WO2001040753A1 - Vorrichtung zur überwachung der im brennraum eines verbrennungsmotors ablaufenden verbrennungsvorgänge - Google Patents
Vorrichtung zur überwachung der im brennraum eines verbrennungsmotors ablaufenden verbrennungsvorgänge Download PDFInfo
- Publication number
- WO2001040753A1 WO2001040753A1 PCT/EP2000/009003 EP0009003W WO0140753A1 WO 2001040753 A1 WO2001040753 A1 WO 2001040753A1 EP 0009003 W EP0009003 W EP 0009003W WO 0140753 A1 WO0140753 A1 WO 0140753A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- combustion chamber
- housing
- light
- light guide
- combustion
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
Definitions
- the invention relates to a device of the type mentioned in the preamble of claim 1.
- the light emitted by the flame in the combustion chamber is coupled out of the combustion chamber by means of light guides and fed to a light / voltage converter (photomultiplier, photodiode or CCD array).
- the electrical voltage generated in these converters is proportional to the light intensity and can be converted into digital data that can be processed further using EDP technology using an AD converter.
- These methods and devices therefore do not require any electrical auxiliary or supply voltages, or coupling in extraneous light (e.g. by laser light).
- a device of the type mentioned in the preamble of claim 1 in the form of a spark plug for internal combustion engines in which a group of light guides is installed around the circumference of the spark plug housing To be able to analyze the ignition phase after the actual ignition and the early propagation phase of the flame.
- this device only a partial area of the combustion chamber can be viewed, and a locally resolved observation of the flame propagation in engine combustion chambers is only possible to a limited extent even if several collecting bores provided in the spark plug only connect a few light guides of the group to one another.
- a device known from DE-A1-198 23 594 in which a light guide integrated in a cylinder head gasket is provided, which establishes a connection between the combustion chamber and an evaluation unit.
- the light guide opens into the combustion chamber via a translucent sealing element.
- the invention has for its object to provide a device of the type mentioned that allows a locally resolved observation of the combustion processes without influencing the thermal or mechanical state of the combustion chamber and with a simple structure
- the inventive design of the device allows a locally resolved observation of the flame propagation in engine combustion chambers without influencing the thermal or mechanical state of the combustion chamber and with a simple structure with a simple structure.
- the device according to the invention can be used both in gasoline and in diesel engines.
- Figure 1 is a plan view of the end of the measuring section of an embodiment the device
- FIG. 2 shows a sectional view along the line A according to FIG. 1,
- FIG. 3A shows a partial view of the housing according to FIG. 2, which shows the arrangement of the light guide and the light entry opening,
- FIG. 3B shows a view corresponding to FIG. 3A of a modified embodiment
- FIG. 3C shows a view corresponding to FIG. 3A of a further embodiment
- FIG. 4A shows a perspective view of the end of an embodiment of the light guide on the combustion chamber side.
- FIG. 4B shows a side view of the light guide according to FIG. 4A
- FIG. 4C shows a front view of the light guide according to FIG. 4A
- Figure 5 is a plan view of the end of an embodiment of the device in
- FIG. 5A shows a partially cut away view of the embodiment according to FIG. 5,
- FIG. 5B shows a view of a modified embodiment corresponding to part of FIG. 5A
- Figure 6 is a plan view of the end of an embodiment of the device in
- FIG. 6A shows a partially sectioned view of the embodiment according to FIG. 6, broken away;
- FIG. 6B shows a view of a modified embodiment corresponding to part of FIG. 6A,
- FIG. 7 shows an embodiment of an evaluation unit for a device according to one of FIGS. 1 to 6.
- the embodiment of the device shown schematically in FIGS. 1 and 2 has, for example, a cylindrical housing or a holder 1 in which a number of bores, for example nine bores 3, are formed, in each of which a light guide 2 is arranged, the longitudinal axis of which is parallel to Longitudinal axis of the housing 1 runs.
- a pressure sensor can also be installed (not shown) in order to enable simultaneous measurement of the sector-resolved light emission and of the combustion chamber pressure.
- the ring of light guides can also surround the center electrode of a spark plug or an injection nozzle arrangement.
- the cylindrical housing 1 typically has a diameter of 10-12 mm and can be installed by means of a thread in a bore provided for this purpose in a cylinder head, the upper end in FIG. 2 forming a measuring section which extends into the combustion chamber.
- the bore can e.g. the glow plug hole are suitable.
- the bores 3 in the housing 1 each have an end section 3A on the combustion chamber side, which extends at an angle to the longitudinal axis of the housing 1 and thus of the light guide through an outer surface of the measuring section into the (not shown) combustion chamber.
- the combustion light can be coupled into the light guide 2 through the end sections 3A of the bores, as shown in FIG. 3A.
- further light guides advantageously in the form of quartz glass rods 4
- the surface of these quartz glass rods 4 on the combustion chamber side can be ground concavely or convexly as a lens in order to adjust the viewing angle 9 (FIGS. 5 and 6) according to requirements.
- these quartz glass rods 4 essentially end with the outer surface of the measuring section. According to FIG. 3C, however, they can also be designed with an overhang which is dimensioned such that the lens reaches the temperature at all operating points of the internal combustion engine at which contamination by "free burning” is reliably prevented. This can be supported by coating the lens with a catalytically active layer (e.g. platinum) which is only a few nm (nanometers) thick - and therefore optically transparent - and which reduces the necessary "free-burning temperature" on the lens surface. If the quartz glass rods 4 are installed with a protrusion, an opaque coating of the cylindrical part of the rods should be provided in order to prevent the incidence of light from the side.
- a catalytically active layer e.g. platinum
- the combustion light incident via the end sections 3A of the bores 3 or the quartz glass rods 4 arranged therein is coupled into the light guides 2 mounted in the bores 3, the likewise quartz glass rods are coupled in with a diameter which is preferably larger than the diameter of the end sections 3A or the quartz glass rods 4 is.
- quartz glass rods 2 are in turn provided with an opaque coating 7 in their cylindrical part.
- a window 6, parallel to the longitudinal axis of the quartz glass rod 2, is ground in for coupling in the light, and an oblique surface 5, mirrored on the rear, is ground in order to deflect the light (B).
- the angle of the mirrored surface is dimensioned in accordance with the angle ⁇ (FIG. 3A) of the end section 3A.
- the angle of the inclined surface 5 and the lens cut of the quartz glass rods 4 are designed so that the entire combustion chamber can be viewed as uniformly as possible with all the light guides 2, 4 installed in the housing 1.
- the light emerging from the quartz glass rods 2 is coupled into flexible light guide 20 in the housing 1 (see FIG. 2) and thus led out of the combustion chamber for further processing in an evaluation unit shown in FIG.
- the combustion light is fed to corresponding light / voltage converters 21 (photomultipliers or photodiodes) for measuring the total light and converted there into an electrical voltage proportional to the light intensity.
- This electrical voltage is amplified in amplifiers 22 (DC voltage amplifiers with a bandwidth of at least 100 kHz) and channel-wise supplied to an EDP-supported measurement data processing system (not shown).
- the light signal from the light guides 20 is preferably divided into several branches in an optical light splitter 25, so that characteristic wavelengths (e.g. radiation of OH: 310 nm) for the combustion processes can be measured by means of optical filters 26.
- characteristic wavelengths e.g. radiation of OH: 310 nm
- 1 is formed by the jacket of a spark plug, as shown in Figures 5, 5A and 5B.
- the angle ⁇ of the light entry holes formed by the end sections 3A and the lens cut of the quartz glass rods are designed so that with the light guides
- the end sections 3A of the bores 3 or the quartz glass rods 4 arranged therein are positioned so that they lie exactly in the direction of the injection jets 14 emanating from the nozzle bores 13 and are designed with respect to their angle ⁇ in such a way that they are present in the piston recess which is always present in direct-injection diesel engines "see".
- the end sections 3A open in the peripheral region of the housing 1. However, depending on the desired observation region, it is also possible for these end sections to open into the end face of the housing on the combustion chamber side.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001542169A JP2003515736A (ja) | 1999-12-02 | 2000-09-14 | 内燃機関の燃焼室内で実行される燃焼過程を監視するための装置 |
US10/204,607 US6882418B1 (en) | 1999-12-02 | 2000-09-14 | Device for monitoring the combustion processes occurring in the combustion chamber of an internal combustion engine |
EP00966016A EP1238254A1 (de) | 1999-12-02 | 2000-09-14 | Vorrichtung zur überwachung der im brennraum eines verbrennungsmotors ablaufenden verbrennungsvorgänge |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19958122 | 1999-12-02 | ||
DE19958122.3 | 1999-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001040753A1 true WO2001040753A1 (de) | 2001-06-07 |
Family
ID=7931188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/009003 WO2001040753A1 (de) | 1999-12-02 | 2000-09-14 | Vorrichtung zur überwachung der im brennraum eines verbrennungsmotors ablaufenden verbrennungsvorgänge |
Country Status (4)
Country | Link |
---|---|
US (1) | US6882418B1 (de) |
EP (1) | EP1238254A1 (de) |
JP (1) | JP2003515736A (de) |
WO (1) | WO2001040753A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006018606A1 (de) * | 2006-01-04 | 2007-07-05 | Beru Ag | Messglühkerze |
EP1967834A3 (de) * | 2007-03-08 | 2009-11-18 | AVL List GmbH | Zündkerze mit einem Druckmesseinrichtung |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011040589A1 (ja) * | 2009-09-30 | 2011-04-07 | イマジニアリング株式会社 | 観察用プラグ、及び点火観察システム |
DE102012103628B4 (de) * | 2012-04-25 | 2020-12-31 | Avl Emission Test Systems Gmbh | Vorrichtung zur Bestimmung der Konzentration zumindest eines Gases in einem Probengasstrom |
JP2016138835A (ja) * | 2015-01-28 | 2016-08-04 | トヨタ自動車株式会社 | 内燃機関の筒内温度測定装置 |
DE112016006667T5 (de) * | 2016-03-31 | 2018-12-20 | Honda Motor Co., Ltd. | Optische messsonde und damit versehene optische messvor-richtung |
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EP0385321A2 (de) * | 1989-02-27 | 1990-09-05 | Olympus Optical Co., Ltd. | Verfahren und mit einem Endoskop versehene Vorrichtung zur Untersuchung von mit rotierenden und alternativen Kolben ausgerüstete Maschinen, in denen Löcher für Zündkerzen vorgesehen sind |
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2000
- 2000-09-14 JP JP2001542169A patent/JP2003515736A/ja active Pending
- 2000-09-14 EP EP00966016A patent/EP1238254A1/de not_active Withdrawn
- 2000-09-14 US US10/204,607 patent/US6882418B1/en not_active Expired - Fee Related
- 2000-09-14 WO PCT/EP2000/009003 patent/WO2001040753A1/de not_active Application Discontinuation
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AT379870B (de) * | 1981-01-08 | 1986-03-10 | List Hans | Einrichtung zur beobachtung des verbrennungsablaufes im brennraum einer brennkraftmaschine |
EP0385321A2 (de) * | 1989-02-27 | 1990-09-05 | Olympus Optical Co., Ltd. | Verfahren und mit einem Endoskop versehene Vorrichtung zur Untersuchung von mit rotierenden und alternativen Kolben ausgerüstete Maschinen, in denen Löcher für Zündkerzen vorgesehen sind |
US5922948A (en) * | 1995-01-09 | 1999-07-13 | Colorado Seminary Dba University Of Denver | Thermal imaging system for internal combustion engines |
DE19710654A1 (de) * | 1997-03-14 | 1998-09-17 | Iav Gmbh | Optische Sonde zum Erfassen der Strahlung von Verbrennungsvorgängen, vorzugsweise in Brennräumen von Verbrennungsmotoren |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006018606A1 (de) * | 2006-01-04 | 2007-07-05 | Beru Ag | Messglühkerze |
DE102006018606B4 (de) * | 2006-01-04 | 2008-05-08 | Beru Ag | Messglühkerze |
EP1967834A3 (de) * | 2007-03-08 | 2009-11-18 | AVL List GmbH | Zündkerze mit einem Druckmesseinrichtung |
Also Published As
Publication number | Publication date |
---|---|
JP2003515736A (ja) | 2003-05-07 |
US6882418B1 (en) | 2005-04-19 |
EP1238254A1 (de) | 2002-09-11 |
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