Back to results
US 2006/0213489 A1Published application
Ignition coil driver device with slew-rate limited dwell turn-on
AssigneeVisteon Global Technologies, Inc.
InventorsKevin Moran, Guoming Zhu, Michael Nation
Life of this patent
Estimating the term…
Abstract
A device to control the charging rate of an ignition coil for an internal combustion spark ignition engine. The device controls the turn-on rate of the primary coil by slew-rate limiting using switching devices and a Miller-effect capacitor in order to reduce secondary oscillation magnitudes originated by a sharp transition of the controlling switch.
Claims17
A circuit for driving an ignition coil, the circuit comprising:
- a switching portion in electrical communication with the ignition coil for providing a current path;
- and
- a rate limiting portion in electrical communication with the switching circuit, the rate limiting portion being configured to control a voltage transition time as the switching portion transitions from a non-conducting mode to a fully conducting mode.
A circuit for driving an ignition coil, the circuit comprising:
- a first transistor connected in electrical series with the ignition coil;
- a second transistor connected to a controlled input of the first transistor;
- and
- a capacitor connected between the first transistor and a control input of the second transistor.
1 more element
Dependencies are inferred from the claim text.