EP0756083B1 - Control circuit for glow plugs of diesel engine - Google Patents
Control circuit for glow plugs of diesel engine Download PDFInfo
- Publication number
- EP0756083B1 EP0756083B1 EP19960401483 EP96401483A EP0756083B1 EP 0756083 B1 EP0756083 B1 EP 0756083B1 EP 19960401483 EP19960401483 EP 19960401483 EP 96401483 A EP96401483 A EP 96401483A EP 0756083 B1 EP0756083 B1 EP 0756083B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- computer
- circuit
- terminal
- mos
- mos transistor
- 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
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Definitions
- a diesel engine requires, before starting, that it be applied a certain preheating.
- This preheating is carried out by specific candles which are controlled by a circuit powered by the vehicle battery.
- the circuit of control has a timer function, to determine the duration application of the preheating current, and a function of power, to ensure the switching of the intense current passing through the candles, which have a low resistance value.
- the control circuit uses the management computer (microprocessor) of the motor, which is connected, by a first removable power connector, to the spark plugs and, via a second removable connector for low currents, vehicle wiring harness.
- management computer microprocessor
- a relay static has a power MOS transistor, which has a drop of very low voltage and thus transfers all the battery voltage to a group of candles.
- the power connector has three terminals, namely a power supply terminal, connected directly to the positive terminal of the battery, and two output terminals to supply two groups of spark plugs connected to the mass.
- the microprocessor is supplied with battery voltage by the second connector, for low currents. Therefore, when the latter is disconnected, the microprocessor is normally de-energized. However, this is not case, because the MOS switch allows leakage currents, coming from the positive battery terminal.
- the invention relates to a spark plug control circuit preheating of a diesel engine, comprising a computer and at least one electronic relay controlled by the computer, characterized in that it is provided means for connecting the computer to a reference voltage (mass) through the candles.
- the control circuit delimited by an axis line in the figure, is carried by a printed circuit board and is housed, in a case not shown, at near a car's diesel engine. It includes a calculator 1 controlling an electronic relay 2 made up here of a MOS transistor of power.
- a removable connector 3 connects the computer 1 as input to a blade 33 of a relay controlled by the car ignition key and a speed sensor engine 32.
- the connector 3 connects the computer 1 to earth.
- a removable connector 4, of power connects respectively, by terminals current input and output 41 and 42, drain 21 and source 23 of MOS 2 to the terminal supplying the voltage + Vb of the battery 30, and to an electrode a glow plug 31 for the diesel engine, a plug connected in addition to the mass of the battery 30.
- the computer 1 is thus connected to the spark plug 31 at through MOS 2 and connector 4. For the sake of clarity, it is not shown as a candle and a single relay 2 associated.
- the computer 1 comprises a microprocessor 11 controlling the grid 22 of the MOS 2 through a control circuit 12, in order to apply to the spark plug 31 a fixed-term heating in response to actuation of the ignition or starting the engine.
- a link circuit 5 shown surrounded by a dotted frame, connects the grid 22 from MOS 2 to terminal 42 supplying the spark plug 31. More specifically, the drain 51 of a MOS transistor 50 is connected to the gate 22, normally controlled by the output of circuit 12, while source 53 of MOS 50 is connected to terminal output 42 through a series diode 54 setting a control threshold.
- a divider bridge made up of two resistors 55-56 connects terminal 41, supplying MOS 2 with + Vb, to a ground link 61 of computer 1, internal to the card, polarized, as shown, by the earth terminal of the battery 30 through connector 3.
- the midpoint of bridge 55-56 is connected to the gate 52 of the transistor 50 as well as at one end of a capacitor 57 of integration, connected, by its opposite end, to the source 53, through the diode 54, and to the output terminal 42.
- the concept of the invention is to use the potential at the output 42 supplying the spark plug 31 as a low potential reference, in place of the ground (61) when not supplied to the card, in order to block the MOS 2.
- connection circuit 5 to the computer 1 when the connector 3 is disconnected and therefore that the ground link 61 is floating.
- the voltage + Vb of the power supply terminal 41 causes leakage currents to pass through the drain 21 to the grid 22 which, not being biased by the control circuit 12, charges and tends to unlock the MOS 2.
- the link circuit 5 replaces the circuit 12 to flow to ground the parasitic charges accumulated on the grid 22, this flow taking place by the drain 51 and the source 53 of the MOS 50, the diode 54, the terminal 42 and the spark plug 31.
- the latter of low resistance and traversed by a weak current, brings back thus, on terminal 42 a pseudo-mass.
- the link of circuit 5 with terminal 42 of current output has a double function. On the one hand, as has just been explained, it serves to sell the parasitic charges. On the other hand, it can be considered as an entry of information, since it provides a voltage reference which is compared to the voltage of the internal ground link 61. As long as the latter is isolated of the mass of the battery 30, via the open connector 3, the divider bridge 55-56 has no mass reference so its midpoint has a high potential which leads to the conduction of the MOS 50. It applies a low resistance between the grid 22 and the source 23 which brings back to ground of the spark plug 31 the potential of the grid 22, by clearly blocking the MOS 2.
- the capacitor 57 of the circuit integrator RC: 55-56 / 57 is too high to obtain a determined time constant used to filter the switching during Connections / disconnection of Connector 3 or during activation / deactivation of commands managed by the computer 1.
- connection circuit 5 includes a voltage comparator with two inputs (61 and 42) and two outputs (51, 42) to block the MOS 2 by applying a blocking potential between two of these electrodes (22, 23).
- circuit 5 could for example be used to reference the connection of ground (61) of circuit 12 to pseudo-ground (42), i.e. circuit 5 does not would not replace circuit 12 but that it would ensure correct operation of it, in the rest state, even in the absence of the real mass (61).
- the action of circuit 5, blocking of MOS 2 would thus take place through circuit 12.
- a separate control of circuit 5 on a specific electrode for blocking the electronic relay is also possible.
- the pseudo-mass reference 42 ensures the operation of circuit 5, but that the blocking action of the latter on the electronic relay consists in ensuring maintaining a blocking potential on an electrode thereof, without this potential must necessarily be that of the pseudo-mass.
- loopback between the two terminals of the battery, produced by the circuit 5, is independent of any notion of grounding one or the other terminal of this one.
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)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
Un moteur diesel nécessite, avant de démarrer, qu'on lui applique un certain préchauffage.A diesel engine requires, before starting, that it be applied a certain preheating.
Ce préchauffage est effectué par des bougies spécifiques qui sont commandées par un circuit alimenté par la batterie du véhicule. Le circuit de commande a une fonction de temporisateur, pour déterminer la durée d'application du courant de préchauffage, et une fonction de commutateur de puissance, pour assurer la commutation du courant intense traversant les bougies, qui présentent une résistance de faible valeur.This preheating is carried out by specific candles which are controlled by a circuit powered by the vehicle battery. The circuit of control has a timer function, to determine the duration application of the preheating current, and a function of power, to ensure the switching of the intense current passing through the candles, which have a low resistance value.
Le circuit de commande fait appel au calculateur (microprocesseur) de gestion du moteur, qui est relié, par un premier connecteur amovible de puissance, aux bougies et, par un second connecteur amovible pour courants faibles, au faisceau de câblage du véhicule.The control circuit uses the management computer (microprocessor) of the motor, which is connected, by a first removable power connector, to the spark plugs and, via a second removable connector for low currents, vehicle wiring harness.
Pour réduire la taille du circuit de commande, la tendance actuelle consiste à utiliser, comme commutateurs de puissance, des relais statiques, ou électroniques, à la place de relais électromécaniques. En pratique, un relais statique comporte un transistor MOS de puissance, qui présente une chute de tension très faible et transfère ainsi toute la tension batterie sur un groupe de bougies.To reduce the size of the control circuit, the current trend is to use, as power switches, solid state relays, or electronic, instead of electromechanical relays. In practice, a relay static has a power MOS transistor, which has a drop of very low voltage and thus transfers all the battery voltage to a group of candles.
Il est alors apparu le problème suivant, lors d'opérations d'entretien chez les garagistes.The following problem then appeared during maintenance operations on the garage owners.
Comme l'ordre relatif de connexion des deux connecteurs d'un microprocesseur n'est pas mécaniquement imposé, il peut se produire que les bougies soient connectées au microprocesseur alors que celui-ci n'est pas en état de fonctionner correctement.As the relative order of connection of the two connectors of a microprocessor is not mechanically imposed, it may happen that plugs are connected to the microprocessor while it is not in state to function properly.
Plus précisément, le connecteur de puissance présente trois bornes, à savoir une borne d'alimentation, reliée directement à la borne positive de la batterie, et deux bornes de sortie pour alimenter deux groupes de bougies reliées à la masse. More specifically, the power connector has three terminals, namely a power supply terminal, connected directly to the positive terminal of the battery, and two output terminals to supply two groups of spark plugs connected to the mass.
Le microprocesseur est alimenté en tension batterie par le deuxième connecteur, pour courants faibles. De ce fait, quand ce dernier est déconnecté, le microprocesseur est en principe hors tension. Cela n'est cependant pas le cas, car l'interrupteur MOS laisse passer des courants de fuite, provenant de la borne positive de la batterie.The microprocessor is supplied with battery voltage by the second connector, for low currents. Therefore, when the latter is disconnected, the microprocessor is normally de-energized. However, this is not case, because the MOS switch allows leakage currents, coming from the positive battery terminal.
Comme la masse, normalement fournie à travers le deuxième connecteur, est alors flottante, l'effet des courants parasites ne-peut pas être neutralisé, si bien que ceux-ci provoquent l'accumulation de charges sur l'électrode de commande de l'interrupteur MOS et entraínent sa conduction partielle. Cependant, cette commande parasite n'est que partielle et le transistor MOS n'est alors pas totalement conducteur et offre une résistance de conduction. Il est de ce fait incapable de transférer aux bougies qu'il alimente la totalité de la tension batterie et, de ce fait, absorbe une partie de la puissance électrique qui devrait être appliquée aux bougies. N'étant pas dimensionné à cet effet, il est détruit.As the mass, normally supplied through the second connector, is while floating, the effect of stray currents cannot be neutralized, so that these cause the accumulation of charges on the electrode of control of the MOS switch and cause its partial conduction. However, this parasitic command is only partial and the MOS transistor is therefore not fully conductive and offers conduction resistance. he is therefore unable to transfer to the candles that it powers the entire battery voltage and, therefore, absorbs part of the electrical power which should be applied to candles. Not being sized for this purpose, it is destroy.
Pour résoudre ce problème, il est exclu d'empêcher le flottement de la masse du circuit de commande en ajoutant une borne de masse au connecteur de puissance, si l'on veut conserver une compatibilité avec le parc en service. Par ailleurs, étant donné les intensités commutées, il est tout autant exclu de contrôler l'alimentation du connecteur de puissance par la clé de contact.To solve this problem, it is excluded to prevent the floating of the mass of the control circuit by adding a ground terminal to the connector of power, if we want to maintain compatibility with the fleet in service. Through elsewhere, given the switched intensities, it is just as excluded from check the power connector power supply with the ignition key.
De même, imposer aux garagistes un ordre d'intervention sur les deux connecteurs paraít illusoire.Likewise, impose on garage owners an intervention order on both connectors seem illusory.
La demanderesse a alors eu l'idée d'utiliser le défaut présenté par le branchement incorrect pour résoudre le problème posé, c'est-à-dire d'utiliser la fausse référence de masse, présentée par les sorties allant aux bougies, comme une vraie référence de masse, de secours, pour un circuit inhibant le MOS interrupteur tant que le circuit de commande n'est pas relié directement à la masse de la batterie par le connecteur pour courants faibles.The plaintiff then had the idea of using the defect presented by the incorrect connection to solve the problem, that is to use the false reference of mass, presented by the outputs going to the candles, as a real reference for mass, backup, for a circuit inhibiting the MOS switch as long as the control circuit is not directly connected to the mass of the battery via the connector for low currents.
A cet effet, l'invention concerne un circuit de commande de bougies de préchauffage d'un moteur diesel, comportant un calculateur et au moins un relais électronique contrôlé par le calculateur, caractérisé par le fait qu'il est prévu des moyens pour relier le calculateur à une tension de référence (masse) à travers les bougies.To this end, the invention relates to a spark plug control circuit preheating of a diesel engine, comprising a computer and at least one electronic relay controlled by the computer, characterized in that it is provided means for connecting the computer to a reference voltage (mass) through the candles.
Ainsi, et paradoxalement, ce sont les bougies qui contrôlent le circuit de commande lorsque celui-ci a un branchement incorrect, et qui le bloquent en pareil cas, évitant ainsi toute destruction du relais de celui-ci.So, and paradoxically, it is the candles that control the circuit of command when it has an incorrect connection, and which block it in such a case, thus avoiding any destruction of the relay thereof.
L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation préférée du circuit de commande de l'invention, en référence à la figure unique du dessin annexé qui le représente.The invention will be better understood using the following description of a form preferred embodiment of the control circuit of the invention, with reference to the single figure of the attached drawing which represents it.
Le circuit de commande délimité par un trait d'axe sur la figure, est porté par une carte de circuit imprimé et est logé, dans un boítier non représenté, à proximité du moteur diesel d'une voiture. Il comporte un calculateur 1 contrôlant un relais électronique 2 constitué ici d'un transistor MOS de puissance.The control circuit delimited by an axis line in the figure, is carried by a printed circuit board and is housed, in a case not shown, at near a car's diesel engine. It includes a calculator 1 controlling an electronic relay 2 made up here of a MOS transistor of power.
Un connecteur amovible 3 relie en entrée le calculateur 1 à une lame 33 d'un
relais commandé par la clé de contact de la voiture et à un capteur de régime
moteur 32. Le connecteur 3 relie le calculateur 1 à la masse.A removable connector 3 connects the computer 1 as input to a blade 33 of a
relay controlled by the car ignition key and a
Un connecteur amovible 4, de puissance, relie respectivement, par des bornes
d'entrée et de sortie de courant 41 et 42, le drain 21 et la source 23 du MOS 2
à la borne fournissant la tension + Vb de la batterie 30, et à une électrode
d'une bougie 31 de préchauffage du moteur diesel, bougie reliée par ailleurs à
la masse de la batterie 30. Le calculateur 1 est ainsi relié à la bougie 31 à
travers le MOS 2 et le connecteur 4. Pour la clarté de l'exposé, il n'est
représenté qu'une bougie et un seul relais 2 associé.A
Le calculateur 1 comporte un microprocesseur 11 commandant la grille 22 du
MOS 2 à travers un circuit de commande 12, afin d'appliquer à la bougie 31 un
chauffage de durée déterminée en réponse à l'actionnement de la clef de
contact ou le démarrage du moteur. The computer 1 comprises a
Un circuit de liaison 5, représenté entouré d'un cadre en pointillés, relie la grille
22 du MOS 2 à la borne 42 alimentant la bougie 31. Plus précisément, le drain
51 d'un transistor MOS 50 est relié à la grille 22, normalement commandée par
la sortie du circuit 12, tandis que la source 53 du MOS 50 est reliée à la borne
de sortie 42 à travers une diode série 54 fixant un seuil de commande.A
Un pont diviseur constitué de deux résistances 55-56 relie la borne 41,
d'alimentation du MOS 2 en + Vb, à une liaison 61 de masse du calculateur 1,
interne à la carte, polarisée, comme indiqué, par la borne de masse de la
batterie 30 à travers le connecteur 3. Le point milieu du pont 55-56 est relié à
la grille 52 du transistor 50 ainsi qu'à une extrémité d'un condensateur 57
d'intégration, relié, par son extrémité opposée, à la source 53, à travers la
diode 54, et à la borne de sortie 42.A divider bridge made up of two resistors 55-56 connects
Le fonctionnement du circuit de commande va maintenant être expliqué.The operation of the control circuit will now be explained.
Le concept de l'invention est d'utiliser le potentiel au niveau de la sortie 42
alimentant la bougie 31 comme référence de potentiel bas, à la place de la
masse (61) lorsqu'elle n'est pas fournie à la carte, afin de bloquer le MOS 2.The concept of the invention is to use the potential at the
On peut ainsi substituer, pour commander le MOS 2 commutateur de
puissance, le circuit de liaison 5 au calculateur 1 lorsque le connecteur 3 est
déconnecté et donc que la liaison de masse 61 est flottante. En pareil cas, le
connecteur 4 étant en place, la tension +Vb de la borne d'alimentation 41
entraíne le passage de courants de fuite par le drain 21 jusqu'à la grille 22 qui,
n'étant pas polarisée par le circuit de commande 12, se charge et tend à
débloquer le MOS 2.We can thus substitute, to control the MOS 2 switch
power, the
Le circuit de liaison 5 se substitue au circuit 12 pour écouler vers la masse les
charges parasites accumulées sur la grille 22, cet écoulement s'effectuant par
le drain 51 et la source 53 du MOS 50, la diode 54, la borne 42 et la bougie 31.
Cette dernière, de faible résistance et parcouru par un courant faible, ramène
ainsi, sur la borne 42 une pseudo-masse.The
La liaison du circuit 5 avec la borne 42 de sortie de courant a une double
fonction. D'une part, comme cela vient d'être expliqué, elle sert à écouler les
charges parasites. D'autre part, elle peut être considérée comme une entrée
d'information, puisqu'elle fournit une référence de tension qui est comparée à
la tension de la liaison interne de masse 61. Tant que cette dernière est isolée
de la masse de la batterie 30, par le connecteur 3 ouvert, le pont diviseur 55-56
n'a pas de référence de masse si bien que son point milieu présente un
potentiel élevé qui entraíne la conduction du MOS 50. Celui-ci applique une
résistance faible entre la grille 22 et la source 23 ce qui ramène vers la masse
de la bougie 31 le potentiel de la grille 22, en bloquant nettement le MOS 2.The link of
Par contre, lorsque la liaison interne de masse 61 est correctement polarisée à
la masse de la batterie 30 à travers le connecteur 3, le potentiel au point milieu
52 passe en dessous du seuil de conduction du MOS 50. La diode 54 sert à
régler ce seuil à un niveau suffisamment haut pour compenser une éventuelle
différence de potentiel conduite par le cablage et pouvant apparaítre entre 61
et 31 et pour que la valeur de la résistance 56 ne soit pas trop faible devant
celle de la résistance 55. Ainsi, on évite que le condensateur 57 du circuit
intégrateur RC : 55-56/57 n'ait une valeur trop élevée pour obtenir une
constante de temps déterminée servant à filtrer les commutations lors des
connexions/déconnection du Connecteur 3 ou lors des
activations/désactivations de commandes gérées par le calculateur 1.On the other hand, when the
En bref, le circuit de liaison 5 comporte un comparateur de tension à deux
entrées (61 et 42) et deux sorties (51, 42) pour bloquer le MOS 2 en appliquant
un potentiel de blocage entre deux de ces électrodes (22, 23).In short, the
On comprendra que les fonctions, ci-dessus du circuit de liaison 5 peuvent être
réalisées de diverses façons et que le relais de puissance commandé peut être
autre que le MOS ici décrit. En particulier, le concept de l'invention pourraít
être mis en oeuvre en intégrant le circuit 5 dans le circuit de commande 12.
Dans ce cas, le circuit 5 pourrait par exemple servir à référencer la liaison de
masse (61) du circuit 12 à la pseudo-masse (42), c'est-à-dire que le circuit 5 ne
se substituerait pas au circuit 12 mais qu'il assurerait le fonctionnement correct
de celui-ci, à l'état repos, même en l'absence de la vraie masse (61). L'action
du circuit 5, de blocage du MOS 2, aurait ainsi lieu à travers le circuit 12. Une
commande séparée du circuit 5 sur une électrode spécifique de blocage du
relais éléctronique est tout aussi envisageable. De même, on comprendra que
la pseudo-référence de masse 42 assure le fonctionnement du circuit 5, mais
que l'action de blocage de celui-ci sur le relais électronique consiste à assurer
le maintien d'un potentiel de blocage sur une électrode de celui-ci, sans que ce
potentiel doive obligatoirement être celui de la pseudo-masse.It will be understood that the above functions of the
On notera que le rebouclage entre les deux bornes de la batterie, réalisé par le
circuit 5, est indépendant de toute notion de mise à la masse de l'une ou l'autre
borne de celle-ci.It will be noted that the loopback between the two terminals of the battery, produced by the
Claims (6)
- Control circuit for glow plugs (31) of a diesel engine, comprising a computer (1) and at least one electronic relay (2) controlled by the computer (1), charactensed by the fact that it is provided with means (5) for connecting the computer to a reference voltage (earth) via the plugs (31).
- Circuit according to claim 1, wherein the computer (1) is connected to the glow plugs (31) and to means for controlling preheating (33) respectively by two detachable connectors (3, 4).
- Circuit according to one of claims 1 and 2, wherein the electronic relay is an MOS transistor (2) and the means (15) for connecting the computer (1) to the reference voltage are arranged to apply a blocking voltage between the gate (22) and the source (23) of the MOS transistor.
- Circuit according to one of claims 1 to 3, wherein the connection means (5) comprise a second MOS transistor (50), the gate (52) of which is controlled by a divider bridge (55-56) fed between a supply terminal (21; 41) of the relay (2), said terminal being intended to be connected to a power supply (30) presenting said reference voltage, and an internal link (61) intended to be connected to the reference voltage terminal of the power supply (30).
- Circuit according to claim 4, wherein a delay capacitor (57) connects the gate (52) of the second MOS transistor (50) to its source (53).
- Circuit according to one of claims 4 and 5, wherein a diode (54) is connected in series with the source (53) of the second MOS transistor (50).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9509170 | 1995-07-27 | ||
| FR9509170A FR2737259B1 (en) | 1995-07-27 | 1995-07-27 | DIESEL ENGINE GLOW PLUG CONTROL CIRCUIT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0756083A1 EP0756083A1 (en) | 1997-01-29 |
| EP0756083B1 true EP0756083B1 (en) | 1999-06-16 |
Family
ID=9481463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19960401483 Expired - Lifetime EP0756083B1 (en) | 1995-07-27 | 1996-07-05 | Control circuit for glow plugs of diesel engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0756083B1 (en) |
| DE (1) | DE69602895T2 (en) |
| ES (1) | ES2135190T3 (en) |
| FR (1) | FR2737259B1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6146472A (en) * | 1984-08-11 | 1986-03-06 | Nippon Denso Co Ltd | Switching circuit of large current |
| JPH01174987A (en) * | 1987-12-29 | 1989-07-11 | Fujitsu Ten Ltd | Detection system for disconnection of heating element |
| JP3180250B2 (en) * | 1990-04-16 | 2001-06-25 | 日本特殊陶業株式会社 | Electrical control device for ceramic glow plug |
| JP3123261B2 (en) * | 1992-10-12 | 2001-01-09 | 株式会社デンソー | Glow plug controller |
-
1995
- 1995-07-27 FR FR9509170A patent/FR2737259B1/en not_active Expired - Fee Related
-
1996
- 1996-07-05 DE DE1996602895 patent/DE69602895T2/en not_active Expired - Fee Related
- 1996-07-05 ES ES96401483T patent/ES2135190T3/en not_active Expired - Lifetime
- 1996-07-05 EP EP19960401483 patent/EP0756083B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0756083A1 (en) | 1997-01-29 |
| ES2135190T3 (en) | 1999-10-16 |
| DE69602895T2 (en) | 2000-01-13 |
| FR2737259A1 (en) | 1997-01-31 |
| DE69602895D1 (en) | 1999-07-22 |
| FR2737259B1 (en) | 1997-09-12 |
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