Electric water pumps (was) alt charging cont sw

[Gary Derian]

I believe the compressor has a variable pitch swash plate that is controlled
by inlet suction, it will only suck so hard so it cuts back when the cooling
load is low.  There is no electronic interface.  From a power consumption
standpoint I don't think this is any better than cycling the compressor, but
it does let the truck drive more smoothly.  My old '89 Dodge minivan with
the Mitsubishi V-6 had a similar compressor.

Gary Derian <gderian at oh.verio.com>

>>Yeah, was looking for a book with info.  Seem to remember something
>>about high side pressure acting on a plate that effectively reduces
>>the size if the cylinders.  Pretty vague.  If you're curious I'll see
>>if I can dig something up tomorrow.  It's 2 am and I've got an
>>interview at 9.
>>Shannen
>
>Yeah--that would be interesting--
>
>Thanks. And good luck with interview, if that's what is needed!
>
>Regards, Greg
>>
>>Greg Hermann wrote:
>>>
>>> >>
>>> >> There are variable displacement refrigeration compressors available
>>> >> (usually screw type),
>>> >GM uses V5 variable displacement compressor on many late model cars.
>>>
>>> Well--a variable displacement compressor is an even better deal than
using
>>> an EPR valve!
>>>
>>> Greg
>