High Pressure Oil Pump: Description and Operation

High Pressure Oil System

High Pressure Oil System, Part 1:

High Pressure Oil System, Part 2:

The 6.0L Powerstroke diesel injectors are powered by lubricating oil which is pressurized by a swashplate pump (Rexroth pump) in the engine valley. The pump output pressure ranges from 3,102 to 20,685 kPa (450 psi to 4,000 psi). Oil pressure is controlled by the Powertrain Control Module (PCM) through the Injector Pressure Regulator Valve. The PCM controls pressure in the oil rail by opening (relieving pressure) and closing (increasing pressure) the IPR valve. The high pressure oil is delivered to oil rails in the cylinder heads. An Injection Control Pressure sensor mounted on the high pressure pump cover sends an analog voltage signal (0.5V to 5.0V) to the PCM for feedback control of the oil pressure.