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From: "Steven W. Boese" <SBoese@uwyo.edu>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Crickets & progress
Thread-Topic: [FlyRotary] Re: Crickets & progress
Thread-Index: AQHOCFM1VbnIOpD9q0e6uQ9AJD2rXph0ujE1
Date: Mon, 11 Feb 2013 14:53:04 +0000
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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.  Th=
e mark on this upstream sensor is Denso 09M27-4350.  The Denso catalog numb=
er 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 t=
his sensor, but it is possible that it is capable of a more useful signal t=
han the rapidly changing Nernstian signal of a conventional O2 sensor when =
the mixture is stochiometric.  The sensor is more expensive than the univer=
sal Bosch 11027 O2 sensor, but the Renesis engine I got came with this upst=
ream air/fuel sensor still installed in the exhaust manifold.  If others ha=
ve 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 a=
ble 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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