GB2266812A - Cable grip in sparking-plug connector for internal combustion engines - Google Patents
Cable grip in sparking-plug connector for internal combustion engines Download PDFInfo
- Publication number
- GB2266812A GB2266812A GB9308132A GB9308132A GB2266812A GB 2266812 A GB2266812 A GB 2266812A GB 9308132 A GB9308132 A GB 9308132A GB 9308132 A GB9308132 A GB 9308132A GB 2266812 A GB2266812 A GB 2266812A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sparking
- plug
- connector
- plug connector
- insulating part
- 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 description 2
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims abstract description 3
- 238000005728 strengthening Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/20—Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable
-
- 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
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2101/00—One pole
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A sparking-plug connector 4 in plastics insulating material, which can be pushed onto a sparking plug 6 arranged in the recessed pocket 1.1 of an engine block 1, has a hollow cylindrical connector stem 4.1 which is provided with a radially protruding mushroom-shaped extension 4.1.1 at its upper end and an open slot 4.1.2 in the mushroom- shaped extension 4.1.1 extending radially outwards from the hollow 4.1.0 of the connector stem. The extension 4.1.1 carries clip lugs 4.1.4 on the slot walls 4.1.3 so as to grip an ignition cable 5. <IMAGE>
Description
2266812 A sparking-plug connector for internal combustion engines The
invention relates to a sparking-plug connector which is adapted to be pushed onto a sparking plug arranged in the recessed pocket of an engine block.
A sparking-plug connector of this type is already known (DE 37 27 458 A1), an ignition coil being carried at the upper end of its hollow cylindrical connector stem by means of a cast-on connecting piece and by this means forming an ignition unit. Near its upper end, the insulating body of the ignition coil has depressions which make it possible to push the complete ignition unit in a simple manner onto, and off, a sparking plug.
Sparking-plug connectors are also known which have either an axial ignition cable outlet or an angular outlet in the form of an integrated angle piece for the ignition cable leading to the ignition coil.
In the case of the long sparking-plug connectors, problems fundamentally exist particularly during dismantling when, after a long engine operating period and high temperatures at the plug, the elastic (rubber) insulating part enclosing the necked-down part of the plug gets stuck to the latter and can only be withdrawn with a large expenditure of force, while rotating and loosening this composite, usually with the aid of auxiliary tools because, due to a lack of accessibility, it is impossible to release the insulating part from the necked-down part of the plug directly. Damage to the sparking-plucl connector with the consequence of a reduction in the high-tension resistance and the operational reliability cannot, therefore, be excluded.
It is also impossible to deal with this problem by means of an ignition coil configured with a handling feature in accordance with the prior art referred to above because, in that case, given the problems described which occur during dismantling, the ignition coil is released from the
2 sparking-plug connector first before the latter is released from the necked-down part of the plug.
In the case of sparking-plug connectors with integrated angle piece for the ignition cable outlet, on the other hand, the problems described can, under certain circumstances, be taken into account if the angle piece is configured sufficiently strongly for it to be used as a handling feature. These complicated sparking-plug connectors are not, however, universally applicable because sparking-plug connectors with axial and angular cable outlet, or only those having axial cable outlet, can be necessary on the same engine.
The present invention seeks therefore further to improve a sparking-plug connector of the generic type with respect to its assembly/dismantling and its usability.
According to the present invention there is provided a sparking-plug connector in a plastics insulating material, which connector is adapted to be pushed onto a sparking plug arranged in the recessed pocket of an engine block, and has an elastic insulating part adapted to enclose the neckeddown part of the sparking plug, which sparking-plug connector has a hollow cylindrical connector stem at its end facing away from the sparking plug, wherein the connector stem is provided with a radially protruding mushroom-shaped extension at its upper end and an open slot extending radially outwards from the hole of the connector stem in the mushroom-shaped extension, the clear width of the slot corresponding at least to the diameter of a connectable ignition cable, and the extension carries clip lugs on its walls at the sides of the slot, by means of which clip lugs a connectable ignition cable can be clipped in and held down in the slot.
Because the connector stem of the sparking-plug connector is provided with a radially protruding mushroomshaped extension at its upper end, this extension is suitable as a handling feature both for use to facilitate assembly when pushing it on and, because of the larger 3 radial extent compared with the connector stem, on the one hand, to permit easier rotation to release the composite made up of the necked- down part of the plug and the insulating part and, on the other hand, to permit the exertion of a sufficient extraction force. In addition, however, the extension also fulfils the function of achieving not only an axial but also an angular ignition cable outlet on the sparking-plug connector so that the sparking-plug connector can be universally employed.
Preferably, the hollow cylindrical connector stem has strengthening ridges on its outer periphery which extend from the extension as far as and into the insulating part carried by it and also act to secure this insulating part against rotation.
The insulating part may be provided with support elements supporting it relative to the pocket and configured on its outer periphery in the sparking plug contact region, which may be in a region located at an axial distance above this contact region.
The insulating part may have strengthening ribs which extend in the axial direction on its outer periphery and/or is configured as a polygon, and may also have an electrically conducting coating on its externally located surface at least in partial regions. A protective cap may be applied to the upper end of the connector stem.
An embodiment of the invention is represented in the drawing and is described in more detail below. In- the drawing:
Fig. 1 shows the arrangement of a sparking plug connector in an engine, in diagrammatic representation, Fig. 2a shows the sparking-plug connector configured according to the invention, in side view, Fig. 2b shows it in front view and Fig. 2c shows a plan view onto the same.
As may be seen from Fig. 1, pockets 1.1 are configured in an engine block (cylinder head) 1 corresponding to the number of cylinders; a sparking plug can be 4 screwed into the lower end of the pocket. The engine block 1 is closed towards the top by a valve cover (cylinder head cover) 2 with a passage 2. 1 which is in turn closed by a cover 3. Both the pocket 1.1 and the passage 2.1 are used for accommodating the sparking-plug connector 4, whose, ignition cable 5 leads from it to an ignition coil likewise arranged in the passage 2.1.
More precise details are given by Fig. 2, which shows a sparking plug 6 screwed into the lower end of the pocket 1.1 in the engine block 1, the sparking-plug connector 4 being pushed onto this sparking plug 6. Essentially, this sparking-plug connector 4 has a hollow cylindrical connector stem 4.1 at one of its ends with an ignition cable contact part 4.0.1 located at the bottom of it, which contact part 4.0.1 is in electrically conducting connection with a sparking plug contact part 4.0. 2 in a stepped hole at the other end, and has an elastic insulating part 4.2 consisting of plastic or rubber on the other end, this insulating part 4.2 enclosing the necked-down part of the plug 6.1 of the sparking plug 6.
At the upper end of the connector stem 4. 1, the latter has a radially protruding mushroom-shaped extension 4. 1. 1 with, for example, a round, hexagonal or oval surf ace, the extension being dimensioned in such a way that it can be used as a handling f eature. In the extension 4. 1. 1, an open slot 4.1.2 is configured on one side extending radially outwards from the hole 4.1.0 of the connector stem 4.1 part of which slot is also cut from the wall of the connector stem - and the clear width 4.1.2.1 of the slot corresponds at least to the diameter of a connectable ignition cable 5. The extension carries clip lugs 4.1.4 on its walls at the sides of the slot, by means of which clip lugs the connectable ignition cable.5 can be clipped in from the top and held down in the slot 4.1.2. This creates the possibility of leading out the ignition cable 5 from the connector stem 4.1 both in the axial direction and in the angled direction; the sparking-plug connector can therefore be universally employed. Furthermore, the large-area extension 4.1.1 makes it easier to push the sparking-plug connector onto the sparking plug and, because of the larger diameter of the extension and the extension acting as a handling feature, it is also easier to extract and rotate the sparking-plug connector to loosen the connector/plug composite. The connector stem 4.1 and the extension 4.1.1 can, in addition, carry a protective cap 7, by means of which sealing against environmental effects is also achieved.
Both for strengthening purposes and to secure the connector stem 4.1 against rotation in the insulating part 4.2, the connector stem 4.1 is provided on its external periphery with strengthening ridges 4.1.5 which extend from the extension 4.1.1 as far as and into the insulating part 4. 2 carried by the connector stem 4.1, which strengthening ridges 4.1.5 can, for example, be formed by a polygonal outer contour of the connector stem or by ribs.
Furthermore, the insulating part 4.2 is also provided with strengthening ribs 4.2.1 and 4.2.2 which extend in the axial direction on its outer periphery or is configured as a hexagon; the strengthening ribs 4.2.2 are arranged in the region of the necked-down part of the plug 6.1, whereas the strengthening ribs 4.2.1 are arranged in the upper half of the insulating part 4.2. The insulating part 4.2 is provided with support elements 4.2.3 and 4.2.4 configured on its outer periphery both in the region of the sparking plug contact part 4.0.2 and, in particular, in a region located at an axial distance above it. These support elements are configured, for example, as knobs or as an annular bead which comes into contact with the wall of the plug pocket 1.1. By this means, the sparkingplug connector 4 obtains, on the one hand, a stable 2-point support in the axial direction in the pocket 1.1 and, on the other, the support elements 4.2.3 act as insertion centering when the sparking-plug connector 4 is inserted into the pocket 1.1 and the support elements 4.2. 3 and 4.2.4 act as centering 6 and guide aids when the sparking-plug connector is being pushed on. An unloaded, operationally secure contact between the sparking-plug connector and the sparking plug is ensured during the accelerations occurring in practical use, particularly because of the stable 2-point support.
For optimum interference suppression - reduction of the electromagnetic radiation over the complete radio frequency range - the insulating part 4. 2 is additionally provided with an electrically conducting coating 4.2.6 on its externally located surface 4.2.5 at least in partial regions (region of the sparking plug 6), it being possible to integrate the suppressor resistance into the insulating part.
7
Claims (1)
- Claims1. A sparking-plug connector in a plastics insulating material, which connector is adapted to be pushed onto a sparking plug arranged in the recessed pocket of an engine block, and has an elastic insulating part adapted to enclose the necked-down part of the sparking plug, which sparkingplug connector has a hollow cylindrical connector stem at its end facing away from the sparking plug, wherein the connector stem is provided with a radially protruding mushroom-shaped extension at its upper end and an open slot extending radially outwards from the hole of the connector stem in the mushroom-shaped extension, the clear width of the slot corresponding at least to the diameter of a connectable ignition cable, and the extension carries clip lugs on its walls at the sides of the slot, by means of which clip lugs a connectable ignition cable can be clipped in and held down in the slot.2. A sparking-plug connector according to Claim 1, wherein the hollow cylindrical connector stem has siiengthening ridges on its outer periphery which extend from the extension as far as and into the insulating part carried by it and also act to secure this insulating part against rotation.3. A sparking-plug connector according to Claim 1 or 2, wherein the insulating part is provided with support elements supporting it relative to the pocket and configured on its outer periphery in the sparking plug contact region.4. A sparking-plug connector according to Claim 3, wherein the support elements are in a region located at an axial distance above this contact region.8 5. A sparking-plug connector according to Claim 1, 3 or 4, wherein the insulating part has strengthening ribs which extend in the axial direction on its outer periphery and/or is configured as a polygon.6. A sparking-plug connector according to any one of Claims 1 to 5, wherein the insulating part has an electrically conducting coating on its externally located surface at least in partial regions.7. A sparking-plug connector according to any one of Claims 1 to 6, wherein a protective cap is applied to the upper end of the connector stem.8. A sparking-plug connector substantially as described herein with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4214816A DE4214816C1 (en) | 1992-05-05 | 1992-05-05 | Spark plug connector for an internal combustion engine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9308132D0 GB9308132D0 (en) | 1993-06-02 |
| GB2266812A true GB2266812A (en) | 1993-11-10 |
| GB2266812B GB2266812B (en) | 1996-01-03 |
Family
ID=6458202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9308132A Expired - Fee Related GB2266812B (en) | 1992-05-05 | 1993-04-20 | A sparking-plug connector for internal combustion engines |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE4214816C1 (en) |
| FR (1) | FR2691018B1 (en) |
| GB (1) | GB2266812B (en) |
| IT (1) | IT1261459B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9306765U1 (en) * | 1992-10-02 | 1993-08-12 | Beru AG, 71636 Ludwigsburg | Spark plug connector |
| DE4405989C2 (en) * | 1994-02-24 | 2000-07-06 | Opel Adam Ag | Ignition unit for gasoline engines |
| DE4442634B4 (en) * | 1994-11-30 | 2007-08-30 | Bayerische Motoren Werke Ag | Device for fastening a Einzelspulenzündsystems with the cylinder head of an internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2212675A (en) * | 1987-11-13 | 1989-07-26 | Prestolite Wire Corp | Rigid sheath for a spark plug cable and its associated boot |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8016486U1 (en) * | 1980-06-21 | 1983-06-09 | Robert Bosch Gmbh, 7000 Stuttgart | EMERGENCY PLUG |
| US4770642A (en) * | 1983-08-29 | 1988-09-13 | Hoose James S Van | Ignition cable connector |
| JPS61204386U (en) * | 1985-06-12 | 1986-12-23 | ||
| FR2596589B1 (en) * | 1986-03-25 | 1988-07-08 | Electricfil | INSULATION CAP FOR INTERNAL COMBUSTION ENGINE SPARK PLUG |
| DE3727458A1 (en) * | 1987-08-18 | 1989-03-02 | Bayerische Motoren Werke Ag | IGNITION UNIT FOR COMBUSTION ENGINES |
| US4810198A (en) * | 1987-11-13 | 1989-03-07 | Prestolite Wire Corporation | Reinforced boot for spark plug cables |
| JPH07711Y2 (en) * | 1989-03-03 | 1995-01-11 | 日産自動車株式会社 | Plug socket |
| US4906202A (en) * | 1989-03-13 | 1990-03-06 | General Motors Corporation | Deep well ignition cable terminal assembly |
| JPH0384558U (en) * | 1989-12-20 | 1991-08-27 |
-
1992
- 1992-05-05 DE DE4214816A patent/DE4214816C1/en not_active Expired - Fee Related
-
1993
- 1993-04-20 GB GB9308132A patent/GB2266812B/en not_active Expired - Fee Related
- 1993-04-28 IT ITRM930267A patent/IT1261459B/en active IP Right Grant
- 1993-05-03 FR FR9305227A patent/FR2691018B1/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2212675A (en) * | 1987-11-13 | 1989-07-26 | Prestolite Wire Corp | Rigid sheath for a spark plug cable and its associated boot |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2266812B (en) | 1996-01-03 |
| FR2691018B1 (en) | 1994-11-25 |
| FR2691018A1 (en) | 1993-11-12 |
| ITRM930267A1 (en) | 1994-10-28 |
| DE4214816C1 (en) | 1993-10-21 |
| IT1261459B (en) | 1996-05-23 |
| ITRM930267A0 (en) | 1993-04-28 |
| GB9308132D0 (en) | 1993-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20010420 |