  In this paper, spatially homogeneous and anisotropic Bianchi type-I
cosmological models of Brans-Dicke theory of gravitation are investigated. The
model represents accelerating universe at present and is considered to be
dominated by dark energy. Cosmological constant $\Lambda$ is considered as a
candidate for the dark energy that has negative pressure and is responsible for
the present acceleration. The derived model agrees at par with the recent SN Ia
observations. We have set BD-coupling constant $\omega$ to be ~$40000$, ~seeing
the solar system tests and evidences. We have discussed the various physical
and geometrical properties of the models and have compared them with the
corresponding relativistic models.
