Patent ID: 7941290
Filing Date: 2011-05-10
Classification: F15B

Abstract:
1. A method for error containment and diagnosis in a fluid power system comprising the steps of: providing a flow rate measuring instrument, a pressure sensor, an electronic diagnostic means and an electronic control device in the fluid power system; detecting, with the flow rate measuring instrument, a fluid volumetric flow in the overall system or at least one part thereof in each case during a duty cycle of the fluid power system; detecting, with the pressure sensor, a fluid pressure in each case during the duty cycle; comparing, with the electronic diagnostic means and the electronic control device, the fluid volumetric flow value (Q) detected by the flow rate measuring system and the fluid pressure (P) detected by the pressure sensor with stored references; determining, with the electronic diagnostic means and the electronic control device, in each case at the point in time of a deviation or a change in the deviation from the reference, at which component or at which components of the system an event has occurred influencing fluid consumption in order to recognize same as subject to error; deriving, with the electronic diagnostic means and the electronic control device, guide value quantities (Q/P) from the respective volumetric flow values (Q) and the measured pressure (P); integrating or summating, with the electronic diagnostic means and the electronic control device, the derived guide value quantities (Q/P) over the duty cycle to form guide values (K choosing a corresponding guide value reference curve (K