# US 9,435,314 B2 · Ignition coil assembly with extension for electrical connection of an ignition plug > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,314 B2 - Document ID: US9435314B2 - Status: Granted - Kind: B2 - Application number: 14/361,173 - Filed: 2012-11-22 - Published: 2014-11-06 - Granted: 2016-09-06 - Earliest claimed: 2011-11-29 - Assignees: Eldor Corporation S.P.A. - Applicants: Eldor Corporation S.P.A. - Inventors: Stefano Silva; Pasquale Forte - Web page: https://patentgrep.com/patent/US9435314B2 ## CPC - F02P 3/02: having inductive energy storage, e.g. arrangements of induction coils {(ignition coils structurally combined with sparking plugs F02P13/00; constructional details of ignition coils H01F38/12)} - H01T 13/05: combined with interference suppressing or shielding means - H01T 13/20: characterised by features of the electrodes or insulation - H01T 13/40: structurally combined with other devices (combined or associated with fuel injectors F02M57/06; structurally combined with other parts of internal-combustion engines F02P13/00) - H01T 13/41: with interference suppressing or shielding means - H01T 21/02: of sparking plugs - F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00) - H01T: SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H) ## Abstract An ignition coil assembly with extension for electrical connection of an ignition plug of an endothermic engine, wherein the extension (10) comprises an essentially tubular hollow body (11) having a first end area (10.1) engaged, in a detachable manner, on the free end of an ignition plug, and electrical connections (10.26, 20, 10.36), provided for the transmission of high voltage electrical energy between an electrical/electronic member of the ignition coil and the ignition plug. The electrical connections (10.26, 20, 10.36) comprise at least one filter (20) of the high frequency electromagnetic disturbances produced by the operation of the coil, wherein a winding of electrically conductive wire surrounds a central core (20.3) in ferromagnetic material dispersed in a polymer base. ## Claims ### Claim 1 An ignition coil assembly with extension for electrical connection of an ignition plug of an endothermic engine, wherein said extension (10) comprises an essentially tubular hollow body (11), which is secured to a container (C) containing the electrical/electronic means of the ignition coil for generation of a high voltage electrical energy to transmit to an ignition plug (P) for the triggering of sparks secured to the engine block of said engine, a first end area (10.1) of said tubular body (11) is engaged, in a detachable manner, on the free end of said ignition plug, and electrical connection means (10.26, 20, 10.36), provided for the transmission of the high voltage electrical energy between said electrical/electronic means of the ignition coil and said ignition plug, are contained in said tubular body (11), wherein said means for electrical connection (10.26, 20, 10.36) comprise at least one filter means (20) of the high frequency electromagnetic disturbances produced by the operation of said coil, a winding of electrically conductive wire surrounds a central core (20.3) in ferromagnetic material dispersed in a polymer base and at least one spring in good electrically conductive material (10.26, 10.36) is arranged and electrically connected between said electrically conductive winding of said at least one filter means (20) and said coil, respectively between said electrically conductive winding of said at least one filter means (20) and said plug. ### Claim 2 (depends on 1) The ignition coil assembly with extension (10) for electrical connection according to claim 1, characterized in that said at least one filter means (20) comprises a coupling means (20.1, 20.2), in good electrically conductive material, which produces the electromechanical connection of said winding of electrically conductive wire with said at least one spring in good electrically conductive material (10.26, 10.36). ### Claim 3 (depends on 2) The ignition coil assembly with extension (10) for electrical connection according to claim 2, characterized in that said coupling means (20.1, 20.2) comprises at least one cap, in good electrically conductive material, electrically connected with respect to said winding and secured at one end of said central core (20.3) of said at least one filter means (20) and electrically and mechanically connected with respect to said at least one spring (10.26, 10.36). ### Claim 4 (depends on 1) The ignition coil assembly with extension (10) for electrical connection according to claim 1, characterized in that said winding of electrically conductive wire of said at least one filter means (20) comprises a coating in semiconductive material. ### Claim 5 (depends on 1) The ignition coil assembly with extension (10) for electrical connection according to claim 1, characterized in that said polymer base of said central core (20.3) comprises a polyphenylene sulphide. ### Claim 6 (depends on 1) The ignition coil assembly with extension (10) for electrical connection according to claim 1, wherein said tubular body (11) comprises three contiguous axial areas: a first end area (10.1) having an axial through cavity (10.11), in which the free end of said ignition plug is engaged; a second end area (10.3), having an axial through cavity (10.34) and which is secured to said container containing the electrical/electronic means of said ignition coil, and an intermediate area (10.2), having an intermediate axial through cavity (10.21); and wherein said three axial cavities (10.11, 10.21, 10.34) form a single continuous axial through cavity; characterized in that said at least one filter means (20) is permanently housed in at least one of said axial cavities (10.11, 10.21, 10.34). ### Claim 7 (depends on 6) The ignition coil assembly with extension (10) for electrical connection according to claim 6, characterized in that said at least one filter means (20) is substantially rod-shaped and is permanently housed at least in the axial cavity (10.21) of said intermediate area (10.2), while each of the other two axial cavities (10.11, 10.34) of said tubular body (11) contains a respective spring (10.26, 10.36) in good electrically conductive material, said springs being connected electrically to said at least one filter means (20) and to the electrical/electronic means of said ignition coil, the one and of said ignition plug, the other. ### Claim 8 (depends on 1) The ignition coil assembly with extension (10) for electrical connection according to claim 1, characterized in that said at least one filter means (20) is co-moulded with said hollow tubular body (11) of said extension (10). ### Claim 9 (depends on 1) The ignition coil assembly with extension (10) for electrical connection according to claim 1, characterized in that said hollow tubular body (11) of said extension (10) is elastically flexible and said at least one filter means (20) is elastically flexible. ### Claim 10 An ignition coil assembly with extension for electrical connection of an ignition plug of an endothermic engine, wherein said extension (10) comprises an essentially tubular hollow body (11), which is secured to a container (C) containing the electrical/electronic means of the ignition coil for generation of a high voltage electrical energy to transmit to an ignition plug (P) for the triggering of sparks secured to the engine block of said engine, a first end area (10.1) of said tubular body (11) is engaged, in a detachable manner, on the free end of said ignition plug, and electrical connection means (10.26, 20, 10.36), provided for the transmission of the high voltage electrical energy between said electrical/electronic means of the ignition coil and said ignition plug, are contained in said tubular body (11), wherein said means for electrical connection (10.26, 20, 10.36) comprise at least one filter means (20) of the high frequency electromagnetic disturbances produced by the operation of said coil, a winding of electrically conductive wire surrounds a central core (20.3) in ferromagnetic material dispersed in a polymer base and at least one spring in good electrically conductive material (10.26, 10.36) is arranged and said tubular body (11) comprises three contiguous axial areas: a first end area (10.1) having an axial through cavity (10.11), in which the free end of said ignition plug is engaged; a second end area (10.3), having an axial through cavity (10.34) and which is secured to said container containing the electrical/electronic means of said ignition coil, and an intermediate area (10.2), having an intermediate axial through cavity (10.21); wherein said three axial cavities (10.11, 10.21, 10.34) form a single continuous axial through cavity and said at least one filter means (20) is permanently housed in at least one of said axial cavities (10.11, 10.21, 10.34). ### Claim 11 An ignition coil assembly with extension for electrical connection of an ignition plug of an endothermic engine, wherein said extension (10) comprises an essentially tubular hollow body (11), which is secured to a container (C) containing the electrical/electronic means of the ignition coil for generation of a high voltage electrical energy to transmit to an ignition plug (P) for the triggering of sparks secured to the engine block of said engine, a first end area (10.1) of said tubular body (11) is engaged, in a detachable manner, on the free end of said ignition plug, and electrical connection means (10.26, 20, 10.36), provided for the transmission of the high voltage electrical energy between said electrical/electronic means of the ignition coil and said ignition plug, are contained in said tubular body (11), wherein said means for electrical connection (10.26, 20, 10.36) comprise at least one filter means (20) of the high frequency electromagnetic disturbances produced by the operation of said coil, a winding of electrically conductive wire surrounds a central core (20.3) in ferromagnetic material dispersed in a polymer base and at least one spring in good electrically conductive material (10.26, 10.36) is arranged and said hollow tubular body (11) of said extension (10) is elastically flexible and said at least one filter means (20) is elastically flexible.