Federal-mogul Ignition Srl

Cooper Industries Italia Spa

Giorgio Bernardi

Roberto Righi

Graziano Gualdi

Enrico Martagni

Daniele Rossi

Gabriele Poletti

Giovanni Casazza

An ignition coil for a motor vehicle, comprising: a magnetic core ( ) having an elongated shape, a primary spool ( ) supporting a low-voltage winding ( ), and a secondary spool ( ) supporting a high-voltage winding ( ). The two spools are set coaxially with respect to the magnetic core. The coil includes a tubular shaped outer casing ( ) carrying, at a first end, a low-voltage connector ( ) and, at a second end, a high-voltage connector ( ) which is designed to connect with a spark plug. A diode ( ) is set at one end of the high-voltage spool ( ) and has both a first rheophore ( ), which is electrically connected to one end of the high-voltage winding ( ), and a second rheophore ( ), which is electrically connected to the high-voltage connector ( ). The coil includes a diode-supporting member ( ) which is equipped with anchoring elements ( ) for retaining the diode ( ) to the end of the secondary spool ( ) by bending each of the rheophores ( ) around one of the anchoring portions ( ).

Ignition coil for motor vehicles

An ignition coil for motor vehicles with a single output terminal comprises a body ( ) carrying at one of its ends a flexible cap ( ) provided with a seat ( ) designed to receive an end ( ) of a spark plug. The cap ( ) comprises a high-voltage terminal ( ) electrically connected to the high-voltage winding of the coil and provided with a connection portion designed to receive a terminal ( ) of the plug ( ). A diode ( ) is housed inside said cap ( ) and is connected in series between two portions ( ) of said high-voltage terminal.

Ignition coil for vehicles

An ignition coil for motor vehicles, comprising: a magnetic core ( ) having a rectilinear axis; a secondary spool ( ) supporting a high-voltage winding ( ) and being set coaxially with respect to the magnetic core ( ); a primary spool ( ) supporting a low-voltage winding ( ) and being set coaxially with respect to the secondary spool ( ) and outside the latter; a tubular-shaped outer casing ( ) which encloses the assembly comprising the magnetic core ( ) and the spools ( ); and a low-voltage connector ( ) including a connector body ( ) made of plastic material and a plurality of metal contacts ( ) fixed to the connector body ( ). In the ignition coil, the connector body ( ) is made of a single piece with the primary spool ( ).

An ignition system for internal combustion engines with spark ignition comprising an ignition coil, a spark plug connected to the secondary winding, an electric supply circuit associated with the primary winding of the coil, where the said circuit includes a semiconductor device controlled by an electronic control unit programmed to produce a charging cycle in the course of which the instantaneous current flowing in the primary winding gradually increases from a minimum value to a maximum value and then returns brusquely to the minimum value. The electronic control unit is programmed to produce a succession of charging cycles during one and the same engine cycle. Each of the said charging cycles is separated from the previous cycle by a time interval (W) of a duration that is either equal to or greater than the duration (DA) of a discharge cycle.

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Modena, Italy

Giorgio Bernardi