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US 10,589,615 B2Granted
Decoupler for a hydraulic engine mount
AssigneeFord Global Technologies, LLC
InventorsJim Chern, Mary Theresa Breida, Thomas Mathai, Margaret Brouwer
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for reducing NVH resultant from collisions between internal components of a hydraulic engine mount. In one example, a hydraulic engine mount may include a de-coupler with a number cavities encased therein and extending along a common circumference of the de-coupler.
Claims20
A hydraulic engine mount, comprising:
- a high pressure working chamber and a low pressure compensating chamber with a partitioning structure coupled therebetween,
- a first throttle passage coupling the working chamber and the compensating chamber,
- a second, serpentine throttle passage coupling the working chamber to the compensating chamber,
- the partitioning structure including first and second partitioning plates,
- a fluidic de-coupler positioned on a protrusion of the first or second partitioning plate within the first throttle passage and the fluidic de-coupler movably coupled to the protrusion such that the fluidic de-coupler slides along the protrusion between a first position in face sharing contact with the first partitioning plate and a second position in face sharing contact with the second partitioning plate, and
- the fluidic de-coupler including a plurality of discrete, internal cavities with a partially annular shape located along a common circumference, the plurality of internal cavities reducing a velocity of the fluidic de-coupler sliding along the protrusion between the first and second positions, and a material or lack of material within the internal cavities is based on estimated resonant frequencies of the fluidic de-coupler.
3 more elements
An engine mount, comprising:
- a rigid housing;
- a rigid support element coupled to a vehicle powertrain external to the housing at a first end;
- an elastic support element within the housing, said elastic support element mechanically coupled to a second end of the rigid support element;
- a first chamber filled with a hydraulic fluid and partially defined by the elastic support element;
- and
- a second chamber filled with the hydraulic fluid and partially defined by the elastic support element, said second chamber in selective fluidic communication with the first chamber via a valve assembly;
- wherein the valve assembly includes:
- a first partition plate partially defining the first chamber,
- a second partition plate partially defining the second chamber and mechanically coupled to the first partition plate via a central protrusion of the second partition plate, and
- a hydraulic channel fluidically coupling the first and second chambers via each of the first partition plate, the second partition plate, and a fluidic de-coupler movably coupled to a protrusion such that the fluidic de-coupler slides along the protrusion between a first position with a center of the fluidic de-coupler contacting the first partition plate and a second position with the center of the fluidic de-coupler contacting the second partition plate;
- wherein the fluidic de-coupler includes a circular body and a plurality of discrete, internal cavities having a partially annular shape and positioned entirely within the circular body at a common radial position, and the plurality of internal cavities reducing velocities of the fluidic de-coupler sliding between the first and second positions at one or more resonant frequencies of the fluidic de-coupler by a greater amount than at other frequencies.
8 more elements
An engine mount, comprising:
- a rigid housing;
- a rigid support element coupled to a vehicle powertrain external to the housing at a first end;
- an elastic support element within the housing, said elastic support element mechanically coupled to a second end of the rigid support element;
- a first chamber filled with a hydraulic fluid and partially defined by the elastic support element;
- and
- a second chamber filled with the hydraulic fluid and partially defined by the elastic support element, said second chamber in selective fluidic communication with the first chamber via a valve assembly;
- wherein the valve assembly includes:
- a first partition plate partially defining the first chamber,
- a second partition plate partially defining the second chamber and mechanically coupled to the first partition plate, and
- a hydraulic channel fluidically coupling the first and second chambers via each of the first partition plate, the second partition plate, and a fluidic de-coupler coupled to a protrusion such that the fluidic de-coupler slides between face sharing contact with the first and second partition plates;
- wherein the fluidic de-coupler includes a circular body and a plurality of discrete, internal cavities positioned entirely within the circular body at a common radial position and having an annular shape, and the plurality of internal cavities reducing a velocity of the sliding of the fluidic de-coupler at one or more resonant frequencies of the de-coupler by a greater amount than at other frequencies;
- wherein the plurality of internal cavities comprises:
- a first internal cavity positioned within the circular body at a first angular position;
- and
- a second internal cavity positioned within the circular body at a second angular position, said second angular position diametrically opposed to the first angular position;
- wherein the plurality of internal cavities further comprises a third internal cavity positioned at an angular position halfway between the first and second internal cavities;
- and
- wherein the fluidic de-coupler includes first and second faces contacting the hydraulic fluid, each comprising:
- a central opening,
- an inner plurality of annular beads,
- an outer plurality of annular beads, said outer plurality of annular beads including an outermost bead at a radial extent of the fluidic de-coupler, and
- a number of circumferentially arranged nodes at a radial position between the inner and outer pluralities of annular beads;
- wherein the plurality of internal cavities is included within the fluidic de-coupler at a common radial position between the outermost bead and a remainder number of the outer plurality of annular beads.
20 more elements
Dependencies are inferred from the claim text.