초록 ▼

An ignition system for internal combustion engines serves as a bracket circuit arrangement (10, 11, 12, 16) to limit the primary voltage, in order to protect parts energized with high voltage from being destroyed. The ignition system comprises a voltage bracketing of the ignition transistor (3), the

An ignition system for internal combustion engines serves as a bracket circuit arrangement (10, 11, 12, 16) to limit the primary voltage, in order to protect parts energized with high voltage from being destroyed. The ignition system comprises a voltage bracketing of the ignition transistor (3), the bracketing voltage being variable in dependence upon a secondary-side load. The primary voltage (UP) is acquired by an evaluation unit (9) and, given a high secondary load, a high bracketing voltage is used and, given a low secondary load, a low bracketing voltage is used.

대표청구항 ▼

An ignition system for internal combustion engines comprising: an ignition coil having a primary winding and a secondary winding of the ignition coil; an evaluation unit coupled to a primary voltage of the primary winding; an ignition output stage coupled to the primary winding of the ignition coil

An ignition system for internal combustion engines comprising: an ignition coil having a primary winding and a secondary winding of the ignition coil; an evaluation unit coupled to a primary voltage of the primary winding; an ignition output stage coupled to the primary winding of the ignition coil and to an output of the evaluation unit, the ignition output stage including a voltage bracketing circuit, the voltage bracketing circuit establishing a bracketing voltage, the bracketing voltage controlling a primary current flowing through the primary winding as a function of the primary voltage at the primary winding and the output of the evaluation unit; the evaluation unit determining whether a secondary load of the ignition coil is a high secondary load or a low secondary load based upon the primary voltage, the evaluation unit inducing a high bracketing voltage if the secondary load is determined to be the high secondary load, the evaluation unit inducing a low bracketing voltage if the secondary load is determined to be the low secondary load.