Patent ID: 7845617

Claim:
An electromagnetic valve ( 1 ) for the dosage of fuel in an inner combustion engine; the electromagnetic valve ( 1 ) comprises: a cylindrical tubular valve body ( 5 ); an obturator ( 9 ), which is arranged within the tubular valve body ( 5 ) and is mobile between an open position and a closed position; and an electromagnetic actuator ( 13 ) to shift the obturator ( 9 ) and comprising a coil ( 14 ) arranged outside the tubular valve body ( 5 ), a fixed magnetic pole ( 16 ) is arranged within the tubular valve body ( 5 ), a mobile keeper ( 17 ) arranged within the tubular valve body ( 5 ) mechanically connected to the obturator ( 9 ) and is adapted to be magnetically attracted by the magnetic pole ( 16 ) when the coil ( 14 ) is excited, a tubular magnetic armature ( 18 ) arranged outside the tubular valve body ( 5 ) around the coil ( 14 ), and a magnetic washer ( 20 ) having an annular shape arranged above the coil ( 14 ) between the tubular valve body ( 5 ) and the tubular magnetic armature ( 18 ) to guide the closing of the magnetic flow around the coil ( 14 ); the electromagnetic valve ( 1 ) is characterised in that the magnetic washer ( 20 ) displays a radial through slot ( 31 ) so as to have the ability to deform radially; and the tubular magnetic armature ( 18 ) is locked to the magnetic washer ( 20 ) by means of an interference driving that determines a radial deformation of the magnetic washer ( 20 ).