System Description
SYSTEM DIAGRAM
| Component parts | Function |
|---|---|
| Crankshaft position sensor | Crankshaft Position Sensor . |
| Intake camshaft position sensor | Intake Camshaft Position Sensor . |
| Fuel rail pressure sensor | Fuel Rail Pressure Sensor . |
| Engine coolant temperature sensor 1 | Engine Coolant Temperature Sensor . |
| Throttle position sensor | Electric Throttle Control Actuator . |
| Accelerator pedal position sensor | Accelerator Pedal Position Sensor . |
| Battery | ECM receives the battery voltage signal. |
| ECM | ECM . |
| High pressure fuel pump | High Pressure Fuel Pump . |
| FPCM | Fuel Level Sensor Unit, Fuel Pump and FPCM (Fuel pump control module) . |
| Low pressure fuel pump |
SYSTEM DESCRIPTION
Low fuel pressure control
- The low fuel pressure pump is controlled by ECM and pumps fuel according to a driving condition. The pumped fuel passes through the fuel filter and is sent to the high pressure fuel pump.
- Low fuel pressure is adjusted by the fuel pressure regulator.
High fuel pressure control
- The high pressure fuel pump is actuated by the cam of camshaft (EXH).
- The high pressure fuel pump activates the high pressure fuel pump solenoid based on a signal received from ECM, and adjusts the amount of discharge by changing the timing of closing the inlet check valve to control fuel rail pressure.
For details about operation, Refer to High Pressure Fuel Pump .