Patent ID: 8337179

Claim:
A device for reducing hydraulic-fluid oscillation in an engine pump of an aircraft engine, which engine pump operates at audible frequencies, which engine pump conveys a fluid to a single hydraulic line by pressure pulsations, the device comprising: an actuator, arranged in the single hydraulic line for generating pressure pulsations that compensate for the pressure pulsations of the engine pump; a control device for controlling the actuator as a function of the pressure pulsations occurring in the single hydraulic line; and a sensor in the single hydraulic line for registering the occurring pressure pulsations and configured for providing a respective output signal to the control device, wherein the sensor is arranged in the single hydraulic line so as to be upstream of the actuator at a distance of less than or equal to λ/6 from the actuator, wherein λ is a predetermined characteristic wavelength of a predetermined hydraulic oscillation to be reduced in the single hydraulic line.