CN108368791A - 用于测试柴油发动机的湿度传感器的方法 - Google Patents

用于测试柴油发动机的湿度传感器的方法 Download PDF

Info

Publication number
CN108368791A
CN108368791A CN201680072445.8A CN201680072445A CN108368791A CN 108368791 A CN108368791 A CN 108368791A CN 201680072445 A CN201680072445 A CN 201680072445A CN 108368791 A CN108368791 A CN 108368791A
Authority
CN
China
Prior art keywords
diesel engine
humidity sensor
value
nox
air inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201680072445.8A
Other languages
English (en)
Other versions
CN108368791B (zh
Inventor
张宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitesco Technologies GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of CN108368791A publication Critical patent/CN108368791A/zh
Application granted granted Critical
Publication of CN108368791B publication Critical patent/CN108368791B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/144—Sensor in intake manifold
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
    • F02D41/1462—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine with determination means using an estimation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/006—Indicating maintenance
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0418—Air humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Testing Of Engines (AREA)

Abstract

本发明描述了用于测试柴油发动机的湿度传感器的方法。在该方法中，借助于NOx传感器在限定的窗口中在特定的稳态操作点处测量SCR催化转化器上游的柴油发动机的排气中的未处理的NOx排放物含量。此外，确定柴油发动机的进气中的氧气浓度，并且借助于特性曲线将获得的结果转换成NOx浓度。这两个值相互比较。如果在这些值之间检测到超过设定值的偏差，则故障湿度传感器被识别。

Description

用于测试柴油发动机的湿度传感器的方法
技术领域
本发明涉及一种用于测试柴油发动机的机湿度传感器的方法。
背景技术
在用于使柴油发动机的排放行为受控的手段中有湿度传感器，借助于湿度传感器测量柴油发动机的进气管中的湿度。 表示测得的湿度的对应信号能够被馈送至柴油发动机的控制装置，该控制装置能够据此控制柴油发动机或其排气系统的对应操作参数。
由于在40℃的温度下80％的相对空气湿度的偏差已经导致例如1.3％（绝对）的O 2浓度的变化，所以这导致NOx排放物的变化超过50％。因此，这种类型的湿度传感器正确地操作是相当重要的。
DE 10 2004 043 933 A1公开了一种机动车辆的内燃机的排气系统，该排气系统具有布置在排气管线中的排气催化转化器以及暴露于内燃机的排气并且监测该排气系统的传感器。该传感器是湿度传感器。
DE 10 2008 036 418 B4公开了一种用于控制内燃机的排气后处理系统的方法，在该排气后处理系统的排气管道中布置有SCR催化转化器。在该方法中，在内燃机的SCR催化转化器上游的排气道中的排气的水含量的特性变量被确定，并且根据该排气的水含量的特性变量确定催化转化器温度，以便获得用于将氨引入排气中的最终控制元件的致动信号。在该情况中，湿度传感器布置在内燃机的进气管道中，所述传感器在那里测量进气的空气湿度。
发明内容
本发明的基本目标是提出一种方法，借助于该方法能够以简单的方式测试柴油发动机的湿度传感器的操作。
根据本发明，所述目标通过一种用于测试柴油发动机的湿度传感器的方法来实现，该方法包括以下步骤：
借助于NOx传感器在限定窗口中在特定的稳态操作点处测量SCR催化转化器上游的柴油发动机的排气中的未处理的NOx排放物含量，以便获得实际值（ACTUAL值）;
确定柴油发动机的进气中的氧气浓度，并且借助于特性曲线将得到的结果转换成NOx浓度以便获得模型值;
将实际值与模型值进行比较;以及
如果在这些值之间检测到超过设定值的偏差，则故障湿度传感器被识别。
根据本发明的方法基于下述基本概念：借助于SCR催化转化器上游的NOx传感器信号检查湿度传感器信号的合理性。在此，选择特定的稳态操作点以用于评估NOx传感器信号。
另一方面，柴油发动机的进气中的氧气浓度被确定并且借助于特性曲线被转换成NOx浓度。然后将该计算出的NOx浓度作为模型值与SCR催化转化器上游的来自NOx传感器的NOx信号（实际值）进行比较。如果在这些值之间检测到超过设定值的偏差，则故障湿度传感器被识别。否则，如果在这些值之间没有偏差或者只有未超过设定值的偏差，则正确操作的湿度传感器被识别。
作为本发明的改进例，通过测量空气质量、EGR质量（如果可用）以及柴油发动机的进气管中的湿度来确定进气中的氧气浓度。在此，“EGR质量”是指再循环以减少氮氧化物排放的排气质量。
“SCR催化转化器”是指执行选择性催化还原以减少排气中的氮氧化物的催化转化器。在此，SCR催化转化器上的化学反应是选择性的，即，存在氮氧化物的优先还原，而不希望的副反应很大程度上被抑制。
特别地，根据本发明的方法被执行以使得如果在高环境温度下检测到这些值（实际值和模型值）之间的大偏差，则故障湿度传感器被识别。在此，高环境温度例如对应于超过35℃的值。
在根据本发明执行的比较期间，NOx信号和湿度信号（用于计算氧浓度）应当保持近似恒定。
为了提高诊断的可靠性，在本发明的另一个实施例中，例如，用在相关操作点处并且在例如低于20℃的低环境温度下测得的实际值来调整所计算的模型值。
发动机速度和负载的操作点优选地被选择为特定的稳态操作点。
附图说明
下面结合附图参照示例性实施例详细解释本发明。在附图中：
图1示出了具有控制单元的柴油发动机的示意图;以及
图2示出了各个方法步骤的流程图。
具体实施方式
仅在图1中示意性地示出的柴油发动机具有带有进气管道的发动机缸体1，该进气管道具有进气管2。另外，柴油发动机具有带有排气管3的排气管道，其中设置有SCR催化转化器4（SCR表示选择性催化还原）。在SCR催化转化器4的上游具有NOx传感器5，借助于该传感器测量排气中未处理的NOx排放物含量。
示意性示出的排气再循环系统（EGR表示排气再循环）由标记7表示。因此，一些排气被再循环到进气管2中，并且在那里与吸入的空气混合。
在根据本发明的方法中，在SCR催化转化器4上游的柴油发动机的排气中的NOx含量一方面现在借助于NOx传感器在特定的稳态操作点（发动机转速、负载）处被测量。对应的信号被馈送到由标记9示意性地示出的控制单元。
另一方面，两个传感器8用于测量进气管2中的空气质量以及EGR质量（再循环排气的质量）。而且，借助于湿度传感器6测量进气管2中的空气湿度。三个传感器的信号同样地被馈送到控制单元9。
通过传感器8和6的信号，控制单元9借助于存储在所述单元中的特性曲线来确定NOx浓度，该浓度作为模型值被引入该方法中。该模型值与作为实际值的由传感器5测量的NOx含量进行比较。如果控制单元检测到超过设定值的这些值之间的偏差，则故障湿度传感器6被识别，并且例如借助于合适的指示器来指示。否则，湿度传感器6被归类为正确地操作。
更具体地，如果在高环境温度（例如，40℃）下检测到这些值之间的大的偏差，则在此过程中故障湿度传感器被识别。例如，借助于提供的指示器，控制相关车辆的人员接收到需要更换湿度传感器的指示。
图2在框图中示出了该方法的各个步骤。在步骤10中，借助于NOx传感器测量柴油发动机的排气中的NOx含量，更具体地在发动机转速和负载的稳态操作点处进行测量。对应的信号被馈送到控制单元，并且在那里作为实际值可用（步骤12）。
此外，EGR质量和进气管中的空气质量以及进气管中的水分含量被测量（步骤11）。对应的信号被馈送到控制单元。由此，在步骤13中确定进气管中的氧气浓度，并且由此使用存储的特性曲线计算NOx浓度作为模型值（步骤13）。
根据步骤14，这两个值相互比较。根据步骤15，确定偏差是否大于设定值（R），其中，以高环境温度为基础。然后将对应的湿度传感器归类为故障或者非故障。

Claims (6)

1.一种用于测试柴油发动机的湿度传感器（6）的方法，所述方法包括以下步骤：
借助于NOx传感器（5）在限定窗口中在特定的稳态操作点处测量选择性催化还原（SCR）催化转化器（4）上游的柴油发动机的排气中的未处理的NOx排放物含量，以便获得实际值；
确定柴油发动机的进气中的氧气浓度，并且借助于特性曲线将获得的结果转换成NOx浓度，以便获得模型值；
将实际值与模型值进行比较；以及
如果在这些值之间检测到超过设定值（R）的偏差，则故障湿度传感器（6）被识别。
2.根据权利要求1所述的方法，其特征在于，通过测量空气质量、在可用的情况下测量再循环排气（EGR）质量、以及测量所述柴油发动机的进气管（2）中的湿度来确定所述进气中的所述氧气浓度。
3.根据权利要求1或2所述的方法，其特征在于，如果在高环境温度下检测到所述值之间的大的偏差，则故障湿度传感器（6）被识别。
4.根据权利要求3所述的方法，其特征在于，高环境温度对应于超过35℃的值。
5.根据前述权利要求中任一项所述的方法，其特征在于，用在相关操作点处并且在低环境温度下测得的实际值来调整所计算的模型值。
6.根据前述权利要求中任一项所述的方法，其特征在于，发动机转速和负载的操作点被选择为特定的稳态操作点。
CN201680072445.8A 2015-12-11 2016-11-15 用于测试柴油发动机的湿度传感器的方法 Active CN108368791B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015224929.8A DE102015224929B4 (de) 2015-12-11 2015-12-11 Verfahren zur Überprüfung eines Feuchtigkeitssensors eines Dieselmotors
DE102015224929.8 2015-12-11
PCT/EP2016/077649 WO2017097543A1 (de) 2015-12-11 2016-11-15 Verfahren zur überprüfung eines feuchtigkeitssensors eines dieselmotors

Publications (2)

Publication Number Publication Date
CN108368791A true CN108368791A (zh) 2018-08-03
CN108368791B CN108368791B (zh) 2020-12-08

Family

ID=57288447

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201680072445.8A Active CN108368791B (zh) 2015-12-11 2016-11-15 用于测试柴油发动机的湿度传感器的方法

Country Status (5)

Country Link
US (1) US10465626B2 (zh)
EP (1) EP3387240A1 (zh)
CN (1) CN108368791B (zh)
DE (1) DE102015224929B4 (zh)
WO (1) WO2017097543A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112114009A (zh) * 2019-12-17 2020-12-22 南通大学 一种具备自我诊断功能的湿度传感器芯片及湿度传感器芯片的自我诊断方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016201354B4 (de) 2016-01-29 2017-08-10 Continental Automotive Gmbh Verfahren zur Überprüfung eines Feuchtigkeitssensors

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1077375A1 (en) * 1997-03-21 2001-02-21 Ngk Spark Plug Co., Ltd Method and apparatus for measuring NOx gas concentration
EP1288455A1 (en) * 2001-09-03 2003-03-05 Honda Giken Kogyo Kabushiki Kaisha State determining apparatus for humidity sensor
US20030106304A1 (en) * 2001-12-06 2003-06-12 Honda Giken Kogyo Kabushiki Kaisha Method of detecting failure of humidity sensor
CN102678392A (zh) * 2011-03-10 2012-09-19 福特环球技术公司 用于湿度传感器诊断的方法和系统
CN102939452A (zh) * 2010-05-06 2013-02-20 Fpt发动机研究公司 使用燃烧发动机中其它传感器例如NOX传感器、λ传感器和/或氧气传感器的氧气测量结果来监测该发动机中湿度传感器的方法和装置
CN104005859A (zh) * 2013-02-22 2014-08-27 福特环球技术公司 湿度传感器诊断
CN104101625A (zh) * 2013-04-05 2014-10-15 福特环球技术公司 使用防冷凝加热器的湿度传感器诊断方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5735245A (en) * 1996-10-22 1998-04-07 Southwest Research Institute Method and apparatus for controlling fuel/air mixture in a lean burn engine
US6564563B2 (en) * 2001-06-29 2003-05-20 International Business Machines Corporation Logic module refrigeration system with condensation control
DE10312440B4 (de) * 2003-03-20 2006-04-06 Siemens Ag Abgasreinigungsverfahren für Magerbrennkraftmaschinen
DE102004043933A1 (de) 2004-09-11 2006-03-30 Daimlerchrysler Ag Abgassystem eines Kraftfahrzeugs und Verfahren zur Überwachung des Abgassystems
US8315759B2 (en) * 2008-04-04 2012-11-20 GM Global Technology Operations LLC Humidity sensor diagnostic systems and methods
DE102008036418B4 (de) 2008-08-05 2010-04-29 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern einer Abgasnachbehandlung
US9382861B2 (en) 2013-02-22 2016-07-05 Ford Global Technologies, Llc Humidity Sensor Diagnostics
US9618470B2 (en) * 2013-04-18 2017-04-11 Ford Global Technologies, Llc Humidity sensor and engine system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1077375A1 (en) * 1997-03-21 2001-02-21 Ngk Spark Plug Co., Ltd Method and apparatus for measuring NOx gas concentration
EP1288455A1 (en) * 2001-09-03 2003-03-05 Honda Giken Kogyo Kabushiki Kaisha State determining apparatus for humidity sensor
US20030106304A1 (en) * 2001-12-06 2003-06-12 Honda Giken Kogyo Kabushiki Kaisha Method of detecting failure of humidity sensor
CN102939452A (zh) * 2010-05-06 2013-02-20 Fpt发动机研究公司 使用燃烧发动机中其它传感器例如NOX传感器、λ传感器和/或氧气传感器的氧气测量结果来监测该发动机中湿度传感器的方法和装置
CN102678392A (zh) * 2011-03-10 2012-09-19 福特环球技术公司 用于湿度传感器诊断的方法和系统
CN104005859A (zh) * 2013-02-22 2014-08-27 福特环球技术公司 湿度传感器诊断
CN104101625A (zh) * 2013-04-05 2014-10-15 福特环球技术公司 使用防冷凝加热器的湿度传感器诊断方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112114009A (zh) * 2019-12-17 2020-12-22 南通大学 一种具备自我诊断功能的湿度传感器芯片及湿度传感器芯片的自我诊断方法

Also Published As

Publication number Publication date
WO2017097543A1 (de) 2017-06-15
DE102015224929B4 (de) 2017-08-10
DE102015224929A1 (de) 2017-06-14
US10465626B2 (en) 2019-11-05
EP3387240A1 (de) 2018-10-17
CN108368791B (zh) 2020-12-08
US20180363583A1 (en) 2018-12-20

Similar Documents

Publication Publication Date Title
US11428143B2 (en) Method for operating an internal combustion engine
EP3255257B1 (en) Internal combustion engine and exhaust-gas-component estimating method
CN111263848B (zh) 用于操作柴油发动机的废气后处理系统的方法和废气后处理系统
US9556766B2 (en) Method and device for operating an internal combustion engine
KR101574499B1 (ko) 내연 기관용 ｎｏｘ 센서의 진단 방법 및 장치
US9772273B2 (en) Method and device for monitoring a humidity sensor in a combustion engine, using oxygen measurement of other sensors in the engine, such as NOx, lambda and/or oxygen sensors
US6438947B2 (en) Method for adapting a raw NOx concentration value of an internal combustion engine operating with an excess of air
MX2015001896A (es) Metodo de diagnostico de sensores de gases de escape.
CN109931129B (zh) 用于监测内燃机的排气后处理系统的方法和装置
US10161329B2 (en) Upstream NOx estimation
CN104343512A (zh) 用于确定排气净化装置的效率的方法和设备
US9127585B2 (en) Catalyst temperature estimating device and catalyst temperature estimating method
US20140030810A1 (en) Method for the dynamic detection of leakages for scr catalytic converters
CN107542561A (zh) 用于对废气净化设备中的二次空气供给机构的功能进行控制和/或监控的方法和装置
CN108368791A (zh) 用于测试柴油发动机的湿度传感器的方法
RU2016129694A (ru) Выявление и количественное определение утечек аммиака после системы избирательного каталитического восстановления оксидов азота
US10094265B2 (en) Method for monitoring the formation of nitrogen dioxide at an oxidation catalytic converter, and exhaust system
CN101839163B (zh) 微粒过滤器温度校正系统和方法
CN113884307A (zh) 进气流量传感器准确性检测方法及系统
US8171780B2 (en) Method and device for estimating an emission of at least one exhaust gas component
EP2474728B1 (en) Egr control system for internal combustion engine
US8554444B2 (en) Method for operating an internal combustion engine
US10408807B2 (en) Method for determining the NH3 loading of an SCR catalytic converter
US20170044962A1 (en) Determining the conversion efficiency of an exhaust gas catalytic converter
KR20110116581A (ko) 공연비 제어 시스템 및 그 방법

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20230523

Address after: Regensburg, Germany

Patentee after: WeiPai Technology Co.,Ltd.

Address before: Hannover

Patentee before: CONTINENTAL AUTOMOTIVE GmbH