Method and apparatus to control an ignition system
US9945346B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Nov 11, 2014 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Nov 11, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P17/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is provided for controlling an ignition system which includes a spark plug control unit adapted to control at least one coil stage, the at least one coil stage adapted to successively energize and de-energize to provide a current to a spark plug, each coil stage includes a primary winding inductively coupled to a secondary winding. The method includes measuring low side voltages at one or more of each coil stage and controlling a duty cycle or a pulse width of a PWM-signal of a step-down converter stage dependent on a battery voltage, a maximum primary current threshold, and the measured voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.