What SU stands for

[mrvette]

just how complicated was this analogue computer?  what inputs did it use?  was
it based on silicon technology?  use chips?   what is an LVDT?  same as a MAP
sensor? did it have fuel injecters like what we see today?  GENE

Chris Rhodin wrote:
> 
> 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).
> 
> 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:
> >
> > 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....
> >
> > So the US manufatcturers had EFI in volume production in the late 1950s did
> > they?? you learn something new every day.
> >
> > 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,
> 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 that was a good system, but the technology is outdated now and parts are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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