| 摘要 |
<p>PURPOSE:To contrive miniaturization of the dimensions of an ignition coil and an increase its output by a method wherein the ignition coil is provided with a magnet in a core. CONSTITUTION:A core has only a gap where a tabular permanent magnet is inserted. The core is formed in such a way that the minimum sectional area of the core and the area facing the gap in the core are wider than the minimum sectional area of the core and the numerical values of the minimum sectional area of the core and the area facing the gap part are respectively within the range of a prescribed numerical value, while the permanent magnet is a rare- earth magnet, such as a samarium-cobalt magnet, has a strength of suth the extent that the core is magnetically saturated and is formed in such a way that the numerical values of the thickness and sectional area of the magnet are respectively within the range of a prescribed numerical value. Accordingly, a small-sized and high-performance ignition coil, which can obtain a high secondary generated voltage for its size, can be provided.</p> |
