Ignition coil for internal combustion engine

Details Ignition coil for internal combustion engine Ignition coil for internal combustion engine

1996-01-03

1997-02-18

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Radio interference protection

123634, F02P 304, F02P 1500, H01F 3812

Patent

active

056033079

ABSTRACT:
An ignition coil for an internal combustion engine to suppress the superposition of a noise signal caused by a capacitive discharge current at an ignition plug to thereby prevent the faulty operation of other circuit devices. The ignition coil has first and second non-magnetic bobbins into which a magnetic core 3 is inserted, a primary coil (1) wire wound around the first bobbin, a secondary coil (2) wire wound around the second bobbin, an interrupting circuit 7 connected to one end of the primary coil for interrupting a primary current i1 flowing to the primary coil, and an ignition plug 5 connected to one end of the secondary coil for generating a discharge spark by a secondary voltage V2 output from the secondary coil. A buffer coil 8 having an inductance which is much smaller than that of the primary or secondary coil is connected in series with one of them.

REFERENCES:
patent: 4186712 (1980-02-01), Fitzner et al.
patent: 4191155 (1980-03-01), Nishio et al.
patent: 4451764 (1984-05-01), Gerry
patent: 4774914 (1988-10-01), Ward

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