| 摘要 |
<p>An ignition system with an ignition coil 18 employs a power amplifier driven by a microprocessor (14) for starting and interrupting coil current, in accordance with signals from an engine driven transducer (10). The power amplifier includes a current limiter (A,, Q4), but this does not usually come into operation. lnstead, the actual current flowing just before the instant of spark in each engine cycle is measured (R7, A2,14d) and the on time of the power amplifier is adjusted for the next cycle to cause the final current to approach a desired value less than the current limit value.</p> |
