hydraulic suspension

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sean sherry

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What a nice day we had on Sunday. Thanks for the inspection of your car Styria and the explanation of the suspension , sans springs. Still not understanding exactly how it worked I looked it up on the Net. Nitrogen filled Accumulators ala Citroen is the secret. And apparently it is a very good system. What other models have this system, and who thought of it first, the Germans or the French ? But then they have never settled their argument as to who built the first car........Sean
 

Styria

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Yes Sean, it was nice to meet up with you again. I don't think you had any problems fitting in nicely and thank you for that.

On mass produced cars, Citroens were the first to utilize a full hydraulic suspension system - as far as I know. Prior to the 6.9 hydropneumatic system, the W111/112 and W109 cars of the '60s and '70s used an air suspension system - probably somewhat easier to maintain than the later hydrpneumatic. In 1979, the 6.9s commanded a premium of 69K. German Marks, with the 450SEL M117 engined coming in at $45K. - 450SE - $40K. So you can see that the 6.9 engine, plus the hydraulic system, commanded a huge increase considering that the bodies were about identical, as were the gearboxes (small variations) as well as diffs and running gear (again very small variations).

When you then come to the '80s, the full hydropneumatic was then utilized, to special order, on the 560SELs. As a matter of interest Sean, the latest McLaren MP4PC (?) also employs a quite similar hydraulic system to activate its suspension. Regards Styria

N.B. There is a very comprehensive explanation of the McLaren system in another section of TK.
 
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Oversize

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The 380s and 500s from 1980 could also be optioned with HPF. Not sure if you could option up a later 420, but definitely the late W126 500SEL and 560SEL.
 

Oversize

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I’m not 100% sure, but possibly the W129 500SL could be optioned with a version of the system with active features.
 

Oversize

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I also believe several models of the Lexus 4x4 also feature hydro & some of the systems were developed in WA
 
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