Ignition coil for an internal combustion engine
AssigneeRobert Bosch GmbH
InventorWolfgang Keller
Life of this patent
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Abstract
An ignition coil for an internal combustion engine has a rod-shaped magnetic core, which collaborates with a cushioning element in the axial direction. The magnetic core and the cushioning element are furthermore inserted into a secondary coil shell. Moreover, the coil shell has an ignition coil housing, which is filled at least partially with an epoxy resin. In order to avoid that the epoxy resin gets into the gap between the coating and the magnetic core, the cushioning element is developed as a sealing element at the same time. At the same time, the secondary coil shell has a coating on its inner wall for the accommodation of radial stresses. The ignition coil thus designed is developed to be relatively compact, and has good thermomechanical properties.
Claims9
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.
Dependencies are inferred from the claim text.