  In this work we present a generalized Brans-Dicke lagrangian including a
non-minimally coupled Gauss-Bonnet term without imposing the vanishing torsion
condition. In the resulting field equations, the torsion is closely related to
the dynamics of the scalar field, i.e., if non-minimally coupled terms are
present in the theory, then the torsion must be present. For the studied
lagrangian we analyze the cosmological consequences of an effective torsional
fluid and we show that this fluid can be responsible for the current
acceleration of the universe. Finally, we perform a detailed dynamical system
analysis to describe the qualitative features of the model, we find that
accelerated stages are a generic feature of this scenario.
