EP0470938B1 - Verbindung von Zündespule mit einer Zündkerze für innere Brennkraftmaschine mit gesteuerter Zündung - Google Patents
Verbindung von Zündespule mit einer Zündkerze für innere Brennkraftmaschine mit gesteuerter Zündung Download PDFInfo
- Publication number
- EP0470938B1 EP0470938B1 EP91830336A EP91830336A EP0470938B1 EP 0470938 B1 EP0470938 B1 EP 0470938B1 EP 91830336 A EP91830336 A EP 91830336A EP 91830336 A EP91830336 A EP 91830336A EP 0470938 B1 EP0470938 B1 EP 0470938B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- tubular element
- recess
- skirt
- connector
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 8
- 239000004020 conductor Substances 0.000 claims description 5
- 239000012777 electrically insulating material Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 229920000136 polysorbate Polymers 0.000 claims 1
- 239000011810 insulating material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
-
- 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
-
- 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
- H01T13/06—Covers forming a part of the plug and protecting it against adverse environment
Definitions
- the present invention relates to an internal combustion engine with an ignition system including at least one "plug-top" ignition coil which is connected by a connector to an associated spark plug mounted in a recess or seat in the engine, the connector comprising:
- US-A-1 956 805 discloses an engine having a cylinder head provided with a pocket or seat in which a spark plug is mounted.
- said pocket or seat is provided with a protective arrangement including a first and a second cover member made of bakelite or other insulating material.
- the first cover member is fitted into the mouth portion of the spark plug pocket with the interposition of a sealing ring, and has an upper tubular portion which surrounds with radial play a conductive adapter coupled to the plug.
- the adapter carries the second cover member, which has a skirt which extends downwardly, around the upper portion of the first cover member.
- an integrated coil ignition unit associated with the engine includes a plurality of ignition coils or transformers in a single support casing.
- This integrated unit has a plurality of outputs, each of which is connected to an associated spark plug by means of a respective connector.
- a connector including a tubular element of insulating material, one end of which has an integral tubular skirt with external peripheral projections which are intended to be force-fitted, that is, fitted with interference, in the mouth of the recess in which the plug is housed, has recently been proposed for interconnecting the output of the "plug-top" ignition coil and the associated spark plug.
- This solution has the disadvantage that a certain amount of force is needed to insert the connector into the recess and to remove it therefrom, for example, when a plug has to be replaced.
- a further disadvantage of the prior art described above lies in the fact that the dimensional tolerances of the recesses in the engine in which the plugs are housed are quite critical.
- the object of the present invention is to identify solutions which solve the problems of the prior art described above.
- an internal combustion engine for example, a four-cylinder, four-stroke engine
- An integrated coil ignition unit is mounted on the head 2 of the engine.
- This unit is, for example, of the type described in European patent application No. 91830163.1 and comprises a support casing which houses two ignition transformers, each for connection to a pair of spark plugs of the engine.
- the integrated unit 3 has four high-tension output terminals, indicated a, b, and d, each of which is connected electrically to a respective spark plug in the manner which will be described below.
- FIG. 2 shows the high-tension output a of the integrated unit 3: this output includes an insulating element 5, the end of which has a recess 6 with an output terminal 7 of electrically-conductive material fixed to its inner end.
- Recesses or seats 8 are formed in the engine 1 in known manner ( Figures 2 to 4) and a respective spark plug SP is mounted in the bottom of each.
- each plug SP is connected electrically to the terminal 7 of a respective output of the integrated unit 3 by means of a connector, generally indicated 10.
- This connector comprises a tubular element 11 of electrically-insulating material, for example, elastomeric material, having a first end 11 a inserted in the recess 8 in which the plug SP is mounted and fitted onto the end of the plug.
- the tubular element 11 has a second end, indicated 11 b, which projects from the recess 8 and is connected to an output terminal 5 of the integrated unit 3.
- a conductor member 12 is disposed in the tubular insulating element 11 and, in the embodiment illustrated, is constituted by a helical metal spring. This member forms an electrically-conductive path between an output terminal 7 of the integrated unit 3 and the associated plug SP.
- each recess 8 has an annular, collar-like raised portion 13.
- each tubular element 11 has a flexible, integral, bell-like external skirt 14 facing its other end 11 a.
- the edge portion of the skirt 14 bears against the surface of the engine surrounding the collar 13 and is resiliently deformed, as can be seen in Figure 2.
- transverse dimensions of the tubular element 11 of each connector are such that it extends in the respective recess 8 in the engine with radial clearance.
- each tubular element 11 has a substantially conical, outwardly-divergent surface for facilitating the fitting of the tubular element 11 onto the end of the associated plug SP.
- each tubular element 11 has a tapered, preferably conical, external end surface for facilitating the insertion and centering of the tubular element 11 in a corresponding recess 8 in the engine.
- the skirts 14 of the connectors and the associated raised collars 13 surrounding the mouths of the recesses 8 in the engine prevent the ingress of water, dust or dirt to the recesses.
- Small breather holes may be formed in the skirt 14 to allow the passage of air between the interiors of the recesses 8 and the atmosphere surrounding the engine.
- At least one small breather channel or groove such as that indicated 20 in Figure 3, may be formed for the same purpose in the internal surface of the skirt 14, starting from its edge.
- At least one breather passage 21 for each recess 8 is formed in the engine head 2, also for the same purpose, and extends between the recess 8 and a portion of the surface of the engine outside the region against which the skirt 14 of the associated connector 10 bears in the mounted condition.
- the breather passage 21 may be formed, for example, simply by milling.
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)
- Spark Plugs (AREA)
Claims (13)
dadurch gekennzeichnet, daß:
dadurch gekennzeichnet, daß das zweite Ende (11 b) des röhrenförmigen Elementes (11) einen integralen, glockenartigen äußeren Rand (14) aufweist, der dem anderen Ende (11a) des röhrenförmigen Elementes (11) zugewandt ist, und dessen Kantenabschnitt im montierten Zustand an der Fläche des Motors (1, 2) anliegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT6763090 | 1990-08-08 | ||
IT67630A IT1240539B (it) | 1990-08-08 | 1990-08-08 | Motore a combustione interna ad accensione comandata e dispositivo di interconnessione fra una bobina di accensione ed una candela per tale motore. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0470938A1 EP0470938A1 (de) | 1992-02-12 |
EP0470938B1 true EP0470938B1 (de) | 1995-11-29 |
Family
ID=11304052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91830336A Expired - Lifetime EP0470938B1 (de) | 1990-08-08 | 1991-07-30 | Verbindung von Zündespule mit einer Zündkerze für innere Brennkraftmaschine mit gesteuerter Zündung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0470938B1 (de) |
DE (1) | DE69114944T2 (de) |
ES (1) | ES2082181T3 (de) |
IT (1) | IT1240539B (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4244883C2 (de) * | 1992-07-14 | 1998-07-09 | Audi Ag | Zündkerzenstecker |
JPH0729822U (ja) * | 1993-11-11 | 1995-06-02 | 住友電装株式会社 | 内燃機関の点火装置 |
DE29612481U1 (de) * | 1996-07-18 | 1997-11-13 | Robert Bosch Gmbh, 70469 Stuttgart | Zündsystem für eine Brennkraftmaschine |
DE19702696A1 (de) * | 1997-01-25 | 1998-08-06 | Telefunken Microelectron | Zündschiene mit abgedichteten, beweglichen Verbindungen |
JP4793857B2 (ja) * | 2005-12-27 | 2011-10-12 | 本田技研工業株式会社 | 自動二輪車のプラグキャップ取付構造体 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1689690A (en) * | 1927-02-24 | 1928-10-30 | Charles J Blue | Attachment for spark plugs |
US1956805A (en) * | 1932-06-08 | 1934-05-01 | Continental Motors Corp | Engine |
US2686511A (en) * | 1951-12-20 | 1954-08-17 | Chrysler Corp | Spark plug and ignition lead wire protective system |
US3110297A (en) * | 1962-10-10 | 1963-11-12 | Worthington Corp | Internal combustion engine |
-
1990
- 1990-08-08 IT IT67630A patent/IT1240539B/it active IP Right Grant
-
1991
- 1991-07-30 EP EP91830336A patent/EP0470938B1/de not_active Expired - Lifetime
- 1991-07-30 DE DE69114944T patent/DE69114944T2/de not_active Expired - Fee Related
- 1991-07-30 ES ES91830336T patent/ES2082181T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2082181T3 (es) | 1996-03-16 |
DE69114944D1 (de) | 1996-01-11 |
IT9067630A1 (it) | 1992-02-08 |
IT1240539B (it) | 1993-12-17 |
DE69114944T2 (de) | 1996-06-20 |
EP0470938A1 (de) | 1992-02-12 |
IT9067630A0 (it) | 1990-08-08 |
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