High voltage contact for an ignition coil

Patent metadata

Field	Value
Publication number	US-10622140-B2
Application number	US-201715654368-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Jul 21, 2016
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

Described is an ignition coil comprising a housing, in which a transformer is arranged, and a plug connector, wherein the plug connector has a high voltage contact, which is connected to the secondary side of the transformer by means of a wire, which resiliently presses against an electrical contact surface. The contact surface is concavely shaped.

First claim

What is claimed is:

1. An ignition coil, comprising:
a housing in which a transformer is arranged; and
a plug connector;
wherein the plug connector comprises a high voltage contact connected to a secondary side of the transformer by a wire resiliently pressing against an electrical contact surface;
wherein the electrical contact surface is concavely shaped; and
wherein the electrical contact surface comprises a circular groove and the wire is inserted into the groove.

2. The ignition coil according to claim 1 , wherein an end surface of the wire presses against the electrical contact surface.

3. The ignition coil according to claim 1 , wherein the wire presses a rounded end face against the electrical contact surface.

4. The ignition coil according to claim 1 , wherein the high-voltage contact is a rod, which provides the electrical contact surface on its end facing the transformer.

5. The ignition coil according to claim 4 , wherein the contact surface is provided as a cap placed on the rod.

6. The ignition coil according to claim 5 , wherein the cap has an annular bead, which rises in the longitudinal direction of the rod and surrounds one end of the wire piece.

7. The ignition coil according to claim 4 , wherein the rod contains an interference resistor.

8. The ignition coil according to claim 1 , wherein the wire is a lead of a diode arranged between the high-voltage contact and secondary side of the transformer.

9. The ignition coil according to claim 1 , wherein the wire is bent in the shape of an L, so that an end section of the wire pressing against the contact surface forms an acute angle with the plugging direction of the plug connector of less than 30°.

10. The ignition coil according to claim 1 , wherein the electrical contact surface comprises a bottom and a wall or bead, wherein the wire is pressed against an inside of the wall or bead and against the bottom.

11. The ignition coil according to claim 1 , wherein the groove narrows towards its bottom.

12. The ignition coil according to claim 11 , wherein the groove narrows towards its bottom so much that the wire cannot touch the bottom.

13. An ignition coil, comprising:
a housing in which a transformer is arranged; and
a plug connector;
wherein the plug connector comprises a high voltage contact connected to a secondary side of the transformer by a wire resiliently pressing against an electrical contact surface;
wherein the electrical contact surface is concavely shaped; and
wherein a convex protrusion rises from the concave surface such that a groove is formed around the perimeter of the protrusion.

14. The ignition coil of claim 13 , wherein the groove is circular.

Assignees

• Borgwarner Ludwigsburg Gmbh

Inventors

• Tridico Francesco
• Stifel Timo
• Adolf Manfred
• Wüstenhagen Dirk
• Schumm Sven

Classifications

• H01F27/2828

  Construction of conductive connections, of leads · CPC title

• F02P13/00

  Sparking plugs structurally combined with other parts of internal-combustion engines ({connection of ignition coil to spark plug connector F02P3/02;} with fuel injectors F02M57/06 {; spark plug connector per se H01T13/04 – H01T13/06; predominant aspects of sparking plug, see H01T13/40 – H01T13/44}) · CPC title

• H01F27/40

  Structural association with built-in electric component, e.g. fuse · CPC title

• H01F38/12 Primary

  Ignition, e.g. for IC engines · CPC title

• F02P15/008

  Reserve ignition systems; Redundancy of some ignition devices · CPC title