WO2023134683A1 - Double-dpf regeneration control method and apparatus, and engine - Google Patents

Double-dpf regeneration control method and apparatus, and engine Download PDF

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WO2023134683A1
WO2023134683A1 PCT/CN2023/071639 CN2023071639W WO2023134683A1 WO 2023134683 A1 WO2023134683 A1 WO 2023134683A1 CN 2023071639 W CN2023071639 W CN 2023071639W WO 2023134683 A1 WO2023134683 A1 WO 2023134683A1
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dpf
temperature
upstream
set value
doc
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PCT/CN2023/071639
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French (fr)
Chinese (zh)
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王志坚
王国栋
杜祥宁
傅晓磊
张勇
李钊
谭治学
王秀雷
褚国良
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潍柴动力股份有限公司
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Publication of WO2023134683A1 publication Critical patent/WO2023134683A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1411—Exhaust gas flow rate, e.g. mass flow rate or volumetric flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1602—Temperature of exhaust gas apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1606—Particle filter loading or soot amount
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present application relates to the technical field of automobile control, for example, to a dual DPF regeneration control method, device and engine.
  • one diesel oxidation catalyst Diesel Oxidation Catalysis, DOC
  • diesel particulate filter diesel particulate filter, DPF
  • DOC + DPF diesel particulate filter
  • the present application provides a double DPF regeneration control method, device and engine, capable of dealing with poor reliability when dual DPF regeneration is performed.
  • An embodiment provides a dual DPF regeneration control method, which is applied to an engine aftertreatment system including a dual DPF, including:
  • the upstream temperature of the DPF is determined based on the upstream temperature sensor of another DPF, and the internal temperature of each DPF is determined based on multiple internal temperature sensors in each DPF. regeneration peak temperature and maximum temperature gradient;
  • the regeneration peak temperature is controlled according to the set value of the upstream temperature of the DPF, and the maximum temperature gradient is controlled according to the set value of the maximum temperature gradient.
  • the set value of the DPF upstream temperature is determined according to the exhaust gas mass flow rate, DOC upstream temperature, SCR upstream temperature and carbon load, specifically:
  • the set basic value of the DPF upstream temperature is obtained
  • the set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
  • the setting value of the maximum temperature gradient is determined according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR, specifically:
  • the set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
  • the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.
  • the present application also proposes a dual DPF regeneration control device, which is applied to an engine aftertreatment system including a dual DPF, and the device includes:
  • the first determination module is used to determine the upstream temperature of the DPF based on the upstream temperature sensor of another DPF when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, and based on multiple Internal temperature sensors determine regeneration peak temperature and maximum temperature gradient in each DPF;
  • the second determination module is used to determine the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load;
  • the third determination module is used to determine the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR;
  • the control module controls the regeneration peak temperature according to the set value of the upstream temperature of the DPF during active regeneration of the DPF, and controls the maximum temperature gradient according to the set value of the maximum temperature gradient.
  • the second determination module is specifically configured to:
  • the set basic value of the DPF upstream temperature is obtained
  • the set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
  • the third determining module is specifically configured to:
  • the set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
  • the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.
  • the present application also proposes an engine, including the dual DPF regeneration control device as described above.
  • the double DPF regeneration control method, device and engine provided by the present application in the engine aftertreatment system including double DPF, when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one of the DPFs reports a reliability failure, based on another
  • a DPF upstream temperature sensor determines the DPF upstream temperature, and the regeneration peak temperature and maximum temperature gradient in each DPF based on multiple internal temperature sensors in each DPF; based on exhaust gas mass flow, DOC upstream temperature, SCR upstream temperature and carbon load Determine the set value of the DPF upstream temperature; determine the set value of the maximum temperature gradient according to the HC aging factor, DOC downstream temperature and SCR upstream temperature; during the active regeneration of the DPF, control the regeneration peak temperature according to the set value of the DPF upstream temperature, And the maximum temperature gradient is controlled according to the set value of the maximum temperature gradient, thereby improving the reliability of double DPF regeneration.
  • FIG. 1 shows a schematic flow diagram of a double DPF regeneration control method proposed by an embodiment of the present application
  • Fig. 2 shows the layout diagram of the engine aftertreatment system in an embodiment of the present application
  • FIG. 3 shows a schematic diagram of the arrangement of internal temperature sensors of each DPF in an embodiment of the present application
  • FIG. 4 shows a logic diagram of a DPF regeneration control method based on different SCR upstream temperature corrections in an embodiment of the present application
  • Fig. 5 shows a schematic structural diagram of a dual DPF regeneration control device proposed by an embodiment of the present application.
  • An embodiment of the present application provides a double DPF regeneration control method, which is applied to an engine aftertreatment system including a double DPF. When one of them is detected, a plausibility failure of the DPF upstream temperature sensor is reported. When using the measured value of another DPF upstream temperature sensor to control the regeneration temperature, based on different Selective Catalytic Reduction converter (Selective Catalytic Reduction, SCR) upstream temperature to control and correct the DPF front set temperature and maximum temperature gradient in the regeneration process .
  • SCR Selective Catalytic Reduction
  • the method includes the following steps:
  • Step S101 when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, determine the upstream temperature of the DPF based on the upstream temperature sensor of another DPF, and determine the temperature based on multiple internal temperature sensors in each DPF Regeneration peak temperature and maximum temperature gradient in each DPF.
  • the dual-DPF engine aftertreatment system includes two DOC+DPFs arranged in parallel, and each DPF is provided with an upstream temperature sensor and a plurality of internal temperature sensors.
  • the DPF enters the active regeneration mode based on the active regeneration request.
  • the upstream temperature sensor based on another DPF Determining a DPF upstream temperature, and determining a regeneration peak temperature and a maximum temperature gradient in each DPF based on a plurality of internal temperature sensors in each DPF, the maximum temperature gradient being a maximum rate of rise of a set point for the DPF upstream temperature.
  • the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.
  • FIG. 3 is a schematic diagram of arrangement of internal temperature sensors of each DPF.
  • Step S102 determine the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load.
  • the mass flow rate of exhaust gas can be obtained by a flow meter
  • the temperature upstream of the DOC can be obtained by a temperature sensor arranged upstream of the DOC
  • the temperature upstream of the SCR can be obtained by a temperature sensor arranged upstream of the SCR
  • the carbon load can be based on the carbon load model calculated.
  • the exhaust gas mass flow rate, DOC upstream temperature, SCR upstream temperature and carbon load, the set value of the DPF upstream temperature can be determined, and the set value can ensure that the regeneration peak temperature of the internal temperature of the DPF does not exceed the safe temperature.
  • the set value of the temperature upstream of the DPF is determined according to the mass flow rate of the exhaust gas, the temperature upstream of the DOC, the temperature upstream of the SCR, and the carbon load, specifically:
  • the set basic value of the DPF upstream temperature is obtained
  • the set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
  • the set base value of the DPF upstream temperature is obtained, and then the set base value of the DPF upstream temperature is determined according to different SCR upstream temperatures and carbon loads. The value is corrected, and the set value of the DPF upstream temperature is obtained after correction.
  • the set basic value of the DPF upstream temperature can be corrected according to the first preset corresponding relationship between different SCR upstream temperatures and carbon loads and the set basic value of the DPF upstream temperature.
  • Step S103 determining the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR.
  • the temperature downstream of the DOC can be obtained by a temperature sensor arranged downstream of the DOC
  • the temperature upstream of the SCR can be obtained by a temperature sensor arranged upstream of the SCR.
  • the acquisition process of the HC aging factor is a prior art and will not be repeated here.
  • the maximum temperature gradient setting can be determined according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR
  • the set value of the maximum temperature gradient is determined according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR, specifically:
  • the set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
  • the DOC downstream temperature look-up table may be a MAP table
  • the set base value of the maximum temperature gradient can be corrected according to the second preset corresponding relationship between different SCR upstream temperatures and the set base value of the maximum temperature gradient.
  • Step S104 during the active regeneration of the DPF, control the regeneration peak temperature according to the set value of the upstream temperature of the DPF, and control the maximum temperature gradient according to the set value of the maximum temperature gradient.
  • the DPF when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, the DPF is determined based on the upstream temperature sensor of the other DPF Upstream temperature, and determination of regeneration peak temperature and maximum temperature gradient in each DPF based on multiple internal temperature sensors in each DPF; set point for DPF upstream temperature based on exhaust gas mass flow, DOC upstream temperature, SCR upstream temperature, and carbon load ;Determine the setting value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR; during the active regeneration of the DPF, control the regeneration peak temperature according to the setting value of the upstream temperature of the DPF, and according to the setting of the maximum temperature gradient The value controls the maximum temperature gradient, which improves reliability when dual DPFs are being regenerated.
  • the exhaust gas after the TC (turbine charger, turbocharger) is injected HC 20, two-way DOC+DPF, urea injection 50, two-way SCR +ASC (Ammonia Slip Catalyst, ammonia oxidation catalyst) and then discharged.
  • a temperature sensor 30 is installed upstream of each DPF.
  • a NOx sensor 10 and a temperature sensor 30 are installed on the exhaust pipeline upstream of the DOC.
  • a differential pressure sensor 40 is installed in each DPF.
  • the exhaust pipeline upstream of the SCR The temperature sensor 30 is installed in the middle, and the NOx sensor 10, the temperature sensor 30 and the PM sensor 60 are installed in the exhaust pipeline downstream of the ASC.
  • Figure 4 shows the logic diagram of the DPF regeneration control method based on different SCR upstream temperature corrections.
  • the set basic value of the DPF upstream temperature is obtained, and different SCR upstream temperatures and carbon loads are added.
  • the set value of the DPF upstream temperature is obtained after correcting the set base value of the DPF upstream temperature.
  • the regeneration peak temperature is controlled according to the set value of the upstream temperature of the DPF
  • the maximum temperature gradient is controlled according to the set value of the maximum temperature gradient.
  • This solution controls and corrects the pre-set temperature and maximum temperature gradient of the DPF during the regeneration process according to the upstream temperature of the SCR and the internal temperature of the DPF.
  • the temperature control of the DPF regeneration process is safer and can effectively improve the reliability of the DPF.
  • the embodiment of the present application also proposes a dual DPF regeneration control device, which is applied to an engine aftertreatment system including a dual DPF, as shown in FIG. 5 , the device includes:
  • the first determination module 501 is used to determine the upstream temperature of the DPF based on the upstream temperature sensor of another DPF when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, and based on the multiple An internal temperature sensor determines the regeneration peak temperature and maximum temperature gradient in each DPF;
  • the second determination module 502 is used to determine the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load;
  • the third determination module 503 is used to determine the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR;
  • the control module 504 controls the regeneration peak temperature according to the set value of the upstream temperature of the DPF during active regeneration of the DPF, and controls the maximum temperature gradient according to the set value of the maximum temperature gradient.
  • the second determining module 502 is specifically used for:
  • the set basic value of the DPF upstream temperature is obtained
  • the set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
  • the third determination module 503 is specifically used for:
  • the set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
  • the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

A double-DPF regeneration control method. The method is applied to an engine aftertreatment system comprising double DPFs. The method comprises: when each DPF is detected to be in an active regeneration mode and an upstream temperature sensor of one of the DPFs reports a credibility fault, determining a DPF upstream temperature on the basis of an upstream temperature sensor of the other DPF, and determining a regeneration peak temperature and a maximum temperature gradient in each DPF on the basis of a plurality of internal temperature sensors in each DPF; determining a set value of the DPF upstream temperature according to a mass flow rate of waste gas, a DOC upstream temperature, an SCR upstream temperature, and carbon loading capacity; determining a set value of the maximum temperature gradient according to an HC aging factor, a DOC downstream temperature, and the SCR upstream temperature; and in the active regeneration process of the DPF, controlling the regeneration peak temperature according to the set value of the DPF upstream temperature, and controlling the maximum temperature gradient according to the set value of the maximum temperature gradient, thereby improving the reliability during the double-DPF regeneration. Also related are a double-DPF regeneration control apparatus, and an engine.

Description

双DPF再生控制方法、装置和发动机Double DPF regeneration control method, device and engine
本申请要求2022年01月11日提交中国专利局、申请号为202210026429.2、发明名称为“一种双DPF再生控制方法、装置和发动机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application submitted to the China Patent Office on January 11, 2022, with the application number 202210026429.2, and the title of the invention is "a dual DPF regeneration control method, device and engine", the entire content of which is incorporated by reference In this application.
技术领域technical field
本申请涉及汽车控制技术领域，例如涉及一种双DPF再生控制方法、装置和发动机。The present application relates to the technical field of automobile control, for example, to a dual DPF regeneration control method, device and engine.
背景技术Background technique
后处理增加一路柴油氧化催化器(Diesel Oxidation Catalysis，DOC)+柴油颗粒物捕集器(diesel particulate filter，DPF)，两路DOC+DPF平行布置。增加一个DPF上游温度传感器，这样布置可以降低发动机排气背压，提高发动机热效率，节省油耗，降低使用成本。After-treatment, one diesel oxidation catalyst (Diesel Oxidation Catalysis, DOC) + diesel particulate filter (diesel particulate filter, DPF) is added, and two DOC + DPF are arranged in parallel. Add a DPF upstream temperature sensor, this arrangement can reduce the exhaust back pressure of the engine, improve the thermal efficiency of the engine, save fuel consumption, and reduce the cost of use.
当检测到其中一个报出DPF上游温度传感器可信性故障。用另外一个DPF上游温度传感器的测量值进行再生温度控制时，DPF内部可能出现较高的温度峰值会导致载体出现烧裂、烧融等损坏情况。When one of them is detected, a plausibility failure of the DPF upstream temperature sensor is reported. When using the measurement value of another DPF upstream temperature sensor to control the regeneration temperature, there may be a higher temperature peak inside the DPF, which will cause damage to the carrier such as burning and melting.
发明内容Contents of the invention
本申请提供一种双DPF再生控制方法、装置和发动机，能够处理双DPF进行再生时的可靠性差的情况。The present application provides a double DPF regeneration control method, device and engine, capable of dealing with poor reliability when dual DPF regeneration is performed.
一实施例提供一种双DPF再生控制方法，该方法应用于包括双DPF的发动机后处理系统中，包括：An embodiment provides a dual DPF regeneration control method, which is applied to an engine aftertreatment system including a dual DPF, including:
当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度；When it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, the upstream temperature of the DPF is determined based on the upstream temperature sensor of another DPF, and the internal temperature of each DPF is determined based on multiple internal temperature sensors in each DPF. regeneration peak temperature and maximum temperature gradient;
根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值；Determine the set value of DPF upstream temperature according to exhaust gas mass flow rate, DOC upstream temperature, SCR upstream temperature and carbon load;
根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯 度的设定值；Determine the set point for the maximum temperature gradient based on the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR;
在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度。During active regeneration of the DPF, the regeneration peak temperature is controlled according to the set value of the upstream temperature of the DPF, and the maximum temperature gradient is controlled according to the set value of the maximum temperature gradient.
在本申请一些实施例中，根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值，具体为：In some embodiments of the present application, the set value of the DPF upstream temperature is determined according to the exhaust gas mass flow rate, DOC upstream temperature, SCR upstream temperature and carbon load, specifically:
根据废气质量流量和DOC上游温度查表得到DPF上游温度的设定基础值；According to the exhaust gas mass flow rate and the DOC upstream temperature look-up table, the set basic value of the DPF upstream temperature is obtained;
根据不同SCR上游温度和碳载量对DPF上游温度的设定基础值修正后确定DPF上游温度的设定值。The set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
在本申请一些实施例中，根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值，具体为：In some embodiments of the present application, the setting value of the maximum temperature gradient is determined according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR, specifically:
根据HC老化因子和DOC下游温度查表确定最大温度梯度的设定基础值；Determine the set base value of the maximum temperature gradient according to the HC aging factor and the temperature look-up table downstream of the DOC;
根据不同SCR上游温度对最大温度梯度的设定基础值修正后确定最大温度梯度的设定值。The set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
在本申请一些实施例中，各所述内部温度传感器按轴向和径向在DPF中均匀分布。In some embodiments of the present application, the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.
相应的，本申请还提出了一种双DPF再生控制装置，应用于包括双DPF的发动机后处理系统中，所述装置包括：Correspondingly, the present application also proposes a dual DPF regeneration control device, which is applied to an engine aftertreatment system including a dual DPF, and the device includes:
第一确定模块，用于当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度；The first determination module is used to determine the upstream temperature of the DPF based on the upstream temperature sensor of another DPF when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, and based on multiple Internal temperature sensors determine regeneration peak temperature and maximum temperature gradient in each DPF;
第二确定模块，用于根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值；The second determination module is used to determine the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load;
第三确定模块，用于根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值；The third determination module is used to determine the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR;
控制模块，在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度。The control module controls the regeneration peak temperature according to the set value of the upstream temperature of the DPF during active regeneration of the DPF, and controls the maximum temperature gradient according to the set value of the maximum temperature gradient.
在本申请一些实施例中，所述第二确定模块，具体用于：In some embodiments of the present application, the second determination module is specifically configured to:
根据废气质量流量和DOC上游温度查表得到DPF上游温度的设定基础值；According to the exhaust gas mass flow rate and the DOC upstream temperature look-up table, the set basic value of the DPF upstream temperature is obtained;
根据不同SCR上游温度和碳载量对DPF上游温度的设定基础值修正后确定DPF上游温度的设定值。The set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
在本申请一些实施例中，所述第三确定模块，具体用于：In some embodiments of the present application, the third determining module is specifically configured to:
根据HC老化因子和DOC下游温度查表确定最大温度梯度的设定基础值；Determine the set base value of the maximum temperature gradient according to the HC aging factor and the temperature look-up table downstream of the DOC;
根据不同SCR上游温度对最大温度梯度的设定基础值修正后确定最大温度梯度的设定值。The set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
在本申请一些实施例中，各所述内部温度传感器按轴向和径向在DPF中均匀分布。In some embodiments of the present application, the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.
相应的，本申请还提出了一种发动机，包括如上所述的双DPF再生控制装置。Correspondingly, the present application also proposes an engine, including the dual DPF regeneration control device as described above.
本申请提供的双DPF再生控制方法、装置和发动机，在包括双DPF的发动机后处理系统中，当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度；根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值；根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值；在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度，从而提高了双DPF进行再生时的可靠性。The double DPF regeneration control method, device and engine provided by the present application, in the engine aftertreatment system including double DPF, when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one of the DPFs reports a reliability failure, based on another A DPF upstream temperature sensor determines the DPF upstream temperature, and the regeneration peak temperature and maximum temperature gradient in each DPF based on multiple internal temperature sensors in each DPF; based on exhaust gas mass flow, DOC upstream temperature, SCR upstream temperature and carbon load Determine the set value of the DPF upstream temperature; determine the set value of the maximum temperature gradient according to the HC aging factor, DOC downstream temperature and SCR upstream temperature; during the active regeneration of the DPF, control the regeneration peak temperature according to the set value of the DPF upstream temperature, And the maximum temperature gradient is controlled according to the set value of the maximum temperature gradient, thereby improving the reliability of double DPF regeneration.
附图说明Description of drawings
图1示出了本申请一实施例提出的一种双DPF再生控制方法的流程示意图；FIG. 1 shows a schematic flow diagram of a double DPF regeneration control method proposed by an embodiment of the present application;
图2示出了本申请一实施例中发动机后处理系统布置图；Fig. 2 shows the layout diagram of the engine aftertreatment system in an embodiment of the present application;
图3示出了本申请一实施例中各DPF的内部温度传感器布置示意图；FIG. 3 shows a schematic diagram of the arrangement of internal temperature sensors of each DPF in an embodiment of the present application;
图4示出了本申请一实施例中基于不同SCR上游温度修正的DPF 再生控制方法逻辑图；FIG. 4 shows a logic diagram of a DPF regeneration control method based on different SCR upstream temperature corrections in an embodiment of the present application;
图5示出了本申请一实施例提出的一种双DPF再生控制装置的结构示意图。Fig. 5 shows a schematic structural diagram of a dual DPF regeneration control device proposed by an embodiment of the present application.
具体实施方式Detailed ways
本申请实施例提供一种双DPF再生控制方法，应用于包括双DPF的发动机后处理系统中。当检测到其中一个报出DPF上游温度传感器可信性故障。用另外一个DPF上游温度传感器的测量值进行再生温度控制时，基于不同选择性催化还原转化器(Selective Catalytic Reduction,，SCR)上游温度来控制修正再生过程中的DPF前设定温度和最大温度梯度。An embodiment of the present application provides a double DPF regeneration control method, which is applied to an engine aftertreatment system including a double DPF. When one of them is detected, a plausibility failure of the DPF upstream temperature sensor is reported. When using the measured value of another DPF upstream temperature sensor to control the regeneration temperature, based on different Selective Catalytic Reduction converter (Selective Catalytic Reduction, SCR) upstream temperature to control and correct the DPF front set temperature and maximum temperature gradient in the regeneration process .
如图1所示，该方法包括以下步骤：As shown in Figure 1, the method includes the following steps:
步骤S101，当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度。Step S101, when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, determine the upstream temperature of the DPF based on the upstream temperature sensor of another DPF, and determine the temperature based on multiple internal temperature sensors in each DPF Regeneration peak temperature and maximum temperature gradient in each DPF.
本实施例中，双DPF的发动机后处理系统中包括平行布置的两路DOC+DPF，每个DPF中均设置有上游温度传感器和多个内部温度传感器。In this embodiment, the dual-DPF engine aftertreatment system includes two DOC+DPFs arranged in parallel, and each DPF is provided with an upstream temperature sensor and a plurality of internal temperature sensors.
DPF基于主动再生请求进入主动再生模式，当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，为了保证进行主动再生的可靠性，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度，最大温度梯度为DPF上游温度的设定值的最大上升速率。The DPF enters the active regeneration mode based on the active regeneration request. When it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, in order to ensure the reliability of active regeneration, the upstream temperature sensor based on another DPF Determining a DPF upstream temperature, and determining a regeneration peak temperature and a maximum temperature gradient in each DPF based on a plurality of internal temperature sensors in each DPF, the maximum temperature gradient being a maximum rate of rise of a set point for the DPF upstream temperature.
为了更加准确的确定各DPF中的温度分布，在本申请一些实施例中，各所述内部温度传感器按轴向和径向在DPF中均匀分布。In order to determine the temperature distribution in each DPF more accurately, in some embodiments of the present application, the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.
在本申请具体的应用场景中，如图3所示为各DPF的内部温度传感器布置示意图。In a specific application scenario of the present application, FIG. 3 is a schematic diagram of arrangement of internal temperature sensors of each DPF.
本领域技术人员可根据实际需要选择其他的内部传感器的布置方式，这并不影响本申请的保护范围。Those skilled in the art may choose other arrangements of internal sensors according to actual needs, which does not affect the protection scope of the present application.
步骤S102，根据废气质量流量、DOC上游温度、SCR上游温度和碳 载量确定DPF上游温度的设定值。Step S102, determine the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load.
本实施例中，废气质量流量可通过流量计获取，DOC上游温度可通过布置在DOC上游的温度传感器获取，SCR上游温度可通过布置在SCR上游的温度传感器获取，碳载量可基于碳载量模型计算得出。根据废气质量流量、DOC上游温度、SCR上游温度和碳载量可确定DPF上游温度的设定值，该设定值可保证DPF的内部温度的再生峰值温度不超过安全温度。In this embodiment, the mass flow rate of exhaust gas can be obtained by a flow meter, the temperature upstream of the DOC can be obtained by a temperature sensor arranged upstream of the DOC, the temperature upstream of the SCR can be obtained by a temperature sensor arranged upstream of the SCR, and the carbon load can be based on the carbon load model calculated. According to the exhaust gas mass flow rate, DOC upstream temperature, SCR upstream temperature and carbon load, the set value of the DPF upstream temperature can be determined, and the set value can ensure that the regeneration peak temperature of the internal temperature of the DPF does not exceed the safe temperature.
为了准确的确定DPF上游温度的设定值，在本申请一些实施例中，根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值，具体为：In order to accurately determine the set value of the temperature upstream of the DPF, in some embodiments of the present application, the set value of the temperature upstream of the DPF is determined according to the mass flow rate of the exhaust gas, the temperature upstream of the DOC, the temperature upstream of the SCR, and the carbon load, specifically:
根据废气质量流量和DOC上游温度查表得到DPF上游温度的设定基础值；According to the exhaust gas mass flow rate and the DOC upstream temperature look-up table, the set basic value of the DPF upstream temperature is obtained;
根据不同SCR上游温度和碳载量对DPF上游温度的设定基础值修正后确定DPF上游温度的设定值。The set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
本实施例中，先根据废气质量流量和DOC上游温度查表(可以为MAP表)得到DPF上游温度的设定基础值，然后根据不同SCR上游温度和碳载量对DPF上游温度的设定基础值进行修正，修正后得到DPF上游温度的设定值。In this embodiment, firstly, according to the mass flow rate of exhaust gas and the DOC upstream temperature look-up table (which can be a MAP table), the set base value of the DPF upstream temperature is obtained, and then the set base value of the DPF upstream temperature is determined according to different SCR upstream temperatures and carbon loads. The value is corrected, and the set value of the DPF upstream temperature is obtained after correction.
可根据不同SCR上游温度和碳载量与DPF上游温度的设定基础值的第一预设对应关系对DPF上游温度的设定基础值进行修正。The set basic value of the DPF upstream temperature can be corrected according to the first preset corresponding relationship between different SCR upstream temperatures and carbon loads and the set basic value of the DPF upstream temperature.
根据废气质量流量和DOC上游温度查表得到所述设定值的基础值的具体过程为现有技术，在此不再赘述。The specific process of obtaining the basic value of the set value according to the exhaust gas mass flow rate and the DOC upstream temperature table look-up is the prior art, and will not be repeated here.
需要说明的是，以上实施例的方案仅为本申请所提出的一种具体实现方案，其他根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值的方式均属于本申请的保护范围。It should be noted that the scheme of the above embodiment is only a specific implementation scheme proposed by this application, and other ways of determining the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, DOC upstream temperature, SCR upstream temperature and carbon load All belong to the scope of protection of this application.
步骤S103，根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值。Step S103, determining the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR.
本实施例中，DOC下游温度可通过布置在DOC下游的温度传感器获取，SCR上游温度可通过布置在SCR上游的温度传感器获取，HC老化因子的获取过程为现有技术，在此不再赘述。根据HC老化因子、DOC下游温度和SCR上游温度可确定最大温度梯度的设定值In this embodiment, the temperature downstream of the DOC can be obtained by a temperature sensor arranged downstream of the DOC, and the temperature upstream of the SCR can be obtained by a temperature sensor arranged upstream of the SCR. The acquisition process of the HC aging factor is a prior art and will not be repeated here. The maximum temperature gradient setting can be determined according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR
为了准确的确定最大温度梯度的设定值，在本申请一些实施例中，根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值，具体为：In order to accurately determine the set value of the maximum temperature gradient, in some embodiments of the present application, the set value of the maximum temperature gradient is determined according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR, specifically:
根据HC老化因子和DOC下游温度查表确定最大温度梯度的设定基础值；Determine the set base value of the maximum temperature gradient according to the HC aging factor and the temperature look-up table downstream of the DOC;
根据不同SCR上游温度对最大温度梯度的设定基础值修正后确定最大温度梯度的设定值。The set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
本实施例中，先根据HC老化因子和DOC下游温度查表(可以为MAP表)确定最大温度梯度的设定基础值，然后根据不同SCR上游温度对最大温度梯度的设定基础值进行修正，修正后得到最大温度梯度的设定值。In this embodiment, first determine the set base value of the maximum temperature gradient according to the HC aging factor and the DOC downstream temperature look-up table (may be a MAP table), and then correct the set base value of the maximum temperature gradient according to different SCR upstream temperatures, After correction, the set value of the maximum temperature gradient is obtained.
可根据不同SCR上游温度和最大温度梯度的设定基础值的第二预设对应关系对最大温度梯度的设定基础值进行修正。The set base value of the maximum temperature gradient can be corrected according to the second preset corresponding relationship between different SCR upstream temperatures and the set base value of the maximum temperature gradient.
根据HC老化因子和DOC下游温度查表得到最大温度梯度的设定基础值的具体过程为现有技术，在此不再赘述。The specific process of obtaining the set base value of the maximum temperature gradient according to the HC aging factor and the DOC downstream temperature look-up table is the prior art, and will not be repeated here.
需要说明的是，以上实施例的方案仅为本申请所提出的一种具体实现方案，其他根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值的方式均属于本申请的保护范围。It should be noted that the scheme of the above embodiment is only a specific implementation scheme proposed by this application, and other methods of determining the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR all belong to this application scope of protection.
步骤S104，在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度。Step S104, during the active regeneration of the DPF, control the regeneration peak temperature according to the set value of the upstream temperature of the DPF, and control the maximum temperature gradient according to the set value of the maximum temperature gradient.
通过应用以上技术方案，在包括双DPF的发动机后处理系统中，当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度；根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值；根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值；在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度，从而提高了双DPF进行再生时的可靠性。By applying the above technical solutions, in an engine aftertreatment system including dual DPFs, when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, the DPF is determined based on the upstream temperature sensor of the other DPF Upstream temperature, and determination of regeneration peak temperature and maximum temperature gradient in each DPF based on multiple internal temperature sensors in each DPF; set point for DPF upstream temperature based on exhaust gas mass flow, DOC upstream temperature, SCR upstream temperature, and carbon load ;Determine the setting value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR; during the active regeneration of the DPF, control the regeneration peak temperature according to the setting value of the upstream temperature of the DPF, and according to the setting of the maximum temperature gradient The value controls the maximum temperature gradient, which improves reliability when dual DPFs are being regenerated.
如图2所示为本申请实施例中发动机后处理系统布置图，TC(turbine charger，涡轮增压器)后的排气经HC喷射20、两路DOC+DPF、 尿素喷射50、两路SCR+ASC(Ammonia Slip Catalyst，氨气氧化催化器)后排出。各DPF的上游分别设置有温度传感器30，另外，在DOC上游的排气管路上还设置有NO X传感器10、温度传感器30，各DPF中分别设置压差传感器40，SCR上游的排气管路中设置温度传感器30，在ASC下游的排气管路中设置NO X传感器10、温度传感器30和PM传感器60。 As shown in Figure 2 is the layout of the engine aftertreatment system in the embodiment of the present application, the exhaust gas after the TC (turbine charger, turbocharger) is injected HC 20, two-way DOC+DPF, urea injection 50, two-way SCR +ASC (Ammonia Slip Catalyst, ammonia oxidation catalyst) and then discharged. A temperature sensor 30 is installed upstream of each DPF. In addition, a NOx sensor 10 and a temperature sensor 30 are installed on the exhaust pipeline upstream of the DOC. A differential pressure sensor 40 is installed in each DPF. The exhaust pipeline upstream of the SCR The temperature sensor 30 is installed in the middle, and the NOx sensor 10, the temperature sensor 30 and the PM sensor 60 are installed in the exhaust pipeline downstream of the ASC.
本申请实施例提出一种双DPF再生控制方法，具体过程如下：The embodiment of this application proposes a double DPF regeneration control method, the specific process is as follows:
假设其中一个温度传感器报出DPF上游温度传感器(1)可信性故障，用另外一个DPF上游温度传感器(2)的测量值进行再生温度控制，然后进行主动再生过程DPF(1)(2)内部测温。得出不同SCR上游温度情况下整个主动再生过程中再生峰值温度和最大温度梯度。Assuming that one of the temperature sensors reports a reliability failure of the DPF upstream temperature sensor (1), use the measurement value of the other DPF upstream temperature sensor (2) to control the regeneration temperature, and then carry out the active regeneration process inside the DPF (1) (2) temperature measurement. The regeneration peak temperature and maximum temperature gradient in the whole active regeneration process were obtained under different SCR upstream temperature conditions.
如图4所示为基于不同SCR上游温度修正的DPF再生控制方法逻辑图，根据废气质量流量和DOC上游温度查表得到DPF上游温度的设定基础值，增加不同SCR上游温度和碳载量，对DPF上游温度的设定基础值进行修正后得到DPF上游温度的设定值。Figure 4 shows the logic diagram of the DPF regeneration control method based on different SCR upstream temperature corrections. According to the exhaust gas mass flow rate and the DOC upstream temperature look-up table, the set basic value of the DPF upstream temperature is obtained, and different SCR upstream temperatures and carbon loads are added. The set value of the DPF upstream temperature is obtained after correcting the set base value of the DPF upstream temperature.
根据HC老化因子和DOC下游温度查表确定最大温度梯度的设定基础值，增加不同SCR上游温度对最大温度梯度的设定基础值进行修正后得到最大温度梯度的设定值。According to the HC aging factor and the DOC downstream temperature look-up table to determine the set base value of the maximum temperature gradient, adding different SCR upstream temperatures to correct the set base value of the maximum temperature gradient to obtain the set value of the maximum temperature gradient.
最后，在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度。Finally, during the active regeneration of the DPF, the regeneration peak temperature is controlled according to the set value of the upstream temperature of the DPF, and the maximum temperature gradient is controlled according to the set value of the maximum temperature gradient.
本方案根据SCR上游温度和DPF内部温度来控制修正再生过程中的DPF前设定温度和最大温度梯度，在实际环境使用中DPF再生过程温度控制更加安全，可以有效提高DPF使用可靠性。This solution controls and corrects the pre-set temperature and maximum temperature gradient of the DPF during the regeneration process according to the upstream temperature of the SCR and the internal temperature of the DPF. In the actual environment, the temperature control of the DPF regeneration process is safer and can effectively improve the reliability of the DPF.
本申请实施例还提出了一种双DPF再生控制装置，应用于包括双DPF的发动机后处理系统中，如图5所示，所述装置包括：The embodiment of the present application also proposes a dual DPF regeneration control device, which is applied to an engine aftertreatment system including a dual DPF, as shown in FIG. 5 , the device includes:
第一确定模块501，用于当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度；The first determination module 501 is used to determine the upstream temperature of the DPF based on the upstream temperature sensor of another DPF when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, and based on the multiple An internal temperature sensor determines the regeneration peak temperature and maximum temperature gradient in each DPF;
第二确定模块502，用于根据废气质量流量、DOC上游温度、SCR 上游温度和碳载量确定DPF上游温度的设定值；The second determination module 502 is used to determine the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load;
第三确定模块503，用于根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值；The third determination module 503 is used to determine the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR;
控制模块504，在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度。The control module 504 controls the regeneration peak temperature according to the set value of the upstream temperature of the DPF during active regeneration of the DPF, and controls the maximum temperature gradient according to the set value of the maximum temperature gradient.
在本申请具体的应用场景中，第二确定模块502，具体用于：In the specific application scenario of this application, the second determining module 502 is specifically used for:
根据废气质量流量和DOC上游温度查表得到DPF上游温度的设定基础值；According to the exhaust gas mass flow rate and the DOC upstream temperature look-up table, the set basic value of the DPF upstream temperature is obtained;
根据不同SCR上游温度和碳载量对DPF上游温度的设定基础值修正后确定DPF上游温度的设定值。The set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
在本申请具体的应用场景中，第三确定模块503，具体用于：In the specific application scenario of this application, the third determination module 503 is specifically used for:
根据HC老化因子和DOC下游温度查表确定最大温度梯度的设定基础值；Determine the set base value of the maximum temperature gradient according to the HC aging factor and the temperature look-up table downstream of the DOC;
根据不同SCR上游温度对最大温度梯度的设定基础值修正后确定最大温度梯度的设定值。The set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
在本申请具体的应用场景中，各所述内部温度传感器按轴向和径向在DPF中均匀分布。In a specific application scenario of the present application, the internal temperature sensors are evenly distributed in the DPF in the axial direction and radial direction.

Claims (9)

  1. 一种双DPF再生控制方法，应用于包括双DPF的发动机后处理系统中，所述方法包括：A double DPF regeneration control method, applied to an engine aftertreatment system including a double DPF, said method comprising:
    当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度；When it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, the upstream temperature of the DPF is determined based on the upstream temperature sensor of another DPF, and the internal temperature of each DPF is determined based on multiple internal temperature sensors in each DPF. regeneration peak temperature and maximum temperature gradient;
    根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值；Determine the set value of DPF upstream temperature according to exhaust gas mass flow rate, DOC upstream temperature, SCR upstream temperature and carbon load;
    根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值；Determine the setting value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR;
    在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度。During active regeneration of the DPF, the regeneration peak temperature is controlled according to the set value of the upstream temperature of the DPF, and the maximum temperature gradient is controlled according to the set value of the maximum temperature gradient.
  2. 如权利要求1所述的方法，其中，根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值，具体为：The method according to claim 1, wherein the set value of the DPF upstream temperature is determined according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load, specifically:
    根据废气质量流量和DOC上游温度查表得到DPF上游温度的设定基础值；According to the exhaust gas mass flow rate and the DOC upstream temperature look-up table, the set basic value of the DPF upstream temperature is obtained;
    根据不同SCR上游温度和碳载量对DPF上游温度的设定基础值修正后确定DPF上游温度的设定值。The set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
  3. 如权利要求1所述的方法，其中，根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值，具体为：The method according to claim 1, wherein the set value of the maximum temperature gradient is determined according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR, specifically:
    根据HC老化因子和DOC下游温度查表确定最大温度梯度的设定基础值；Determine the set base value of the maximum temperature gradient according to the HC aging factor and the temperature look-up table downstream of the DOC;
    根据不同SCR上游温度对最大温度梯度的设定基础值修正后确定最大温度梯度的设定值。The set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
  4. 如权利要求1所述的方法，其中，各所述内部温度传感器按轴向和径向在DPF中均匀分布。The method of claim 1, wherein each of said internal temperature sensors is uniformly distributed axially and radially in the DPF.
  5. 一种双DPF再生控制装置，应用于包括双DPF的发动机后处理系统中，所述装置包括：A double DPF regeneration control device is applied to an engine aftertreatment system including a double DPF, and the device includes:
    第一确定模块，设置为当检测各DPF处于主动再生模式且其中一个DPF的上游温度传感器报可信性故障时，基于另一个DPF的上游温度传感器确定DPF上游温度，以及基于各DPF中多个内部温度传感器确定各DPF中的再生峰值温度和最大温度梯度；The first determination module is configured to determine the upstream temperature of the DPF based on the upstream temperature sensor of another DPF when it is detected that each DPF is in the active regeneration mode and the upstream temperature sensor of one DPF reports a reliability failure, and based on multiple Internal temperature sensors determine regeneration peak temperature and maximum temperature gradient in each DPF;
    第二确定模块，设置为根据废气质量流量、DOC上游温度、SCR上游温度和碳载量确定DPF上游温度的设定值；The second determination module is configured to determine the set value of the DPF upstream temperature according to the exhaust gas mass flow rate, the DOC upstream temperature, the SCR upstream temperature and the carbon load;
    第三确定模块，设置为根据HC老化因子、DOC下游温度和SCR上游温度确定最大温度梯度的设定值；The third determination module is configured to determine the set value of the maximum temperature gradient according to the HC aging factor, the temperature downstream of the DOC and the temperature upstream of the SCR;
    控制模块，在DPF主动再生过程中，根据DPF上游温度的设定值控制再生峰值温度，以及根据最大温度梯度的设定值控制最大温度梯度。The control module controls the regeneration peak temperature according to the set value of the upstream temperature of the DPF during active regeneration of the DPF, and controls the maximum temperature gradient according to the set value of the maximum temperature gradient.
  6. 如权利要求5所述的装置，其中，所述第二确定模块，具体用于：The device according to claim 5, wherein the second determining module is specifically configured to:
    根据废气质量流量和DOC上游温度查表得到DPF上游温度的设定基础值；According to the exhaust gas mass flow rate and the DOC upstream temperature look-up table, the set basic value of the DPF upstream temperature is obtained;
    根据不同SCR上游温度和碳载量对DPF上游温度的设定基础值修正后确定DPF上游温度的设定值。The set value of the DPF upstream temperature is determined after correcting the set base value of the DPF upstream temperature according to different SCR upstream temperatures and carbon loads.
  7. 如权利要求5所述的装置，其中，所述第三确定模块，具体用于：The device according to claim 5, wherein the third determining module is specifically configured to:
    根据HC老化因子和DOC下游温度查表确定最大温度梯度的设定基础值；Determine the set base value of the maximum temperature gradient according to the HC aging factor and the temperature look-up table downstream of the DOC;
    根据不同SCR上游温度对最大温度梯度的设定基础值修正后确定最大温度梯度的设定值。The set value of the maximum temperature gradient is determined after being corrected according to the set base value of the maximum temperature gradient according to different SCR upstream temperatures.
  8. 如权利要求5所述的装置，其中，各所述内部温度传感器按轴向和径向在DPF中均匀分布。5. The apparatus of claim 5, wherein each of said internal temperature sensors is uniformly distributed axially and radially in the DPF.
  9. 一种发动机，包括如权利要求5-8任一项所述的双DPF再生控制装置。An engine, comprising the dual DPF regeneration control device according to any one of claims 5-8.
PCT/CN2023/071639 2022-01-11 2023-01-10 Double-dpf regeneration control method and apparatus, and engine WO2023134683A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118008541A (en) * 2024-04-08 2024-05-10 潍柴动力股份有限公司 Regeneration control method and aftertreatment system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114046198B (en) * 2022-01-11 2022-03-15 潍柴动力股份有限公司 Double DPF regeneration control method and device and engine
CN114934835A (en) * 2022-02-23 2022-08-23 上海和夏骏智科技有限公司 DPF efficiency monitoring structure and DPF efficiency monitoring method
CN114486270B (en) * 2022-04-15 2022-08-05 潍柴动力股份有限公司 Method, device, vehicle and medium for detecting uniformity of multiple DOCs
CN114922719B (en) * 2022-05-10 2024-02-20 潍柴动力股份有限公司 Control method, device and computer readable storage medium for SCR reactor temperature
CN116146317B (en) * 2023-04-20 2023-08-18 潍柴动力股份有限公司 DPF regeneration uniformity control method and device, electronic equipment and storage medium

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101300059A (en) * 2005-09-01 2008-11-05 通用汽车环球科技运作公司 Exhaust particulate filter
WO2017056800A1 (en) * 2015-09-28 2017-04-06 株式会社豊田自動織機 Exhaust purifier
CN107747505A (en) * 2017-08-16 2018-03-02 江苏大学 A kind of system and control method that DPF is alternately regenerated using engine exhaust
CN107831089A (en) * 2017-09-27 2018-03-23 无锡威孚力达催化净化器有限责任公司 A kind of maximum safe carbon carrying capacity experimental rigs of DPF and its method of testing
CN110242390A (en) * 2019-05-09 2019-09-17 上海交通大学 The regeneration temperature control method and system of diesel particulate filter device
CN111365099A (en) * 2020-03-31 2020-07-03 凯龙高科技股份有限公司 Idling condition combustor DPF regeneration control system based on parking warm-up
CN114046198A (en) * 2022-01-11 2022-02-15 潍柴动力股份有限公司 Double DPF regeneration control method and device and engine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08170522A (en) * 1994-12-19 1996-07-02 Matsushita Electric Ind Co Ltd Diesel engine exhaust gas emission control device
US8061128B2 (en) * 2008-05-15 2011-11-22 Ford Global Technologies, Llc Diesel particulate filter overstress mitigation
US8240136B2 (en) * 2009-07-29 2012-08-14 Ford Global Technologies, Llc SCR catalyst heating control
JP2012102684A (en) * 2010-11-11 2012-05-31 Ud Trucks Corp Exhaust emission control device for engine
JP6087580B2 (en) * 2012-10-30 2017-03-01 三菱重工業株式会社 Exhaust purification device for internal combustion engine and exhaust purification method thereof
JP6135198B2 (en) * 2013-03-07 2017-05-31 いすゞ自動車株式会社 Control method of exhaust gas aftertreatment device
US10107168B2 (en) * 2016-10-26 2018-10-23 GM Global Technology Operations LLC Method and apparatus to control regeneration of a particulate filter of an exhaust gas feedstream
CN106948908B (en) * 2017-03-24 2019-05-28 潍柴动力股份有限公司 A kind of vanadium base SCR active regeneration system control method and control device
CN110410180B (en) * 2018-04-26 2023-04-28 罗伯特·博世有限公司 Active regeneration process control method and system, readable storage medium and control unit
CN109209585B (en) * 2018-11-09 2020-06-02 潍柴动力股份有限公司 DPF regeneration control method, device and system
CN110671177B (en) * 2019-12-04 2020-03-17 潍柴动力股份有限公司 DPF regeneration method and device
CN112943416B (en) * 2021-04-28 2022-10-25 潍柴动力股份有限公司 DPF active regeneration control method and particle catcher

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101300059A (en) * 2005-09-01 2008-11-05 通用汽车环球科技运作公司 Exhaust particulate filter
WO2017056800A1 (en) * 2015-09-28 2017-04-06 株式会社豊田自動織機 Exhaust purifier
CN107747505A (en) * 2017-08-16 2018-03-02 江苏大学 A kind of system and control method that DPF is alternately regenerated using engine exhaust
CN107831089A (en) * 2017-09-27 2018-03-23 无锡威孚力达催化净化器有限责任公司 A kind of maximum safe carbon carrying capacity experimental rigs of DPF and its method of testing
CN110242390A (en) * 2019-05-09 2019-09-17 上海交通大学 The regeneration temperature control method and system of diesel particulate filter device
CN111365099A (en) * 2020-03-31 2020-07-03 凯龙高科技股份有限公司 Idling condition combustor DPF regeneration control system based on parking warm-up
CN114046198A (en) * 2022-01-11 2022-02-15 潍柴动力股份有限公司 Double DPF regeneration control method and device and engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118008541A (en) * 2024-04-08 2024-05-10 潍柴动力股份有限公司 Regeneration control method and aftertreatment system

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