EP0160130B1 - Ignition distributor for an internal-combustion engine - Google Patents

Ignition distributor for an internal-combustion engine Download PDF

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Publication number
EP0160130B1
EP0160130B1 EP84116271A EP84116271A EP0160130B1 EP 0160130 B1 EP0160130 B1 EP 0160130B1 EP 84116271 A EP84116271 A EP 84116271A EP 84116271 A EP84116271 A EP 84116271A EP 0160130 B1 EP0160130 B1 EP 0160130B1
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EP
European Patent Office
Prior art keywords
rotor
ignition
shaft
ignition distributor
distributor
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
Application number
EP84116271A
Other languages
German (de)
French (fr)
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EP0160130A1 (en
Inventor
Hartmut Brammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0160130A1 publication Critical patent/EP0160130A1/en
Application granted granted Critical
Publication of EP0160130B1 publication Critical patent/EP0160130B1/en
Expired legal-status Critical Current

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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
    • 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

Definitions

  • the invention is based on an ignition distributor according to the preamble of claim 1.
  • Such an ignition distributor is known from AU-A-509798.
  • the insulation shield provided there has the task of avoiding voltage discharges via a shunt by extending the distance between the potentials.
  • an intermediate flange is connected between the housing of the ignition distributor and the end cap made of insulating material, which has a central opening through which the rotor can be inserted and connected to the shaft of the ignition distributor.
  • This is an ignition distributor of a known type, in which the rotor is only plugged onto the end of the shaft of the distributor. In such a case, the rotor can be dismantled without great effort by removing the end cap from the intermediate flange and pulling off the ignition distributor.
  • the object of the invention is to further develop the generic ignition distributor in such a way that a structural unit consisting of a rotor and an aperture-type transmitter element can remain unchanged when assembled or disassembled as a structural unit.
  • the ignition distributor according to the invention for solving the specified object has the advantage that a minimum distance between the electrode of the rotor and the signal transmitter is maintained to prevent electrical flashovers and that a very low overall height of the ignition distributor can nevertheless be achieved.
  • the rotor and the signal transmitter can remain unchanged as a structural unit during assembly or disassembly of the insulation shield. This has significant advantages, especially when servicing or repairing the distributor.
  • FIG. 1 shows the partially sectioned side view of an ignition distributor according to the invention
  • FIG. 2 shows an insulation screen for the ignition distributor according to FIG. 1
  • FIG. 3 shows an insulation screen that is somewhat modified compared to FIG.
  • the ignition distributor shown in Figure 1 is intended for an internal combustion engine, not shown, of a motor vehicle, also not shown.
  • This ignition distributor has a base plate 1, which comprises a bearing 2 for a shaft 3 in its central region.
  • the shaft 3, which is rotatably mounted in the bearing 2 carries, on its end section protruding from the base plate 1, a coupling piece 4 which is intended for connection to the camshaft, not shown, of the internal combustion engine.
  • the inner end portion of the shaft 3 is provided with a flange 5 to which a rotor 6 is screwed.
  • the rotor 6 consists of an insulating body 7, from which a distributor finger 8 projects radially.
  • a distributor electrode 9 protrudes from the free end of the distributor finger 8 and can be moved past fixed electrodes at a certain distance.
  • One of the fixed electrodes is shown and designated 10.
  • the fixed electrodes 10 are connected to spark plugs in the cylinders of the internal combustion engine via high-voltage connections 11, not shown.
  • ignition voltage pulses are transmitted to the fixed electrodes 10, these ignition pulses being taken from an ignition coil (not shown) and fed via a high-voltage connection 12 and a sliding contact 13 to a contact plate 14 which is in electrical connection with the distributor electrode 9.
  • a diaphragm-like sensor element 15 is clamped between the flange 5 and the insulating body 7 and, together with a Hall barrier 16, forms a signal generator 17 that delivers signals for triggering the ignition.
  • the rotor 6 and the signal generator 17 are covered by a cap 18 made of insulating material, with which the high-voltage connections 11, 12 form a structural unit.
  • the connection cap 18 is fastened to the base plate 1, and in the preferred case screwed, as is indicated by the dash-dotted line 19.
  • an insulation screen 20 engages in the space between the rotor 6 and the signal transmitter 17. So that the assembly consisting of the rotor 6 and the signal generator 17 can remain unchanged during assembly and disassembly of the insulation screen 20, this screen 20 is composed of at least two individual parts 21, 22 (FIG. 2), these individual parts 21, 22 having a shell shape . This assembly takes place in such a way that the individual parts are put together. This can be done in such a way that one individual part has labyrinth-shaped grooves on the parting surfaces, which are the cross section of the parting surface of the other Item are adjusted. This also results in good dielectric strength at the parting surfaces.
  • a hinge-like connection 24 appears to be particularly suitable for this purpose. This also simplifies the manufacture of the insulation shield 20 in terms of production technology.
  • the distributor finger 8 can also be provided with a protruding bead 26 which runs along the distributor finger 8 and lies below the distributor electrode 9.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht von einem Zündverteiler nach der Gattung des Anspruchs 1 aus. Ein solcher Zündverteiler ist durch die AU-A-509798 bekannt. Der dort vorgesehene Isolationsschirm hat die Aufgabe, Spannungsableitungen über einen Nebenschluss durch Verlängerung der Wegstrecke zwischen den Potentialen zu vermeiden. Dabei ist zwischen dem Gehäuse des Zündverteilers und der Abschlusskappe aus Isolierstoff ein Zwischenflansch eingeschaltet, der einen zentralen Durchbruch aufweist, durch welchen der Läufer gesteckt und mit der Welle des Zündverteilers verbunden werden kann. Dabei handelt es sich um einen Zündverteiler bekannter Bauart, bei dem der Läufer lediglich auf das Ende der Welle des Zündverteilers aufgesteckt ist. In einem solchen Falle kann der Läufer ohne grösseren Aufwand demontiert werden, indem die Abschlusskappe vom Zwischenflansch abgenommen wird und der Zündverteiler abgezogen wird.The invention is based on an ignition distributor according to the preamble of claim 1. Such an ignition distributor is known from AU-A-509798. The insulation shield provided there has the task of avoiding voltage discharges via a shunt by extending the distance between the potentials. In this case, an intermediate flange is connected between the housing of the ignition distributor and the end cap made of insulating material, which has a central opening through which the rotor can be inserted and connected to the shaft of the ignition distributor. This is an ignition distributor of a known type, in which the rotor is only plugged onto the end of the shaft of the distributor. In such a case, the rotor can be dismantled without great effort by removing the end cap from the intermediate flange and pulling off the ignition distributor.

Jedoch bei einem Zündverteiler, bei dem der Läufer mit der Welle durch eine Verschraubung verbunden ist und zwischen Läufer und Welle ein blendenartiges Geberelement eingeklemmt ist, ist die bekannte Lösung nicht verwirklichbar, da das Geberelement bereits Teil der Masseverbindung ist und ein Isolationsschirm gegenüber diesem Potential abschirmen soll.However, in the case of an ignition distributor in which the rotor is connected to the shaft by a screw connection and a diaphragm-like sensor element is clamped between the rotor and shaft, the known solution cannot be implemented, since the sensor element is already part of the ground connection and shields an insulation screen against this potential should.

Aufgabe der Erfindung ist es, den gattungsgemässen Zündverteiler derart weiterzubilden, dass eine aus Läufer und blendenartigem Geberelement bestehende Baueinheit bei der Montage oder Demontage als Baueinheit zusammengefügt unverändert bestehen bleiben kann.The object of the invention is to further develop the generic ignition distributor in such a way that a structural unit consisting of a rotor and an aperture-type transmitter element can remain unchanged when assembled or disassembled as a structural unit.

Vorteile der ErfindungAdvantages of the invention

Der zur Lösung der vorgegebenen Aufgabe erfindungsgemässe Zündverteiler nach Patentanspruch 1 hat den Vorteil, dass ein Mindestabstand zwischen der Elektrode des Läufers und dem Signalgeber zur Verhinderung von elektrischen Überschlägen eingehalten wird und dass dennoch eine sehr niedrige Bauhöhe des Zündverteilers erreichbar ist. In einfacher Weise kann bei einer Montage oder Demontage des Isolationsschirmes der Läufer und der Signalgeber als Baueinheit unverändert bestehen bleiben. Dies hat wesentliche Vorteile, insbesondere auch bei der Wartung oder Reparatur des Zündverteilers.The ignition distributor according to the invention for solving the specified object has the advantage that a minimum distance between the electrode of the rotor and the signal transmitter is maintained to prevent electrical flashovers and that a very low overall height of the ignition distributor can nevertheless be achieved. In a simple manner, the rotor and the signal transmitter can remain unchanged as a structural unit during assembly or disassembly of the insulation shield. This has significant advantages, especially when servicing or repairing the distributor.

In den Unteransprüchen sind vorteilhafte Massnahmen für die Realisierung der Erfindung angegeben.Advantageous measures for realizing the invention are specified in the subclaims.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 die teilweise geschnittene Seitenansicht eines Zündverteilers nach der Erfindung, Figur 2 einen Isolationsschirm für den Zündverteiler nach Figur 1 und Figur 3 einen gegenüber Figur 2 etwas abgeänderten Isolationsschirm.Embodiments of the invention are shown in the drawing and explained in more detail in the following description. FIG. 1 shows the partially sectioned side view of an ignition distributor according to the invention, FIG. 2 shows an insulation screen for the ignition distributor according to FIG. 1, and FIG. 3 shows an insulation screen that is somewhat modified compared to FIG.

Beschreibung der AusführungsbeispiQleDescription of the execution examples

Der in Figur 1 dargestellte Zündverteiler soll für eine nicht dargestellte Brennkraftmaschine eines ebenfalls nicht dargestellten Kraftfahrzeuges bestimmt sein. Dieser Zündverteiler weist eine Grundplatte 1 auf, die in ihrem mittleren Bereich ein Lager 2 für eine Welle 3 umfasst. Die in dem Lager 2 drehbar gelagerte Welle 3 trägt auf ihrem aus der Grundplatte 1 herausragenden Endabschnitt ein Kupplungsstück 4, das zur Verbindung mit der nicht dargestellten Nockenwelle der Brennkraftmaschine bestimmt ist. Der innere Endabschnitt der Welle 3 ist mit einem Flansch 5 versehen, an den ein Läufer 6 angeschraubt ist. Der Läufer 6 besteht aus einem Isolierkörper 7, von dem ein Verteilerfinger 8 radial absteht. Aus dem freien Ende des Verteilerfingers 8 ragt eine Verteilerelektrode 9 heraus, die in einem bestimmten Abstand an Festelektroden vorbeibewegbar ist. Von den Festelektroden ist eine dargestellt und mit 10 bezeichnet. Die Festelektroden 10 sind über nicht näher gezeigte Hochspannungsanschlüsse 11 mit Zündkerzen in den Zylindern der Brennkraftmaschine verbunden. Mit Hilfe der Verteilerelektrode 9 werden Zündspannungsimpulse auf die Festelektroden 10 übertragen, wobei diese Zündimpulse einer nicht dargestellten Zündspule entnommen und über einen Hochspannungsanschluss 12 sowie einen Schleifkontakt 13 einer Kontaktplatte 14 zugeführt werden, die mit der Verteilerelektrode 9 in elektrischer Verbindung steht.The ignition distributor shown in Figure 1 is intended for an internal combustion engine, not shown, of a motor vehicle, also not shown. This ignition distributor has a base plate 1, which comprises a bearing 2 for a shaft 3 in its central region. The shaft 3, which is rotatably mounted in the bearing 2, carries, on its end section protruding from the base plate 1, a coupling piece 4 which is intended for connection to the camshaft, not shown, of the internal combustion engine. The inner end portion of the shaft 3 is provided with a flange 5 to which a rotor 6 is screwed. The rotor 6 consists of an insulating body 7, from which a distributor finger 8 projects radially. A distributor electrode 9 protrudes from the free end of the distributor finger 8 and can be moved past fixed electrodes at a certain distance. One of the fixed electrodes is shown and designated 10. The fixed electrodes 10 are connected to spark plugs in the cylinders of the internal combustion engine via high-voltage connections 11, not shown. With the help of the distributor electrode 9, ignition voltage pulses are transmitted to the fixed electrodes 10, these ignition pulses being taken from an ignition coil (not shown) and fed via a high-voltage connection 12 and a sliding contact 13 to a contact plate 14 which is in electrical connection with the distributor electrode 9.

Zwischen dem Flansch 5 und dem Isolierkörper 7 ist ein blendenartiges Geberelement 15 eingeklemmt, das mit einer Hall-Schranke 16 einen Signale zur Zündauslösung liefernden Signalgeber 17 bildet. Der Läufer 6 und der Signalgeber 17 sind durch eine aus Isolierstoff bestehende Kappe 18 abgedeckt, mit der die Hochspannungsanschlüsse 11, 12 eine Baueinheit bilden. Die Anschlusskappe 18 ist an der Grundplatte 1 befestigt, und zwar im bevorzugten Fall verschraubt, wie das durch die strichpunktierte Linie 19 angedeutet wird.A diaphragm-like sensor element 15 is clamped between the flange 5 and the insulating body 7 and, together with a Hall barrier 16, forms a signal generator 17 that delivers signals for triggering the ignition. The rotor 6 and the signal generator 17 are covered by a cap 18 made of insulating material, with which the high-voltage connections 11, 12 form a structural unit. The connection cap 18 is fastened to the base plate 1, and in the preferred case screwed, as is indicated by the dash-dotted line 19.

Um den räumlichen Abstand zwischen dem Läufer 6, d.h. zwischen seinen Hochspannungsteilen 14, 9, und dem Signalgeber 17 gering und somit die Bauhöhe des Zündverteilers klein zu halten, greift in den zwischen Läufer 6 und Signalgeber 17 befindlichen Freiraum ein Isolationsschirm 20 ein. Damit bei der Montage und der Demontage des Isolationsschirmes 20 die aus dem Läufer 6 und dem Signalgeber 17 bestehende Baueinheit unverändert bleiben kann, ist dieser Schirm 20 aus mindestens zwei Einzelteilen 21, 22 zusammengesetzt (Figur 2), wobei diese Einzelteile 21, 22 Schalenform haben. Dieses Zusammensetzen erfolgt in der Weise, dass die Einzelteile zusammengesteckt werden. Das kann derart geschehen, dass das eine Einzelteil an den Trennflächen labyrinthförmige Nuten aufweist, die dem Querschnitt der Trennfläche des anderen Einzelteiles angepasst sind. Es ergibt sich dadurch auch an den Trennflächen eine gute elektrische Durchschlagsfestigkeit.In order to keep the spatial distance between the rotor 6, ie between its high-voltage parts 14, 9, and the signal transmitter 17 small and thus to keep the overall height of the ignition distributor small, an insulation screen 20 engages in the space between the rotor 6 and the signal transmitter 17. So that the assembly consisting of the rotor 6 and the signal generator 17 can remain unchanged during assembly and disassembly of the insulation screen 20, this screen 20 is composed of at least two individual parts 21, 22 (FIG. 2), these individual parts 21, 22 having a shell shape . This assembly takes place in such a way that the individual parts are put together. This can be done in such a way that one individual part has labyrinth-shaped grooves on the parting surfaces, which are the cross section of the parting surface of the other Item are adjusted. This also results in good dielectric strength at the parting surfaces.

Um ein Auseinanderfallen der Einzelteile 21, 22 zu vermeiden, empfiehlt es sich, die Einzelteile mit einer flexiblen Verbindung 23 zu versehen (Figur 3). Besonders geeignet erscheint hierfür eine scharnierartige Verbindung 24. Hierdurch wird auch die Herstellung des Isolationsschirmes 20 in fertigungstechnischer Hinsicht vereinfacht.In order to prevent the individual parts 21, 22 from falling apart, it is advisable to provide the individual parts with a flexible connection 23 (FIG. 3). A hinge-like connection 24 appears to be particularly suitable for this purpose. This also simplifies the manufacture of the insulation shield 20 in terms of production technology.

Damit der Isolationsschirm 20 nach der Montage in Lage und Form sicher fixiert ist, empfiehlt es sich, im Grundbereich einen Aussenflansch 25 vorzusehen, mit dem dieser Schirm 20 zwischen der Grundplatte 1 und der Anschlusskappe 18 eingeklemmt wird.So that the insulation screen 20 is securely fixed in position and shape after assembly, it is advisable to provide an outer flange 25 in the base area, with which this screen 20 is clamped between the base plate 1 and the connection cap 18.

Zwecks zusätzlicher Wirkungsverbesserung kann der Verteilerfinger 8 noch mit einer vorstehenden Wulst 26 versehen sein, die entlang dem Verteilerfinger 8 verläuft und unterhalb der Verteilerelektrode 9 liegt.For the purpose of further improving the effectiveness, the distributor finger 8 can also be provided with a protruding bead 26 which runs along the distributor finger 8 and lies below the distributor electrode 9.

Claims (4)

1. Ignition distributor for a multi-cylinder internal combustion engine, having a shaft (3) which can be made to rotate by the internal combustion engine, furthermore having a rotor (6), which is arranged on the shaft (3), is provided with a radially protruding distributor arm (8) and by which ignition voltage pulses are distributed to fixed electrodes (10) which are arranged in a sealing cap (18) of insulating material placed on the housing of the ignition distributor, the rotor protruding through a central opening of an insulating shield (20) arranged between the sealing cap (18) and the housing and being connected to the shaft (3), characterized in that the rotor (6) is connected to the shaft (3) by a screw connection, in that a diaphragm-like emitter element (15), which is part of a signal emitter (17) providing signals for initiating ignition, is clamped between rotor (6) and shaft (3), and in that the insulating shield (20), which is assembled from at least two shell-shaped individual parts (21, 22) and is secured in shape and position by the sealing cap (18) covering the rotor (6) and the emitter element, fits into the free space between rotor (6) and signal emitter (17).
2. Ignition distributor according to Claim 1, characterized in that the individual parts (21, 22) can be fitted together.
3. Ignition distributor according to Claim 1, characterized in that the individual parts (21, 22) have a flexible connection (23).
4. Ignition distributor according to Claim 3, characterized in that the individual parts (21, 22) are connected together hinge-fashion.
EP84116271A 1984-03-10 1984-12-22 Ignition distributor for an internal-combustion engine Expired EP0160130B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3408829 1984-03-10
DE19843408829 DE3408829A1 (en) 1984-03-10 1984-03-10 DISTRIBUTOR FOR A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

Publications (2)

Publication Number Publication Date
EP0160130A1 EP0160130A1 (en) 1985-11-06
EP0160130B1 true EP0160130B1 (en) 1989-05-03

Family

ID=6230112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116271A Expired EP0160130B1 (en) 1984-03-10 1984-12-22 Ignition distributor for an internal-combustion engine

Country Status (7)

Country Link
EP (1) EP0160130B1 (en)
JP (1) JPS60209668A (en)
AU (1) AU569778B2 (en)
BR (1) BR8501042A (en)
DE (2) DE3408829A1 (en)
ES (1) ES8606741A1 (en)
MX (1) MX155989A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3601381A1 (en) * 1986-01-18 1987-07-23 Bosch Gmbh Robert UNINTERRUPTIBLE DISTRIBUTOR FOR ELECTRONIC IGNITION SYSTEMS FOR INTERNAL COMBUSTION ENGINES
FR2623252B1 (en) * 1987-11-16 1990-02-23 Equip Electr Moteur IGNITION DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINE OF MOTOR VEHICLE

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596695A (en) * 1968-10-08 1971-08-03 Alfa Romeo Spa Protective hood for ignition distributors of motor vehicles
FR2034279A1 (en) * 1969-03-07 1970-12-11 Royer Bernard
US4011851A (en) * 1975-08-25 1977-03-15 Beutler Eden E Distributor assembly for a vehicle
AU509798B2 (en) * 1977-02-28 1980-05-22 Robert Bosch (Australia) Proprietary Ltd. Engine distributor insert
DE7917194U1 (en) * 1979-06-15 1980-11-27 Robert Bosch Gmbh, 7000 Stuttgart Ignition distributors for internal combustion engines
JPS5719614A (en) * 1980-07-11 1982-02-01 Hitachi Ltd Device for sensing rotary angle
FR2518178A1 (en) * 1981-12-16 1983-06-17 Ducellier & Cie IGNITION DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINE

Also Published As

Publication number Publication date
BR8501042A (en) 1985-10-29
ES541096A0 (en) 1986-04-16
EP0160130A1 (en) 1985-11-06
DE3478047D1 (en) 1989-06-08
AU569778B2 (en) 1988-02-18
MX155989A (en) 1988-06-10
JPS60209668A (en) 1985-10-22
AU3966985A (en) 1985-09-12
ES8606741A1 (en) 1986-04-16
DE3408829A1 (en) 1985-09-12

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