EP0447659B1 - Connecteur pour bougie d'allumage - Google Patents

Connecteur pour bougie d'allumage Download PDF

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Publication number
EP0447659B1
EP0447659B1 EP90124885A EP90124885A EP0447659B1 EP 0447659 B1 EP0447659 B1 EP 0447659B1 EP 90124885 A EP90124885 A EP 90124885A EP 90124885 A EP90124885 A EP 90124885A EP 0447659 B1 EP0447659 B1 EP 0447659B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
plug connector
connector according
ribs
end section
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
Application number
EP90124885A
Other languages
German (de)
English (en)
Other versions
EP0447659A1 (fr
Inventor
Dieter Reinmüller
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.)
OFFERTA LICENZA AL PUBBLICO OFFERTA LICENZA
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 EP0447659A1 publication Critical patent/EP0447659A1/fr
Application granted granted Critical
Publication of EP0447659B1 publication Critical patent/EP0447659B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs

Definitions

  • the invention relates to a spark plug connector according to the preamble of claim 1.
  • a spark plug connector is already known, which is provided with a tubular connecting piece made of plastic. This is snapped onto the insulating body of the spark plug connector and encloses part of the ignition cable in a force-fitting manner.
  • This connector is preferably used as an assembly aid in cases where the spark plug connector is to be attached to a spark plug located in a long niche.
  • the connector for the plugging and unplugging process of the spark plug connector only fits a specific engine geometry, so that on the one hand the connector has a dimensioned projection to the engine block when plugged in, which still grips the connector for Removal process allows, but on the other hand, the overhang should not be exceeded if possible because of the cramped conditions in the engine compartment, for example, to keep the ignition cable emerging from the connector away from hot parts of the unit.
  • This limited length adjustment of the connector complicates the especially when the engine is still hot Handling of the spark plug connector, so that during maintenance work, the spark plug connector is sometimes pulled out by pulling the ignition cable with the risk of the spark plug connector failing to function.
  • the spark plug connector according to the invention with the characterizing features of claim 1 has the advantage that the connector, which rests over part of the length of the ignition cable, has radially directed ribs in this area which form positive connections when the two-part connector is joined to the ignition cable, so that the The ignition cable forms a firm association with the connector.
  • axially directed forces for pulling off the spark plug connector from the spark plug can be applied directly to the ignition cable without damage to the spark plug connector. This makes it possible to run the connector only in the length that the push-on operation can be carried out. This means that when the spark plug connector is installed, there is no need to protrude the connector beyond the engine block.
  • Another advantage of the configuration according to the invention is that the risk of improper handling of the ignition cable with the impending loss of function of the spark plug connector is avoided even in hot engines.
  • FIG. 1 shows a partial longitudinal section of a spark plug connector with connecting piece and ignition cable
  • FIG. 1a shows a detail from FIG. 1 with parts of the spark plug connector and the connecting piece, rotated by 90 ° with respect to FIG. 1
  • FIG. 2 shows a radial section of the connecting piece along the line II-II
  • FIG. 3 shows a radial section along the line III-III.
  • the embodiment shown in Figure 1 of the spark plug connector according to the invention essentially consists of an insulating body 11, in which an ignition cable 12 is inserted and fastened there in a manner known per se and not shown in detail, furthermore from a fixed length with the insulating body 11 over a partial length and this enveloping shield part 13 and a sleeve-shaped connecting piece 14 fixed thereon, which comprises a partial section of the insulating body 11, the shielding part 13 and the ignition cable 12.
  • the sleeve-shaped shielding part 13 which extends over its longitudinal extent forms part of a lateral surface 15 of the spark plug connector, projects beyond the insulating body 11 at its spark plug end.
  • the shielding part 13 has a first end section 16 serving to fix the connecting piece 14 with two peripherally extending projections 17 and two axially extending projections 18.
  • the mutually opposite lugs 17 in the form of convex beads each extend over a partial area of a semicircle; in between, a single projection 18 with a rectangular cross section extends axially over the length of the first end section 16.
  • the shoulders 17 are surrounded by an annular groove 19 (shown in FIG. 1a) and the projections 18 by two longitudinal grooves 21 mounted in an inner wall 22 of a second end section 20 of the connecting piece 14 and form tongue and groove connections.
  • radially directed ribs 24 are formed, which with the narrow the cross-section of the space enclosed by the inner wall 22.
  • the ribs 24 are circumferential and, axially offset, arranged in three stages.
  • the ribs 24 have a sawtooth-shaped cross section and are inclined towards the second end section 20.
  • the connector 14 contains an outer groove 26 in the upper section, into which an elastic sealing element 27 is locked in a form-fitting and non-positive manner, with radially outward-facing circumferential sealing collars 28 which guide and center the spark plug connector when the spark plug connector is inserted into a plug niche, which is no longer shown seal.
  • FIG. 2 shows the connector 14 in a radial section along the line II-II from FIG. 1.
  • the two-part connector 14 is formed from a first half-shell 29 and a second half-shell 31, both half-shells 29, 31 in the upper section 23 shown a plurality of longitudinal, mutually directed abutting surfaces 32, 33 arranged offset over the length of the upper section 23 as Having connecting elements acting pins 34, which can be pressed into corresponding opposite bores of the other half shell and thereby connect the half shell 29, 31, as shown.
  • the space enclosed by the inner wall 22 and having a circular cross section is narrowed by the ribs 24.
  • Figure 3 shows the connector 14 in a radial section along the line III - III of Figure 1.
  • the connector 14 is also tubular in this area, but has a larger, compared to the upper portion 23 (Figure 1) on the outer diameter of the first End section 16 ( Figure 1) on its circumference matched inner diameter.
  • the two half-shells 29, 31 have on their abutting surfaces 32, 33 protruding in pairs, opposite and axially offset, acting as connecting elements hooks 36, which, as shown, form interlocking when the two half-shells 29, 31 are joined together.
  • the form-fitting, releasable connection of the two half-shells 29, 31 can alternatively also be carried out with other connecting elements having the same effect, for example rivets. Nevertheless, the two half-shells 29, 31 can also be permanently joined together by other types of connection, such as, for example, by gluing or ultrasonic welding.
  • the first half-shell 29 is brought into comparison with the second half-shell 31.
  • the ignition cable 12, the insulating body 11 connected to it and the first end section 16 are arranged between the half-shells 29, 31 so that when the two half-shells 29, 31 are joined together, the projections 17 from the annular groove 19 and the projections 18 from the longitudinal grooves 21 form-fit the abutting surfaces 32, 33 come to lie on one another and the positive locking of the two half-shells 29, 31 to form the connecting piece 14 is carried out by means of the connecting elements 34, 36.
  • the ribs 24 arranged on the inner wall 22 are pressed into the insulation of the ignition cable 12 by the joining process of the two half-shells 29, 31 and form positive connections with the latter.
  • the ribs 24 are circumferentially attached in the inner wall 22, but could alternatively also be arranged in a circular segment in circumferential alignment or also axially offset in a circular segment.
  • the ignition cable 12 is connected to the connector 14 and this in turn to the spark plug connector via the shielding part 13 to form a firm association.
  • the previously described association could also be carried out on an unshielded spark plug connector.
  • the inventive design of the connector 14 with the ribs 24 also overcomes the disadvantage that can occur during maintenance work and when removing the spark plug connector on a non-strain-relieved ignition cable 12 with the impending loss of function of the spark plug connector.

Landscapes

  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (10)

  1. Connecteur pour bogie d'allumage avec un corps isolant (11), un fil de bougie (12) introduit dans le corps isolant (11) et une pièce de raccordement (14) en forme de douille peut être reliée au connecteur pour bougie d'allumage, et qui est construite en deux parties que l'on peut joindre, avec une première demi-coquille (29) et une seconde demi-coquille (31), dont on peut défaire la jonction à nouveau au moyen d'éléments de liaison (34, 36) disposés sur les deux demi-coquilles (29, 31), la pièce de raccordement (14) présentant une seconde section terminale (20) du côté de la bougie d'allumage servant à sa fixation sur le connecteur pour bougie d'allumage du type des liaisons rainure/ressort et une section supérieure (23) située en regard de la seconde section terminale (20) servant à recevoir une partie du fil de bougie (12), caractérisé en ce que sur la paroi intérieure (22) de la pièce de raccordement dans la section supérieure (23) sont constituées des nervures orientées radialement (24) qui pénètrent dans l'isolation du fil de la bougie (12) et forment avec celle-ci un engagement positif.
  2. Connecteur pour bougie d'allumage selon la revendication 1, caractérisé en ce que l'on forme sur des zones partielles d'une enveloppe (15) du connecteur pour bougie d'allumage au moins un appendice (17) orienté périphériquement et au moins une saillie (18) s'étendant axialement, l'appendice (17) étant entouré par une liaison par la forme par une rainure annulaire (19) et la saillie (18) par au moins une rainure longitudinale (21) sur une paroi intérieure (22) de la seconde section terminale (20) de la pièce de raccordement (14).
  3. Connecteur pour bougie d'allumage selon la revendication 1, caractérisé en ce que les nervures (24) sont inclinées en direction de la seconde section terminale (20) .
  4. Connecteur pour bougie d'allumage selon la revendication 1, 3, caractérisé en ce que les nervures (24) font tout le tour.
  5. Connecteur pour bougie d'allumage selon les revendications 1, 3, caractérisé en ce que les nervures (24) sont disposées par sections circulaires en alignement périphérique.
  6. Connecteur pour bougie d'allumage selon les revendications 1, 3, caractérisé en ce que les nervures (24) sont disposées par sections circulaires, de façon décalée axialement.
  7. Connecteur pour bougie d'allumage selon la revendication 1 et 3 à 6, caractérisé en ce que les nervures (24) ont une section transversale en forme de dents de scie.
  8. Connecteur pour bougie d'allumage selon la revendication 1 à 7, caractérisé en ce que la pièce de raccordement (14) est en une matière plastique électriquement non conductrice.
  9. Connecteur pour bougie d'allumage selon l'une des revendications précédentes, caractérisé en ce que le corps isolant (11) est entouré du côté de la bougie d'allumage sur une partie de sa longueur par une pièce de protection (13) reliée avec lui, en ce que la pièce de protection (13) présente une première section terminale (16) adjacente à la zone du corps isolant (11) qui n'est pas entourée, section terminale qui forme la partie de l'enveloppe (15) du connecteur pour bougie d'allumage, sur laquelle est formé l'un au moins des appendices (17) ou saillies (18).
  10. Connecteur pour bougie d'allumage selon la revendication 9, caractérisé en ce que la pièce de protection (19) dépasse axialement le corps isolant (19).
EP90124885A 1990-03-20 1990-12-20 Connecteur pour bougie d'allumage Expired - Lifetime EP0447659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008911 1990-03-20
DE4008911A DE4008911A1 (de) 1990-03-20 1990-03-20 Zuendkerzenstecker

Publications (2)

Publication Number Publication Date
EP0447659A1 EP0447659A1 (fr) 1991-09-25
EP0447659B1 true EP0447659B1 (fr) 1995-03-15

Family

ID=6402635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124885A Expired - Lifetime EP0447659B1 (fr) 1990-03-20 1990-12-20 Connecteur pour bougie d'allumage

Country Status (2)

Country Link
EP (1) EP0447659B1 (fr)
DE (2) DE4008911A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19851127C2 (de) * 1998-11-06 2003-08-21 Beru Ag Zündkerzensteckerstützmanschette
DE102010039424B4 (de) 2010-08-17 2023-04-27 Robert Bosch Gmbh Zündvorrichtung für eine Brennkraftmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1445681A (en) * 1972-09-29 1976-08-11 Smiths Industries Ltd Electrical connectors
US4671586A (en) * 1984-12-17 1987-06-09 General Motors Corporation Spark plug shield and boot seal assembly
US4824385A (en) * 1987-11-13 1989-04-25 Prestolite Wire Corporation Rigid sheath for a spark plug cable and its associated boot

Also Published As

Publication number Publication date
EP0447659A1 (fr) 1991-09-25
DE59008726D1 (de) 1995-04-20
DE4008911A1 (de) 1991-09-26

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