Automobile Engineering in ME
The main feature of Macpherson strut suspension is that

Non vertical external forces are supported by the suspension arms
The assembly is slightly more complicated in design
The unsprung mass in lighter
The vertical size of the suspension can be made more compact

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Automobile Engineering in ME
The basic function of the suspension is to

Automatically correct the effects of over steering
Ensure that the steering wheel can deliver a suitable amount of steering force
Absorbs vibration and impact forces from the road surface
Ensure that wheel alignment is not disturbed during driving

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