The BMW engine is an electronic system and does have a limp-home mode. I
couldn't say how long the system would run on the battery alone. The
fuels pressurization pump is probably what uses the most juice. BMWs
typically have a 32 amp-hour battery, but in my experience the battery
was always the weak link in the system. I used to have to replace my
battery about every 18 months.
> -----Original Message-----
> From: Brian Rauchfuss - PCD [SMTP:brauchfu@pcocd2.intel.com]
> Sent: Tuesday, March 03, 1998 08:42
> To: europa@avnet.co.uk
> Subject: BMW Fuel Injection
>
>
>
> There is a discussion going on in rec.aviation.homebuilt on fuel
> injection,
> in particular the reliability of electronic fuel injection vs
> mechanical
> fuel injection.
>
> Does anyone know if the BMW engine uses electronic or mechanical fuel
> injection? If electronic, does it have a "limp home" mode if one of
> the sensors fails? How long can the battery keep the EFI going if
> there
> is an alternator failure?
>
> These rah discussions give me something to think about while I fiddle
> with
> my tailplane closeouts!
>
> Brian
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The BMW engine is an electronic system and does have a limp-home mode. I
couldn't
say how long the system would run on the battery alone. The fuels pressurization
pump is probably what uses the most juice. BMWs typically have a 32 amp-hour
battery, but in my experience the battery was always the weak link in the
system. I used to have to replace my battery about every 18 months.
-----Original Message-----
From: Brian Rauchfuss - PCD [SMTP:brauchfu@pcocd2.intel.com]
Subject: BMW Fuel Injection
There is a discussion going on in rec.aviation.homebuilt on fuel injection,
in particular the reliability of electronic fuel injection vs mechanical
fuel injection.
Does anyone know if the BMW engine uses electronic or mechanical fuel
injection? If electronic, does it have a limp home mode if one of
the sensors fails? How long can the battery keep the EFI going if there
is an alternator failure?
These rah discussions give me something to think about while I fiddle with
my tailplane closeouts!
Brian
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