WO2013020821A1 - Vorrichtung zum betreiben einer heizeinrichtung eines gassensors, verfahren - Google Patents
Vorrichtung zum betreiben einer heizeinrichtung eines gassensors, verfahren Download PDFInfo
- Publication number
- WO2013020821A1 WO2013020821A1 PCT/EP2012/064689 EP2012064689W WO2013020821A1 WO 2013020821 A1 WO2013020821 A1 WO 2013020821A1 EP 2012064689 W EP2012064689 W EP 2012064689W WO 2013020821 A1 WO2013020821 A1 WO 2013020821A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power output
- output stage
- operating
- current
- power
- Prior art date
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
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0236—Industrial applications for vehicles
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
- F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2048—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit said control involving a limitation, e.g. applying current or voltage limits
Definitions
- the invention relates to a device for operating a heating device of a gas sensor, in particular lambda sensor of a motor vehicle, with at least one power output stage providing an operating current, which is operatively connected / operatively connected to the heating device.
- the invention further relates to a method for operating a device for operating a heating device of a gas sensor, in particular as described above, with at least one power output stage providing an operating current, which is operatively connected to the heating device.
- Gas sensors in particular so-called lambda sensors, are usually used in the exhaust system of a motor vehicle in order to measure the oxygen content of the exhaust gas.
- the lambda probe For optimum measurement of the oxygen content, the lambda probe has to reach a certain level
- a heating device is assigned to the gas sensor or the lambda probe, which is controlled via at least one power output stage.
- the power output stage usually forms part of a control unit of the motor vehicle.
- LSU broadband lambda probes
- LFS low-cost, simpler designed jump probes
- the power output stage power must be selected.
- Known power output stages differ in their behavior at maximum current flow or maximum required power.
- a shutdown output stage switches off when its operating current reaches a predefinable current value.
- a limiting output stage limits their
- a lambda probe typically has a characteristic curve of positive temperature response with respect to its heating resistance, so that it has a low resistance at low temperatures, and a high temperature at high temperatures.
- the operation of the heater with preferably exactly the nominal power is particularly important in the so-called Schutzsammlungphase from the start of a combustion engine generating the exhaust gas to the evaporation of the liquid upstream of the lambda probe (dew point).
- the lambda probe may not be heated above 300 ° C, as the impact of water droplets on the hot ceramic of the lambda probe could otherwise lead to thermal shock damage.
- the heater must make the lambda probe hot enough for the water present in the ceramic of the lambda probe or the gas sensor to evaporate. Otherwise, explosive evaporation when the heater is fully switched on after reaching the dew point could also lead to damage.
- the heating power of the heating device provided by the at least one power output stage is therefore only slight in the protective heating phase, but it must not be allowed, for example by a
- the device according to the invention is characterized by the features of claim 1. It allows the safe operation of the heater Gas sensor, in particular a broadband lambda probe, in a simple and cost-effective manner.
- the device is characterized in that at least two power amplifiers connected in parallel are provided, wherein a first one of the power output stages shuts off when you
- Operating current reaches a predetermined operating current, and a second of the power amplifiers limited their operating current to a predetermined maximum value.
- at least two output stages are provided for operating the one heater, which are connected in parallel with each other and have different properties.
- both power output stages are designed such that they provide the same maximum end performance. Both power stages provide an operating current which is supplied to the heater. If the operating current of the disconnecting power output stage reaches the specifiable current value, then it switches
- the power of the further power amplifier limiting the maximum current is then increased in such a way that the power missing due to the switched off power output stage is compensated.
- the maximum value of the further power output stage is correspondingly increased, so that the desired overall power for the
- Heating device is available.
- the shutdown is possible.
- Power output stage subsequently not switched off permanently, but preferably switches on again with each new pulse or clock.
- the device has a control device for operating the power output stages.
- Control device is preferably designed such that it
- control device can be connected to corresponding detection means or has these.
- the control device further comprises, in particular, a microprocessor for processing the acquired information and for controlling the power output stages.
- control device controls the second power output stage in such a way that when the first one is switched off
- Power output stage provides a higher operating performance.
- the operating power of the second power output stage is preferably increased when the first power output stage is omitted or turns off.
- the operating performance of the second power output stage is preferably increased when the first power output stage is omitted or turns off.
- Compensates operating power of the first power output stage it is ensured that the heater is the required total operating power available and the gas sensor reaches the desired operating temperature.
- the first power output stage switches off when reaching the predetermined current value and the operating current of the second
- Power output is limited to a predetermined limit. This results in the advantages already described above for the device.
- the second power output stage is switched off when the first
- the second power output stage is driven in such a way that it blocks the dropped operating power of the first
- the power of the power output stages ie the first power output stage and the second power output stage, by a cyclical switching on and off
- the duty cycle of the second power output stage is increased by a factor which is the square of the ratio of the sum of the current flowing at activated power stages in a switch-on phase and the current corresponding to the cut-off value, to the current at activated power output stages in the adjustment phase flows, corresponds.
- the duty cycle of the remaining power output stage is particularly preferably increased by a factor of 4 in order to obtain the same overall operating power for the heating device as described above.
- Control unit or the device can be lowered thereby.
- Figure a device for operating a heater in a
- the figure shows a simplified representation of a device 1, in the present case surrounded by a dashed line, for operating a heating device 2 a gas sensor 3, which is providable or provided in particular in the exhaust system of a motor vehicle.
- the gas sensor is designed as a lambda probe 4, in particular as a broadband lambda probe.
- the lambda probe 4 has a ceramic body, not shown here, to the
- Temperature control of the lambda probe 4 is used and prevents mechanical damage.
- the ceramic body is usually located in the exhaust gas flow whose oxygen content is to be detected by means of the lambda probe 4.
- the lambda probe 4 in particular the ceramic body, is associated with the heating device 2, which regulates the lambda probe, in particular the ceramic body of the lambda probe, to a specific, predeterminable temperature.
- the device 1 For operating the heating device, the device 1 comprises two buttons
- the power output stages 5, 6 are connected or connectable to the energy source via separate lines.
- the energy source can form part of the device 1, but is preferably provided separately, for example as an energy store of a motor vehicle having the device 1.
- the power output stages 5, 6 are furthermore connected to the heating device 2 via a common line. It is also conceivable that the heating device 2 is connected in each case via a separate line to one of the power output stages 5, 6.
- the device 1 further comprises a control device 8, which is connected to the power output stages 5, 6 and optionally also to the gas sensor 3 and / or its heating device 2.
- the device 1 is preferably designed as a control unit, in particular as an engine control unit of the internal combustion engine of the above-mentioned motor vehicle.
- the first power output stage 5 is designed such that it shuts off when its operating current reaches a predeterminable current value. It thus represents a shutdown power output stage.
- the second power output stage 6 is designed such that it their
- the control device 8 controls the power output stages 5, 6, in each case by specifying a duty cycle, which determines the switching frequency of semiconductor switches of the respective power output stage to those of the respective
- Power output stage 5, 6 set operating performance.
- the controller 8 detects the state of the respective one
- Power output stage so that it detects whether the power output stage 5 is in operation or has switched off, and possibly also whether the operating current of the power output stage 6 has reached the predetermined maximum value.
- control device 8 If the control device 8 detects that the first power output stage has switched off because its operating current has reached the predefinable current value, it controls the second power output stage such that the second power output stage controls the second power output stage
- Power output stage brings a higher operating performance.
- the second power output stage is controlled in such a way that it compensates for the lack of operating power due to the omission or disconnection of the first power output stage.
- the operating power of the second power output stage is set such that its increase corresponds to the power that would deliver the switched off power output stage, if it would be operated with the current at the threshold for switching off, ie the maximum achievable power of the first power output stage.
- the duty cycle of the second power output stage is increased by a factor which corresponds to the square of the ratio which is formed on the one hand the sum of the current, which is not switched off
- the remaining power output stage 6 is driven at half the current with four times the duty cycle.
- the duty cycle is converted into a time (time_old).
- time_old the turn-off of the turn-off first power output stage 5 must be taken into account. This results in:
- the invention is not a device with the two
- Power output stages 5, 6 limited. Rather, it is also conceivable to switch three or more power output stages in parallel to each other, which operate the heating device 2. It is important that at least one shutdown and at least one limiting power output stage are provided. For example, it is also conceivable to provide several shutdown power output stages whose
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280039125.4A CN103718033B (zh) | 2011-08-10 | 2012-07-26 | 用于运行气体传感器的加热装置的设备、方法 |
JP2014524328A JP5883929B2 (ja) | 2011-08-10 | 2012-07-26 | ガスセンサの加熱装置を作動させる装置、方法 |
KR1020147003049A KR101946665B1 (ko) | 2011-08-10 | 2012-07-26 | 가스 센서의 가열 장치를 작동하기 위한 장치 및 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110080717 DE102011080717A1 (de) | 2011-08-10 | 2011-08-10 | Vorrichtung zum Betreiben einer Heizeinrichtung eines Gassensors, Verfahren |
DE102011080717.9 | 2011-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013020821A1 true WO2013020821A1 (de) | 2013-02-14 |
Family
ID=46598509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/064689 WO2013020821A1 (de) | 2011-08-10 | 2012-07-26 | Vorrichtung zum betreiben einer heizeinrichtung eines gassensors, verfahren |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP5883929B2 (de) |
KR (1) | KR101946665B1 (de) |
CN (1) | CN103718033B (de) |
DE (1) | DE102011080717A1 (de) |
WO (1) | WO2013020821A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5883241A (ja) * | 1981-11-13 | 1983-05-19 | Nissan Motor Co Ltd | 酸素濃度センサ内蔵ヒ−タの制御装置 |
DE4033667A1 (de) * | 1989-10-25 | 1991-05-02 | Ngk Insulators Ltd | Sauerstoffsensor |
US20020017285A1 (en) * | 2000-08-07 | 2002-02-14 | Yoshiyuki Okamoto | Gas concentration detector having heater for use in internal combustion engine |
EP1321762A2 (de) * | 2001-12-21 | 2003-06-25 | Honda Giken Kogyo Kabushiki Kaisha | Temperaturreglerapparat für Feuchtigkeitssensor |
DE10229026A1 (de) * | 2002-06-28 | 2004-01-22 | Robert Bosch Gmbh | Elektrische Schaltungsanordnung zum schnellen Hochheizbetrieb einer Lambdasonde einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6304813B1 (en) * | 1999-03-29 | 2001-10-16 | Toyota Jidosha Kabushiki Kaisha | Oxygen concentration detector and method of using same |
JP3622584B2 (ja) * | 1999-08-03 | 2005-02-23 | トヨタ自動車株式会社 | 酸素濃度検出装置 |
JP3671728B2 (ja) | 1999-03-29 | 2005-07-13 | トヨタ自動車株式会社 | 酸素濃度検出装置 |
EP1929151A1 (de) * | 2005-09-21 | 2008-06-11 | Beru Aktiengesellschaft | Verfahren zum ansteuern einer gruppe von glühkerzen in einem dieselmotor |
DE102006012476A1 (de) * | 2006-03-16 | 2007-09-20 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Sensors |
US8121744B2 (en) * | 2008-06-20 | 2012-02-21 | GM Global Technology Operations LLC | Control system and method for oxygen sensor heater control |
-
2011
- 2011-08-10 DE DE201110080717 patent/DE102011080717A1/de active Pending
-
2012
- 2012-07-26 KR KR1020147003049A patent/KR101946665B1/ko active IP Right Grant
- 2012-07-26 JP JP2014524328A patent/JP5883929B2/ja active Active
- 2012-07-26 WO PCT/EP2012/064689 patent/WO2013020821A1/de active Application Filing
- 2012-07-26 CN CN201280039125.4A patent/CN103718033B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5883241A (ja) * | 1981-11-13 | 1983-05-19 | Nissan Motor Co Ltd | 酸素濃度センサ内蔵ヒ−タの制御装置 |
DE4033667A1 (de) * | 1989-10-25 | 1991-05-02 | Ngk Insulators Ltd | Sauerstoffsensor |
US20020017285A1 (en) * | 2000-08-07 | 2002-02-14 | Yoshiyuki Okamoto | Gas concentration detector having heater for use in internal combustion engine |
EP1321762A2 (de) * | 2001-12-21 | 2003-06-25 | Honda Giken Kogyo Kabushiki Kaisha | Temperaturreglerapparat für Feuchtigkeitssensor |
DE10229026A1 (de) * | 2002-06-28 | 2004-01-22 | Robert Bosch Gmbh | Elektrische Schaltungsanordnung zum schnellen Hochheizbetrieb einer Lambdasonde einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs |
Also Published As
Publication number | Publication date |
---|---|
JP2014525047A (ja) | 2014-09-25 |
KR20140051935A (ko) | 2014-05-02 |
CN103718033A (zh) | 2014-04-09 |
JP5883929B2 (ja) | 2016-03-15 |
KR101946665B1 (ko) | 2019-02-11 |
DE102011080717A1 (de) | 2013-02-14 |
CN103718033B (zh) | 2016-02-17 |
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