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US 2019/0057808 A1Published application
Ignition device
AssigneeDenso Corporation
InventorsShota KINOSHITA, Kazuki FUKATSU, Fumiaki AOKI, Akimitsu SUGIURA
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Abstract
A step-up transformer, an oscillator, and an ignition plug are comprised. The step-up transformer has a primary winding, a secondary winding, and a core. The ignition plug is connected to a first end of the secondary winding. A gap is formed in the core. The step up transformed is provided with a shielding part which is made of a conductive material and shields the magnetic flux leaking from the gap. A second end of the secondary winding is electrically connected to the shielding part.
Claims20
An ignition device comprising:
- a step-up transformer including a primary winding, a secondary winding, and a core made of a soft magnetic material having a gap;
- an oscillator connected to the primary winding;
- an ignition plug connected to a first end of the secondary winding;
- and
- a shielding part made of a conductive material and shielding magnetic flux leaking from the gap, wherein
- the ignition device is configured to cause the ignition plug to generate discharge by applying an alternating voltage to the primary winding by the oscillator, and causes a secondary voltage generated in the secondary winding to resonate, and a second end of the secondary winding, which is the end opposite to the first end, is electrically connected to the shielding part.
3 more elements
Dependencies are inferred from the claim text.