The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2015
Filed:
Feb. 23, 2011
William Hugh Salvin Rampen, Edinburgh, GB;
Niall James Caldwell, Edinburgh, GB;
Michael Richard Fielding, Linlithgow, GB;
Stephen Michael Laird, Edinburgh, GB;
Uwe Bernhard Pascal Stein, Edinburgh, GB;
John Tearlach Campbell, Edinburgh, GB;
William Hugh Salvin Rampen, Edinburgh, GB;
Niall James Caldwell, Edinburgh, GB;
Michael Richard Fielding, Linlithgow, GB;
Stephen Michael Laird, Edinburgh, GB;
Uwe Bernhard Pascal Stein, Edinburgh, GB;
John Tearlach Campbell, Edinburgh, GB;
ARTEMIS INTELLIGENT POWER LIMITED, Loanhead, GB;
Abstract
In a method of detecting a fault in a fluid-working machine including a plurality of working chambers of cyclically varying volume, each working chamber is operable to displace a volume of working fluid which is selectable for each cycle of working chamber volume to carry out a working function responsive to a received demand signal. An output parameter of the fluid working machine, which is responsive to the displacement of working fluid by one or more of the working chambers to carry out the working function, is measured. It is determined whether the measured output parameter fulfils at least one acceptable function criterion, taking into account the previously selected net displacement of working fluid by a working chamber during a cycle of working chamber volume to carry out the working function.