EP0889235B1 - Dispositif de détermination de la phase de fonctionnement d'un moteur à combustion interne - Google Patents
Dispositif de détermination de la phase de fonctionnement d'un moteur à combustion interne Download PDFInfo
- Publication number
- EP0889235B1 EP0889235B1 EP19980401684 EP98401684A EP0889235B1 EP 0889235 B1 EP0889235 B1 EP 0889235B1 EP 19980401684 EP19980401684 EP 19980401684 EP 98401684 A EP98401684 A EP 98401684A EP 0889235 B1 EP0889235 B1 EP 0889235B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sign
- signal
- ignition
- phase
- coil
- 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
- 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
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/077—Circuits therefor, e.g. pulse generators
Definitions
- the present invention relates to a determination device of the operating phase of a combustion engine internal.
- the invention relates to a such a device which makes it possible to determine the operating phase an internal combustion engine with simultaneous ignition per pair of cylinders, in particular for a motor vehicle.
- the secondary winding of this ignition coil is for example a mid-point winding and the winding primary of it receives an ignition control signal of the power stage.
- the object of the invention is to propose a device of this type which has a simple and reliable structure.
- the invention relates to a device for determining the operating phase of a motor internal combustion with simultaneous ignition by pair of cylinders in particular for a motor vehicle, in which candles associated with the cylinders of each pair are connected at the ends of a secondary winding of a coil ignition whose primary winding receives a signal ignition control of control means controlled by a engine operation control computer, characterized in that it includes means for determining the arithmetic mean value of the two output voltages secondary winding to deliver a binary signal comprising representative slots of the sign of this mean, means for measuring the time elapsing between the instant of control of the coil by the control means and the instant of change of state of the binary signal for at least two successive orders of the coil and means of analysis of these times to determine the phase of engine operation.
- candles associated with cylinders of each pair are connected at the ends a secondary winding of an ignition coil, the primary winding is connected to piloted control means by an engine operation control computer.
- the ignition coil is designated by the general reference 1, while the winding primary of it is designated by the general reference 2.
- One of the end terminals of this primary winding 2 is connected for example to the positive terminal + bat of the battery vehicle power supply, while the other terminal end thereof is connected to control means of power designated by the general reference 3 on this figure, including for example a power transistor controlled by a computer 4 controlling the operation of the engine.
- the secondary winding of the ignition coil is meanwhile designated by the general reference 5 and each of its ends is connected to a terminal of a candle, designated by general references 6 and 7, corresponding respectively to cylinder n ° 1 and to cylinder n ° 4 of the engine, associated in pair.
- the computer 4 for controlling the operation of the engine allows by piloting means of power control 3 to apply a control signal ignition Vc to the spark plugs via the coil ignition 1.
- FIGS. 2 and 3 This operation is illustrated in FIGS. 2 and 3, in which the references V HT 1 and V HT 4 represent the voltages at the terminals of the spark plugs 6 and 7 respectively of the corresponding pair of cylinders 1 and 4 and V PM represents the value arithmetic mean of these two tensions.
- V HT 1 and V HT 4 are therefore of opposite signs and their arithmetic mean V PM is of the sign of the highest voltage, in absolute value.
- the secondary voltages V HT 1 and V HT4 of the secondary winding of the ignition coil increase simultaneously and in opposite directions.
- the voltage V PM remains close to O volt until the spark plug of cylinder No. 4 goes into a conductive state.
- the voltage V PM continues to grow as rises the voltage V HT 1 until time t ionization ion of the corresponding spark plug.
- cylinder No. 4 is in the compression phase and the voltage V PM takes the sign of the voltage V HT 4 between t o and t ion .
- V PM therefore provides information on the cylinder in the compression phase.
- This location can be done by acquiring the time elapsing between ignition control and change state of a signal Vs from the ignition coil, this signal being established for example from the value arithmetic mean of the two secondary winding voltages of it, to deliver a representative binary signal of the sign of this average.
- This binary signal Vs then comprises representative slots for example of a negative sign of this value average.
- the signal Vs after digital processing, indicates what is the cylinder in compression phase in the pair of cylinders connected to the controlled coil.
- At least two successive detections can be planned to confirm the decision.
- the signal used to make this determination phase is a logic signal from the ignition coil which can also be called phase signal.
- This signal is produced from the voltages of the ignition coil outputs common to cylinders 1 and 4 for example, that is to say from the voltages V HT 1 and V HT 4, by means of conventional type for determining the arithmetic mean value of these two voltages, these means being designated by the general reference 8 in FIG. 1.
- the output of these determination means 8 is connected for example to formatting means designated by the general reference 9 integrated for example in the computer 4 for checking the operation of the engine.
- phase information is contained in the measurement of the time elapsing between the ignition command instant of cylinders n ° 1 and n ° 4 and the moment of change phase signal status.
- the output of the shaping means 9 can be connected to a counter designated by the general reference 10, receiving a clock signal CLK and itself associated with means of storage designated by the general reference 11 and to a central information processing unit designated by the general reference 12, of the computer 4, itself connected to the power control means 3 described above to control the operation of the coil ignition and to counter 10 for resetting.
- This measure must not be disturbed by the occupation of the central unit 12 to be used for a priority task.
- the counter 10 is reset by the ignition control signal and the phase signal directly triggers the memorization of the state of the counter.
- the purpose of signal processing is therefore to correspond to an ignition command of the corresponding coil, the number of the cylinder which is in the compression phase.
- the information used is as indicated previously, the time elapsing between the order instant of ignition and the instant of change of signal state phase Vs.
- This detection must be error free and the number of ignitions required must be minimal in order not to not extend the vehicle engine start time.
- the acquired time tn-1 is compared to a value calibrated ts, in 18.
- the acquisition is then incremented during step 21.
- step 17 When acquiring the time corresponding to the second ignition command, as detected during step 17, the signed difference in time acquired during two successive acquisitions tn- (tn-1) is multiplied by the SGN sign previously memorized in 19 or 20, like this is illustrated in step 22.
- ⁇ tn is then compared to a calibrated threshold, for example positive ts + which represents the magnitude of the transition required to consider the valid test, as illustrated by step 23.
- the product with the memorized SGN sign validates that the transition has occurred in the expected direction.
- ⁇ tn is greater than ts +, the phase is determined and the next top dead center of the engine will be known as function of ignition order and pair of cylinders on which the measurement is made. On the other hand if ⁇ tn is lower than ts +, the phase is indeterminate and it is repeated at from step 23, the strategy, using the last value of tn, for the next test.
- steps 24, 25 and 26 you can determine what is the engine operating phase by determining from the next top dead center of a cylinder, to from the memorized sign SGN.
- Figures 7 and 8 illustrate proper operation of the system which determines that the next point dead top will be the one corresponding to cylinder # 2 on the Figure 7 and cylinder # 3 in Figure 8.
- FIGS 9 and 10 illustrate the case system malfunction due to improper calibration.
- Figure 11 illustrates the case of a reiteration of treatment.
- the determination device has an extremely simple structure and reliable which allows precise determination of the operating phase of a motor vehicle engine.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Description
- la Fig.1 représente un schéma synoptique d'une partie d'un dispositif de détermination de phase selon l'invention;
- les Figs.2 et 3 illustrent le fonctionnement d'un système d'allumage simultané par paire de cylindres d'un moteur de véhicule automobile;
- la Fig.4 représente un schéma synoptique d'une autre partie d'un dispositif de détermination de phase selon l'invention;
- la Fig.5 représente des chronogrammes illustrant des signaux présents dans cette partie du dispositif;
- la Fig.6 représente un organigramme illustrant le fonctionnement d'un tel dispositif de détermination de phase; et
- les Figs.7 à 11 illustrent différents exemples de détermination de phase grâce à un dispositif selon l'invention.
Claims (4)
- Dispositif de détermination de la phase de fonctionnement d'un moteur à combustion interne à allumage simultané par paire de cylindres, notamment pour véhicule automobile, dans lequel des bougies (7, 6) associées aux cylindres de chaque paire sont raccordées aux extrémités d'un bobinage secondaire (5) d'une bobine d'allumage (1) dont le bobinage primaire (2) reçoit un signal (Vc) de commande d'allumage de moyens de commande (3) pilotés par un calculateur (4) de contrôle de fonctionnement du moteur, caractérisé en ce qu'il comporte des moyens (8) de détermination de la valeur moyenne arithmétique des deux tensions de sortie du bobinage secondaire (5) pour délivrer un signal binaire (Vs) comportant des créneaux représentatifs du signe de cette moyenne, des moyens (9,10,11,12) de mesure du temps s'écoulant entre l'instant de commande de la bobine par les moyens de commande et l'instant de changement d'état du signal binaire (Vs) pour au moins deux commandes successives de la bobine et des moyens (12) d'analyse de ces temps pour déterminer la phase de fonctionnement du moteur.
- Dispositif selon la revendication 1, caractérisé en ce que les moyens d'analyse (12) des temps comprennent des moyens pour contrôler que ceux-ci sont compris entre des valeurs de seuil minimale et maximale (tmin et tmax), des moyens de comparaison du temps correspondant à la première commande avec une valeur de seuil prédéterminée (ts) pour mémoriser un signe (SGN) en fonction du résultat de cette comparaison, des moyens de calcul d'une valeur différentielle (Δtn) par soustraction des deux temps (tn-1, tn), acquis lors des commandes successives de la bobine, des moyens de multiplication de la valeur différentielle (Δtn) par le signe mémorisé (SGN), des moyens de comparaison du résultat de cette multiplication à une valeur de seuil calibrée (ts+), pour valider la détermination de la phase de fonctionnement du moteur, en fonction du signe mémorisé (SGN) et de la valeur différentielle (Δtn).
- Dispositif selon la revendication 2, caractérisé en ce que le signe (SGN) est établi à partir de la relation suivante :
si t < ts, alors signe = +
si t ≥ ts, alors signe = -
t représentant le temps correspondant, et
ts représentant la valeur de seuil prédéterminée,
et en ce que la valeur de seuil calibrée est une valeur positive (ts+). - Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de mesure du temps comprennent un compteur (10) associé à des moyens de mémorisation (11) et recevant en entrée un signal d'horloge (CLK) et le signal de phase (Vs) et sur une borne de remise à zéro, le signal de commande (Vc) à partir d'une unité centrale (12) du calculateur (4).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9708529A FR2765624B1 (fr) | 1997-07-04 | 1997-07-04 | Dispositif de determination de la phase de fonctionnement d'un moteur a combustion interne |
FR9708529 | 1997-07-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0889235A1 EP0889235A1 (fr) | 1999-01-07 |
EP0889235B1 true EP0889235B1 (fr) | 2002-12-18 |
Family
ID=9508894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980401684 Expired - Lifetime EP0889235B1 (fr) | 1997-07-04 | 1998-07-03 | Dispositif de détermination de la phase de fonctionnement d'un moteur à combustion interne |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0889235B1 (fr) |
DE (1) | DE69810198T2 (fr) |
FR (1) | FR2765624B1 (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4543936A (en) * | 1984-09-17 | 1985-10-01 | General Motors Corporation | Sequential fuel injection sync pulse generator |
US4795979A (en) * | 1986-12-15 | 1989-01-03 | Sun Electric Corporation | Method and apparatus for determining cylinder #1 power firing event in wasted spark ignition systems |
US4847563A (en) * | 1988-07-12 | 1989-07-11 | Snap-On Tools Corporation | Distributorless ignition interface |
FR2714116B1 (fr) * | 1993-12-17 | 1996-01-26 | Renault | Procédé d'identification d'un cylindre de référence d'un moteur à combustion interne à allumage commande. |
-
1997
- 1997-07-04 FR FR9708529A patent/FR2765624B1/fr not_active Expired - Fee Related
-
1998
- 1998-07-03 EP EP19980401684 patent/EP0889235B1/fr not_active Expired - Lifetime
- 1998-07-03 DE DE1998610198 patent/DE69810198T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69810198T2 (de) | 2003-04-30 |
FR2765624B1 (fr) | 1999-09-17 |
DE69810198D1 (de) | 2003-01-30 |
FR2765624A1 (fr) | 1999-01-08 |
EP0889235A1 (fr) | 1999-01-07 |
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