Patent ID: 8706306
Filing Date: 2014-04-22
Classification: F15B

Abstract:
1. A system comprising: a hydraulic device configured to operate with a fluid at a fluid pressure; a sensor configured to correctly measure the fluid pressure above a threshold level in the hydraulic device, the threshold level being a minimum of a predetermined operating range of the sensor; a pump configured to provide the hydraulic device with the fluid; an actuator configured to regulate fluid flow from the pump to the hydraulic device; wherein the sensor is configured to measure a first fluid pressure in the hydraulic device; a control module configured to determine whether a fault pending condition exists based on the first fluid pressure, including determining that the fault pending condition exists if the first fluid pressure is different than an expected fluid pressure; wherein the control module is configured to determine whether the actuator or the sensor caused the fault pending condition; wherein the control module is configured to iteratively enable and disable the actuator during the fault pending condition; wherein the sensor is configured to measure a second fluid pressure in the hydraulic device after enabling and disabling the actuator, the first fluid pressure being below the threshold level and the second fluid pressure being above the threshold level; and wherein the control module is configured to determine that the sensor caused the fault pending condition if the second fluid pressure fluctuates between a relatively higher pressure and a relatively lower pressure and the actuator caused the fault pending condition if the second fluid pressure is relatively even.