  Homogeneous isotropic spatial flat cosmological models with two torsion
functions in vacuum are built and investigated in the framework of de Sitter
gauge theory of gravity. It is shown that by certain choices of parameters of
gravitational Lagrangian the cosmological equations have some exact constant
solutions that turn out to be stable de Sitter critical points of dynamical
systems and can explain observable acceleration of cosmological expansion. The
role of the space-time torsion provoking the acceleration of cosmological
expansion is shown.
