Industrie Magneti Marelli Spa

Magneti Marelli S.p.a.

Bitron S.p.a.

Industrie Magneti Marelli S.r.l.

Industrie Magneti Marellui Spa

Giancarlo Fasola

Giovanni Cerizza

Pietro De Filippis

Fabio Arpino

Mario Bassi

Pietro Navarra

Flavio Maggi

Sergio Casti

William T Hyder

An electronic motor (,) of the electronic commutation type provided with a rotor (,) presenting a centre of rotation (C,) and a number of radial teeth (,) located along respective radial directrixes (K) passing through the centre of rotation (C,) and radially limited by a surface (,) presenting a bending centre (C,) located at any point along a radial directrixx (K) with the exception of a part (T,) included between said centre of rotation (C,) and the surface (,) itself excluding the centre of rotation (C,) and the internal surface (,).

Electric motor of the electronic commutation type for applications with a feeder line

The system includes a direct-current voltage supply, an electric motor for rotating a movable pinion, and an electromagnetic operating device including a solenoid and an associated movable core. The core moves the pinion towards an operating position in which it can be coupled for rotation with a rotary member of the internal combustion engine. The connection between the electromagnetic operating device and the voltage supply is controlled by an electronic unit which measures the current flowing in the solenoid by means of a portion of the wire forming the solenoid, which portion is bent and preferably twisted, and acts as a resistive shunt.

Starter system for an internal combustion engine and a solenoid usable

The device comprises two fixed contacts, a movable assembly coupled to the central portion of a movable contact the free ends of which can cooperate with the said fixed contacts, and a control electromagnet comprising a solenoid and a movable core displaceable from an initial rest position to a final position in which it strikes a stop element carrying with it the movable assembly so as to bring the end of the movable contact against the fixed contacts before reaching the final position. The movable contact can flex resiliently like a beam under the effect of its engagement with the fixed contacts. When the core strikes the stop element, the fixed contacts oscillate about their normal working positions. The movable contact is made in such a way that, as the fixed contacts start to oscillate its free ends follow the movements of the fixed contacts, its acceleration in its own mode of vibration being greater than the acceleration of the fixed contacts and its amplitude of oscillation being greater than the amplitude of oscillation of the fixed contacts.

Electromagnetic device for controlling the supply of current to the

The system includes a direct-current voltage supply, an electric starter motor for rotating a movable pinion, and an electromagnetic operating device which, when it receives an excitation current, moves the pinion to couple it for rotation with a rotary member of the internal combustion engine. In operation, an electronic control unit cuts off the current supply to the electromagnetic operating device as soon as the speed of rotation of the engine shaft exceeds a predetermined threshold and the acceleration of the shaft is less than or equal to zero.

Starting system for an internal combustion engine

An electrical switch, particularly for controlling the supply of current to the electric starter motor of an internal combustion engine, in which the movable device and/or its control device are formed in such a way that, in its operating position, the movable contact oscillates after it has struck the fixed contacts and assumes successive configurations in which its deformation or deflection always keeps the same sign.

Electrical switch, particularly for controlling the supply of current to

The starter includes a movable pinion and a control electromagnet. A transmission between the core of the electromagnet and the pinion includes a rocker lever. The lever has a shaped profile so that the initial loadless travel of the core is shorter than would be the case with a substantially straight lever, if other geometrical conditions remain the same.

Starter for an internal combustion engine for motor vehicles

An electromagnetically-operated starter motor has a movable electrical contact constituted by a metal plate having, in one of its flat faces, a notch adapted to define an apical region which is subject to stresses within its plastic range. A vibration damper is thus created within the movable contact and eliminates problems resulting from resilient impacts between the contacts.

Starter device for internal combustion engines and an

Ignition system for an internal combustion engine

An electromagnetic device for controlling the supply of current to an electric starter motor includes a pair of fixed contacts on a support for connection to a power supply and a starter motor, respectively. A movable contact which is adapted to engage both fixed contacts is carried by a movable core of an electromagnet so that upon energization of the electromagnet, the movable contact engages both fixed contacts to complete the circuit to the starter motor. A spring is provided for biassing the movable contact away from the fixed contacts upon de-energization of the electromagnet. A flexible braided conductor is permanently connected between the movable contact and one of the fixed contacts to provide an equipotential electrical connection therebetween.

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Milan, Italy

Giancarlo Fasola