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V12 aston.

Discussion in 'Technical Q&A' started by Andrew D., Jun 9, 2016.

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  1. Andrew D.

    Andrew D. F1 Rookie

    Jul 6, 2008
    3,979
    Goodwood Ontario
    Full Name:
    Andrew D.
    #1 Andrew D., Jun 9, 2016
    For the mechanics, regarding O2 sensors for this car,is it true the pre and post catalytic O2 sensors are the same part? How can this work?
     
  2. Mitch Alsup

    Mitch Alsup F1 Veteran

    Nov 4, 2003
    9,742
    #2 Mitch Alsup, Jun 9, 2016
    The front O2 sensor senses the burned mixture coming out of the cylinder.

    The rear O2 sensor senses the catalyzed mixture coming out of the cat.

    Hint, at temperature (~2000dF) the reduction chemistry on the exotic metals only takes a few hundred nanoseconds.
     
  3. ///Mike

    ///Mike F1 Veteran

    Dec 11, 2003
    6,097
    Bugtussle
    #3 ///Mike, Jun 9, 2016
    Perhaps the front and rear sensors are the same part number, but OBD2 cars must have separate pre and post converter sensors.
     
  4. Dogdish

    Dogdish Formula Junior

    Dec 27, 2005
    368
    Denver
    #4 Dogdish, Jun 9, 2016
    I think the first sensor prior to the cat inputs to the computer for fuel mixture. The second compares to the first to see if the cats are "catalyzing".

    Bill
     

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