EP0992680A1 - Methode zur Steuerung der Temperaturen in den Brennräumen einer Brennkraftmaschine - Google Patents

Methode zur Steuerung der Temperaturen in den Brennräumen einer Brennkraftmaschine Download PDF

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Publication number
EP0992680A1
EP0992680A1 EP98830590A EP98830590A EP0992680A1 EP 0992680 A1 EP0992680 A1 EP 0992680A1 EP 98830590 A EP98830590 A EP 98830590A EP 98830590 A EP98830590 A EP 98830590A EP 0992680 A1 EP0992680 A1 EP 0992680A1
Authority
EP
European Patent Office
Prior art keywords
temperature
supply circuit
engine
combustion chambers
glow plugs
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.)
Withdrawn
Application number
EP98830590A
Other languages
English (en)
French (fr)
Inventor
Roberto c/o Champion Automotive S.p.a. Rossi
Sandro c/o Champion Automotive S.p.a. Goretti
Moh'd Ammar Champion Automotive S.p.a. Shunnar
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.)
Champion Automotive SpA
Original Assignee
Champion Automotive 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 Champion Automotive SpA filed Critical Champion Automotive SpA
Priority to EP98830590A priority Critical patent/EP0992680A1/de
Publication of EP0992680A1 publication Critical patent/EP0992680A1/de
Withdrawn legal-status Critical Current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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/026—Glow plug actuation during engine operation
    • 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
    • F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
    • F02D35/026—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures using an estimation
    • 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
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/028—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs the glow plug being combined with or used as a sensor
    • 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
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
    • F02P19/022—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls using intermittent current supply
    • 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
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/025—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs with means for determining glow plug temperature or glow plug resistance

Definitions

  • the present invention relates to a method for controlling the temperature in the combustion chambers of an internal combustion engine, comprising:
  • a method for regulating the temperature of heating plugs of diesel engines comprising a heating step which is operative for a short time interval immediately preceding the engine ignition.
  • the supply circuit provides a voltage with short interruptions during which the temperature into the combustion chambers is measured.
  • the supply circuit is turned off after reaching a predetermined temperature in the combustion chambers and remains inactive when the engine is operating.
  • the object of the present invention is to provide a method for controlling operating conditions of an internal combustion engine, which improves the engine general operative conditions, with particular reference to the reduction of polluting exhaust emissions (EOBD) and to optimizing fuel consumption.
  • EOBD polluting exhaust emissions
  • a plurality of glow plugs schematically indicated 10 are associated, in a conventional way, to respective combustion chambers (not shown) of a diesel internal combustion engine.
  • the glow plugs 10 are associated with a supply circuit 12 comprising a plurality of power switches 14 which are preferably mosfet each of which is connected to a respective glow plug 10.
  • the power of the mosfets 14 is selected depending on the type of glow plug.
  • the switches 14 have the purpose of closing and opening the glow plugs supply circuit depending on signals originating from a control unit 16.
  • the supply circuit 12 further comprises a current sensor for each supply branch (one for each glow plug 10), which may be constituted by an internal resistance of each mosfet and may be used also as sensors for diagnosing the supply circuit operative state, that is for detecting interruptions or short circuit on the glow plug supply branches. Any possible irregularity is detected by comparators 18 which send to an alarm module 20 signals indicative of such irregularities.
  • the glow plugs control system which is disclosed in the following controls the glow plug temperature during the phases currently known as pre-heating and post-heating (before starting the engine) and in addition carries out a continuous monitoring of the temperature in the combustion chambers during engine operation. Therefore the system minimizes polluting effects due to low operating temperatures and can issue a signal indicating engine overheating conditions.
  • the system for monitoring and controlling the glow plugs 10 comprises, in addition to the control module 16 and the alarm module 20, a supply module 22 and a measure and regulating module 24.
  • the supply module 22 is a functional block which generates all the voltages necessary for the correct operation of the system.
  • the input voltage of the supply module 22 is provided by the dashboard key switch.
  • the supply module 22 provides an internal supply voltage preferably obtained by a series regulating circuit which provides an output of about 7.5 V, which can support wide variations of the system supply voltage (the battery voltage) and at the same time ensure a very reduced variation of the supply voltage of the various blocks of the system.
  • the supply module 22 For driving the power devices, the supply module 22 provides a bootstrap voltage which is a variable voltage whose value is about 12 V higher than the system supply voltage.
  • the supply module 22 provides also a steady and precise reference voltage independent of the variations of the system supply voltage.
  • the reference voltage is used for defining various reference thresholds for temperature readings and for the alarms.
  • the supply module 22 can also be provided with UV and OV alarms respectively for signalling undervoltage and overvoltage conditions. These alarms represent the operative limits of the system and the system is switched-off when the input voltage falls outside these limits.
  • the measure and regulating block 24 detects the temperature in the combustion chambers by measuring the resistance of the glow plugs 10, by virtue of the variation of this parameter with the temperature.
  • the measure system is based on the detection potential difference on individual glow plugs when a current with known and constant value flows through them.
  • the measure current is provided by a PNP transistor 15 which carries out the function of a current generator calibrated for emitting a measure current of 0.5 A.
  • the measure of temperature is carried out during time intervals in which the supply circuit 12 is inactive and no supply current flows through the glow plugs 10. In these conditions, a calibrated measurement current produced by said current generator passes through the glow plugs 10 and the potential difference on each glow plug 10 is directly related to the temperature in the respective combustion chamber.
  • a unitary temperature value is obtained by calculating an average of the temperature values relating to the various combustion chambers.
  • the temperature of each combustion chamber could be detected separately.
  • the measure of temperature is controlled by a signal generated by an oscillator having a clock rate which can vary preferably from a few milliseconds to a few hundreds of milliseconds during the step of pre-heating (condition in which the engine is not running) and which is slowed-down to a suitable frequency during the maintaining phase (engine running).
  • the measurement and regulation block 24 sends a signal to the control block 16 which temporaneously switches-off the glow plugs 10 for a time interval sufficient for carrying out the measure.
  • the supply circuit 12 In maintaining conditions, if the supply circuit 12 is turned-off the system measures directly the resistance of the glow plugs 10 at the predetermined intervals whereas if the supply circuit 12 is turned-on even when the engine is running, before carrying out the measure of temperature, the supply of the glow plugs is temporaneously switched-off for enabling the passage of the measure current.
  • the measure and regulating block compares the values indicative of the temperature in the combustion chamber with minimum and maximum temperature thresholds. If the detected value is lower than the minimum temperature threshold, the control block 16 turns-on the supply circuit 12, both during pre-heating and running conditions of the engine. If the detected temperature is higher than the maximum temperature threshold, the alarm block 20 generates suitable alarm signals to the driver or to an upper lever control system. In order to avoid possible alarm conditions which are transient or caused by disturbances, which could distract the driver, the alarm condition is enabled only when an anomalous condition permains for a predetermined time.
  • the control block 16 during the maintaining phase turns-on the supply circuit 12 only if the respective control signal remains continuously on for a predetermined time.
  • An heating cycle which consists in switching to a conductive condition the power switches 14 controlling the glow plugs 10, is started at the same time as a control signal is validated.
  • a verification phase of the state of the glow plugs 10 is carried out and when a condition of open circuit or short circuit is detected a signal is generated indicating an anomalous condition. In this case, the faulty branch is immediately turned-off and an alarm signal is generated.
  • a maintaining cycle is started at the end of the heating cycle, each time a temperature in the combustion chamber is detected which is lower than said minimum threshold.
  • the system continues to read the glow plug temperatures at predetermined intervals during the whole running period of the engine and activates a heating condition for re-establishing the correct operative temperature when the detected value is lower than the intervention limit.
  • the system according to the present invention enables therefore the temperature in the engine combustion chambers to be constantly maintained into a predetermined interval, which can be chosen for instance so as to minimize the content of polluting agents in the exhaust gas (EOBD) and for optimizing fuel consumption.
  • EOBD exhaust gas

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  • 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)
EP98830590A 1998-10-07 1998-10-07 Methode zur Steuerung der Temperaturen in den Brennräumen einer Brennkraftmaschine Withdrawn EP0992680A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98830590A EP0992680A1 (de) 1998-10-07 1998-10-07 Methode zur Steuerung der Temperaturen in den Brennräumen einer Brennkraftmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98830590A EP0992680A1 (de) 1998-10-07 1998-10-07 Methode zur Steuerung der Temperaturen in den Brennräumen einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP0992680A1 true EP0992680A1 (de) 2000-04-12

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EP98830590A Withdrawn EP0992680A1 (de) 1998-10-07 1998-10-07 Methode zur Steuerung der Temperaturen in den Brennräumen einer Brennkraftmaschine

Country Status (1)

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EP (1) EP0992680A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1298321A3 (de) * 2001-09-27 2005-11-16 Beru AG Verfahren zum Aufheizen eines elektrischen Heizelementes, insbesondere einer Glühkerze für eine Brennkraftmaschine
EP1762724A1 (de) * 2005-09-09 2007-03-14 Beru AG Verfahren und Vorrichtung zum Betreiben der Glühkerzen einer selbstzündenden Brennkraftmaschine
WO2010012344A1 (de) * 2008-07-26 2010-02-04 Beru Aktiengesellschaft Verfahren zum bestromen einer glühkerze
US20100161150A1 (en) * 2008-11-25 2010-06-24 Ngk Spark Plug Co., Ltd. Apparatus for controlling the energizing of a heater
WO2011095529A3 (de) * 2010-02-08 2011-10-13 Robert Bosch Gmbh Verfahren und vorrichtung zum betreiben einer glühkerze in einer brennkraftmaschine eines kraftfahrzeuges

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159578A (en) * 1984-06-01 1985-12-04 Bosch Gmbh Robert Controlling the temperature of a glow plug in an internal combustion engine
EP0315934A1 (de) 1987-11-09 1989-05-17 Siemens Aktiengesellschaft Verfahren zur Temperaturregelung von Glühkerzen bei Dieselmotoren und Schaltungsanordnung zur Durchführung des Verfahrens
US5144922A (en) * 1990-11-01 1992-09-08 Southwest Research Institute Fuel ignition system for compression ignition engines
EP0565431A1 (de) * 1992-04-07 1993-10-13 Regie Nationale Des Usines Renault S.A. Verbesserungen an Dieselbrennkraftmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159578A (en) * 1984-06-01 1985-12-04 Bosch Gmbh Robert Controlling the temperature of a glow plug in an internal combustion engine
EP0315934A1 (de) 1987-11-09 1989-05-17 Siemens Aktiengesellschaft Verfahren zur Temperaturregelung von Glühkerzen bei Dieselmotoren und Schaltungsanordnung zur Durchführung des Verfahrens
US5144922A (en) * 1990-11-01 1992-09-08 Southwest Research Institute Fuel ignition system for compression ignition engines
EP0565431A1 (de) * 1992-04-07 1993-10-13 Regie Nationale Des Usines Renault S.A. Verbesserungen an Dieselbrennkraftmaschinen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1298321A3 (de) * 2001-09-27 2005-11-16 Beru AG Verfahren zum Aufheizen eines elektrischen Heizelementes, insbesondere einer Glühkerze für eine Brennkraftmaschine
EP1762724A1 (de) * 2005-09-09 2007-03-14 Beru AG Verfahren und Vorrichtung zum Betreiben der Glühkerzen einer selbstzündenden Brennkraftmaschine
US7431004B2 (en) 2005-09-09 2008-10-07 Beru Ag Method and device for operation of the glow plugs of a diesel engine
DE102006010194B4 (de) * 2005-09-09 2011-06-09 Beru Ag Verfahren und Vorrichtung zum Betreiben der Glühkerzen einer selbstzündenden Brennkraftmaschine
US8082090B2 (en) 2005-09-09 2011-12-20 Beru Ag Method and device for operation of the glow plugs of a Diesel engine
WO2010012344A1 (de) * 2008-07-26 2010-02-04 Beru Aktiengesellschaft Verfahren zum bestromen einer glühkerze
US8614407B2 (en) 2008-07-26 2013-12-24 Borgwarner Beru Systems Gmbh Method for supplying current to a glow plug
US20100161150A1 (en) * 2008-11-25 2010-06-24 Ngk Spark Plug Co., Ltd. Apparatus for controlling the energizing of a heater
US8423197B2 (en) * 2008-11-25 2013-04-16 Ngk Spark Plug Co., Ltd. Apparatus for controlling the energizing of a heater
WO2011095529A3 (de) * 2010-02-08 2011-10-13 Robert Bosch Gmbh Verfahren und vorrichtung zum betreiben einer glühkerze in einer brennkraftmaschine eines kraftfahrzeuges

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