I believe he was indicating that was the set-up on his old land cruiser gas
engine.
Robert

----- Original Message -----
From: "Larry Alofs" <lalofs@RCN.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, April 29, 2004 3:26 PM
Subject: Re: Diesel AC question. WHat triggers the clutch?

> I don't claim to be an AC expert, but I have never heard of such a
> switch and have not encountered one in the 4 or 5 systems that I have
> worked on.
>
> I believe that in the original Vanagon diesels the solution was simply
> to not put AC in the diesels.  ;-)  Too little HP.
>    In the 2.1 L Vanagons the idle speed controller and the ECU give it a
> little more gas when the AC is on.  If your AC turned off at idle, it
> wouldn't be worth much when stuck in traffic jams in the summer.
>     Perhaps someone else can tell us what the approach is in the new
> generation of VW diesels.
>
> Larry A.
>
> Matthew wrote:
> > I am helping a friend convert a gas-powered land
> > crusing to a diesel powered land crusier. check out
> > this link for his details, insane what he has done:
> > http://forum.ih8mud.com/index.php?board=21;action=display;threadid=13204
> >
> > Anyways, the old (gas engine) ac system has a switch
> > that is triggered by a pulse coming off the
> > distributor, so it knows at what rpms to shut off the
> > AC compressor. Diesels don't have a distributor...
> >
> > So, on vw diesel engines, what controls the compressor
> > clutch? Is there an automatic switch that will turn on
> > and off the magnetic ac compressor clutch when the
> > engine rpms are too low? How does the vw diesel setup
> > work for ac?
> >
> > thanks
> > matthew
> >
> > =====
> > Matthew Pollard         "Racing with the wind and flirting with death
> > Dept. Of Chemistry     So have a cup of coffee and catch your breath"
> > University of Idaho
> > www.ftir.chem.uidaho.edu
> >
> >
> >
> >
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