Abstract: A hydraulic bushing forms a mount between a first component and a second component by including a spring portion connected between a core and an inner structure. The spring portion includes a first spring portion for defining hydraulic fluid cavities and a fluid channel extending between the cavities, with the cavities located about a first portion of the core, and a second spring portion formed of microcellular polyurethane about a second portion of the perimeter. The first spring portion and the second spring portion are located in parallel to one another. In this way, vibrations of a load transferred through the hydraulic bushing between the core and the inner support structure can be damped at a predetermined low frequency by the rubber with hydraulic fluid cavities, while still allowing for isolating of higher frequencies by the microcellular polyurethane portion of the spring.

Abstract: A spring seat isolator/damper is employed with a coil spring having flexible modes corresponding to frequencies of loading causing significantly higher dynamic stiffness amplitudes for the spring. The spring seat isolator/damper has an elastomeric member with a spring seat isolator portion and a mass damper portion, and with the spring seat isolator portion adapted to mount to and receive loads from a vehicle suspension. A damper mass operatively engages the mass damper portion of the elastomeric member such that the damper mass and the damper portion of the elastomeric member have a natural frequency that is substantially equal to at least one of the plurality of flexible modes of the coil spring. This damper, then, will substantially reduce the dynamic stiffness of the spring for that flexible mode.

Abstract: A hydraulic bushing forms a mount between a first component and a second component by including a first spring portion connected between a core and an inner support structure and a second spring portion surrounding the inner support structure. The first spring portion is formed of rubber and defines hydraulic fluid cavities and a fluid channel extending between the cavities, while the second spring portion is formed of microcellular polyurethane. The first spring portion and the second spring portion are located so they operate in series with one another. In this way, vibrations of a load transferred through the hydraulic bushing can be damped at a predetermined low frequency by the rubber with hydraulic fluid cavities, while still allowing for isolating of higher frequencies by the microcellular polyurethane.

Abstract: A hydraulic bushing forms a mount between a first component and a second component by including a spring portion connected between a core and an inner support structure. The spring portion includes a first spring portion formed of rubber and defining hydraulic fluid cavities and a fluid channel extending between the cavities, with the cavities located about a first portion of the core, and a second spring portion formed of microcellular polyurethane about a second portion of the perimeter. The first spring portion and the second spring portion are located in parallel to one another. In this way, vibrations of a load transferred through the hydraulic bushing between the core and the inner support structure can be damped at a predetermined low frequency by the rubber with hydraulic fluid cavities, while still allowing for isolating of higher frequencies by the microcellular polyurethane portion of the spring.