Patent ID: 7382220

Claim:
An ignition coil for an internal combustion engine, comprising: a substantially rod-shaped magnetic core; a first compensation element acting in an axial direction of the magnetic core; first and second coil shells situated concentrically with respect to each other, the first coil shell surrounding the magnetic core and the first compensation element, the first coil shell being situated within the second coil shell; and a second compensation element acting in a radial direction and being situated between the magnetic core and the first coil shell, the second compensation element having a closure element for avoiding a penetration of a sealing compound into a space between the magnetic core and the first coil shell, the first compensation element acting as a closure element at the same time, the second compensation element being a coating; wherein the first coil shell is sleeve-shaped, and a side of the first coil shell that lies opposite to the first compensation element is also sealed; wherein the first coil shell has a section at its inner wall that is reduced in diameter, at which sealing takes place; wherein a gradation is situated in the section, against which there is pressed one of (a) the magnetic core, (b) a disk-shaped magnet that follows the magnetic core axially in some instances, and (c) a core-covering disk.