Adjustable metering valve for an internal combustion engine fuel injector
AssigneeElasis Sistema Ricerca Fiat Nel Mezzogiorno Societa Consortile per Azioni
InventorMario Ricco
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Abstract
The metering valve is controlled by the armature of an electromagnet; the avel of the armature towards the electromagnet is arrested by a stop member integral with a flange fitted to a hollow body by a ring nut connecting the skirt of the electromagnet; a spacer washer made of elastically compressible material is provided between the flange and a shoulder of the hollow body; and the tightening torque of the ring nut compresses the washer accordingly to adjust the travel of the armature. According to a variation, a washer of rigid material is provided between the flange and the shoulder, and is small in width to form a projecting annular portion of the flange, which portion of the flange is flexed accordingly by the tightening torque of the ring nut.
Claims8
An adjustable metering valve for an internal combustion engine fuel injector, wherein the metering valve is fitted to a hollow body of the injector, and is controlled by an armature of an electromagnet;
- said metering valve comprising a stop member fitted to said hollow body to arrest travel of said armature towards said electromagnet, said stop member being fitted by means of a threaded member, which is screwed on a thread on said hollow body with a calibrated tightening torque, so as to adjust the travel of said armature towards said electromagnet by means of said tightening torque;
- said thread being outside said hollow body;
- and said threaded member being operated from outside said hollow body.
Dependencies are inferred from the claim text.