Multi-link suspension - Revision history

Red marquis at 12:59, 24 February 2009

2009-02-24T12:59:09Z

← Older revision		Revision as of 12:59, 24 February 2009
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	In order to simplify understanding it is usual to consider the function of the arms in each of three orthogonal planes.		In order to simplify understanding it is usual to consider the function of the arms in each of three orthogonal planes.

	~~jOsNoR <a href~~=~~"http://vjeoqzpqtgol.com/">vjeoqzpqtgol</a>, [url~~=~~http://lizzqbpitopa.com/]lizzqbpitopa[/url], [link~~=~~http:~~/~~/ntsbefrngxii~~.~~com/]ntsbefrngxii[/link], http://uusyxkunzduw~~.~~com/~~		==Plan View==
			The arms have to control toe/steer and lateral compliance. This needs a pair of arms longitudinally separated.

	==Front View==		==Front View==

174.37.15.66: /* Plan View */

2009-02-24T12:47:37Z

Plan View

← Older revision		Revision as of 12:47, 24 February 2009
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	In order to simplify understanding it is usual to consider the function of the arms in each of three orthogonal planes.		In order to simplify understanding it is usual to consider the function of the arms in each of three orthogonal planes.

	==~~Plan View~~==		jOsNoR <a href="http://vjeoqzpqtgol.com/">vjeoqzpqtgol</a>, [url=http://lizzqbpitopa.com/]lizzqbpitopa[/url], [link=http://ntsbefrngxii.com/]ntsbefrngxii[/link], http://uusyxkunzduw.com/
	~~The arms have to control toe~~/~~steer and lateral compliance~~. ~~This needs a pair of arms longitudinally separated~~.

	==Front View==		==Front View==

Carguy at 16:07, 19 July 2006

2006-07-19T16:07:33Z

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	\| colspan="2" style="text-align:center;" \| [[Image:5linkM3Drear.gif\|200px\| ]]		\| colspan="2" style="text-align:center;" \| [[Image:5linkM3Drear.gif\|200px\| ]]

Carguy at 16:06, 19 July 2006

2006-07-19T16:06:03Z

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	\| colspan="2" style="text-align:center;" \| [[Image:5linkM3Drear.gif\|200px\| ]]		\| colspan="2" style="text-align:center;" \| [[Image:5linkM3Drear.gif\|200px\| ]]

PNiddy at 15:17, 19 July 2006

2006-07-19T15:17:49Z

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{| class="infobox bordered" style="width: 22em; text-align: left; font-size: 95%;"
|-
| colspan="2" style="text-align:center;" | [[Image:5linkM3Drear.gif|200px| ]]
|-
| colspan="2" style="text-align:center;" | [[Image:5linkM3Dtop.gif|200px| ]] Multi-link rear suspension of the 5-link type (rear view above, top view below) 
|-
|}

__NOTOC__
A '''multi-link suspension''' is a type of vehicle [[suspension]] design typically used in independent suspensions, using three or more lateral arms, and one or more longitudinal arms. These arms do not have to be of equal length, and may be angled away from their 'obvious' direction.

Typically each arm has a spherical joint (ball joint) or rubber bushing at each end. Consequently they react loads along their own length, in tension and compression, but not in bending. Some multi-links do use a swing arm or [[wishbone]], which has two bushings at one end.

On a front [[suspension]] one of the lateral arms is replaced by the tie-rod, which connects the rack or [[steering]] box to the wheel hub.

In order to simplify understanding it is usual to consider the function of the arms in each of three orthogonal planes.

==Plan View==
The arms have to control toe/steer and lateral compliance. This needs a pair of arms longitudinally separated.

==Front View==
The arms have to control camber, particularly the way that the camber changes as the [[wheel]] moves up (into jounce, or bump) and down into rebound or droop.

==Side view==
The arms have to react traction and [[brake|braking]] loads, usually accomplished via a longitudinal link. They also have to control [[caster angle|caster]]. Note that brake torques also have to be reacted - either by a second longitudinal link, or by rotating the hub, which forces the lateral arms out of plane, so allowing them to react 'spin' forces, or by rigidly fixing the longitudinal link to the hub.

==Advantages of Multi-link [[Suspension]]==
In its simplest form the multi-link [[suspension]] is orthogonal - that is, it is possible to alter one parameter in the suspension at a time, without affecting anything else.

This is in direct contrast to say a [[double wishbone]] [[suspension]] where moving a hardpoint or changing a bushing compliance will affect two or more parameters.

Advantages also extend to off road driving. A multi-link [[suspension]] will allow the vehicle to flex more, this means simply that the suspension will be able to move more easily to conform to the varying angles of off roading. This being said, multi-link equipped vehicles are ideally suited for sports such as rock crawling, and desert racing. A side note to the use of multi-link [[suspension]] use in desert racing, the use of a good sway bar is needed to counter body roll.

==Disadvantages of Multi-link [[Suspension]]==
It is very hard to optimise the geometry without a full 3d analysis, and compliance effects are important.

==See Also==
*[[Suspension]]
**[[Wishbone]]
**[[Double wishbone]]
**[[McPherson strut]]
**[[Torsion beam]]
**[[Semi-training arm]]
*[[Strut bar]]
*[[Torsion beam suspension]]

==External Links==

[[Category:Automobiles]]
[[Category:Auto parts]]
[[Category:Automotive suspension technologies]]