Ignition system for internal combustion engines

Details Ignition system for internal combustion engines Ignition system for internal combustion engines

1979-07-12

1982-05-11

Myhre, Charles J.

Internal-combustion engines

High tension ignition system

Having dwell control

123651, F02P 304

Patent

active

043287824

ABSTRACT:
In order to reduce the amount of ignition energy supplied to an ignition coil during low speed operation of the engine, an electronic circuit is provided to regulate the open time of the ignition circuit to be constant in an upper engine speed domain and to then obey a predetermined characteristic in the mid-range. The mid-range control is gradually made ineffective at lower engine speeds where the open ignition interval is determined by speed as measured by the duty cycle of the engine ignition transducer. The change of characteristics is obtained with the aid of a control voltage source which generates a speed dependent control voltage causing the discharge time of a capacitor to be extended at low engine speeds and causing the termination of the open time of the ignition to be determined by the transducer output signal.

REFERENCES:
patent: Re29862 (1978-12-01), Roozenbeek et al.
patent: 3937193 (1976-02-01), Kim
patent: 4124009 (1978-11-01), Hill et al.
patent: 4204508 (1980-05-01), Jundt et al.

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