US 6,191,674 B1 · Ignition coil for internal combustion engine

Abstract

An ignition coil that can be easily assembled, that assures co-axial alignment of a primary coil, a secondary coil and a center core part, and that generates desired high voltage. A core body is formed to have an outer diameter larger than that of a permanent magnet so that the permanent magnet will not protrude out of the outer peripheral face of the core body. Accordingly, when the center core part is inserted into a secondary spool, the center core part is not caught by the secondary spool and may be readily inserted and assembled therewith. Also, because no bulge is created at the center core part, it is possible to prevent the center core part from tilting within the secondary spool and to readily assure the co-axial alignment of the primary spool, the secondary spool and the center core part. Thus, voltage generated by the secondary coil is prevented from dropping, and high voltage may be applied to the ignition plug.

Claims19

Dependent claims

A high-voltage internal combustion engine ignition coil, comprising:

a center core part having a core body and a permanent magnet disposed at at least one end of the core body;
and
a cushion member covering an outer surface of the core body and the permanent magnet so that the permanent magnet is disposed within an outer periphery of the cushion member, wherein an angle θ between a bottom surface of the core body and an imaginary straight line A between a bottom edge of the core body and a top edge of the permanent magnet satisfies a condition of 45°≦θ≦90°.

Dependencies are inferred from the claim text.

Ignition coil for internal combustion engine

Life of this patent

Ignition coil for internal combustion engine

Life of this patent

Abstract

Claims19