SYSTEM / ECM System 1. Two-Way Valve: ON From ECM From ECM 2. Injection Start Two-Way Valve Two-Way Valve From Common Rail Returning to Fuel Tank Orifice 1 Control Cham- ber Control Cham- ber Hydraulic Pres- sure Piston Nozzle Nozzle 3. Two-Way Valve: OFF 4. Injection Stop From ECM From ECM Two-Way Valve Two-Way Valve From Common Rail From Common Rail Orifice 2 Hydraulic Pressure Piston Hydraulic Pressure Piston Nozzle Nozzle T1GR-02-02-012 T2-3-9 Returning to Fuel Tank From Common Rail