HIGH PRESSURE FUEL PUMP CONTROL [SKYACTIV-X 2.0]
id0140hf005600
Outline
• Changes the fuel pressure applied to the fuel injector according to engine operation conditions to improve engine output and startability.
• The PCM determines the fuel pressure value corresponding to the engine operation conditions based on each input signal, and drives the spill valve control solenoid valve for optimum control of fuel pressure.
Block Diagram
OPERATION
Directly after engine start
-
• During a cold engine start, the fuel pressure is raised to promote fuel atomization.
Basic Control
-
• The PCM determines the target fuel pressure between 30—60 MPa according to the engine speed, charging efficiency, engine coolant temperature, and fuel temperature, and performs the feedback control by monitoring the fuel pressure in the fuel rail with the fuel pressure sensor.
