[Diy_efi] Early Gasoline Fuel Injection

[bcroe at juno.com]

Mechanical fuel injection was used on WW II German 
aircraft and was an option on some late 50s GM engines.
Cadillac used a solid state electronic FI system on some 
cars starting with the 1975 500 engine.  All the above 
systems were analog in operation; in 1980 Cadillac 
switched over to a digital computer controlled EFI. 

The complex EFI systems used today were made possible 
by the invention and evolution of the microprocessor in 
the 70s.  The micro in turn depended on the invention of 
the integrated circuit in the 50s and the individual transistor 
before that in the 40s.  

Rumor has it a vacuum tube based EFI system was 
fielded in the 50s; I've never seen any substantiation of 
this.  In fact I've never seen ANY kind of portable vacuum 
tube system with remotely the computing power of the  
solid state systems mentioned above.  Another mechanical
FI system with a tube thrown in as an amplifier somewhere 
I could believe.

Bruce Roe

On Sun, 04 Aug 2002 02:00:37 -0400 Shannen Durphey 
<shannen at grolen.com> writes:
> Check archives for bendix efi released in '50s.  Yes, that's 
> E as in Electronic (although it's really vacuum tubes).
> 
> Shannen
> 
> Bobby Riggs wrote:
> > 
> > Actually the first EFI (electronic, by way of
> > transistors that is) was mounted to the 68 and
> > later Volkswagon Fast/Square/Notchbacks. Was
> > revised and rereleased in 68 for the Type 4
> > fast/square backs.  If you want to go WAAAAY back
> > there were systems by GM for the Caddy's and
> > Corvetts from '54... They were mechanical, then
> > there was Hilborn.  To say they came out at 1970
> > is more like "EVERY car had EFI" by 70 if it came
> > from Germany.

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