[2] Construction The injector consists of the nozzle portion (similar to that of the conventional type), the orifice (which regulates the injection ratio), the command piston, and the two-way solenoid valve (TWV). Upper body O-ring TWV O-ring Orifice 2 Orifice 1 Command piston Lower body Guide bushing Washer Spring Pressure pin Tip packing Nozzle Retaining nut Q000097E 11