| 摘要 |
PCT No. PCT/DE89/00516 Sec. 371 Date Mar. 8, 1991 Sec. 102(e) Date Mar. 8, 1991 PCT Filed Aug. 5, 1989 PCT Pub. No. WO90/05848 PCT Pub. Date May 31, 1990.The invention relates to a final ignition stage of a transistorized ignition system (1) having a Darlington transistor (DT), in the collector-emitter circuit of which the primary coil current (ISP) of an ignition coil (ZS) flows and which is controlled via a base line (2). According to the invention, there is a regulating transistor (T1) arranged between the base line (2) to the base of the Darlington transistor (DT) and earth, said regulating transistor being driven in correspondence with the size of the primary coil current (ISP) and for purposes of current limitation partially conducting away to earth the base current flowing into the Darlington transistor (DT). Thus, a simple, cost-effective circuit for limiting the primary coil current and thus the stored ignition power is obtained.
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