Ignition coil having improved thermal stress resistance

摘要

The present invention relates to an ignition coil apparatus housing several ignition coils and ignition coils provided with a coating with electrical conductive, resilient material properties. An ignition coil in question includes a magnetic core of a magnetically permeable material, a high-voltage winding and a low-voltage winding in order to allow generation of a high-voltage signal for being supplied to a spark plug of an internal combustion engine. The magnetic core has at least one axis (B', C', D', D"), coaxially to which each the high-voltage winding and the low-voltage winding are arranged. The low-voltage winding is in particular arranged outwardly to the high-voltage winding .The ignition coil is provided outwardly with the aforementioned coating to avoid or at least minimize mechanical stress resulting from thermal-mechanical elongation effects and to protect against potential internal discharges. <IMAGE>