Originally Posted by swamp2
Not sure who the EDC supplier is, would like to know. This document
seems to imply BMW makes their own system with vendor supplied valves. This seems unlikely though, seems like a part BMW would buy from a supplier.
However, in any case the system works by a valve controlling the oil flow, either a coil or direct electrical type of valve. It is not a magneto-rheological fluid system nor does it contain permanent magnets.
If I remember correctly the supplier is ZF-Sachs and the system is called CDC (Continious Damping Control). Here's their description:
And yes, you're right, it works via a valve controlling/limiting the oil flow.
Originally Posted by lucid
I've seen this document, but there is no mention of the E92 M3 in there. There are refereces to the 5 and 7 series dating back to 2001. So, the EDC system used in the M3 might be a different design. The article I was referring to was saying that the magnetic shocks were going to be suplied by Delphi, and claimed were already in use in the Corvette and Ferrari. I haven't done the research to find out if that is true.
The "Aftersales Training" PDF
says that M3's EDC is based on the E65's EDC system. (p. 101)
Best regards, south