How Does This Work?

[peter 20]

Rear anti roll bar on a FIxed rear axle. Vauxhall etc

 

The anti roll bar is bolted to the axle in the centre with clamps then the ends of the anti roll bar are bolted to the end of the trailing arm. But the whole axle is solid. (The arb has been retro fitted)

 

So surely the anti roll bar can't work as if one side of the axle moves so will the other in the same direction as its all welded together.

[Tom Fenton 1,542]

The axle does flex, usually known as semi independent rear suspension.

[peter 20]

Ok, so I would assume that it doesn't flex that much. So fitting a ~22mm roll bar can't do that much as it won't move that much. Very little in comparison to the Peugeot setup?

 

Also if the axle/beam has been welded at some point it would effect the spring rate,

[peter 20]

Well not spring rate exactly...

[TooMany2cvs 65]

The axle does flex, usually known as semi independent rear suspension.

Yep, sounds like the usual cheap'n'cheerful torsion beam setup.

 

In effect, the whole rear suspension is an anti-roll bar itself. The second ARB just increases the force required to twist it.

[welshpug 1,657]

As above, the C2 uses a pretty similar setup, two trailing arms pivoting on angled bushes, with an U shaped sheet steel girder bolted between the trailing arms.

 

The Gravel R2 class rally cars used a 20mm ARB inside the crossmember, and the R2 max cars used a 23mm ARB.

 

Not quite the fully independent setup the saxo had however they do have an upright damper running much closer to the wheel ratio, so swings and roundabouts really.

 

207 307 308 208 and the mk3 partner, nemo etc used a similar arrangement.

Edited February 21, 2014 by welshpug

[peter 20]

 

Makes perfect sense now, Did not think the axle was designed to flex.

[calvinhorse 870]

It's all news to me too peter!

 

 

So glad I've got a beautifully designed peugeot!

Edited February 21, 2014 by calvinhorse

[peter 20]

It would appear that its not the best design, but I'm not qualified to say!

[Tom Fenton 1,542]

It's cheap and works well enough, many many small/medium front wheel drive cars use a similar setup.

[TooMany2cvs 65]

It's cheap and works well enough

<chuckle> Modern car design priorities, in a nutshell!

[Ryan_g1 9]

What's this in a Corsa/nova? I had one on my old. nova it made some difference.

[minimaniacwhyard 17]

They had a recall on bipper ones like that when I worked at pug because they kept cracking. Cheap indeed

[johniban 59 1 Cars]

They had a recall on bipper ones like that when I worked at pug because they kept cracking. Cheap indeed

 

yep we had it a citroen too!