EP0732499B1 - Verfahren zum Auswerten von Zündimpulsen - Google Patents
Verfahren zum Auswerten von Zündimpulsen Download PDFInfo
- Publication number
- EP0732499B1 EP0732499B1 EP96109664A EP96109664A EP0732499B1 EP 0732499 B1 EP0732499 B1 EP 0732499B1 EP 96109664 A EP96109664 A EP 96109664A EP 96109664 A EP96109664 A EP 96109664A EP 0732499 B1 EP0732499 B1 EP 0732499B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- threshold
- pulses
- signal
- ignition pulses
- 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
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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
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/02—Checking or adjusting ignition timing
- F02P17/04—Checking or adjusting ignition timing dynamically
-
- 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
- F02P17/02—Checking or adjusting ignition timing
Definitions
- the invention is based on methods for evaluation of ignition pulses from a spark-ignited internal combustion engine according to the genus of claims 1 or 2.
- a trigger device has a horizontal beam deflection at Triggers a trigger pulse.
- the trigger pulse is from an ignition pulse of a reference cylinder derived.
- the trigger threshold is with a trim potentiometer adjustable. The trim potentiometer will adjusted when adjusting the ignition voltage oscilloscope. A change in the trigger threshold in later operation is not scheduled.
- the invention has for its object a method for evaluating ignition pulses of a spark-ignited Internal combustion engine specify the one has high operational reliability.
- the method provides that the threshold or the amplitude is variable and that the threshold or amplitude is set to a value where the number of firing pulses detected within an interval defined by the distance between two successive Given pulses of a reference cylinder matches an expected number.
- the method has the advantage that adaptive definition of the threshold above which the ignition pulses be evaluated, high operational reliability achieved on different ignition systems becomes.
- the increasingly used distributorless Ignition systems some of which are independent Ignition circuits can contain deviations in the amplitudes of the ignition pulses between the individual Have ignition circuits. Even with such ignition systems is a reliable evaluation of Ignition pulses given by the variable threshold.
- the method according to the invention enables Determining the threshold so that the relevant Ignition pulses just detected and glitches, their Amplitude is lower, can be suppressed. Glitches, their amplitude in the amount of the expected ignition pulses or above are from that recognized method according to the invention and it can a corresponding message will be submitted.
- the criterion for determining the threshold at which the number of firing pulses detected within an interval defined by the distance between two successive Given pulses of a reference cylinder is match an expected number must presuppose that an ignition pulse of a reference cylinder is recorded separately. Based on the known Number of cylinders of the internal combustion engine is one Engine cycle fully set. Starting from the expected number of firing pulses compared to the actually detected firing pulse is the threshold can be reliably determined.
- An advantageous embodiment of the invention The procedure sees a specification of the threshold as discrete levels.
- a particularly simple implementation the method according to the invention is by default of two stages possible, only one Switching between the two stages is required.
- FIG. 1 shows a block diagram of a measuring device, which is connected to an ignition system
- Figure 2 shows a time course of ignition pulses in one Ignition system
- Figure 3 shows a block diagram of a Measuring device.
- An ignition system 10 is shown in FIG a measuring device 11 is connected. Ignition system 10 and Measuring device 11 are separated from one another by dashed lines drawn.
- the ignition system 10 contains two ignition coils 12, 13, the respective first primary connections 14, 15, second primary connections 16, 17, first secondary connections 18, 19 and second secondary connections 20, 21.
- the secondary connections 18, 19, 20, 21 of the ignition coils 12, 13 are each connected to a ground 22 Spark plugs 23, 24, 25, 26 connected.
- the first Primary connections 14, 15 of the ignition coils 12, 13 are each connected to a switch 27, 28 which in an ignition switching device 29 are arranged.
- the second primary connections 16, 17 of the ignition coil 12, 13 lead to an ignition switch 30, he the ignition system 10 with a battery 31 connected to ground 22 connects.
- the two switches 27, 28 in the ignition switching device 29 are also each connected to ground 22.
- the one in the border of the ignition switchgear 29 points entered mean that the ignition switch 29 next to the two switches shown 27, 28 may contain further such switches.
- the points in the connecting line also mean of the second primary connections 16, 17 of the ignition coils 12, 13 that this line lead to further ignition coils can.
- the measuring lines 34, 35 are with an evaluation arrangement 36 and connected to comparators 37, 38, respectively.
- the comparators 37, 38 each give Output signals 39, 40 to a signal processing Arrangement 41 from.
- the arrangement 41 in turn inputs Output signal 42 to the evaluation arrangement 36.
- the signal processing arrangement 41 continues to receive Input signals from a cylinder counter 43 and supplied by a reference signal generator 44.
- the Reference signal generator 44 is via a further measuring line 45 and via a further contact 46 with a line connected, which leads to the spark plug 26.
- FIG. 2 shows a signal curve as a function of shown the time T that occurs in the ignition system 10.
- the voltage U is given at the contacts 32, 33 occurs.
- the waveform can initially either occur on the one contact 33. Farther it is possible to get the signals on the contacts 32, 33 to summarize, so that the one in FIG shown waveform from the superposition of two or more signals.
- the signal is called designated primary ignition signal.
- Ignition pulse whose amplitude reaches a value mainly due to the gear ratio the ignition coil between the primary and secondary windings given is.
- the four consecutive shown in Figure 2 Ignition pulses have the reference number 51, 52, 53, 54. Following the ignition pulse 51, 52, 53, 54 follows the burning phase 55, during which on the Spark plug 23, 24, 25, 26 there is a gas discharge. An opening phase follows the burning phase 55 56 on, during which the switches 27, 28 open is. With the beginning of the closing phase 50 there is a renewed one Ignition process initiated.
- FIG 2 are a first and a second threshold 57, 58 entered, the first threshold 57 from first, third and fourth firing pulses 51, 53, 54 and the second threshold 58 of all ignition pulses 51, 52, 53, 54 is exceeded. Furthermore, the temporal Distances between the individual ignition pulses 51, 52, 53, 54 entered. An interval starts there, where the amplitude of the firing pulses 51, 52, 53, 54 either the first threshold 57 or the second threshold 58 reaches and ends at the corresponding point of the subsequent impulse. As intersections of the ignition pulses 51, 52, 53, 54 with the sleepers 57, 58 each have a rising edge 59 of the ignition pulses 51, 52, 53, 54 are provided.
- a first time interval 60 lies between the first and the third ignition pulse 53, based on the first threshold 57.
- a second time interval 61 is between the third and fourth firing pulse 53, 54, also based on the first threshold 57.
- third, fourth and fifth temporal Distances 62, 63, 64 each lie between two successive ones Firing pulses 51, 52; 52, 53; 53, 54, based in each case on the second threshold 58.
- FIG 11 Another block diagram of the measuring device is shown in FIG 11 shown. Matching parts in the figures 1 and 3 have the same reference numerals.
- the Test leads 34, 35 become a signal combining arrangement 70 fed an output signal outputs to a comparator 71, the Output signal 72 of a signal processing arrangement, 73 is supplied.
- the method according to the invention is explained in more detail on the basis of the block diagrams shown in FIGS. 1 and 3 in conjunction with the signal curve shown in FIG. 2:
- the ignition pulses 51, 52, 53, 54 occurring in the ignition system 10 are tapped at the contacts 32, 33. Instead of the galvanic connection of the measuring lines 34, 35 shown in FIG. 1 to the first primary connections 14, 15 of the ignition coils 12, 13, a capacitive or an inductive coupling is also possible.
- the ignition pulses 51, 52, 53, 54 can also be tapped at another point in the ignition system 10, for example on the secondary side of the ignition coils 12, 13. Instead of the primary-side ignition signal curve shown in FIG. 2, there is then, for example, a secondary-side ignition signal curve, although the characteristic ignition pulses 51, 52, 53, 54 are present.
- the measuring lines 34 leading to the measuring device 11, 35 are usually first in a signal conditioning circuit, which is not entered in FIG. 1, prepared for further signal processing.
- a signal conditioning circuit for example can such a signal conditioning circuit a voltage divider, one Impedance converter or an amplifier circuit included.
- the signals then become the evaluation arrangement 36 fed a qualitative or performs quantitative analysis of the signals.
- Some of these Evaluations depend on the time. Such evaluations are, for example, the determination of Firing times of the individual cylinders in time follows during an engine cycle.
- evaluating in Dependence on the time is instead of that in FIG analog signal shown uses a digital signal, that by a defined level or a defined Edge devices for determining times starts or stops.
- the output signal 42 of the signal processing Arrangement 42 is such a signal, with which the evaluation arrangement 36 the time-related Makes evaluations.
- the signal 42 contains, for example Pulses that occur with each ignition pulse that occurs 51, 52, 53, 54 can be resolved. With that the signal shown in Figure 2 reliable pulses can be derived is a careful determination the threshold 57, 58 required, if exceeded by the ignition pulses 51, 52, 53, 54 each an impulse is triggered. According to the invention initially provided that the threshold 57, 58, variable is. It is considered equivalent to this measure that the threshold 57, 58 is fixed and that the amplitude of the signal is changed accordingly the arrangement of the stand mentioned at the beginning of the technique.
- the lying on the measuring lines 34, 35 Signals are fed to the comparators 37, 38, respectively.
- the signal processing arrangement 41 sets the Threshold 57, 58 initially fixed at a high value, depending on the determined time intervals and / or depending on the counting results is reduced.
- the threshold 57, 58 on a value is set at which the number of detected firing pulses 51, 52, 53, 54 within one Intervals that are determined by the spacing of two consecutive Impulse of the reference cylinder is given with an expected number. requirement for this procedure is the detection of ignition pulses a reference cylinder.
- the spark plug 26 for ignition of the reference cylinder is provided.
- the measuring line 45 is therefore on the line leading to the spark plug 26 on the other Contacting 46 connected. Instead of shown galvanic connection is both a capacitive as well as inductive coupling possible.
- the further measuring line 45 carries the tapped signal to the reference signal generator 44, which has an output signal outputs to the signal processing arrangement 41.
- the Reference signal generator contains, for example, a voltage divider, an impedance converter and / or one Amplifier and a comparator.
- the reference signal generator 44 is also said to be a pulse-like signal the comparators 37, 38 deliver this by comparison of the input signal with a threshold arises.
- the Specifying a threshold is considerably easier here possible because the input signal is clearly too identify is.
- the reference signal captured by a trigger gun that the in the secondary circuit flowing spark plug current or at least its Changes recorded.
- the reference signal generator 44 gives rise to everyone for example, the first ignition pulse 51 a signal to the signal processing arrangement 41. So that Arrangement 41 the occurring within an engine cycle Ignition pulses can determine the number the cylinder to be communicated. For this, the cylinder payer is 43 provided, for example by a Input is controlled.
- the variable threshold 57, 58 becomes set during operation so that the signal processing Arrangement 41, starting from the first Firing pulse 51, four firing pulses count until the first ignition pulse occurs, which is the ignition pulse for the Reference cylinder corresponds. In the example is a four-cylinder Internal combustion engine has been adopted.
- the signal processing arrangement 73 differs from the arrangement 41 shown in Figure 1 with respect to Specification of the threshold for the comparator 71.
- the threshold being either for individual expected firing pulses or groups of Ignition pulses can be set. From previous ones Ignition pulses can be made in advance Threshold to be specified at a time after which the next ignition pulse is expected.
- the inventive method can both be implemented in analog circuit technology as well as in run a microprocessor system.
- the detected signals are first an analog / digital conversion then subjected us to the comparative operations and evaluation methods in the number range performed.
Landscapes
- 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)
Description
Die in der Zündanlage 10 auftretenden Zündimpulse 51, 52, 53, 54 werden an den Kontaktierungen 32, 33 abgegriffen. Anstelle der in Figur 1 gezeigten galvanischen Verbindung der Meßleitungen 34, 35 mit den ersten Primäranschlüssen 14, 15 der Zündspulen 12, 13 ist auch eine kapazitive oder eine induktive Kopplung möglich. Die Zündimpulse 51, 52, 53, 54 können auch an anderer Stelle der Zündanlage 10, beispielsweise auf der Sekundärseite der Zündspulen 12, 13 abgegriffen werden. Anstelle des in Figur 2 gezeigten primärseitigen Zündsignalverlaufs ergibt sich dann beispielsweise ein sekundärseitiger Zündsignalverlauf, wobei die charakteristischen Zündimpulse 51, 52, 53, 54 jedoch vorhanden sind.
Claims (5)
- Verfahren zum Auswerten von Zündimpulsen einer fremgezündeten Brennkraftmaschine, bei dem die Amplitude der erfaßten Impulse mit einer vorgegebenen Schwelle verglichen und nur solche Impulse ausgewertet werden, welche die Schwelle überschreiten und bei dem Zündimpulse eines Bezugszylinders erfaßt werden, dadurch gekennzeichnet, daß die Schwelle (57, 58) oder die Amplitude variabel ist und daß die Schwelle (57, 58) oder die Amplitude auf einen Wert festgelegt wird, bei dem die Anzahl der erfaßten Zündimpulse (51, 52, 53, 54) innerhalb eines Intervalls, das durch den Abstand zweier aufeinanderfolgender Zündimpulse (51) des Bezugszylinders gegeben ist, mit einer erwarteten Anzahl übereinstimmt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schwelle (57, 58) in Stufen vorgebbar ist.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß zwei Stufen (57, 58) vorgesehen sind.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Zündimpulse (51, 52, 53, 54) von separaten Vorrichtungen (32, 34; 33, 35) erfaßt werden und daß jeder dieser Vorrichtungen (32, 34; 33, 35) eine separate Schwelle (57, 58) zugeordnet wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die von mehreren Vorrichtungen (32, 34; 33, 35) abgegebenen Impulse zusammengefaßt werden und daß die Schwelle (57, 58) vor dem erwarteten Zündimpuls (51, 52, 53, 54) in zeitlicher Folge umgeschaltet wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4136232 | 1991-11-02 | ||
DE4136232A DE4136232A1 (de) | 1991-11-02 | 1991-11-02 | Verfahren zum auswerten von zuendimpulsen |
EP92116797A EP0540878B1 (de) | 1991-11-02 | 1992-10-01 | Verfahren zum Auswerten von Zündimpulsen |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92116797A Division EP0540878B1 (de) | 1991-11-02 | 1992-10-01 | Verfahren zum Auswerten von Zündimpulsen |
EP92116797.9 Division | 1992-10-01 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0732499A2 EP0732499A2 (de) | 1996-09-18 |
EP0732499A3 EP0732499A3 (de) | 1997-10-29 |
EP0732499B1 true EP0732499B1 (de) | 2000-07-26 |
Family
ID=6444029
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96109664A Expired - Lifetime EP0732499B1 (de) | 1991-11-02 | 1992-10-01 | Verfahren zum Auswerten von Zündimpulsen |
EP92116797A Expired - Lifetime EP0540878B1 (de) | 1991-11-02 | 1992-10-01 | Verfahren zum Auswerten von Zündimpulsen |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92116797A Expired - Lifetime EP0540878B1 (de) | 1991-11-02 | 1992-10-01 | Verfahren zum Auswerten von Zündimpulsen |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP0732499B1 (de) |
DE (3) | DE4136232A1 (de) |
ES (2) | ES2128334T3 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3925221A1 (de) * | 1989-07-29 | 1991-01-31 | Vdo Schindling | Verfahren und schaltungsanordnung zur ueberwachung von funkenstrecken |
DE4223713A1 (de) * | 1992-07-18 | 1994-01-20 | Bosch Gmbh Robert | Vorrichtung zum Erfassen eines Signales |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2234957A1 (de) * | 1972-07-15 | 1974-01-31 | Bosch Gmbh Robert | Schaltungsanordnung zur gewinnung von elektrischen triggersignalen |
DE2343895A1 (de) * | 1973-08-31 | 1975-03-13 | Bosch Gmbh Robert | Verfahren und einrichtung zur ueberpruefung der zuendanlage von brennkraftmaschinen |
DE2431799B2 (de) * | 1974-07-02 | 1977-06-02 | Gebr. Hofmann Kg Maschinenfabrik, 6100 Darmstadt | Schaltung zur aufbereitung impulsfoermiger messignale eines induktiven gebers, der den zuendstrom in einer zuendanlage eines ottomotors abgreift |
JPS5810580B2 (ja) * | 1979-05-14 | 1983-02-26 | 自動車機器技術研究組合 | 自動車の点火装置の診断装置 |
DE3400786A1 (de) * | 1984-01-12 | 1985-07-18 | Robert Bosch Gmbh, 7000 Stuttgart | Zuendungsmessgeraet |
DE3505440A1 (de) * | 1985-02-16 | 1986-08-21 | Hermann, Horst, 8501 Oberasbach | Verfahren zur laufzustandsanalyse an verbrennungsmotoren mit elektrischer zuendanlage sowie vorrichtung zur durchfuehrung des verfahrens |
IT1206836B (it) * | 1987-01-09 | 1989-05-11 | Fiat Auto Spa | Procedimento e dispositivo per il rilievo e la segnalazione di anomalie di funzionamento dell impianto di accensione di motori a combustione interna particolarmente per autoveicoli provvisti di marmitta catalitica |
US4788505A (en) * | 1987-09-11 | 1988-11-29 | Pacific Northwest Electronics | Advance reference cylinder trigger generator |
US4847562A (en) * | 1987-09-11 | 1989-07-11 | Pacific Northwest Electronics | Ignition coil primary winding signal processing system |
DE3735234C2 (de) * | 1987-10-17 | 1995-05-11 | Opel Adam Ag | Zündüberwachungseinrichtung zur Erkennung von Zündaussetzern in einer Zündanlage für einen Verbrennungsmotor für ein Kraftfahrzeug |
DE4010839A1 (de) * | 1990-04-04 | 1991-10-10 | Bosch Gmbh Robert | Vorrichtung zur erzeugung eines triggersignals aus zuendimpulsen einer zuendanlage |
DE4011521A1 (de) * | 1990-04-10 | 1991-10-17 | Bosch Gmbh Robert | Schaltung und verfahren zum ueberwachen der funktion einer kraftfahrzeug-zuendanlage |
US5132625A (en) * | 1990-10-01 | 1992-07-21 | Actron Manufacturing Company | Distributorless ignition adapter for diagnostic oscilloscopes |
-
1991
- 1991-11-02 DE DE4136232A patent/DE4136232A1/de not_active Ceased
-
1992
- 1992-10-01 ES ES92116797T patent/ES2128334T3/es not_active Expired - Lifetime
- 1992-10-01 DE DE59209617T patent/DE59209617D1/de not_active Expired - Lifetime
- 1992-10-01 ES ES96109664T patent/ES2150619T3/es not_active Expired - Lifetime
- 1992-10-01 EP EP96109664A patent/EP0732499B1/de not_active Expired - Lifetime
- 1992-10-01 DE DE59209853T patent/DE59209853D1/de not_active Expired - Lifetime
- 1992-10-01 EP EP92116797A patent/EP0540878B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0540878A2 (de) | 1993-05-12 |
ES2150619T3 (es) | 2000-12-01 |
ES2128334T3 (es) | 1999-05-16 |
EP0540878A3 (en) | 1994-08-10 |
DE59209853D1 (de) | 2000-08-31 |
DE4136232A1 (de) | 1993-05-06 |
EP0540878B1 (de) | 1999-01-13 |
DE59209617D1 (de) | 1999-02-25 |
EP0732499A2 (de) | 1996-09-18 |
EP0732499A3 (de) | 1997-10-29 |
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