EP1884637A2 - Procédé destiné au nettoyage d'une chambre de combustion et d'une courroie d'admission d'un moteur à combustion interne - Google Patents

Procédé destiné au nettoyage d'une chambre de combustion et d'une courroie d'admission d'un moteur à combustion interne Download PDF

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Publication number
EP1884637A2
EP1884637A2 EP07010764A EP07010764A EP1884637A2 EP 1884637 A2 EP1884637 A2 EP 1884637A2 EP 07010764 A EP07010764 A EP 07010764A EP 07010764 A EP07010764 A EP 07010764A EP 1884637 A2 EP1884637 A2 EP 1884637A2
Authority
EP
European Patent Office
Prior art keywords
fuel
combustion chamber
air mixture
inlet
cleaning
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
EP07010764A
Other languages
German (de)
English (en)
Other versions
EP1884637A3 (fr
EP1884637B1 (fr
Inventor
Stephan Müller
Jean-Martin Wolf
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1884637A2 publication Critical patent/EP1884637A2/fr
Publication of EP1884637A3 publication Critical patent/EP1884637A3/fr
Application granted granted Critical
Publication of EP1884637B1 publication Critical patent/EP1884637B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
    • 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
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or 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
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/28—Control for reducing torsional vibrations, e.g. at acceleration

Definitions

  • the invention relates to a method for cleaning a combustion chamber and an intake passage of an internal combustion engine according to the features of the preamble of claim 1.
  • a generic method is from the DE 102 03 750 A1 known.
  • Both internal combustion engines with direct injection of the fuel into the combustion chamber and internal combustion engines in which the fuel is injected into the intake tract can suffer from the problem of component coking.
  • a coking occurs in particular at the intake valves, but also at other points of the intake tract and the combustion chamber. This may be due, for example, to the fact that the internal combustion engines are operated with fuels of inferior quality.
  • the resulting formation of deposits and contamination of the intake tract and the combustion chamber can lead to serious malfunctions.
  • a coking lining of the inlet valve in the region of the valve throat may disturb a so-called tumble flow, possibly so much that, as a consequence, misfiring occurs. Under certain circumstances, these can lead to irreversible damage to a catalytic converter arranged in the exhaust tract for exhaust gas purification.
  • the coking pad can form a flow resistance, which can lead to significant power losses due to insufficient cylinder filling, especially in the upper load and speed range of the internal combustion engine.
  • the coking pad of the intake valve may prevent a correct valve closing, resulting in compression losses and thus sporadic misfiring. Another consequence of the formation of deposits and contamination may be that the engine can not be started, stops or even a total loss occurs.
  • the present invention has for its object to provide a method for cleaning a combustion chamber and an intake tract of an internal combustion engine, which ensures in a simple manner that they are cleaned of deposits and coking.
  • the required energy can be introduced into the coking region.
  • injection quantities and ignition the necessary boundary conditions with respect to temperature and free oxygen can be generated in order to achieve an effective and harmless combustion of the pads.
  • the ignition of the conditioned fuel / air mixture takes place at a point in time at which the inlet valve is at least approximately completely opened.
  • the fuel / air mixture burns through the open inlet valve into the inlet channel.
  • the flame front can thus reach the entire coking area (inlet tract or inlet channel, inlet valve, combustion chamber and piston) and generate the initialization temperature for the oxidation.
  • further flushing cycles may be provided to ensure the thermal stability or to increase the cleaning efficiency.
  • a fuel / air mixture is not flamed in every second intake stroke, but offset accordingly.
  • a flushing with fuel may be provided in the rinsing cycle with air, z. B. from the inlet channel.
  • a flushing with fuel may be provided in the rinsing cycle with air, z. B. from the inlet channel.
  • a flushing with fuel may be provided.
  • Fig. 1 shows a section of an internal combustion engine which is provided in a cylinder chamber 1 of a cylinder 2 with a movably arranged piston 3, which is reciprocated in the cylinder chamber 1 to execute four cycles of a working cycle by a crankshaft, not shown.
  • the piston 3 separates from the cylinder chamber 1 from a combustion chamber 4.
  • To the combustion chamber 4 lead two inlet channels 5 (in the sectional view, only one inlet channel is shown), via which the combustion air required for combustion is supplied.
  • the opening of the inlet channel 5 is opened and closed by at least one inlet valve 6.
  • the intake valve 6 is opened accordingly.
  • To the combustion chamber 4 continue to lead two outlet channels 7 (in the sectional view, only one outlet channel is visible).
  • the opening of the outlet channel 7 to the combustion chamber 4 is opened and closed by a corresponding outlet valve 8.
  • Both valves 6, 8 are actuated for example via an intake and exhaust camshaft, not shown.
  • a fuel injection valve 9 is provided, which is arranged in a cylinder head of the internal combustion engine, that the fuel can be injected directly into the combustion chamber 4.
  • the exemplary embodiment is thus a Internal combustion engine with a direct injection of fuel.
  • the invention is not limited to this, but the inventive solution can also be applied to internal combustion engines, in which the fuel injection valve 9 injects fuel into the inlet channel 5.
  • the fuel / air mixture supplied to the combustion chamber 4 as well as to the inlet channel 5 (through the opened inlet valve 6) is ignited with the aid of an ignition device 10 arranged in the center of the combustion chamber roof, which in the exemplary embodiment is shown only schematically as the ignition location.
  • the inlet valve 6 and the inlet channel 5 represent parts of an inlet tract 11 in the exemplary embodiment.
  • a treated fuel / air mixture is ignited in the inlet channel 5 and in the combustion chamber 4 when the inlet valve 6 is open.
  • the ignition of the treated fuel / air mixture takes place at a time of the intake stroke (see FIG. 2), in which the intake valve 6 is fully opened.
  • the injected amount of the ignitable fuel / air mixture in particular also with regard to the provision of oxygen and the time of ignition are chosen such that a necessary for the combustion of deposits and coking in the combustion chamber 4 and the inlet tract 11 and the inlet channel 5 initialization temperature is reached , This may preferably be 700 to 800 ° C.
  • a burning off of deposits and coking at the inlet valve 6 is also to be understood as meaning that an inlet valve seat, a valve stem guide and optionally other components in the region of the inlet valve which functionally belong to the inlet valve are cleaned accordingly.
  • the lightning symbol in the line "ignition" of FIG. 2 can also be seen that in the exemplary embodiment, a cleaning combustion, ie a flaming of the ignitable fuel / air mixture takes place during each second intake stroke.
  • a cleaning combustion ie a flaming of the ignitable fuel / air mixture takes place during each second intake stroke.
  • the intermediate clocks ie in the intake stroke, in which no cleaning combustion in Cleaning mode occurs, the deposits are discharged and fed to fuel and oxygen. Further flushing cycles or intermediate cycles may be provided to secure the thermal stability or increase the cleaning efficiency.
  • the burned deposits are sucked in with intake air.
  • the deposits (analogous to the normal operation of the internal combustion engine) are ejected into the exhaust.
  • a further exhaust stroke may be provided to flush out the deposits (not shown in FIG. 2).
  • the described procedure is subsequently repeated until the cleaning mode has been completed or a desired cleanliness of the combustion chamber 4 and the intake tract 11 has been achieved.
  • fuel enters the exhaust. This can possibly ignite there and thus clean the exhaust of deposits.
  • the cleaning mode is initiated at low rotational speeds (low load point) of the internal combustion engine, preferably in idling mode, and driven through in a cylinder-specific manner.
  • the cleaning mode for the first cylinder (Cyl. 1)
  • the next cylinder (Cyl. 2) is set in the cleaning mode.
  • the procedure is continued until all cylinders have been cleaned. While one cylinder is being cleaned, it is envisaged that the other cylinders will continue to operate in normal operation. It is provided in the exemplary embodiment that after passing through the cleaning mode or the cleaning procedure, the result achieved is checked, d. H. the achieved cleanliness of the combustion chamber 4 and the intake tract 11 is assessed. If necessary, the procedure is repeated.
  • the cleaning mode each based on measurable criteria, eg. B. the number of engine revolutions since the last cleaning or the amount of fuel which has been supplied to the internal combustion engine since the last cleaning is started.
  • measurable criteria eg. B. the number of engine revolutions since the last cleaning or the amount of fuel which has been supplied to the internal combustion engine since the last cleaning is started.
  • the solution according to the invention is implemented as a cleaning mode in the form of an operating strategy in a control unit of a motor vehicle. If appropriate, correspondingly robust adaptive operating strategies can be provided for this purpose. Alternatively, an implementation may also be provided as a cleaning mode on an (external) engine control unit or a computer unit, which is left to the customer service branches for targeted monitoring.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP20070010764 2006-07-27 2007-05-31 Procédé destiné au nettoyage d'une chambre de combustion et d'une courroie d'admission d'un moteur à combustion interne Expired - Fee Related EP1884637B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610034633 DE102006034633A1 (de) 2006-07-27 2006-07-27 Verfahren zum Reinigen eines Brennraums und eines Einlasstrakts einer Brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP1884637A2 true EP1884637A2 (fr) 2008-02-06
EP1884637A3 EP1884637A3 (fr) 2009-12-09
EP1884637B1 EP1884637B1 (fr) 2010-12-01

Family

ID=38670007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070010764 Expired - Fee Related EP1884637B1 (fr) 2006-07-27 2007-05-31 Procédé destiné au nettoyage d'une chambre de combustion et d'une courroie d'admission d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1884637B1 (fr)
DE (2) DE102006034633A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012213241A1 (de) * 2012-07-27 2014-02-13 Bayerische Motoren Werke Aktiengesellschaft Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014006415A1 (de) 2014-05-02 2015-11-05 Daimler Ag Verfahren und Anordnung zum Reinigen eines Einlasskanals und/oder eines Brennraums einer Brennkraftmaschine
DE102018126692A1 (de) 2018-10-25 2020-04-30 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors mit Kraftstoffdirekteinspritzung
DE102018126693A1 (de) 2018-10-25 2020-04-30 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6178944B1 (en) * 1999-08-31 2001-01-30 Ford Global Technologies, Inc. Valve cleaning method for direct injection spark ignition engine
EP1258610A2 (fr) * 2001-04-07 2002-11-20 Volkswagen Aktiengesellschaft Moteur à combustion interne avec injection directe
DE10203750A1 (de) * 2002-01-31 2003-03-27 Porsche Ag Verfahren zum Betreiben einer Viertakt-Brennkraftmaschine mit Direkteinspritzung
JP2004251155A (ja) * 2003-02-18 2004-09-09 Toyota Motor Corp 筒内噴射式内燃機関の制御装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849318C (de) * 1943-02-03 1952-09-15 Vacuum Oel Ag Deutsche Verfahren und Vorrichtung zur Reinigung von Brennkraftmaschinen
DE832964C (de) * 1950-11-01 1952-11-27 Rudolf Haase Verfahren und Einrichtung zur Reinigung von Benzin- und Dieselmotoranlagen
US2843645A (en) * 1953-06-29 1958-07-15 California Research Corp Method and apparatus for removing combustion chamber deposits
US4809662A (en) * 1973-02-28 1989-03-07 John A. Mcdougal Internal combustion engine ignition system
FR2766926B1 (fr) * 1997-07-29 1999-09-24 Elf Antar France Procede et dispositif de decalaminage d'une chambre de combustion d'un moteur diesel
JP2001289097A (ja) * 2000-04-10 2001-10-19 Mitsubishi Motors Corp 筒内噴射エンジンの燃料噴射制御装置
JP2004245077A (ja) * 2003-02-12 2004-09-02 Toyota Motor Corp 内燃機関の制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6178944B1 (en) * 1999-08-31 2001-01-30 Ford Global Technologies, Inc. Valve cleaning method for direct injection spark ignition engine
EP1258610A2 (fr) * 2001-04-07 2002-11-20 Volkswagen Aktiengesellschaft Moteur à combustion interne avec injection directe
DE10203750A1 (de) * 2002-01-31 2003-03-27 Porsche Ag Verfahren zum Betreiben einer Viertakt-Brennkraftmaschine mit Direkteinspritzung
JP2004251155A (ja) * 2003-02-18 2004-09-09 Toyota Motor Corp 筒内噴射式内燃機関の制御装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012213241A1 (de) * 2012-07-27 2014-02-13 Bayerische Motoren Werke Aktiengesellschaft Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors
DE102012213241B4 (de) * 2012-07-27 2016-11-24 Bayerische Motoren Werke Aktiengesellschaft Erkennung einer Verkokung im Einlasstrakt eines Verbrennungsmotors
US9556802B2 (en) 2012-07-27 2017-01-31 Bayerische Motoren Werke Aktiengesellschaft Detection of coking in the intake tract of an internal combustion engine

Also Published As

Publication number Publication date
DE502007005815D1 (de) 2011-01-13
EP1884637A3 (fr) 2009-12-09
EP1884637B1 (fr) 2010-12-01
DE102006034633A1 (de) 2008-01-31

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