What SU stands for

[Chris Rhodin]

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My 1972 Renault R-17 had Bosch D-Jetronic fuel injection in it.  This =
was an all electronic (with the exception of the thermo-time switch) =
system that I've seen in VWs from the late-sixties.  It used an LVDT to =
measure the manifold pressure and an analog computer to set the pulse =
width, the distributor had an extra set of contacts that provided timing =
information to the computer.  By the mid-seventies Bosch had moved away =
from the electronic systems in favor of the mechanical CIS systems.

As far as I know this is the earliest all electronic FI produced in =
volume (emphasis on volume). =20

Chris

----------
From: 	mrvette
Sent: 	Wednesday, July 08, 1998 14:05
To: 	diy_efi at efi332.eng.ohio-state.edu
Subject: 	Re: What SU stands for

Mike Morrin wrote:
>=20
> At 07:26 8/07/98 -0400, mrvette wrote:
> >.....the only
> >ones who showed the slightest talent in the electronics field were =
the
> Germans,
> >and they were about 10 years behind us....
>=20
> So the US manufatcturers had EFI in volume production in the late =
1950s did
> they?? you learn something new every day.
>=20
> Mike


Detroit has always been interested in electronics, much more so than
others...Bendix electro-pulse...with Chrylser,  wouldn't run long, =
rushed into
production too soon,  based on current tech of times....Germanium
transistors....bad stability...no good..in time...
worked for a few months, then was too unstable to get reliability...

GM gave Bendix in Newport News Va.  some Caddy engines to work with, =20
around the earliest 70's...and the result was that analogue early =
proprietary
silicon chip based system on the Sevilles mostly and a very few other =
caddys....

that was a good system, but the technology is outdated now and parts are
NLA...but it's only been 25 years....:-)))

so then the advent of modern computer chips...the rest is history....

Now where do the germans fit into this early work.....OH yeh the old =
mechanical
type   sort of like that old Rochester on the vettes...

the Datsuns had some systems out in the late 70's   similar to the caddy =
system
as I recall...been a while since I worked with one of them....

GENE


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