Ignition apparatus for internal combustion engine

Details Ignition apparatus for internal combustion engine Ignition apparatus for internal combustion engine

1996-01-03

1996-12-17

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123479, 123609, 324380, F02P 1700

Patent

active

055842755

ABSTRACT:
An ignition apparatus for internal combustion engine capable of easily and securely sensing an ignition state based on the voltage level of an ignition signal to a power transistor includes ignition coils 13 each serving an ignition power unit 1 of the internal combustion engine, the power transistor 14 for feeding and shutting off a primary current i1 to and from the ignition coil, an ignition sensing circuit 5 for confirming that the primary current is normally fed and shut off, and a control circuit 4 including a CPU 41 for controlling fuel injection to each cylinder based on operating state signals D from various sensors 3 and outputting an ignition signal G by calculating a primary current feed time and an ignition timing of the internal combustion engine. The ignition sensing circuit includes a comparator 52 for comparing the voltage level of the ignition signal with a reference voltage level VR corresponding to a target current value of the primary current and outputs an ignition sensing signal Gd when the voltage level reaches the reference voltage level.

REFERENCES:
patent: 4301778 (1981-11-01), Latapie
patent: 4366794 (1983-01-01), Hachiga et al.
patent: 5199405 (1993-04-01), Mukaihira et al.
patent: 5299543 (1994-04-01), Taruya et al.

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