| 摘要 |
An ignition circuit for a spark plug is provided with a high−frequency generator and a transformer. The high−frequency generator makes a switch between a DC voltage supply and the primary winding of a transformer conductive at least twice per combustion. The switch allows current to flow from the DC voltage supply to the primary winding. Thus, during the combustion, the primary winding is repeatedly provided with energy from the DC voltage supply without making use of energy which is stored in a resonant circuit. By doing this with a sufficiently high frequency, sufficient energy for the combustion can be supplied without energy from a resonant circuit being needed. Thus, it may suffice to use a primary winding with a low self−induction, which can be charged again faster, so that fewer problems arise at high speeds.
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