Ignition coil
AssigneeRosenberger Hochfrequenztechnik GmbH & Co. KG
InventorsMartin Fuchs, Steffen Thies
Life of this patent
Estimating the term…
Abstract
The present invention relates to an ignition coil for generating a high-voltage pulse with a superimposed high-frequency voltage. The ignition coil comprises a first coil arranged on the primary side, a second coil arranged on the secondary side, a magnetic core and a third coil. The windings of the first coil and of the second coil are wound around the magnetic core. The second coil and the third coil are electrically connected to one another. A high-frequency terminal, which receives the high-frequency voltage, is electrically connected to the second coil and to the third coil.
Claims20
An ignition coil, comprising:
- a ground terminal;
- an output terminal;
- a first coil;
- a second coil;
- a third coil;
- and
- a capacitor, wherein
- said second coil is electromagnetically coupled with said first coil,
- a first end of said second coil is electrically conductively connected to said ground terminal,
- a second end of said second coil is electrically conductively connected to a first end of said third coil,
- a second end of said third coil is electrically conductively connected to said output terminal,
- a first contact of said capacitor is electrically conductively connected to said second end of said second coil, and
- said first contact is electrically conductively connected to said second end of said third coil.
A system, comprising:
- a magnetic core;
- a first, primary-side coil;
- a second, secondary-side coil;
- a third coil;
- and
- a capacitor, wherein
- said first coil comprises first windings wound around said magnetic core,
- said second coil comprises second windings wound around said magnetic core,
- said second coil and said third coil constitute at least part of a first electrical path from a first node to a second node,
- a first contact of said capacitor is connected to said first electrical path at a common node intermediate said second coil and said third coil, and
- said capacitor does not constitute part of said first electrical path.
A method, comprising:
- energizing a magnetic core using a flow of DC current through a first coil at least partially wound around said magnetic core,
- creating a voltage pulse in a second coil at least partially wound around said magnetic core by ceasing said flow of DC current,
- superimposing an AC signal onto said voltage pulse using a bandpass filter, and
- feeding said voltage pulse superimposed with said AC signal to a spark plug, wherein
- said spark plug comprises a first electrode and a second electrode,
- said bandpass filter comprises a third coil and a capacitor,
- said second coil, said third coil, said first electrode, and said second electrode are connected in series, and
- said capacitor, said third coil, said first electrode, and said second electrode are connected in series.
Dependencies are inferred from the claim text.