Ignition coil unit for an internal combustion engine

Details Ignition coil unit for an internal combustion engine Ignition coil unit for an internal combustion engine

1991-09-30

1992-09-08

Dolinar, Andrew M.

Internal-combustion engines

High tension ignition system

Radio interference protection

123634, F02P 3055

Patent

active

051449358

ABSTRACT:
An ignition coil unit comprising an open-circuit magnetic iron core (6) having a longitudinal axis C, a primary coil (2) wound around the open-circuit magnetic core (6), a secondary coil (7) wound around the primary coil (2) and an outer magnetic iron core (10) disposed around the secondary coil (7). A power switching element (9a) for switching a primary current flowing through the primary coil (2) is disposed on the longitudinal axis of the open-circuit magnetic iron core (6) at its one end. A magnetic shield (20,21) is disposed between the open-circuit magnetic iron core (6) and the power switching element (9a) for protecting the latter against leakage magnetic fluxes from the open-circuit magnetic iron core (6). The magnetic shield may be a magnetic shunt plate (20) for leading the leakage flux into the outer magnetic iron core (10) or a magnetic shield case (21) surrounding the power switching element (9a).

REFERENCES:
patent: 3048704 (1962-08-01), Estes
patent: 3304926 (1967-02-01), Maiden et al.
patent: 4841944 (1989-06-01), Maeda et al.

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