![]() | This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||
|
"Hydropneumatic" is too broad a term for what this page describes. I was going to move it to "hydropneumatic suspension", but the Citroën uses hydropneumatics for brakes and clutch as well.
The main point, though, is that "hydropneumatic" is a very general term. Mackerm 13:15, May 26, 2004 (UTC)
Whoever wrote the article has no idea why cars have damping, including those with the Citroen system, in which damping is provided by flow restrictors in the spheres. The idea that a non-linear spring cannot resonate is nonsense, as anyone who has ever watched a pendulum swinging through more than a small angle knows. We are told that increasing the loading leaves the spring rate constant in one paragraph, then in the next that the springing has stiffened up. All in all it reads like the ill-informed ravings of an enthusiast. About half this article needs thrown out as rubbish and the rest heavily rewritten. 87.113.37.249 ( talk) 20:58, 11 December 2012 (UTC)
This phrase means essentially nothing. Conventional steels vary in stiffness (Young’s modulus) by a good factor of six themselves, and nitrogen, as a gas, has no characteristic stiffness; gasses can expand infinitely and (within the range of pressures relevant here) can be compressed infinitely as well. The “stiffness” of a gas cylinder depends on the pressure within it; it’s meaningless to compare that to the ”flexibility” of a solid material, whatever that might be.
The whole second paragraph needs replacement, but I'm not sure what main point to highlight. —Preceding unsigned comment added by 65.38.32.131 ( talk) 10:43, 11 February 2009 (UTC)
I agree. The allusion is to the behavior of a cantilevered leaf spring. The internal friction in the leaf spring acts to damp its motion just like a shock absorber does. The natural vibration of a cantilevered leaf spring is a function of its density, internal friction and stiffness. But the spring's mass and internal friction are negligible compared to the mass it supports and the shock absorber's friction. The nitrogen in the spheres has a very low density (compared to steel) and low internal friction. Its spring rate, however, is a dynamic function of the load it carries. This nonlinear spring rate must be part of the reason a Citroën doesn't have a natural bouncing frequency. I'd welcome discussion on this. CharlieAndy ( talk) —Preceding undated comment added 20:08, 27 September 2010 (UTC).
That would require, at least, central tire inflation, like a military Humvee, but load dependent. Some cars, like the Renault R4, have wheels that don't change angles with load, but the load on the tires affects car handling. That is the main reason the DS had wider tires in front than in the rear and Porsches have wider tires in the rear than in front. David R. Ingham 03:39, 13 January 2006 (UTC)
I removed this link as it doesn't have any information about hydropneumatic suspension. Having produced a photobucket album containing jpeg images of a Citroen manual, a link was attached but removed. I will attempt to attach it again as I believe that much more can be learnt from this information. —The preceding unsigned comment was added by 202.43.226.11 ( talk) 12:14, 9 May 2007 (UTC).
Hi. As regards the list of car with hydropneumatic suspension: C4, Picasso and C8 are not equipped with hydropneumatic suspension but with classical. Rgds. François
Too much trivia for a technical subject and it needs cites;
Alastairward ( talk) 12:42, 16 September 2008 (UTC)
Hello fellow Wikipedians,
I have just modified 2 external links on Hydropneumatic suspension. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 10:53, 9 November 2017 (UTC)