methods and apparatus for regulating the function of a suspension system are disclosed herein . suspension characteristics often contribute to the efficiency of a suspended system . depending on the desired operating parameters of the suspended system , it may be desirable to alter the functional characteristics of the suspension from time to time in order to maintain or increase efficiency . the suspension hereof may be selectively locked into a substantially rigid configuration , and the damping fluid may be phase separated and / or cooled to increase damping rate during use . the suspension hereof may generate power usable to achieve any or all of the foregoing or to be stored for use elsewhere in the suspended system or beyond .