A/C Refrigerant Flow Control

What methods are used by VW to regulate refrigerant flow? More specifically, what type of compressor is used? The sales literature says that the Passats, NBs and wagons use a variable displacement compressor. The other models specs don't list the compressor configuration. I'm assuming that they use a CCOT (cylcing clutch orifice tube) configuration. Or a flow control valve arrangement with a constantly running compressor. I've tried for 2 days to do a search on this subject but I keep getting a "too busy" message. Does any body know? I don't have an '01 NB service manual yet.

Ed

While driving I feel the compressor click on and off while the a/c button its self remains on constantly. Therefore I assume you are right, it's a CCOT model.

Variable displacements are cool, and seem to work better for idling long periods on the interstate, a popular pass-time in Utah! But probably too pricey for a base model Golf :-(