Patent ID: 6173913
Filing Date: 2001-01-16
Classification: F02M,Y10S

Abstract:
A fuel injector nozzle assembly comprising:a nozzle defining a guide bore, a fuel pressure chamber, a seat, and a nozzle orifice; anda check valve member having an impact area and a guide portion slidably disposed in the guide bore betweenan open position in which the fuel pressure chamber is in fluid communication with the nozzle orifice anda closed position in which the impact area of the check valve member is pressing against the seat of the nozzle and the check valve member is blocking fluid communication between the fuel pressure chamber and the nozzle orifice; andthe check valve member comprising a ceramic material having a coefficient of thermal expansion .alpha.>8.times.10.sup.-6 /.degree. C. when averaged over a temperature range of 0.degree. C. to 300.degree. C.