Noise attenuation in a hydraulic circuit
AssigneeCaterpillar Inc.
InventorDavid C. Hale
Life of this patent
Estimating the term…
Abstract
A method is provided for attenuating noise in a hydraulic circuit having a pump in fluid communication with a hydraulic actuator by a conduit. The method includes supplying a flow restricting device in the conduit and generating a signal representative of a fluid fluctuation in the conduit downstream of the flow restricting device. A bypass loop is provided in parallel with the flow restricting device and the bypass has a valve. The valve is controlled based on the generated signal to generate a corrective fluid flow to attenuate the noise.
Claims19
A method for attenuating fluid-born noise in a hydraulic circuit having a pump in fluid communication with a hydraulic actuator by a conduit, comprising:
- supplying a flow restricting device in the conduit;
- monitoring a fluid fluctuation in the hydraulic circuit;
- generating a signal representative of the fluid fluctuation in the conduit downstream of the flow restricting device;
- providing a bypass loop in parallel with the flow restricting device, the bypass loop having a valve;
- and
- controlling the valve based on the generated signal to generate a corrective fluid flow to attenuate the noise.
A system for attenuating noise in a hydraulic circuit having a pump in fluid communication with a hydraulic actuator by a conduit, the system comprising:
- a sensor assembly coupled to the conduit, the sensor assembly being configured to monitor a fluid fluctuation in the hydraulic circuit and to generate a signal representative of the fluid fluctuation in the hydraulic circuit;
- a bypass loop connected in parallel with the conduit, the bypass loop having a valve;
- and
- a controller electrically coupled to the sensor assembly and being configured to control the valve based on the generated signal to attenuate the noise in the hydraulic circuit.
A machine, comprising:
- a pump;
- a hydraulic actuator in fluid communication with the pump by a conduit;
- a flow restricting device disposed in the conduit between the pump and the hydraulic actuator;
- a sensor coupled to the conduit, the sensor being configured to monitor a fluid fluctuation in the hydraulic circuit and to sense a signal representative of the fluid fluctuation in the hydraulic circuit;
- a bypass loop in fluid communication with the conduit at a first junction upstream of the sensor and the flow restricting device and a second junction downstream of the sensor and the flow restricting device, the bypass loop having a valve;
- and
- a controller electrically coupled to the sensor, the controller being configured to control flow across the valve based on the generated signal.
Dependencies are inferred from the claim text.