[Diy_efi] Project/temperature ranges

[Alex Ruiz]

"Why would GM find it necessary to use the 'automotive' range in their
ECM/PCMs? "

Maybe because their ECM/PCM needs to work in Alaska and somewhere else
in India where the ambient temp at night may be towards 44?C.


2007/2/27, gassr <gassr at charter.net>:
> I agree.
> Why would GM find it necessary to use the 'automotive' range in their
> ECM/PCMs? Asking about using 'automotive' range in automotive applications
> may sound silly, but it appears to be a question of using components with
> suspect (at least min.) parameters or going the
> distance on both ends, as even the 85?C range could be considered
> questionable for underhood temps.
>
> Gary
>
> ----- Original Message -----
> From: "Bill Lewis" <bill at wrljet.com>
> To: <diy_efi at diy-efi.org>
> Sent: Tuesday, February 27, 2007 8:50 AM
> Subject: Re: [Diy_efi] Project/temperature ranges
> >
> > It's really the low side that you might worry about in an
> > automotive application, since 0?C isn't very cold at all.
> >
> > Bill
> >
> > Joe Vitek wrote:
> >>
> >> Commercial range is 0? to +70?C. Industrial is -40? to +85?C. Automotive
> >> range is really tough at -40?C to +125?C.
> >>
> >>> How does the temp range for 'commercial' differ from 'automotive'?
> >>> I'm led to believe 'automotive' is designed to function within a wider
> >>> range of temp variation, with both a lower -?C and higher +?C. If so,
> >>> why deviate from automotive application norms?
>
>
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