• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:AT510034A4
    申请号:T0132810
    申请日:2010-08-06
    公开日:2012-01-15
    发明作者:
    申请人:Ge Jenbacher Gmbh & Co Ohg；
    IPC主号:
    专利说明:

    1
    The invention relates to a method for determining the timing of the extinguishing of a spark of an ignition device for an internal combustion engine, wherein the ignition device comprises a high voltage transformer having a primary side and a secondary side, of which the primary side with a high voltage source and the secondary side with a spark gap to form the Ignition spark is connected and an ignition device for an internal combustion engine, comprising: - a high voltage transformer, in particular a coil having a primary side and a secondary side, - a high voltage source electrically connected to the primary side, - a spark gap electrically connected to the secondary side and an internal combustion engine with a such ignition device. For a reliable ignition and ignition of the combustible mixture as long as possible Zündfunkenbrenndauer is desired.
    The ignition of fuel mixtures can be done by a variety of methods. In internal combustion engines, such as a gas engine, in most cases, the ignition is realized by means of a spark. There are several methods of generating sparks, mainly using an ignition coil ignition system. It is for the ignition of the fuel mixture, mainly via the spark channel, introduced plasma energy (ionization and activation energy) crucial for the quality of the subsequent combustion process. For safe ignition or ignition of the fuel mixture, in addition to the height of the spark current, also significantly the spark duration is crucial. Indirect and direct influences, such as pressure, temperature, mixture composition and flow rates in the combustion chamber, especially in the area of the spark plug electrodes or spark gap, can significantly influence the spark duration. To assess the effectiveness of an ignition process thus the detection of the spark duration is crucial. As a way of measuring the spark duration, the direct dependence on the current in the high-voltage circuit (secondary current of the ignition coil), which equates to the spark current, can be used. These possibilities of direct measurement of the spark duration is not possible in most ignition systems, especially in central ignition systems, where only the primary side of the ignition coils is connected to the ignition system, and no measures from the secondary side can be traced. 68547-36 / fr * * * * M f ♦ + * «** · *« # * · · • 4 · I t φ I! * ···················································································. * 2
    From the patent literature, some approaches to the diagnosis of ignition events are known.
    For example, EP 707 144 A2 (ROBERT BOSCH GMBH) describes the use of current measuring pliers for the diagnosis of ignition events, wherein a first resonant circuit is provided whose resonant frequency is matched to rapid ignition current changes that occur during the start of the spark and a second oscillatory circuit is provided, its resonance is geared to slow Zündstromänderungen present during Zündflinkenbrenndauer.
    WO 1994/027043 (ROBERT BOSCH GMBH) proposes a method for detecting misfires. Here the transformed firing voltage on the primary side is used and a comparison with limit values for a correct ignition is carried out.
    The currently used methods do not provide information on the spark duration itself, but compare a magnitude measured at the primary side (such as the burn voltage) with previously detected limits for proper ignition timing.
    To assess the effectiveness of an ignition process, the detection of the timing of the extinguishment of the spark is crucial.
    It is therefore an object of the present invention to provide a method which enables the detection of the time of extinction of the spark and to provide an ignition device which can operate according to this method.
    The object is achieved by the method according to claim 1 and an ignition device according to claim 9.
    The present invention is based on a measurement of the timing of the extinguishment of the spark with the aid of the primary current of a high voltage transformer, normally an ignition coil.
    Investigations of the primary and secondary circuit sizes of an ignition coil and the spark have shown that with the help of the current flow of the primary current of an ignition coil, the time of extinguishing the spark can be determined. • * a * * ** f · * · »··· f I # * * · ·· I« * * · »• * I * M * f * ♦ * 3
    Advantageous embodiments of the invention are defined in the dependent claims.
    The ignition process can generally be divided into four phases: 1. ionization phase - build-up of the necessary high voltage and ionization for breakthrough 2. breakthrough phase - structure of the spark channel 3. spark burning phase - energy transfer into the fuel mixture with the help of plasma energy 4. bobbin freewheel phase - degradation of stored in the coil Energy after extinction of the spark
    Each of the individual phases of the spark has a typical characteristic, recognizable, for example, from the different pitch angles of the primary current, caused by the influencing variables acting on these phases on the primary current of the ignition coil.
    If, for example, lines (linear functions) are placed in the current curves of phases 3 and 4 and these lines are cut, then the position of the points of intersection can be used to easily determine the time at which the spark extinguished. The use of other functions is also conceivable. For the determination of the spark duration, the measurement of the time of extinction of the spark according to the invention may be sufficient if the time at which the spark originated can be derived from other data or is simply assumed to be known.
    Of course, it can also be provided to determine the time of the formation of the spark from the time course of the primary current through the transition from the ionization phase into the spark-burning phase.
    The ignition spark duration determined in this way can be used as a controlled variable for the primary-side energy supply to the ignition coil, in order to adapt the spark characteristic to the conditions in the combustion chamber, and thus to optimize the ignition and combustion process. • 4 ft * * ft «·» »» »* * * * * ··························································································································································· 4
    This essentially prevents slow or delayed combustion and further leads to a lower variance of the combustion process and thus to a more complete combustion of the fuel mixture, which is equivalent to a higher efficiency or efficiency increase of the overall system of a combustion process.
    Further advantages and details of the invention will become apparent from the figures and the associated description of the figures.
    Showing:
    1 shows an ignition device according to the prior art,
    2 shows an ignition device according to the invention,
    3 shows a further embodiment of an ignition device according to the invention,
    Fig. 4 shows an internal combustion engine with an ignition device according to the invention and
    Fig. 5 is a representation of the time course of the primary current and the
    Representation of the four distinguishable phases of the primary current profile.
    Fig. 1 shows an ignition device according to the prior art, this has a high voltage transformer 3, which has a primary side 4 and secondary side 5. In the present case, the high voltage transformer 3 is formed as a coil. The primary side 4 is connected to a high voltage source 6 to 9. The individual components of the high voltage source are a DC voltage source 6, a high voltage capacitor 7, a freewheeling diode 8 and a switching element 9.
    The secondary side 5 of the high voltage transformer 3 is connected to a spark gap 10 for the formation of the spark.
    In Fig. 1, a connected to the secondary side 5 of the high voltage transformer 3 ammeter is shown, by means of which the secondary current can be measured to ground. In this way, the determination of the spark duration is possible. However, the measurement according to FIG. 1 is not possible in the vast majority of ignition systems, since in most ignition systems only the primary side 4 of the high-voltage transformer 3 is connected to the ignition system and no measured variables can be fed back from the secondary side 5. - * »* · · · · · · * ····························································································································································································································· · 4 · »· * ..... * 5
    FIG. 2 shows an ignition device 1 according to the invention, in which the method according to FIG. 1 would not be applicable at all. The same components as in Fig. 1 are denoted by the same reference numerals. According to the invention, it is now provided that at least one current measuring device is connected to the primary side 4 of the high-voltage transformer 3. In Fig. 2, two alternative positions for the location of the current measuring device are shown. The current measuring device of the primary current can be done either for example with a current transformer or with a measuring resistor to ground.
    FIG. 3 shows a possibility of regulating the primary energy supply for the optimization of the spark energy and the ignition spark duration with the aid of the spark duration measurement by the evaluation of the primary current measurement provided according to the invention. 2, an evaluation device 12, to which the measuring signals of the measuring device 11 (here: ammeter) can be supplied and divided into the time course of the primary current at least in a spark-burning phase and a subsequent freewheeling phase of the high-voltage transformer. The evaluation device 12 sets the transition from the spark firing phase in the freewheeling phase with the timing of the extinction of the spark equal.
    As shown in Fig. 3, the evaluation device 12 is part of a control device 13, which uses the determined by the evaluation device 12 Zündfunkendauer as a controlled variable for the primary-side power supply to the high-voltage transformer 3.
    4 shows schematically an internal combustion engine 2, of which only one piston-cylinder unit is shown with an ignition device 1 according to the invention.
    The piston-cylinder unit has a piston 14 that can be moved up and down in a cylinder 15. Visible is a spark gap 10 formed here as a spark plug 16, which is in electrical connection via a line 17 to the secondary side 5 of a high-voltage transformer 3 (here: ignition coil). The primary side 4 of the high voltage transformer 3 is connected via a line 18 to a high voltage source 6 to 9 in electrical connection. Not shown in Fig. 4 are the evaluation device 12 and the control device 13. • · · * * · · · »·» ············································································· 6
    Fig. 5 shows the course of the primary current 20 of a high voltage transformer 3, in this case an ignition coil, divided into the four characteristic phases of a spark, the ionization phase 21, the spark break-through phase 22, the spark-burning phase 23, the timing of extinguishing the spark 24 and the Zündspuienfreaufaufphase 25th
    Legend: 1 ... Ignition device 2 ... Combustion engine 3 ... High-voltage transformer (ignition coil) 4 ... Primary side of the high-voltage transformer 5 ... Secondary side of the high-voltage transformer 6 ... DC voltage source 7 ... High-voltage capacitor 8 ... Free-wheeling diode 9 ... switching element 10 ... spark gap 11 ... measuring device for primary current measurement 12 ... evaluation device 13 ... regulating device 14 ... Piston 15 ... Cylinder 16 ... Spark plug 17 ... High voltage line 18 ... line to the primary side of a high voltage transformer (ignition coil) 19 ... Measuring device for measuring the capacitor voltage 20 ... Primary current profile of the high-voltage transformer (ignition coil) 21 ... Ionization phase 22 ... Spark-through phase 23 ... Spark-burning phase 24 ... Spark break 25 ... Ignition coil freewheeling phase
    Innsbruck, on the 5th of August 2010
    权利要求:
    Claims (14)
    [1]
    Claims 1. A method for determining the time of extinguishing a spark of an ignition device (1) for an internal combustion engine (2), the ignition device (1) comprising a high-voltage transformer (3) having a primary side (4) and a secondary side (5) of which the primary side (4) is connected to a high voltage source (6-9) and the secondary side (5) is connected to a spark gap (10) for forming the spark, characterized in that the time course of the primary side (4) flowing Primary current is measured and at least in a spark-burning phase and a subsequent freewheeling phase of the high-voltage transformer (3) is divided, wherein the transition from the spark-burning phase in the freewheeling phase is equated with the time of extinction of the spark.
    [2]
    2. The method according to claim 1, characterized in that the time profile of the primary current in the spark-burning phase is represented by a first function and in the freewheeling phase by a second function and the intersection of the two functions is equated with the time of extinction of the spark.
    [3]
    Method according to claim 2, characterized in that the first and / or the second function (a polynomial function (s) of degree> 1 or linear function (s) is / are.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that in the time course of the primary current one of the spark burning immediately upstream ionization phase is identified, wherein the transition from the ionization phase is equated in the spark burning phase with the time of the formation of the spark.
    [5]
    5. The method according to claim 4, characterized in that the time profile of the primary current in the ionization phase is represented by a third function and the intersection of the first and the third function is equated with the time of the formation of the spark.
    [6]
    6. The method according to claim 5, characterized in that the first and / or the third function is / are a linear function (s). 68547-36 / on the 2nd
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the spark duration is determined based on the determined time of extinction of the spark and based on the known or determined time of the formation of the spark.
    [8]
    8. The method according to claim 7, characterized in that the determined Zündfunkendauer is used as a control variable for the primary-side power supply of the high-voltage transformer (3).
    [9]
    9. Ignition device (1) for an internal combustion engine (2), comprising: - a high voltage transformer (3), in particular a coil having a primary side (4) and a secondary side (5), - one with the primary side (4) electrically connected High-voltage source (6-9), - a spark gap (10) electrically connected to the secondary side (5), characterized by a measuring device (11) for detecting the time profile of the primary current flowing in the primary side (4), - an evaluation device (12) in which the measurement signals of the measuring device (11) can be supplied and which subdivide the time profile of the primary current into at least one spark firing phase and a subsequent freewheeling phase of the high voltage transformer, the evaluation device (12) monitoring the transition from the spark firing phase to the freewheeling phase at the time of extinguishment of the Equals spark.
    [10]
    10. Ignition device according to claim 9, characterized in that the evaluation device (12) identified in the time course of the primary current one of the spark burning immediately upstream ionization phase, wherein the evaluation device (12) the transition from the ionization phase in the spark burning phase with the time of the formation of the spark equates.
    [11]
    11. Ignition device according to claim 9 or 10, characterized in that the evaluation device (12) determines the Zündfunkendauer based on the determined time of extinction of the 3 Zündfunkens and based on the known or determined time of the formation of the spark.
    [12]
    12. Internal combustion engine (2) with an ignition device (1) according to one of claims 9 to 11.
    [13]
    13. Internal combustion engine according to claim 12, characterized in that a control device (13) is provided which uses the evaluation of the device (12) detected spark duration as a control variable for the primary-side power supply of the high voltage transformer (3).
    [14]
    14. internal combustion engine (2) according to claim 13, characterized in that it is designed as a stationary engine, preferably as a gas engine. Innsbruck, on the 5th of August 2010
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US6283103B1|1998-04-13|2001-09-04|Woodward Governor Company|Methods and apparatus for controlling spark duration in an internal combustion engine|
    EP1854998A2|2006-05-12|2007-11-14|GE Jenbacher GmbH & Co OHG|Ignition device for a combustion engine|
    DE102007051249A1|2007-10-26|2009-04-30|Robert Bosch Gmbh|Device for controlling a multiple spark operation of an internal combustion engine and associated method|CN108573803A|2017-03-09|2018-09-25|博格华纳路德维希堡有限公司|Method for operating ignition coil and ignition coil|DE3924985C2|1989-07-28|1992-11-19|Volkswagen Ag, 3180 Wolfsburg, De|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    AT0132810A|AT510034B1|2010-08-06|2010-08-06|ZÜNDFUNKENBRENNDAUERBESTIMMUNG|AT0132810A| AT510034B1|2010-08-06|2010-08-06|ZÜNDFUNKENBRENNDAUERBESTIMMUNG|
    EP11004406.2A| EP2416004B1|2010-08-06|2011-05-30|Determination of ignition spark duration|
    US13/171,860| US8662059B2|2010-08-06|2011-06-29|Determination of the burning duration of an ignition spark|
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