Engine mountings: Description

The hydraulic cushion comprises two chambers filled with a special glycol-based damping fluid. Between both these chambers is a diaphragm and a passage, where the length and cross-sectional area of the passage determines the damping characteristics of the cushion.

With bigger engine motion the damping capacity of the membrane is not sufficient, fluid is forced from the upper to the lower chamber and a pressure equalization occurs. The damping characteristics of the hydraulic mounts are in this way progressive, which means that the resistance from the mounts increases with increased loading.