Hydraulically damping elastic bearing

Claim 2

A resilient mounting device having hydraulic damping for vibrationally damping a motor vehicle engine, said mounting device having a longitudinal axis along which damping is prevalent, said mounting device comprising: opposite first and second rigid end portions with mounting means thereat, said end portions being disposed along said longitudinal axis at either end of said mounting device; a resilient connecting element resiliently connecting said first and second end portions and forming with them a cavity for two chambers in controllable fluid communication, each with the other, said two chambers for containing damping fluid, and being disposed one adjacent the other along said longitudinal axis; a first of said two chambers being a compression chamber for permitting a build-up of pressures substantially above and below ambient pressure about said mounting device; said two chambers being separated by partition means, said partition means having a rigid inner portion and a flexible portion engaging said rigid inner portion, each of said rigid inner portion and said flexible portion being disposed in a plane substantially perpendicular to said longitudinal axis; said rigid inner portion having a channel connecting said first and said second chambers, said channel following a circular route and having a predetermined length, said circular route being at least partially radially displaced from and about said longitudinal axis in said rigid inner portion, said rigid inner portion being formed in two pieces and including a means for securing a first of said two pieces to a second of said two pieces; dividing means for dividing said channel into a divided channel having at least a first segment portion and a second segment portion, along at least a portion of the length of said channel, said dividing means having an opening to permit flow of fluid between said first segment portion and said second segment portion, said dividing means and said opening therein being disposed within an inner portion of said rigid portion of said partition means to permit flow of fluid substantially along a substantial portion of each of said first segment portion and said second segment portion when flowing from one chamber to the other, to substantially increase a path of flow of said fluid over the length of said channel when undivided, and providing means for adjusting an adjusted length of said divided channel during manufacture by angularly moving said dividing means disposed in said divided channel during manufacture to tune said divided channel such that said divided channel thus provides damping in a given type of pressure difference between said two chambers in a given frequency range; said opening in said dividing means being substantially completely open at a continuity of angular locations during any angular movement during manufacture along said circular route of said channel and; said divided channel having a substantially constant cross section throughout said adjusted length thereof such that a flow rate, of said flow of fluid through said adjusted length of said divided channel through which fluid flows, remains substantially the same.

Claim 3

The mounting device according to claim 1, wherein said dividing means comprises at least one disc shaped member disposed substantially in said plane substantially perpendicular to said longitudinal axis within said rigid portion.

Claim 4

The mounting device according to claim 2, wherein said dividing means additionally comprises at least one ring shaped member disposed within said rigid inner portion.

Claim 5

The mounting device according to claim 1, wherein said dividing means comprises at least one ring shaped member disposed within said rigid inner portion.

Claim 6

The mounting device according to claim 1, wherein said dividing means comprises at least one disc shaped member and at least one ring shaped member, each said at least one disc shaped member and each said at least one ring shaped member having at least one of said openings therein for permitting fluid to flow between said segment portions connected thereto.

Claim 7

The mounting device according to claim 5, wherein said dividing means is inserted between said at least two pieces.

Claim 8

The mounting device according to claim 5, wherein said rigid inner portion has at least two intake ports, a corresponding number of passage segment portions and a corresponding number of discharge ports, said at least two intake ports each being connected to a corresponding one of said passage segment portions and through its corresponding passage segment portions to a corresponding one of said discharge ports; at least two openings which connect at least two pairs of said segment portions with one another.

Claim 9

The mounting device according to claim 1, wherein said dividing means is inserted between said at least two pieces.

Claim 10

The mounting device according to claim 8, wherein said rigid inner portion has at least one groove therein for receiving said dividing means, said dividing means being rotatable, during assembly of said rigid inner portion, in said at least one groove in said rigid inner portion.

Claim 11

The mounting device according to claim 9, wherein said rigid inner portion has at least two intake ports, a corresponding number of passage segment portions and a corresponding number of discharge ports, said at least two intake ports each being connected to a corresponding one of said passage segment portions and through its corresponding passage segment portions to a corresponding one of said discharge ports; at least two openings which connect at least two pairs of said segment portions with one another.

Claim 12

The mounting device according to claim 1, wherein said rigid inner portion has at least one groove therein for receiving said dividing means, said dividing means being rotatable, during assembly of said rigid inner portion, in said at least one groove in said rigid inner portion.

Claim 13

The mounting device according to claim 1, wherein said rigid inner portion has at least two intake ports, a corresponding number of passage segment portions and a corresponding number of discharge ports, said at least two intake ports each being connected to a corresponding one of said passage segment portions and through its corresponding passage segment portions to a corresponding one of said discharge ports; at least two openings which connect at least two pairs of said segments portions with one another.

Claim 14

A resilient mounting device having hydraulic damping for vibrationally damping a motor vehicle engine, said mounting device having a longitudinal axis along which damping is prevalent, said mounting device comprising: opposite first and second rigid end portions with mounting means thereat, said rigid end portions being disposed along said longitudinal axis at either end of said mounting device; a resilient connecting element resiliently connecting said first and second end rigid portions and forming with them a cavity for two chambers in controllable fluid communication, each with the other, said two chambers for containing damping fluid, and being disposed one adjacent the other along said longitudinal axis; a first of said two chambers being a pressure chamber defined in part by said first rigid end portion which is sealed for permitting a build-up of pressures substantially above and below ambient pressure about said mounting device; a second of said two chambers being an unpressurized equalization chamber, said adjacent second rigid end portion defining therein airflow evacuation openings for substantially equalizing pressure in said second of said two chambers with said ambient pressure about said mounting device; said two chambers being separated by a circular partition means, said partition means having a circular outer flexible peripheral portion and a circular rigid inner portion, said rigid inner portion being disposed within said outer peripheral portion of said partition means, said outer peripheral portion comprising a flexible suspension element for holding said rigid inner portion resiliently suspended between and movable within said two chambers and damping a first type of pressure differences at least in a first frequency range between said two chambers; said rigid inner portion being disposed in a plane, which is generally perpendicular to said longitudinal axis defined therethrough; said rigid inner portion having a channel connecting said first and said second chamber, said channel, following a circular route having a predetermined length, being at least partially radially displaced from and about said longitudinal axis in said rigid inner portion; means for adjusting an adjusted length of said channel to said predetermined length during assembly of said rigid inner portion, and for tuning the damping of said passage to a given frequency range and thus providing damping in a second type of pressure difference between said two chambers in a second frequency range distinct from said first frequency range, said means for adjusting including dividing means for dividing said circular route of said channel into a divided channel having two portions including said adjusted length, said dividing means for dividing having an opening to permit flow of fluid between said two portions for passing said fluid between said two chambers, said dividing means being angularly movable during manufacture for positioning said opening therein over a substantial portion of said length of said circular channel; said opening being substantially completely open during its angular movement relative to said channel; said partition means comprising two pieces; means for securing said two pieces of said partition means to one another; and said divided channel having a substantially constant cross section throughout said adjusted length thereof such that a flow rate, of said flow of fluid through said adjusted length of said divided channel through which fluid flows, remains substantially the same.

Claim 15

A resilient mounting device having hydraulic damping for vibrationally damping a motor vehicle engine, said mounting device having a longitudinal axis along which damping is prevalent, said mounting device comprising: opposite first and second rigid end portions with mounting means thereat, said rigid end portions being disposed along said longitudinal axis at either end of said mounting device; a resilient connecting element resiliently connecting said first and second end rigid portions and forming with them a cavity for two chambers in controllable fluid communication, each with the other, said two chambers for containing damping fluid, and being disposed one adjacent the other along said longitudinal axis; a first of said two chambers being a pressure chamber defined in part by said first rigid end portion which is sealed for permitting a build-up of pressures substantially above and below ambient pressure about said mounting device; a second of said two chambers being an unpressurized equalization chamber, said adjacent second rigid end portion defining therein airflow evacuation openings for substantially equalizing pressure in said second of said two chambers with said ambient pressure about said mounting device; said two chambers being separated by a circular partition means, said partition means having a circular outer flexible peripheral portion and a circular rigid inner portion, said rigid inner portion being disposed within said outer peripheral portion of said partition means, said outer peripheral portion comprising a flexible suspension element for holding said rigid inner portion resiliently suspended between and movable within said two chambers and damping a first type of pressure differences at least in a first frequency range between said two chambers; said rigid inner portion being disposed in a plane, which is generally perpendicular to said longitudinal axis defined therethrough; said rigid inner portion having a channel connecting said first and said second chamber, said channel, following a circular route having a predetermined length, being at least partially radially displaced from and about said longitudinal axis in said rigid inner portion; means for adjusting an adjusted length of said channel to said predetermined length during assembly of said rigid inner portion, and for tuning the damping of said passage to a given frequency range and thus providing damping in a second type of pressure difference between said two chambers in a second frequency range distinct from said first frequency range, said means for adjusting including dividing means for dividing said circular route of said channel into a divided channel having two portions including said adjusted length, said dividing means for dividing having an opening to permit flow of fluid between said two portions for passing said fluid between said two chambers, said dividing means being angularly movable during manufacture for positioning said opening therein over a substantial portion of said length of said circular channel; said opening being substantially completely open during its angular movement relative to said channel; said partition means comprising two pieces; means for securing said two pieces of said partition means to one another; and said divided channel having a substantially constant cross section throughout said adjusted length thereof such that a flow rate, of said flow of fluid through said adjusted length of said divided channel through which fluid flows, remains substantially the same.

Claim 16

A mounting device according to claim 13, wherein said length adjusting means further includes said dividing means positioned between said two pieces of said rigid inner portion.

Claim 17

The mounting device according to claim 14, wherein said dividing means comprises at least one disc shaped member disposed within said rigid inner portion.

Claim 18

The mounting device according to claim 14, wherein said dividing means comprises at least one ring shaped member disposed within said rigid inner portion.

Claim 19

The mounting device according to claim 14, wherein said dividing means comprises at least one disc shaped member and at least one ring shaped member, each said at least one disc shaped member and each said at least one ring shaped member having at least one opening therein for permitting fluid to flow between segment portions connected thereto.

Claim 20

The mounting device according to claim 14, wherein said rigid inner portion comprises at least two at least partially contiguously mounted parts, and said dividing means is inserted between said at least two parts.

Claim 21

The mounting device according to claim 14, wherein said rigid inner portion has at least one groove therein for receiving said dividing means, said dividing means being rotatable, during assembly of said rigid inner portion, in said at least one groove in said rigid inner portion.