EP2064428A1 - Abtastung von brennraumsignalen - Google Patents
Abtastung von brennraumsignalenInfo
- Publication number
- EP2064428A1 EP2064428A1 EP07803355A EP07803355A EP2064428A1 EP 2064428 A1 EP2064428 A1 EP 2064428A1 EP 07803355 A EP07803355 A EP 07803355A EP 07803355 A EP07803355 A EP 07803355A EP 2064428 A1 EP2064428 A1 EP 2064428A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- combustion chamber
- coupled
- decoupled
- scanned
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/022—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using an optical sensor, e.g. in-cylinder light probe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P23/00—Other ignition
- F02P23/04—Other physical ignition means, e.g. using laser rays
Definitions
- the invention relates to a method and a device for scanning combustion chamber signals, in particular from a combustion chamber of an optically ignited fuel engine, especially a gasoline engine.
- the combustion process In order to significantly improve the efficiency of gasoline engines, it is necessary, the combustion process to decor with dark ⁇ th. This includes, to select the amount of fuel, mixture formation ⁇ -making, the ignition timing, boost pressure or exhaust gas recirculation so that an emission controlled as possible and more efficient combustion process takes place.
- information about the combustion process is necessary. This can be relatively simple information such as the number of misfires, the ignition timing or information about the combustion process, such. As pressure and temperature, or complex information about the chemical composition of the exhaust gas.
- combustion chamber parameters for example by means of
- the engine can be operated as usual with glow plugs or spark plugs. Under the light of the region of the electromagnetic spectrum of a wavelength between approximately lmm is here (far Inf ⁇ rarot) to about 50 nm (EUV), in particular between about 780 nm (near IR) to about 380 nm (UV Dim) , However, each of the other suitable ⁇ segment, or a plurality of cut off ⁇ possible.
- the coupled-in light can be precisely determined and, if necessary, changed and, moreover, a defined comparison between coupled-in light and coupled-out light becomes possible.
- sepa- windows for coupling and / or uncoupling is possible, however, it is advantageous if the decoupled for scanning light and, if necessary, the previously ⁇ coupled light are passed through the same window.
- the engine is an optically ignited engine, since in this case a translucent window for coupling an ignition light beam or an optical ignition energy is already present, which can also be used to decouple the scanning or scholarlichtstrahls.
- a sol ⁇ che multiple use of the light-transmitting window of the optically ignition engine is particularly advantageous because normally, z. B. even under laboratory conditions, the window quickly polluted.
- the window is kept free by the supplied ignition radiation (laser pulses, etc.) in that the radiation energy burns away the dirt.
- the diagnostic radiator typically a diagnostic laser
- the transmitted light in the combustion chamber can be reflected in particular to use a ge ⁇ common window for coupling and decoupling.
- combustion chamber signals it is favorable if at least the intensity of the transmitted light is scanned, in particular in order to determine a concentration of at least one chemical element or a chemical compound in the combustion chamber. Also, a temperature and / or a pressure in the combustion chamber can be determined.
- the decoupled stray light is used. Both previously mentioned embodiments, namely using the transmitted light and the scattered light, can be used alternatively or together.
- the coupled-out light can be scanned in particular by means of a Raman spectroscopy. to determine a frequency shift between the injected light and the outcoupled light. In particular, this can be identified in the combustion chamber at least a certain molecule ⁇ art. In this process form can also, z. B. by additional sampling of
- a temperature and / or pressure in the combustion chamber can be determined.
- the coupling of light can preferably be done using a (relatively) broadband laser diode or a vapor lamp as the radiation or light source.
- the sampling is conveniently done by means of a grating spectrograph with a photodiode array, a spectrometer with a micromechanically moving grating or a tunable interference filter.
- FIG. 1 shows a cross-sectional view of a sketch of an embodiment of the invention.
- the fuel supply device 5 may be formed in various ways, for. B. as a valve, nozzle and so on.
- IR radiation visible light and / or UV radiation.
- This translucent window 6 is used here firstly for the passage of radiation for optical ignition of the located in the cylinder head 1 fuel / air mixture, the associated Zündstrahlungsario is not shown here for clarity.
- light 8 is additionally generated by a light source 7, which is coupled via an optical system 9 (which may eg comprise a light guide) into the combustion chamber 4 for purposes of signal scanning. As a rule, this light is not used to influence the combustion.
- a light or radiation detector 10 which scans light 11 emerging from the combustion chamber 4, possibly after it has passed through a suitable optical system 12 (which may, for example, comprise an optical waveguide ). In this case, (scanning) light is coupled in and out through the same translucent window 6. For clarity, not shown is an associated control and Ausncevorrich- tion.
- laser spectroscopy with tunable laser diodes is used to determine combustion chamber parameters.
- the light source comprises a tunable laser diode 7, the quasi ⁇ monochromatic light is coupled through the optical access 6 into the combustion chamber 4, while a frequency of emission of the laser 7 selectively varies over a current ramp.
- the light coupled in this way travels twice through the combustion chamber 4 through the optical access 6 to the detector 10, which time-resolved the intensity of the thus passing or transmitted Radiation of the laser 7 receives.
- the wavelength of the light is a function of time due to the traversed La ⁇ serfrequenz
- the traversed path ⁇ length is due to the movement of the piston is a function of time.
- a synchronization of the detector signal with the crankshaft or a parameter of the crankshaft (eg position, etc.) and the laser control (wavelength change by current ramp) is also carried out.
- the movement of the reflector 13 on the Kolbenoberflä ⁇ che is helpful to a resolution limiting interferences to minimize this movement corresponds to a modulation of a resonator length.
- Raman spectroscopy Another suitable method is Raman spectroscopy. In contrast to the above-described direct laser spectroscopy with tunable laser diodes, the Raman spectroscopy does not evaluate the transmitted light but the coupled-out scattered light.
- a characteristic spectrum for example an emission spectrum of a laser or light of a vapor lamp
- the light inelastically scattered at the molecules and atoms can then be decoupled again by the optical access 6 and fed to a detector 10 in the form of z. B. a spectrometer and / or spectrograph supplied and analyzed who ⁇ the, z. B. via optical fibers.
- a detector 10 in the form of z. B. a spectrometer and / or spectrograph supplied and analyzed who ⁇ the, z. B. via optical fibers.
- the frequency shift between the irradiated light and scattered light 8 is characteristic for each type of molecule ( ⁇ vibration and rotation energy) and therefore is suitable for the identification of the atomic or molecular species.
- the intensities of those frequencies, which differ from the original carrier frequency of the incident light 8, then give, as described above, for laser spectroscopy with tunable laser diode. oden very accurate information about the nature and state of the involved molecule or atom. For example, the spectral distribution of the intensities of the different rotation lines of a molecule can be used for temperature measurement.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Testing Of Engines (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006043700A DE102006043700A1 (de) | 2006-09-18 | 2006-09-18 | Abtastung von Brennraumsignalen |
| PCT/EP2007/059437 WO2008034729A1 (de) | 2006-09-18 | 2007-09-10 | Abtastung von brennraumsignalen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2064428A1 true EP2064428A1 (de) | 2009-06-03 |
Family
ID=38787721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07803355A Withdrawn EP2064428A1 (de) | 2006-09-18 | 2007-09-10 | Abtastung von brennraumsignalen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2064428A1 (de) |
| DE (1) | DE102006043700A1 (de) |
| WO (1) | WO2008034729A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009009260B4 (de) * | 2009-02-17 | 2014-05-28 | Audi Ag | Verfahren und Vorrichtung zur Untersuchung der Gemischbildung und/oder Verbrennung in einem Zylinder einer Brennkraftmaschine |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1483612A (en) * | 1974-07-05 | 1977-08-24 | Lumenition Ltd | Detection of combustion in internal combustion engines |
| DE3106330A1 (de) * | 1980-01-18 | 1982-10-07 | Robert Bosch Gmbh, 7000 Stuttgart | Sensoranordnung |
| US4794452A (en) * | 1986-07-31 | 1988-12-27 | Westinghouse Electric Corp. | Through flame optical viewing |
| DE3627074A1 (de) * | 1986-08-09 | 1988-02-11 | Bosch Gmbh Robert | Einrichtung zur beobachtung und auswertung von verbrennungsvorgaengen in brennkraftmaschinen |
| DE4124116A1 (de) * | 1991-07-17 | 1993-01-21 | Iris Gmbh Infrared & Intellige | Spektraler pyroelektrischer infrarotmotorsensor |
| DE4320943C2 (de) * | 1993-06-24 | 2001-02-15 | Lavision Gmbh | Verfahren zur Charakterisierung der Arbeitsweise von Verbrennungsmotoren durch Messen der Gaszusammensetzung im Brennraum durch Raman-Spektroskopie |
| EP0766080A1 (de) * | 1995-09-29 | 1997-04-02 | FINMECCANICA S.p.A. AZIENDA ANSALDO | System und Verfahren zur Überwachung eines Verbrennungsvorgangs und von Schadstoffen mit Laserdioden |
| DE19809792C2 (de) * | 1998-03-09 | 2000-03-30 | Fraunhofer Ges Forschung | Vorrichtung zur Messung der Emission und/oder Absorption eines heißen Gases oder Plasmas |
| DE19901795B4 (de) * | 1999-01-19 | 2004-04-22 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Verbrennungsdiagnosesystem |
| DE19925583C2 (de) * | 1999-06-04 | 2002-06-13 | Lavision Gmbh | Verfahren zur Bestimmung der räumlichen Konzentration der einzelnen Komponenten eines Gemisches, insbes. eines Gasgemisches in einem Brennraum, insbes. eines Motors sowie eine Anordnung zur Durchführung des Verfahrens |
| DE19952240A1 (de) * | 1999-10-29 | 2001-05-03 | Volkswagen Ag | Verbrennungsmeßstand und Verfahren zur Untersuchung von Verbrennungsvorgängen |
| DE10208485B4 (de) * | 2002-02-27 | 2009-12-03 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Verfahren und Vorrichtung zur Reinigung der Oberfläche eines an einem Brennraum eines Verbrennungsmotors angeordneten optischen Fensters |
-
2006
- 2006-09-18 DE DE102006043700A patent/DE102006043700A1/de not_active Ceased
-
2007
- 2007-09-10 WO PCT/EP2007/059437 patent/WO2008034729A1/de not_active Ceased
- 2007-09-10 EP EP07803355A patent/EP2064428A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008034729A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008034729A1 (de) | 2008-03-27 |
| DE102006043700A1 (de) | 2008-03-27 |
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Effective date: 20100617 |
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| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SIEMENS AKTIENGESELLSCHAFT |
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