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 .