[2] Comparison to the Conventional System 3 System In-line, VE Pump Common Rail System High-pressure Pipe Momentary High Pressure Timer Nozzle Governor In-line Pump VE Pump Rail TWV Supply Pump Usually High Pressure Delivery Valve Feed Pump SCV (Suction Control Valve) Injector Fuel Tank Injection Quantity Control Pump (Governor) Engine ECU, Injector (TWV)*1 Injection Timing Control Pump (Timer) Engine ECU, Injector (TWV)*1 Rising Pressure Pump Engine ECU, Supply Pump Distributor Pump Engine ECU, Rail Injection Pressure Control Dependent upon Speed and Injection Quantity Engine ECU, Supply Pump (SCV)*2 *1 TWV: Two Way Valve *2 SCV: Suction Control Valve QD2341E