Function: A fuel rail stores fuel at high pressure and supplies it to the fuel injectors. This helps to maintain a constant pressure at all fueling rates, which is important for fuel efficiency and environmental performance.
- How it works: The fuel rail is a pressure accumulator that supplies fuel to the injectors through high pressure pipes. The engine control unit (ECU) generates current pulses that energize a solenoid valve in each injector, which sprays fuel into the cylinders.
The fuel rail supplies fuel to the fuel injectors mounted directly on the fuel rail. That the fuel is available at the required injection pressure at the start of injection and only minimal pressure fluctuations occur between the individual injections is key.
