Patent ID: 9188119
Filing Date: 2015-11-17
Classification: F01B,F04B

Abstract:
1. A method of operating a fluid-working machine having a plurality of working chambers of cyclically changing volume, a high-pressure fluid manifold and a low-pressure fluid manifold, at least one valve linking each working chamber to each manifold, the method comprising: determining a mode of each chamber on successive cycles of changing working chamber volume so as to vary the time averaged effective flow rate of fluid through the machine according to a demand level; and operating the valves of each of the chambers to select the determined mode in accordance with an operation sequence which, in the successive cycles of changing working chamber volume, intersperses modes including at least (i) partial stroke modes in which only part of the usable volume of the chamber is used and (ii) idling modes, with a proportion of partial stroke modes compared to idling modes selected to achieve a specific demand level.