Theory of Operation TM2361 (24JUN08) 9010-05-7 450DLC Excavator Operation and Tests 062608 PN=255 End Injection 10 Injection ends when the current is removed from the two-way valve (10). The valve closes, causing fuel to fill the control chamber (14) through orifice 2 (13). The valve spring (16) and the hydraulic force from the fuel in the 11 18 control chamber cause the hydraulic piston (15) to push down and close the nozzle (17). At this time the injection is complete.
3 12 3—Electronic Injector 10—Two-Way Valve 13 14 11—Fuel Inlet 12—Orifice 1 13—Orifice 2 15 14—Control Chamber 15—Hydraulic Piston 16—Valve Spring 16 17—Nozzle 18—Fuel Leak-Off –UN–25JAN06 TX1003033 17 End Injection JC89288,0000037 –19–30JAN06–5/5 9010 05 7