WO2010149194A1 - Extension for an ignition coil for an engine - Google Patents
Extension for an ignition coil for an engine Download PDFInfo
- Publication number
- WO2010149194A1 WO2010149194A1 PCT/EP2009/008166 EP2009008166W WO2010149194A1 WO 2010149194 A1 WO2010149194 A1 WO 2010149194A1 EP 2009008166 W EP2009008166 W EP 2009008166W WO 2010149194 A1 WO2010149194 A1 WO 2010149194A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- extension
- plastic
- coil according
- hollow element
- internal combustion
- Prior art date
Links
- 239000004033 plastic Substances 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 238000005253 cladding Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000010348 incorporation Methods 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 abstract description 4
- 239000004945 silicone rubber Substances 0.000 abstract description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 1
- 238000004496 double electron--electron resonance spectroscopy Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
-
- 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
- F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/12—Ignition, e.g. for IC engines
Definitions
- the present invention relates to an extension for an ignition coil for an internal combustion engine of a motor vehicle, suitable for resisting high thermal and electrical stresses to which said type of extension is subjected.
- the known extensions are made of rigid plastic or silicone rubber.
- the known extensions have the disadvantage of not sufficiently resisting the combination of high thermal and electrical stresses to which said extensions are subjected.
- extensions in silicone rubber do not have sufficient strength
- the present invention advantageously resolves the drawbacks of the known extensions with an extension, preferably of substantially cylindrical shape, externally in silicone rubber and internally in rigid plastic.
- Said combination advantageously combines the characteristics of the silicone material for resisting the corona effect and the discharges due to high voltage, and the mechanical characteristics of the plastic which allow a mechanical rigidity which ensures dimensional stability and electrical contact.
- Said combination also has the advantage of allowing the portions of the coil designated head rubber and sparkplug rubber to be moulded with the silicone part of the extension which is the subject of the present invention.
- a further advantage of the present invention is the possibility of incorporating circuit elements into the plastic, such as the diode and/or the resistor, in order to be positioned on the inner surface of the extension by virtue of the rigidity of the plastic of which the inner part of said extension is made.
- Figure i shows a perspective view of the extension (l) which is the subject of the present invention of a substantially cylindrical shape.
- Figure 2 shows a perspective view of the extension (l) which is the subject of the present invention, with a hollow element (2) in plastic and a cladding (3) in silicone of said hollow element (2). Said figure also shows a portion (a) suitable for performing the function of coupling element between the coil and the head of an internal combustion engine of motor vehicles (so-called head rubber) and a portion (b) suitable for performing the function of coupling element with the sparkplug of an internal combustion engine of motor vehicles (so-called sparkplug rubber).
- FIG. 3 shows a perspective view of the extension (1) which is the subject of the present invention, with a diode (4) and a resistor (5) incorporated in plastic and located inside said extension (1), mainly inside said hollow element (2). Said incorporation of the diode (4) and/or the resistor (5) in plastic together and/or with the hollow element (2) is preferably performed by co-moulding.
- the embodiment of the above illustrated drawings is a non limitative example.
- the various parts which make up the extension which is the subject of the present invention can all be co-moulded together, but also only two components of said extension - hollow element (2) in plastic, cladding (3) in silicone, diode (4), resistor (5) - can be co-moulded together.
- MODE FOR CARRYING OUT THE PRESENT INVENTION The extension which is the subject of the present invention can be used for ignition coils on any internal combustion engine of any motor vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The present invention relates to an extension for an ignition coil for an internal combustion engine of a motor vehicle, suitable for resisting high thermal and electrical stresses. Said extension has a substantially cylindrical shape. It is made externally of silicone rubber and internally of rigid plastic.
Description
D E S C R I P T I O N
Annexed to the INDUSTRIAL INVENTION Patent Application entitled: EXTENSION FOR AN IGNITION COIL FOR AN ENGINE In the name of: ELDOR CORPORATION S.p.A., domiciled in ORSENIGO 5 (Como), in Via Plinio n. 18.
Designated Inventors: Pasquale Forte, Amedeo Colombotto Representative: Attorney Raffaello Nemni (Bar of Milan), professionally domiciled in Milan, Via San Marco, 23. Filed on No.
^ Q # # * *
OBJECT OF THE INVENTION
The present invention relates to an extension for an ignition coil for an internal combustion engine of a motor vehicle, suitable for resisting high thermal and electrical stresses to which said type of extension is subjected.
15 STATE OF THE ART
It is well-known that the purpose of the extension of a coil for internal combustion engines for motor vehicles is to conduct the high voltage generated by the electromagnetic circuit to the sparkplug fitted in the engine well.
20 The known extensions are made of rigid plastic or silicone rubber. The known extensions have the disadvantage of not sufficiently resisting the combination of high thermal and electrical stresses to which said extensions are subjected. In particular, extensions in silicone rubber do not have sufficient
25 mechanical rigidity to make them suitable to resist the above-mentioned
stresses, and because of their flexibility they do not guarantee a stable contact, while those in plastic are too rigid from a mechanical point of view and have poor resistance to the corona effect and the discharges due to high voltage. DISCLOSURE OF THE INVENTION
The present invention advantageously resolves the drawbacks of the known extensions with an extension, preferably of substantially cylindrical shape, externally in silicone rubber and internally in rigid plastic. Said combination advantageously combines the characteristics of the silicone material for resisting the corona effect and the discharges due to high voltage, and the mechanical characteristics of the plastic which allow a mechanical rigidity which ensures dimensional stability and electrical contact. Said combination also has the advantage of allowing the portions of the coil designated head rubber and sparkplug rubber to be moulded with the silicone part of the extension which is the subject of the present invention. A further advantage of the present invention is the possibility of incorporating circuit elements into the plastic, such as the diode and/or the resistor, in order to be positioned on the inner surface of the extension by virtue of the rigidity of the plastic of which the inner part of said extension is made.
The processes of construction of the geometry of the parts which make up the extension and the circuit elements which are the subject of the present invention can be various, but the process of co-moulding is preferable, it having been possible to observe experimentally that with this process it is
possible to obtain an optimal coupling between the silicone and the plastic which make up the extension which is the subject of the present invention. Said process of co-moulding with plastic has also shown itself to be advantageous for the circuit elements coupled together and/or to the hollow element of said extension.
DESCRIPTION OF THE DRAWINGS
Figure i shows a perspective view of the extension (l) which is the subject of the present invention of a substantially cylindrical shape.
Figure 2 shows a perspective view of the extension (l) which is the subject of the present invention, with a hollow element (2) in plastic and a cladding (3) in silicone of said hollow element (2). Said figure also shows a portion (a) suitable for performing the function of coupling element between the coil and the head of an internal combustion engine of motor vehicles (so-called head rubber) and a portion (b) suitable for performing the function of coupling element with the sparkplug of an internal combustion engine of motor vehicles (so-called sparkplug rubber).
The hollow element (2) and the cladding (3) in silicone are preferably coupled together by co-moulding. Figure 3 shows a perspective view of the extension (1) which is the subject of the present invention, with a diode (4) and a resistor (5) incorporated in plastic and located inside said extension (1), mainly inside said hollow element (2). Said incorporation of the diode (4) and/or the resistor (5) in plastic together and/or with the hollow element (2) is preferably performed by co-moulding. The embodiment of the above illustrated drawings is a non limitative
example. The various parts which make up the extension which is the subject of the present invention can all be co-moulded together, but also only two components of said extension - hollow element (2) in plastic, cladding (3) in silicone, diode (4), resistor (5) - can be co-moulded together. MODE FOR CARRYING OUT THE PRESENT INVENTION The extension which is the subject of the present invention can be used for ignition coils on any internal combustion engine of any motor vehicle.
Claims
1. Ignition coil, in particular for an internal combustion engine of a motor vehicle, comprising an extension (i) characterised in that of providing a hollow element (2) in plastic and a cladding (3) in silicone of said hollow element (2) ;
2. Coil according to claim 1, characterised in that the hollow element (2) is of a substantially cylindrical shape;
3. Coil according to claim 1, characterised in that the cladding (3) in silicone is co-moulded on the hollow element (2);
4. Coil according to claim 1, characterised in that the extension (1) has a portion (a) suitable for performing the function of coupling element between the coil and the head of an internal combustion engine of motor vehicles and a portion (b) suitable for performing the function of coupling element with the sparkplug of an internal combustion engine of motor vehicles;
5. Coil according to claim 1, characterised in that of comprising a diode (4) and/or a resistor (5) incorporated in plastic and located inside said extension (1);
6. Coil according to claims 1 and 5, characterised in that the incorporation of the diode (4) and/ or the resistor (5) in plastic is performed by co-moulding;
7. Coil according to claims 1 and 5, characterised in that the diode (4) and/or the resistor (5) is co-moulded with the hollow element (2);
8. Coil according to claims 1, 3 and 5, characterised in that of comprising the diode (4) and/or the resistor (5) co-moulded with the extension (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI20091096 | 2009-06-22 | ||
| ITMI2009A001096 | 2009-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010149194A1 true WO2010149194A1 (en) | 2010-12-29 |
Family
ID=41479080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2009/008166 WO2010149194A1 (en) | 2009-06-22 | 2009-11-17 | Extension for an ignition coil for an engine |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2010149194A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014203175A1 (en) | 2013-06-19 | 2014-12-24 | Eldor Corporation S.P.A. | Ignition device for internal combustion engines |
| US9435314B2 (en) | 2011-11-29 | 2016-09-06 | Eldor Corporation S.P.A. | Ignition coil assembly with extension for electrical connection of an ignition plug |
| US20190043665A1 (en) * | 2016-03-02 | 2019-02-07 | Eldor Corporation S.P.A. | Silicone extension for an ignition coil for internal combustion engines, ignition coil comprising said silicone extension and method of assembly for said ignition coil |
| US10608415B2 (en) | 2017-11-17 | 2020-03-31 | Borgwarner Ludwigsburg Gmbh | Connector plug for connecting an ignition coil to a spark plug |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09246070A (en) * | 1996-03-01 | 1997-09-19 | Hanshin Electric Co Ltd | Ignition coil of internal combustion engine |
| FR2783880A1 (en) * | 1998-09-28 | 2000-03-31 | Sagem | IGNITION ASSEMBLY FOR AN INTERNAL COMBUSTION ENGINE |
| EP1225606A2 (en) * | 1997-05-23 | 2002-07-24 | Hitachi, Ltd. | Ignition coil for use in engine and engine having plastic cylinder head cover |
| US6668810B1 (en) * | 2002-11-06 | 2003-12-30 | Visteon Global Technologies, Inc. | Ignition coil assembly with spark plug connector |
-
2009
- 2009-11-17 WO PCT/EP2009/008166 patent/WO2010149194A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09246070A (en) * | 1996-03-01 | 1997-09-19 | Hanshin Electric Co Ltd | Ignition coil of internal combustion engine |
| EP1225606A2 (en) * | 1997-05-23 | 2002-07-24 | Hitachi, Ltd. | Ignition coil for use in engine and engine having plastic cylinder head cover |
| FR2783880A1 (en) * | 1998-09-28 | 2000-03-31 | Sagem | IGNITION ASSEMBLY FOR AN INTERNAL COMBUSTION ENGINE |
| US6668810B1 (en) * | 2002-11-06 | 2003-12-30 | Visteon Global Technologies, Inc. | Ignition coil assembly with spark plug connector |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9435314B2 (en) | 2011-11-29 | 2016-09-06 | Eldor Corporation S.P.A. | Ignition coil assembly with extension for electrical connection of an ignition plug |
| WO2014203175A1 (en) | 2013-06-19 | 2014-12-24 | Eldor Corporation S.P.A. | Ignition device for internal combustion engines |
| US20190043665A1 (en) * | 2016-03-02 | 2019-02-07 | Eldor Corporation S.P.A. | Silicone extension for an ignition coil for internal combustion engines, ignition coil comprising said silicone extension and method of assembly for said ignition coil |
| US10608415B2 (en) | 2017-11-17 | 2020-03-31 | Borgwarner Ludwigsburg Gmbh | Connector plug for connecting an ignition coil to a spark plug |
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