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Bill,
That may well be the case. I am curious as to why that sensor is called out specifically as an air/fuel sensor as opposed to an O2 sensor, why the output is 0-5 V as opposed to the 0-1 V of a normal O2 sensor, why it has 4 wires instead of 5 or more for wide band sensors, and why it costs $200 or more depending on who is selling it. Of course, you doesn't always get what you pay for.
Steve
________________________________________
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Bill Bradburry [bbradburry@bellsouth.net]
Sent: Monday, February 11, 2013 8:26 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Crickets & progress
Steve,
My 2004 Renesis came with a 4 wire sensor, but I think it is just a narrow
band sensor with a heater. I think the wires are heater and ground, and
sensor and ground.
Bill B
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Steven W. Boese
Sent: Monday, February 11, 2013 9:53 AM
To: Rotary motors in aircraft
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.
> --
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