Ignition system for an internal combustion engine

Details Ignition system for an internal combustion engine Ignition system for an internal combustion engine

1991-03-19

1992-07-07

Miller, Carl Stuart

Internal-combustion engines

High tension ignition system

Current or voltage sensing in coil primary

123652, F02P 3055

Patent

active

051273888

ABSTRACT:
The system comprises: at least one spark plug, at least one ignition coil whose secondary winding is connected to the plug, a power transistor whose output path is in series with the primary winding of the coil between the two terminals of a direct-current voltage supply, and a control circuit for switching the transistor from the cut-off condition to the saturated condition to enable current to flow in the primary winding of the coil in order to generate a spark. Conveniently, the control circuit is arranged to switch the transistor progressively from the cut-off condition to the saturated condition, in dependence on the voltage detected between the terminals of its output path by the application of a driver signal which is first continuous and then pulsed.

REFERENCES:
patent: 3938490 (1976-02-01), Snyder
patent: 4375794 (1983-03-01), Wasmer
patent: 4617905 (1986-10-01), Hill
patent: 4774925 (1988-10-01), Iwata
patent: 4776311 (1988-10-01), Venieres
patent: 4918569 (1990-04-01), Maeda
patent: 5018493 (1991-05-01), Minks
patent: 5056497 (1991-10-01), Akagi
patent: 5058560 (1991-10-01), Asakura

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