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WO2006117357A1 - Dispositif et procede pour faire fonctionner un capteur de mesure de gaz, notamment une sonde lambda - Google Patents

Dispositif et procede pour faire fonctionner un capteur de mesure de gaz, notamment une sonde lambda Download PDF

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Publication number
WO2006117357A1
WO2006117357A1 PCT/EP2006/061953 EP2006061953W WO2006117357A1 WO 2006117357 A1 WO2006117357 A1 WO 2006117357A1 EP 2006061953 W EP2006061953 W EP 2006061953W WO 2006117357 A1 WO2006117357 A1 WO 2006117357A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
temperature
heating
operating
internal combustion
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.)
Ceased
Application number
PCT/EP2006/061953
Other languages
German (de)
English (en)
Inventor
Stefan Rodewald
Frank Kowol
Cyril Verdier
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP06754941A priority Critical patent/EP1880200A1/fr
Priority to JP2008509427A priority patent/JP2008541030A/ja
Publication of WO2006117357A1 publication Critical patent/WO2006117357A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/4067—Means for heating or controlling the temperature of the solid electrolyte
    • 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
    • F02D41/1493—Details
    • F02D41/1494—Control of sensor heater

Definitions

  • the invention relates to a method for operating a sensor for gases, in particular a lambda probe according to the preamble of the independent claim. Furthermore, the invention relates to an apparatus for operating such a sensor.
  • a sensor for gases is already known, in which after a start of an internal combustion engine to avoid thermal shock of the ceramic by condensed water, first a protective tube of the probe at a temperature in the vicinity of the evaporation temperature of water between 80 ° until 150 0 C is brought. This procedure ensures that all water evaporates at the installation site of the probe in order to avoid possible deposits on the ceramic element of the probe. After a certain residence time in this so-called protective heating mode, the sensor is set to its operating temperature of, for example. 300 ° to 450 ° C or even heated above. For typical lambda probes, the operating temperature or readiness of the probe is reached from approx. 15 seconds after engine start.
  • the inventive method with the features of the independent claim has the advantage that the sensor is heated before a start of the internal combustion engine. This switch-on strategy significantly shortens the time until the sensor is ready for operation after an engine start. Compliance with the limits for modern emission standards such. As EU4 / ULEV or SULEV concepts is thus much easier. Furthermore, the thermo-mechanical robustness is increased. Furthermore, it is advantageous to heat the sensor only up to a first temperature, wherein furthermore the first temperature is to be selected maximally so that the sensor does not suffer a thermal shock.
  • the first temperature is set so that the protective tube and the ceramic of the sensor in the exhaust system is above a dew point, so that the risk of accumulation of condensation in the protective tube and the associated risk of thermal shock is drastically reduced.
  • Conditions such as Temperature sensor or exhaust system, shutdown time, battery voltage, etc. can be adjusted.
  • An expedient embodiment provides that the temperature rise of the probe is set via a variable heating voltage. So can advantageously the
  • Temperature gradient adjusted so that first the dew point temperature is reached in a very short time and in the further course of the temperature rise may be flatter, whereby the risk of thermal shock can be further reduced.
  • Heating voltage and then a second heating voltage is heated to the first temperature, wherein in a further advantageous embodiment, the first heating voltage is higher than the second.
  • This approach has the advantage that alone by varying the heating voltages, an advantageous increase in temperature can be realized.
  • a first high heating voltage a temperature can first be advantageously reached at which water present can evaporate without the probe suffering a temperature shock.
  • it is provided according to the invention, with a second heating voltage, which is lower than the first heating voltage, to realize a flatter temperature rise, in order thus to reach the first temperature, without mechanical or thermal stresses causing the sensor endanger.
  • the thermo-mechanical robustness of the probe is increased since, in contrast to the methods known from the prior art, lower heating gradients occur in the probe.
  • the heating of the sensor is triggered by a wake-up function of a control device.
  • the triggering can be triggered by activation of a door contact, a heater, a seat contact and / or other controls.
  • the activation of these user elements is either registered by the control unit as a user event and triggers a so-called wake-up function of the control unit, via which in turn the
  • Sensor is caused to heat up or the user elements is designed such that an activation acts directly on the probe and causes a heating.
  • FIG. 1 is a schematic diagram of a device according to the invention.
  • FIG. 2 shows a temperature profile of a measuring sensor according to the invention and a temperature profile known from the prior art.
  • the invention aims to preheat a sensor, in particular a lambda probe, before an engine start in order to reach an operating temperature as quickly as possible after starting the engine and thus a control capability of the sensor.
  • a sensor in particular a lambda probe
  • it is provided to bring the probe and in particular the ceramic of the probe to a first temperature of about 80 ° C to about 300 ° C.
  • These temperatures do not lead to a thermal shock in the presence of water, but significantly facilitate the further heating of the probe.
  • an optionally existing protective tube of the probe is warmed up to the extent that existing condensate evaporates, - A -
  • Figure 1 shows an example of a possible embodiment of the invention.
  • it is provided to control the lambda probe 10 both directly via a control unit 30 or to supply it with voltages or currents, as well as indirectly via an output stage 20, in which case the output stage 20 is controlled by the control unit 30.
  • the controller 30 also receives user events 40 and, in response to these user events, controls the lambda probe 10 either directly or indirectly via the power amplifier 20. It may also be contemplated that certain events of the user may occur directly, i. without adding the control unit, act on the sensor and cause the sensor to heat up.
  • Control units with a so-called wake-up function are capable of external events even in a switched-off state of the internal combustion engine, and in particular
  • control unit may activate at least the control of the measuring sensor by activating certain operating elements.
  • certain operating elements For example, it may be provided to start the preheating procedure by activating a door contact as soon as a driver opens the car door by radio remote control or by a car key.
  • the preheating procedure can also be activated by activating the auxiliary heating via radio or timer.
  • a seat contact which is activated, for example, as soon as the driver sits down on the driver's seat. Further activation options via further operating elements are conceivable.
  • FIG. 2 shows by way of example a temporal temperature profile of a measuring sensor known from the prior art in a curve 100 and a temperature profile 200 according to the invention.
  • the heating of the measuring probe does not become a starting time until or after the starting of the internal combustion engine t_S turned on, so that an operating temperature t_B typically only after about 15 s after the engine start is reached.
  • the curve 200 shows an example of a heating with variable heating voltage. At event time t_E is first by applying a first high
  • Heating voltage a steep temperature gradient shown to heat the probe as quickly as possible.
  • the temperature hereby preferably remains below a first temperature in order to avoid thermal shocks at the sensor.
  • a second heating voltage is applied, which slows down the heating of the sensor.
  • the second heating voltage is smaller than the first heating voltage.
  • the second heating voltage may be selected, for example, so that the first temperature is reached asymptotically.
  • the sensor is already preheated to the first temperature, so that the heating up to operating temperature t_B takes place within a short time, and thus the operational readiness and controllability of the sensor is much faster in time available than with a conventionally operated sensor.
  • the heating can also be carried out by a control or regulation and so individually adapted to the prevailing conditions.
  • provision may also be made for hot start conditions.
  • Hot start conditions are usually present when an internal combustion engine has reached its operating temperature only for a short time.
  • the exhaust system so that it can be assumed in a restart of the internal combustion engine that the exhaust system is free of condensate.
  • it can be considered as a hot start condition, if the wall of the exhaust line before the installation of the probe heats up sufficiently quickly at the start of the internal combustion engine, so that only small amounts of water (wall film) are formed by condensation; o- if it is ensured by design measures that a possibly resulting wall film can not be atomized by the exhaust gas flow of the internal combustion engine, so that drops of water can not hit the sensor; or if it is ensured by design measures that no water reservoirs (eg siphons) can occur in front of the probe installation site.
  • no water reservoirs eg siphons
  • the probe it is conceivable to heat the probe not only to a first temperature T l, but to the operating temperature TB.
  • Such heating up to the operating temperature before a start can take place, for example, when the exhaust gas system has a sufficiently high temperature due to a short shutdown time of the internal combustion engine, so that it can be assumed that there is no condensation water in the exhaust gas line.
  • it may also be provided to determine further operating variables of the vehicle and to heat the measuring sensor as a function of the determined operating variables. For example, can completely be omitted or shortened at a low battery voltage on the preheating.
  • certain heating or preheating strategies can be defined.
  • the preheating strategy according to the invention leads to a rapid operational readiness of the sensor or of the lambda probe after engine start.
  • the heating voltage is applied via a pulse
  • the temperature of the measuring sensor is measured directly and a preheating phase is activated according to the detected temperature at the measuring sensor.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • Pathology (AREA)
  • Molecular Biology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un dispositif et un procédé pour faire fonctionner un capteur de mesure de gaz, notamment une sonde lambda, qui présente un dispositif de chauffage permettant de le chauffer avant un démarrage d'un moteur à combustion interne.
PCT/EP2006/061953 2005-05-02 2006-05-02 Dispositif et procede pour faire fonctionner un capteur de mesure de gaz, notamment une sonde lambda Ceased WO2006117357A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06754941A EP1880200A1 (fr) 2005-05-02 2006-05-02 Dispositif et procede pour faire fonctionner un capteur de mesure de gaz, notamment une sonde lambda
JP2008509427A JP2008541030A (ja) 2005-05-02 2006-05-02 ガス用の測定センサの作動方法および装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005020363.9 2005-05-02
DE102005020363A DE102005020363A1 (de) 2005-05-02 2005-05-02 Vorrichtung und Verfahren zum Betreiben eines Messfühlers für Gase, insbesondere einer Lambdasonde

Publications (1)

Publication Number Publication Date
WO2006117357A1 true WO2006117357A1 (fr) 2006-11-09

Family

ID=36603516

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/061953 Ceased WO2006117357A1 (fr) 2005-05-02 2006-05-02 Dispositif et procede pour faire fonctionner un capteur de mesure de gaz, notamment une sonde lambda

Country Status (5)

Country Link
EP (1) EP1880200A1 (fr)
JP (1) JP2008541030A (fr)
CN (1) CN101171510A (fr)
DE (1) DE102005020363A1 (fr)
WO (1) WO2006117357A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009054127A1 (de) 2009-11-20 2011-05-26 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Aktivieren der Heizung einer Lambda-Sonde in einer Abgasanlage mit einem über das Abgas heizbaren Katalysator
CN106257025A (zh) * 2015-06-18 2016-12-28 现代自动车株式会社 氧传感器加热器控制系统及其方法
US10548186B2 (en) 2012-03-05 2020-01-28 Volkswagen Aktiengesellschaft Method for controlling a heating device for heating a component, control device and motor vehicle with same
EP4112899A1 (fr) * 2021-07-02 2023-01-04 Volvo Truck Corporation Commande du contrôle des émissions de nox pendant le démarrage d'un véhicule

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013515A1 (de) * 2008-03-07 2009-09-10 Volkswagen Ag Verfahren zum Betreiben einer Lambdasonde während der Aufwärmphase
DE102009055041B4 (de) * 2009-12-21 2021-12-09 Robert Bosch Gmbh Verfahren zum schnellen Erreichen der Betriebsbereitschaft einer beheizbaren Abgassonde
DE102010039872A1 (de) * 2010-08-27 2012-03-01 Robert Bosch Gmbh Steuerungschip und Steuergerät zur Steuerung eines Verbrennungsmotors eines Fahrzeugs
DE102011002856A1 (de) 2011-01-19 2012-07-19 Robert Bosch Gmbh Verfahren zur Erfassung mindestens eines Parameters eines Gases
KR101214221B1 (ko) 2011-04-22 2012-12-20 주식회사 현대케피코 산소센서, 그 제어 장치 및 그 제어 방법
DE102011119214A1 (de) * 2011-11-23 2013-05-23 Daimler Ag Verfahren zum Bestimmen einer Umsetzfähigkeit einer Abgasnachbehandlungseinrichtung für ein Fahrzeug
CN105980843B (zh) * 2014-02-12 2019-01-01 霍尼韦尔国际公司 具有抵抗因冷凝引起的信号损失的结构的气体传感器
JP6406311B2 (ja) * 2016-05-09 2018-10-17 トヨタ自動車株式会社 排気センサの制御装置
DE102019220584A1 (de) * 2019-08-19 2021-02-25 Robert Bosch Gmbh Verfahren zum Betreiben eines Abgassensors
DE102024102105A1 (de) * 2024-01-25 2025-07-31 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Aktivieren einer Aufstartfunktion und Steuerungsvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4033667A1 (de) * 1989-10-25 1991-05-02 Ngk Insulators Ltd Sauerstoffsensor
DE10015282A1 (de) * 1999-03-29 2000-11-02 Toyota Motor Co Ltd Sauerstoffkonzentrationserfassungseinrichtung und Verfahren zum verwenden derselben
DE10163912A1 (de) * 2001-04-05 2003-02-06 Bosch Gmbh Robert Gassensor, insbesondere Lambda-Sonde

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019067A1 (de) * 1990-06-15 1991-12-19 Bosch Gmbh Robert Einrichtung zum einschalten einer abgassondenheizung
JP3104362B2 (ja) * 1992-01-27 2000-10-30 株式会社デンソー 内燃機関の空燃比制御装置
DE4223954C1 (de) * 1992-07-21 1994-01-13 Bosch Gmbh Robert Vorrichtung zum Steuern eines Heizelements in einem Kraftfahrzeug
DE10052005C2 (de) * 2000-10-20 2002-11-21 Bosch Gmbh Robert Meßfühler für Gase
JP3824984B2 (ja) * 2002-09-06 2006-09-20 三菱電機株式会社 排気ガスセンサの温度制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4033667A1 (de) * 1989-10-25 1991-05-02 Ngk Insulators Ltd Sauerstoffsensor
DE10015282A1 (de) * 1999-03-29 2000-11-02 Toyota Motor Co Ltd Sauerstoffkonzentrationserfassungseinrichtung und Verfahren zum verwenden derselben
DE10163912A1 (de) * 2001-04-05 2003-02-06 Bosch Gmbh Robert Gassensor, insbesondere Lambda-Sonde

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009054127A1 (de) 2009-11-20 2011-05-26 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Aktivieren der Heizung einer Lambda-Sonde in einer Abgasanlage mit einem über das Abgas heizbaren Katalysator
DE102009054127B4 (de) 2009-11-20 2021-11-25 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Aktivieren der Heizung einer Lambda-Sonde in einer Abgasanlage mit einem über das Abgas heizbaren Katalysator
US10548186B2 (en) 2012-03-05 2020-01-28 Volkswagen Aktiengesellschaft Method for controlling a heating device for heating a component, control device and motor vehicle with same
CN106257025A (zh) * 2015-06-18 2016-12-28 现代自动车株式会社 氧传感器加热器控制系统及其方法
CN106257025B (zh) * 2015-06-18 2021-04-13 现代自动车株式会社 氧传感器加热器控制系统及其方法
EP4112899A1 (fr) * 2021-07-02 2023-01-04 Volvo Truck Corporation Commande du contrôle des émissions de nox pendant le démarrage d'un véhicule
US11686237B2 (en) 2021-07-02 2023-06-27 Volvo Truck Corporation Controlling NOx emission control during start of a vehicle

Also Published As

Publication number Publication date
CN101171510A (zh) 2008-04-30
EP1880200A1 (fr) 2008-01-23
DE102005020363A1 (de) 2006-11-16
JP2008541030A (ja) 2008-11-20

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