Editing Common rail (section)

{{Short description|Engine fuel delivery method}}
{{Other uses|Common rail (disambiguation)}}
[[File:Cutaway of a MAN V8 Diesel engine.jpg|thumb|300px|Diesel fuel injector as installed in a MAN V8 Diesel engine]]
'''Common rail direct fuel injection''' is a direct [[fuel injection]] system built around a high-[[pressure]] (over {{convert|2000|bar|MPa psi|abbr=on|lk=on|disp=or}}) fuel rail feeding [[solenoid valve]]s, as opposed to a low-pressure [[Fuel pump (engine)|fuel pump]] feeding [[Unit Injector|unit injectors]] (or pump nozzles). High-pressure injection delivers power and fuel consumption benefits over earlier lower pressure fuel injection,{{Citation needed|date=October 2020}} by injecting fuel as a larger number of smaller droplets, giving a much higher ratio of surface area to volume. This provides improved vaporization from the surface of the fuel droplets, and so more efficient combining of atmospheric oxygen with vaporized fuel delivering more complete [[combustion]].

Common rail injection is widely used in [[diesel engine]]s. It is also the basis of [[gasoline direct injection]] systems used on [[petrol engine]]s.