1A-14 Engine Control System SPV (Spill Control Valve) Fuel injection amount is controlled with the high- response SPV by opening and closing the fuel high pressure circuit. SPV is incorporated in the injection pump. Legend 1. SPV drive signal 2. EDU 3. ECM 4. High pressure fuel 5. Valve 6. High pressure fuel passage 7. SPV 8. B-B section 1 B 7 2 3 5 B 4 6 8 LNW21AMF000901