Ignition coil
AssigneeDenso Corporation
InventorYuki Kondo
Life of this patent
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Abstract
An ignition coil for use in an internal combustion engine includes a primary coil, a secondary coil, a core, and a magnet. The core creates a closed magnetic circuit through which magnetic flux produced upon energization of the primary coil flows. The core has formed therein a gap through which the magnetic circuit passes. The magnet is disposed in the gap and has magnetic domains whose magnetization vectors are at least partially oriented obliquely relative to a gap direction. The orientation of the magnetization vectors in the magnet minimizes an energy loss when primary energy is transformed into secondary energy.
Claims11
An ignition coil comprising:
- a primary coil and a secondary coil which are magnetically coupled with each other;
- a core which defines a closed magnetic circuit, wherein magnetic flux produced by energization of the primary coil flows in the magnetic circuit, the core has a gap formed therein, and the magnetic circuit extends through the gap;
- and
- a magnet which is disposed in the gap of the core,
- wherein the magnet has magnetization vectors at least a portion of which is inclined relative to a gap direction.
Dependencies are inferred from the claim text.