EP0635638A2 - Circuit de détection de flamme - Google Patents

Circuit de détection de flamme Download PDF

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Publication number
EP0635638A2
EP0635638A2 EP94109218A EP94109218A EP0635638A2 EP 0635638 A2 EP0635638 A2 EP 0635638A2 EP 94109218 A EP94109218 A EP 94109218A EP 94109218 A EP94109218 A EP 94109218A EP 0635638 A2 EP0635638 A2 EP 0635638A2
Authority
EP
European Patent Office
Prior art keywords
ignition
circuit
coil
primary winding
flame
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
EP94109218A
Other languages
German (de)
English (en)
Other versions
EP0635638A3 (fr
EP0635638B1 (fr
Inventor
Odd Peters
Dieter Teutsch
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
BERU RUPRECHT GmbH and Co KG
BERU Ruprecht GmbH and Co KG
Beru Werk Albert Ruprecht GmbH and Co KG
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
Priority claimed from DE4324863A external-priority patent/DE4324863C2/de
Application filed by BERU RUPRECHT GmbH and Co KG, BERU Ruprecht GmbH and Co KG, Beru Werk Albert Ruprecht GmbH and Co KG filed Critical BERU RUPRECHT GmbH and Co KG
Publication of EP0635638A2 publication Critical patent/EP0635638A2/fr
Publication of EP0635638A3 publication Critical patent/EP0635638A3/fr
Application granted granted Critical
Publication of EP0635638B1 publication Critical patent/EP0635638B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/004—Using semiconductor elements
    • 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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
    • F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
    • F02P3/053—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • 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
    • F02P2017/123—Generating additional sparks for diagnostics
    • 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
    • F02P2017/126—Measuring ionisation of combustion gas, e.g. by using ignition circuits for burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/22—Timing network
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage

Definitions

  • the invention relates to a circuit arrangement for flame detection for a transistor coil ignition of a burner, which has a control stage which controls a power transistor located in the circuit of the primary winding of an ignition coil.
  • a transistor coil ignition the construction and mode of operation of which are known per se, is provided as an ignition device in burners operated with gas, diesel fuel, gasoline or other fuels. It is desirable to monitor the burner flame, ie to provide flame detection and ignition diagnosis.
  • the object on which the invention is based is to design the circuit arrangement of the type mentioned at the beginning in such a way that reliable detection of the flame is possible with less circuitry complexity.
  • the circuit arrangement according to the invention allows the entire transistor coil ignition, in which it is provided, to be designed simply and compactly in the form of a complete device.
  • the development specified in claim 6 allows an additional diagnosis for the detection of shunt and interruption as well as short circuit of the ignition system in the ignition phase, in addition to the flame detection in the flame detection phase.
  • a conventional transistor coil ignition is shown in a block diagram, which is provided with an embodiment of the circuit arrangement according to the invention for flame detection.
  • the transistor coil ignition consists of an ignition coil ZS, a power transistor Tr2 with a Zener diode ZD1 for voltage limitation and a current sensor R2 for current detection.
  • the control stage of the transistor coil ignition is formed from a comparator K1, at the input of which one of two current setpoints Isoll1 and Isoll2 is used, which are used for control during any ignition phase and during any flame detection phase.
  • the respective time periods for these two phases are determined by a timing element ZG1, which switches a switch S1 with two contacts for the two current setpoints, so that, depending on the switch position, a corresponding current setpoint is at the input of the comparator K1. Due to this training, simultaneous ignition and flame detection is not possible.
  • At the second input of the comparator K1 is the actual current value of the current flowing through the primary winding of the ignition coil ZS when the power transistor Tr2 is switched on, which current is detected by the current sensor R2 and is in the form of a resistor Has.
  • the comparator K1 controls a flip-flop FF1 with a clock input CP, the non-inverting output Q of which lies at a driver stage, in the present case from transistors Tr1a and Tr1b connected in push-pull.
  • the power transistor Tr2 is driven via the driver stage in order to charge the primary winding of the ignition coil ZS.
  • the current setpoint Isoll1 While in the ignition phase, the current setpoint Isoll1 is at the comparator K1, so that the current flow through the primary winding of the ignition coil ZS is sufficient to trigger an ignition spark at the spark gap FS, i.e. when the power transistor Tr2 is blocked.
  • the current setpoint Isoll2 at the comparator K1 which is below the current setpoint Isoll1 and ensures a current flow through the primary winding of the ignition coil ZS, which is reduced to such an extent that there is no sparkover at the electrodes non-conductive media e.g. Air or a gas mixture can be done.
  • the spark gap FS If, however, a flame is present on the spark gap FS, the spark gap FS is ionized and thus in a conductive state, so that a sparkover occurs, since no ionization work has to be carried out by the voltage on the spark gap FS.
  • the amplitude of the pulses occurring on the secondary side of the ignition coil ZS, ie on the spark gap FS, should be set as a function of the length of the spark gap FS, ie the electrode spacing and / or the flow velocity of the gas mixture and / or the flame velocity. At higher speeds there is an expansion of the ionization channel, which increases the Electrode distance corresponds to the conditions when the gas mixture is at rest.
  • This setting can be made via a corresponding choice of the level of the value IS0112 on the comparator K1, which is possible, for example, by means of a generator which supplies a variable voltage, for example a ramp generator instead of the switch S1.
  • a sparkover is monitored by a flame detection device which, according to FIG. 1, consists of a rectifier Glr1, a memory element in the form of an RC element R3, C2 and a comparator K2, which detects the signal from the primary winding of the ignition coil ZS after blocking the power transistor Tr2 Evaluates the presence of a flame in the flame detection phase.
  • a flame detection device which, according to FIG. 1, consists of a rectifier Glr1, a memory element in the form of an RC element R3, C2 and a comparator K2, which detects the signal from the primary winding of the ignition coil ZS after blocking the power transistor Tr2 Evaluates the presence of a flame in the flame detection phase.
  • the signal present at the cathode of the diode D1 is integrated via the RC element R3, C2 and evaluated via the comparator K2 by means of a comparison with a setpoint value at the other input of the comparator K2.
  • an ignition diagnosis device ZüD1 can also be provided, which checks the ignition system for shunt and interruption on the secondary high-voltage side in the ignition phase.
  • Such an ignition diagnosis device is known per se.
  • the reference value Isoll1 is at the comparator K1. That means the ignition is in the ignition phase, the duration of which is determined by the timer ZG1. In this ignition phase, in addition to the ignition, there is a simultaneous ignition diagnosis via the ignition diagnosis device ZüD1 so that the spark gap FS is examined for interruptions and shunt of the electrodes.
  • the timing element ZG1 switches the reference value Isoll2 to the comparator K1 via the switch S1.
  • the primary charging current of the ignition coil ZS detected by the current sensor R2 is reduced to such an extent that no flashover can take place on the spark gap FS without a flame.
  • points A and B in the circuit diagram of FIG. 1 there are signals with the course shown in FIG. 2.
  • the stress on the ignition coil ZS that occurs when a flame is present cannot be caused by a sparkover at the spark gap FS as a result of the explain ionizing work, so that the energy required for the sparkover is much lower than with non-ionized and non-conductive media such as air or other gas mixtures.
  • the signal present at point A with or without pulse peaks (FIG. 3, FIG. 4) is rectified via the rectifier Glr1 and smoothed via the integrator R3, C2.
  • the smoothed voltage is applied to the comparator K2, which compares it with a reference voltage USOLL.
  • Uout Depending on the signal state at point A, there is an output signal Uout from comparator K2, which leads to a corresponding display on display device A1.
  • the error signal thus formed can be used for further processing.
  • FIG. 5 shows the schematic circuit diagram of a further exemplary embodiment of the circuit arrangement according to the invention, which differs from the exemplary embodiment illustrated in FIG. 1 on the one hand by the design of the circuit device which, in the flame detection phase, limits the charging current flowing via the primary winding of the ignition coil ZS to a current intensity , which is below the charging current required to generate a spark in the ignition phase.
  • this circuit device consisted of a timer ZG and a switch S1 actuated by the timer ZG
  • this circuit device is formed by a ramp generator RG1, the output voltage of which is in the form of a Irp at the comparator K1.
  • the embodiment shown in Fig. 5 Circuit arrangement according to the invention also differs from the exemplary embodiment shown in FIG. 1 in that the value Iactual, that is to say the actual current value of the current flowing via the primary winding of the ignition coil ZS when the power transistor Tr2 is switched through, not only at the input of the comparator K1 but also on a display device designed as a signal evaluation device A1 lies.
  • Iactual that is to say the actual current value of the current flowing via the primary winding of the ignition coil ZS when the power transistor Tr2 is switched through
  • the embodiment shown in FIG. 5 is particularly suitable for making a statement about the flow velocity of the flame or the gas mixture in the combustion chamber via the amplitude of the flame detection pulses.
  • pulses are switched to the spark gap FS with increasing voltage amplitude. This is achieved via the ramp generator RG1, whose output voltage increases linearly with time.
  • the ramp generator RG1 whose output voltage increases linearly with time.
  • pulses with increasing amplitude are then generated on the secondary side of the ignition coil ZS. Since the ionization channel, i.e. the actual spark gap FS increases at higher speeds of the gas mixture or at higher flame speeds, the height of the amplitude of the pulses at the spark gap FS, which is necessary in order to cause a flashover, provides information about the flame or gas mixture speed.
  • the evaluation circuit supplies the signal Uout from the rectifier Glr1, the integration element R3, C2 via the comparator K2, which signal is present at the display device A1.
  • the value of the primary charging current Iact which at this point in time, ie at the point in time at which the signal Uout occurs at the comparator K2, is likewise on the display device A1.
  • the display device A1 is designed as a signal processing device so that the input values are stored and as a measure for the speed of the flame or the gas mixture can be evaluated and used.
  • the embodiment of the circuit arrangement according to the invention shown in FIG. 5 thus offers the further possibility, compared to the embodiment shown in FIG. 1, not only to carry out a flame detection but also to obtain information about the speed of the flame or of the gas mixture to be ignited.
  • spark gap FS is also examined in the flame detection phase for an interruption in the high-voltage connections, which is also possible with the flame detection via the either loaded or unloaded ignition coil ZS.
  • the circuit arrangement described above can be produced inexpensively, but it nevertheless offers the possibility of reliable flame detection and an additional ignition diagnosis in order to rule out fault detections.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Control Of Combustion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP94109218A 1993-07-23 1994-06-15 Circuit de détection de flamme Expired - Lifetime EP0635638B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4324863A DE4324863C2 (de) 1993-07-23 1993-07-23 Schaltungsanordnung zur Flammerkennung
DE9311065U DE9311065U1 (de) 1993-07-23 1993-07-23 Schaltungsanordnung zur Flammerkennung
DE4324863 1993-07-23

Publications (3)

Publication Number Publication Date
EP0635638A2 true EP0635638A2 (fr) 1995-01-25
EP0635638A3 EP0635638A3 (fr) 1995-06-21
EP0635638B1 EP0635638B1 (fr) 1998-11-25

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ID=25927979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109218A Expired - Lifetime EP0635638B1 (fr) 1993-07-23 1994-06-15 Circuit de détection de flamme

Country Status (2)

Country Link
EP (1) EP0635638B1 (fr)
DE (1) DE9311065U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109780569A (zh) * 2019-01-25 2019-05-21 珠海格力电器股份有限公司 基于Buck原理的脉冲点火电路和燃气壁挂炉

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5406921A (en) * 1993-11-08 1995-04-18 Chrysler Corporation Misfire detection method
US5526788A (en) * 1993-11-08 1996-06-18 Chrysler Corporation Auto-ignition detection method
FR2717534B1 (fr) * 1994-03-17 1996-05-15 Eyquem Générateur d'allumage haute énergie notamment pour turbine à gaz.
DE102009046097B9 (de) * 2009-10-28 2013-08-08 Aev Energy Gmbh Verbrennungsmotorüberwachungsverfahren und -vorrichtung
DE102011100510B4 (de) * 2011-04-28 2014-02-13 Aev Energy Gmbh Verbrennungsmotorüberwachungsverfahren und -vorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167767A (en) * 1976-07-15 1979-09-11 Bicosa Societe De Recherches Flame or spark detection system and combustible gas ignition device
US4557236A (en) * 1983-12-29 1985-12-10 Automotive Engine Associates Combustion roughness servo control to control fuel/air metering or EGR metering to an internal combustion engine
DE4130013A1 (de) * 1990-09-28 1992-04-02 Prestolite Wire Corp Direktfunkenzuendsystem mit einzelnen klopfueberwachungssensoren
WO1992020912A1 (fr) * 1991-05-15 1992-11-26 Siemens Automotive S.A. Procede et dispositif de detection de defauts d'allumage dans un cylindre de moteur a combustion interne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167767A (en) * 1976-07-15 1979-09-11 Bicosa Societe De Recherches Flame or spark detection system and combustible gas ignition device
US4557236A (en) * 1983-12-29 1985-12-10 Automotive Engine Associates Combustion roughness servo control to control fuel/air metering or EGR metering to an internal combustion engine
DE4130013A1 (de) * 1990-09-28 1992-04-02 Prestolite Wire Corp Direktfunkenzuendsystem mit einzelnen klopfueberwachungssensoren
WO1992020912A1 (fr) * 1991-05-15 1992-11-26 Siemens Automotive S.A. Procede et dispositif de detection de defauts d'allumage dans un cylindre de moteur a combustion interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109780569A (zh) * 2019-01-25 2019-05-21 珠海格力电器股份有限公司 基于Buck原理的脉冲点火电路和燃气壁挂炉
CN109780569B (zh) * 2019-01-25 2020-06-26 珠海格力电器股份有限公司 基于Buck原理的脉冲点火电路和燃气壁挂炉

Also Published As

Publication number Publication date
EP0635638A3 (fr) 1995-06-21
DE9311065U1 (de) 1993-09-09
EP0635638B1 (fr) 1998-11-25

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