Electromagnetic suspension. All about the principles of its operation. 

Would your concept work on lightweight vehicles and if so i would love to hear more

We all have our preferenses about cars, the reasons for introducing new systems vary, economics, reliability in the long run, repairability, actual benefits and so on. In a situation when electric cars are being instroduced, the energy efficiency becomes more important as well as aerodynamics, recyclability and so on. Citroen has abandoned their fantastic system, probably due to cost, energy efficiency and the fact that a high pressure (90-140 atm) oil system will inevitably start to leak in the long run. It may also be a way to avoid criticism from environemntalist fanatics because of its oil contents. I will forever miss the best suspension system ever, as i am driving a Citroen C5 gen 3 with hydractive 3+. It works fantasticly well, and has done so since 2011. Before that i had 2 XM V6 with hydractive 1 and 2. But It needed some amount of power from the engine, and today range seems more important to customer.

RR, Bentley, and Citroen have all abandoned the hydropneumatic suspension, as it’s old technology. Most use air suspension, with RR specifically using an added rubber damper system for high-frequency vibrations. No production car has used this system as it was deemed “too heavy and expensive for commercial vehicles”. The only problem is, it makes things such as speed bumps obsolete, and cars can literally jump up curbs, etc... That’s the real reason I believe it was never used.

I agree that the Hydropneumatic systen was eventuellt downgraded on newer Citroen as a mean to löser complexity and thereby cost. A new oil, LDS replaced LHM and brakes were replaced with a cheaper Peugeot 508 system. But it was produced until 2015 when C5 mk 3 ended its produktion cycle, to the disappointment of many fans. As energy efficiency demands increased and electric cars became more common and sportiness became more popular than confort as a means to deal with Swedish "moose avoidance test" it have been fewer luxury suspension systems on the market. Citroen skipped automatic levelling for their cars, leaving just softer ride with a PHC system that is available with an active version. To some degree the have still kept oil as a suspension media. So, not abandoned, but simplifified for cost reduktion;-)

@@TheFakeNewsFrog I do believe that combination of factors contributed to the non acceptance of the suspension: the 2008 economic crises; the opposition and pressure by the cartel that dominated the industry that supply auto parts; and the weight and cost of the suspension, which could be solved fairly easy.

Can you write a few examples?

It uses electromagnets too, but yeah not straightforwardly