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Date:         Sun, 4 Feb 2001 16:09:51 -0600
Reply-To:     Larry Alofs <lalofs@ENTERACT.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@ENTERACT.COM>
Subject:      Re: Lamda ?
Content-Type: text/plain; charset=us-ascii

pensioner wrote:

> Hmmm...just how does the sensor sniff the ambient air? WRT ambient air vs > O2 in exhaust note. > > I seem to recall the Lamda sensor is a voltage generating device whose > output varies proportionally to the amount of oxygen in it's immediate > vicinity. <1mm from the surface. > > Or it could just all be a guess. I've never actually seen an electron, have > you? > > pensioner (sorry I missed friday)

The Bosch manual (p.22) shows a cutaway view of a sensor. There is a vent opening at the back near the wire which lets air in, so that the hollow sensing tip is exposed to ambient air at its inside surface and the exhaust at its outside surface.

Bosch Fuel Injection & Engine Management Charles O. Probst, SAE

ISBN 0-8376-0300-5 Bentley Stock No. GFIB '91 edition

Should still be in print. Highly recommended (by me anyway).

Larry A. Chicago


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