X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4485890 for flyrotary@lancaironline.net; Wed, 29 Sep 2010 10:06:30 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=lu/RhtYP0ChAeUxMEPBris12a71TWT5f9yvo3GNwP9w= c=1 sm=0 a=gMptVMo9WQQA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=4YCh3g-l9yRP0H7-mRMA:9 a=LTRpIc8anQc15hMomJND8fR1rg0A:4 a=wPNLvfGTeEIA:10 a=C_IRinGWAAAA:8 a=Ia-xEzejAAAA:8 a=AuFryoYhrBWy7BEQEkIA:9 a=Fas_21YyLgAw6r-wSLoA:7 a=HGRZA_d9YcO9fbOaLsoadk6abCYA:4 a=si9q_4b84H0A:10 a=EzXvWhQp4_cA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:49390] helo=EdPC) by cdptpa-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 44/48-14228-2C743AC4; Wed, 29 Sep 2010 14:05:54 +0000 Message-ID: From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Auto tune/oxygen sensor Date: Wed, 29 Sep 2010 10:05:45 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003D_01CB5FBD.E210A370" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 This is a multi-part message in MIME format. ------=_NextPart_000_003D_01CB5FBD.E210A370 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bill, if it's a one wire sensor, then just about any of the "universal" = 1 wire O2 sensors you find in your auto store will work.=20 If multiwire (I.e. has a heater element and a separate sensor ground = wire), then you need to get one with the same number of wires. If you = get the same make O2 sensor, then the wires should be the same color. Bosch has a wire chart which tells you which color wire is which - = this may help. I always get a Bosch unit - they might cost a few bucks = more, but they are generally good quality, available anywhere and you = can find the wire color code. Here's the wiring color code for the = "Universal" Bosch unit. Cable colour allocations for the Universal Oxygen Sensor are as follows, sensor output signal wire =3D black, sensor heater element cables =3D White ( Note - heater is not polarity sensitive ) Sensor signal ground ( where used ) =3D Grey Important: The cable allocations must be assigned correctly. Otherwise the Sensor could be destroyed Don't let them sell you a wide band O2 sensor which a novice parts guy = might try to do because they all have 5 -6 wires and might get confused = with a Narrow band O2 sensor with a heater. Ed From: Bill Schertz=20 Sent: Wednesday, September 29, 2010 9:10 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Auto tune/oxygen sensor Was going to do some auto tune in the air yesterday, to get to some = regions of the performance map that can't be reached on the ground. Took off and the O2 sensor indication completely disappeared from the = EM-2 display. Did one circuit of the airport and landed. Discovered that the O2 sensor had failed (physically -- the top fell off = and separated from the body). This caused me to raise the following = questions. 1. I believe that the oxygen sensor readout is only that, not used by = the EC-2 for control purposes.=20 2. When in auto tune, is the EM-2 looking at the sensor for indications = of which way to adjust the mixture? If not, what is the feedback = mechanism? I went to the Auto parts store for a replacement, and ran into the = problem that there are 100's of different oxygen sensors, and they need = to know what car it came from. Anyone have the specs on what this sensor = is?=20 Bill Schertz KIS Cruiser #4045 N343BS Phase I testing ------=_NextPart_000_003D_01CB5FBD.E210A370 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bill, if it=92s a one wire sensor, then just = about any of=20 the "universal" 1 wire O2 sensors you find in your auto store will=20 work. 
 
 If multiwire (I.e. has a heater element = and a=20 separate sensor ground wire), then you need to get one with the same = number of=20 wires.  If you get the same make O2 sensor, then the wires should = be the=20 same color.
 
  Bosch has a wire chart which tells you = which color=20 wire is which  - this may help.  I always get a Bosch unit - = they=20 might cost a few bucks more, but they are generally good quality, = available=20 anywhere and you can find the wire color code.  Here's the wiring = color=20 code for the "Universal" Bosch unit.
 

Cable colour allocations = for the=20 Universal Oxygen Sensor are as follows,

sensor output=20 signal wire =3D black, sensor heater element cables = =3D

White ( Note - heater is = not polarity=20 sensitive ) Sensor signal ground

( where used ) =3D = Grey

Important: The cable = allocations must=20 be assigned correctly. Otherwise

the Sensor could be=20 destroyed

 
Don't let them sell you a wide band O2 sensor = which a=20 novice parts guy might try to do because they all have 5 -6 wires and = might get=20 confused with a Narrow band O2 sensor with a heater.
 
Ed

From: Bill Schertz
Sent: Wednesday, September 29, 2010 9:10 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Auto tune/oxygen = sensor

Was going to do some auto tune in the = air=20 yesterday, to get to some regions of the performance map that can't be = reached=20 on the ground.
 
Took off and the O2 sensor indication = completely=20 disappeared from the EM-2 display. Did one circuit of the airport and=20 landed.
 
Discovered that the O2 sensor had = failed=20 (physically -- the top fell off and separated from the body). This = caused me to=20 raise the following questions.
 
1. I believe that the oxygen sensor = readout is only=20 that, not used by the EC-2 for control purposes.
2. When in auto tune, is the EM-2 = looking at the=20 sensor for indications of which way to adjust the mixture? If not, what = is the=20 feedback mechanism?
 
I went to the Auto parts store for a = replacement,=20 and ran into the problem that there are 100's of different oxygen = sensors, and=20 they need to know what car it came from. Anyone have the specs on what = this=20 sensor is?
 
 
Bill Schertz
KIS Cruiser=20 #4045
N343BS
Phase I testing
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