Diesel fuel is transported from the tank via the use of a pump. Prior to the widespread adoption of electronic fuel injection, most engines used mechanical fuel pumps.
- Max pump pressure is 200 bars
- Mechanical injectors open & close 1 time per cycle
- Pump pressure is measured in bars:
- Glock 9mm – 2520 bars
- Mechanical pump – 200 bars
- High pressure pump – 1800 bars
High pressure pumps
- Max pressure is 1800 bars (common rail technology)
- Electronic injectors (up to 7 holes per injector)
- Injectors can open & close up to 5 times per cycle
- Pre (reduces noise) & post (raise temperature of exhaust gas for re-generation of standard diesel particulate filter) injection possible
Common rail technology
Common rail technology is a fuel-injection system on a diesel engine in which one line (or rail) holds fuel at a certain pressure and feed lines run from it to each fuel injector.