HIGH PRESSURE FUEL PUMP [SKYACTIV-G 1.5, SKYACTIV-G 2.0]

id0114zg731400


Purpose, Function

•  The high pressure fuel pump is used for the direct fuel injection system. Fuel, with a pressure of 450 kPa {4.59 kgf/cm2, 65.3 psi}, from the fuel pump built into the fuel tank is boosted up to 20 MPa {204 kgf/cm2, 2901 psi}, and it is pumped to the fuel distributor in an easily atomizable state.

Construction

•  The high pressure fuel pump is located on the exhaust camshaft at the rear of the engine.
amxzzn00001904
•  The high pressure fuel pump consists of a spill valve control solenoid valve, spill valve, piston, and discharge valve.
amxzzn00001097

Operation

•  Fuel is suctioned and pumped by the up and down movement of the piston caused by the rotation of the cam installed to the rear end of the exhaust camshaft.
•  Based on the control signal from the PCM, the spill valve control solenoid valve opens and closes in the high pressure fuel pump.
•  If the spill valve control solenoid valve malfunctions and the fuel pressure exceeds the specified value, the relief valve opens to assure safety.
amxzzn00001098
•  For the high pressure fuel pump control details, refer to the [CONTROL SYSTEM]. (See HIGH PRESSURE FUEL PUMP CONTROL [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

Fail-safe

DTC

Fail-safe
P0089:00
•  Limits intake air amount.
•  Stops high pressure fuel pump control.
•  The upper limit of the engine speed is 2,500 rpm.
•  The lower limit of the engine speed is 1,000 rpm.
P0091:00
•  Limits the intake air amount.
•  Stops the high pressure fuel pump control.
P0092:00
•  Limits the intake air amount.
•  Stops the high pressure fuel pump control.