EP1056943A1 - Procede d'injection de carburant - Google Patents

Procede d'injection de carburant

Info

Publication number
EP1056943A1
EP1056943A1 EP99948669A EP99948669A EP1056943A1 EP 1056943 A1 EP1056943 A1 EP 1056943A1 EP 99948669 A EP99948669 A EP 99948669A EP 99948669 A EP99948669 A EP 99948669A EP 1056943 A1 EP1056943 A1 EP 1056943A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
knocking
predetermined
inhomogeneous
characteristic
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
EP99948669A
Other languages
German (de)
English (en)
Other versions
EP1056943B1 (fr
Inventor
Matthias Philipp
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
Publication of EP1056943A1 publication Critical patent/EP1056943A1/fr
Application granted granted Critical
Publication of EP1056943B1 publication Critical patent/EP1056943B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F02D41/30—Controlling fuel injection
    • 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
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • 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
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3076—Controlling fuel injection according to or using specific or several modes of combustion with special conditions for selecting a mode of combustion, e.g. for starting, for diagnosing
    • 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
    • F02D41/1402—Adaptive 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
    • F02D41/30—Controlling fuel injection
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
    • F02D41/3023—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode
    • F02D41/3029—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode further comprising a homogeneous charge spark-ignited mode

Definitions

  • the present invention relates to a fuel injection method for an internal combustion engine, an injection being carried out alternatively in a homogeneous normal operation or in an inhomogeneous stratified operation.
  • the problem underlying the present invention generally consists in the fact that a fixed ignition point is necessary in order to be able to safely ignite the stratified charge in the combustion chamber.
  • This fixed ignition timing may be possible at certain operating points. lie very early, typically up to a crankshaft position of 50 ° before top dead center (TDC).
  • the fuel injection method according to the invention with the features of claim 1 has the advantage over the known approaches that the internal combustion engine is operated as far as possible in the fuel-efficient stratified operation, and is only switched to the homogeneous normal operation when knocking combustion (e.g. with high intake air - and / or cooling water temperatures make this absolutely necessary, otherwise there is a risk of damage to parts of the engine.
  • the knock intensity is recorded as a characteristic quantity for knocking on the at least one cylinder of the internal combustion engine. machine in inhomogeneous stratified operation and switching from at least one cylinder from inhomogeneous stratified operation to homogeneous normal operation when the knocking intensity of one cylinder exceeds a predetermined first knocking intensity threshold.
  • the knocking frequency is recorded as a characteristic variable for knocking on a plurality of cylinders of the internal combustion engine in inhomogeneous stratified operation and a switchover from the several cylinders from inhomogeneous stratified operation to homogeneous normal operation when the knocking frequency of the several cylinders is a predetermined first Knock frequency threshold exceeded.
  • throttling is carried out in homogeneous normal operation after the switchover, detection of a characteristic quantity for knocking on at least one cylinder of the internal combustion engine in homogeneous normal operation and an adjustment of the ignition angle when the detected characteristic quantity of one cylinder occurs predetermined second criterion, preferably with regard to knocking intensity or knocking frequency.
  • homogeneous normal operation is carried out during a period dependent on the operating point and a switchover from at least one cylinder from homogeneous normal operation to inhomogeneous stratified operation.
  • a variable characteristic of knocking is detected on at least one cylinder of the internal combustion engine in homogeneous normal operation and a switchover from at least one cylinder from homogeneous normal operation to inhomogeneous shift operation after performing homogeneous normal operation during a period dependent on the operating point only if the detected characteristic size of the one cylinder fulfills a predetermined third criterion, preferably with regard to knock intensity or knock frequency.
  • a characteristic curve is set in which a switchover between the homogeneous normal operation and the inhomogeneous shift operation is carried out as a function of at least one engine-specific parameter, preferably speed and load, and at least a part of the characteristic curve is shifted in response to the fact that at an operating point for which the inhomogeneous stratified operation is intended, it is detected that the detected characteristic size of the one cylinder fulfills a predetermined fourth criterion, preferably with regard to knock intensity or knock frequency.
  • a base point of the characteristic curve corresponding to the operating point is shifted by a predetermined first amount to an adapted base point.
  • the knock intensity is recorded as a characteristic quantity for knocking on the at least one cylinder of the internal combustion engine in inhomogeneous stratified operation and the part of the characteristic curve is shifted when the knock intensity of one cylinder exceeds a predetermined second knock intensity threshold value. which is less than the first knock intensity threshold.
  • the knocking frequency is recorded as a characteristic variable for knocking on several cylinders of the internal combustion engine in inhomogeneous stratified operation and the part of the characteristic is shifted when the knocking frequency of one cylinder exceeds a predetermined second knocking frequency threshold value, which is less than the first knock frequency threshold.
  • the adapted base point of the characteristic curve corresponding to the operating point is shifted back by a predetermined second amount in the direction of the original base point if the detected characteristic size of the one cylinder for a specific time period is a predetermined five tes criterion, preferably with regard to knock intensity or knock frequency, wherein the predetermined second amount is preferably less than the predetermined first amount.
  • the cylinders can be controlled by respective individual throttle valves and the detection and switching is carried out separately for each cylinder.
  • At least one cylinder is throttled in inhomogeneous stratified operation if the detected characteristic size of the one cylinder fulfills a predetermined sixth criterion, preferably with regard to knock intensity or knock frequency.
  • the knock intensity is recorded as a characteristic quantity for knocking on the at least one cylinder of the internal combustion engine in inhomogeneous stratified operation and throttling of at least one cylinder in inhomogeneous stratified operation when the knocking intensity of one cylinder reaches a predetermined third knocking intensity threshold ell value that is smaller than the predetermined first and second knock intensity threshold.
  • the knocking frequency is recorded as being characteristic of the knocking.
  • FIG. 1 shows a schematic representation of the adaptation of a characteristic curve in which a switchover between the homogeneous normal operation and the inhomogeneous shift operation is carried out as a function of the speed and load according to an exemplary embodiment of the fuel according to the invention.
  • D denotes the speed and L the load of the internal combustion engine in question
  • U the characteristic curve in which a switchover between homogeneous normal operation and inhomogeneous stratified operation is performed as a function of the speed D and load L
  • S1- ⁇ 5 being support points of the characteristic curve U, between which it is expedient to interpolate.
  • I is the area for inhomogeneous shift operation
  • II is the area for homogeneous normal operation.
  • S3 ' is an adapted base and U' is a correspondingly adapted characteristic.
  • ⁇ is a shift amount of the base S3 in the direction of the area II
  • ⁇ is a corresponding backward shift amount in the direction of the area I.
  • the knock intensity is continuously recorded as a characteristic variable for knocking on each cylinder of the internal combustion engine in inhomogeneous stratified operation and in homogeneous normal operation.
  • Shift operation exceeds a predetermined first knock intensity threshold value, all cylinders are switched from inhomogeneous shift operation to homogeneous normal operation.
  • homogeneous normal operation throttling is carried out after the switchover and the knocking intensity is continued. If the knock intensity is still too high, the ignition angle can be adjusted in homogeneous normal operation.
  • the characteristic curve U is changed in response to the fact that it is detected at an operating point, here B, for which the inhomogeneous stratified operation is intended that the detected characteristic size of a cylinder fulfills a predetermined criterion, namely when the knock intensity at least one cylinder exceeds a predetermined second knock intensity threshold that is lower than the first knock intensity threshold.
  • the base point S3 of the characteristic curve U is shifted according to the operating point (B) by a predetermined first amount ⁇ to an adapted base point S3 '.
  • the adapted characteristic part U '(dashed line) can be formed, on which the switchover between inhomogeneous stratified operation and homogeneous normal operation takes place. If no cylinder lies above the second knock intensity threshold value, the adapted base S3 'of the characteristic curve U is shifted back according to the operating point B by a predetermined second amount ⁇ in the direction of the original base S3, the predetermined second amount ⁇ being smaller than the predetermined one first
  • Amount is ⁇ . This is repeated periodically until the original base S3 is reached again.
  • the cylinders can be controlled by respective individual throttle valves, not only the detection but also the switching can be carried out separately for each cylinder.
  • throttling of a cylinder can take place in inhomogeneous stratified operation if the knocking intensity of one cylinder exceeds a predetermined third knocking intensity threshold value, which is smaller than the predetermined first and second knocking intensity threshold value. How far this
  • Throttling can depend on the type of engine concerned. Although the present invention has been described above on the basis of preferred exemplary embodiments, it is not restricted to these, but can be modified in a variety of ways.
  • the knocking intensity and the knocking frequency can of course also be carried out simultaneously.
  • the characteristic curve can be adapted in any way and is not limited to the illustrated type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

La présente invention concerne un procédé d'injection de carburant pour moteur à combustion interne, selon lequel l'injection se fait soit en mode normal, c'est-à-dire de façon homogène, soit en mode stratifié, c'est-à-dire de façon non homogène. Au niveau d'au moins un cylindre du moteur à combustion interne est effectuée une mesure d'une grandeur caractéristique pour le cognement, lorsque l'injection se fait en mode stratifié, c'est-à-dire de façon inhomogène. Un passage du ou des cylindres du mode d'injection stratifié, c'est-à-dire d'une injection inhomogène, au mode d'injection normal, c'est-à-dire à une injection homogène, se fait lorsque la grandeur caractéristique du cylindre mesurée remplit un premier critère prédéterminé.
EP99948669A 1998-12-22 1999-07-23 Procede d'injection de carburant Expired - Lifetime EP1056943B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19859424A DE19859424A1 (de) 1998-12-22 1998-12-22 Kraftstoff-Einspritzverfahren
DE19859424 1998-12-22
PCT/DE1999/002260 WO2000037788A1 (fr) 1998-12-22 1999-07-23 Procede d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1056943A1 true EP1056943A1 (fr) 2000-12-06
EP1056943B1 EP1056943B1 (fr) 2004-01-21

Family

ID=7892235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99948669A Expired - Lifetime EP1056943B1 (fr) 1998-12-22 1999-07-23 Procede d'injection de carburant

Country Status (6)

Country Link
US (1) US6612283B1 (fr)
EP (1) EP1056943B1 (fr)
JP (1) JP2002533606A (fr)
KR (1) KR20010040888A (fr)
DE (2) DE19859424A1 (fr)
WO (1) WO2000037788A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3587097B2 (ja) * 1999-08-26 2004-11-10 トヨタ自動車株式会社 内燃機関の燃焼制御装置
DE19941528A1 (de) * 1999-09-01 2001-03-08 Bosch Gmbh Robert Verfahren zum Betreiben einer Brennkraftmaschine
DE10325018B4 (de) * 2003-06-03 2013-02-21 Continental Automotive Gmbh Verfahren zur Steuerung des Übergangs von einer ersten Betriebsart eines mit Kraftstoff-Direkteinspritzung arbeitenden Ottomotors auf eine zweite Betriebsart
DE102008018620B4 (de) * 2008-04-11 2017-10-12 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zur Bestimmung des Zündwinkels in einem Steuergerät für elektronische Steuerungen von Brennkraftmaschinen
DE102009001904A1 (de) * 2009-03-26 2010-09-30 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine, Steuereinrichtung für eine Brennkraftmaschine und Brennkraftmaschine mit Direkteinspritzung
US9175621B2 (en) 2012-09-17 2015-11-03 Fca Us Llc Engine management strategy

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04187851A (ja) * 1990-11-20 1992-07-06 Toyota Motor Corp 筒内直接噴射式火花点火機関
JP4036906B2 (ja) 1996-05-15 2008-01-23 三菱電機株式会社 筒内噴射内燃機関の制御装置
DE19631986A1 (de) * 1996-08-08 1998-02-12 Bosch Gmbh Robert Steuereinrichtung für eine direkteinspritzende Benzinbrennkraftmaschine
US5922372A (en) * 1996-11-06 1999-07-13 Husky Injection Molding Systems Ltd. High speed locking clamp
JP3198957B2 (ja) * 1996-12-19 2001-08-13 トヨタ自動車株式会社 希薄燃焼内燃機関の出力変動抑制制御装置
DE19823280C1 (de) * 1998-05-25 1999-11-11 Siemens Ag Verfahren zum Betreiben einer direkteinspritzenden Brennkraftmaschine während des Starts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0037788A1 *

Also Published As

Publication number Publication date
US6612283B1 (en) 2003-09-02
DE19859424A1 (de) 2000-06-29
DE59908366D1 (de) 2004-02-26
EP1056943B1 (fr) 2004-01-21
KR20010040888A (ko) 2001-05-15
WO2000037788A1 (fr) 2000-06-29
JP2002533606A (ja) 2002-10-08

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