Common rail diesel engine emission amount correction control method, device, equipment and medium

Abstract

The invention discloses a common rail diesel engine emission amount correction control method, device and equipment and a medium. The method comprises the following steps: acquiring vehicle driving process data of a current common rail diesel vehicle in a preset time period; if it is determined that the vehicle running working condition of the current common-rail diesel vehicle meets the preset running working condition judgment condition according to the vehicle running process data, the postprocessor temperature, the engine rotating speed and the engine circulating oil amount of the current common-rail diesel vehicle are obtained; determining a rail pressure correction output value and a fuel injection moment correction output value according to the postprocessor temperature, the engine rotating speed and the engine circulating fuel quantity; and based on the rail pressure correction output value and the fuel injection moment correction output value, controlling and correcting the current engine emission of the common rail diesel vehicle. According to the technical scheme, accurate correction of the original engine emission of the common rail diesel engine is achieved, and therefore effective control over the engine emission under the special working condition is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive engine control, and particularly to a method, device, equipment and medium for correcting and controlling the emissions of a common rail diesel engine. Background Art

[0002] During the operation of a diesel vehicle, when it quickly switches from continuous downhill driving in mountainous areas to climbing with a large throttle, the temperature of the after-treatment system drops significantly due to the long-term reverse-dragging condition, directly resulting in a decrease in the catalytic conversion efficiency of nitrogen oxides. Especially when the urea injection system stops working due to insufficient temperature, the concentration of nitrogen oxides in the exhaust gas will show an instantaneous peak, seriously affecting the vehicle's emission compliance.

[0003] In the existing technical solutions for correcting and controlling vehicle engine emissions, most of them directly correct the model based on the existing emissions, and then achieve the purpose of controlling emissions by correcting the urea injection amount. However, the existing correction control technical solutions are not applicable to special working conditions, especially the driving conditions of continuous uphill and downhill in mountain driving. When the temperature of the post-processor drops below the urea injection starting temperature, it is impossible to effectively control the nitrogen oxide peak generated due to the vehicle's uphill condition. Summary of the Invention

[0004] The present invention provides a method, device, equipment and medium for correcting and controlling the emissions of a common rail diesel engine to achieve precise correction of the original engine emissions of the common rail diesel engine, thereby effectively controlling the engine emissions under special working conditions.

[0005] According to one aspect of the present invention, there is provided a method for correcting and controlling the emissions of a common rail diesel engine, the method comprising:

[0006] Obtaining the vehicle driving process data of the current common rail diesel vehicle within a preset time period;

[0007] If it is determined according to the vehicle driving process data that the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment condition, then obtaining the temperature of the post-processor, the engine speed and the engine cycle fuel quantity of the current common rail diesel vehicle;

[0008] Determining a rail pressure correction output value and an injection timing correction output value according to the temperature of the post-processor, the engine speed and the engine cycle fuel quantity;

[0009] Based on the rail pressure correction output value and the injection timing correction output value, controlling and correcting the engine emissions of the current common rail diesel vehicle.

[0010] According to another aspect of the present invention, there is provided a device for correcting and controlling the emissions of a common rail diesel engine, the device comprising:

[0011] A driving process data acquisition module, configured to acquire vehicle driving process data of a current common rail diesel vehicle within a preset time period;

[0012] A condition judgment module, configured to, if it is determined according to the vehicle driving process data that the vehicle driving condition of the current common rail diesel vehicle meets a preset driving condition judgment condition, acquire the temperature of a post-processor, the engine speed, and the engine fuel injection cycle amount of the current common rail diesel vehicle;

[0013] A corrected output value determination module, configured to determine a rail pressure corrected output value and an injection timing corrected output value according to the temperature of the post-processor, the engine speed, and the engine fuel injection cycle amount;

[0014] An emissions control module, configured to control and correct the engine emissions of the current common rail diesel vehicle based on the rail pressure corrected output value and the injection timing corrected output value.

[0015] According to another aspect of the present invention, there is provided an electronic device, where the electronic device includes:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, the at least one processor is enabled to execute the common rail diesel engine emissions correction control method according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, there is provided a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the common rail diesel engine emissions correction control method according to any embodiment of the present invention is implemented.

[0020] When it is determined that the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment condition in the technical solution of the embodiment of the present invention, the temperature of the post-treatment device, the engine speed, and the engine fuel injection cycle of the current common rail diesel vehicle are obtained. According to the temperature of the post-treatment device, the engine speed, and the engine fuel injection cycle, the rail pressure correction output value and the injection timing correction output value are determined. Based on the rail pressure correction output value and the injection timing correction output value, the engine emissions of the current common rail diesel vehicle are controlled and corrected. The above technical solution determines the rail pressure correction output value and the injection timing correction output value through the characteristics of the temperature of the post-treatment device, the engine speed, and the engine fuel injection cycle when the vehicle enters a special condition, realizing the precise correction of the original emissions of the common rail diesel engine under special conditions, thereby effectively controlling the emissions of the common rail diesel engine under special conditions, and at the same time achieving the effect of reducing the urea consumption, and further saving the resource consumption.

[0021] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 is a flowchart of a method for correcting and controlling the emissions of a common rail diesel engine according to Embodiment 1 of the present invention;

[0024] Figure 2 is a flowchart of a method for correcting and controlling the emissions of a common rail diesel engine according to Embodiment 2 of the present invention;

[0025] Figure 3 is a schematic structural diagram of a device for correcting and controlling the emissions of a common rail diesel engine according to Embodiment 3 of the present invention;

[0026] Figure 4 is a schematic structural diagram of an electronic device for implementing the method for correcting and controlling the emissions of a common rail diesel engine in the embodiment of the present invention. Detailed Description of the Embodiments

[0027] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] Figure 1 It is a flowchart of a method for correcting and controlling the emissions of a common rail diesel engine provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation where a diesel vehicle is driving in mountainous areas and performing the correction and control of the emissions of a common rail diesel engine under the form working conditions of continuous uphill and downhill driving. This method can be executed by a common rail diesel engine emissions correction control device, which can be implemented in the form of hardware and / or software, and the common rail diesel engine emissions correction control device can be configured in an electronic device. As Figure 1 shown, the method includes:

[0031] S110. Obtain the vehicle driving process data of the current common rail diesel vehicle within a preset time period.

[0032] S120. If it is determined according to the vehicle driving process data that the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment condition, then obtain the temperature of the post-processor, the engine speed, and the engine cycle fuel quantity of the current common rail diesel vehicle.

[0033] S130. Determine the rail pressure correction output value and the injection timing correction output value according to the post-processor temperature, the engine speed, and the engine cycle fuel quantity.

[0034] S140. Based on the rail pressure correction output value and the fuel injection timing correction output value, control to correct the engine emissions of the current common rail diesel vehicle.

[0035] Among them, the current common rail diesel vehicle is a common rail engine vehicle to be controlled for emissions correction. The preset time period can be preset by relevant technical personnel according to actual needs. For example, the preset time period can be 1 second, etc.

[0036] It should be noted that the correction function of engine emissions can be integrated into the vehicle as a control function, and relevant personnel such as the driver can determine whether to activate this control function according to actual needs. Therefore, in an optional embodiment, before obtaining the vehicle driving process data of the current common rail diesel vehicle within the preset time period, it further includes: in response to the original emissions correction function activation instruction, obtaining the vehicle performance data of the current common rail diesel vehicle; if it is determined according to the vehicle performance data that the current common rail diesel vehicle meets the original emissions correction function activation condition, then obtaining the vehicle driving process data of the current common rail diesel vehicle within the preset time period.

[0037] Among them, the original emissions correction function is the correction control function of the original engine emissions pre-integrated and deployed in the vehicle, which can be embodied in the form of an activation switch in the vehicle. When a user such as a driver selects the switch to activate the original emissions correction function, an original emissions correction function activation instruction is generated. The controller responds to the original emissions correction function activation instruction and obtains the vehicle performance data of the front common rail diesel vehicle.

[0038] Among them, the vehicle performance data can include ECU (Electronic Control Unit) power-on initialization data, vehicle speed data, engine speed data, gear signal, throttle signal, atmospheric pressure signal, temperature sensor acquisition data, cyclic fuel supply, post-treatment temperature sensor acquisition data, and front and rear nitrogen oxide sensor acquisition data, etc.

[0039] Specifically, it is determined whether the ECU power-on initialization is completed according to the ECU power-on initial data; and, it is determined whether the vehicle speed data is within the preset vehicle speed access upper and lower limit range, so as to determine whether the vehicle speed is normal; and, it is determined whether the engine speed is abnormal according to the engine speed data, specifically, it can be determined whether the engine speed is within the preset engine speed access upper and lower limit range; and, it is determined whether the gear function is normal according to the gear signal; and, it is determined whether the throttle function is normal according to the throttle signal; and, it is determined whether the atmospheric pressure signal is within the preset atmospheric pressure access upper and lower limit range; and, whether the data collected by the temperature sensor is within the preset temperature access upper and lower limit range and whether the temperature sensor function is normal; and, whether the circulating fuel supply amount is within the preset fuel supply amount access upper and lower limit range; and, it is determined whether the post-processor temperature sensor is functioning normally according to the data collected by the post-processor temperature sensor; and, it is determined whether the front and rear nitrogen oxide sensors are functioning normally according to the data collected by the front and rear nitrogen oxide sensors.

[0040] When the above functions are all normal and the data all meet the judgment conditions of the corresponding access upper and lower limit range, it can be determined that the current common rail diesel vehicle meets the original emission correction function start condition, and then the vehicle driving process data of the current common rail diesel vehicle within a preset time period is obtained.

[0041] The above technical solution realizes personalized processing of function control activation by allowing users such as drivers to select whether to activate the original emission correction function of the vehicle. After the user determines to activate it, it first checks whether the vehicle meets the activation conditions, and then conducts detection of special road conditions when the activation conditions are met, improving the safety of the function start process.

[0042] Among them, the vehicle driving process data may include atmospheric pressure data, engine instantaneous fuel amount data, throttle data, and SCR (Selective Catalytic Reduction) temperature data.

[0043] It is determined whether the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment conditions according to the vehicle driving process data. Among them, the driving condition judgment conditions are used to determine whether the current vehicle driving condition is a road driving condition with continuous uphill and downhill within a short time. If the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment conditions, it can be determined that engine emission correction control is performed on the current common rail diesel vehicle; if the vehicle driving condition of the current common rail diesel vehicle does not meet the preset driving condition judgment conditions, there is no need to perform engine emission correction control on the current common rail diesel vehicle within the current time period.

[0044] In an alternative embodiment, if it is determined that the vehicle driving condition of the current common rail diesel vehicle satisfies the preset driving condition judgment condition according to the vehicle driving process data, the after-treatment temperature, engine speed, and engine fuel injection volume of the current common rail diesel vehicle are obtained, including: determining the atmospheric pressure change amount, engine instantaneous fuel injection volume change amount, throttle change amount, and SCR temperature change amount according to the atmospheric pressure data, engine instantaneous fuel injection volume data, throttle data, and SCR temperature data within a preset time period; if the atmospheric pressure change amount satisfies the preset atmospheric pressure change judgment condition, the engine instantaneous fuel injection volume change amount satisfies the preset engine instantaneous fuel injection volume change judgment condition, the throttle change amount satisfies the preset throttle change judgment condition, and the SCR temperature change amount satisfies the preset SCR temperature change judgment condition, then the after-treatment temperature, engine speed, and engine fuel injection volume of the current common rail diesel vehicle are obtained.

[0045] Among them, the preset time period can be 1 s. The atmospheric pressure change amount can be determined by the data difference of the atmospheric pressure data within the preset time period. For example, the atmospheric pressure data at time T1 is P1, and the atmospheric pressure data at time T2 is P2, then the atmospheric pressure change amount is P2 - P1. Among them, T1 and T2 are a preset time period. The engine instantaneous fuel injection volume change amount, throttle change amount, and SCR temperature change amount are the same, and this embodiment will not elaborate on this.

[0046] Regarding the atmospheric pressure change judgment condition, if the atmospheric pressure change amount is negative within the preset time period and satisfies the preset change range interval, for example, 1 to 5 kPa, it is determined that the atmospheric pressure change amount satisfies the preset atmospheric pressure change judgment condition. For example, the atmospheric pressure signal decreases by 2 kPa within the preset time period.

[0047] Regarding the engine instantaneous fuel injection volume change judgment condition, if the engine instantaneous fuel injection volume change amount exceeds the preset throttle change amount threshold within the preset time period, it is determined that the engine instantaneous fuel injection volume change amount satisfies the preset engine instantaneous fuel injection volume change judgment condition. For example, the throttle change amount threshold can be set to 50 mg.

[0048] Regarding the throttle change judgment condition, if the throttle change amount exceeds the preset throttle change amount threshold within the preset time period, it is determined that the throttle change amount satisfies the preset throttle change judgment condition. For example, the throttle change amount threshold can be set to 50%.

[0049] Regarding the SCR temperature change judgment condition, if the SCR temperature change amount exceeds the preset temperature change amount threshold within the preset time period, it is determined that the SCR temperature change amount satisfies the preset SCR temperature change judgment condition. Among them, the temperature change rate threshold can be set to 5°.

[0050] When all the above judgment conditions are met, it can be considered that the current common-rail diesel vehicle enters a special working condition, such as driving on a continuous uphill and downhill road, and then the engine emission correction control can be carried out.

[0051] The above technical solution determines the changes in atmospheric pressure, instantaneous engine fuel quantity, throttle, and SCR temperature, and comprehensively judges the vehicle driving condition based on the foregoing changes, improving the comprehensiveness of the judgment on entering a special road, thereby improving the accuracy of the judgment result on entering a special road, and further improving the determination accuracy of whether to perform engine emission correction control on the vehicle.

[0052] When it is determined according to the vehicle driving process data that the vehicle driving condition of the current common-rail diesel vehicle meets the preset driving condition judgment conditions, it is determined to perform correction control on the engine emissions, and relevant data required for performing engine emission correction control is obtained, including the current after-treatment temperature, engine speed, and engine cycle fuel quantity of the current common-rail diesel vehicle. According to the after-treatment temperature, engine speed, and engine cycle fuel quantity, the rail pressure correction output value and injection timing correction output value are determined.

[0053] It should be noted that without considering any driving condition during the vehicle driving process, the engine emissions are controlled based on the preset reference rail pressure value and injection timing, and the reference rail pressure value and injection timing are fixed on any road. However, in the present invention, in order to effectively suppress the peak value of nitrogen oxide emissions under special working conditions, the method of correcting the reference rail pressure value and injection timing is adopted to effectively suppress the emissions of the common-rail diesel engine.

[0054] In an alternative embodiment, determining the rail pressure correction output value and injection timing correction output value according to the after-treatment temperature, engine speed, and engine cycle fuel quantity includes: determining the rail pressure correction coefficient and fuel injection timing correction coefficient according to the after-treatment temperature; determining the rail pressure correction value and fuel injection timing correction value according to the engine speed and engine cycle fuel quantity; determining the rail pressure correction output value according to the rail pressure correction coefficient and the rail pressure correction value; and determining the injection timing correction output value according to the fuel injection timing correction coefficient and the fuel injection timing correction value.

[0055] Specifically, according to the after-treatment temperature, based on the preset mapping relationship table between temperature and rail pressure correction coefficient, the rail pressure correction coefficient is determined; according to the after-treatment temperature, based on the preset mapping relationship table between temperature and timing correction coefficient, the fuel injection timing correction coefficient is determined.

[0056] Among them, the temperature and rail pressure correction coefficient mapping relationship table is a curve chart storing the mapping relationship between different post-processor temperatures and rail pressure correction coefficients. Among them, the abscissa of the curve chart is the post-processor temperature, and the ordinate is the rail pressure correction coefficient. This temperature and rail pressure correction coefficient mapping relationship table is pre-created by relevant technical personnel.

[0057] Among them, the temperature and time correction coefficient mapping relationship table is a curve chart storing the mapping relationship between different post-processor temperatures and fuel injection time correction coefficients. Among them, the abscissa of the curve chart is the post-processor temperature, and the ordinate is the fuel injection time correction coefficient. This temperature and time correction coefficient mapping relationship table is pre-created by relevant technical personnel.

[0058] Specifically, according to the engine speed and the engine cycle fuel quantity, based on the preset mapping relationship table of engine speed and fuel quantity and rail pressure correction value, determine the rail pressure correction value; according to the engine speed and the engine cycle fuel quantity, based on the preset mapping relationship table of engine speed and fuel quantity and time correction value, determine the fuel injection time correction value.

[0059] Among them, the mapping relationship table of engine speed and fuel quantity and rail pressure correction value is a three-dimensional curve chart storing the mapping relationship between different engine speeds, engine cycle fuel quantities and rail pressure correction values; among them, the X-axis of the curve chart is the engine speed, the Y-axis is the engine cycle fuel quantity, and the Z-axis is the rail pressure correction value. This mapping relationship table of engine speed and fuel quantity and rail pressure correction value is pre-created by relevant technical personnel.

[0060] Among them, the mapping relationship table of engine speed and fuel quantity and time correction value is a three-dimensional curve chart storing the mapping relationship between different engine speeds, engine cycle fuel quantities and fuel injection time correction values; among them, the X-axis of the curve chart is the engine speed, the Y-axis is the engine cycle fuel quantity, and the Z-axis is the fuel injection time correction value. This mapping relationship table of engine speed and fuel quantity and time correction value is pre-created by relevant technical personnel.

[0061] According to the rail pressure correction coefficient and the rail pressure correction value, determine the rail pressure correction output value, and according to the fuel injection time correction coefficient and the fuel injection time correction value, determine the fuel injection time correction output value.

[0062] Optionally, determining the rail pressure correction output value according to the rail pressure correction coefficient and the rail pressure correction value includes: obtaining the rail pressure reference output value of the current common rail diesel vehicle; according to the rail pressure reference output value, the rail pressure correction coefficient and the rail pressure correction value, determine the rail pressure correction output value.

[0063] Among them, the rail pressure reference output value of the current common rail diesel vehicle is the original rail pressure reference value of the vehicle, which can be directly obtained, that is, the engine emissions are controlled by this rail pressure reference output value at any time in the prior art.

[0064] Specifically, the rail pressure correction output value P RAIL is determined as follows:

[0065] P RAIL = P RAIL_0 + P RAIL_Cor * Fac RAIL_Cor ;

[0066] Wherein, P RAIL_0 is the rail pressure reference output value of the vehicle; P RAIL_Cor is the rail pressure correction value; is the rail pressure correction coefficient.

[0067] Optionally, according to the fuel injection timing correction coefficient and the fuel injection timing correction value, determine the fuel injection timing correction output value, including: obtaining the fuel injection timing reference output value of the current common rail diesel vehicle; determining the fuel injection timing correction output value according to the fuel injection timing reference output value, the fuel injection timing correction coefficient and the fuel injection timing correction value.

[0068] Wherein, the fuel injection timing reference output value of the current common rail diesel vehicle is the original fuel injection timing reference value of the vehicle, which can be directly obtained, that is, the engine emissions are controlled by this fuel injection timing reference output value at any time in the prior art.

[0069] Specifically, the determination method of the fuel injection timing reference output value ANG MAIN is as follows:

[0070] ANG MAIN = ANG MAIN_0 + ANG MAIN_Cor * Fac MAIN_Cor ;

[0071] Wherein, ANG MAIN_0 is the fuel injection timing reference output value of the vehicle; ANG MAIN_Cor is the fuel injection timing correction value; Fac MAIN_Cor is the fuel injection timing correction coefficient.

[0072] The above technical solution determines the rail pressure correction output value by combining the rail pressure correction coefficient and the rail pressure correction value, and determines the fuel injection timing correction output value by combining the fuel injection timing correction coefficient and the fuel injection timing correction value, realizing the accurate correction of the rail pressure value and the accurate correction of the fuel injection timing, comprehensively considering the variation characteristics of the post-processor temperature, engine speed and engine cycle fuel quantity under special working conditions, improving the accuracy of the actual output of the fuel injection timing and the rail pressure, and thus realizing the effective suppression of emissions under special working conditions.

[0073] Based on the rail pressure correction output value and the injection timing correction output value, control and correct the engine emissions of the current common rail diesel vehicle. That is, output the rail pressure correction output value and the injection timing correction output value to effectively suppress the engine emissions under special working conditions.

[0074] When the technical solution of the embodiment of the present invention determines that the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment condition, obtain the temperature of the post-treatment device, the engine speed, and the engine fuel injection cycle amount of the current common rail diesel vehicle, and determine the rail pressure correction output value and the injection timing correction output value according to the temperature of the post-treatment device, the engine speed, and the engine fuel injection cycle amount. Based on the rail pressure correction output value and the injection timing correction output value, control and correct the engine emissions of the current common rail diesel vehicle. The above technical solution determines the rail pressure correction output value and the injection timing correction output value through the characteristics of the temperature of the post-treatment device, the engine speed, and the engine fuel injection cycle amount when the vehicle enters a special working condition, realizing accurate correction of the original emissions of the common rail diesel engine under special working conditions, thereby effectively controlling the emissions of the common rail diesel engine under special working conditions, and at the same time achieving the effect of reducing the urea consumption, and further saving the consumption of resources.

[0075] Embodiment 2

[0076] Figure 2 It is a flowchart of a method for correcting and controlling the emissions of a common rail diesel engine provided by Embodiment 2 of the present invention. Based on the above embodiment, this embodiment provides a preferred example.

[0077] As Figure 2 shown, the method includes the following specific steps:

[0078] S21. If a raw emission correction function activation instruction initiated by a driver user is received, obtain the vehicle performance data of the current common rail diesel vehicle.

[0079] S22. Judge whether the current common rail diesel vehicle meets the raw emission correction function start condition according to the vehicle performance data. If so, execute S23; if not, do not enter the engine emission correction process.

[0080] Judge whether the ECU power-on initialization is completed according to the ECU power-on initial data; and, judge whether the vehicle speed data is within the preset upper and lower limits of the vehicle speed access range, so as to judge whether the vehicle speed is normal; and, judge whether the engine speed is abnormal according to the engine speed data, specifically, it can be judged whether the engine speed is within the preset upper and lower limits of the engine speed access range; and, judge whether the gear function is normal according to the gear signal; and, judge whether the throttle function is normal according to the throttle signal; and, judge whether the atmospheric pressure signal is within the preset upper and lower limits of the atmospheric pressure access range; and, whether the data collected by the temperature sensor is within the preset upper and lower limits of the temperature access range, and whether the temperature sensor function is normal; and, whether the circulating fuel supply amount is within the preset upper and lower limits of the fuel supply amount access range; and, judge whether the post-processor temperature sensor is functioning normally according to the data collected by the post-processor temperature sensor; and, judge whether the front and rear nitrogen oxide sensors are functioning normally according to the data collected by the front and rear nitrogen oxide sensors.

[0081] When the above functions are all normal and the data all meet the judgment conditions of the corresponding upper and lower limits of the access range, it can be determined that the current common rail diesel vehicle meets the original emission correction function start condition, and then obtain the vehicle driving process data of the current common rail diesel vehicle within the preset time period.

[0082] S23. Obtain the vehicle driving process data of the current common rail diesel vehicle within the preset time period.

[0083] Among them, the vehicle driving process data may include atmospheric pressure data, engine instantaneous fuel quantity data, throttle data, and SCR temperature data.

[0084] S24. According to the vehicle driving process data, judge whether the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment conditions. If so, execute S25; if not, do not enter the engine emission correction process.

[0085] Judge whether the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment conditions according to the vehicle driving process data. Among them, the driving condition judgment conditions are used to judge whether the current driving condition of the vehicle is a road driving condition with continuous uphill and downhill in a short period of time. If the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment conditions, it can be determined to perform engine emission correction control on the current common rail diesel vehicle; if the vehicle driving condition of the current common rail diesel vehicle does not meet the preset driving condition judgment conditions, there is no need to perform engine emission correction control on the current common rail diesel vehicle within the current time period.

[0086] S25. Obtain the post-processor temperature, engine speed, engine circulating fuel quantity, rail pressure reference output value, and injection timing reference output value of the current common rail diesel vehicle.

[0087] S26A. Determine the rail pressure correction coefficient and the fuel injection timing correction coefficient according to the after-treatment temperature.

[0088] Specifically, according to the after-treatment temperature, determine the rail pressure correction coefficient based on a preset mapping relation table between temperature and rail pressure correction coefficient; according to the after-treatment temperature, determine the fuel injection timing correction coefficient based on a preset mapping relation table between temperature and timing correction coefficient.

[0089] Among them, the mapping relation table between temperature and rail pressure correction coefficient is a curve chart storing the mapping relation between different after-treatment temperatures and rail pressure correction coefficients. Among them, the abscissa of the curve chart is the after-treatment temperature, and the ordinate is the rail pressure correction coefficient. This mapping relation table between temperature and rail pressure correction coefficient is pre-created by relevant technical personnel.

[0090] Among them, the mapping relation table between temperature and timing correction coefficient is a curve chart storing the mapping relation between different after-treatment temperatures and fuel injection timing correction coefficients. Among them, the abscissa of the curve chart is the after-treatment temperature, and the ordinate is the fuel injection timing correction coefficient. This mapping relation table between temperature and timing correction coefficient is pre-created by relevant technical personnel.

[0091] S26B. Determine the rail pressure correction value and the fuel injection timing correction value according to the engine speed and the engine cycle fuel quantity.

[0092] Specifically, according to the engine speed and the engine cycle fuel quantity, determine the rail pressure correction value based on a preset mapping relation table between engine speed, fuel quantity and rail pressure correction value; according to the engine speed and the engine cycle fuel quantity, determine the fuel injection timing correction value based on a preset mapping relation table between engine speed, fuel quantity and timing correction value.

[0093] Among them, the mapping relation table between engine speed, fuel quantity and rail pressure correction value is a three-dimensional curve chart storing the mapping relation between different engine speeds, engine cycle fuel quantities and rail pressure correction values; among them, the X-axis of the curve chart is the engine speed, the Y-axis is the engine cycle fuel quantity, and the Z-axis is the rail pressure correction value. This mapping relation table between engine speed, fuel quantity and rail pressure correction value is pre-created by relevant technical personnel.

[0094] Among them, the mapping relation table between engine speed, fuel quantity and timing correction value is a three-dimensional curve chart storing the mapping relation between different engine speeds, engine cycle fuel quantities and fuel injection timing correction values; among them, the X-axis of the curve chart is the engine speed, the Y-axis is the engine cycle fuel quantity, and the Z-axis is the fuel injection timing correction value. This mapping relation table between engine speed, fuel quantity and timing correction value is pre-created by relevant technical personnel.

[0095] S27A. Determine the rail pressure correction output value according to the rail pressure correction coefficient and the rail pressure correction value.

[0096] Specifically, the rail pressure correction output value P RAIL is determined as follows:

[0097] P RAIL = P RAIL_0 + P RAIL_Cor * Fac RAIL_Cor ;

[0098] wherein, P RAIL_0 is the rail pressure reference output value of the vehicle; P RAIL_Cor is the rail pressure correction value; Fac is the rail pressure correction coefficient.

[0099] S27B. Determine the injection timing correction output value according to the fuel injection timing correction coefficient and the fuel injection timing correction value.

[0100] Specifically, the determination method of the injection timing reference output value ANG MAIN is as follows:

[0101] ANG MAIN = ANG MAIN_0 + ANG MAIN_Cor * Fac MAIN_Cor ;

[0102] wherein, ANG MAIN_0 is the injection timing reference output value of the vehicle; ANG MAIN_Cor is the fuel injection timing correction value; Fac MAIN_Cor is the fuel injection timing correction coefficient.

[0103] S28. Control and correct the engine emissions of the current common rail diesel vehicle based on the rail pressure correction output value and the injection timing correction output value.

[0104] From the results of the above embodiments, it can be seen that the engine emissions correction control method of this embodiment has a strong control effect on the peak value of nitrogen oxide emissions at the initial stage of uphill acceleration for vehicles in special working conditions such as mountainous areas. It solves the problem that when the processor temperature drops after the vehicle runs in a long downhill working condition and even drops below the urea injection start temperature, it can avoid a large amount of nitrogen oxide emissions in the exhaust gas during the subsequent uphill large throttle working condition by reducing the original nitrogen oxides. The emission reduction measures for the original engine nitrogen oxides based on working condition identification can optimize the nitrogen oxide emissions under normal working conditions of the whole vehicle and achieve the effect of saving urea consumption.

[0105] Embodiment III

[0106] Figure 3Schematic diagram of a structure of a common rail diesel engine emission correction control device provided in Embodiment 3 of the present invention. A common rail diesel engine emission correction control device provided in the embodiments of the present invention can be applicable to the situation where a diesel vehicle is driving in a mountainous area and is in a continuous uphill and downhill driving condition, and performs emission correction control on a common rail diesel engine. The common rail diesel engine emission correction control device can be implemented in the form of hardware and / or software, such as Figure 3 As shown, the device specifically includes: a driving process data acquisition module 301, a condition judgment module 302, a correction output value determination module 303, and an emission control module 304. Among them,

[0107] The driving process data acquisition module 301 is used to acquire the vehicle driving process data of the current common rail diesel vehicle within a preset time period;

[0108] The condition judgment module 302 is used to, if it is determined according to the vehicle driving process data that the vehicle driving condition of the current common rail diesel vehicle meets a preset driving condition judgment condition, acquire the temperature of the post-processor, the engine speed, and the engine cycle fuel quantity of the current common rail diesel vehicle;

[0109] The correction output value determination module 303 is used to determine a rail pressure correction output value and an injection timing correction output value according to the temperature of the post-processor, the engine speed, and the engine cycle fuel quantity;

[0110] The emission control module 304 is used to control and correct the engine emissions of the current common rail diesel vehicle based on the rail pressure correction output value and the injection timing correction output value.

[0111] The technical solution of the embodiment of the present invention, when it is determined that the vehicle driving condition of the current common rail diesel vehicle meets a preset driving condition judgment condition, acquires the temperature of the post-processor, the engine speed, and the engine cycle fuel quantity of the current common rail diesel vehicle, and determines a rail pressure correction output value and an injection timing correction output value according to the temperature of the post-processor, the engine speed, and the engine cycle fuel quantity, and controls and corrects the engine emissions of the current common rail diesel vehicle based on the rail pressure correction output value and the injection timing correction output value. The above technical solution determines the rail pressure correction output value and the injection timing correction output value through the characteristics of the temperature of the post-processor, the engine speed, and the engine cycle fuel quantity when the vehicle enters a special working condition, realizes the accurate correction of the original engine emissions of the common rail diesel engine under special working conditions, thereby realizing the effective control of the emissions of the common rail diesel engine under special working conditions, and at the same time achieving the effect of reducing the urea consumption, and further saving the resource consumption.

[0112] Optionally, the correction output value determination module 303 includes:

[0113] A correction coefficient determination unit, configured to determine a rail pressure correction coefficient and a fuel injection timing correction coefficient according to the post-processor temperature;

[0114] A correction value determination unit, configured to determine a rail pressure correction value and a fuel injection timing correction value according to the engine speed and the engine cyclic fuel quantity;

[0115] A rail pressure output value determination unit, configured to determine a rail pressure correction output value according to the rail pressure correction coefficient and the rail pressure correction value; and,

[0116] A timing output value determination unit, configured to determine an injection timing correction output value according to the fuel injection timing correction coefficient and the fuel injection timing correction value.

[0117] Optionally, the rail pressure output value determination unit is specifically configured to:

[0118] Obtain a rail pressure reference output value of the current common rail diesel vehicle;

[0119] Determine a rail pressure correction output value according to the rail pressure reference output value, the rail pressure correction coefficient, and the rail pressure correction value.

[0120] Optionally, the timing output value determination unit is specifically configured to:

[0121] Obtain an injection timing reference output value of the current common rail diesel vehicle;

[0122] Determine an injection timing correction output value according to the injection timing reference output value, the fuel injection timing correction coefficient, and the fuel injection timing correction value.

[0123] Optionally, the device further includes:

[0124] A vehicle performance data acquisition module, configured to acquire vehicle performance data of the current common rail diesel vehicle in response to an original emission correction function activation instruction before acquiring vehicle driving process data of the current common rail diesel vehicle within a preset time period;

[0125] A function start judgment module, configured to execute acquiring the vehicle driving process data of the current common rail diesel vehicle within a preset time period if it is determined according to the vehicle performance data that the current common rail diesel vehicle meets the original emission correction function start condition.

[0126] Optionally, the vehicle driving process data includes: atmospheric pressure data, engine instantaneous fuel quantity data, throttle data, and selective catalytic reduction (SCR) temperature data.

[0127] Optionally, the condition judgment module 302 is specifically configured to:

[0128] Determine the atmospheric pressure change amount, the engine instantaneous fuel quantity change amount, the throttle change amount, and the SCR temperature change amount based on the atmospheric pressure data, the engine instantaneous fuel quantity data, the throttle data, and the SCR temperature data within the preset time period.

[0129] If the atmospheric pressure change amount meets the preset atmospheric pressure change judgment condition, the engine instantaneous fuel quantity change amount meets the preset engine instantaneous fuel quantity change judgment condition, the throttle change amount meets the preset throttle change judgment condition, and the SCR temperature change amount meets the preset SCR temperature change judgment condition, then obtain the after-treatment temperature, the engine speed, and the engine cycle fuel quantity of the current common-rail diesel vehicle.

[0130] The common-rail diesel engine emission correction control device provided by the embodiments of the present invention can execute the common-rail diesel engine emission correction control method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0131] Embodiment Four

[0132] Figure 4 FIG. shows a schematic structural diagram of an electronic device 40 that can be used to implement the embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0133] As Figure 4 shown, the electronic device 40 includes at least one processor 41, and a memory communicatively connected to at least one processor 41, such as a read-only memory (ROM) 42, a random access memory (RAM) 43, etc. Among them, the memory stores a computer program executable by at least one processor. The processor 41 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 42 or the computer program loaded from the storage unit 48 into the random access memory (RAM) 43. In the RAM 43, various programs and data required for the operation of the electronic device 40 can also be stored. The processor 41, the ROM 42, and the RAM 43 are connected to each other through a bus 44. The input / output (I / O) interface 45 is also connected to the bus 44.

[0134] Multiple components in the electronic device 40 are connected to the I / O interface 45, including: an input unit 46, such as a keyboard, a mouse, etc.; an output unit 47, such as various types of displays, speakers, etc.; a storage unit 48, such as a magnetic disk, an optical disc, etc.; and a communication unit 49, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0135] The processor 41 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 41 include but are not limited to a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 41 executes the various methods and processes described above, such as the common rail diesel engine emissions correction control method.

[0136] In some embodiments, the common rail diesel engine emissions correction control method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as the storage unit 48. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 40 via the ROM 42 and / or the communication unit 49. When the computer program is loaded into the RAM 43 and executed by the processor 41, one or more steps of the common rail diesel engine emissions correction control method described above can be executed. Alternatively, in other embodiments, the processor 41 can be configured to execute the common rail diesel engine emissions correction control method by any other suitable means (e.g., by means of firmware).

[0137] The various embodiments of the systems and technologies described above in this document can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special or general programmable processor, and can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0138] A computer program for implementing the method of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, a special purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer programs can be executed entirely on the machine, partially on the machine, as a stand-alone software package partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0139] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0140] In order to provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0141] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0142] A computing system can include a client and a server. The client and the server are generally remote from each other and typically interact through a communication network. The client-server relationship is created by computer programs running on respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, solving the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0143] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0144] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for correcting the emissions control of a common rail diesel engine, characterized in that, Including: Obtaining the vehicle driving process data of the current common rail diesel vehicle within a preset time period; If it is determined according to the vehicle driving process data that the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment condition, then obtaining the after-treatment temperature, engine speed and engine fuel injection quantity of the current common rail diesel vehicle; Determining a rail pressure correction output value and an injection timing correction output value according to the after-treatment temperature, engine speed and engine fuel injection quantity; Based on the rail pressure correction output value and the injection timing correction output value, controlling and correcting the engine emissions of the current common rail diesel vehicle.

2. The method according to claim 1, wherein The determining a rail pressure correction output value and an injection timing correction output value according to the after-treatment temperature, engine speed and engine fuel injection quantity includes: Determining a rail pressure correction coefficient and a fuel injection timing correction coefficient according to the after-treatment temperature; Determining a rail pressure correction value and a fuel injection timing correction value according to the engine speed and the engine fuel injection quantity; Determining a rail pressure correction output value according to the rail pressure correction coefficient and the rail pressure correction value; and Determining an injection timing correction output value according to the fuel injection timing correction coefficient and the fuel injection timing correction value.

3. The method according to claim 2, wherein The determining a rail pressure correction output value according to the rail pressure correction coefficient and the rail pressure correction value includes: Obtaining the rail pressure reference output value of the current common rail diesel vehicle; Determining a rail pressure correction output value according to the rail pressure reference output value, the rail pressure correction coefficient and the rail pressure correction value.

4. The method according to claim 2, characterized in that The determining an injection timing correction output value according to the fuel injection timing correction coefficient and the fuel injection timing correction value includes: Obtaining the injection timing reference output value of the current common rail diesel vehicle; Determining an injection timing correction output value according to the injection timing reference output value, the fuel injection timing correction coefficient and the fuel injection timing correction value.

5. The method according to claim 1, wherein Before the obtaining the vehicle driving process data of the current common rail diesel vehicle within a preset time period, it further includes: In response to an original emission correction function activation instruction, obtaining the vehicle performance data of the current common rail diesel vehicle; If it is determined according to the vehicle performance data that the current common rail diesel vehicle meets the original emission correction function start condition, then executing the obtaining the vehicle driving process data of the current common rail diesel vehicle within a preset time period.

6. The method according to claim 1, wherein The vehicle driving process data includes: atmospheric pressure data, engine instantaneous fuel quantity data, throttle data and selective catalytic reduction (SCR) temperature data.

7. The method according to claim 6, wherein The if it is determined according to the vehicle driving process data that the vehicle driving condition of the current common rail diesel vehicle meets the preset driving condition judgment condition, then obtaining the after-treatment temperature, engine speed and engine fuel injection quantity of the current common rail diesel vehicle includes: Determining an atmospheric pressure change amount, an engine instantaneous fuel quantity change amount, a throttle change amount and an SCR temperature change amount according to the atmospheric pressure data, the engine instantaneous fuel quantity data, the throttle data and the SCR temperature data within the preset time period; If the change amount of the atmospheric pressure satisfies the preset atmospheric pressure change judgment condition, and the change amount of the instantaneous fuel quantity of the engine satisfies the preset instantaneous fuel quantity change judgment condition of the engine, and the change amount of the throttle satisfies the preset throttle change judgment condition, and the change amount of the SCR temperature satisfies the preset SCR temperature change judgment condition, then obtain the after-treatment temperature, engine speed, and engine cycle fuel quantity of the current common rail diesel vehicle.

8. A common rail diesel engine emission correction control device, characterized in that, Including: A driving process data acquisition module, configured to acquire vehicle driving process data of the current common rail diesel vehicle within a preset time period; A condition judgment module, configured to obtain the after-treatment temperature, engine speed, and engine cycle fuel quantity of the current common rail diesel vehicle if it is determined according to the vehicle driving process data that the vehicle driving condition of the current common rail diesel vehicle satisfies the preset driving condition judgment condition; A corrected output value determination module, configured to determine a rail pressure corrected output value and an injection timing corrected output value according to the after-treatment temperature, engine speed, and engine cycle fuel quantity; An emission control module, configured to control and correct the engine emissions of the current common rail diesel vehicle based on the rail pressure corrected output value and the injection timing corrected output value.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the common rail diesel engine emission correction control method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, and the computer instructions are used to implement the common rail diesel engine emission correction control method according to any one of claims 1-7 when executed by a processor.

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