EP0455649A1 - Processes for assigning ignition signals to a reference cylinder. - Google Patents
Processes for assigning ignition signals to a reference cylinder.Info
- Publication number
- EP0455649A1 EP0455649A1 EP19900901550 EP90901550A EP0455649A1 EP 0455649 A1 EP0455649 A1 EP 0455649A1 EP 19900901550 EP19900901550 EP 19900901550 EP 90901550 A EP90901550 A EP 90901550A EP 0455649 A1 EP0455649 A1 EP 0455649A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- spark
- signals
- assignment
- internal combustion
- 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
Links
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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
-
- 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
-
- 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
- F02P2017/003—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines using an inductive sensor, e.g. trigger tongs
-
- 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
- F02P2017/006—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines using a capacitive sensor
Definitions
- the invention is based on a method for assigning ignition signals to a reference cylinder in multi-spark ignition systems of spark-ignition internal combustion engines according to the preamble of claims 1 and 5.
- the ignition system test device In order to be able to carry out a precise test of the ignition system of internal combustion engines, the ignition system test device must be synchronized with a reference cylinder. In ignition systems with distributors, the ignition on the reference cylinder is detected with the aid of a trigger signal sensor, which is clamped via the ignition cable leading to the reference cylinder, and passed on to the ignition system tester for evaluation and synchronization.
- This method is unsuitable for multi-spark ignition systems because the mechanical distributor is not required.
- the number of double spark ignition coils corresponding to half the number of cylinders is used, which has two separate or preferably a high-voltage winding, which then generates two high-voltage signals with different polarity.
- the actual ignition spark is referred to as the main spark and the other ignition spark as the auxiliary spark.
- an ignition signal adapter for distributorless ignition systems of externally ignited internal combustion engines in which the signals detected by trigger pliers, which are connected to the two ignition lines connected to a double spark ignition coil, are fed to a synchronization stage, at whose output the pulse train the actual ignition pulses are output for either one or the other cylinder.
- the synchronization with the actual ignition pulses in the reference cylinder is carried out by pressing a button which switches the output signal from one pulse train to the other.
- the method according to the invention has the advantage that the assignment of ignition signals to a reference cylinder takes place independently.
- the main and auxiliary sparks generated in double spark ignition coils differ in a certain working range of the internal combustion engine in the amount of the ignition voltages. Since the compression as well as the existing mixture and the mixture dynamics in the work cycle and Exhaust cycle are different, the main spark generally requires a much higher ignition voltage than the support spark.
- the assignment of ignition signals to a reference cylinder is determined from a comparison of the level of the high-voltage signals occurring at the reference cylinder with a reference level derived from the high-voltage signals.
- the reference level is determined from the signals with a lower level in comparison to the levels of the respectively preceding signals.
- Both the ignition voltage occurring at the reference cylinder, which is picked up, for example, by a capacitive transmitter, and the spark current that can be detected by an inductive transmitter, which can be measured after ignition, are suitable for evaluating the signal level.
- the assignment of ignition signals to a reference cylinder is determined from the time offset between the start of the spark at the reference cylinder and the start of spark at the other cylinder.
- the different ignition voltage requirement for main and auxiliary sparks in a specific operating range of the internal combustion engine is used for assignment.
- the start of the voltage rise in the ignition voltages of main and auxiliary sparks is triggered, for example, by interrupting the current flow in the primary circuit of the ignition coil. Since this voltage increase cannot take place infinitely quickly, the lower ignition voltage of the support spark is reached before the higher ignition voltage of the main spark.
- the start of the ignition spark on one of the two cylinders specifies a time signal triggers duration and that the reference cylinder is determined from the presence or absence of the ignition signal on the other cylinder within the time interval.
- the advantage of the second exemplary embodiment is in particular that the absolute values of the signals, for example the amplitudes, are not required.
- an inductive transmitter for detecting the spark current after the start of ignition and a capacitive transmitter for detecting the voltage at the start of ignition are equally suitable.
- a particularly advantageous development of the method according to the invention according to the two exemplary embodiments is possible in that the assignment of ignition signals to a reference cylinder is carried out in a predetermined operating range of the internal combustion engine and that this assignment is maintained when the range is left. At certain engine speeds or, for example, in overrun mode, the levels of the high-voltage signals can temporarily be of the same size.
- the assignment is advantageously carried out in an operating range, for example in engine idling, in which the signals differ significantly. Depending on the detected speed signal or if overrun is present, the assignment is to be held until the determined suitable operating range for synchronization is reached again. Further advantageous developments and improvements of the method according to the invention result from further subclaims in connection with the following description.
- FIG. 1 shows a block diagram of a multi-spark ignition system and FIG. 2 shows five signal curves as a function of the time that occur in the circuit shown in FIG. 1.
- FIG. 1 shows an ignition system for spark-ignited internal combustion engines, which contains two double-spark ignition coils 10, 11. Instead of the double spark ignition coils 10, 11, several ignition coils, each with a high-voltage winding, can be used, which simultaneously generate ignition pulses.
- the primary sides 12, 13 of the ignition coils 10, 11 are connected to an ignition control device 14, which has an electrically controllable switch 15, 16 for each ignition coil 10, 11, which are entered in FIG. 1 as transistor symbols.
- the ignition control device 14 receives control signals via input lines 17, 18.
- the two secondary connections 19, 20 of the ignition coil 10 and the secondary connections 21, 22 of the ignition coil 11 each lead to spark plugs 23, 24, 25, 26, which are each connected to ground 27.
- two or more secondary windings can also be provided on a coil 10, 11.
- the secondary connection 19 is connected both to a first frequency divider 28 and to a first synchronization stage 29.
- the first synchronization stage 29 outputs a signal to the first frequency divider 28 via a first control line 30.
- a signal can be tapped which indicates every second high-voltage pulse occurring at the secondary connection 19.
- the secondary connection 22 of the double spark ignition coil 11 is connected both to a second frequency divider 32 and to a timer 33 which is part of a second synchronization stage 34.
- the secondary connection 21 is fed directly to the second synchronizing stage 34.
- the second synchronization stage 34 outputs signals to the second frequency divider 32 via a second control line 35.
- a signal can be tapped at the output 36 of the second frequency divider 32, which indicates the occurrence of every second high-voltage pulse at the secondary connection 22.
- the two first signal curves 41, 42 shown in FIG. 2 reproduce measurable high-voltage signals as a function of the time T at the spark plugs 23-26.
- the signal curve 41 shows the high voltage signal when a main spark is ignited and the signal curve 42 shows the high voltage signal when an auxiliary spark is ignited.
- the switch 15 opens at a time T1.
- the abrupt change in current on the primary side 12, for example the double-spark ignition coil 10, results in steep voltage increases 43, 44 on the secondary side of the ignition coil 10.
- the differently high ignition voltage requirement U ZH of the main spark compared to that of the supporting spark U ZS is used to assign the ignition signals 41, 42 to a reference cylinder. This method is described with reference to the arrangement 28, 29 connected to the secondary connection 19 of the double spark ignition coil 10.
- the spark plug 23 is intended to ignite the gas-fuel mixture introduced into a reference cylinder.
- the signal occurring at the secondary connection 19 of the ignition coil 10 is fed to the first frequency divider 28.
- a galvanic connection to the ignition line is possible.
- Either a capacitive or inductive signal transmitter is preferably used.
- the capacitive encoder is clamped over the ignition cable and, together with the cable insulation, which acts as a dielectric, forms a capacitor with a small capacitance, via which alternating voltages can be passed on.
- the inductive sensor detects the current flowing in the ignition cable, which begins at the time of the spark breakdown T2, T3 and which continues during the spark burning period. Only the start of the current at ignition times T2, T3 is of interest here.
- the capacitive transmitter reproduces the relative course of the high-voltage signals 41, 42, the amplitude ratios U ZH / U BH being retained. With the capacitive encoder, the signal amplitudes can be evaluated directly.
- the current detected by the inductive transmitter also has different amplitudes for main and auxiliary sparks.
- the higher ignition voltage U ZH results in a larger breakdown current than the lower one
- Encoders detected signals can be used as a measure of the signal profiles 41, 42 from the times T2, T3.
- the first frequency divider 28 outputs a pulse train at the output 31, the frequency of which is half the frequency of the pulse train of the input signals. This frequency division by two is required because there are 23 main and support sparks on the spark plug, but only the main sparks that occur when the reference cylinder is fired should be evaluated.
- An sc Francisco input circuit of the first frequency divider 28 is designed such that each input pulse, regardless of the signal amplitude, is counted.
- the first synchronization stage 29 enables the pulses occurring at the output 31 of the first frequency divider 28 to be synchronized with the main sparks occurring at the spark plug 23.
- the synchronization stage 29 evaluates the amplitude of what occurs at the spark plug 23. Signal off and controls the first frequency divider 28 via line 30 accordingly. Exceeding or falling below the amplitude with respect to a reference level is used, for example, to set a counter contained in the first frequency divider 28 to an initial state.
- the reference signal is determined from the signals with a low level in comparison to the levels of the preceding signals. In this way, an adaptive adaptation of the reference level to the actual amplitude conditions is possible.
- the time offset between the start of ignition T2 of the support spark and the start of ignition T3 of the main spark is used to assign ignition signals to a reference cylinder. This method is described with reference to the arrangement connected to the secondary connections 21, 22 of the double spark ignition coil 11.
- the voltage curve 41 shown in FIG. 2 occurs at the spark plug
- the signal which can be tapped at the spark plug 26 is fed to the second frequency divider 32, which emits a pulse sequence at its output 36, the frequency of which is halved compared to the frequency of the input pulse sequence.
- the second synchronizing stage 34 assigns the pulse sequence that can be tapped at the output 36 to the main sparks of the spark plug 25.
- Each pulse which can be tapped off from the spark plug 26 and which is supplied to the timer 33 starts a time interval T6 which can be predetermined by the timer 33 and which begins with the occurrence of the pulse at the time T2 and ends at the time T5.
- the second synchronizing stage 34 emits a synchronizing signal via the line 35 if the ignition spark begins at the other spark plug 25 within the time interval T6.
- An occurrence of the start of the spark as here in the example, means that the main spark has occurred at the spark plug 25. If no ignition spark start is registered, the main spark has occurred on the spark plug 26.
- the time interval T6 is expediently chosen to be shorter than the time intervals corresponding to the highest possible speed of the internal combustion engine between two ignition processes.
- the assignment is made in a predeterminable operating range of the internal combustion engine and that this assignment is maintained when leaving the range.
- the high-voltage curves 41, 42 shown for the main and auxiliary sparks apply to a wide operating range of the internal combustion engine.
- the amplitudes of the two signals 41, 42 can temporarily be the same size or even behave in reverse.
- the first synchronization stage 29 or the second synchronization stage 32 can be locked. The locking takes place, for example, as a function of a speed signal or as a function of, for example, a fuel flow signal. When evaluating the speed signal, locking during a speed change is also particularly advantageous.
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)
Abstract
Des procédés servent à attribuer de signaux d'allumage à un cylindre de référence dans des installations d'allumage à étincelles multiples de moteurs à combustion interne à allumage commandé. Selon un premier procédé, on utilise pour attribuer les signaux d'allumage des niveaux différents de signaux pour les étincelles principales et pour les étincelles auxiliaires, et selon un deuxième procédé, on utilise le décalage temporel entre le commencement des étincelles principales et le commencement des étincelles auxiliaires.Methods are used to assign ignition signals to a reference cylinder in multiple spark ignition installations of positive ignition internal combustion engines. According to a first method, different signal levels are used for the ignition signals for the main sparks and for the auxiliary sparks, and according to a second method, the time shift between the start of the main sparks and the start of the sparks is used. auxiliary sparks.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3902254 | 1989-01-26 | ||
DE3902254A DE3902254A1 (en) | 1989-01-26 | 1989-01-26 | METHOD FOR ASSIGNING IGNITION SIGNALS TO A REFERENCE CYLINDER |
PCT/DE1990/000010 WO1990008894A1 (en) | 1989-01-26 | 1990-01-11 | Processes for assigning ignition signals to a reference cylinder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0455649A1 true EP0455649A1 (en) | 1991-11-13 |
EP0455649B1 EP0455649B1 (en) | 1994-08-31 |
Family
ID=6372827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90901550A Expired - Lifetime EP0455649B1 (en) | 1989-01-26 | 1990-01-11 | Processes for assigning ignition signals to a reference cylinder |
Country Status (5)
Country | Link |
---|---|
US (1) | US5107817A (en) |
EP (1) | EP0455649B1 (en) |
DE (2) | DE3902254A1 (en) |
ES (1) | ES2061012T3 (en) |
WO (1) | WO1990008894A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5370099A (en) * | 1990-08-24 | 1994-12-06 | Robert Bosch Gmbh | Ignition system for internal combustion engines |
US5410253A (en) * | 1993-04-08 | 1995-04-25 | Delco Electronics Corporation | Method of indicating combustion in an internal combustion engine |
DE4436574A1 (en) | 1994-10-13 | 1996-04-18 | Bosch Gmbh Robert | Device for detecting ignition signals |
DE4437480C1 (en) * | 1994-10-20 | 1996-03-21 | Bosch Gmbh Robert | Method for monitoring the function of an internal combustion engine for detecting misfires |
SE508753C2 (en) * | 1995-10-24 | 1998-11-02 | Saab Automobile | Method and apparatus for identifying which combustion chamber of an internal combustion engine is at compression rate and method of starting an internal combustion engine |
JPH09280152A (en) * | 1996-04-12 | 1997-10-28 | Honda Motor Co Ltd | Cylinder discriminating device for internal combustion engine |
US5638799A (en) * | 1996-05-22 | 1997-06-17 | General Motors Corporation | Double strike ignition control |
DE102009000444A1 (en) | 2009-01-28 | 2010-07-29 | Robert Bosch Gmbh | Apparatus and method for operating an internal combustion engine, computer program, computer program product |
US8286617B2 (en) * | 2010-12-23 | 2012-10-16 | Grady John K | Dual coil ignition |
US9117585B2 (en) * | 2013-07-16 | 2015-08-25 | Delphi Technologies, Inc. | Ignition coil |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6055711B2 (en) * | 1981-01-08 | 1985-12-06 | 日産自動車株式会社 | plasma igniter |
US4483293A (en) * | 1982-04-06 | 1984-11-20 | Mitsubishi Denki Kabushiki Kaisha | Ignition time control device |
US4478201A (en) * | 1982-12-20 | 1984-10-23 | Ford Motor Company | Enhanced spark energy distributorless ignition system (A) |
DE3325308A1 (en) * | 1983-07-13 | 1985-01-24 | Siemens AG, 1000 Berlin und 8000 München | Ignition signal adaptor for ignition systems, without a distributor, of internal combustion engines with externally supplied ignition |
US4711227A (en) * | 1986-08-15 | 1987-12-08 | Motorola, Inc. | Apparatus and method for electronic ignition control |
IT1196843B (en) * | 1986-12-15 | 1988-11-25 | Fiat Auto Spa | ELECTRIC DETECTOR DEVICE SUITABLE FOR ALLOWING THE IDENTIFICATION OF THE WORKING PHASES OF A CYLINDER OF AN INTERNAL COMBUSTION ENGINE WITH COMMAND IGNITION |
IT1208855B (en) * | 1987-03-02 | 1989-07-10 | Marelli Autronica | VARIABLE SPARK ENERGY IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES PARTICULARLY FOR MOTOR VEHICLES |
KR920000053B1 (en) * | 1987-05-26 | 1992-01-06 | 미쓰비시전기 주식회사 | Engine control device |
JP2577074B2 (en) * | 1988-03-18 | 1997-01-29 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Cylinder recognition device for ignition system without distributor |
US4913123A (en) * | 1989-03-23 | 1990-04-03 | Ford Motor Company | Ignition timing system with feedback correction |
JP2760141B2 (en) * | 1989-09-19 | 1998-05-28 | 株式会社デンソー | Contactless ignition device for internal combustion engine |
-
1989
- 1989-01-26 DE DE3902254A patent/DE3902254A1/en not_active Ceased
-
1990
- 1990-01-11 WO PCT/DE1990/000010 patent/WO1990008894A1/en active IP Right Grant
- 1990-01-11 ES ES90901550T patent/ES2061012T3/en not_active Expired - Lifetime
- 1990-01-11 US US07/730,774 patent/US5107817A/en not_active Expired - Fee Related
- 1990-01-11 EP EP90901550A patent/EP0455649B1/en not_active Expired - Lifetime
- 1990-01-11 DE DE59006981T patent/DE59006981D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9008894A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59006981D1 (en) | 1994-10-06 |
ES2061012T3 (en) | 1994-12-01 |
DE3902254A1 (en) | 1990-08-02 |
WO1990008894A1 (en) | 1990-08-09 |
EP0455649B1 (en) | 1994-08-31 |
US5107817A (en) | 1992-04-28 |
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