Engine mountings: Description

The hydraulic mounting has two chambers containing a special damping fluid. Interposed between the two chambers are a diaphragm and a passage, the length and cross-sectional area of which determine the dampening characteristics of the mounting. The diaphragm absorbs the forces generated by normal small movements of the engine. If engine movement is more pronounced, the damping action of the diaphragm will be insufficient. Fluid is then forced from the upper into the lower chamber, equalizing the pressure. This gives the hydraulic mounting a progressive damping action in that the resistance of the mounting increases with increased load.