Engine mountings
| Engine mountings |
| Background |
The balancer shafts work most efficiently in low engine speed ranges and become less efficient at high engine speeds.
In order to dampen the engine movement within this range, hydraulic engine mountings are used at the rear and front right of the engine. They work most efficiently between idling speed and around 1800 rpm.
The use of hydraulic engine mountings provides the following advantages:
| • |
Improved damping of horizontal engine movements during acceleration.
|
|
| • |
Improved damping of vertical engine movements on bumpy roads.
|
|
| • |
Reduction of structure-borne noise between engine and body.
|
|
| Description |
A hydraulic mounting comprises two chambers filled with a special damping fluid. Between the two chambers is a diaphragm and a passage, where the length and the cross-section area of the passage determines the damping characteristics of the mounting. The diaphragm is used to take up any forces caused by slight and abnormal engine movement.
The diaphragm is not able to withstand larger engine movement and the fluid will then be forced out of the upper chamber and into the lower chamber to attain even pressure. The damping characteristics of the hydraulic mounting will therefore change progressively, which means that their resistance will increase as the load increases.
This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
Our Friends
