EP0704621B1 - Synchronisation device without a cam-position sensor for an internal combustion engine - Google Patents

Synchronisation device without a cam-position sensor for an internal combustion engine Download PDF

Info

Publication number
EP0704621B1
EP0704621B1 EP95115292A EP95115292A EP0704621B1 EP 0704621 B1 EP0704621 B1 EP 0704621B1 EP 95115292 A EP95115292 A EP 95115292A EP 95115292 A EP95115292 A EP 95115292A EP 0704621 B1 EP0704621 B1 EP 0704621B1
Authority
EP
European Patent Office
Prior art keywords
engine
reference signal
throttle valve
cylinder
angle
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.)
Expired - Lifetime
Application number
EP95115292A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0704621A2 (en
EP0704621A3 (es
Inventor
Piero De La Pierre
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.)
Marelli Europe SpA
Original Assignee
Magneti Marelli Powertrain SpA
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 Magneti Marelli Powertrain SpA filed Critical Magneti Marelli Powertrain SpA
Publication of EP0704621A2 publication Critical patent/EP0704621A2/en
Publication of EP0704621A3 publication Critical patent/EP0704621A3/en
Application granted granted Critical
Publication of EP0704621B1 publication Critical patent/EP0704621B1/en
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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • 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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
    • 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • 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
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/03—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors with electrical means
    • F02P7/035—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors with electrical means without mechanical switching means
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits

Definitions

  • the present invention relates to a synchronisation method for synchronising an Otto-cycle internal combustion engine of the kind defined in the preamble of Claim 1.
  • DE-4 229 773-A and DE-4 242 419-A disclose methods of synchronisation of the initially-defined kind wherein it is detected whether the ignitions based on a first assumed engine phase lead to an acceleration; if not, the assumed engine phase is shifted by 360°.
  • the object of the present invention is to provide an improved synchronisation method of the afore-mentioned kind.
  • the essential idea on which the present invention is based is that of using an engine reference angle of 360° as the precise reference and of discriminating between odd and even 360° phases of a reference cylinder (which may be any one of the engine's cylinders) by using signals already available to the electronic engine management unit.
  • Ionisation detection circuits supply a signal proportional (in duration or amplitude) to the duration of the spark.
  • the voltage for triggering and maintaining the combustion varies widely according to the pressure in the combustion chamber of the cylinder (approximately proportional to this) while the arc current of the spark is about constant. This means that, for a given energy supplied to the primary winding of the coil (for a given coil efficiency) the duration of the spark varies considerably.
  • the spark lasts for a normal period of time if the cylinder is in compression while it lasts much longer if the cylinder is in the exhaust stroke.
  • the strategy explained above may be improved to increase the certainty of discrimination by using several different cylinders as successive references (still during the first revolution of the engine and possibly fractions of the next revolution).
  • the additional information thus obtained may confirm the first result or indicate the need for further monitoring if the results do not agree.
  • the strategy may be carried out by using other signals which may be available to the engine's electronic management unit.
  • one signal which is always available, or can be deduced is typically the correlation of the engine acceleration (positive or negative) with the throttle valve angle.
  • This information can well be used in symmetrical engines instead of the said signal indicative of ionisation.
  • a four- or six-cylinder engine with pairs of cylinders out of phase by 360° (or even by 370-380°) is considered.
  • the engine may be started with two half-injections of fuel into almost opposed cylinders and with almost simultaneous firing of their ignitions.
  • ignitions are lost in the cylinder on the exhaust stroke but these ignitions (with the valve timing overlap typical of engines in current production) are not harmful. In these conditions the engine starts effectively.
  • throttle valve angle greater than ⁇ O which corresponds, in practice, to a specific required torque, with the engine already started (rotational speed greater than Y revolutions/sec for given ⁇ O and Y)
  • a search strategy may be undertaken to effect discrimination between even and odd 360° angles.
  • This strategy may comprise effecting ignition every 720° for all cylinders, with a random choice of association with the 720° reference, that is, a random choice between even 360° angles and odd 360° angles. If the engine decelerates beyond a predetermined limit, the opposite association is tested, that is the choice between even 360° angles and odd 360° angles is reversed. At the end of this test, the correct reference is thus identified.
  • This strategy may cause a gap in the engine operation but this situation is not dangerous and is scarcely perceptible to the driver since the engine is being started.
  • a strategy for recognising the even 360° angles and odd 360° angles may be carried out independently of the position of the throttle valve when the engine is in the transitional stage between the disconnection of the starter motor and the attainment of idling conditions (about 400-600 revolutions per minute).
  • both the injection and the ignition are controlled with the use of all this information (thus injection may be phased). Even then, one of the above-mentioned strategies may possibly be repeated with the engine running should the engine speed drop inexplicably.
  • Another source of information which can be used to determine the 720° phase reference is provided by pressure sensors in the cylinder, if these are present, since these enable direct determination of whether the reference cylinder is in compression or exhaust.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP95115292A 1994-09-30 1995-09-28 Synchronisation device without a cam-position sensor for an internal combustion engine Expired - Lifetime EP0704621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT94TO000766A IT1268605B1 (it) 1994-09-30 1994-09-30 Dispositivo di sincronizzazione per un motore termico senza sensore di posizione camma.
ITTO940766 1994-09-30

Publications (3)

Publication Number Publication Date
EP0704621A2 EP0704621A2 (en) 1996-04-03
EP0704621A3 EP0704621A3 (es) 1996-05-15
EP0704621B1 true EP0704621B1 (en) 2004-01-28

Family

ID=11412795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115292A Expired - Lifetime EP0704621B1 (en) 1994-09-30 1995-09-28 Synchronisation device without a cam-position sensor for an internal combustion engine

Country Status (4)

Country Link
EP (1) EP0704621B1 (es)
DE (1) DE69532493T2 (es)
ES (1) ES2211891T3 (es)
IT (1) IT1268605B1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6874473B2 (en) 2003-08-11 2005-04-05 Tecumseh Products Company Engine cycle recognition for fuel delivery

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817447A1 (de) 1998-04-20 1999-10-21 Bosch Gmbh Robert Verfahren und Vorrichtung zur Phasenerkennung an einem 4-Takt Ottomotor mit Ionenstrommessung
JP3766244B2 (ja) * 1999-11-02 2006-04-12 株式会社日立製作所 エンジンの気筒判別装置
DE10208942A1 (de) * 2002-02-28 2003-09-11 Siemens Ag Verfahren zur Bestimmung des Einspritzzeitpunktes sowie System zur Durchführung desselben
EP1736656A1 (en) * 2005-06-24 2006-12-27 Ford Global Technologies, LLC Method for determining and regulating the crank angle position of a crankshaft of a four-stroke internal combustion engine
FR2919670A3 (fr) * 2007-07-31 2009-02-06 Renault Sas Procede d'identification du cylindre d'un moteur en phase de compression parmi ceux au point mort haut
FR2925593B1 (fr) * 2007-12-20 2014-05-16 Renault Sas Procede pour produire un signal de synchronisation du cycle de fonctionnement d'un moteur a combustion interne

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2591008B2 (ja) * 1988-01-31 1997-03-19 三菱自動車工業株式会社 フェールセーフ機能付き電子配電式点火装置
JPH03134247A (ja) * 1989-10-19 1991-06-07 Mitsubishi Electric Corp 内燃機関制御装置及び方法
DE4026723A1 (de) * 1990-08-24 1992-02-27 Bosch Gmbh Robert Zuendanlage fuer brennkraftmaschinen
US5174267A (en) * 1991-07-22 1992-12-29 Ford Motor Company Cylinder identification by spark discharge analysis for internal combustion engines
DE4229773C2 (de) * 1992-09-05 2000-07-27 Bosch Gmbh Robert Verfahren zur Zylindererkennung von Brennkraftmaschinen
DE4242419A1 (de) * 1992-12-16 1994-06-23 Bosch Gmbh Robert Verfahren zur Zylindererkennung im Leerlauf von Brennkraftmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6874473B2 (en) 2003-08-11 2005-04-05 Tecumseh Products Company Engine cycle recognition for fuel delivery

Also Published As

Publication number Publication date
ITTO940766A0 (it) 1994-09-30
EP0704621A2 (en) 1996-04-03
ITTO940766A1 (it) 1996-03-30
DE69532493D1 (de) 2004-03-04
EP0704621A3 (es) 1996-05-15
DE69532493T2 (de) 2004-12-02
ES2211891T3 (es) 2004-07-16
IT1268605B1 (it) 1997-03-06

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