  We study the generalized efficiency of an adiabatically rocked ratchet with
both spatial and temporal asymmetry. We obtain an analytical expression for the
generalized efficiency in the deterministic case. Generalized efficiency of the
order of 50% is obtained by fine tuning of the parameter range. This is unlike
the case of thermodynamic efficiency where we could readily get an enhanced
efficiency of upto 90%. The observed higher values of generalized efficiency is
attributed to be due to the suppression of backward current. We have also
discussed briefly the differences between thermodynamic, rectification or
generalized efficiency and Stoke's efficiency. Temperature is found to optimize
the generalized efficiency over a wide range of parameter space unlike in the
case of thermodynamic efficiency.
