Electronic ignition system for internal combustion engines and m

Details Electronic ignition system for internal combustion engines and m Electronic ignition system for internal combustion engines and m

1997-02-18

1998-06-02

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Current or voltage sensing in coil primary

F02P 312

Patent

active

057586292

ABSTRACT:
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.

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patent: 5623912 (1997-04-01), Kelly

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