How Does Torsion/Twist-Beam Suspension Work? Why do Manufacturers use it?

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KYLE.ENGINEERS

KYLE.ENGINEERS

6 жыл бұрын

Today we look at a type of suspension commonly used on front wheel drive cars known as twist beam or torsion beam suspension. This suspension is largely used by manufacturers as it is very cost effective, however it has a number of interesting characteristics.
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Пікірлер: 143
@KYLEENGINEERS
@KYLEENGINEERS 6 жыл бұрын
Just realised after seeing the comments that I didn't talk about the unsprung mass at all! To answer everyone's questions, yes, this sort of setup does have higher unsprung mass than IRS, and this will adversely affect the handling unless your track is dead smooth. And regarding the roll damping, it is true that the dampers at the back of the beam will provide damping in roll, however as they have to provide bump damping against the springs you can basically tune them to either damp bump or roll best, or a compromise somewhere in-between. The damping will always be wrong in a specific mode, but close enough for most purposes. This isn't just a problem for a twist beam setup, but is true for any setup with an undamped anti roll bar, as changing the bump damping changes the roll damping.
@LukeTrundell
@LukeTrundell 5 жыл бұрын
I've been struggling to find information on KZfaq about roll stiffness and torsion bar suspensions and this video has very clearly told me as much as i would like to know about the characteristics and tuning techniques applicable to rear torsion bars so for that - thankyou very much sir ^^
@Devinfrbs
@Devinfrbs 6 жыл бұрын
Thank you! It makes sense why this suspension setup sometimes feels like the rear is upset over bumps. Keep up the good work.
@NDSno1
@NDSno1 Жыл бұрын
Thank you very much. I've been searching forever for the reason of toe change in Torsion Beam but can't find any that can be used, as the explaination is very vague and sometimes doesn't even get to the point. Your explaination is simple and sufficient, focus directly on the problem.
@Enakaji
@Enakaji 5 жыл бұрын
Nice video. What I've seen some manufacturers do to add more roll stability and a degree of adjustability to these kind of rear suspensions is add an adjustable torsion bar inside the twist beam so that you can adjust how rigid that twist beam is. I had one like that on my 1988 Mitsubishi Colt, though on my current 2007 Colt Mitsubishi kinda cheaped out on it and simply used a beefier twist beam and completely done away with the extra torison bar.
@fourthdalisay2542
@fourthdalisay2542 3 жыл бұрын
Men I'm 17 years old but I really learn a lot in this vids pls keep it coming!
@mjz2mjz92
@mjz2mjz92 3 жыл бұрын
You have explained the basic phenomena very simply. Thumbs up, Five Start. Keep it up !
@tsunami105
@tsunami105 6 жыл бұрын
Digging the non whiteboard
@CaniLupine
@CaniLupine 3 жыл бұрын
I know this is three years old, but I immediately recognized the underside of the car at
@animusfault
@animusfault 6 жыл бұрын
Good stuff. A multi-link video would be great.
@RHBTurbochargers
@RHBTurbochargers 3 жыл бұрын
you simply use shims between the wheel bearing and axle to change camber and toe
@adyyzels
@adyyzels 6 жыл бұрын
Great job,ive put anti roll bar to my torsion beam before,but it makes it less predictable.. After took it out my car handles much better in corners..
@viktortulbya2107
@viktortulbya2107 6 жыл бұрын
Im sorry off topic, but i have a question, sp ive heard formula 1 commentators mention red bull having some sort of "slippery" paint, do you know anything about that, and could paint type and or surfaces affect aero on a car?
@bradcomis1066
@bradcomis1066 6 жыл бұрын
This was great. I think it would be great if you did a video like this on the McStrut system that seemingly every contemporary vehicle is produced with. Why on earth is it so popular? It seems to me that it is horribly compromised in every way besides packaging. Is there really such a lack of space up front that dual A-arm suspension is impossible, or is it just a matter of saving dollars?
@dinostalieris3998
@dinostalieris3998
Perfect analysis, thank you! Just a question: if you add spring spacers to this type of suspension (in order to raise the ride height at the back), then the springs of the torsion beam are preloaded?
@samartz
@samartz 2 жыл бұрын
Always thought my pulsar sss had a solid axle, this cleared up many things. Many thanks!!
@rocketsurgeon11
@rocketsurgeon11 3 жыл бұрын
Alignments on this setup are done with shims behind the axle stubs.
@rsydn6317
@rsydn6317 2 жыл бұрын
as for someone who had this kind of axle as daily, few roll bars at rear really could compensate it twisty handling
@puremadmentalmackay
@puremadmentalmackay 5 жыл бұрын
you can add some extra stiffness to resist roll by adding gusset(?) plats between the centre of the H down the inside of the trailing leg and some FWD rally cars add adjustable rods from the inside centre of the H to the inside of the trailing leg to give toe adjustment and camber adjustment is done via either washers/shims or shim plates mounted between the torsion beam leg and the tub axle
@garagecedric
@garagecedric 6 жыл бұрын
What is more fascinating is that one of the best handling car you can buy uses a twist beam(the megane rs). But as always the complete system optimization is way more important than the specific components.
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