Internal-combustion engines – High tension ignition system – Having an ignition coil with multiple primary or secondary...
Patent
1997-02-18
1998-09-15
Nelli, Raymond A.
Internal-combustion engines
High tension ignition system
Having an ignition coil with multiple primary or secondary...
F02P 306
Patent
active
058065059
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND INFORMATION
The present invention relates to an ignition coil arrangement for multicylinder internal combustion engines. An ignition coil arrangement of this type is also known from German Patent 36 10 067 C3.
The ignition coil arrangement is comprised of a plurality of coil units, each driven as a kind of multiple ignition coil by a driver stage. Each coil unit is composed of a primary winding and of a secondary winding attached to two spark plugs. All of the coil units are combined to form one assembly having a common casing. This results in an ignition coil arrangement of sizable dimensions, so that difficulties can be encountered when installing such an ignition coil arrangement under the cramped mounting conditions existing in the engine compartment of an internal combustion engine.
SUMMARY OF THE INVENTION
In contrast, it is an advantage of the ignition coil arrangement according to the present invention that it avoids the aforementioned deficiency to a satisfactory degree. The ignition coil arrangement is provided for this purpose with at least one coil unit as a multiple ignition coil, whose primary winding and secondary winding each have a divided and mechanically separated design. One primary partial winding and one secondary partial winding each are combined to form a partial winding and a plurality of partial windings are electrically connected in series.
Thus, the ignition coil arrangement of the present invention is comprised of a plurality of small units, each one of which, because of its small unit volume, particularly given a bar-type core, is able to be placed by itself even under cramped installation conditions, so that this ignition coil arrangement has varied uses and can be manufactured in large quantities and, thus, cost-effectively.
By partitioning in each case one primary winding and the secondary winding into electrically series-connected partial windings containing one segment of the primary winding and the associated secondary winding, material is also economized, since, for example, the iron core of the partial windings only has to be designed for a portion of the ignition voltage.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 shows a schematic drawing of an exemplary circuit diagram according to the present invention.
FIG. 2 shows a more detailed circuit diagram of the coil unit.
DETAILED DESCRIPTION OF THE DRAWING
An ignition coil arrangement for a multicylinder internal combustion engine is composed of a plurality of substantially identical coil units 11, of the multiple ignition coil type, realized as dual ignition coils, one of which is shown in FIGS. 1 and 2.
Each coil unit 11 contains a primary winding 12 and a secondary winding 14 attached to two spark plugs 13, and is controlled by a contact element 16 in the form of a driver stage, symbolized here by the graphic symbol of a transistor.
Both primary winding 12, as well as secondary winding 14 are split as mechanically and spatially separated windings into two primary partial windings 17 or two secondary partial windings 18. One primary partial winding 17 and one secondary partial winding 18 each is combined, together with an iron core 19 disposed therein, to form a first partial winding 21 or second partial winding 22. Each of partial windings 21, 22 is arranged in a casing 23.
The one end of the two primary partial windings is joined in each case to a common primary connector lead 24 and the one end of the two secondary partial windings 18 is joined in each case to a common secondary connector lead 26.
While each other end of the two secondary partial windings 18 leads to one spark plug 13, the other end of primary partial winding 17 of the first partial winding 21 leads to the positive pole of the motor vehicle's power supply, and the other end of primary partial winding 17 of the second partial winding 22 to contact element 16 that is connected to chassis potential.
A coil unit 11 having a contact element 16 can also be optionally comprised of three or more primary partial windings 17 or secondary par
REFERENCES:
patent: 4462380 (1984-07-01), Asik
patent: 4627407 (1986-12-01), Betz
patent: 5156136 (1992-10-01), Okumura
Nelli Raymond A.
Robert & Bosch GmbH
LandOfFree
Ignition coil arragement for multicylinder internal combustion e does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ignition coil arragement for multicylinder internal combustion e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ignition coil arragement for multicylinder internal combustion e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-78118