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    Thread: Independent suspension. Does it improve ride quality?

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      Independent suspension. Does it improve ride quality?

      Does independent suspension at the rear imporve ride quality? Pls point out the advantages and disadvantages.
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      Yes, IRS (independent rear suspension) will give you better ride quality and will improve your handling characteristics due to the lower unsprung weight and also because each wheel has the ability to act independently (be it soaking up the bumps or potholes), irrespective of what the other wheel is doing.

      I haven't as such come across any such disadvantages expect maybe the cost factor?

      I am guessing the Getz is running a dependent Torsion beam axle at the rear? If so, it does have a lot of disadvantages mainly pertaining to handling because of the following reasons.

      1. You have additional mass from the beam connecting the two wheels.
      2. Since both the wheels are connected to each other, the force acting on one wheel is bound to get transferred to the other and this reduces stability.
      3. Lastly, due to the relatively higher mass of the axle and since both the wheels are connected there is no ride isolation between the sprung and unsprung masses. Which is the primary factor for the rough ride.

      Btw does the Getz have a Panhard bar?
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      And can anyone explain as to how Rear Wheel driven vehicles can have Independent suspension because i have always seen the transmission thinggy connecting the rear wheels.
      Car - Hyundai Getz CRDi GVS - 2009
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      Quote Originally Posted by [url=http://gearheads.in/post28958.html#p28958
      shyam ยป Sun May 09, 2010 10:48 am[/url]]And can anyone explain as to how Rear Wheel driven vehicles can have Independent suspension because i have always seen the transmission thinggy connecting the rear wheels.
      Rear wheel drive vehicles can have IRS like front wheel drive vehicles can have IFS.

      Rear wheel drive vehicles may have a multi link rear suspension or it may have double wishbone suspension or may have mcpherson strut type suspension. Only these three come to my mind now. They can be designed in such a way to leave space for the axle (similar to FWD) to pass through. Some even used swingaxle (Merc gullwing) but that was said to have its share of handling issues.

      How it works, the rear differential sits on a subframe which is attached to the monocoque/chassis. Axles which connect the wheels to the drivetrain have universal joints which allow the up and down movement of the wheel but differential stays put.

      Torsion beam is semi independent, forces acting on one wheel is not entirely transmitted to the other wheel, unlike the 3 link non-independent setup we have on Alto/Astar/Zen/Santro/Matiz and other similar cars. Torsion beam, connecting the trailing links at either sides, is not a solid rod of metal, it's a C-section beam and it flexes.

      Here most hatches and midsize sedans roll out with torsion beam now, even a good handling vehicle like Fiesta has it.

      Getz doesn't have a panhard bar. Torsion beam type suspension don't have a panhard bar. 3 link type suspension does, panhard bar does the lateral location of the axle.

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