9000 CDE V6-2962cc 3.0L DOHC (B308) (1995)
Engine Mount: Description and Operation
BACKGROUND
To provide effective dampening of engine movement, the rear and both the right-hand front mountings are of hydraulic type. Their maximum
dampening effect is between idling speed and about 1800 rpm. The use of hydraulic mountings has the following advantages:
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Improved damping of horizontal engine movements during acceleration
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Improved damping of vertical engine movement on bumpy roads
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Improved damping of engine movement when idling
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Reduction of structure-borne sound between engine and body.
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, which means that the resistance of the
mounting increases with increased load. The gearbox attachment is different for automatic transmission and manual gearbox.