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System Description
 
 
System Diagram
Component partsFunction
Crankshaft position sensorRefer to Crankshaft Position Sensor.
Exhaust camshaft position sensorRefer to Exhaust Camshaft Position Sensor.
Fuel rail pressure sensorRefer to Fuel Rail Pressure Sensor.
Engine coolant temperature sensorRefer to Engine Coolant Temperature Sensor.
Throttle position sensor Refer to Electric Throttle Control Actuator.
Accelerator pedal position sensorRefer to Accelerator Pedal Position Sensor.
BatteryECM detects the battery voltage.
ECMRefer to ECM.
High pressure fuel pumpRefer 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 checkvalve to control fuel rail pressure.
For details about operation, Refer to High Pressure Fuel Pump.