Engine mounting: Description

The hydraulic engine mount consists of two chambers filled with 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 damping characteristics of the mount. The diaphragm absorbs the forces generated by the 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 mount a progressive damping action, which means that the resistance of the mount increases with increased load.