초록 ▼

An electronic ignition system for an internal combustion engine is so controlled that an ignition current or secondary current caused by an ignition spark at the respective spark plug in the secondary coil of an ignition transformer is evaluated for initiating, if necessary, follow-up charges of the

An electronic ignition system for an internal combustion engine is so controlled that an ignition current or secondary current caused by an ignition spark at the respective spark plug in the secondary coil of an ignition transformer is evaluated for initiating, if necessary, follow-up charges of the primary coil to thereby generate further ignition impulses. The initial loading or charging impulse is provided by a respective control circuit. The total sparking time at the respective spark plug thus corresponds to a sequence of individual impulses, each of which causes an ignition spark. The detection of the ignition current in the secondary coils is performed with an ignition current measuring circuit arrangement connected to the secondary coils. This measuring circuit (SC) generates a signal representing the secondary or ignition current represented as a voltage drop across a measuring resistor (R.sub.2). The voltage drop signal is supplied to an evaluating circuit which in turn generates a follow-up loading signal in response to the result of the evaluation of the measured voltage drop signal.

대표청구항 ▼

[ What is claimed is:] [1.] A method for controlling an electronic ignition system for internal combustion engines, comprising the following steps:(a) generating ignition timing signals for defining ignition cycles, each of which is started by a respective timing signal,(b) generating during each ig

[ What is claimed is:] [1.] A method for controlling an electronic ignition system for internal combustion engines, comprising the following steps:(a) generating ignition timing signals for defining ignition cycles, each of which is started by a respective timing signal,(b) generating during each ignition cycle a plurality of ignition sparks applied to a respective spark plug (Zk.sub.1 . . . Zk.sub.4);(c) first charging a primary winding (P.sub.1 . . . P.sub.4) of an ignition transformer, in response to an ignition cycle starting timing signal,(d) sensing a primary current (I.sub.pr) in said primary winding and stopping said first charging in response to said primary current (I.sub.pr) exceeding a fixed threshold primary current (I.sub.pr) value,(e) further repeatedly charging said primary winding during a time period remaining in a respective ignition cycle after a secondary ignition current (I.sub.sec) has stopped flowing following a preceding charging step, and(f) stopping said further chargings in response to said primary current (I.sub.pr) reaching respectively a determined primary current value.