fuel curves, O2 sensors

[Todd King]

     <<<From: ehernan3 at ford.com (Edward Hernandez (R)) Date: Mon, 24 Jun 
     1996 11:05:43 +0500
     Subject: Re: H*LP needed understanding fuel\ignition curve dynamics
     "What I'd like to better understand is how torque and fuel relate 
     along with ignition."
     Max fuel occurs at max airflow, which is usually not at peak 
     torque.... 
     *snip*
     Ed Hernandez
     Ford Motor Company
     ehernan3 at ed8719.pto.ford.com   >>>
     
     Great info, Ed- thanks. If anyone is interested I have data logs from
     various runs in my car; they show injector duty cycle, timing, MAP,
     MAF, TPS, load variable, RPM, mph, knock retard, O2 volts, etc, etc. 
     Comes in frames spaced about 1.6 sec apart. They are arranged in 
     tabular format. Both full throttle runs and just cruisin'...
     
     <<<From: Frank Parker <fparker at umich.edu> Date: Mon, 24 Jun 1996 
     15:28:19 -0600 (EDT) Subject: Re: O2
     All O2 sensors that are normal production sensors have the same 
     voltage curve so you can use most any production car sensor. Be aware 
     that the output voltage in the rich range ( around 0.7 to 0.9 volts) 
     changes a lot with temperature, the voltage dropping as temp rises: Eg 
     from 650 deg C to 900 deg C.
     frank parker   >>>
     
     Frank
        Can you expand on this temperature effect? With the turbo Buicks
     we see the O2 volts drop steadily in high gear at WOT, usually about 
     50 mV or so. Most think that this is due to an increasingly lean 
     mixture but could this be the temperature effect that you describe?
     
     <<<From: Gary W Harris <Gary_W_Harris at ccm.ch.intel.com> Date: Mon, 24 
     Jun 96 16:34:00 PDT
     Subject: Re[2]: O2
     I also beleive that there are fast and slow response O2 sensors--The 
     switchover from slow to fast occurred around 1993 in GM vehicles.  If 
     someone could elighten me(us), I would like to know how one identifies 
     which are the fast response O2 sensors!
     Gary Harris   >>>
     
     Yes, me too!
     
     Todd    Todd_King at ccm.co.intel.com