EP0432741A1 - Ignition distributor for combustion engines - Google Patents
Ignition distributor for combustion engines Download PDFInfo
- Publication number
- EP0432741A1 EP0432741A1 EP90123855A EP90123855A EP0432741A1 EP 0432741 A1 EP0432741 A1 EP 0432741A1 EP 90123855 A EP90123855 A EP 90123855A EP 90123855 A EP90123855 A EP 90123855A EP 0432741 A1 EP0432741 A1 EP 0432741A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distributor
- electrode
- embedded
- rotor
- cap
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 description 8
- 239000000057 synthetic resin Substances 0.000 description 8
- 239000004033 plastic Substances 0.000 description 5
- 210000001015 abdomen Anatomy 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
- H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
-
- 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
- F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
- F02P7/021—Mechanical distributors
- F02P7/022—Details of the distributor rotor or electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/60—Devices for interrupted current collection, e.g. commutating device, distributor, interrupter
Definitions
- the invention relates to an ignition distributor with the features specified in the preamble of claim 1.
- Such an ignition distributor is described in DE - 37 43 940 A1.
- the distributor is attached directly to the engine block, so that it forms the lower part of the distributor housing, in which the distributor rotor is rotatably mounted.
- the top of the ignition distributor housing is usually a cap made of a synthetic resin (generally a polyester synthetic resin or an epoxy resin).
- This distributor cap has a plurality of fixedly arranged electrodes (fixed electrodes) on its inner side distributed around the circumference, as well as a central electrode which transmits the ignition voltage to the electrode of the distributor rotor, which from there overturns through an air gap to the fixed electrodes.
- the distributor Due to its location directly on the engine block, the distributor is exposed to a high operating temperature of approximately 130 ° C. All elements of the distributor must be able to withstand this temperature in the long term.
- the invention has for its object to design an ignition distributor of the type mentioned with as little effort as possible so that it has a longer life.
- the center electrode has been positively embedded in the distributor cap and the center electrode has been secured against longitudinal displacement and rotation by forming shoulders by partially unscrewing the sheath and forming a non-circular outline by milling off on one side, the resulting edges are avoided according to the invention .
- the manifold has a much longer service life cap reached.
- This success shows that, in the known distributor, the crack formation due to the combined thermal and electrical load on the central electrode has its origin at the edges embedded in the synthetic resin of the distributor cap. Avoiding these edges is thus essential to the invention.
- the use of a rounded center electrode makes the ignition distributor only slightly more expensive, but leads to considerable cost savings due to the many times longer service life over the operating time of the motor vehicle and - which is usually even more important for the driver - increases the reliability of the motor vehicle.
- the fixed electrodes do not require a correspondingly rounded outer surface; it is cheaper for them if they are angular in the embedded area.
- rounding radii greater than 0.5 mm, preferably greater than 1 mm.
- a service life was achieved in the test that corresponds to a travel distance of 100,000 km; the service life could therefore be increased by a factor of 10.
- the center electrode In order to secure the center electrode against longitudinal displacements, it requires an outer surface which has a shape deviating from the rectangular shape in longitudinal section; in order to secure it against twisting, it needs a cross-section deviating from the circular shape. In both cases, the deviations should be formed by roundings, so that the central electrode is given a belly and / or a waist and has a preferably oval cross section at least over part of the length of its embedded section.
- the ignition distributor shown in Figure 1 has a distributor rotor 1, which is attached to the head 2 of the camshaft 3 of an internal combustion engine.
- the area of the engine block 4 surrounding the head 2 of the camshaft 3 is part of the housing of the ignition distributor and is provided for this purpose with a flat recess 5 into which a shell 6 made of synthetic resin is inserted.
- the ignition distributor housing is closed by a distributor cap 7, which is screwed to the engine block 4 by screws 8 and thereby overlaps the edge of the shell 6 and fixes the shell 6, a sealing ring being used to seal the interior of the distributor between the distributor cap 7 and the shell 6 9 is provided.
- the distributor cap has a central dome 10 for receiving a central electrode 11 and a number of outer domes 12 corresponding to the number of cylinders of the internal combustion engine for receiving fixed electrodes 13, which have a surface 13a lying on the inside of the distributor cap and facing the longitudinal central axis 14 of the distributor.
- the center electrode 11 has a cylindrical extension 14, which leads to a first electrode 15 of the distributor rotor 1, a narrow air gap remaining between the cylindrical section 14 of the center electrode and the first electrode 15, so that there is a spark gap between them.
- the first electrode 15 is connected via an electrical line, in which an electrical resistor 16 (interference suppression) can be connected to a second electrode 17, which is arranged at an end of the distributor rotor 1 remote from the axis of rotation 14 and, when the distributor rotor rotates, at the Surfaces 13a of the fixed electrodes 13 passes, whereby spark gaps are also formed there.
- the central electrode 11 is connected to an electrical resistor 18 embedded in the central dome 10, which in turn is connected to an electrical contact piece 19.
- the fixed electrodes 13 are connected to similar contact pieces 20.
- the contact pieces 19 and 20 serve to receive electrical plugs.
- the center electrode in the distributor cap 7 which is made of a synthetic resin, cannot twist and cannot move longitudinally, it is positively embedded in the synthetic resin. To achieve the positive locking, it has in its embedded section a non-cylindrical outer surface, the shape of which is shown in FIGS. 2 and 3.
- the center electrode consists of a section 22 embedded in the synthetic resin of the distributor cap and of the cylindrical section 14 protruding therefrom.
- the embedded section 22 contains two bellies 23 and 24, between rule a waist 25, and a hollow cylindrical portion 26, in which one end of the resistor 18 is inserted.
- the outer surface of the center electrode 11 is cylindrical, with the exception of the region of the thicker belly 23, which is oval in cross section.
- the further electrodes 13, 15, 17 in the ignition distributor can be appropriately rounded in the section with which they are embedded in synthetic resin, but this is not absolutely necessary since they are not subjected to as great a load as the center electrode 11.
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
Description
Die Erfindung geht aus von einem Zündverteiler mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen. Ein solcher Zündverteiler ist in der DE - 37 43 940 A1 beschrieben.The invention relates to an ignition distributor with the features specified in the preamble of claim 1. Such an ignition distributor is described in DE - 37 43 940 A1.
Bei modernen Motoren ist der Zündverteiler unmittelbar auf dem Motorblock befestigt, so dass dieser das Unterteil des Zündverteilergehäuses bildet, in welchem der Verteilerläufer drehbar gelagert ist. Das Oberteil des Zündverteilergehäuses ist in üblicher Weise eine Kappe aus einem Kunstharz (im allgemeinen ein Polyester-Kunstharz oder ein Epoxidharz). Diese Verteilerkappe trägt auf ihrer Innenseite am Umfang verteilt mehrere fest angeordnete Elektroden (Festelektroden) sowie eine Mittelelektrode, welche die Zündspannung an die Elektrode des Verteilerläufers überträgt, die von dort durch einen Luftspalt auf die Festelektroden überschlägt.In modern engines, the distributor is attached directly to the engine block, so that it forms the lower part of the distributor housing, in which the distributor rotor is rotatably mounted. The top of the ignition distributor housing is usually a cap made of a synthetic resin (generally a polyester synthetic resin or an epoxy resin). This distributor cap has a plurality of fixedly arranged electrodes (fixed electrodes) on its inner side distributed around the circumference, as well as a central electrode which transmits the ignition voltage to the electrode of the distributor rotor, which from there overturns through an air gap to the fixed electrodes.
Durch seine Anordnung unmittelbar auf dem Motorblock ist der Zündverteiler einer hohen Betriebstemperatur von ungefähr 130° C ausgesetzt. Dieser Temperatur müssen alle Elemente des Zündverteilers auf Dauer standhalten können.Due to its location directly on the engine block, the distributor is exposed to a high operating temperature of approximately 130 ° C. All elements of the distributor must be able to withstand this temperature in the long term.
Daß die hohe Betriebstemperatur nachteilige Folgen hat, wurde offenbar, nachdem man die Mittelelektrode der Verteilerkappe zunächst - wie bei Zündverteilern üblich, die in einem Abstand vom Motorblock angeordnet sind - als Gleitkohle-Elektrode ausbildete, welche federnd gegen die ihr gegenüberliegende Elektrode des Verteilerläufers gedrückt wird. Es zeigte sich nämlich, daß die Gleitkohle-Elektroden bei den hohen Betriebstemperaturen bruchanfällig sind. Es ist deshalb vorgeschlagen worden (DE - 37 43 940 A1), dem Verteilerläufer die Zündspannung nicht mittels eines Gleitkontakts, sondern mittels einer zwischen dem Verteilerläufer und der Mittelelektrode gebildeten Funkenstrecke zuzuführen. In diesem Fall kann die Mittelelektrode in die Verteilerkappe fest eingebettet und aus Metall gebildet werden. Damit vermeidet man zwar die bruchanfälligen Gleitkohle-Elektroden, handelt sich aber neue Probleme ein. Die Funkenüberschläge bei einer elektrischen Spannung zwischen der Mittelelektrode und der Elektrode des Verteilerläufers von ungefähr 35 kV führen zu einer erheblichen Belastung der Elektroden und des Kunststoffs, in welchen die Elektroden eingebettet sind. Jeder Entladungsfunken setzt Energie frei, die nicht nur die Elektroden, sondern auch den umgebenden Kunststoff aufheizt. Zugleich entstehen in der Atmosphäre des Zündverteilers chemisch reaktive Verbindungen. Entladungsfunken treten zwar auch zwischen dem Verteilerläufer und den Festelektroden auf, weil zur Übertragung der Zündspannung dort seit jeher eine Funkenstrecke verwendet wird. Bei den Festelektroden ist es bisher deswegen aber nicht zu Problemen gekommen, weil an ihnen nur einmal pro Umlauf des Verteilerläufers ein Funken überspringt. An der Mittelelektrode schlägt jedoch der Funken - entsprechend der Anzahl der Zylinder des Motors - mehrere Male im Verlauf einer Verteilerläuferumdrehung über, so daß die Mittelelektrode der Verteilerkappe um ein Vielfaches stärker belastet ist, als die Festelektroden, wobei erschwerend hinzukommt, daß sich der unmittelbar auf dem Motorblock angebrachte Zündverteiler ohnehin auf einer hohen Betriebstemperatur befindet und der Kunststoff, aus welchem die Verteilerkappe gebildet ist, gleichzeitig mit der hohen elektrischen Spannung von bis zu 35 kV belastet wird. Es entstehen deshalb in dem die Mittelelektrode umgebenden Kunststoff Risse, welche nach einer Fahrstrecke von ungefähr 10.000 km sichtbar werden. In weiterer Folge verstärken und vertiefen sich die Risse und es kommt dazu, daß Teile des Kunststoffs herausbröckeln und herausbrechen. Um dem zu begegnen, wird vom Kraftfahrzeughersteller empfohlen, die Verteilerkappe und den Verteilerläufer grundsätzlich nach einer Fahrstrecke von 10.000 km auszuwechseln. Das führt zu erhöhten Servicekosten.The fact that the high operating temperature has adverse effects became apparent after the central electrode of the distributor cap was initially designed as a sliding carbon electrode, which is resiliently pressed against the electrode of the distributor rotor, as is usual with ignition distributors which are arranged at a distance from the engine block . It has been shown that the sliding carbon electrodes are prone to breakage at the high operating temperatures. It has therefore been proposed (DE - 37 43 940 A1) not to supply the ignition rotor with the ignition voltage by means of a sliding contact, but rather by means of a spark gap formed between the distributor rotor and the center electrode. In this case, the center electrode can be firmly embedded in the distributor cap and formed from metal. This avoids the fragile sliding carbon electrodes, but it creates new problems. The arcing at an electrical voltage of approximately 35 kV between the center electrode and the electrode of the distributor rotor leads to a considerable load on the electrodes and the plastic in which the electrodes are embedded. Every discharge spark releases energy that not only heats up the electrodes, but also the surrounding plastic. At the same time, chemically reactive compounds are created in the atmosphere of the distributor. Discharge sparks also occur between the distributor rotor and the fixed electrodes, because a spark gap has always been used there to transmit the ignition voltage. So far, there have been no problems with the fixed electrodes, because a spark jumps only once per revolution of the distributor rotor. At the center electrode, however, the spark flashes - corresponding to the number of cylinders in the engine - several times in the course of a distributor rotor revolution, so that the center electrode of the distributor cap is many times stronger is loaded than the fixed electrodes, which complicates the fact that the ignition distributor directly attached to the engine block is in any case at a high operating temperature and the plastic from which the distributor cap is formed is simultaneously loaded with the high electrical voltage of up to 35 kV . Therefore, cracks develop in the plastic surrounding the center electrode, which become visible after a driving distance of approximately 10,000 km. Subsequently, the cracks intensify and deepen and parts of the plastic crumble and break out. In order to counter this, the motor vehicle manufacturer recommends that the distributor cap and the distributor rotor be changed after a driving distance of 10,000 km. This leads to increased service costs.
Der Erfindung liegt die Aufgabe zugrunde, einen Zündverteiler der eingangs genannten Art mit möglichst wenig Aufwand so auszubilden, daß er eine längere Lebensdauer hat.The invention has for its object to design an ignition distributor of the type mentioned with as little effort as possible so that it has a longer life.
Diese Aufgabe wird gelöst durch einen Zündverteiler mit den im Anspruch 1 bzw. durch die Verwendung einer Mittelelektrode mit den im Anspruch 6 angegebenen Merkmalen. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by an ignition distributor having the features specified in claim 1 or by using a center electrode having the features specified in
Bei bekannten Zündverteilern hat man für eine formschlüssige Einbettung der Mittelelektrode in die Verteilerkappe gesorgt und die Mittelelektrode gegen Längsverschiebungen und Drehungen gesichert, indem man durch teilweises Abdrehen des Mantels Schultern gebildet und durch einseitiges Abfräsen einen unrunden Umriss gebildet hat, die dabei entstehenden Kanten werden erfindungsgemäß vermieden. Auf diese Weise wird eine vielfach höhere Lebensdauer der Verteiler kappe erreicht. Dieser Erfolg zeigt, daß bei den bekannten Zündverteilern die Rißbildung aufgrund der kombinierten thermischen und elektrischen Belastung der Mittelelektrode ihren Ausgang an den im Kunstharz der Verteilerkappe eingebetteten Kanten genommen hat. Somit kommt dem Vermeiden dieser Kanten erfindungswesentliche Bedeutung zu. Die Verwendung einer gerundeten Mittelelektrode verteuert den Zündverteiler nur unwesentlich, führt aber wegen der auf ein Vielfaches verlängerten Lebensdauer über die Betriebszeit des Kraftfahrzeuges gerechnet zu einer erheblichen Kostenersparnis und - was für den Autofahrer meist noch wichtiger ist - erhöht die Zuverlässigkeit des Kraftfahrzeuges. Die Festelektroden benötigen anders als die Mittelelektrode keine entsprechend gerundete Mantelfläche; bei ihnen ist es günstiger, wenn sie im eingebetteten Bereich kantig ausgebildet sind.In known ignition distributors, the center electrode has been positively embedded in the distributor cap and the center electrode has been secured against longitudinal displacement and rotation by forming shoulders by partially unscrewing the sheath and forming a non-circular outline by milling off on one side, the resulting edges are avoided according to the invention . In this way, the manifold has a much longer service life cap reached. This success shows that, in the known distributor, the crack formation due to the combined thermal and electrical load on the central electrode has its origin at the edges embedded in the synthetic resin of the distributor cap. Avoiding these edges is thus essential to the invention. The use of a rounded center electrode makes the ignition distributor only slightly more expensive, but leads to considerable cost savings due to the many times longer service life over the operating time of the motor vehicle and - which is usually even more important for the driver - increases the reliability of the motor vehicle. Unlike the central electrode, the fixed electrodes do not require a correspondingly rounded outer surface; it is cheaper for them if they are angular in the embedded area.
Damit der Gewinn an Lebensdauer nicht zu niedrig ausfällt, wird empfohlen, die Rundungsradien größer als 0,5 mm, vorzugsweise größer als 1 mm zu wählen. Bei Rundungsradien, die größer als 1 mm sind, wurde im Versuch eine Lebensdauer erreicht, die einer Fahrstrecke von 100.000 km entspricht; die Lebensdauer konnte deshalb um einen Faktor 10 erhöht werden.So that the gain in service life is not too low, it is recommended to choose the rounding radii greater than 0.5 mm, preferably greater than 1 mm. In the case of rounding radii that are greater than 1 mm, a service life was achieved in the test that corresponds to a travel distance of 100,000 km; the service life could therefore be increased by a factor of 10.
Um die Mittelelektrode gegen Längsverschiebungen zu sichern, benötigt sie eine Mantelfläche, die im Längsschnitt eine von der Rechteckform abweichende Gestalt hat; um sie gegen Verdrehungen zu sichern, benötigt sie einen von der Kreisform abweichenden Querschnitt. In beiden Fällen sollen die Abweichungen durch Rundungen gebildet sein, so daß die Mittelelektrode einen Bauch und/oder eine Taille erhält und wenigstens auf einem Teil der Länge ihres eingebetteten Abschnittes einen vorzugsweise ovalen Querschnitt hat.In order to secure the center electrode against longitudinal displacements, it requires an outer surface which has a shape deviating from the rectangular shape in longitudinal section; in order to secure it against twisting, it needs a cross-section deviating from the circular shape. In both cases, the deviations should be formed by roundings, so that the central electrode is given a belly and / or a waist and has a preferably oval cross section at least over part of the length of its embedded section.
Ein Ausführungsbeispiel der Erfindung ist schematisch in den beigefügten Zeichnungen dargestellt.
- Figur 1
- zeigt einen Zündverteiler im Längsschnitt,
- Figur 2
- zeigt als Detail vergrößert die Mittelelektrode der Verteilerkappe in einer teilweise geschnittenen Seitenansicht, und
Figur 3- zeigt den Querschnitt III-III durch die in Figur 2 dargestellte Mittelelektrode.
- Figure 1
- shows an ignition distributor in longitudinal section,
- Figure 2
- shows as an enlarged detail the center electrode of the distributor cap in a partially sectioned side view, and
- Figure 3
- shows the cross section III-III through the center electrode shown in Figure 2.
Der in Figur 1 dargestellte Zündverteiler hat einen Verteilerläufer 1,welcher auf dem Kopf 2 der Nockenwelle 3 eines Verbrennungsmotors befestigt ist. Der den Kopf 2 der Nockenwelle 3 umgebende Bereich des Motorblocks 4 ist ein Teil des Gehäuses des Zündverteilers und ist zu diesem Zweck mit einer flachen Ausnehmung 5 versehen, in welche eine Schale 6 aus Kunstharz eingesetzt ist. Das Zündverteilergehäuse wird abgeschlossen durch eine Verteilerkappe 7, welche durch Schrauben 8 mit dem Motorblock 4 verschraubt ist und dabei den Rand der Schale 6 übergreift und die Schale 6 fixiert, wobei zur Abdichtung des Innenraums des Zündverteilers zwischen der Verteilerkappe 7 und der Schale 6 ein Dichtungsring 9 vorgesehen ist.The ignition distributor shown in Figure 1 has a distributor rotor 1, which is attached to the head 2 of the
Die Verteilerkappe hat einen Mitteldom 10 zur Aufnahme einer Mittelelektrode 11 und eine der Anzahl der Zylinder des Verbrennungsmotors entsprechende Anzahl von Außendomen 12 zur Aufnahme von Festelektroden 13, welche eine auf der Innenseite der Verteilerkappe liegende, der Längsmittelachse 14 des Zündverteilers zugewandte Oberfläche 13a haben.The distributor cap has a
Die Mittelelektrode 11 hat einen zylindrischen Fortsatz 14, welcher zu einer ersten Elektrode 15 des Verteilerläufers 1 führt, wobei zwischen dem zylindrischen Abschnitt 14 der Mittelelektrode und der ersten Elektrode 15 ein enger Luftspalt verbleibt, so daß eine Funkenstrecke zwischen ihnen besteht. Die erste Elektrode 15 ist über eine elektrische Leitung, in welcher ein elektrischer Widerstand 16 (Entstörwiderstand) liegen kann, mit einer zweiten Elektrode 17 verbunden, welche an einem von der Drehachse 14 entfernten Ende des Verteilerläufers 1 angeordnet ist und bei Drehung des Verteilerläufers an den Oberflächen 13a der Festelektroden 13 vorbeiläuft, wobei auch dort Funkenstrecken gebildet werden.The
Die Mittelelektrode 11 ist mit einem in den Mitteldom 10 eingebetteten elektrischen Widerstand 18 verbunden, der seinerseits mit einem elektrischen Kontaktstück 19 verbunden ist. Die Festelektroden 13 sind mit ähnlichen Kontaktstücken 20 verbunden. Die Kontaktstücke 19 und 20 dienen zur Aufnahme von elektrischen Steckern.The
Damit sich die Mittelelektrode in der aus einem Kunstharz geformten Verteilerkappe 7 nicht verdrehen und nicht längs verschieben kann, ist sie formschlüssig in das Kunstharz eingebettet. Zur Erzielung des Formschlusses hat sie in ihrem eingebetteten Abschnitt eine nicht-zylindrische Mantelfläche, deren Gestalt in den Figuren 2 und 3 dargestellt ist.So that the center electrode in the
Die Mittelelektrode besteht aus einem in das Kunstharz der Verteilerkappe eingebetteten Abschnitt 22 und aus dem daraus vorstehenden zylindrischen Abschnitt 14. Der eingebettete Abschnitt 22 enthält zwei Bäuche 23 und 24, zwi schen denen eine Taille 25 liegt, sowie einen hohlzylindrischen Abschnitt 26, in welchen das eine Ende des Widerstandes 18 gesteckt wird.The center electrode consists of a section 22 embedded in the synthetic resin of the distributor cap and of the
Die Mantelfläche der Mittelelektrode 11 ist - mit Ausnahme des Bereiches des dickeren Bauches 23, welcher im Querschnitt oval ist - zylindrisch.The outer surface of the
Die weiteren Elektroden 13, 15, 17 im Zündverteiler können in dem Abschnitt, mit welchem sie in Kunstharz eingebettet sind, entsprechend gerundet sein, doch ist das nicht unbedingt erforderlich, da sie nicht einer so großen Belastung ausgesetzt sind, wie die Mittelelektrode 11.The
Claims (6)
und mit einer das Gehäuse abschließenden Verteilerkappe, in welche am Umfang verteilt mehrere mit der zweiten Elektrode des Verteilerläufers zusammenarbeitende Festelektroden sowie eine Mittelelektrode eingebettet sind, welche unter Bildung einer Funkenstrecke in einem Abstand von der ersten Elektrode des Verteilerläufers endet,
wobei die Mittelelektrode zur Erzielung eines Formschlusses mit der Verteilerkappe in ihrem eingebetteten Abschnitt eine nicht-zylindrische Mantelfläche hat,
dadurch gekennzeichnet, daß die nicht-zylindrische Mantelfläche der Mittelelektrode (11) in ihrem eingebetteten Abschnitt (22) unter Vermeidung jeglicher Kanten gerundet ist.Ignition distributor for internal combustion engines with a housing in which a distributor rotor is rotatably mounted, which rotor has a first electrode close to its axis of rotation and a second electrode at an end remote from the axis of rotation and an electrical line connecting the two electrodes between them.
and with a distributor cap which closes the housing and in which several fixed electrodes cooperating with the second electrode of the distributor rotor and a center electrode are embedded, which ends to form a spark gap at a distance from the first electrode of the distributor rotor,
the center electrode for achieving a positive fit with the distributor cap has a non-cylindrical outer surface in its embedded section,
characterized in that the non-cylindrical outer surface of the center electrode (11) is rounded in its embedded section (22) while avoiding any edges.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3941284A DE3941284A1 (en) | 1989-12-14 | 1989-12-14 | DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINES |
| DE3941284 | 1989-12-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0432741A1 true EP0432741A1 (en) | 1991-06-19 |
| EP0432741B1 EP0432741B1 (en) | 1993-10-06 |
Family
ID=6395447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90123855A Expired - Lifetime EP0432741B1 (en) | 1989-12-14 | 1990-12-11 | Ignition distributor for combustion engines |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5078103A (en) |
| EP (1) | EP0432741B1 (en) |
| JP (1) | JPH0599109A (en) |
| DE (2) | DE3941284A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4101652A1 (en) * | 1990-10-18 | 1992-07-30 | Duerrwaechter E Dr Doduco | DISTRIBUTOR CAP OF AN IGNITION DISTRIBUTOR WITH A SHIELDING HOOD AND SHIELDING HOOD THEREFOR |
| EP1564846A1 (en) * | 2004-02-16 | 2005-08-17 | GEM Terminal Ind.Co., Ltd. | Prong structure of a plug |
| JP5011888B2 (en) | 2006-08-22 | 2012-08-29 | マックス株式会社 | Gas fired driving tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1869162A (en) * | 1929-12-26 | 1932-07-26 | Waterbury Brass Goods Corp | Molded insert for compounds |
| US2918521A (en) * | 1957-02-11 | 1959-12-22 | Cambridge Thermionic Corp | Electrically insulating devices |
| FR1535251A (en) * | 1967-08-29 | 1968-08-02 | Hora Werk G M B H | Miniature socket with pins |
| EP0198449A1 (en) * | 1985-04-13 | 1986-10-22 | Gerhard Spahn | Manufacturing process of an ignition distributor cap |
| DE3743940A1 (en) * | 1987-12-23 | 1989-07-06 | Bayerische Motoren Werke Ag | Ignition distributor for internal combustion engines |
| DE3837808A1 (en) * | 1988-11-08 | 1990-05-10 | Bosch Gmbh Robert | IGNITION DISTRIBUTOR FOR IGNITION SYSTEMS FOR INTERNAL COMBUSTION ENGINES |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1699829A (en) * | 1928-03-16 | 1929-01-22 | Gen Comb Company | Spark intensifier |
| US2006341A (en) * | 1934-02-03 | 1935-07-02 | John H Lee | Ignition device |
| US2464533A (en) * | 1947-05-21 | 1949-03-15 | Thomas R Shearer | Positive contact ignition assembly |
| FR2376305A2 (en) * | 1976-12-29 | 1978-07-28 | Snecma | PROCESS FOR REDUCING POLLUTION DUE TO INTERNAL COMBUSTION ENGINES AND ENGINES WITH AN APPLICATION |
| US4153030A (en) * | 1977-06-03 | 1979-05-08 | Ford Motor Company | Ignition distributor with wide rotor registration angle |
| US4129107A (en) * | 1977-08-22 | 1978-12-12 | General Motors Corporation | Magnetic pickup type ignition distributor |
| DE3329647C2 (en) * | 1983-08-17 | 1993-10-28 | Bosch Gmbh Robert | Insulating cap to cover an ignition distributor |
| DE3347409A1 (en) * | 1983-12-29 | 1985-07-11 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR DISTRIBUTING VOLTAGE DISTRIBUTION IN COMBINED IGNITION SYSTEMS FOR COMBUSTION ENGINES |
| JPS63146169U (en) * | 1987-03-13 | 1988-09-27 | ||
| KR890002538A (en) * | 1987-07-24 | 1989-04-10 | 시끼 모리야 | Distributor for internal combustion engine |
| JPH0174376U (en) * | 1987-11-09 | 1989-05-19 |
-
1989
- 1989-12-14 DE DE3941284A patent/DE3941284A1/en not_active Withdrawn
-
1990
- 1990-12-11 DE DE90123855T patent/DE59003005D1/en not_active Expired - Fee Related
- 1990-12-11 EP EP90123855A patent/EP0432741B1/en not_active Expired - Lifetime
- 1990-12-13 US US07/626,835 patent/US5078103A/en not_active Expired - Fee Related
- 1990-12-13 JP JP2410124A patent/JPH0599109A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1869162A (en) * | 1929-12-26 | 1932-07-26 | Waterbury Brass Goods Corp | Molded insert for compounds |
| US2918521A (en) * | 1957-02-11 | 1959-12-22 | Cambridge Thermionic Corp | Electrically insulating devices |
| FR1535251A (en) * | 1967-08-29 | 1968-08-02 | Hora Werk G M B H | Miniature socket with pins |
| EP0198449A1 (en) * | 1985-04-13 | 1986-10-22 | Gerhard Spahn | Manufacturing process of an ignition distributor cap |
| DE3743940A1 (en) * | 1987-12-23 | 1989-07-06 | Bayerische Motoren Werke Ag | Ignition distributor for internal combustion engines |
| DE3837808A1 (en) * | 1988-11-08 | 1990-05-10 | Bosch Gmbh Robert | IGNITION DISTRIBUTOR FOR IGNITION SYSTEMS FOR INTERNAL COMBUSTION ENGINES |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0432741B1 (en) | 1993-10-06 |
| US5078103A (en) | 1992-01-07 |
| DE59003005D1 (en) | 1993-11-11 |
| JPH0599109A (en) | 1993-04-20 |
| DE3941284A1 (en) | 1991-06-20 |
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