A fuel rail
is essentially a pipe (usually resembling a rail) used to deliver fuel
to individual fuel injectors
on internal combustion engines
. It is designed to have a pocket or seat for each injector as well as an inlet for a fuel supply. Some fuel rails also incorporate an attached fuel pressure regulator
. Fuel rails are used on engines with multi-point
fuel injection systems, although some multi-point systems use a fuel distributor with individual pipes or tubes to feed each injector.