  For the Poincare gauge theory of gravity we consider the dynamical scalar
torsion mode in a cosmological context. We explore in particular the
possibility of using dynamical torsion to explain the current state of the
accelerating Universe. With certain suitable sets of chosen parameters, this
model can give a (qualitatively) proper description of the current universe
without a cosmological constant, and the universe described is oscillating with
a period of the Hubble time.
