Patent ID: 9133839
Filing Date: 2015-09-15
Classification: F04B,G16Z

Abstract:
1. A method of detecting a fault in a fluid-working machine comprising a plurality of working chambers of cyclically varying volume, each said working chamber operable to displace a volume of a working fluid which is selectable by active control of one or more electronically controllable valves for each cycle of a working chamber volume to carry out a working function responsive to a received demand signal, the method comprising determining whether a measured output parameter of the fluid working machine which is responsive to the displacement of the working fluid by one or more of the working chambers to carry out the working function fulfils at least one acceptable function criterion, the method further comprising taking into account the previously selected net displacement of the working fluid by a working chamber of said plurality of working chambers by the active control of one or more electronically controllable valves during a cycle of working chamber volume to carry out the working function.