Antiparasitic ignition device for cars

Details Antiparasitic ignition device for cars Antiparasitic ignition device for cars

1979-11-06

1981-08-18

Lall, P. S.

Internal-combustion engines

High tension ignition system

Radio interference protection

123596, 123650, F02P 306

Patent

active

042840570

ABSTRACT:
A device and a method are provided for improving the operation of ignition devices, in which the parasitic waves causing interference are attenuated by means of a combination of resistors, connected in the primary and/or secondary of the ignition circuit (high voltage circuit of the coil). According to the invention, frequency sensitive resistor cables and a direct or simulated secondary resistance (formed by a small resistance placed in the primary of the ignition circuit) are substituted for the classical secondary resistive ignition cables and/or lumped resistors.
Ignition and RFI-radiation can so be optimized by reducing ignition energy to its original level, and by adapting the last to the actual need i.e. varying its value in accordance with engine rpm etc.

REFERENCES:
patent: 1223180 (1917-04-01), Kettering
patent: 2180704 (1939-11-01), Dietrich et al.
patent: 2478739 (1949-08-01), Beck
patent: 2768227 (1956-10-01), Ruckelshaus
patent: 3248604 (1966-04-01), Richards
patent: 3361886 (1968-01-01), Prickett
patent: 4099508 (1978-07-01), Noguchi et al.
patent: 4147145 (1979-04-01), Domland et al.

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