| 摘要 |
The invention relates to an ignition device for combustion engines. The ignition device has a switching transistor (7) which, when a trigger is energized, is current-conductive, further an ignition coil (6), the primary winding (5) of which forms with the transistor (7) a series circuit, and, further, a signal transducer (10) connected in advance of the trigger (11) to supply a capacitor-charging current, after a lapse of a time period of its control signal (a, b) reaching a peak value. The threshold of the trigger (11) can be shifted relative to the control signal (a,b) by use of an electrical storage device (30) which can be charged and discharged, and in which the charge is dependent on the predetermined current value in the primary winding (5). In accordance with the invention, the storage device (30) can be charged by the control signal (a,b) and can be discharged over a shunt circuit branch (32) with high resistance value (resistor 33) as well as over a shunt circuit branch (34) with low resistance value (resistor 37). Upon reaching of a primary current value of predetermined level, the charging of the storage device (30) is stopped and the shunt circuit branch (34) with low resistance value is completed when transistors (36,38) become conductive.
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