Engine mountings: Description

The hydraulic mounting consists of two chambers filled with a special damping fluid. There is a diaphragm and a passage between the two chambers where the length and cross-sectional area of the passage determines the damping characteristics of the mounting. The diaphragm absorbs the forces generated by the normal small movements of the engine.

The affect of the diaphragm is not sufficient to dampen more pronounced engine movement. Fluid is forced from the upper chamber to the lower chamber, equalizing the pressure. This gives the hydraulic mounting a progressive damping action, resulting in increased resistance with increased load.