Engineers discuss the S class

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Mercmad
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Engineers discuss the S class

Post by Mercmad » Fri 14 Sep, 2018 7:51 pm

https://youtu.be/ihNVOLOuo7M Starts with a Nice 6.3

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Bartman4800
300 SLR
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Re: Engineers discuss the S class

Post by Bartman4800 » Tue 02 Oct, 2018 10:42 am

Very enlightening:

The engineers concluded that the air suspension in the W109 (and probably W112) was transferring the high frequency bumps too much, which was one of the reasons to revert back to steel suspension (with or without level adjustment)
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

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TheMadRacoon
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Re: Engineers discuss the S class

Post by TheMadRacoon » Tue 02 Oct, 2018 11:47 pm

Sudden thought: is that why Citroen took the hydraulic route? No idea (always struggled with vibration analysis...should have paid more attention in lectures!)

By the way, does the air suspension on W109 and W220 provide the damping function too or are there separate dampers? And do W116 6.9s have air suspension or hydraulic/air similar to Citroens (not that I know much about Citroen suspension design either!)

Always learning, though :-)
Emad,
TheMadRacoon
1975 350SLC Astral Silver (725) / Blue (2012, 284,900 km - present.... a real Benz, getting better and better)
1988 190E Deep Blue (900) / Cream (2006, 190,000 km - 2007, ~ 215,000 km .... FSH and still spent big $$$)
1974 280E Reed Green (860) / Bone (1993, 316,700 km - 2004, ~490,000 km and still A1)

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Bartman4800
300 SLR
Posts: 1968
Joined: Fri 10 Oct, 2008 12:10 am
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Location: Perth WA

Re: Engineers discuss the S class

Post by Bartman4800 » Thu 04 Oct, 2018 3:19 pm

Citroen is different because they want to be :)

Could be that they learned from MB, but the 2 have very little in common. When the DS came out 1956? The MB system was not on the market yet.

On the W112/W109 the springs have been replaced with air bellows. It still uses the same ordinary dampers. That is why it is so easy to convert back to steel springs.
On the W220, there is computer control and whatnot. Like the engineer said: the only thing in common is the air...


The Citroen system actually uses a very small volume, filled with compressed nitrogen as a spring, and they use the hydraulic system for level adjustment and damping.


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

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TheMadRacoon
C 111
Posts: 850
Joined: Sun 25 Nov, 2012 11:34 am
Model you own: w107
Location: Melbourne

Re: Engineers discuss the S class

Post by TheMadRacoon » Thu 04 Oct, 2018 9:04 pm

Thanks Bart.

BTW Love your Finnie. Only been in one, that was end 1981. It felt so strong, and you sat so high. And that view over the bonnet! Never been in a DS but could see both in my garage.
Emad,
TheMadRacoon
1975 350SLC Astral Silver (725) / Blue (2012, 284,900 km - present.... a real Benz, getting better and better)
1988 190E Deep Blue (900) / Cream (2006, 190,000 km - 2007, ~ 215,000 km .... FSH and still spent big $$$)
1974 280E Reed Green (860) / Bone (1993, 316,700 km - 2004, ~490,000 km and still A1)

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