From: "Steven W. Boese" <flyrotary@lancaironline.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: controller, sensor, wiring questions
Thread-Topic: [FlyRotary] Re: controller, sensor, wiring questions
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Date: Tue, 3 Jun 2014 16:36:19 +0000
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Charlie,=0A=
=0A=
I have connected two devices to a narrow band O2 sensor in addition to the =
EC2 with good results.  The devices have to have high input impedance.=0A=
=0A=
I don't have an EM device, but others have connected both the data in and o=
ut lines to the EC2/3 to the serial converter for the data logging and obse=
rvation and Ed's EFISM with a double pole double throw switch.  Only one of=
 the systems can be used at a given time.=0A=
=0A=
For the CAS, I used the same connector as for the fuel injectors.  It requi=
red the pins in the CAS to be bent into a slight offset.  The arrangement h=
as been working for the two CAS on my test stand for some time now without =
any problems.=0A=
=0A=
The exhaust manifold O2 sensor on my 2009+ Renesis is a four wire wide band=
 sensor which uses a different control system than the aftermarket wideband=
 sensors I've seen.  The O2 sensor further downstream is a narrow band sens=
or.  The pre-2009 Renesis may be different, though.=0A=
=0A=
Using switches with excess current capability for the fuel injectors doesn'=
t seem to be a bad idea.  Dennis probably can give you some direct feedback=
 on this.=0A=
=0A=
Steve Boese=0A=
RV6A, 1986 13B NA, RD1A, EC2=0A=
________________________________________=0A=
From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of =
Charlie England <flyrotary@lancaironline.net>=0A=
Sent: Tuesday, June 03, 2014 7:50 AM=0A=
To: Rotary motors in aircraft=0A=
Subject: [FlyRotary] Re: controller, sensor, wiring questions=0A=
=0A=
I've got two sensors off RX-8 exhaust manifolds, so money shouldn't be=0A=
an issue. However, apparently on the EC3 supports wide band sensors; the=0A=
latest EC2 will do auto tune with a narrow band sensor but doesn't=0A=
support wideband.=0A=
=0A=
If I can use the RX-8 sensor & it will still work as a narrow band to=0A=
feed the EC2, that would be great. Do you have a link that describes=0A=
hooking one up to do both wide & narrow band?=0A=
=0A=
Thanks,=0A=
=0A=
Charlie=0A=
(BTW, I'm aware that the inrush current to the injectors is much higher=0A=
than steady state, but I'd think that it would be of incredibly short=0A=
duration, so average load on the contacts should be very low.)=0A=
=0A=
On 6/3/2014 7:43 AM, Bobby J. Hughes wrote:=0A=
> Also most wide ands also have a narrow band output for other devices.=0A=
>=0A=
> Bobby=0A=
>=0A=
> Sent from my iPhone=0A=
>=0A=
>> On Jun 3, 2014, at 7:39 AM, "Bobby J. Hughes" <flyrotary@lancaironline.n=
et> wrote:=0A=
>>=0A=
>> I think Tracy's latest upgrade support wideband o2 auto tune without the=
 EM. Skip the narrowband and save some fuel $ during tuning. Your fuel savi=
ngs will more than pay for the wideband and it's more useful in flight.=0A=
>>=0A=
>> Bobby Hughes=0A=
>> Sent from my iPhone=0A=
>>=0A=
>>> On Jun 3, 2014, at 6:12 AM, "Ed Anderson" <flyrotary@lancaironline.net>=
 wrote:=0A=
>>>=0A=
>>> Charlie, I'm a bit behind the times on Tracy's EC2 - but, last I knew i=
t did not have an auto tune feature (my info could easily be out of date), =
plus it was my understanding that the auto tune feature required the EM2/3 =
as well as the EC.=0A=
>>>=0A=
>>> For best results the EFISM should be grounded to the aircraft electrica=
l ground rather than to a ground pin on some other accessory.  It should no=
t really make a difference, but closer to the battery negative lead the bet=
ter in my opinion.  Current thought seems to be not to use aircraft chassis=
 as a primary electrical ground.=0A=
>>>=0A=
>>> PS Don't' forget to bring the EFISM with you.=0A=
>>>=0A=
>>> Ed=0A=
>>>=0A=
>>> -----Original Message----- From: Charlie England=0A=
>>> Sent: Monday, June 02, 2014 9:11 PM=0A=
>>> To: Rotary motors in aircraft=0A=
>>> Subject: [FlyRotary] controller, sensor, wiring questions=0A=
>>>=0A=
>>> Currently building the wiring harness for the engine/controller, & have=
=0A=
>>> a few questions.=0A=
>>>=0A=
>>> 1st, is anyone running multiple devices that need to see the 1-wire O-2=
=0A=
>>> sensor? I need to feed both the EC2 (for auto-tune) and Ed A's monitor.=
=0A=
>>> Will there be a conflict if both are connected to the sensor at the sam=
e=0A=
>>> time?=0A=
>>>=0A=
>>> 1a (for Ed A), does your monitor care where it's grounded, for=0A=
>>> stable/accurate measurement? Both pin pairs 19/37 and pins 1/16 go to=
=0A=
>>> chassis ground, but the pairs are not common to each other in the EC2.=
=0A=
>>> Should it go direct to chassis, or to one or the other of the ground pa=
irs?=0A=
>>>=0A=
>>> 2nd, I'd like to include Steve Boese's Rotary Copilot running on an=0A=
>>> iPaq, for data logging. I'm fairly confident that I'll need to switch=
=0A=
>>> pin 27 ( EC2 serial data in) between the two devices. Can pin 7 (EC2=0A=
>>> serial data out) feed both devices at once, or should it be switched, a=
s=0A=
>>> well?=0A=
>>>=0A=
>>> 3rd, the high impedance injectors seem to draw less than 1 A each, when=
=0A=
>>> on. Are true 10A DC rated switches needed for injector disable, or woul=
d=0A=
>>> lower current, AC rated switches do? A true 10 A DC rated switch is not=
=0A=
>>> that easy  to find (or afford...), and with the draw being effectively=
=0A=
>>> AC (high speed switching) and <2 A for primary pair and secondary pair,=
=0A=
>>> it would seem that a 5A DC rated switch should get the job done safely.=
=0A=
>>>=0A=
>>> 4th, anyone have a source for the RX-8 crank angle sensor connector? I=
=0A=
>>> can solder directly to the sensor, but I'd rather use proper connectors=
,=0A=
>>> if possible.=0A=
>>>=0A=
>>> Thanks,=0A=
>>>=0A=
>>> Charlie=0A=
>>>=0A=
=0A=
=0A=
--=0A=
Homepage:  http://www.flyrotary.com/=0A=
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.=
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