[V8] Electricity and Fluids WAS RE: If you think Audi parts are expensive....

[Maurice Greven]

I worked at a VW shop in '78-'79.. Bosch K-Jetronic fuel injection uses a
high pressure fuel pump that is in essence a motor (WITH BRUSHES) and an
impeller at one end all encased in a metal housing with an inlet at one end
and outlet at the other. Yes folks, the gasoline flows RIGHT THROUGH the
electric motor and armature, brushes, and all then thru the impeller
(perhaps really a propeller) and out of the pump.  I changed one out on a
'70 VW type III and took it the old one apart and was AMAZED at this design.
I realize that gasoline (liquid) doesn't ignite (too easily) but what
happens if you start running out of gas and get an air/fuel mix being
stirred up in there??

I could imagine the owner manual. "Attention (Achtung) -- Running out of
fuel is bad for your fuel-injected Volkswagen. It could cause your vehicle
to unexpectedly explode. Please remain aware as to your fuel level." 

I must be wrong about the potential for this to happen. I can't imagine they
would let it out of the factory if explosion was a possibility...(Well, Ford
did it with the Pinto..HMMM)

Anyways, it's strange to have the gas flow thru the electric motor,
Maurice



-----Original Message-----
From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf Of
Scott DeWitt
Sent: Wednesday, May 16, 2007 4:38 AM
To: Dan DiBiase; cobram at juno.com; v8 at audifans.com
Cc: quattro at audifans.com
Subject: Re: [V8] If you think Audi parts are expensive....

Electricity takes the path of least resistance, so when you have a conductor

such as copper, in a pool of water electricity will flow through the copper 
conductor instead of the coolant.
Induction furnaces have used this for years.

----- Original Message ----- 
From: "Dan DiBiase" <d_dibiase at yahoo.com>
To: <cobram at juno.com>; <v8 at audifans.com>
Cc: <quattro at audifans.com>
Sent: Wednesday, May 16, 2007 6:02 AM
Subject: Re: [V8] If you think Audi parts are expensive....


> cobram at juno.com wrote: Spoke with a friend of mine today, he works at a 
> Mercyless Benz/Maybach
> dealership as a tech.  Swapped out an alternator on one today, a water
> cooled alternator.  When the alternator went out it took out some
> electronics in the instrument cluster.  Car is still under
> warranty....warranty repair submitted to Maybach.....$21,000.  Yep,
> twenty one thousand dollars.  Alternator is around $10k, cluster around
> $10k + $1k in labor.
>
> ---------------------
> A water cooled alternator? I dunno, combining electricity and water seems 
> strange to me. Another strange design is in my MGB - they put the heater 
> valve (which controls coolant flow into the heater) DIRECTLY above the 
> distributor. So when the valve goes, it leaks water onto the distributor. 
> Guess they did that instead of a warning light, because you definitely 
> know when your heater valve is leaking!
>
> Dan D
> '04 A4 1.8Tq MT-6
> Central NJ USA
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