A method and device for detecting a PN, and an electronic device
By detecting and correcting the PN content value after treatment by the oil-gas separator and DPF, and selecting an appropriate treatment method based on the judgment parameters, the problem of low PN treatment efficiency in engine exhaust was solved, achieving regulatory compliance of PN content value and reduction of exhaust gas.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WEICHAI POWER CO LTD
- Filing Date
- 2022-08-31
- Publication Date
- 2026-05-29
Smart Images
Figure CN115422491B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of exhaust gas treatment technology, and in particular to a method, apparatus, and electronic device for detecting and treating PN. Background Technology
[0002] The current China VI emission standard adds monitoring of PN (particle number), requiring engines to meet regulatory requirements for PN. PN refers to the total number of particles larger than 23nm in exhaust gas after removing volatile substances. Currently, PN generated by engines is discharged through two paths: one is discharged from the engine exhaust pipe, which is processed by the DPF (Diesel Particulate Filter) before being released into the atmosphere; the second path is through the engine's oil-gas separator, where the exhaust gas also contains PN. Currently, the ECU (Electronic Control Unit) lacks a mechanism to handle PN. Summary of the Invention
[0003] The purpose of this application is to provide a method, apparatus, and electronic device for detecting and processing PN (PN). This is used to select the appropriate PN processing method based on the real-time PN content, thereby improving PN processing efficiency.
[0004] In a first aspect, embodiments of this application provide a method for detecting and processing a PN, the method comprising:
[0005] Determine the first PN content value in the exhaust gas from the oil-gas separator outlet and the second PN content value in the exhaust gas after DPF treatment;
[0006] Based on the first content value and the second content value, the determination parameters are determined;
[0007] If the determination parameter meets the first preset condition, the exhaust gas of the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas at the outlet of the oil-gas separator.
[0008] If the determination parameter does not meet the first preset condition, the exhaust gas from the oil-gas separator is discharged.
[0009] This application determines the judgment parameters through a first content value and a second content value. When the judgment parameters do not meet the first preset condition, the oil-gas separator can directly discharge into the atmosphere, reducing the pollution of the turbocharger and intake pipe by exhaust gas. When the judgment parameters meet the first preset condition, the leaking oil-gas separator needs to re-enter the engine through the intake pipe for DPF treatment, which solves the problem of PN content value not meeting the regulations, improves the efficiency of PN treatment, and allows for the selection of an appropriate PN treatment method based on the real-time PN content value.
[0010] In some possible embodiments, the uncorrected content of PN in the exhaust gas at the oil-gas separator outlet is determined based on the current engine speed and engine oil quantity;
[0011] Based on the pre-set correspondence between the PN content value of the oil-gas separator and the correction coefficient, the first correction coefficient corresponding to the uncorrected content value is determined;
[0012] The uncorrected content value is corrected according to the first correction coefficient to obtain the first content value.
[0013] In some possible embodiments, the original PN value before DPF treatment is determined based on the current engine speed and engine oil level.
[0014] Based on the correspondence between DPF temperature and the basic conversion efficiency of DPF to the original PN, determine the basic conversion efficiency value corresponding to the current DPF temperature;
[0015] Based on the original PN value and the basic conversion efficiency value, the second PN content value in the exhaust gas after DPF treatment is determined.
[0016] In some possible embodiments, a second correction factor corresponding to the current original PN value is determined based on a pre-set correspondence between the original PN value and the correction factor.
[0017] The original PN value is corrected according to the second correction coefficient to obtain the corrected original PN value;
[0018] Determining the second PN content value in the exhaust gas after DPF treatment includes:
[0019] The second PN content value in the exhaust gas after DPF treatment is determined based on the corrected original PN value and the basic PN conversion efficiency.
[0020] In some possible embodiments, a third correction factor corresponding to the current DPF carbon loading is determined based on a pre-set correspondence between DPF carbon loading and carbon loading correction factor.
[0021] Based on the pre-set correspondence between vehicle speed and vehicle speed correction coefficient, determine the fourth correction coefficient corresponding to the current vehicle speed;
[0022] Based on the pre-set correspondence between DPF aging time and aging time correction coefficient, determine the fifth correction coefficient corresponding to the current DPF aging time;
[0023] The PN conversion efficiency value is determined based on the PN basic conversion efficiency value, the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient.
[0024] Determining the second PN content value in the exhaust gas after DPF treatment includes:
[0025] The second PN content value in the exhaust gas after DPF treatment is determined based on the corrected original PN value and the PN conversion efficiency value.
[0026] In some possible embodiments, the determination parameter is determined to satisfy a first preset condition in the following ways:
[0027] If the determination parameter is greater than a preset threshold, then the first preset condition is determined to be met; if the determination parameter is not greater than the preset threshold, then the first preset condition is determined not to be met.
[0028] Secondly, embodiments of this application provide a detection and processing apparatus for a PN, the apparatus comprising:
[0029] The content value determination module is used to determine the first PN content value in the exhaust gas from the oil-gas separator outlet and the second PN content value in the exhaust gas after DPF treatment.
[0030] The determination parameter module is used to determine the determination parameters based on the first content value and the second content value;
[0031] The first processing module is used to connect the exhaust gas of the oil-gas separator to the intake pipe and perform DPF treatment on the exhaust gas at the outlet of the oil-gas separator if the determination parameter meets the first preset condition.
[0032] The second processing module is used to discharge the exhaust gas from the oil-gas separator if the determination parameter does not meet the first preset condition.
[0033] Thirdly, embodiments of this application provide an electronic device, including at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the PN detection processing method provided in the first aspect above.
[0034] In some possible embodiments, the electronic device further includes: a first switch installed on the outlet pipe of the oil-gas separator leading to the atmosphere, and a second switch installed on the outlet pipe of the intake pipe of the oil-gas separator leading to the turbocharger; the processor is specifically used to execute:
[0035] When the vehicle starts running, if the determination parameter does not meet the first preset condition, the first switch is turned on and the second switch is turned off to discharge the exhaust gas from the oil-gas separator.
[0036] If the determination parameters meet the first preset conditions, the first switch is turned off and the second switch is turned on, so that the exhaust gas of the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas of the oil-gas separator outlet.
[0037] Fourthly, embodiments of this application provide a computer storage medium storing a computer program for causing a computer to execute the method for training the temperature prediction model provided in the first aspect.
[0038] This application determines the uncorrected PN value (including the uncorrected PN content in the exhaust gas from the oil separator outlet and the original PN value before DPF treatment) by engine speed and engine oil quantity. The PN conversion efficiency is determined by DPF temperature, DPF carbon load, vehicle speed, and DPF aging time. When the parameters do not exceed preset thresholds, the oil separator can directly discharge into the atmosphere, reducing exhaust gas pollution to the turbocharger and intake manifold. When the parameters exceed preset thresholds, leaking air from the oil separator needs to re-enter the engine through the intake manifold for DPF treatment, thus resolving the issue of PN content not meeting regulations and improving the overall efficiency of PN content treatment.
[0039] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description
[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0041] Figure 1 This is a circuit diagram of a PN detection and processing apparatus according to an embodiment of this application;
[0042] Figure 2 This is a schematic flowchart of a PN detection and processing method according to an embodiment of this application;
[0043] Figure 3 This is a schematic diagram of a specific process for detecting and processing PN according to an embodiment of this application, where the determination parameter is the tail PN value;
[0044] Figure 4 This is a schematic diagram of a specific process for detecting and processing PN according to an embodiment of this application, where the determination parameter is the specific emission value;
[0045] Figure 5 This is a schematic diagram of the structure of a PN detection and processing device according to an embodiment of this application;
[0046] Figure 6 This is a schematic diagram of an electronic device structure according to an embodiment of this application. Detailed Implementation
[0047] The technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.
[0048] In the description of the embodiments of this application, unless otherwise stated, the term "multiple" refers to two or more, and other quantifiers are similarly understood. The preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict.
[0049] To further illustrate the technical solutions provided in the embodiments of this application, a detailed description is provided below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiments of this application provide method operation steps as shown in the following embodiments or drawings, more or fewer operation steps may be included in the method based on conventional or non-inventive effort. For steps that do not logically have a necessary causal relationship, the execution order of these steps is not limited to the execution order provided in the embodiments of this application. In actual processing or when the control device executes the method, it may be executed sequentially or in parallel according to the method shown in the embodiments or drawings.
[0050] Given the lack of adequate processing of PN in related technologies, this application proposes a method, apparatus, and electronic equipment for detecting and processing PN, which improves the efficiency of PN processing and allows selection of an appropriate PN processing method based on the real-time PN content value.
[0051] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.
[0052] The detection and processing method of PN in the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0053] See Figure 1 This is a schematic diagram of the structure of a PN detection and processing apparatus according to an embodiment of this application.
[0054] like Figure 1 As shown, located Figure 1 The pipe before the upper left air filter is the atmospheric intake pipe. The intake air undergoes initial filtration through the air filter, then passes through the MAF (Mass Air Flow sensor), and then through the trapezoidal supercharger connected vertically. The MAF is connected to the left side of the supercharger's intake end, i.e., the pressure end. The gas pressure increases after passing through the supercharger, resulting in more gas entering the engine and increasing engine power. Next, it passes through the CAC (Charge Air Cooler). Because the temperature increases after compression by the supercharger, the CAC cools the air through air or water cooling. Then, it passes through the intake throttle valve, reducing the intake volume and increasing the internal engine temperature. After entering the engine through the intake throttle valve, the gas passes through the exhaust pipe and then through the supercharger for aftertreatment. Aftertreatment includes the DPF (Diesel Particulate Filter), DOC (Diesel Oxidation Catalyst), and SCR (Selective Catalytic Reduction). Reduction (selective catalytic reduction system), sensor 1 in the figure is used to measure the upstream temperature of DPF.
[0055] The majority of the gases inside the engine pass through the exhaust pipe and are after-treated by the turbocharger, while a small portion leaks out through the oil-gas separator. A first switch is installed on the exhaust pipe leading from the oil-gas separator to the atmosphere, and a second switch is installed on the exhaust pipe leading from the oil-gas separator to the intake pipe before the turbocharger. By controlling the opening and closing of the first and second switches, different PN treatment methods can be selected according to the actual PN content.
[0056] Figure 2 This application provides a schematic flowchart of a PN detection and processing method according to an embodiment, including:
[0057] Step 201: Determine the first PN content value in the exhaust gas from the oil-gas separator outlet and the second PN content value in the exhaust gas after DPF treatment.
[0058] Although most of the gas inside the engine enters the aftertreatment stage through the exhaust pipe and is discharged after being treated by the DPF, the first PN content value in the gas leaking out through the oil-gas separator has a significant impact on the final detection result of the PN detection process. Therefore, this application needs to determine both the first PN content value in the exhaust gas at the oil-gas separator outlet and the second PN content value in the exhaust gas after DPF treatment.
[0059] As an optional method, the first content value of PN can be determined by the following approach:
[0060] Determine the uncorrected PN content value in the exhaust gas from the oil-gas separator outlet based on the current engine speed and engine oil level.
[0061] Based on the pre-set correspondence between the PN content value of the oil-gas separator and the correction coefficient, the first correction coefficient corresponding to the uncorrected content value is determined;
[0062] The uncorrected content value is corrected according to the first correction coefficient to obtain the first content value.
[0063] Specifically, in this application, the executing entity is the ECU (Electronic Control Unit). A first table is pre-set with the PN content values in the exhaust gas at the oil-gas separator outlet corresponding to the engine speed and engine oil quantity. After the ECU monitors the current engine speed and current engine oil quantity in real time, it determines the corresponding PN content value in the exhaust gas at the oil-gas separator outlet by referring to the first table. Since the PN content value at this time has not been corrected, this application refers to the PN content value at this time as the uncorrected PN content value.
[0064] The relationship between the PN content value and the correction coefficient of the oil-gas separator can be preset. It can be, but is not limited to, a correction based on engine running time. When the vehicle runs for too long, the engine performance will change. At this time, the amount of gas leaking from the oil-gas separator will increase, and the first PN content value in the leaked gas will also increase. Based on this phenomenon, the relationship between the PN content value and the correction coefficient of the oil-gas separator can be preset. For example, one hour of vehicle operation corresponds to a correction coefficient of 1, ten hours of vehicle operation corresponds to a correction coefficient of 2, and so on.
[0065] As an optional implementation, the ECU monitors the vehicle's running time in real time and determines the first correction coefficient corresponding to the current uncorrected content value of the oil-gas separator based on the current vehicle running time.
[0066] The uncorrected content value can be corrected using the first correction factor, which can be done by multiplying the uncorrected content value by the first correction factor to obtain the first content value.
[0067] As an optional method, the second content value of PN can be determined by the following approach:
[0068] Determine the original PN value of the engine before DPF treatment based on the current engine speed and engine oil level.
[0069] Based on the correspondence between DPF temperature and the basic conversion efficiency of DPF to the original PN, determine the basic conversion efficiency value corresponding to the current DPF temperature;
[0070] Based on the original PN value and the basic conversion efficiency value, the second PN content value in the exhaust gas after DPF treatment is determined.
[0071] The relationship between DPF temperature and the basic conversion efficiency of DPF to the original PN is preset. Different DPF temperatures correspond to different basic conversion efficiencies. The corresponding basic conversion efficiency value is determined based on the real-time monitored current DPF temperature.
[0072] Specifically, a second table is pre-set with the original PN values of the engine before DPF treatment, corresponding to the engine speed and engine oil level. After the ECU monitors the current engine speed and current engine oil level in real time, it determines the corresponding original PN values before DPF treatment by referring to the second table. At this time, the original PN values are also not corrected.
[0073] As an optional implementation method, a second correction coefficient corresponding to the current original PN value is determined based on a pre-set correspondence between the original PN value and the correction coefficient.
[0074] The original PN value is corrected according to the second correction coefficient to obtain the corrected original PN value.
[0075] The original engine PN value and the correction coefficient can be pre-set. This can be based on the correction of engine running time. When the vehicle runs for a long time, the engine performance will change. At this time, the amount of gas entering the aftertreatment stage through the exhaust pipe will increase. Then, the second content value of PN in the exhaust after DPF treatment will also increase. Based on this phenomenon, the original engine PN value and the correction coefficient can be pre-set. For example, one hour of vehicle operation corresponds to a correction coefficient of 3, ten hours of vehicle operation corresponds to a correction coefficient of 4, etc.
[0076] As an optional implementation method, the ECU monitors the vehicle's running time in real time and determines the second correction coefficient corresponding to the current original PN value based on the current vehicle running time.
[0077] The original PN value can be corrected by using the second correction factor. This can be done by multiplying the original PN value by the second correction factor to obtain the corrected original PN value.
[0078] In this application, the basic conversion efficiency of the DPF to the original PN can be calibrated based on the DPF temperature and then corrected based on the DPF carbon load, vehicle speed and DPF aging time.
[0079] As an alternative implementation method:
[0080] Based on the pre-defined correspondence between DPF carbon loading and carbon loading correction coefficient, determine the third correction coefficient corresponding to the current DPF carbon loading.
[0081] Based on the pre-set correspondence between vehicle speed and vehicle speed correction coefficient, determine the fourth correction coefficient corresponding to the current vehicle speed;
[0082] Based on the pre-set correspondence between DPF aging time and aging time correction coefficient, determine the fifth correction coefficient corresponding to the current DPF aging time;
[0083] The PN conversion efficiency value is determined based on the PN basic conversion efficiency value, the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient.
[0084] Specifically, the third correction factor is determined by querying the pre-set carbon loading correction factor corresponding to the current DPF carbon loading after determining the current DPF carbon loading. In this application, the carbon loading correction factor corresponding to the current DPF carbon loading is named the third correction factor, which is used as one of the correction factors for correcting the basic conversion efficiency value of PN.
[0085] The fourth correction factor is determined by querying the vehicle speed correction factor corresponding to the pre-set vehicle speed after determining the current vehicle speed. In this application, the vehicle speed correction factor corresponding to the current vehicle speed is named the fourth correction factor, which is used as one of the correction factors for correcting the basic conversion efficiency value of PN.
[0086] The fifth correction factor is determined by querying the aging time correction factor corresponding to the pre-set DPF aging time after determining the current DPF aging time. In this application, the aging time correction factor corresponding to the current DPF aging time is named the fifth correction factor, which is used as one of the correction factors for correcting the basic conversion efficiency value of PN.
[0087] The correspondence between DPF carbon load and carbon load correction coefficient, vehicle speed and vehicle speed correction coefficient, and DPF aging time and aging time correction coefficient are preset. When the vehicle is running, the current DPF carbon load, vehicle speed, and DPF aging time are monitored in real time to determine the third, fourth, and fifth correction coefficients.
[0088] As an optional implementation, the PN conversion efficiency value is determined by multiplying the PN basic conversion efficiency value by the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient.
[0089] As an optional implementation, a second PN content value in the exhaust gas after DPF treatment is determined based on the corrected original engine PN value and the PN conversion efficiency value.
[0090] Specifically, the second content value = corrected original PN value - corrected original PN value * PN conversion efficiency value.
[0091] Step 202: Determine the judgment parameters based on the first content value and the second content value.
[0092] Specifically, this application determines the selected PN treatment method by conditionally judging the judgment parameters. The judgment parameters in this application may include, but are not limited to, the tail emission PN value and the specific emission value.
[0093] The tail-end PN value is the sum of the first content value and the second content value;
[0094] The emission ratio is the exhaust PN value divided by the engine power value; the power is generally (speed * torque / 9550).
[0095] Step 203: If the determination parameters meet the first preset conditions, the exhaust gas of the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas at the outlet of the oil-gas separator.
[0096] Step 204: If the determination parameter does not meet the first preset condition, then the exhaust gas from the oil-gas separator is discharged.
[0097] Specifically, see Figure 1 When the vehicle starts running, if the parameters are determined not to meet the first preset condition, the first switch is turned on and the second switch is turned off to discharge the exhaust gas from the oil-gas separator.
[0098] If the determination parameters meet the first preset condition, the first switch is turned off and the second switch is turned on, so that the exhaust gas of the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas of the oil-gas separator outlet.
[0099] As an optional implementation, the determination parameter is determined to meet the first preset condition in the following way: if the determination parameter is greater than a preset threshold, it is determined that the first preset condition is met; if the determination parameter is not greater than the preset threshold, it is determined that the first preset condition is not met.
[0100] Specifically, when the determination parameter is the tail row PN value, if the tail row PN value is greater than the first preset threshold, then the first preset condition is determined to be met; if the tail row PN value is not greater than the first preset threshold, then the first preset condition is determined not to be met.
[0101] When the determination parameter is a specific emission value, if the specific emission value is greater than the second preset threshold, then the first preset condition is determined to be met; if the specific emission value is not greater than the second preset threshold, then the first preset condition is determined not to be met.
[0102] The first preset threshold is a pre-set limit value for the exhaust PN. If the exhaust PN value is greater than the first preset threshold, the exhaust gas from the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas from the oil-gas separator outlet; if the exhaust PN value is not greater than the first preset threshold, the exhaust gas from the oil-gas separator is discharged.
[0103] The second preset threshold is a pre-set limit for specific emissions. If the specific emissions value is greater than the second preset threshold, the exhaust gas from the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas from the oil-gas separator outlet; if the specific emissions value is not greater than the second preset threshold, the exhaust gas from the oil-gas separator is discharged.
[0104] This application determines the uncorrected PN value (including the uncorrected PN content in the exhaust gas from the oil separator outlet and the original PN value before DPF treatment) by using engine speed and engine oil quantity. The PN conversion efficiency is determined by DPF temperature, DPF carbon load, vehicle speed, and DPF aging time. When the parameters do not exceed preset thresholds, the oil separator can directly discharge into the atmosphere, reducing exhaust gas pollution to the turbocharger and intake manifold. When the parameters exceed preset thresholds, leaking air from the oil separator needs to re-enter the engine through the intake manifold for DPF treatment, thus resolving the issue of PN content values not meeting regulations.
[0105] See below. Figure 3 A schematic diagram of a specific process for PN detection and processing, when the determination parameter is the tail PN value:
[0106] Step 3001: Determine the uncorrected content value of PN in the exhaust gas at the oil-gas separator outlet based on the current engine speed and engine oil quantity.
[0107] Step 3002: Determine the first correction coefficient corresponding to the uncorrected content value based on the pre-set correspondence between the PN content value and the correction coefficient of the oil-gas separator;
[0108] Step 3003: Correct the uncorrected content value according to the first correction coefficient to obtain the first content value;
[0109] Step 3004: Determine the original PN value of the engine before DPF treatment based on the current engine speed and engine oil level.
[0110] Step 3005: Determine the second correction coefficient corresponding to the current original PN value based on the pre-set correspondence between the original PN value and the correction coefficient.
[0111] Step 3006: Correct the original PN value according to the second correction factor to obtain the corrected original PN value;
[0112] Step 3007: Determine the basic conversion efficiency value corresponding to the current DPF temperature based on the correspondence between DPF temperature and the basic conversion efficiency of DPF to the original PN.
[0113] Step 3008: Determine the third correction factor corresponding to the current DPF carbon loading based on the pre-set correspondence between DPF carbon loading and carbon loading correction factor.
[0114] Step 3009: Determine the fourth correction coefficient corresponding to the current vehicle speed based on the pre-set correspondence between vehicle speed and vehicle speed correction coefficient.
[0115] Step 3010: Determine the fifth correction factor corresponding to the current DPF aging time based on the pre-set correspondence between DPF aging time and aging time correction factor.
[0116] Step 3011: Determine the PN conversion efficiency value based on the PN basic conversion efficiency value, the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient;
[0117] Step 3012: Determine the second PN content value in the exhaust gas after DPF treatment based on the corrected original PN value and PN conversion efficiency value.
[0118] Step 3013: Determine whether the PN value of the tail row is greater than the first preset threshold. If yes, proceed to step 3014; otherwise, proceed to step 3015.
[0119] Step 3014: Connect the exhaust gas from the oil-gas separator to the intake pipe and perform DPF treatment on the exhaust gas from the oil-gas separator outlet.
[0120] Step 3015: Discharge the exhaust gas from the oil-gas separator.
[0121] See below. Figure 4 A schematic diagram of a specific process for detecting and processing PN emissions, when the determination parameter is the specific emission value:
[0122] Step 4001: Determine the uncorrected content value of PN in the exhaust gas at the oil-gas separator outlet based on the current engine speed and engine oil quantity.
[0123] Step 4002: Determine the first correction coefficient corresponding to the uncorrected content value based on the pre-set correspondence between the PN content value and the correction coefficient of the oil-gas separator;
[0124] Step 4003: Correct the uncorrected content value according to the first correction coefficient to obtain the first content value;
[0125] Step 4004: Determine the original PN value of the engine before DPF treatment based on the current engine speed and engine oil level.
[0126] Step 4005: Determine the second correction coefficient corresponding to the current original PN value based on the pre-set correspondence between the original PN value and the correction coefficient.
[0127] Step 4006: Correct the original PN value according to the second correction factor to obtain the corrected original PN value;
[0128] Step 4007: Determine the basic conversion efficiency value corresponding to the current DPF temperature based on the correspondence between DPF temperature and the basic conversion efficiency of DPF to the original PN.
[0129] Step 4008: Determine the third correction factor corresponding to the current DPF carbon loading based on the pre-set correspondence between DPF carbon loading and carbon loading correction factor.
[0130] Step 4009: Determine the fourth correction coefficient corresponding to the current vehicle speed based on the pre-set correspondence between vehicle speed and vehicle speed correction coefficient.
[0131] Step 4010: Determine the fifth correction factor corresponding to the current DPF aging time based on the pre-set correspondence between DPF aging time and aging time correction factor.
[0132] Step 4011: Determine the PN conversion efficiency value based on the PN basic conversion efficiency value, the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient;
[0133] Step 4012: Determine the second PN content value in the exhaust gas after DPF treatment based on the corrected original PN value and PN conversion efficiency value.
[0134] Step 4013: Determine whether the emission value is greater than the second preset threshold. If yes, proceed to step 4014; otherwise, proceed to step 4015.
[0135] Step 4014: Connect the exhaust gas from the oil-gas separator to the intake pipe and perform DPF treatment on the exhaust gas from the oil-gas separator outlet.
[0136] Step 4015: Discharge the exhaust gas from the oil-gas separator.
[0137] Example 2
[0138] Based on the same inventive concept, this application also provides a temperature prediction model training device, such as... Figure 5 As shown, the device includes:
[0139] The content value determination module 501 is used to determine the first content value of PN in the exhaust gas at the outlet of the oil-gas separator and the second content value of PN in the exhaust gas after DPF treatment.
[0140] The determination parameter module 502 is used to determine determination parameters based on the first content value and the second content value;
[0141] The first processing module 503 is used to connect the exhaust gas of the oil-gas separator to the intake pipe and perform DPF treatment on the exhaust gas at the outlet of the oil-gas separator if the determination parameter meets the first preset condition.
[0142] The second processing module 504 is used to discharge the exhaust gas from the oil-gas separator if the determination parameter does not meet the first preset condition.
[0143] Optionally, the content value determination module 501 is specifically used for:
[0144] Determine the uncorrected PN content value in the exhaust gas from the oil-gas separator outlet based on the current engine speed and engine oil level.
[0145] Based on the pre-set correspondence between the PN content value of the oil-gas separator and the correction coefficient, the first correction coefficient corresponding to the uncorrected content value is determined;
[0146] The uncorrected content value is corrected according to the first correction coefficient to obtain the first content value.
[0147] Optionally, the content value determination module 501 is specifically used for:
[0148] Determine the original PN value of the engine before DPF treatment based on the current engine speed and engine oil level.
[0149] Based on the correspondence between DPF temperature and the basic conversion efficiency of DPF to the original PN, determine the basic conversion efficiency value corresponding to the current DPF temperature;
[0150] Based on the original PN value and the basic conversion efficiency value, the second PN content value in the exhaust gas after DPF treatment is determined.
[0151] Optionally, the content value determination module 501 is also used for:
[0152] Based on the pre-set correspondence between the original PN value and the correction coefficient, determine the second correction coefficient corresponding to the current original PN value;
[0153] The original PN value is corrected according to the second correction coefficient to obtain the corrected original PN value;
[0154] Determining the second PN content value in the exhaust gas after DPF treatment includes:
[0155] The second PN content value in the exhaust gas after DPF treatment is determined based on the corrected original PN value and the basic PN conversion efficiency.
[0156] Optionally, the content value determination module 501 is also used to: determine the third correction coefficient corresponding to the current DPF carbon loading based on the pre-set correspondence between DPF carbon loading and carbon loading correction coefficient;
[0157] Based on the pre-set correspondence between vehicle speed and vehicle speed correction coefficient, determine the fourth correction coefficient corresponding to the current vehicle speed;
[0158] Based on the pre-set correspondence between DPF aging time and aging time correction coefficient, determine the fifth correction coefficient corresponding to the current DPF aging time;
[0159] The PN conversion efficiency value is determined based on the PN basic conversion efficiency value, the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient.
[0160] Determining the second PN content value in the exhaust gas after DPF treatment includes:
[0161] The second PN content value in the exhaust gas after DPF treatment is determined based on the corrected original PN value and the PN conversion efficiency value.
[0162] Optionally, the first processing module 503 is specifically used to determine whether the determination parameter meets the first preset condition in the following manner:
[0163] If the determination parameter is greater than a preset threshold, then the first preset condition is determined to be met; if the determination parameter is not greater than the preset threshold, then the first preset condition is determined not to be met.
[0164] Having introduced the PN detection and processing method and apparatus according to exemplary embodiments of this application, we will now introduce an electronic device according to another exemplary embodiment of this application.
[0165] Those skilled in the art will understand that various aspects of this application can be implemented as a system, method, or program product. Therefore, various aspects of this application can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, collectively referred to herein as a "circuit," "module," or "system."
[0166] In some possible implementations, the electronic device according to this application may include at least one processor and at least one memory. The memory stores program code that, when executed by the processor, causes the processor to perform the steps in the PN detection processing method according to the various exemplary embodiments of this application described above.
[0167] In some possible implementations, the electronic device further includes: a first switch installed on the outlet pipe of the oil-gas separator leading to the atmosphere, and a second switch installed on the outlet pipe of the intake pipe leading to the turbocharger from the oil-gas separator; the processor is specifically used to execute:
[0168] When the vehicle starts running, if the determination parameter does not meet the first preset condition, the first switch is turned on and the second switch is turned off to discharge the exhaust gas from the oil-gas separator.
[0169] If the determination parameters meet the first preset condition, the first switch is turned off and the second switch is turned on, so that the exhaust gas from the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas from the oil-gas separator outlet.
[0170] The following reference Figure 6 This application describes an electronic device 130 according to this embodiment, namely the detection and processing device for the PN described above. Figure 6 The electronic device 130 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.
[0171] like Figure 6 As shown, the electronic device 130 is presented in the form of a general-purpose electronic device. The components of the electronic device 130 may include, but are not limited to: at least one processor 131, at least one memory 132, and a bus 133 connecting different system components (including memory 132 and processor 131).
[0172] Bus 133 represents one or more of several bus structures, including a memory bus or memory controller, peripheral bus, processor, or local bus using any of the various bus structures.
[0173] The memory 132 may include a readable medium in the form of volatile memory, such as random access memory (RAM) 1321 and / or cache memory 1322, and may further include read-only memory (ROM) 1323.
[0174] The memory 132 may also include a program / utility 1325 having a set (at least one) of program modules 1324, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.
[0175] Electronic device 130 can also communicate with one or more external devices 134 (e.g., keyboard, pointing device, etc.), and with one or more devices that enable a user to interact with electronic device 130, and / or with any device that enables electronic device 130 to communicate with one or more other electronic devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 135. Furthermore, electronic device 130 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 136. As shown, network adapter 136 communicates with other modules used in electronic device 130 via bus 133. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 130, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
[0176] In some possible implementations, various aspects of the PN detection and processing method provided in this application can also be implemented in the form of a program product, which includes program code. When the program product is run on a computer device, the program code is used to cause the computer device to perform the steps of the PN detection and processing method according to various exemplary embodiments of this application described above.
[0177] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.
[0178] The monitoring program product of the embodiments of this application may employ a portable compact disc read-only memory (CD-ROM) and include program code, and may run on an electronic device. However, the program product of this application is not limited thereto. In this document, the readable storage medium may be any tangible medium that contains or stores a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.
[0179] A readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying readable program code. This propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting a program for use by or in conjunction with an instruction execution system, apparatus, or device.
[0180] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.
[0181] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java and C++, and conventional procedural programming languages such as C or similar languages. The program code can execute entirely on the user's electronic device, partially on the user's device, as a standalone software package, partially on the user's electronic device and partially on a remote electronic device, or entirely on a remote electronic device or server. In cases involving remote electronic devices, the remote electronic device can be connected to the user's electronic device via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external electronic device (e.g., via the Internet using an Internet service provider).
[0182] It should be noted that although several units or sub-units of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.
[0183] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.
[0184] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0185] This application is described with reference to flowchart illustrations and block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block and / or block in the flowchart illustrations and block diagrams, as well as combinations of blocks and processes in the flowchart illustrations and block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0186] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and boxes Figure 1 The function specified in one or more boxes.
[0187] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and boxes Figure 1 The steps of the function specified in one or more boxes.
[0188] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.
[0189] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. A method for detecting and processing PN, characterized in that, The method includes: Determine the first PN content value in the exhaust gas from the oil-gas separator outlet and the second PN content value in the exhaust gas after DPF treatment; Based on the first content value and the second content value, a determination parameter is determined, wherein the determination parameter is either the tail emission PN value or the specific emission value; If the determination parameter meets the first preset condition, the exhaust gas of the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas at the outlet of the oil-gas separator. If the determination parameter does not meet the first preset condition, the exhaust gas from the oil-gas separator is discharged. The second content value is determined by the following steps: Based on the current engine speed and engine oil level, determine the original engine PN value before DPF treatment; based on the pre-set correspondence between the original engine PN value and the correction coefficient, determine the second correction coefficient corresponding to the current original engine PN value; correct the original engine PN value according to the second correction coefficient to obtain the corrected original engine PN value. Based on the correspondence between DPF temperature and the basic conversion efficiency of DPF to the original PN, determine the basic conversion efficiency value corresponding to the current DPF temperature; Based on the pre-set correspondence between DPF carbon loading and carbon loading correction coefficient, a third correction coefficient corresponding to the current DPF carbon loading is determined; based on the pre-set correspondence between vehicle speed and vehicle speed correction coefficient, a fourth correction coefficient corresponding to the current vehicle speed is determined; based on the pre-set correspondence between DPF aging time and aging time correction coefficient, a fifth correction coefficient corresponding to the current DPF aging time is determined; based on the basic conversion efficiency value, the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient, the PN conversion efficiency value is determined. Based on the corrected original PN value and the PN conversion efficiency value, the second content value is determined using the following formula: The second content value = the corrected original PN value - the corrected original PN value The PN conversion efficiency value.
2. The method according to claim 1, characterized in that, Determine the first PN content value in the exhaust gas from the oil-gas separator outlet, including: Determine the uncorrected PN content value in the exhaust gas from the oil-gas separator outlet based on the current engine speed and engine oil level. Based on the pre-set correspondence between the PN content value of the oil-gas separator and the correction coefficient, the first correction coefficient corresponding to the uncorrected content value is determined; The uncorrected content value is corrected according to the first correction coefficient to obtain the first content value.
3. The method according to claim 1, characterized in that, The method further includes: Based on the original PN value and the basic conversion efficiency value, the second PN content value in the exhaust gas after DPF treatment is determined.
4. The method according to claim 1, characterized in that, The method further includes: Based on the corrected original PN value and the basic conversion efficiency value, the second PN content value in the exhaust gas after DPF treatment is determined.
5. The method according to any one of claims 1 to 4, characterized in that, The determination parameter is used to determine whether it meets the first preset condition in the following ways: If the determination parameter is greater than a preset threshold, then the first preset condition is determined to be met; if the determination parameter is not greater than the preset threshold, then the first preset condition is determined not to be met.
6. A detection and processing device for PN, characterized in that, The device includes: The content value determination module is used to determine the first PN content value in the exhaust gas from the oil-gas separator outlet and the second PN content value in the exhaust gas after DPF treatment. The second content value is determined through the following steps: determining the original engine PN value before DPF treatment based on the current engine speed and engine oil level; determining the second correction coefficient corresponding to the current original engine PN value based on a pre-set correspondence between the original engine PN value and the correction coefficient; correcting the original engine PN value according to the second correction coefficient to obtain the corrected original engine PN value; determining the basic conversion efficiency value corresponding to the current DPF temperature based on the correspondence between DPF temperature and the basic conversion efficiency of DPF for the original engine PN; and determining the second correction coefficient based on a pre-set DPF carbon content value. The correspondence between load capacity and carbon load correction coefficient is used to determine the third correction coefficient corresponding to the current DPF carbon load; the correspondence between the pre-set vehicle speed and vehicle speed correction coefficient is used to determine the fourth correction coefficient corresponding to the current vehicle speed; the correspondence between the pre-set DPF aging time and aging time correction coefficient is used to determine the fifth correction coefficient corresponding to the current DPF aging time; the PN conversion efficiency value is determined based on the basic conversion efficiency value, the third correction coefficient, the fourth correction coefficient, and the fifth correction coefficient; the second content value is determined based on the corrected original PN value and the PN conversion efficiency value using the following formula: Second content value = Corrected original PN value - Corrected original PN value The PN conversion efficiency value; The determination parameter module is used to determine a determination parameter based on the first content value and the second content value, wherein the determination parameter is either the tail emission PN value or the specific emission value; The first processing module is used to connect the exhaust gas of the oil-gas separator to the intake pipe and perform DPF treatment on the exhaust gas at the outlet of the oil-gas separator if the determination parameter meets the first preset condition. The second processing module is used to discharge the exhaust gas from the oil-gas separator if the determination parameter does not meet the first preset condition.
7. An electronic device, characterized in that, The method includes at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method as described in any one of claims 1-5.
8. The electronic device according to claim 7, characterized in that, Also includes: A first switch is installed on the first outlet pipe of the oil-gas separator leading to the atmosphere, and a second switch is installed on the second outlet pipe of the intake pipe leading to the turbocharger from the oil-gas separator. The processor is specifically used to execute: When the vehicle starts running, if the determination parameter does not meet the first preset condition, the first switch is turned on and the second switch is turned off to discharge the exhaust gas from the oil-gas separator. If the determination parameters meet the first preset conditions, the first switch is turned off and the second switch is turned on, so that the exhaust gas of the oil-gas separator is connected to the intake pipe to perform DPF treatment on the exhaust gas of the oil-gas separator outlet.
9. A computer storage medium, characterized in that, The computer storage medium stores a computer program that enables the computer to perform the method as described in any one of claims 1-5.