Since I'm not that great at describing things, I did some googling on "dual
mass flywheel," and here's one of the better links I've found. It's the
LuK website.
http://www.luk.com/content.luk.de/en/products/clutch_systems_new/zms_new/zms_new.jsp
I do wish, however, everyone would stop using the verb "dampen" and the
noun "dampener" to indicate the verb "damp" and the noun "damper." Am I
alone in this?