Fuel Rail
DESCRIPTION
| 1 - Fuel Rail |
| 2 - Fuel Rail Bolts |
The high pressure pump supplies diesel fuel to the fuel rail (left side shown) which deliveries high pressure fuel to all injectors. A fuel rail pressure sensor, fuel rail pressure solenoid, and the return flow line are all combined to keep the fuel pressure in the fuel rail at the required pressure.
OPERATION
The stored fuel volume inside the rail acts as a damper for pressure fluctuations which result because of a pulsating supply and brief large extractions of fuel during injector firing. The rail primarily influences the atomization of fuel at the injector nozzle, and the accuracy of injected quantity during injection.