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

Turns oil into fine mist for spray lubrication
Returns cylinder head lubricating oil to the oil pan at high speed
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

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Automobile Engineering in ME
The rigid suspension is beneficial when

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

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