Inductor devices – With outer casing or housing – Potted type
Reexamination Certificate
1995-11-14
2001-07-10
Mai, Anh (Department: 2832)
Inductor devices
With outer casing or housing
Potted type
C336S107000, C123S634000, C123S635000
Reexamination Certificate
active
06259344
ABSTRACT:
The present invention relates to an ignition component for internal combustion engines and more particularly to such a component comprising a secondary winding and high-voltage output means for the secondary winding which are capable of supplying an ignition spark to a cylinder of an internal combustion engine.
BACKGROUND OF THE INVENTION
Ignition coils are already known which are intended to be mounted on a spark plug in order to supply electricity individually to such spark plug.
From the document EP-A-0 387 993, an assembly is known which is comprised of a spark plug firmly fixed to the secondary high-voltage part of an ignition coil. The primary low-voltage part of this coil is connected above the secondary part. This coil is thus partially fixed to the spark plug and is also intended for its individual supply of power.
However, such an assembly has two disadvantages. On the one hand, it is not unitary since it requires the mounting of the primary part of the coil after it has itself been mounted on the engine unit. And, moreover, it is incompatible with conventional spark plugs.
The present invention aims to overcome these difficulties.
SUMMARY OF THE INVENTION
To this end, it is the object of the invention to provide an ignition component as described above wherein the invention comprises:
a primary winding;
a secondary winding;
a casing in which are arranged the windings and a high-voltage output means; and
holding means to hold the windings and the output means in the casing.
These holding means may comprise a resin poured in the casing, or a plugging stopper.
Thus, a unitary member is achieved combining the functions of ignition coils and conventional spark plugs.
More particularly, the high-voltage output means may comprise a ceramic base insulating the conducting means from the casing.
In a particular embodiment of the invention, the primary and secondary windings are directly embedded in the resin.
In another embodiment, the windings are embedded in a first resin prior to their insertion into the other resin.
More particularly, the ignition component in accordance with the invention may comprise a cap of synthetic material between the windings and the high-voltage output means.
The said casing may comprise a covering bonded to an earth element crimped onto a base insulating the high-voltage output means from the casing.
The casing may also form a covering crimped on a base insulating it from the high-voltage output means.
The ignition component in accordance with the invention may comprise a stopper closing the casing at the opposite end from the high-voltage output means.
By way of non-limiting example, a particular embodiment of the invention will now be described with reference to the attached schematic drawings in which:
REFERENCES:
patent: 964007 (1910-07-01), England
patent: 2378893 (1945-06-01), Berkey et al.
patent: 2394768 (1946-02-01), Hankness
patent: 2459856 (1949-01-01), Wall
patent: 2478087 (1949-08-01), Bychinsky et al.
patent: 4277724 (1981-07-01), Beeghly
patent: 4825844 (1989-05-01), Fasola
patent: 4831995 (1989-05-01), Biton
patent: 5111790 (1992-05-01), Grandy
patent: 4130013A1 (1992-04-01), None
patent: 0069889 (1983-01-01), None
patent: 0387993 (1990-09-01), None
“Research Disclosure” No. 328, Aug. 1, 1991, pp. 626 000217946 “Integral Coil-Spark Plug”.
Coste Laurent
Heritier-Best Pierre
Mai Anh
Reish Andrew F.
Sagem SA
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