A fuel injector (11) supplies liquid fuel to a catalytic combustor (9)
of a fuel reforming device during startup of a fuel reforming device. A controller
sets the injection amount (Qf) for liquid fuel to a first injection amount (Qf1)
during a predetermined time (t1) after starting fuel injection. After the
predetermined time, the injection amount (Qf) is set to a second injection amount
(Qf2) which is larger than the first injection amount (Qf1). When
the elapsed time after starting fuel injection is smaller than a value (t1),
the discharged amount of uncombusted fuel is reduced by setting the injection amount
(Qf) to a minimum injection amount (Qf1) which allows ignition and combustion
in the catalyst.
