| 摘要 |
A method of detecting a fault in a fluid-working machine 100 comprising a plurality of working chambers 201-206 of cyclically varying volume, each chamber displaces a fluid volume selectable for each chamber cycle to meet a load demand. An output parameter of the fluid working machine, responsive to the displacement of working fluid by one or more chambers to meet a load, is measured. It is determined whether the measured output parameter fulfils at least one acceptable function criterion, taking into account the net displacement of working fluid by a working chamber during a cycle of working chamber volume to meet the load. By taking into account the net displacement of working fluid by a working chamber during a cycle of working chamber volume to carry out the working function, an unacceptable fault in a fluid-working machine may be detected if it causes one or more measured output parameter to respond in an unexpected way if the fluid working machine was functioning acceptably. A fluid working machine and method of operating a fluid-working machine is also claimed. |
