EP0654604A1 - Verfahren und Vorrichtung einer Spulenzündung mit zusätzlichen Entladungen zur Diagnose - Google Patents

Verfahren und Vorrichtung einer Spulenzündung mit zusätzlichen Entladungen zur Diagnose Download PDF

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Publication number
EP0654604A1
EP0654604A1 EP94402617A EP94402617A EP0654604A1 EP 0654604 A1 EP0654604 A1 EP 0654604A1 EP 94402617 A EP94402617 A EP 94402617A EP 94402617 A EP94402617 A EP 94402617A EP 0654604 A1 EP0654604 A1 EP 0654604A1
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EP
European Patent Office
Prior art keywords
primary
current
diagnostic
spark
duration
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EP94402617A
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English (en)
French (fr)
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EP0654604B1 (de
Inventor
Bernard Boucly
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Marelli France SAS
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Magneti Marelli France SAS
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    • 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
    • F02P3/045—Layout of circuits for control of the dwell or anti dwell time
    • F02P3/0453—Opening or closing the primary coil circuit with semiconductor devices
    • F02P3/0456—Opening or closing the primary coil circuit with semiconductor devices using digital techniques

Definitions

  • the subject of the invention is a method and an electronic ignition device, for an internal combustion engine with controlled ignition, in each cylinder of the engine, by at least one spark plug in series with a secondary of an ignition coil, of which the primary is supplied with electric current from an electric source, such as the battery of a vehicle equipped with the engine, by a switch placed in a charging circuit of the primary, and itself controlled by a calculation unit and control, advantageously comprising a microcontroller.
  • the invention more specifically relates to a method and a device of the type mentioned above, making it possible to carry out a diagnosis of the ignition of the engine, by virtue of the calculation and control unit, or calculator, which manages the ignition function as well as possibly the injection function, when the engine is equipped with an injection fuel supply installation, the calculation and control unit then being a so-called "engine control" computer.
  • the method and the device according to the invention are intended to be implemented not only on board vehicles, but also on control and diagnostic apparatus in service stations.
  • the ignition diagnosis consists in giving qualitative information relating to the sparks produced by the spark plugs in the combustion chambers of the engine. This information must make it possible to determine whether there is absence or presence of a spark, and, in the latter case, whether the spark is correct.
  • An ignition device with ignition diagnosis of the second type mentioned above, was proposed by the applicant in European patent application EP 559 540: it comprises, on the one hand, means for measuring the current of load, intended to provide, on an output, a signal in response to overshoots of a determined value, lower than the current necessary to create the ignition voltage at the secondary of the coil by breaking the primary current, and, on the other hand , means for transposing the primary voltage, to form the image of the secondary voltage and provide, on said output, a signal when the secondary voltage falls below a determined threshold indicating the end of the spark at the spark plug.
  • transposition means comprise, in series between the terminal of the primary not connected to the source and the ground, the emitter-collector junction of a transistor and of the collector and emitter resistors, so that the voltage at the terminals of one of the resistors is representative of the difference between the voltage across the primary and the source voltage.
  • a first drawback of such a device is that it does not allow, in a simple manner, to discriminate sparks from different cylinders, at high speed, due to a superposition between the transpositions of the secondary voltages and the primary charges. For example, in an inline four-cylinder four-stroke engine, the charge of the primary of the coil of cylinder No. 3 may begin while the spark to the spark plug of cylinder No. 1 is not completed.
  • the object of the invention is to remedy the drawbacks of the aforementioned device known from EP 0 559 540, and to propose a method and a device allowing a control of the quality of the ignition by detecting whether the spark is of a duration. neither too short nor too long, and if the spark is of sufficient quality for a sufficient time.
  • Another object of the invention is to propose a method and a device making it possible moreover to monitor the wear of the spark plug, or, more generally, the degradation of the secondary circuit which comprises it in series with the secondary of the coil and a resistive interference suppression wire, for example built into the spark plug.
  • Yet another object of the invention is to propose a method allowing an implementation by a device of which numerous components can be common to all the engine cylinders, and therefore in single copy in a more economical and less bulky embodiment device .
  • Another aim is to propose an ignition diagnostic method which is also compatible with the calculation and control of the charging time of the primary, in the manner already known, in particular by the aforementioned document EP 559 540, the method according to the invention. being able to be implemented by a device which is structurally only little different from the known devices for carrying out this calculation and this control of the charging time of the primary.
  • the idea underlying the invention is that an image of the quality of the spark at the candle is given by the dynamic impedance of this candle during the spark, and that the observation of the intensity d '' a current which is made circulate in the primary of the coil, during the spark, makes it possible to analyze the speed of increase for at least one diagnostic duration, this speed of increase in the intensity of the primary current depending in particular on the dynamic impedance of the spark plug during the spark.
  • the quality of the spark is determined from the measurement of the rate of increase of the intensity of the current flowing in the primary of the coil during at least one diagnostic duration determined during the duration of the assumed spark.
  • the discrimination of the speeds of increase of the intensity of the current in the primary during each duration of diagnosis can be ensured by comparison with at least a corresponding threshold, to deliver a signal of presence of spark in the event of exceeding this corresponding threshold , but, in an implementation variant particularly simple, the intensity of the current in the primary is measured for at least each diagnostic duration, and the increase rates are discriminated by comparing the maximum intensity measured at the end of the corresponding diagnostic duration with a threshold of corresponding intensity, to deliver a spark presence signal if the maximum intensity measured is greater than the intensity threshold.
  • the method consists in controlling at least two successive diagnostic durations between two successive charge durations, and in deducing therefrom, on the one hand, the presence of a spark if at least one presence signal is delivered in a first interval of predetermined time, following the end of the previous charge duration, and ending at the earliest at the same time as the first diagnostic duration, and, on the other hand, a minimum duration of a spark of sufficient quality depending on the number of presence signals issued.
  • the method may further consist in deducing that the spark is too short if a second presence signal is not delivered in a second predetermined time interval, greater than the first time interval, also following the end of the duration of the previous charge, and ending at the earliest at the same time as the second duration of the diagnosis.
  • the method also consists in controlling a third diagnostic duration between two successive charging durations, and in deducing therefrom that the spark plug is short-circuited if a third presence signal is delivered before the end of a third predetermined time interval, also following the end of the previous charge duration, greater than the first and, where appropriate, the second predetermined time interval, and ending at the earliest at the same time as the third diagnostic duration.
  • the method can also consist in measuring the maximum current intensity in the primary during at least one diagnostic duration of the same rank after successive charging durations, in comparing the measurements between them and / or at least a maximum intensity threshold, and to deduce therefrom at least one signal testifying to the degradation of the secondary circuit.
  • the switch is controlled, from a control output of the calculation and control unit, by means of an interface amplifier
  • the means for measuring the current in the primary comprise a shunt in series with the switch, between the latter and the ground
  • the detection means comprise at least a first and a second comparator, each receiving the signal of the shunt on an input and comparing it respectively to a first and to a second intensity threshold, received on another input of the corresponding comparator, the output of each comparator being connected to a diagnostic input of the calculation and control unit, the second intensity threshold being greater than the first, but less the current necessary to create an ignition voltage by cutting the primary, for the calculation by said unit of the primary charge times.
  • the calculation and control unit comprises a second diagnostic input, connected to the shunt, and transmitting the measurement of the current intensity to an analog / digital converter, itself connected means for storing and comparing the maximum intensity values, measured during the diagnostic durations, with each other and / or at a maximum intensity threshold, and means delivering a degradation signal of the secondary circuit.
  • the ignition device comprises means for measuring the current in the primary, detection means, a calculation and control unit, and, optionally, an interface amplifier, which are common to all the engine cylinders.
  • the device is intended for the ignition of a combustion chamber of an internal combustion engine, equipped with at least one spark plug 10, placed in series with the secondary 12 d an ignition coil 11.
  • the primary 13 of the coil 11 is connected to a power source (vehicle battery in general), of voltage Vbat.
  • Vbat vehicle battery in general
  • the primary 13 and the secondary 12 have a common terminal connected to the collector of a bipolar transistor 14 of NPN type, the emitter of which is connected to ground by the intermediate of a shunt resistor 15.
  • the shunt 15 is thus in series in the charging circuit of the primary 13 from the source Vbat, between the ground and the ignition transistor 14, serving as a switch or switch of cut-off, which can switch from the blocked state to the saturated state and vice versa, to control the primary current Ip, which flows through the primary 13 when the transistor 14 is conductive in the saturated state.
  • This switch 14 is controlled to close and open from a calculation and control unit 16, via an amplifier 17 serving as an interface between the base of transistor 14 and unit 16 , which is an engine control computer, of the microcontroller type, comprising at least one microprocessor, and having at minus an output S giving the control information to the amplifier 17.
  • the shunt 15 is used to measure the primary current Ip, and supplies at its terminals a voltage representative of this current.
  • This information from the shunt 15, and relating to the intensity of the primary current Ip is processed, in analog form or in logical or digital form, by a threshold detector 18 connected to at least one input E of the computer 16, making it possible to receive diagnostic information on the presence and quality of a spark produced between the two spark plug electrodes 10 and generated by the secondary 12 of the ignition coil 11 by cutting the charge on the primary 13.
  • FIG. 1 represents the device for a single candle 10 in a single cylinder, so as not to overload the figure, but the means for measuring the primary current constituted by the shunt 15, the calculation and control unit 16, the interface amplifier 17 and the detection means consisting of the threshold detector 18 are common to all the spark plugs 10 of all the cylinders, to which they are connected by selection diodes (not shown) in a known manner, and are therefore each provided in single copy in the circuit.
  • curve (a) represents a timing diagram of the control signal of switch 14 applied to the output S of unit 16.
  • Curves (b) and (c) respectively represent the intensity of the primary current Ip and the secondary current Is as a function of time
  • curve (d) represents the signal applied by the detector 18 to the input E of the unit 16.
  • the unit 16 On its output S, the unit 16 cyclically applies an output signal from the instant t0 of closing of the switch 14 until the instant tl of break.
  • the primary current Ip gradually increases as shown on curve (b).
  • Ip In approximately 1 ⁇ s after the cut-off instant t1, Ip is canceled from its maximum value of the order of 6 A, sufficient for its cut-off to give the required ignition voltage across the plugs of the spark plug 10, and the secondary current Is very quickly takes its maximum value of the order of 60 mA, as shown on curve (c). From this maximum value, Is gradually decreases, while Ip is zero.
  • the unit 16 applies on its output S a command to close the switch 14 for three successive diagnostic times, preferably of the same value, and spaced in the time, t3-t2, t5-t4 and t7-t6.
  • the primary current Ip increases progressively from the start t2, t4 or t6 of each diagnostic duration to cancel out quickly at the break in t3, t5 or t7 at the end of each diagnostic duration, as shown on the curve (b ).
  • the duration of the spark T t8-t1 is l order of 1.5 ms, under normal ignition conditions, it corresponds to each pulse of a chosen positive sign of primary current Ip a pulse of a chosen negative sign of secondary current Is, which is practically no longer sensitive outside the spark time T.
  • the impedance Z of the plug 10 is low (of the order of 20 to 100 k ⁇ ). After the spark (after t8), the impedance Z is high (greater than 1 M ⁇ ).
  • the rate of increase of Ip is of the order of 50 A / ms, whereas in the absence of 'spark, this rate of increase ⁇ ' is of the order of 2 A / ms.
  • This increase rate of Ip corresponds to the speed gradients during the diagnostic times, which are calibrated to a constant value of the order of 20 ⁇ s for example.
  • This speed of increase of Ip can therefore be expressed by the ratio of the maximum intensity of this current at the end t3, t5 or t7 of each diagnostic duration over said diagnostic duration, or more simply still, by the values of maximum intensity.
  • the strong gradients (50 A / ms) are discriminated from the weak gradients (2 A / ms) by the detector 18, comprising for example a threshold comparator.
  • the threshold Io can be calibrated to a constant and unique value for all the diagnostic durations, and be fixed for example at 1 A.
  • the detector 18 applies to the input E of the unit 16 a non-zero signal, as shown in (d) in FIG. 2.
  • the signals transmitted during t3-t'2 and t5-t'4 correspond to a primary current Ip> Io, during the diagnostic times t3-t2 and t5-t4, which took place before the end of the spark in t8 .
  • no signal is given on input E during the diagnostic time t7-t6 after t8, because Ip has remained below the threshold Io of 1 A during this time.
  • the signals received by the input E of the unit 16 during the diagnostic times such as t3-t2 and t5-t4 are therefore spark presence signals.
  • the specific diagnostic program implemented by the microprocessor of the unit 16 makes it possible, from the spark presence signals delivered by the detector 18, to determine that the spark has been of sufficient quality for an interval of time at less equal to t5-t1, in this example, therefore T ⁇ t5-t1, and that the spark is very likely extinguished before t7, therefore T ⁇ t7-t1.
  • the unit 16 does not receive a signal of presence of spark from the detector 18 , it delivers a spark fault diagnosis, signifying that the spark plug circuit 10 is probably open.
  • unit 16 If the unit 16 receives a first presence signal during T1 (for example t3-t'2), but no second presence signal during a predetermined time interval T2, also starting in t1 and ending at the earliest in t5 (but not after t6), unit 16 considers that there was indeed a spark, but that it was not of suitable quality for a sufficient time. Unit 16 then delivers a diagnosis of too short spark.
  • T1 for example t3-t'2
  • T2 no second presence signal during a predetermined time interval
  • the unit 16 If the unit 16 successively receives two spark presence signals during T2, including the first during T1, but no third presence signal during a third predetermined time interval T3, starting at t1 and ending at the earliest in t7 , but not before the start of the next charging time (t0), the unit 16 delivers a spark diagnosis of suitable quality for a sufficient time.
  • the unit 16 successively receives three signals of presence of spark during T3, it delivers a diagnosis of spark that is too long, signifying that the spark plug 10 is probably short-circuited.
  • the detector 18 can, during the third diagnostic time t7-t6, compare the measured current Ip to a particular short circuit threshold, for example less than 1 A.
  • the detector 18 can compare the intensity of the measured current, during each diagnostic duration, with a threshold specific to each of the diagnostic durations, especially if the latter are not of the same value.
  • the unit 16 can thus diagnose the presence or absence of a spark of suitable quality, and the duration of such a spark comprised, for example, between 0.4 ms and 2 ms.
  • the measurement of the spark duration can be taken into account by the unit 16 to adjust the value I2 of the primary current Ip for which the breaking is carried out, in order to guarantee for example a sufficient spark duration to avoid unburned, such a duration for less than 0.4 ms indicating a high probability of open circuit, while a spark duration greater than 2 ms indicating a high probability of short circuit, these two values delimiting a range of spark duration that experience has shown to be normal.
  • the amplifier 17 comprises two bipolar transistors, including one NPN type 19 connected by its base to the output S of the unit 16 via a resistor 21, while its transmitter is grounded and its collector connected by a resistor 22 at the base of the other transistor 20, of PNP type, the emitter of which is set to the voltage of the source Vbat, and the collector connected by a resistor 23 to the base of the ignition transistor 14, which comprises, on its collector connected to the primary 13, an integrated Zener diode (and not shown) in a known manner.
  • the detector 18 comprises an input RC filter 24-25, filtering the primary current measurements at the terminals of the shunt 15, and transmitting them to a negative input of a first threshold comparator 26, receiving on a positive input a threshold of voltage corresponding to the spark detection intensity threshold Io, and defined, from a logic voltage source Vcc (of + 5 V for example) via a resistance bridge 27, 28 and 29 .
  • the output of comparator 26 is connected in parallel to the voltage source + Vcc through the resistor 30 and to the input of an inverter 31.
  • the output of the RC filter 24-25 is also connected in parallel to the input positive of a second threshold comparator 32 receiving on its negative input another voltage threshold defined by the resistance bridge 27, 28 and 29 from the voltage source + Vcc.
  • the output of the comparator 32 is connected in parallel to the source + Vcc through the resistor 30 and to the input of the inverter 31, being isolated from the ground by the capacitor 33.
  • L ' together of the two comparators 26 and 32 constitutes an OR circuit, which attacks the diagnostic input E of the unit 16 via the inverter 40.
  • the comparator 26 compares the current measurements at the threshold Io, of 1 A for example, for the delivery of the spark presence signals as described above.
  • the comparator 32 compares the intensity measurements of the primary current Ip to a second intensity threshold I1, higher than that Io of the comparator 26, and for example equal to 4.5 A, to provide a signal when the load current Ip in the primary 13 exceeds this second threshold I1, when the current Ip to be cut to obtain a spark of satisfactory quality is I2, for example 6 A, as indicated on curve (b) of FIG. 2.
  • the unit 16 can determine the time t1-t'1 necessary for arrive at current I2 and, for the next ignition, determine t0 appropriately.
  • the time of the start of the charge can thus be optimally adjusted by the unit 16 without additional output from the detector 18 to the control unit 16.
  • the shunt 15, the calculation and control unit 16 and the threshold detector 18 are common to all the cylinders and to all the candles, and are therefore each mounted in a single copy in the circuit, thus more compact and economical.
  • the measurement signals of the primary current Ip at the terminals of the shunt 15 are also transmitted from the output of the RC filter 24-25 in parallel directly on a second input E 'of the computer 16 and applied to an analog / digital converter 34, itself connected to counting means, memories, registers and digital comparators 35 of the computer 16.
  • the current primary Ip, measured during the diagnostic times, is used as an analog diagnostic signal transmitted to the analog input E 'of the microprocessor of the computer 16.
  • the maximum intensities are compared of the primary current Ipmax, as measured during diagnostic times, of the same rank (for example always during the first diagnostic time) between successive charge times, and these Ipmax values are compared with one another as well as at a maximum threshold Imax of primary current intensity, adapted as a function of the order of the diagnostic duration considered in the following these diagnostic durations between two consecutive charging durations, in order to detect the decrease in the Ipmax values, as a function of the operating duration of the installation, which translates the wear of the spark plug 10 and, more generally, the degradation of the secondary circuit, comprising this spark plug 10, the secondary 12 as well as a suppressor, in series with the spark plug 10 and / or integrated into the latter.
  • the degradation of this secondary circuit results in a progressive increase in the equivalent resistance of this circuit, whence a correlative decrease in the signals of maximum intensity Ipmax, as shown in FIG. 6.
  • FIG. 6 represents four curves of Ip measured during the first diagnostic period t3-t2, curve 36 corresponding to a spark plug 10 in new condition, while curves 37, 38 and 39 correspond to the use of the same candle 10 after progressively increasing periods of use. It can be seen that the maximum intensity of the primary current Ipmax gradually decreases when the duration of use of the spark plug 10 increases, from curve 36 to curve 39.
  • the monitoring of Ipmax therefore gives an image of the degradation of the secondary circuit, and by comparison with a maximum intensity threshold Imax, for example from 1 A, we can consider that curves 36 and 37 correspond to a candle 10 in an acceptable state, because Ipmax is greater than the threshold Imax, while curves 38 and 39 correspond to a candle 10, or, more generally, to a secondary circuit too degraded, requiring for example the change of the spark plug.
  • a maximum intensity threshold Imax for example from 1 A
  • FIG. 7 shows the four curves of the secondary current Is 40, 41, 42 and 43, obtained during the sparks during which the curves 36 to 39 of Ip which were measured respectively during the first diagnostic period correspond to the peaks of negative sign of current Is visible and superimposed for the four curves 40 to 43 of FIG. 7.
  • curves 42 and 43 corresponding to sparks obtained with a candle 10 in a degraded state, reflected by the curves 38 and 39 of FIG. 6, correspond to sparks of too short duration, while the duration of the sparks of curves 40 and 41, obtained with a candle 10 in good condition, as reflected by curves 36 and 37 of the Figure 6 is sufficient to obtain a spark of suitable quality for a sufficient time.
  • diagnostic method described above can be implemented by a device (see FIGS. 1 and 3), which is both structurally little modified compared to that described in EP 0 559 540, and realization much more economical than the latter, since it does not require high voltage components.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP19940402617 1993-11-22 1994-11-17 Verfahren und Vorrichtung einer Spulenzündung mit zusätzlichen Entladungen zur Diagnose Expired - Lifetime EP0654604B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9313944A FR2712934B1 (fr) 1993-11-22 1993-11-22 Procédé et dispositif d'allumage à bobine, pour moteur à allumage commandé.
FR9313944 1993-11-22

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EP0654604A1 true EP0654604A1 (de) 1995-05-24
EP0654604B1 EP0654604B1 (de) 1998-07-29

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EP (1) EP0654604B1 (de)
DE (1) DE69412039T2 (de)
ES (1) ES2122192T3 (de)
FR (1) FR2712934B1 (de)

Cited By (9)

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EP0752580A3 (de) * 1995-07-05 1997-03-26 Telefunken Microelectron Schaltungsanordnung zur Ionenstrommessung
EP0747595A3 (de) * 1995-06-08 1998-05-20 VOGT electronic AG Vorrichtung und Verfahren zur Zündungserkennung
WO1998053198A1 (de) * 1997-05-16 1998-11-26 Daimler-Benz Aktiengesellschaft Verfahren zur erkennung klopfender verbrennung bei einer brennkraftmaschine mit einer wechselspannungszündanlage
GB2329971A (en) * 1997-09-11 1999-04-07 Siemens Automotive Sa Diagnostic method and device for an ignition system of an internal combustion engine
EP0848161A3 (de) * 1996-12-16 1999-12-08 Robert Bosch Gmbh Induktives Spulenzündsystem für einen Motor
EP0740072B1 (de) * 1995-04-28 2002-08-07 STMicroelectronics S.r.l. Methode und Schaltung zur Erkennung eines Zündfunkens in einer inneren Brennkraftmaschine
FR2820465A1 (fr) * 2001-02-05 2002-08-09 Siemens Automotive Sa Procede et dispositif de commande d'une bobine d'allumage d'un melange air/carburant dans un moteur a combustion interne
CN107178454A (zh) * 2017-07-28 2017-09-19 中国第汽车股份有限公司 一种天然气发动机点火能量闭环控制方法
EP3306075A1 (de) * 2016-10-07 2018-04-11 Caterpillar Energy Solutions GmbH Zündkerzenüberwachung in einer brennkraftmaschine

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DE10133005B4 (de) * 2001-07-06 2014-10-23 Volkswagen Ag Verfahren und Vorrichtung zum Erkennen der Unterbrechung der Spannungsversorgung einer Zündspule
EP3276156B1 (de) * 2016-07-29 2025-06-25 Caterpillar Motoren GmbH & Co. KG Verfahren zur bestimmung eines defekts in einer zündkerze eines verbrennungsmotors
DE102016115980B4 (de) 2016-08-26 2018-09-20 Krohne Messtechnik Gmbh Zündgenerator und Verfahren zum Erzeugen von elektrischen Zündfunken zum Zünden von Plasmen in Mikrosystemen

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WO1992020912A1 (en) * 1991-05-15 1992-11-26 Siemens Automotive S.A. Method and device for detection of ignition failures in an internal combustion engine cylinder
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US5174267A (en) * 1991-07-22 1992-12-29 Ford Motor Company Cylinder identification by spark discharge analysis for internal combustion engines
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DE2752244A1 (de) * 1977-11-23 1979-06-07 Baum Elektrophysik Gmbh Verfahren und vorrichtung zum pruefen elektrischer zuendanlagen von otto-motoren
EP0142817A2 (de) * 1983-11-19 1985-05-29 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Prüfverfahren für Zündanlagen von Brennkraftmaschinen in Kraftfahrzeugen
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0740072B1 (de) * 1995-04-28 2002-08-07 STMicroelectronics S.r.l. Methode und Schaltung zur Erkennung eines Zündfunkens in einer inneren Brennkraftmaschine
EP0747595A3 (de) * 1995-06-08 1998-05-20 VOGT electronic AG Vorrichtung und Verfahren zur Zündungserkennung
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CN107917032A (zh) * 2016-10-07 2018-04-17 卡特彼勒能源方案有限公司 火花塞状态监测
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CN107917032B (zh) * 2016-10-07 2021-09-24 卡特彼勒能源方案有限公司 火花塞状态监测
CN107178454A (zh) * 2017-07-28 2017-09-19 中国第汽车股份有限公司 一种天然气发动机点火能量闭环控制方法

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DE69412039D1 (de) 1998-09-03
FR2712934B1 (fr) 1996-01-26
DE69412039T2 (de) 1999-04-01
FR2712934A1 (fr) 1995-06-02
EP0654604B1 (de) 1998-07-29
ES2122192T3 (es) 1998-12-16

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