.

[0011] When the intake manifold temperature is greater than the first temperature threshold, it is determined that the intake manifold temperature meets the second preset condition.

[0012] When the gas temperature of the exhaust gas recirculation system is greater than the second temperature threshold, it is determined that the gas temperature of the exhaust gas recirculation system meets the preset conditions.

[0013] When the engine coolant temperature is within a preset threshold range, it is determined that the engine coolant temperature meets the preset condition.

[0014] In some embodiments, before determining that the ambient humidity meets a preset condition and the intake manifold temperature meets a first preset condition when the ambient humidity and the intake manifold temperature conform to values ​​in a pre-defined temperature and humidity table, the method further includes:

[0015] The ambient humidity and intake manifold temperature are obtained;

[0016] Using a pre-defined temperature and humidity meter, it is determined whether the ambient humidity meets preset conditions and whether the intake manifold temperature meets a first preset condition.

[0017] In some embodiments, obtaining the ambient humidity and intake manifold temperature includes:

[0018] The ambient humidity is obtained using a humidity sensor or a rain sensor;

[0019] The intake manifold temperature is obtained through a first temperature sensor.

[0020] In some embodiments, the ambient humidity is acquired via a rain sensor, including:

[0021] The rainfall is measured by the rain sensor and a corresponding rainfall signal is generated.

[0022] The rainfall signal is converted into the corresponding ambient humidity level.

[0023] In some embodiments, before determining that the intake manifold temperature meets a second preset condition when the intake manifold temperature is greater than a first temperature threshold, the method further includes:

[0024] Acquire the temperature data from the first temperature sensor;

[0025] The temperature data from the first temperature sensor is compared with the first temperature threshold to determine whether the intake manifold temperature meets the second preset condition.

[0026] In some embodiments, before determining that the gas temperature of the exhaust gas recirculation system meets a preset condition when the gas temperature of the exhaust gas recirculation system is greater than a second temperature threshold, the method further includes:

[0027] Acquire temperature data from a second temperature sensor, which is used to detect the gas temperature in the exhaust gas recirculation system.

[0028] The temperature data from the second temperature sensor is compared with the second temperature threshold to determine whether the gas temperature of the exhaust gas recirculation system meets the preset conditions.

[0029] In some embodiments, before determining that the engine coolant temperature meets the preset condition when the engine coolant temperature is within a preset threshold range, the method further includes:

[0030] Acquire temperature data from a third temperature sensor, which is used to detect the engine coolant temperature;

[0031] The temperature data from the third temperature sensor is compared with the preset threshold range to determine whether the engine coolant temperature meets the preset conditions.

[0032] In some embodiments, determining whether the exhaust gas recirculation system is currently in a prohibited request state includes:

[0033] The exhaust gas recirculation system is determined to be in a prohibited request state when it is in any of the following states:

[0034] Differential pressure sensor malfunction status;

[0035] Alternatively, the intake pressure sensor may be malfunctioning.

[0036] Alternatively, the intake manifold temperature sensor monitors the request status.

[0037] Alternatively, the carbon canister control valve diagnostic request status;

[0038] Or, brake assist request status;

[0039] Alternatively, it could be a GPF regeneration request status.

[0040] In some embodiments, determining whether the exhaust gas recirculation system is currently in a prohibited request state includes:

[0041] When the exhaust gas recirculation system is not currently in a differential pressure sensor fault state, not in an intake pressure sensor fault state, not in an intake manifold temperature sensor monitoring request state, not in a carbon canister control valve diagnostic request state, not in a brake assist request state, and not in a GPF regeneration request state, it is determined that the exhaust gas recirculation system is not currently in a prohibited request state.

[0042] To achieve the above objectives, a second aspect of this application provides an exhaust gas recirculation system enabling control device, the device comprising:

[0043] The acquisition module is used to acquire a first parameter group, which includes ambient humidity, exhaust gas recirculation system gas temperature, intake manifold temperature and engine coolant temperature.

[0044] The first judgment module is used to determine whether all parameters in the first parameter group meet the corresponding preset conditions.

[0045] The second judgment module is used to determine whether the exhaust gas recirculation system is currently in a prohibited request state.

[0046] The control module is used to enable the exhaust gas recirculation system if all parameters in the first parameter group meet the corresponding preset conditions and the exhaust gas recirculation system is not currently in a prohibited request state.

[0047] To achieve the above objectives, a third aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method described in the first aspect.

[0048] To achieve the above objectives, a fourth aspect of the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect.

[0049] To achieve the above objectives, a fifth aspect of the present application provides an exhaust gas recirculation system that satisfies the enabling control method described in the first aspect above.

[0050] To achieve the above objectives, a sixth aspect of the present application provides a vehicle including the exhaust gas recirculation system described in the fifth aspect above.

[0051] This application discloses an exhaust gas recirculation (EGR) system enabling control method, device, electronic equipment, storage medium, EGR system, and vehicle. The method includes: acquiring a first parameter set, including ambient humidity, EGR system gas temperature, intake manifold temperature, and engine coolant temperature; determining whether all parameters in the first parameter set meet corresponding preset conditions; determining whether the EGR system is currently in a prohibited state; and if all parameters in the first parameter set meet the corresponding preset conditions and the EGR system is not currently in a prohibited state, then enabling the EGR system. This ensures that no condensate is generated when the fresh air and EGR mixture is cooled at the intercooler, preventing engine misfire due to condensate and thus protecting engine safe operation. Attached Figure Description

[0052] Figure 1 This is a flowchart of the exhaust gas recirculation system enabling control method provided in the embodiments of this application;

[0053] Figure 2 This is a flowchart of the steps for determining whether all parameters in the first parameter group meet the corresponding preset conditions, provided in an embodiment of this application.

[0054] Figure 3 This is a flowchart illustrating the steps for obtaining ambient humidity and intake manifold temperature provided in an embodiment of this application.

[0055] Figure 4 This is a flowchart illustrating the steps of obtaining ambient humidity using a rain sensor, as provided in an embodiment of this application.

[0056] Figure 5 This is a flowchart of the steps performed before determining that the intake manifold temperature meets the second preset condition when the intake manifold temperature is greater than the first temperature threshold, provided in the embodiments of this application.

[0057] Figure 6 This is a flowchart of the steps performed before determining that the gas temperature in the exhaust gas recirculation system meets the preset conditions when the gas temperature in the exhaust gas recirculation system is greater than the second temperature threshold, provided in an embodiment of this application.

[0058] Figure 7 This is a flowchart of the steps performed before determining that the engine coolant temperature meets the preset conditions when the engine coolant temperature is within a preset threshold range, provided in the embodiments of this application.

[0059] Figure 8 This is an example diagram of the exhaust gas recirculation system provided in this application embodiment currently in a prohibited request state;

[0060] Figure 9 This is a flowchart of the enable control of the exhaust gas recirculation system provided in the embodiments of this application;

[0061] Figure 10 This is a schematic diagram of the structure of the exhaust gas recirculation system enabling control device provided in the embodiments of this application;

[0062] Figure 11 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0064] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0066] EGR is an abbreviation for Exhaust Gas Recirculation. Exhaust gas recirculation refers to the process of returning a portion of the exhaust gases from the engine to the intake manifold, where they are mixed with fresh air and re-enter the cylinders. Because the exhaust gases contain a large amount of polyatomic gases such as CO2, which are non-combustible but absorb a significant amount of heat due to their high specific heat capacity, the maximum combustion temperature of the air-fuel mixture in the cylinder is lowered, thereby reducing NOx formation.

[0067] External EGR technology involves connecting an exhaust gas recirculation line to the exhaust system, drawing exhaust gas out and reintroducing it into the intake system, allowing it to mix thoroughly with fresh air before entering the cylinders. It typically includes an EGR valve, an EGR cooler, specialized piping, and an associated control unit. This allows for precise control of numerous exhaust gas parameters, maximizing the effectiveness of EGR. Depending on the piping connections, there are various technical approaches to external EGR.

[0068] Currently, engines use external EGR technology, and the activation of EGR is generally determined based on engine coolant temperature and ambient temperature. Cooling the EGR can cause condensation problems. When condensation occurs inside the overhead water-cooled intercooler, the condensed water can cause engine misfire, leading to damage to the engine and exhaust system.

[0069] Based on this, this application proposes an exhaust gas recirculation system enable control method. By determining that the vehicle state has reached a preset condition, the exhaust gas recirculation system is enabled, which can ensure that no condensate is generated when the fresh air and EGR mixture is cooled at the intercooler, and the engine will not misfire due to condensate, thereby protecting the safe operation of the engine.

[0070] Reference Figure 1 , Figure 1 This is a flowchart of the exhaust gas recirculation system enabling control method provided in the embodiments of this application. Figure 1The method may include, but is not limited to, steps S101 to S104.

[0071] Step S101: Obtain the first parameter group, which includes ambient humidity, exhaust gas recirculation system gas temperature, intake manifold temperature and engine coolant temperature.

[0072] Step S102: Determine whether all parameters in the first parameter group meet the corresponding preset conditions;

[0073] Step S103: Determine whether the exhaust gas recirculation system is currently in a prohibited request state;

[0074] Step S104: If all parameters in the first parameter group meet the corresponding preset conditions, and the exhaust gas recirculation system is not currently in a prohibited request state, then control the exhaust gas recirculation system to be enabled.

[0075] In this embodiment, considering that after the exhaust gas enters the exhaust gas recirculation system and mixes with fresh air, the high temperature of the exhaust gas necessitates cooling at the intercooler after turbocharging. However, if EGR is activated under inappropriate conditions, condensation can easily occur during the cooling process at the intercooler, potentially leading to engine misfires and damage to the engine and aftertreatment system. Therefore, controlling the exhaust gas recirculation system to ensure EGR operates under appropriate conditions is crucial.

[0076] This application provides a method for enabling and controlling an exhaust gas recirculation (EGR) system. The method involves acquiring a first set of parameters, including ambient humidity, EGR system gas temperature, intake manifold temperature, and engine coolant temperature. It then determines whether all parameters in the first set meet corresponding preset conditions and whether the EGR system is currently in a prohibited state. If all parameters in the first set meet the preset conditions and the EGR system is not currently in a prohibited state, the EGR system is enabled. This ensures that EGR is only activated when preset conditions are met, preventing damage to the engine and aftertreatment system caused by improper EGR activation. This avoids the formation of condensate during cooling of the fresh air-EGR mixture at the intercooler after turbocharging, which could lead to engine misfires or other malfunctions.

[0077] Reference Figure 2 , Figure 2 This is a flowchart of the steps for determining whether all parameters in the first parameter group meet the corresponding preset conditions, including but not limited to steps S201 to S204, provided in the embodiments of this application.

[0078] Step S201: When the ambient humidity and intake manifold temperature meet the values ​​in the pre-defined temperature and humidity table, determine that the ambient humidity meets the preset conditions and the intake manifold temperature meets the first preset conditions.

[0079] In this embodiment, after obtaining the first parameter group, it is necessary to further determine whether each parameter in the first parameter group meets the corresponding preset conditions. Specifically, the ambient humidity and intake manifold temperature are obtained, and then a pre-defined temperature and humidity table is used to determine whether the ambient humidity meets the preset conditions and whether the intake manifold temperature meets the first preset condition. For example, the pre-defined temperature and humidity table shows a temperature range of T1 to T2 and a humidity range of RH1 to RH2. That is, when the obtained intake manifold temperature is within the range of T1 to T2 and the ambient humidity is within the range of RH1 to RH2, it is determined that the ambient humidity meets the preset conditions and the intake manifold temperature meets the first preset condition.

[0080] It should be noted that this embodiment of the application directly determines whether the ambient humidity and the intake manifold temperature meet the preset conditions by looking up a table. That is, a temperature and humidity table is pre-established through experimentation. After obtaining the ambient humidity and intake manifold temperature, their values ​​can be directly used as input, and the judgment result can be output. For example, inputting the ambient humidity value will output a signal of 0 or 1, where 0 indicates that the ambient humidity does not meet the preset conditions, and 1 indicates that the ambient humidity meets the preset conditions. Similarly, inputting the intake manifold temperature value can also output a signal of 0 or 1, where 0 indicates that the intake manifold temperature does not meet the first preset condition, and 1 indicates that the intake manifold temperature meets the first preset condition.

[0081] It is understood that the embodiments of this application are merely illustrative of how to directly determine whether the ambient humidity meets the preset conditions and whether the intake manifold temperature meets the first preset condition by checking the temperature and humidity table. The embodiments of this application do not specifically limit the specific methods for determining the ambient humidity and intake manifold temperature.

[0082] Step S202: When the intake manifold temperature is greater than the first temperature threshold, it is determined that the intake manifold temperature meets the second preset condition.

[0083] In this embodiment, the intake manifold temperature can be further determined to meet a second preset condition using a first temperature threshold. Specifically, when the intake manifold temperature is greater than the first temperature threshold, the intake manifold temperature is determined to meet the second preset condition. For example, if the first temperature threshold is T1, when the measured intake manifold temperature is greater than T1, the intake manifold temperature is determined to meet the second preset condition; when the intake manifold temperature drops below the sum of the first temperature threshold T1 and the bias amount, the intake manifold temperature is determined not to meet the second preset condition.

[0084] It should be noted that in this embodiment, the intake manifold temperature requires dual determination. First, a pre-defined temperature and humidity meter is used to determine if the intake manifold temperature meets a first preset condition. Simultaneously, a first temperature threshold is used to determine if the intake manifold temperature meets a second preset condition. The first preset condition is used to ensure that excessive condensation is not generated at this intake manifold temperature, while the second preset condition is used to ensure that icing does not occur at this temperature. This dual determination facilitates qualitative analysis of the fault. Only when both the first and second preset conditions are met can it be determined that the intake manifold temperature meets the preset conditions.

[0085] Step S203: When the gas temperature of the exhaust gas recirculation system is greater than the second temperature threshold, it is determined that the gas temperature of the exhaust gas recirculation system meets the preset conditions.

[0086] In this embodiment, a second temperature threshold is used to determine whether the EGR gas temperature meets a preset condition. Specifically, when the gas temperature in the EGR exhaust gas recirculation system is greater than the second temperature threshold, the EGR gas temperature is determined to meet the preset condition. For example, if the second temperature threshold is T2, and the measured EGR gas temperature is greater than T2, the EGR gas temperature is determined to meet the preset condition.

[0087] Step S204: When the engine coolant temperature is within a preset threshold range, determine that the engine coolant temperature meets the preset conditions.

[0088] In this embodiment, the engine coolant temperature is determined to meet preset conditions by using a preset threshold range. Specifically, when the engine coolant temperature is within the preset threshold range, it is determined that the engine coolant temperature meets the preset conditions. For example, if the preset threshold range for coolant temperature is T3 to T4, then when the measured engine coolant temperature is within the range of T3 to T4, it is determined that the engine coolant temperature meets the preset conditions.

[0089] In this embodiment of the application, by judging each parameter in the first parameter group, it is possible to control the exhaust gas recirculation system to be enabled only when all parameters meet the preset conditions, which can effectively ensure the enable control conditions.

[0090] Reference Figure 3 , Figure 3 This is a flowchart of the steps for obtaining ambient humidity and intake manifold temperature provided in the embodiments of this application, including but not limited to steps S301 to S302.

[0091] Step S301: Obtain the ambient humidity using a humidity sensor or a rain sensor;

[0092] Step S302: Obtain the intake manifold temperature through the first temperature sensor.

[0093] In this embodiment, the intake manifold temperature can be directly measured using a first temperature sensor, and the ambient humidity can be obtained using a humidity sensor or a rain sensor. This allows for a determination of whether the obtained intake manifold temperature and ambient humidity meet preset conditions.

[0094] In this embodiment, a pre-defined temperature and humidity table can be used to effectively determine whether the ambient humidity meets preset conditions and whether the intake manifold temperature meets a first preset condition. Specifically, an ambient humidity sensor or a rain sensor can be used to effectively acquire ambient humidity, and a first temperature sensor can be used to effectively acquire intake manifold temperature. Then, by looking up the acquired ambient humidity and intake manifold temperature in the pre-defined temperature and humidity table, it can be effectively determined whether the ambient humidity and intake manifold temperature meet the preset conditions.

[0095] In this embodiment of the application, the pre-defined temperature and humidity table is only an example of the correspondence between ambient humidity and intake manifold temperature. This embodiment of the application does not specifically limit the form in which the correspondence between ambient humidity and intake manifold temperature is expressed. It can be reflected by a temperature and humidity table, or by other forms such as a corresponding graph, a corresponding formula, or a corresponding array.

[0096] Reference Figure 4 , Figure 4 This is a flowchart of the steps for obtaining ambient humidity using a rain sensor, as provided in the embodiments of this application, including but not limited to steps S401 to S402.

[0097] Step S401: Measure the rainfall using the rain sensor and generate a corresponding rainfall signal;

[0098] Step S402: Convert the rainfall signal into a corresponding ambient humidity level.

[0099] In this embodiment, if a humidity sensor is installed in the exhaust gas recirculation system, the ambient humidity can be directly obtained through the humidity sensor. If no humidity sensor is installed in the exhaust gas recirculation system, the ambient humidity can be obtained through a rain sensor. If both a humidity sensor and a rain sensor are installed in the exhaust gas recirculation system, either sensor can be selected to measure the ambient humidity.

[0100] In this embodiment, when a humidity sensor is installed, the specific value of the ambient humidity can be directly obtained through the humidity sensor, resulting in faster acquisition and more accurate humidity readings. When a humidity sensor is not installed, the ambient humidity can be obtained through a rain sensor, meaning there is no need to specifically install a humidity sensor to measure the ambient humidity, thus saving equipment costs.

[0101] Specifically, when obtaining ambient humidity using a rain gauge, the rain gauge first measures the rainfall, then generates a corresponding rainfall signal, which is then converted into a corresponding ambient humidity level. For example, when the measured rainfall is A, signal 1 is generated, indicating that the current humidity is within the RH1 to RH2 range in the hygrometer. When the measured rainfall is B, signal 2 is generated, indicating that the current humidity is within the RH2 to RH3 range in the hygrometer. When the measured rainfall is C, signal 3 is generated, indicating that the current humidity is within the RH3 to RH4 range in the hygrometer.

[0102] Understandably, although a rain sensor cannot obtain a specific value for ambient humidity, it can determine the range of humidity levels. Knowing this range allows us to use a hygrometer to determine if the ambient humidity meets preset conditions. Therefore, the values ​​measured by the rain sensor can still be used to determine whether the ambient humidity meets preset conditions.

[0103] Reference Figure 5 , Figure 5 This is a flowchart of the steps performed before determining that the intake manifold temperature meets the second preset condition when the intake manifold temperature is greater than the first temperature threshold, provided in the embodiments of this application, including but not limited to steps S501 to S502.

[0104] Step S501: Obtain temperature data from the first temperature sensor;

[0105] Step S502: Compare the temperature data from the first temperature sensor with the first temperature threshold to determine whether the intake manifold temperature meets the second preset condition.

[0106] In this embodiment of the application, the intake manifold temperature can be obtained by reading the temperature data on the first temperature sensor, and then the obtained intake manifold temperature is compared with the first temperature threshold to determine whether the intake manifold temperature is greater than the first temperature threshold, thereby effectively determining whether the intake manifold temperature meets the second preset condition.

[0107] Reference Figure 6 , Figure 6 This is a flowchart of the steps performed before determining that the gas temperature of the exhaust gas recirculation system meets the preset conditions when the gas temperature of the exhaust gas recirculation system is greater than the second temperature threshold, provided in the embodiments of this application, including but not limited to steps S601 to S602.

[0108] Step S601: Obtain temperature data from the second temperature sensor, which is used to detect the gas temperature in the exhaust gas recirculation system.

[0109] Step S602: Compare the temperature data from the second temperature sensor with the second temperature threshold to determine whether the gas temperature of the exhaust gas recirculation system meets the preset conditions.

[0110] In this embodiment of the application, the gas temperature of the exhaust gas recirculation system is obtained by reading the temperature data on the second temperature sensor, and then the obtained gas temperature of the exhaust gas recirculation system is compared with the second temperature threshold. This allows it to determine whether the gas temperature of the exhaust gas recirculation system is greater than the second temperature threshold, and thus effectively determine whether the gas temperature of the exhaust gas recirculation system meets the preset conditions.

[0111] Reference Figure 7 , Figure 7 This is a flowchart of the steps performed before determining that the engine coolant temperature meets the preset conditions when the engine coolant temperature is within a preset threshold range, provided by the embodiments of this application, including but not limited to steps S701 to S702.

[0112] Step S701: Obtain temperature data from the third temperature sensor, which is used to detect engine coolant temperature;

[0113] Step S702: Compare the temperature data from the third temperature sensor with a preset threshold range to determine whether the engine coolant temperature meets the preset conditions.

[0114] In this embodiment of the application, the engine coolant temperature can be obtained by reading the temperature data on the third temperature sensor, and then the obtained engine coolant temperature can be compared with a preset threshold range to determine whether the engine coolant temperature belongs to the preset threshold range, thereby effectively determining whether the engine coolant temperature meets the preset conditions.

[0115] Reference Figure 8 , Figure 8 This is an example diagram illustrating the current state of the exhaust gas recirculation system in a prohibited request state, as provided in this embodiment. In this embodiment, it is necessary to determine whether the exhaust gas recirculation system is currently in a prohibited request state. Specifically, the exhaust gas recirculation system is determined to be in a prohibited request state when it is currently in any of the following states:

[0116] S801, differential pressure sensor fault status;

[0117] S802, intake pressure sensor malfunction status;

[0118] S803, Intake manifold temperature sensor monitoring request status;

[0119] S804, Carbon canister control valve diagnostic request status;

[0120] S805, Brake assist request status;

[0121] S806, GPF regeneration request status.

[0122] For example, when the exhaust gas recirculation (EGR) system is currently in a differential pressure sensor malfunction state, it is determined that the EGR system is currently in a prohibited request state, i.e., the EGR system is not allowed to be activated. Alternatively, when the EGR system is currently in an intake pressure sensor malfunction state, it is determined that the EGR system is currently in a prohibited request state. Alternatively, when the EGR system is currently in an intake manifold temperature sensor monitoring request state, it is determined that the EGR system is currently in a prohibited request state. Alternatively, when the EGR system is currently in a carbon canister control valve diagnostic request state, it is determined that the EGR system is currently in a prohibited request state. Alternatively, when the EGR system is currently in a brake assist request state, it is determined that the EGR system is currently in a prohibited request state. Alternatively, when the EGR system is currently in a GPF regeneration request state, it is determined that the EGR system is currently in a prohibited request state.

[0123] It should be noted that when the exhaust gas recirculation system is currently in any one or more of the six states from S801 to S806, such as simultaneously being in a differential pressure sensor fault state and a brake assist request state, it can be determined that the exhaust gas recirculation system is currently in a prohibited request state.

[0124] In this embodiment, by determining whether the exhaust gas recirculation system is currently in a prohibited request state, the enabling control conditions of the exhaust gas recirculation system can be further restricted.

[0125] Conversely, in this embodiment, when the exhaust gas recirculation system is not currently in a differential pressure sensor fault state, nor in an intake pressure sensor fault state, nor in an intake manifold temperature sensor monitoring request state, nor in a carbon canister control valve diagnostic request state, nor in a brake assist request state, nor in a GPF regeneration request state, it is determined that the exhaust gas recirculation system is not currently in a prohibited request state.

[0126] In this embodiment of the application, by determining that the exhaust gas recirculation system is not currently in a prohibited request state, the exhaust gas recirculation system can be controlled to enter an enabled state.

[0127] Understandably, all six states, from S801 to S806, can be displayed in the corresponding areas of the car, such as displaying the corresponding fault codes, which can determine the car's current state.

[0128] Reference Figure 9 , Figure 9 This is a flowchart illustrating the enable control of the exhaust gas recirculation system provided in an embodiment of this application. Figure 9As shown, a first set of parameters can be obtained first, including ambient humidity, exhaust gas recirculation (EGR) system gas temperature, intake manifold temperature, and engine coolant temperature. Then, it is sequentially determined whether each parameter in the first set meets preset conditions. Specifically, if the ambient humidity and intake manifold temperature meet the values ​​in a pre-defined temperature and humidity table, it is determined that the ambient humidity meets the preset condition and the intake manifold temperature meets the first preset condition. If the intake manifold temperature is greater than the first temperature threshold D, it is determined that the intake manifold temperature meets the second preset condition. If the EGR gas temperature is greater than the second temperature threshold C, it is determined that the EGR gas temperature meets the preset condition. If the engine coolant temperature is greater than or equal to A and less than or equal to B, it is determined that the engine coolant temperature meets the preset condition. Simultaneously, it is determined whether the exhaust gas recirculation system is currently in a prohibited request state. If the exhaust gas recirculation system is not currently in a differential pressure sensor fault state, nor in an intake pressure sensor fault state, nor in an intake manifold temperature sensor monitoring request state, nor in a carbon canister control valve diagnostic request state, nor in a brake assist request state, nor in a GPF regeneration request state, then it is determined that the exhaust gas recirculation system is not currently in a prohibited request state. Once these preset conditions are met, the exhaust gas recirculation system is enabled, that is, the exhaust gas recirculation system is turned on to keep it in a working state.

[0129] Please see Figure 10 This application also provides an exhaust gas recirculation system enabling control device 100, which can implement the above-mentioned exhaust gas recirculation system enabling control method. The device includes:

[0130] The acquisition module 1001 is used to acquire a first parameter group, which includes ambient humidity, exhaust gas recirculation system gas temperature, intake manifold temperature and engine coolant temperature.

[0131] The first judgment module 1002 is used to judge whether all parameters in the first parameter group meet the corresponding preset conditions;

[0132] The second judgment module 1003 is used to determine whether the exhaust gas recirculation system is currently in a prohibited request state.

[0133] The control module 1004 is used to enable the exhaust gas recirculation system if all parameters in the first parameter group meet the corresponding preset conditions and the exhaust gas recirculation system is not currently in a prohibited request state.

[0134] The specific implementation of the exhaust gas recirculation system enabling control device is basically the same as the specific implementation of the exhaust gas recirculation system enabling control method described above, and will not be repeated here.

[0135] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described exhaust gas recirculation system enabling control method. This electronic device can be any smart terminal, including tablet computers, in-vehicle computers, etc.

[0136] Please see Figure 11 , Figure 11 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. The electronic device includes:

[0137] The processor 1101 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.

[0138] The memory 1102 can be implemented as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1102 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1102 and is called and executed by the processor 1101 to execute the exhaust gas recirculation system enable control method of the embodiments of this application.

[0139] Input / output interface 1103 is used to implement information input and output;

[0140] The communication interface 1104 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0141] Bus 1105 transmits information between various components of the device (e.g., processor 1101, memory 1102, input / output interface 1103, and communication interface 1104);

[0142] The processor 1101, memory 1102, input / output interface 1103 and communication interface 1104 are connected to each other within the device via bus 1105.

[0143] This application embodiment also provides a storage medium, which is a computer-readable storage medium, storing a computer program that, when executed by a processor, implements the above-described exhaust gas recirculation system enable control method.

[0144] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0145] This application also provides an exhaust gas recirculation system that satisfies the above-described exhaust gas recirculation system enabling control method.

[0146] This application also provides a vehicle including the exhaust gas recirculation system.

[0147] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0148] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0149] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0150] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0151] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0152] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0153] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0154] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0155] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0156] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0157] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A method for enabling and controlling an exhaust gas recirculation system, characterized in that, The method includes: Obtain a first set of parameters, which includes ambient humidity, exhaust gas recirculation system gas temperature, intake manifold temperature, and engine coolant temperature. Determine whether all parameters in the first parameter group meet the corresponding preset conditions, wherein determining whether all parameters in the first parameter group meet the corresponding preset conditions includes: When the ambient humidity and the intake manifold temperature meet the values ​​in the pre-defined temperature and humidity table, it is determined that the ambient humidity meets the preset condition and the intake manifold temperature meets the first preset condition. The first preset condition is used to ensure that no excessive condensate is generated at the intake manifold temperature. When the intake manifold temperature is greater than the first temperature threshold, it is determined that the intake manifold temperature meets the second preset condition, which is used to prevent icing. When the gas temperature of the exhaust gas recirculation system is greater than the second temperature threshold, it is determined that the gas temperature of the exhaust gas recirculation system meets the preset conditions. When the engine coolant temperature is within a preset threshold range, it is determined that the engine coolant temperature meets the preset condition; Determine whether the exhaust gas recirculation system is currently in a prohibited request state. Specifically, if the exhaust gas recirculation system is in any one of the following states: differential pressure sensor failure state, intake pressure sensor failure state, intake manifold temperature sensor monitoring request state, carbon canister control valve diagnostic request state, brake assist request state, or GPF regeneration request state, then the exhaust gas recirculation system is determined to be currently in a prohibited request state. If all parameters in the first parameter group meet the corresponding preset conditions, and the exhaust gas recirculation system is not currently in a prohibited request state, then the exhaust gas recirculation system is enabled.

2. The method according to claim 1, characterized in that, Before determining that the ambient humidity meets a preset condition and the intake manifold temperature meets a first preset condition when the ambient humidity and the intake manifold temperature meet the values ​​in a pre-defined temperature and humidity table, the method further includes: The ambient humidity and the intake manifold temperature are obtained; Using a pre-defined temperature and humidity meter, it is determined whether the ambient humidity meets preset conditions and whether the intake manifold temperature meets a first preset condition.

3. The method according to claim 2, characterized in that, The acquisition of the ambient humidity and the intake manifold temperature includes: The ambient humidity is obtained using a humidity sensor or a rain sensor; The intake manifold temperature is obtained through a first temperature sensor.

4. The method according to claim 3, characterized in that, The ambient humidity is obtained by a rain sensor, including: The rainfall is measured by the rain sensor and a corresponding rainfall signal is generated. The rainfall signal is converted into the corresponding ambient humidity level.

5. The method according to claim 3, characterized in that, Before determining that the intake manifold temperature meets the second preset condition when the intake manifold temperature is greater than the first temperature threshold, the method further includes: Acquire the temperature data from the first temperature sensor; The temperature data from the first temperature sensor is compared with the first temperature threshold to determine whether the intake manifold temperature meets the second preset condition.

6. The method according to claim 1, characterized in that, Before determining that the gas temperature in the exhaust gas recirculation system meets the preset condition when the gas temperature in the exhaust gas recirculation system is greater than the second temperature threshold, the method further includes: Acquire temperature data from a second temperature sensor, which is used to detect the gas temperature in the exhaust gas recirculation system. The temperature data from the second temperature sensor is compared with the second temperature threshold to determine whether the gas temperature of the exhaust gas recirculation system meets the preset conditions.

7. The method according to claim 1, characterized in that, Before determining that the engine coolant temperature meets the preset condition when the engine coolant temperature is within a preset threshold range, the method further includes: Acquire temperature data from a third temperature sensor, which is used to detect the engine coolant temperature; The temperature data from the third temperature sensor is compared with the preset threshold range to determine whether the engine coolant temperature meets the preset conditions.

8. The method according to claim 1, characterized in that, The step of determining whether the exhaust gas recirculation system is currently in a prohibited request state includes: When the exhaust gas recirculation system is not currently in a differential pressure sensor fault state, not in an intake pressure sensor fault state, not in an intake manifold temperature sensor monitoring request state, not in a carbon canister control valve diagnostic request state, not in a brake assist request state, and not in a GPF regeneration request state, it is determined that the exhaust gas recirculation system is not currently in a prohibited request state.

9. An enabling control device for an exhaust gas recirculation system, characterized in that, The device includes: The acquisition module is used to acquire a first parameter group, which includes ambient humidity, exhaust gas recirculation system gas temperature, intake manifold temperature and engine coolant temperature. The first judgment module is used to determine whether all parameters in the first parameter group meet the corresponding preset conditions. Specifically, the first judgment module is used to: determine that the ambient humidity meets the preset conditions and the intake manifold temperature meets the first preset conditions when the ambient humidity and the intake manifold temperature meet the values ​​in a pre-defined temperature and humidity table. The first preset conditions are used to ensure that excessive condensate will not be generated at the intake manifold temperature; determine that the intake manifold temperature meets the second preset conditions when the intake manifold temperature is greater than the first temperature threshold. The second preset conditions are used to prevent icing; determine that the exhaust gas recirculation system gas temperature meets the preset conditions when the exhaust gas recirculation system gas temperature is greater than the second temperature threshold; and determine that the engine coolant temperature meets the preset conditions when the engine coolant temperature is within a preset threshold range. The second judgment module is used to determine whether the exhaust gas recirculation system is currently in a prohibited request state. When the exhaust gas recirculation system is in any one of the following states: differential pressure sensor failure state, intake pressure sensor failure state, intake manifold temperature sensor monitoring request state, carbon canister control valve diagnosis request state, brake assist request state, or GPF regeneration request state, it is determined that the exhaust gas recirculation system is currently in a prohibited request state. The control module is used to enable the exhaust gas recirculation system if all parameters in the first parameter group meet the corresponding preset conditions and the exhaust gas recirculation system is not currently in a prohibited request state.

10. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method according to any one of claims 1 to 8.

11. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 8.

12. A waste gas recirculation system, characterized in that, The exhaust gas recirculation system satisfies the enabling control method according to any one of claims 1 to 8.

13. A vehicle, characterized in that, Includes the exhaust gas recirculation system as described in claim 12.

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