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Ed,
You would not have to supply an O2 sensor with your EFISM. You could just
make it accept either the 0-1, or 0-5v input. The customer could decide
which O2 sensor they wanted to use.
Bill
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Ed Anderson
Sent: Monday, February 11, 2013 10:50 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Crickets & progress
Thanks, Steve
I'll see if I can find out more about it. Ideally for my EFISM, I would
like to just have the 0- 5 volt input to deal with. An easy mod to the code
with just that, but if I have to do the PID control for temps then that
simply amounts to too much to incorporate into the code (or color me too
lazy {:>))
Ed
--------------------------------------------------
From: "Steven W. Boese" <SBoese@uwyo.edu>
Sent: Monday, February 11, 2013 9:53 AM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Crickets & progress
> Ed,
>
> The upstream sensor on the newer RX8's is called out as an air/fuel sensor
> as opposed to the downstream sensor which is specified as an O2 sensor.
> The mark on this upstream sensor is Denso 09M27-4350. The Denso catalog
> number is 234-9059. It is a four wire sensor with two of the wires
> apparently for a heater like a heated O2 sensor. The output has a 5V
> range from what I could find out. So far, I have not been able to find
> more specifics on this sensor, but it is possible that it is capable of a
> more useful signal than the rapidly changing Nernstian signal of a
> conventional O2 sensor when the mixture is stochiometric. The sensor is
> more expensive than the universal Bosch 11027 O2 sensor, but the Renesis
> engine I got came with this upstream air/fuel sensor still installed in
> the exhaust manifold. If others have this sensor also, it is a
> possibility that it could be used with minimal added expense. Someone
> with details of the RX8 emission system might be able to shed some light
> on this.
>
> Steve Boese
> RV6A, 1986 13B NA, RD1A, EC2
>
> ________________________________________
> From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of
> Ed Anderson [eanderson@carolina.rr.com]
> Sent: Monday, February 11, 2013 5:27 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Crickets & progress
>
> Thanks for the suggestion, Ernest
>
> However, the cost of the wideband sensor kits I found approach (or are
> more
> than) the total cost of the EFISM - so not feasible marketing wise. But,
> who knows - there are a bunch of them out there and I have not done an
> exhaustive search - yet.
>
> Ed
>
> --------------------------------------------------
> From: "Ernest Christley" <echristley@att.net>
> Sent: Sunday, February 10, 2013 8:07 PM
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Crickets & progress
>
>>
>> On Feb 9, 2013, at 6:27 PM, Ed Anderson wrote:
>>
>>> Great to hear about your move to the wide band O2 sensor, Tracy.
>>>
>>> I looked into modifying the EFISM to do the same, but found the PID
>>> control supposedly necessary to precisely control the heater element of
>>> the wide band sensor to be much more complex than simply extending the
>>> voltage range to interpret the WB output. Did you embed any PID control
>>> elements in the EC3 for temperature control - or just accepted any
>>> small?
>>> error associated with temp variations?
>>>
>>> Ed
>>
>> Ed, look at the LS1 line of Innovate sideband sensors. They have their
>> own computer that controls the heater, and it just puts out a 0-5V
>> corresponding to the F/A mixture.
>> --
>> Homepage: http://www.flyrotary.com/
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>
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