| 摘要 |
A nozzle assembly (16) of a fuel injector comprises a nozzle body in which a needle member (84) is adapted to translate. The nozzle assembly is further provided with an electrical circuit comprising the needle member (84), the nozzle body, isolation means and, conductive means enabling electrical contact when the needle is in closed position so that, an electrical signal enabling contact detection is measurable between the needle member and the nozzle body. Also, the nozzle assembly further comprises a piezoresistive device configured to continuously vary said 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 of pressure. |
