The ongoing electrification of mobile machinery puts new demands on the hydraulic systems - they must become more efficient and quieter. One way to make them more efficient is to incorporate energy recovery. That often means that hydraulic pumps must also be able to work as motors. Efficient system solutions also need flow control for the pump. Traditionally, displacement control is used, but electrification makes speed control more relevant than ever before. All this increases the number of modes of operation for the hydraulic pump/motor, making commutation problematic. Commutation is crucial for both efficiency and noise. One feature sometimes used in pumps to facilitate commutation is the so-called ripple chambers. In this paper, the influence of such solutions is examined in simulation for different modes of operation. The results show that ripple chambers can be feasible for multi-mode operation.