Date:         Thu, 15 Oct 1998 16:22:28 -0700
Reply-To:     Ari Ollikainen <Ari@OLTECO.COM>
Sender:       Vanagon Mailing List <vanagon@vanagon.com>
From:         Ari Ollikainen <Ari@OLTECO.COM>
Subject:      Re: Fuel cutoff was:Wankels
Comments: To: Per Lindgren <lindgre@ONLINE.NO>, vanagon@VANAGON.COM
Content-Type: text/plain; charset="us-ascii"

At 12:09 AM 10/16/98, Per Lindgren wrote:
>Darrell Boehler wrote:
>
>> ----------------------
>> The digifant system turns off the injectors if the engine is above 1.5k rpm
>> and the throttle switch is in the idle position. This  saves gas in a way
>> that is not noticeable to the driver.
>> Darrell
>> --
>
>The real reason that the fuel is being cut off, is that unburned fuel will make
>its way into the cat, where the temperature is extremely high, the fuel will
>then be ignited inside the cat, ruining the whole thing. If you are lucky, it
>will only melt, unlucky, it will explode at the seam. Anyhow, a new cat will be
>needed, as these don't have 9 lives. Buying a new cat every time you went down
>a hill would be expensive.

        Thus a malfunctioning throttle switch which doesn't sense the
        idle position is a Bad Thing...


      OLTECO                    Ari Ollikainen
      P.O. BOX 3688             Networking Technology and Architecture
      Stanford, CA              Ari@OLTECO.com
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