Date:         Thu, 6 Mar 2008 22:40:08 -0800
Reply-To:     John Bange <jbange@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Bange <jbange@GMAIL.COM>
Subject:      Re: 2.1 Electronic Idle Control valve
In-Reply-To:  <BAY125-F34D8FA82F3E8F899F2C65AA0120@phx.gbl>
Content-Type: text/plain; charset=ISO-8859-1

> The idle control valve is normally closed. When the idle speed goes below
> the set point, the ICU sends pulses to the valve to open it. The duration
> (duty cycle) determiens how much it opens bypassing the throttle to give
> more idle speed.


So it's just pulse-width modulation at 0 and 12 volts?  I'll have to pull
out my 555 timer chip project board and see if I can make it do something...


--
John Bange
'90 Vanagon - "Geldsauger"

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