New 42Volt systems

[Shirley, Mark R]

This figure was given to me before the multiplexing started.  It was 500
lbs.
I was a wiring harness guy for Ford, and I can tell you it's way more than 
50 lbs even on the little cars.

-----Original Message-----
From: romans at starstream.net [mailto:romans at starstream.net]
Sent: Wednesday, January 24, 2001 10:55 AM
To: diy_efi at diy-efi.org
Subject: Re: New 42Volt systems


I bet it's closer to 50 lbs.  GM uses serial data lines to connect
all the devices to save weight.
I have seen the harnesses laying out on the ground and I could
easily pick up the whole thing.
Mark
----- Original Message -----
From: "Shirley, Mark R" <MarkRShirley at eaton.com>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, January 24, 2001 5:24 AM
Subject: RE: New 42Volt systems


> That's the primary reason.  Weight.  I heard from a buddy at CLCD
(cadillac
> engineering)
> that the typical Cadillac has 500lbs of wire on board.  Secondary benefits
> are you can
> run power hungry devices such as solenoids that push open valves.
> And to the guy who said something about F1 cars using this, I doubt it was
> electric solenoids.
> Maybe a oil/electric hybrid.  I've seen em.  Even the 42V jobs are huge.
> 12V would be like a
> coffee can on each valve.  With 1/0 wire going into it!
>
> -----Original Message-----
> From: James Montebello [mailto:jamesm at lapuwali.com]
> Sent: Wednesday, January 24, 2001 3:29 AM
> To: diy_efi at diy-efi.org
> Subject: Re: New 42Volt systems
>
>
>
> Higher voltage for the whole system means less current for the same power
> (wattage).  Wire gauge is based on current, not power or voltage, so with
> less current you can use thinner, lighter wiring and connectors.  Wiring
> harnesses weigh a lot, and are getting more complex all the time.
>
> james montebello
>
> On Wed, 24 Jan 2001, Wes Branchflower wrote:
>
> > Why dont they just bring the 12 upto 42volts with an invertor for the
> > electronic valves instead of upgrading the whole system to 42volts, or
is
> > their other reasons?
> > So their will be 42Volt batteries in cars soon?
> > I wonder why they chose 42volts?
> >
> >
> >
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