[Vwdiesel] Engine Lineage

[James Hansen]

I'm told by the local Bosch shop guys that I know pretty well that they can
make a constant speed from a variable speed and vice versa.
That was a few years ago mind you when some of the older hands were still
there, but basically, It should be do-able.
-James

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]On
Behalf Of Lee Hillsgrove
Sent: Saturday, January 01, 2005 9:58 PM
To: vwdiesel at vwfans.com
Subject: Re: [Vwdiesel] Engine Lineage




  I have the green Bosch diesel fuel injection book and the yellow VE pump
booklet here.

 There is a difference in the governors. They describe them as being a
"min-max" and "variable speed" governor - autos use the min-max. This allows
the governor to control the idle and maximum speeds, with your foot
regulating everything in-between. If you come to a hill, the speed "droops"
and you have to increase the fueling with your foot. This is desirable for
mobile applications. The industrial engines use the variable speed governor,
in which all speeds between minimum and maximum are closely governed. While
this might seem to be a good choice for a car, it would leave much to be
desired, especially in slippery conditions. Once you set a speed with your
foot and you wanted to speed up slightly, you would change the position of
the throttle lever just slightly with your foot. An automotive governor
would respond by slightly increasing the position of the control collar; if
that was not enough, you'd slightly increase the position of the throttle
lever until the desired amount of acceleration was delivered, or you ran out
of engine power delivery.
 With the stationary engine's governor, any deviation from the rpm set by
the throttle lever's position would result in a very large response in the
position of the control collar, until the rpm returned to a level
corresponding to the position of the throttle lever. In other words, a
slight movement in the accelerator pedal would be the same as putting it
right to the floor until the engine speed caught up with where the pedal was
set. In lower gears, such as at parking lot speeds in 1st, this would be,
shall we say, less than graceful.
 Looking at the simplified illustrations, it would appear that there is some
difference in the number and location of the springs as well as some linkage
differences. The book does not say, but I would guess a pump rebuilder would
be able to source the correct governor bits and rebuild an auto pump for
industrial duty, or vice-versa. Just an assumption on my part, though.

HTH,

Lee
Oo-v-oO
PP-ASEL
KB1GNI



----- Original Message -----
From: "Sandy Cameron" <scameron at compmore.net>
To: <vwdiesel at vwfans.com>
Sent: Saturday, January 01, 2005 12:56 PM
Subject: Re: [Vwdiesel] Engine Lineage


> At 02:57 AM 01/01/05 -0500, Val  wrote:
> >>
> > I can say that the industrial 1.488 diesel sure looks like the
> > 1.5 NA.  Oh, another difference.  The Bosch injector pumps
> > were configured so that the "throttle position" was really
> > an RPM setting.  I'm sure it was a different injector pump,
> > although it looked the same.
>
>
> OK----- Challenge to the pump gang ! !
>
> What's the difference??
>
> If there is ANY way to change the car pump to a speed governing pump, I
need
> to know, for the volksgen project
>
> List VE pump web sites, is the constant speed one a VE or something else?
> Does someone have a VE manual that describes the difference?
>
> I,m going to try my local Bosch injection shop and see if they know, and
if
> they would convert one. The guys there are friendly and let me wander
> through the shop. Also sold me a pump shaft seal at his cost.
>
> Sandy
>
> _______________________________________________
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
> http://www.audifans.com/mailman/listinfo/vwdiesel
>


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