  In this article we discuss some aspects of double field theory cosmology with
an emphasis on the role played by the dilaton. The cosmological solutions of
double field theory equations of motion after coupling a shifted dilaton to
them are investigated. The equations of motion for a constant shifted dilaton
and a constant usaul dilaton in an FRW universe are obtained. The solutions of
these equations are obtained in both the supergravity frame and in the winding
frame. We also consider three possible dark energy candidates in a 4D universe
using double field theory cosmology and find some basic conditions which the
three dark energy candidates should satisfy. We consider the results for a more
general potential of shifted dilaton as well.
