公开(公告)号：US20190301412A1

公开(公告)日：2019-10-03

申请号：US15739174

申请日：2016-06-08

Applicant: Delphi International Operations Luxembourg, S.A.R.L.

Inventor： Jean-Christophe Oge ,  Jorge Martinez

IPC: F02M51/06 ,  F02D41/20 ,  F02M47/02 ,  F02M57/00 ,  F02M61/12 ,  F02M61/18 ,  F02M65/00 ,  B05B1/30

Abstract: A nozzle assembly of a fuel injector includes a nozzle body in which a needle member is adapted to translate. The nozzle assembly is further provided with an electrical circuit so that an electrical signal enabling contact detection is measurable between the needle member and the nozzle body. The nozzle assembly also includes a piezoresistive device which continuously varies the electrical signal during the final closing displacements, or the initial opening displacements, of the needle, the variations of the signal being a function of a differential pressure.