System Description
System Diagram
| Component parts | Function |
|---|---|
| Crankshaft position sensor | Refer to Crankshaft Position Sensor . |
| Exhaust camshaft position sensor | Refer to Exhaust Camshaft Position Sensor . |
| Fuel rail pressure sensor | Refer to Fuel Rail Pressure Sensor . |
| Engine coolant temperature sensor | Refer to Engine Coolant Temperature Sensor . |
| Throttle position sensor | Refer to Electric Throttle Control Actuator . |
| Accelerator pedal position sensor | Refer to Accelerator Pedal Position Sensor . |
| Battery | ECM detects the battery voltage. |
| ECM | Refer to ECM . |
| High pressure fuel pump | Refer to High 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 .