How Multi-link Suspension Works

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Here's how a multi-link suspension works on a passenger vehicle.

The multi-link suspension is an advanced suspension design that consists of a series of links or suspension members that attach the wheel carrier to the vehicle body. The purpose of the suspension system is to 1) support the weight of the vehicle, 2) maintain good tire contact with the road and 3) provide good ride comfort and handling for the vehicle's occupants.

In this video, a typical four and five link independent suspension is demonstrated as a 2004 Infiniti G35 sedan is taken apart piece by piece as an example. Parts are removed from the vehicle and cut apart, including the vehicle sub-frame, control arms, wheel carriers, knuckles, brakes, bearings, springs, struts, stabilizer bars, end links and drive line to study the scientific role of each and every component in the multi-link suspension. A discussion of wheel alignment parameters, such as scrub radius, steering axis inclination, toe, camber and caster and its affects on vehicle dynamics follows.

The multi-link suspension differs from the McPherson and Double Wishbone suspension systems, which are covered in this video:


The double wishbone is a 3 link fixed variant of the multi-link design, while the McPherson utilizes the strut as 3 members in addition to supporting vehicle weight. Other suspension types include leaf spring, push rod, solid axle and torsion beam designs.

Here's where you may purchase the tools used in this video:
Colgate Toothbrush:
(Canada)
(US)
Impact wrench:
(Canada)
(US)
Control arms:
(Canada)
(US)
Stabilizer links:
(Canada)
(US)
Impact socket set:
(Canada)
(US)
Axle nut socket:
(Canada)
(US)
Impact Universal Joint:
(Canada)
(US)

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