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EP0439194B1 - System zur Erkennung des Arbeitstakts der Kolben einer inneren Brennkraftmaschine - Google Patents

System zur Erkennung des Arbeitstakts der Kolben einer inneren Brennkraftmaschine Download PDF

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Publication number
EP0439194B1
EP0439194B1 EP91100990A EP91100990A EP0439194B1 EP 0439194 B1 EP0439194 B1 EP 0439194B1 EP 91100990 A EP91100990 A EP 91100990A EP 91100990 A EP91100990 A EP 91100990A EP 0439194 B1 EP0439194 B1 EP 0439194B1
Authority
EP
European Patent Office
Prior art keywords
sequence
signals
sensor
signal
engine
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
EP91100990A
Other languages
English (en)
French (fr)
Other versions
EP0439194A1 (de
Inventor
Gabriele Serra
Carlo Conticelli
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 SpA
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Filing date
Publication date
Application filed by Magneti Marelli SpA filed Critical Magneti Marelli SpA
Publication of EP0439194A1 publication Critical patent/EP0439194A1/de
Application granted granted Critical
Publication of EP0439194B1 publication Critical patent/EP0439194B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02P15/008—Reserve ignition systems; Redundancy of some ignition devices
    • 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
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • F02P7/07—Hall-effect pick-up devices
    • 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
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/077—Circuits therefor, e.g. pulse generators
    • F02P7/0775—Electronical verniers

Definitions

  • the present invention relates to a system for identifying the strokes of an internal combustion engine.
  • Internal combustion engine electronic ignition systems are known to feature an electronic control system for determining spark advance on the basis of signals received from various sensors (principally engine speed and stroke sensors). If said systems are also electronic injection types, on the basis of further signals (intake air pressure and temperature), the control system determines, for example, air density inside the manifold and engine speed, and calculates, via interpolation on respective memorised maps, the stroke of the engine and fuel injection time to the injectors.
  • Said electronic ignition system employs angle references fitted on to the drive and distributor shafts to enable the control system to identify the stroke of each cylinder on the engine (intake, compression, expansion, exhaust).
  • the aim of the present invention is to provide an internal combustion engine stroke identification system designed to overcome the above drawback, i.e. which enables the engine to be operated even in the event of a fault on the stroke sensor.
  • An internal combustion engine stroke identification system comprising :
  • the system according to the present invention may be used on engines featuring an electronic ignition system with or without an electronic injection system.
  • the engine also features an electronic injection system, i.e. a certain type of fuel supply, but, as will become apparent in the following description, the system according to the present invention also applies in the case of fuel supplied by an ordinary carburetor, providing, of course, provision is made for an electronic ignition system.
  • Fig.1 shows a schematic view of an electronic injection system for an internal combustion engine 101, conveniently a four-cylinder engine, shown partially in cross section.
  • Said system comprises an electronic control system 102 in turn comprising, in substantially known manner, a microprocessor 103 and memories containing maps relative to various operating conditions of engine 101.
  • Control system 102 also comprises a counter 104; an updatable memory register 105; and an addressable-cell memory register 106.
  • Control system 102 receives signals from:
  • Control system 102 is grounded and connected to a supply battery 124.
  • Control system 102 controls the opening time of electroinjectors 127 located inside manifold 115, close to the intake valve of each cylinder, for controlling fuel supply to the various cylinders on engine 101, and controls fuel injection timing for commencing fuel supply in relation to the stroke (intake, compression, expansion, exhaust) of engine 101.
  • Electroinjector 127 is supplied with fuel via a pressure regulator 128 sensitive to the pressure inside intake manifold 115, and having a fuel inlet conduit 131 connected to a pump (not shown), and a return conduit 132 to a tank (not shown).
  • control system 102 is connected to an ignition pulse control unit 133 connected to distributor 113.
  • pulley 108 presents four projecting teeth 134 equally spaced at 90° intervals, and sensor 107 is arranged facing the passage of teeth 134, at such an angle as to detect passage, for example, +10° and +100° in advance of the top dead center position of each cylinder.
  • Pulley 108 may be fitted so that said angles range respectively from +20° to +0° and from +110° to +90°, one pair of teeth 134 being square with the other.
  • S The sequence of signals supplied by sensor 107 as drive shaft 111 rotates is shown in Fig.4a. Again with reference to Fig.
  • sensor 112 is arranged facing a disc 135 secured angularly to the shaft of distributor 113, and having two projecting teeth 136 ninety degrees apart.
  • sensor 112 is located within the cylinder 3 range of distributor 113, and at such an angle that, when one tooth 134 is arranged facing speed sensor 107, the first tooth 136 on disc 135 lags 27.5° in relation to the axis of sensor 112.
  • the sequence of signals (C) supplied by sensor 112 (Fig.4b) for each complete cycle of engine 101 presents a first signal 55° behind the foregoing signal from sensor 107 and, in the example shown, 135° ahead of the top dead center position of cylinder 3.
  • the electronic ignition system becomes totally ineffective and engine 101 stops, and can only be restarted by repairing sensor 112.
  • the system according to the present invention enables operation of engine 101 to be continued on the basis of the operating cycle preceding that in which the fault is developed on sensor 112.
  • a repeat cycle starting block 170 goes on to a block 171 for enabling the S and C signal observation channels, and which goes on to a block 172 relative to an S and C signal identification routine.
  • block 172 goes on to block 173 and, in the event of a C signal, to block 174.
  • Block 173 provides for updating counter 104 and memorising the S signal (Fig.4c), after which it goes on to block 175, which checks whether the signal received and certified in block 171 conforms with what has been updated on counter 104.
  • Block 176 provides for sequentially supplying the ignition pulses via unit 133 and, in the case of electronic injection systems, for also controlling fuel supply, after which it goes back to start block 170 for the next cycle.
  • Block 177 checks whether a C signal should have been received and, in the event of a positive response, goes on to block 178. In the event of a negative response, block 177 goes on to block 181, which memorises the S signal error, which may be caused, for example, by a spurious signal.
  • Block 178 provides for updating counter 104 as though a C signal had been received, after which it goes on to block 182 and, from there, to block 176.
  • Block 182 provides for memorising the C signal error, i.e. the fact that a C signal has not been received.
  • Block 174 checks the existence of a C signal error and, in the event of a positive response, goes on to block 183. In the event of a negative response, block 174 goes on to block 184, which provides for updating counter 104 and memorising the C signal.
  • blocks 173 and 184 provide for mapping and memorising the S and C signal sequence in counter 104, so that block 178 in effect provides for taking and updating the reference map preceding the C signal error and defined in blocks 173 and 184.
  • Block 184 goes on to block 185 which, like block 175, determines whether the incoming signal conforms with the content of counter 104. If it does, block 185 goes on to block 176 and, if it does not, to block 186.
  • Block 183 provides for deleting the C signal error in block 182, and block 186 for memorising the sequence error.
  • Blocks 181, 183 and 186 go on to a resynchronizing routine which, on the basis of a predetermined number of S and C signals, identifies the various strokes of the cylinders. Said routine is shown in Fig.3 of EP-A-204 221. Blocks 181, 183 and 186 therefore go back to the start block shown in Fig.3 of EP-A-204 221.
  • counter 104 can count from 0 to 9.
  • the time sequence of the output value from counter 104 is shown in Fig.4c.
  • Counter 104 is incremented one unit for each signal received from sensors 107 and 112, and, when the maximum value (9) is reached, the next signal from sensor 107 sends the counter back to 0 in that the same signal cycle from sensors 107 and 112 and the same stroke cycle of engine 101 is repeated.
  • the output value of 0 to 9 on counter 104 therefore identifies the strokes of engine 101, as described in EP-A- 204 220, corresponding to Italian Patent n.1184957 entitled “Startup fuel supply system for an internal combustion engine comprising an electronic injection system” filed on 4.6.1985 by the present Applicant, issued on 28.10.1987.
  • block 176 provides for sequentially supplying the ignition pulses via unit 133, while distribution to the various cylinders is performed by distributor 113.
  • the system according to the present invention assumes said information to be already verified, and therefore controls engine 101 on the basis of the map memorised prior to development of the fault on sensor 112.
  • the system keeps a close watch on operation of sensor 112 and, when this is restored, is once more synchronized with engine 101.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (4)

  1. Identifikationssystem für die Takte einer Verbrennungskraftmaschine (101) mit
    einem Kraftstoffversorgungsteil;
    einem elektronischen Zündsystem mit einem Verteiler (113);
    einem ersten Sensor (107) zum Erfassen von vorbestimmten Winkelstellungen einer Antriebswelle (111);
    einem zweiten Sensor (112) zum Erfassen von vorbestimmten Winkelstellungen der Welle des Verteilers (113);
    Mitteln (104) zum Definieren einer Abfolge von Signalen (S, C) von dem ersten Sensor (107) bzw. dem zweiten Sensor (112);
    Mitteln (173) zum Speichern der Abfolge der Signale (S, C); dadurch gekennzeichnet, daß es enthält:
    Mittel (174, 175, 177, 185) zum Vergleichen der Abfolge der Signale (S, C) des gegenwärtigen Zyklus mit derjenigen eines vorhergehenden Zyklus;
    Mittel (177), um gemäß der Abfolge des vorhergehenden Zyklus das Nicht-Empfangen eines Signals (C) von dem zweiten Sensor (112) festzustellen;
    Mittel (178) zum Aktualisieren der Abfolge des gegenwärtigen Zyklus gemäß der Abfolge des vorhergehenden Zyklus im Falle des Nicht-Empfangens des Signals (C) von dem zweiten Sensor (112); und
    Verarbeitungsmittel (102) zum Empfangen von Signalen, welche der aktualisierten Abfolge der Signale (S, C) von dem ersten Sensor (107) und dem zweiten Sensor (112) entsprechen;
    Identifizieren der Takte der Maschine (101) und Freigeben des elektronischen Zündsystems.
  2. System nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zum Definieren der Abfolge der Signale (S, C) einen Zähler (104) enthalten, der für jedes der Signale (S oder C) von dem ersten Sensor (107) und dem zweiten Sensor (112), das von den Verarbeitungsmitteln (102) empfangen wird, um eine Einheit weitergeschaltet wird und so ausgelegt ist, daß er für jedes Weiterschalten die Verarbeitungsmittel (102) mit einem entsprechenden Signal versorgt, um die Abfolge der Signale (S, C) von dem ersten Sensor (107) und dem zweiten Sensor (112) zu definieren, wobei der Inhalt des Zählers (104) durch jede Wiederholung des Zyklus der Signale (S, C) von dem ersten Sensor (107) und dem zweiten Sensor (112) zurückgesetzt wird.
  3. System nach Anspruch 1 und/oder Anspruch 2, dadurch gekennzeichnet, daß es Mittel (182, 183, 186) zum Speichern eines möglichen Fehlers in der Abfolge der Signale (S, C) von dem ersten Sensor (107) und dem zweiten Sensor (112) des gegenwärtigen Zyklus im Vergleich mit der Abfolge des vorhergehenden Zyklus enthält.
  4. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß es bei einem zeitgesteuerten, sequentiellen elektronischen Einspritzsystem einer Verbrennungskraftmaschine verwendet wird.
EP91100990A 1990-01-26 1991-01-25 System zur Erkennung des Arbeitstakts der Kolben einer inneren Brennkraftmaschine Expired - Lifetime EP0439194B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6706690 1990-01-26
IT67066A IT1239869B (it) 1990-01-26 1990-01-26 Sistema di tipo perfezionato per l'identificazione delle fasi di un motore endotermico

Publications (2)

Publication Number Publication Date
EP0439194A1 EP0439194A1 (de) 1991-07-31
EP0439194B1 true EP0439194B1 (de) 1996-04-24

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Application Number Title Priority Date Filing Date
EP91100990A Expired - Lifetime EP0439194B1 (de) 1990-01-26 1991-01-25 System zur Erkennung des Arbeitstakts der Kolben einer inneren Brennkraftmaschine

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Country Link
EP (1) EP0439194B1 (de)
DE (1) DE69118931T2 (de)
ES (1) ES2087167T3 (de)
IT (1) IT1239869B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1245012B (it) * 1991-01-29 1994-09-13 Weber Srl Sistema di identificazione delle fasi di un motore endotermico

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204220A2 (de) * 1985-06-04 1986-12-10 WEBER S.r.l. Kraftstoffzumesssystem beim Anlassen eines mit einer elektronischen Einspritzeinrichtung ausgerüsteten Brennkraftmotors
EP0204221A2 (de) * 1985-06-04 1986-12-10 WEBER S.r.l. Hubidentifizierungssystem für einen Innenbrennkraftmotor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951622A1 (de) * 1979-12-21 1981-07-02 Volkswagenwerk Ag, 3180 Wolfsburg Anordnung zur gewinnung von signalen fuer zuendung und/oder kraftstoffeinspritzung fuer eine 4-takt-brennkraftmaschine
JP2648928B2 (ja) * 1988-04-28 1997-09-03 富士重工業株式会社 自動車用エンジンの気筒判別装置および気筒別制御方法
JP2648929B2 (ja) * 1988-04-30 1997-09-03 富士重工業株式会社 エンジンの気筒判別装置
JP2544472B2 (ja) * 1989-03-01 1996-10-16 株式会社日立製作所 多気筒エンジン用燃焼制御装置
US4932379A (en) * 1989-05-01 1990-06-12 General Motors Corporation Method for detecting engine misfire and for fuel control

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204220A2 (de) * 1985-06-04 1986-12-10 WEBER S.r.l. Kraftstoffzumesssystem beim Anlassen eines mit einer elektronischen Einspritzeinrichtung ausgerüsteten Brennkraftmotors
EP0204221A2 (de) * 1985-06-04 1986-12-10 WEBER S.r.l. Hubidentifizierungssystem für einen Innenbrennkraftmotor

Also Published As

Publication number Publication date
EP0439194A1 (de) 1991-07-31
ES2087167T3 (es) 1996-07-16
IT9067066A0 (it) 1990-01-26
IT1239869B (it) 1993-11-15
DE69118931D1 (de) 1996-05-30
IT9067066A1 (it) 1991-07-27
DE69118931T2 (de) 1996-09-19

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