Ignition device for an internal combustion engine

Details Ignition device for an internal combustion engine Ignition device for an internal combustion engine

1999-10-28

2001-09-18

Mai, Anh (Department: 2832)

Inductor devices

With outer casing or housing

Potted type

C336S107000, C336S208000

Reexamination Certificate

active

06292082

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an ignition device for an internal combustion engine. The ignition device has at least one ignition coil which is provided for direct contacting with a spark plug of the internal combustion engine.
BACKGROUND INFORMATION
German Patent Application No. 39 20 080 describes an ignition device having several ignition coils for an internal combustion engine in which each of the ignition coils is arranged above a well of the cylinder head of the internal combustion engine. A high-voltage plug connector joined to each ignition coil is inserted in the well, the plug connector forming the connection between a high-voltage output of the ignition coil and a terminal stud of the spark plug which is fixedly inserted in the well.
The spark plug connector contains a cylindrical, elongated interference suppression resistor, whose longitudinal extent is flush with the longitudinal extent of the well.
A disadvantage of this arrangement of the ignition coil in conjunction with the joined spark plug connector and its elongated interference suppression resistor is that the ignition device is bulky in size and can no longer be used in tight installation circumstances.
SUMMARY OF THE INVENTION
An advantage of the ignition device according to the present invention is that the aforementioned inadequacy is avoided to a satisfactory degree. For this purpose, instead of the interference suppression resistor, an interference suppression element in the form of an inductor is used which dampens the electrical interference energy occurring at the spark plug during an ignition sequence by its alternate current resistance. The inductor is at least in part formed from a winding wire which is also used in the production of a winding set of an ignition coil.
This design makes it possible to integrate the interference suppression element into the ignition coil advantageously in terms of design and production engineering. In the ignition device, this results in a reduction of space requirements, connection points, installation expense, number of components and consequently costs as well.


REFERENCES:
patent: 6094122 (2000-07-01), Sexton
patent: 39 20 080 (1991-01-01), None
patent: 0837481A2 (1998-04-01), None

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