Water separating and fire catching pre-control method and device for vehicle exhaust gas recirculation system

Abstract

The invention relates to the technical field of hybrid power vehicles, in particular to a water bleeding and fire catching pre-control method and device for a vehicle exhaust gas recirculation system, and the method comprises the steps that in the operation process of a hybrid power engine of a vehicle, the water bleeding amount caused by EGR condensation under the normal pressure state is obtained; the temperature difference and the pressure difference before and after the intercooler are detected, and the saturated water content of the pressurized mixed gas is calculated in combination with the actual saturated vapor pressure, so that the water precipitation amount in the intake manifold is obtained; based on the temperature difference and the pressure difference, the water precipitation grade of the water precipitation amount in the intake manifold is determined, and according to the water precipitation amount, the water precipitation grade and the water precipitation amount in the intake manifold, an active intervention action of a hybrid vehicle control unit of the vehicle for water precipitation fire pre-control is generated. Therefore, the problems that in the related technology, due to the fact that formation of condensate water is reduced or the EGR rate is reduced to improve the combustion stability of an engine by controlling an EGR valve, the engine is prone to misfire, and the use requirement of a user in an actual scene is difficult to meet are solved.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicles, and in particular to a method and device for pre-controlling water separation fire in a vehicle exhaust gas recirculation system. Background Art

[0002] With the development of the automobile industry, hybrid models have been accepted by the market for their long cruising range and low energy consumption. Among them, the external exhaust gas recirculation system (EGR) has become a technology that OEMs (Original Equipment Manufacturers) are competing to use due to its good emission reduction effect. However, with the extensive application of external EGR technology, the number of cases where EGR produces a large amount of condensed water, resulting in poor combustion stability and even misfires has increased.

[0003] In the related technologies, in order to prevent vehicle EGR misfire, the main methods are to control the opening and closing timing of the EGR valve and the amount of exhaust gas recirculation, optimize the design of the EGR system to ensure that the exhaust gas is evenly distributed among the cylinders, and adopt cooling EGR technology. At the same time, the EGR valve is controlled according to the current intake temperature of the engine and the characteristic dew point temperature of the mixed intake to reduce the formation of condensed water, thereby reducing the occurrence of engine misfire. Some studies have also proposed that the low-pressure EGR system of the vehicle can be used to control the anti-condensation water, and the accumulation degree of condensed water can be determined by obtaining vehicle environmental information, and the EGR cooler, EGR valve, etc. can be reasonably set to limit the low-pressure EGR rate to prevent condensed water from entering the cylinder and causing engine misfire.

[0004] However, most of the related technologies reduce the formation of condensed water by controlling the EGR valve or reduce the EGR rate to improve engine combustion stability. They cannot avoid EGR water separation and condensation. Once the condensed water accumulates to a certain extent, it will easily cause engine misfire. It is difficult to meet the user's actual usage needs. The user experience and stickiness are not high, which needs to be solved urgently. Summary of the invention

[0005] The present application provides a method and device for pre-controlling water separation and fire in a vehicle exhaust gas recirculation system, so as to solve the problems that most of the related technologies reduce the formation of condensed water by controlling the EGR valve or reduce the EGR rate to improve the engine combustion stability, but cannot avoid EGR water separation and condensation. Once the condensed water accumulates to a certain extent, it is easy to cause engine fire, which is difficult to meet the user's actual usage needs, and the user's usage experience and viscosity are not high.

[0006] The first aspect of the present application provides a method for pre-controlling water separation and fire in a vehicle exhaust gas recirculation system, comprising the following steps: during the operation of a vehicle's hybrid engine, obtaining the amount of water separation caused by condensation of the EGR of an external exhaust gas recirculation system under normal pressure before the compressor; detecting the temperature difference and pressure difference before and after the intercooler, and calculating the saturated water content of the supercharged mixture based on the temperature difference, the pressure difference and the actual saturated vapor pressure to obtain the amount of water separation in the intake manifold; determining the water separation level of the water separation in the intake manifold based on the temperature difference and the pressure difference, and generating an active intervention action of the hybrid vehicle controller of the vehicle for pre-controlling water separation and fire according to the water separation amount and the water separation level.

[0007] Through the above-mentioned technical means, the embodiment of the present application can calculate the amount of water precipitation caused by EGR condensation under normal pressure before the compressor generated during the operation of the vehicle hybrid engine and the amount of water precipitation in the intake manifold generated by the intercooler, and make different pre-control decisions for different situations. It can effectively respond to the user's requirements for engine misfire pre-control in different scenarios, calculate and intervene in advance through the hybrid vehicle controller, and effectively improve the efficiency and accuracy of the processing through targeted processing, thereby avoiding the occurrence of engine misfires and improving the user's driving experience and usage stickiness.

[0008] Optionally, in one embodiment of the present application, the water precipitation level of the water precipitation amount in the intake manifold determined based on the temperature difference and the pressure difference includes: when the temperature difference is less than or equal to a first preset temperature difference and the pressure difference is less than or equal to the first preset pressure difference, determining that the water precipitation level is the first level; when the temperature difference is greater than the first preset temperature difference and less than or equal to the second preset temperature difference and / or the pressure difference is greater than the first preset pressure difference and less than or equal to the second preset pressure difference, determining that the water precipitation level is the second level; when the temperature difference is greater than the second preset temperature difference and the pressure difference is greater than the second preset pressure difference, determining that the water precipitation level is the third level.

[0009] Through the above-mentioned technical means, the embodiment of the present application can divide the amount of water precipitation in the intake manifold caused by the temperature difference and pressure difference before and after different intercoolers into different levels, so as to clearly understand the current amount of water precipitation in the intake manifold, facilitate the generation of different active intervention actions according to the corresponding levels, and effectively improve the efficiency of the hybrid engine EGR water precipitation misfire pre-control.

[0010] Optionally, in one embodiment of the present application, the active intervention action of the hybrid vehicle controller of the vehicle for water separation misfire pre-control generated according to the water separation amount and the water separation level includes: when the water separation level is the first level, the active intervention action is no intervention; when the water separation level is the second level, the active intervention action is to reduce the EGR valve opening of the vehicle to the target opening and increase the instantaneous torque of the motor of the vehicle to the first target torque; when the water separation level is the third level, the active intervention action is to close the fuel supply of the hybrid engine and the EGR valve of the vehicle, and increase the instantaneous torque of the motor of the vehicle to the second target torque, wherein the second target torque is greater than the first target torque.

[0011] Through the above-mentioned technical means, the embodiments of the present application can make different active intervention actions for different water precipitation levels, and make corresponding effective active intervention actions for the vehicle under the conditions of pre-control that the engine will not misfire, may misfire, or is seriously likely to misfire, and avoid the engine misfire before it occurs, which can effectively improve the user's driving experience, and after the water precipitation level returns to normal, secondary strategy planning can be re-performed, and the flexibility and intelligence level have been greatly improved.

[0012] Optionally, in one embodiment of the present application, it also includes: detecting the water precipitation rate in the intake manifold; establishing a correspondence between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold, and the intake temperature, pressure, and the current operating condition of the hybrid engine; based on the correspondence, combining the torque distribution information of the motor control unit of the vehicle and at least one of the battery power information, determining the active intervention action.

[0013] Through the above-mentioned technical means, the embodiment of the present application can comprehensively consider the influence of the amount of water precipitated in the intake manifold, the water precipitated rate, the intake temperature, pressure and the engine operating conditions in the process of generating active intervention actions, thereby increasing the effectiveness and accuracy of the active intervention actions generated by the present application, and taking the operation of the motor into consideration to ensure the normal operation of the vehicle and the user's driving experience.

[0014] Optionally, in one embodiment of the present application, before establishing the correspondence between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold and the intake temperature, pressure, and the current operating condition of the hybrid engine, it also includes: obtaining the speed, load, intake flow, EGR rate of the hybrid engine and the current ambient temperature and current ambient humidity of the vehicle; and determining the current operating condition of the hybrid engine based on the speed, the load, the intake flow, the EGR rate, the current ambient temperature and the current ambient humidity.

[0015] Through the above-mentioned technical means, the embodiment of the present application can comprehensively calculate the temperature difference and pressure difference before and after the intercooler by taking into account various factors, and consider various factors under the engine operating conditions, thereby improving the accuracy of the calculation results of the amount of water precipitation in the intake manifold, helping to optimize engine performance and prevent potential engine misfires.

[0016] A second aspect of the present application provides a water analysis and fire pre-control device for a vehicle exhaust gas recirculation system, comprising: a first acquisition module, used to obtain the amount of water analysis caused by condensation of the external exhaust gas recirculation system EGR under normal pressure before the compressor during the operation of the vehicle's hybrid engine; a calculation module, used to detect the temperature difference and pressure difference before and after the intercooler, and calculate the saturated water content of the supercharged mixture based on the temperature difference, the pressure difference and the actual saturated vapor pressure to obtain the amount of water precipitated in the intake manifold; a generation module, used to determine the water precipitation level of the water precipitated in the intake manifold based on the temperature difference and the pressure difference, and generate the active intervention action of the hybrid vehicle controller of the vehicle for water analysis and fire pre-control according to the water analysis amount and the water precipitation level.

[0017] Through the above-mentioned technical means, the embodiment of the present application can calculate the amount of water precipitation caused by EGR condensation under normal pressure before the compressor generated during the operation of the vehicle hybrid engine and the amount of water precipitation in the intake manifold generated by the intercooler, and make different pre-control decisions for different situations. It can effectively respond to the user's requirements for engine misfire pre-control in different scenarios, calculate and intervene in advance through the hybrid vehicle controller, and effectively improve the efficiency and accuracy of the processing through targeted processing, thereby avoiding the occurrence of engine misfires and improving the user's driving experience and usage stickiness.

[0018] Optionally, in one embodiment of the present application, the generation module includes: a first judgment unit, used to judge that the water precipitation level is the first level when the temperature difference is less than or equal to a first preset temperature difference and the pressure difference is less than or equal to the first preset pressure difference; a second judgment unit, used to judge that the water precipitation level is the second level when the temperature difference is greater than the first preset temperature difference and less than or equal to the second preset temperature difference and / or the pressure difference is greater than the first preset pressure difference and less than or equal to the second preset pressure difference; a third judgment unit, used to judge that the water precipitation level is the third level when the temperature difference is greater than the second preset temperature difference and the pressure difference is greater than the second preset pressure difference.

[0019] Through the above-mentioned technical means, the embodiment of the present application can divide the amount of water precipitation in the intake manifold caused by the temperature difference and pressure difference before and after different intercoolers into different levels, so as to clearly understand the current amount of water precipitation in the intake manifold, facilitate the generation of different active intervention actions according to the corresponding levels, and effectively improve the efficiency of the hybrid engine EGR water precipitation misfire pre-control.

[0020] Optionally, in one embodiment of the present application, the generation module further includes: a first determination unit, used for, when the water precipitation level is the first level, the active intervention action is no intervention; a second determination unit, used for, when the water precipitation level is the second level, the active intervention action is to reduce the EGR valve opening of the vehicle to the target opening and increase the instantaneous torque of the vehicle's motor to the first target torque; a third determination unit, used for, when the water precipitation level is the third level, the active intervention action is to close the fuel supply of the hybrid engine and the EGR valve of the vehicle, and increase the instantaneous torque of the vehicle's motor to the second target torque, wherein the second target torque is greater than the first target torque.

[0021] Through the above-mentioned technical means, the embodiments of the present application can make different active intervention actions for different water precipitation levels, and make corresponding effective active intervention actions for the vehicle under the conditions of pre-control that the engine will not misfire, may misfire, or is seriously likely to misfire, and avoid the engine misfire before it occurs, which can effectively improve the user's driving experience, and after the water precipitation level returns to normal, secondary strategy planning can be re-performed, and the flexibility and intelligence level have been greatly improved.

[0022] Optionally, in one embodiment of the present application, it also includes: a detection module for detecting the water precipitation rate in the intake manifold; an establishment module for establishing a correspondence between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold and the intake temperature, pressure, and the current operating condition of the hybrid engine; a first determination module for determining the active intervention action based on the correspondence, combined with at least one of the torque distribution information of the motor control unit of the vehicle and the battery power information.

[0023] Through the above-mentioned technical means, the embodiment of the present application can comprehensively consider the influence of the amount of water precipitated in the intake manifold, the water precipitated rate, the intake temperature, pressure and the engine operating conditions in the process of generating active intervention actions, thereby increasing the effectiveness and accuracy of the active intervention actions generated by the present application, and taking the operation of the motor into consideration to ensure the normal operation of the vehicle and the user's driving experience.

[0024] Optionally, in one embodiment of the present application, it also includes: a second acquisition module, used to obtain the speed, load, intake flow, EGR rate of the hybrid engine and the current ambient temperature and current ambient humidity of the vehicle before establishing the correspondence between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold and the intake temperature, pressure, and the current operating condition of the hybrid engine; a second determination module, used to determine the current operating condition of the hybrid engine based on the speed, the load, the intake flow, the EGR rate, the current ambient temperature and the current ambient humidity.

[0025] Through the above-mentioned technical means, the embodiment of the present application can comprehensively calculate the temperature difference and pressure difference before and after the intercooler by taking into account various factors, and consider various factors under the engine operating conditions, thereby improving the accuracy of the calculation results of the amount of water precipitation in the intake manifold, helping to optimize engine performance and prevent potential engine misfires.

[0026] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the water analysis fire pre-control method of the vehicle exhaust gas recirculation system as described in the above embodiment.

[0027] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned water analysis fire pre-control method for a vehicle exhaust gas recirculation system.

[0028] A fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned water analysis fire pre-control method of the vehicle exhaust gas recirculation system.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 A flow chart of a method for pre-controlling water separation fire in a vehicle exhaust gas recirculation system according to an embodiment of the present application;

[0032] Figure 2 This is a working diagram of a gas-liquid separation, collection device and analysis control system according to one embodiment of the present application;

[0033] Figure 3 This is a flow chart of a water separation fire pre-control method for a vehicle exhaust gas recirculation system according to one embodiment of the present application;

[0034] Figure 4 It is a structural schematic diagram of a water separation fire pre-control device for a vehicle exhaust gas recirculation system provided according to an embodiment of the present application;

[0035] Figure 5 It is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application.

[0036] Reference numerals:

[0037] 10-water analysis fire pre-control device for vehicle exhaust gas recirculation system: 100-first acquisition module, 200-calculation module and 300-generation module; 501-memory, 502-processor and 503-communication interface. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0039] The following describes the water separation and fire pre-control method and device of the vehicle exhaust gas recirculation system of the embodiment of the present application with reference to the accompanying drawings. In view of the related technologies mentioned in the above background technology, most of them are to reduce the formation of condensed water by controlling the EGR valve or to reduce the EGR rate to improve the combustion stability of the engine, but cannot avoid EGR water separation and condensation. Once the condensed water accumulates to a certain extent, it is easy to cause engine misfire, which is difficult to meet the user's use needs in actual scenarios, and the user's use experience and viscosity are not high. The present application provides a water separation and fire pre-control method of the vehicle exhaust gas recirculation system, in which the water separation amount caused by the EGR condensation under the normal pressure state before the compressor generated during the operation of the vehicle hybrid engine and the water precipitation amount in the intake manifold generated by the intercooler can be calculated, and different pre-control decisions can be made for different situations. As a result, it is achieved to effectively respond to the user's requirements for engine misfire pre-control in different scenarios, calculate and intervene in advance through the hybrid vehicle controller, and effectively improve the efficiency and accuracy of the processing through targeted processing, thereby avoiding the occurrence of engine misfires and improving the user's driving experience and use viscosity. This solves the problem that most of the related technologies reduce the formation of condensed water by controlling the EGR valve or reduce the EGR rate to improve engine combustion stability, but cannot avoid EGR water precipitation and condensation. Once the condensed water accumulates to a certain extent, it will easily cause engine misfire, making it difficult to meet the user's actual usage needs, and the user experience and viscosity are not high.

[0040] Before explaining the water analysis fire pre-control method of the vehicle exhaust gas recirculation system in the embodiment of the present application, the vehicle and the gas-liquid separation, collection device and analysis control system involved in the embodiment of the present application are first explained.

[0041] The embodiment of the present application mainly pre-controls the EGR water separation of the vehicle through the vehicle exhaust gas recirculation system, thereby avoiding the risk of engine misfire. Among them, the vehicles to which the embodiment of the present application is applicable include but are not limited to hybrid vehicles with EV mode. The vehicle is equipped with a hybrid engine with a low-pressure EGR system and a gas-liquid separation, collection and analysis control system. The vehicle and engine are integrated with a hybrid vehicle controller (HCU), an engine control unit (ECU), a parameter information acquisition module, and an information processing module.

[0042] Among them, the parameter information acquisition module is used to collect the above-mentioned vehicle parameter information; the information processing module is used to analyze and process the parameter information obtained by the acquisition module. By reading the parameters of each controller, the water condensed after the EGR exhaust gas at normal pressure before the compressor is mixed with fresh air can be calculated. At the same time, the temperature and pressure changes before and after the intercooler can be monitored synchronously, and the saturated water content of the supercharged mixed gas can be calculated based on the saturated vapor pressure, so as to determine the amount of water precipitation in the intake manifold, and then control the HCU to participate in the calculation in advance according to the water precipitation level to take the initiative to intervene and avoid the risk of engine misfire in advance.

[0043] The gas-liquid separation, collection device and analysis and control system include but are not limited to a gas-liquid separation device, a gas-liquid collection device and a gas-liquid analysis and control system.

[0044] Specifically, Figure 1 A flow chart of a method for pre-controlling water separation fire in a vehicle exhaust gas recirculation system provided in an embodiment of the present application.

[0045] like Figure 1 As shown, the water separation fire pre-control method of the vehicle exhaust gas recirculation system includes the following steps:

[0046] In step S101, during the operation of the hybrid engine of the vehicle, the amount of water separation caused by condensation of the external exhaust gas recirculation system EGR under normal pressure before the compressor is obtained.

[0047] It is understood that the compressor is a key component in the engine, which is mainly used to increase the pressure of the air taken in. The pre-compressor area here can be understood as the area or state before the air enters the compressor. At this time, the air is at normal pressure or close to normal pressure and has not yet been compressed by the compressor.

[0048] In some embodiments, during the operation of the vehicle's engine, the EGR system introduces a small portion of the combustion exhaust gas from the exhaust pipe into the intake pipe, mixes it with fresh air, and then enters the combustion chamber. The mixed gas is cooled in front of the compressor (i.e., at normal pressure). During the cooling process, the water vapor in the mixed gas may gradually condense into liquid water and enter the intake manifold when it is cooled in the intake manifold. When the water vapor in the EGR exhaust gas condenses into water, the composition of the mixed gas will change. Too many water molecules will occupy the space in the combustion chamber, reducing the effective mixing of fresh air and fuel, causing the mixture to be too lean. In some cases, if the mixture is too lean, the spark plug may not be able to generate enough energy to ignite the mixture during ignition, resulting in ignition difficulties, and the engine may misfire. It should be noted that engine misfire here refers to the mixture in the cylinder not being burned to do work, but being directly discharged.

[0049] For example, the present application can firstly, but is not limited to, read the EGR exhaust gas parameters under normal pressure before the compressor through the engine control unit (ECU): such as temperature, humidity (usually expressed as absolute humidity, that is, the mass of water vapor in unit volume of exhaust gas), flow rate, etc.; fresh air parameters: such as temperature, humidity, flow rate, etc.; mixed parameters: such as the temperature and pressure of the mixed gas (usually equal to atmospheric pressure before the compressor), etc.

[0050] The ECU then transmits this data to the hybrid vehicle controller (HCU), which calculates the absolute humidity of the mixture through the humidity of the EGR exhaust gas and fresh air and their flow rates. Furthermore, the saturated vapor pressure of the mixture at this time also needs to be determined, where the saturated vapor pressure here can be understood as the pressure when the water vapor in the air reaches a saturated state at a certain temperature. It is a function of temperature and can be calculated by querying the saturated vapor pressure table or using related formulas. At a given temperature of the mixture, the corresponding saturated vapor pressure can be found.

[0051] Finally, the actual water content and saturated water content of the mixed gas are calculated, wherein the actual water content of the mixed gas can be understood as its absolute humidity, and the saturated water content can be calculated by the saturated vapor pressure and the pressure of the mixed gas. The amount of water separated under normal pressure before the compressor in the embodiment of the present application can be understood as the difference between the actual water content of the mixed gas and the saturated water content multiplied by the total volume of the mixed gas.

[0052] The embodiment of the present application can obtain the amount of water separation caused by EGR condensation in the external exhaust gas recirculation system under normal pressure before the compressor, so as to perform subsequent EGR water separation processing.

[0053] Step S102, detecting the temperature difference and pressure difference before and after the intercooler, and calculating the saturated water content of the supercharged mixed gas based on the temperature difference, pressure difference and actual saturated vapor pressure, so as to obtain the amount of water precipitation in the intake manifold.

[0054] It can be understood that the saturated water content of the mixture here refers to the maximum amount of water vapor that can be contained in the mixture at a certain temperature and pressure. When the water vapor content in the mixture exceeds this value, the water vapor will begin to condense into liquid water. The amount of water precipitation in the intake manifold here refers to the amount of water vapor in the mixture condensed into liquid water due to changes in temperature and pressure before entering the engine intake manifold. The actual saturated vapor pressure here can be understood as the saturated vapor pressure corresponding to the actual temperature after intercooling in the intercooler.

[0055] In other embodiments, the mixed gas will be cooled through the intercooler, and this process may also produce a certain amount of water precipitation. Changes in temperature and pressure will affect the final amount of water precipitation, so the embodiment of the present application can also detect the temperature difference, pressure difference and actual saturated vapor pressure before and after the intercooler cooling to calculate the saturated water content of the mixed gas after supercharging, thereby calculating the amount of water precipitation of the mixed gas after cooling and supercharging through the intercooler, that is, the amount of water precipitation in the intake manifold.

[0056] When detecting the temperature difference and pressure difference before and after the intercooler, the embodiment of the present application can first detect the temperature of the intercooler before cooling by using relevant sensors, and then detect the temperature of the intercooler after cooling by using sensors, and then subtract the temperature before intercooling from the temperature after intercooling to obtain the temperature difference before and after the intercooler. Similarly, the pressure difference before and after the intercooler can be obtained by subtracting the pressure before and after the intake air from the pressure after intake air.

[0057] For example, assuming the temperature before intercooling is 150°C, the temperature after intercooling is 50°C, the pressure before intercooling is 2.0 bar, and the pressure after intercooling is 1.8 bar, the temperature difference is 100°C and the pressure difference is 0.2 bar. The ECU is also used to read these parameters, and the HCU is used to calculate the saturated water content of the supercharged mixed gas under the actual saturated vapor pressure at the temperature difference and pressure difference. Then, the amount of water precipitation in the intake manifold can be obtained by combining the actual temperature and pressure in the intake manifold at this time.

[0058] The embodiment of the present application can calculate the saturated water content of the supercharged mixture based on the temperature change and pressure change of the intercooler, and obtain the final water precipitation amount in the intake manifold. By comprehensively considering various factors, the accuracy of the obtained water precipitation amount in the intake manifold is improved, which helps to understand the moisture situation inside the engine, and further improve the effectiveness of the engine misfire pre-control strategy.

[0059] Step S103, determining the water precipitation level of the water precipitation amount in the intake manifold based on the temperature difference and the pressure difference, and generating an active intervention action of the hybrid vehicle controller of the vehicle for water precipitation misfire pre-control according to the water precipitation amount and the water precipitation level.

[0060] As a possible implementation method, the embodiment of the present application can generate certain active intervention actions for water analysis and misfire pre-control through the hybrid vehicle controller after calculating the EGR water analysis amount under normal pressure before the compressor and the EGR water analysis amount after intercooler boost, that is, the amount of water precipitated in the intake manifold.

[0061] For example, after obtaining the amount of EGR water produced under the normal pressure state before the compressor, the present application can, but is not limited to, controlling the gas-liquid separation, collection device and analysis control system in the hybrid vehicle controller to separate the water condensed from the EGR under the normal pressure state before the compressor by using a centrifugal spiral structure, and controlling the gas-liquid collection device to collect the EGR water under the normal pressure state before the compressor and calculate the EGR water separation rate under the normal pressure state before the compressor by using a liquid level sensor, a liquid flow meter and a temperature sensor; and then reading the above information through the gas-liquid analysis and control system, and The position sensor and the amount of EGR water separated under normal pressure before the compressor are used to determine whether the liquid level of the separated EGR water under normal pressure before the compressor exceeds the warning line L1. When it exceeds the warning line L1, the drain valve is controlled to open to discharge the water in the collector. When the liquid level is lower than the lowest liquid level line L0, the drain valve is controlled to close and stop draining, ensuring that there is always water in the collector to avoid leakage caused by the intake pipe being connected to the atmosphere; when the engine is turned off, the vehicle stops running, and the driving cycle ends, the drain valve is controlled to open to discharge all the water in the collector to avoid condensation and freezing of water in the collector in cold weather, causing system failure.

[0062] Furthermore, the embodiment of the present application can also use the hybrid vehicle controller to implement different engine misfire pre-control management strategies for the different levels of water precipitation in the intake manifold generated after the intercooler is supercharged. Specifically, the embodiment of the present application can first classify the amount of water precipitation in the intake manifold according to the temperature difference and pressure difference of the intercooler. For example, the water precipitation level is set, and it is divided into the first level, the second level, and the third level according to the amount of water precipitation in the intake manifold. After dividing the water precipitation level, the embodiment of the present application generates an active intervention action for water precipitation misfire pre-control based on the water precipitation level, for example, reducing the opening of the EGR valve to reduce the amount of water precipitation, etc.

[0063] It should be noted that when the hybrid vehicle controller uses different engine misfire pre-control management strategies for the water precipitation levels in the intake manifold produced after the intercooler is supercharged and generates active intervention actions such as reducing the opening of the EGR valve to reduce the amount of water precipitation, the gas-liquid separation, collection device and analysis control system are also working in the same way. Figure 2 This is a flow chart of the gas-liquid separation, collection device and analysis control system of one embodiment of the present application. Figure 2As shown, first, the gas-liquid separation device continuously separates the EGR moisture generated under normal pressure before the compressor through the gas-liquid separation device, and also continuously separates the EGR moisture in the intake manifold generated after being pressurized by the intercooler through the gas-liquid separation device; then, the gas-liquid collection device uses a liquid level sensor, a liquid flow meter and a temperature sensor to collect and calculate the condensed water generation rate, and finally reads this information through the gas-liquid analysis and control system, and determines whether the liquid level exceeds the warning line L1 through the liquid level sensor. When it exceeds the warning line L1, the drain valve is controlled to open to discharge the moisture in the collector. When the liquid level is lower than the lowest liquid level line L0, the drain valve is controlled to close and stop draining, ensuring that there is always water in the collector to avoid leakage caused by the intake pipe being connected to the atmosphere.

[0064] The embodiments of the present application can make different decisions on the amount of water precipitation caused by EGR condensation under normal pressure before the compressor during the operation of the vehicle hybrid engine and the amount of water precipitation in the intake manifold generated by the intercooler. It can effectively respond to the user's requirements for engine misfire pre-control in different scenarios, calculate and intervene in advance through the hybrid vehicle controller, and effectively improve the efficiency and accuracy of the processing through targeted processing, thereby avoiding the occurrence of engine misfires and improving the user's driving experience and usage stickiness.

[0065] Optionally, in one embodiment of the present application, the water precipitation level is determined based on the temperature difference and the pressure difference, including: when the temperature difference is less than or equal to a first preset temperature difference and the pressure difference is less than or equal to the first preset pressure difference, the water precipitation level is determined to be the first level; when the temperature difference is greater than the first preset temperature difference and less than or equal to the second preset temperature difference and / or the pressure difference is greater than the first preset pressure difference and less than or equal to the second preset pressure difference, the water precipitation level is determined to be the second level; when the temperature difference is greater than the second preset temperature difference and the pressure difference is greater than the second preset pressure difference, the water precipitation level is determined to be the third level.

[0066] It is understandable that the first preset temperature difference, the second preset temperature difference, the first preset pressure difference and the second preset pressure difference can be understood as different preset temperature difference thresholds and pressure difference thresholds. When the front and rear temperature difference and pressure difference before and after the intercooler do not reach or exceed these preset values, different active intervention actions need to be generated. Different settings and adjustments can be made by professionals in this field according to the actual situation or actual needs of the vehicle. This is only an exemplary description without specific requirements.

[0067] In some embodiments, when the vehicle's hybrid vehicle controller actively intervenes in the amount of water precipitation in the intake manifold generated after intercooler supercharging, the embodiments of the present application can first determine the water level of the water precipitation in the intake manifold based on the temperature difference and pressure difference before and after the intercooler, so as to make more accurate and effective active intervention actions for different precipitation amounts.

[0068] For example, the embodiment of the present application can determine the water precipitation level of the water precipitation in the intake manifold when the temperature difference is less than or equal to the first preset temperature difference and the pressure difference is less than or equal to the first preset pressure difference as the first level; determine the water precipitation level of the water precipitation in the intake manifold when the temperature difference before and after the intercooler is greater than the first preset temperature difference and less than or equal to the second preset temperature difference and / or the pressure difference is greater than the first preset pressure difference and less than or equal to the second preset pressure difference as the second level; determine the water precipitation level of the water precipitation in the intake manifold when the temperature difference before and after the intercooler is greater than the second preset temperature difference and the pressure difference is greater than the second preset pressure difference as the third level.

[0069] The embodiment of the present application can classify the amount of water precipitation in the intake manifold caused by the temperature difference and pressure difference before and after different intercoolers into different levels, so as to clearly understand the current amount of water precipitation in the intake manifold, facilitate the generation of different active intervention actions according to the corresponding levels, and effectively improve the efficiency of the hybrid engine EGR water precipitation misfire pre-control.

[0070] Optionally, in one embodiment of the present application, it also includes: detecting the water precipitation rate in the intake manifold; establishing a correspondence between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold and the intake temperature, pressure, and current operating conditions of the hybrid engine; based on the correspondence, determining an active intervention action in combination with at least one of the torque distribution information of the vehicle's motor control unit and the battery power information.

[0071] In some embodiments, the hybrid engine of the vehicle is continuously operating, which may cause EGR water separation. If the EGR water separation is not timely, excessive water may be precipitated in the intake manifold, thereby causing the engine to misfire.

[0072] Therefore, when determining the active intervention action, the present application may, but is not limited to, first detect the water separation rate in the intake manifold through the gas-liquid collection device mentioned in the previous embodiment, so as to generate a response strategy in time when the water separation rate is too high.

[0073] And considering that during the operation of the engine, different operating conditions of the engine itself (such as high load, low speed, etc.) will affect the intake flow, temperature and pressure, and changes in intake temperature and pressure will affect the water vapor content in the air, and thus have a certain impact on the amount of water precipitation in the intake manifold and the rate of water precipitation in the intake manifold. For example, when the intake temperature is low, the amount of water precipitation in the intake manifold may increase. Therefore, the embodiment of the present application can establish a corresponding relationship between the amount of water precipitation in the intake manifold, the rate of water precipitation in the intake manifold, and the intake temperature, pressure, and current operating conditions of the hybrid engine, so as to help the vehicle determine in advance whether there is a risk of excessive water precipitation in the intake manifold, so as to calculate and generate certain active intervention actions in advance when it is determined that the amount of water precipitation in the intake manifold may be excessive.

[0074] Furthermore, in the operation of the hybrid engine, the relevant operation of the motor is also involved, which needs to be regarded as the main intervention action execution object when generating the active intervention action. Therefore, the embodiment of the present application can also combine the torque distribution information of the vehicle's motor control unit and at least one of the battery power information to comprehensively determine the active intervention action generated by the hybrid vehicle controller.

[0075] The embodiment of the present application can comprehensively consider the amount of water precipitated in the intake manifold, the water precipitate rate, the influence of the intake temperature, pressure and the engine operating conditions in the process of generating active intervention actions, thereby increasing the effectiveness and accuracy of the active intervention actions generated by the present application, and taking the operation of the motor into consideration to ensure the normal operation of the vehicle and the driving experience of the user.

[0076] Optionally, in one embodiment of the present application, an active intervention action of the hybrid vehicle controller for water separation misfire pre-control is generated according to the amount of water separation and the water separation level, including: when the water separation level is the first level, the active intervention action is no intervention; when the water separation level is the second level, the active intervention action is to reduce the vehicle's EGR valve opening to the target opening and increase the vehicle's motor instantaneous torque to the first target torque; when the water separation level is the third level, the active intervention action is to close the hybrid engine's fuel supply and the vehicle's EGR valve, and increase the vehicle's motor instantaneous torque to the second target torque, wherein the second target torque is greater than the first target torque.

[0077] In the actual implementation process, while the hybrid vehicle controller generates an active intervention action to separate EGR water separation based on the amount of EGR water separation under normal pressure before the compressor, it will also generate other active intervention actions for EGR water separation misfire pre-control based on the water separation level.

[0078] Specifically, Figure 3 This is a flow chart of a method for pre-controlling water separation fire in a vehicle exhaust gas recirculation system according to an embodiment of the present application. Figure 3As shown:

[0079] Step S301, first the vehicle is operated in a hybrid mode with the whole vehicle powered;

[0080] Step S302, the ECU reads the engine operating conditions, EGR rate, ambient temperature and humidity, and the temperature and pressure values ​​before and after the intercooler, and calculates the temperature difference and pressure difference before and after the intercooler;

[0081] Step S303, determining whether the temperature difference before and after the intercooler is less than or equal to a first preset temperature difference S1 and whether the pressure difference before and after the intercooler is less than or equal to a first preset pressure difference P1;

[0082] Step S304 , when the temperature difference before and after the intercooler is less than or equal to the first preset temperature difference S1 and the pressure difference before and after the intercooler is less than or equal to the first preset pressure difference P1 , it is determined that the water precipitation level is the first level.

[0083] Step S305: When the water precipitation level is the first level, it is determined that the engine has no risk of misfire, so the hybrid vehicle controller does not need to actively intervene at this time.

[0084] Step S306, determining whether the temperature difference before and after the intercooler is greater than the first preset temperature difference S1 and less than or equal to the second preset temperature difference S2 and / or whether the pressure difference before and after the intercooler is greater than the first preset pressure difference P1 and less than or equal to the second preset pressure difference P2, when the temperature difference before and after the intercooler is greater than the first preset temperature difference S1 and less than or equal to the second preset temperature difference S2 and / or the pressure difference before and after the intercooler is greater than the first preset pressure difference P1 and less than or equal to the second preset pressure difference P2, determining that the water precipitation level is the second level;

[0085] Step S307: when the water precipitation level is the second level, it is determined that there may be a risk of engine single cylinder misfire, so at this time, the hybrid vehicle controller can be used to control the motor to increase the instantaneous torque to a certain target torque for active intervention, and at the same time reduce the EGR valve opening to a certain target opening to reduce the amount of water precipitation;

[0086] Step S308, determining whether the temperature difference before and after the intercooler is greater than the second preset temperature difference S2 and whether the pressure difference before and after the intercooler is greater than the second preset pressure difference P2;.

[0087] Step S309, when the temperature difference before and after the intercooler is greater than the second preset temperature difference S2 and the pressure difference before and after the intercooler is greater than the second preset pressure difference P2, it is determined that the water precipitation level is the third level;

[0088] Step S310, when the water precipitation level is the third level, it is determined that the engine may have a serious risk of misfire. Therefore, the HCU can control the engine to cut off fuel and close the EGR valve at this time, relying entirely on the vehicle's motor to provide the instantaneous required torque output, that is, temporarily starting EV pure electric driving.

[0089] Step S311, the HCU re-detects whether the water precipitation level has dropped to the first level. If it has not dropped to the first level, the EV pure electric driving is maintained;

[0090] Step S312, when the HCU reads that the water separation level has dropped to the first level, it is determined again that the engine has no fire risk. At this time, the engine and motor can be coordinated and controlled to perform secondary torque distribution. The HCU exits the misfire pre-control intervention, the EGR control strategy returns to normal, and the vehicle runs stably.

[0091] The embodiments of the present application can make different active intervention actions according to different water precipitation levels, and make corresponding effective active intervention actions for the vehicle under the conditions of pre-control that the engine will not misfire, may misfire, or is seriously likely to misfire, and avoid engine misfire before it occurs, which can effectively improve the user's driving experience, and after the water precipitation level returns to normal, secondary strategy planning can be re-performed, and the flexibility and intelligence level are greatly improved.

[0092] Optionally, in one embodiment of the present application, before establishing the correspondence between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold and the intake temperature, pressure, and the current operating condition of the hybrid engine, it also includes: obtaining the speed, load, intake flow, EGR rate of the hybrid engine and the current ambient temperature and current ambient humidity of the vehicle; determining the current operating condition of the hybrid engine based on the speed, load, intake flow, EGR rate, current ambient temperature and current ambient humidity.

[0093] In some embodiments, the current operating condition of the engine may also affect the amount of water precipitated in the intake manifold. Therefore, the present application may, but is not limited to, obtain the speed, load, intake air flow, EGR rate of the hybrid engine, and the current ambient temperature and humidity of the vehicle, etc., to comprehensively analyze the operating condition of the hybrid engine.

[0094] For example, the present application can, but is not limited to, obtain the engine speed and load through the engine control system. The speed of the hybrid engine can reflect the working state of the engine and affect the intake flow and combustion efficiency; the load can indicate the load currently borne by the engine, which is closely related to fuel consumption, intake volume, etc.; the EGR rate (exhaust gas recirculation rate) is calculated by measuring the carbon dioxide concentration in the intake air, which can reflect what proportion of the exhaust gas is reintroduced into the cylinder for combustion; the intake flow is measured by a flow meter, which will directly affect the combustion effect and performance of the engine; the ambient temperature and humidity are measured by an environmental sensor, which can affect the intake temperature and humidity of the engine, and thus affect the combustion efficiency and emissions.

[0095] The embodiment of the present application can calculate the temperature difference and pressure difference before and after the intercooler by comprehensively considering various factors, and consider various factors under the engine operating conditions, thereby improving the accuracy of the calculation results of the amount of water precipitation in the intake manifold, helping to optimize engine performance and prevent potential engine misfires.

[0096] According to the water separation and fire pre-control method of the vehicle exhaust gas recirculation system proposed in the embodiment of the present application, the water separation amount caused by the EGR condensation under the normal pressure state before the compressor generated during the operation of the vehicle hybrid engine and the water separation amount in the intake manifold generated by the intercooler can be calculated, and different pre-control decisions can be made for different situations. In this way, it is possible to effectively respond to the user's requirements for engine misfire pre-control in different scenarios, calculate in advance through the hybrid vehicle controller and make dominant interventions, and effectively improve the efficiency and accuracy of the processing through targeted processing, thereby avoiding the occurrence of engine misfires and improving the user's driving experience and use viscosity. In this way, it is solved that most of the related technologies reduce the formation of condensed water by controlling the EGR valve or reduce the EGR rate to improve the engine combustion stability, but cannot avoid EGR water separation and condensation. Once the condensed water accumulates to a certain extent, it is easy to cause engine misfires, which is difficult to meet the user's actual use needs in the scene, and the user's use experience and viscosity are not high.

[0097] Next, the water analysis and fire pre-control device of the vehicle exhaust gas recirculation system proposed in the embodiment of the present application is described with reference to the accompanying drawings.

[0098] Figure 4 It is a structural schematic diagram of a water analysis fire pre-control device of a vehicle exhaust gas recirculation system according to an embodiment of the present application.

[0099] like Figure 4 As shown, the water separation fire pre-control device 10 of the vehicle exhaust gas recirculation system includes: a first acquisition module 100, a calculation module 200 and a generation module 300.

[0100] The first acquisition module 100 is used to acquire the amount of water separation caused by condensation of the external exhaust gas recirculation system EGR under normal pressure before the compressor during the operation of the hybrid engine of the vehicle.

[0101] The calculation module 200 is used to detect the temperature difference and pressure difference before and after the intercooler, and calculate the saturated water content of the supercharged mixed gas based on the temperature difference, pressure difference and actual saturated vapor pressure to obtain the amount of water precipitation in the intake manifold.

[0102] The generation module 300 is used to determine the water precipitation level of the water precipitation amount in the intake manifold based on the temperature difference and the pressure difference, and generate an active intervention action of the vehicle hybrid vehicle controller for water precipitation misfire pre-control according to the water precipitation amount and the water precipitation level.

[0103] Optionally, in one embodiment of the present application, the generation module 300 includes: a first determination unit, a second determination unit and a third determination unit.

[0104] The first determination unit is used to determine that the water precipitation level is the first level when the temperature difference is less than or equal to the first preset temperature difference and the pressure difference is less than or equal to the first preset pressure difference.

[0105] The second determination unit is used to determine that the water precipitation level is the second level when the temperature difference is greater than the first preset temperature difference and less than or equal to the second preset temperature difference and / or the pressure difference is greater than the first preset pressure difference and less than or equal to the second preset pressure difference.

[0106] The third determination unit is used to determine that the water precipitation level is a third level when the temperature difference is greater than the second preset temperature difference and the pressure difference is greater than the second preset pressure difference.

[0107] Optionally, in one embodiment of the present application, the generating module 300 further includes: a first determining unit, a second determining unit and a third determining unit.

[0108] The first determination unit is used to determine that the active intervention action is no intervention when the water precipitation level is the first level.

[0109] The second determination unit is used for actively intervening by reducing the EGR valve opening of the vehicle to a target opening and increasing the instantaneous torque of the motor of the vehicle to a first target torque when the water precipitation level is the second level.

[0110] The third determination unit is used to actively intervene by closing the fuel supply of the hybrid engine and the EGR valve of the vehicle when the water precipitation level is the third level, and increasing the instantaneous torque of the vehicle's motor to a second target torque, wherein the second target torque is greater than the first target torque.

[0111] Optionally, in one embodiment of the present application, it further includes: a detection module, an establishment module and a first determination module.

[0112] Among them, the detection module is used to detect the water separation rate in the intake manifold.

[0113] A module is established to establish a corresponding relationship between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold and the intake temperature, pressure, and current operating conditions of the hybrid engine.

[0114] The first determination module is used to determine an active intervention action based on the corresponding relationship and in combination with at least one of the torque distribution information of the motor control unit of the vehicle and the battery power information.

[0115] Optionally, in one embodiment of the present application, it further includes: a second acquisition module and a second determination module.

[0116] Among them, the second acquisition module is used to obtain the speed, load, intake flow, EGR rate of the hybrid engine and the current ambient temperature and current ambient humidity of the vehicle before establishing the correspondence between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold and the intake temperature, pressure, and the current operating conditions of the hybrid engine.

[0117] The second determination module is used to determine the current operating condition of the hybrid engine based on the speed, load, intake air flow, EGR rate, current ambient temperature and current ambient humidity.

[0118] It should be noted that the aforementioned explanation of the embodiment of the water analysis and fire pre-control method of the vehicle exhaust gas recirculation system is also applicable to the water analysis and fire pre-control device of the vehicle exhaust gas recirculation system of this embodiment, and will not be repeated here.

[0119] According to the water separation and fire pre-control device of the vehicle exhaust gas recirculation system proposed in the embodiment of the present application, the water separation amount caused by the EGR condensation under the normal pressure state before the compressor generated during the operation of the vehicle hybrid engine and the water separation amount in the intake manifold generated by the intercooler can be calculated, and different pre-control decisions can be made for different situations. In this way, it is possible to effectively respond to the user's requirements for engine misfire pre-control in different scenarios, calculate in advance through the hybrid vehicle controller and make dominant interventions, and effectively improve the efficiency and accuracy of the processing through targeted processing, thereby avoiding the occurrence of engine misfires and improving the user's driving experience and use viscosity. In this way, it is solved that most of the related technologies reduce the formation of condensed water by controlling the EGR valve or reduce the EGR rate to improve the engine combustion stability, but cannot avoid EGR water separation and condensation. Once the condensed water accumulates to a certain extent, it is easy to cause engine misfires, which is difficult to meet the user's actual use needs in the scene, and the user's use experience and viscosity are not high.

[0120] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0121] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0122] When the processor 502 executes the program, the water separation fire pre-control method of the vehicle exhaust gas recirculation system provided in the above embodiment is implemented.

[0123] Furthermore, the vehicle also includes:

[0124] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0125] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0126] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0127] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0128] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0129] The processor 502 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0130] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned water analysis fire pre-control method for a vehicle exhaust gas recirculation system.

[0131] An embodiment of the present application also provides a computer program product, including a computer program, which can run computer instructions. When the computer instructions are executed by a processor, the water analysis and fire pre-control method of the vehicle exhaust gas recirculation system provided in the embodiment of the present application is implemented.

[0132] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0133] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0134] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0135] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0136] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of multiple of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0137] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0138] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0139] The storage medium mentioned above may be a read-only memory, a disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for pre-controlling water separation fire in a vehicle exhaust gas recirculation system, characterized in that: The following steps are involved: During the operation of the vehicle's hybrid engine, the amount of water separation caused by condensation of the external exhaust gas recirculation system EGR under normal pressure before the compressor is obtained; Detecting the temperature difference and pressure difference before and after the intercooler, and calculating the saturated water content of the supercharged mixed gas based on the temperature difference, the pressure difference and the actual saturated vapor pressure, so as to obtain the amount of water precipitation in the intake manifold; The water precipitation level of the water precipitation amount in the intake manifold is determined based on the temperature difference and the pressure difference, and an active intervention action of the hybrid vehicle controller of the vehicle for water precipitation misfire pre-control is generated according to the water precipitation amount and the water precipitation level.

2. The method according to claim 1, characterized in that The step of determining the water precipitation level of the water precipitation amount in the intake manifold based on the temperature difference and the pressure difference includes: When the temperature difference is less than or equal to a first preset temperature difference and the pressure difference is less than or equal to a first preset pressure difference, determining that the water precipitation level is the first level; When the temperature difference is greater than the first preset temperature difference and less than or equal to the second preset temperature difference and / or the pressure difference is greater than the first preset pressure difference and less than or equal to the second preset pressure difference, determining that the water precipitation level is the second level; When the temperature difference is greater than the second preset temperature difference and the pressure difference is greater than the second preset pressure difference, it is determined that the water precipitation level is the third level.

3. The method according to claim 2, characterized in that The generating, according to the water precipitation amount and the water precipitation level, an active intervention action of the hybrid vehicle controller of the vehicle for water precipitation fire pre-control comprises: When the water precipitation level is the first level, the active intervention action is no intervention; When the water precipitation level is the second level, the active intervention action is to reduce the EGR valve opening of the vehicle to a target opening and increase the instantaneous torque of the motor of the vehicle to a first target torque; When the water precipitation level is the third level, the active intervention action is to close the fuel supply of the hybrid engine and the EGR valve of the vehicle, and increase the instantaneous torque of the motor of the vehicle to a second target torque, wherein the second target torque is greater than the first target torque.

4. The method according to claim 1, characterized in that: Also includes: Detect the water precipitation rate in the intake manifold; Establishing a corresponding relationship between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold, and the intake temperature, pressure, and the current operating condition of the hybrid engine; The active intervention action is determined based on the corresponding relationship and in combination with at least one of the torque distribution information of the motor control unit of the vehicle and the battery power information.

5. The method according to claim 4, characterized in that Before establishing the corresponding relationship between the amount of water precipitation in the intake manifold, the water precipitation rate in the intake manifold, the intake temperature, the pressure, and the current operating condition of the hybrid engine, the method further includes: Obtaining the speed, load, intake air flow, EGR rate of the hybrid engine and the current ambient temperature and current ambient humidity of the vehicle; A current operating condition of the hybrid engine is determined based on the speed, the load, the intake air flow, the EGR rate, the current ambient temperature, and the current ambient humidity.

6. A water separation fire pre-control device for a vehicle exhaust gas recirculation system, characterized in that: include: An acquisition module, used for acquiring the amount of water separation caused by condensation of an external exhaust gas recirculation system EGR under a normal pressure state before the compressor during the operation of the hybrid engine of the vehicle; A calculation module, used for detecting the temperature difference and pressure difference before and after the intercooler, and calculating the saturated water content of the supercharged mixed gas based on the temperature difference, the pressure difference and the actual saturated vapor pressure, so as to obtain the amount of water precipitation in the intake manifold; A generation module is used to determine the water precipitation level of the water precipitation amount in the intake manifold based on the temperature difference and the pressure difference, and to generate an active intervention action of the hybrid vehicle controller of the vehicle for water precipitation misfire pre-control according to the water precipitation amount and the water precipitation level.

7. The device according to claim 6, characterized in that The generating module comprises: A first determination unit, configured to determine that the water precipitation level is a first level when the temperature difference is less than or equal to a first preset temperature difference and the pressure difference is less than or equal to a first preset pressure difference; a second determination unit, configured to determine that the water precipitation level is the second level when the temperature difference is greater than a first preset temperature difference and less than or equal to a second preset temperature difference and / or the pressure difference is greater than a first preset pressure difference and less than or equal to a second preset pressure difference; The third determination unit is configured to determine that the water precipitation level is a third level when the temperature difference is greater than a second preset temperature difference and the pressure difference is greater than a second preset pressure difference.

8. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the water analysis fire pre-control method for the vehicle exhaust gas recirculation system as described in any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the water separation misfire pre-control method for a vehicle exhaust gas recirculation system as described in any one of claims 1-5.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed, it is used to implement the water separation fire pre-control method of the vehicle exhaust gas recirculation system as described in any one of claims 1-5.

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