F00R000756 Fuel Pressure Relief Valve Common Rail Limiting Valve
Name:PRESSURE LIMITING VALVE
Applicable:Bosch Common Rail System
Most common rail systems now employ a pressure regulation valve. This can be located either on the high-pressure pump or on the common rail itself. The pressure regulation valve serves with the quantity control valve to control the common rail pressure.
The pressure relief valve simply allows more or less high pressure fuel to flow into the back leak system thus increasing or decreasing the fuel pressure in the rail.