Automobile Engineering in ME
The damper fluid leakage typically occur from

Bottom of damper
Clearance between inner and outer tubes of damper
Coil spring mounting
Upper damper mounting

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Automobile Engineering in ME
The function of an oil control orifice is that it

Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
Removes impurities from cylinder head lubricating oil
Turns oil into fine mist for spray lubrication
Returns cylinder head lubricating oil to the oil pan at high speed

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Automobile Engineering in ME
The rigid suspension is beneficial when

It is desired to have more flexibility in design
It is desired to improve tyre to ground contact characteristics
It is desired to reduce the unsprung mass
Large changes in load make it necessary to have a large suspension stroke

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