  The efficiency of energy transduction in a temporally asymmetric rocked
ratchet is studied. Time asymmetry favours current in one direction and
suppresses it in the opposite direction due to which large efficiency ~ 50% is
readily obtained. The spatial asymmetry in the potential together with system
inhomogeneity may help in further enhancing the efficiency. Fine tuning of
system parameters considered leads to multiple current reversals even in the
adiabatic regime.
