[Gasification] Oxygen sensors for gasifier engines

[the_tinker1 at juno.com]

 Dear Tom, Andy and All:

An automobile computer from the pre-fuel injection days has the oxygen
sensor input
and an increase- decrease output signal.
 If the other unneeded inputs were simulated this might work for an
automatic mixture control.
The computers are available for about $15 at the U pull type auto parts
in Denver.
A 1986 300 Ford six like the one in your lab had one.
Some even have ignition advance and detonation sensing.
A throttle body could provide the actual valve.
Unfortunately I have 0 time for important things like this until next
summer.
Carry on
Gordon Anderson
the_tinker1(ä)juno.com
In Wisconsin
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>From: Thomas Reed <tombreed at comcast.net>
>We are developing small scale gasification power systems for biomass and

>use the 4 wire oxygen sensors to regulate air fuel ratio at the engine. 

>The 4 wire sensor is heated so that the output voltage won't vary with 
>exhaust temperature.  It gives a good signal, depending on air/fuel 
>ratio, 0-200 mV for lean, 400-1000 for rich.  

>In the feedback loop one needs a gas valve that can be controlled from 
>this signal.  We have built one, but does anyone know of a simple 
>inexpensive available valve for this?

>Thank,

>TOM REED       BEF
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