Low NOX programming

Discussion in 'Trucks [ Eighteen Wheelers ]' started by freightlinerman, Sep 8, 2014.

  1. freightlinerman

    freightlinerman Road Train Member

    1,287
    536
    Mar 4, 2011
    Florida
    0
    What is it about the Low NOX programming that causes a drop in fuel economy? Is the power the same? Primarily interested in the Series 60 crowd.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. GrapeApe

    GrapeApe Road Train Member

    2,215
    2,211
    Jan 7, 2013
    0
    To lower NOx, injection timing is retarded some. This lowers cumbustion temps to reduce NOx, less timing advance is also less efficient. To get the same power after retarding timing, they have to increase the injection pulse width a little so you burn more fuel.
     
    freightlinerman, magoo68 and mtoo Thank this.
  4. savage02

    savage02 Light Load Member

    163
    50
    Dec 21, 2007
    Upstate, NY
    0
    How much power is estimated to be lost on a non/egr Series 60 with the Low NoX settings? Im guessing this also reduces throttle response?
     
  5. GrapeApe

    GrapeApe Road Train Member

    2,215
    2,211
    Jan 7, 2013
    0
    Power is rated the same. Retarding timing costs some power. Then more fueling is added to make up for the lost power, which is why effiency is lost. More fuel to get the same power. Throttle response suffers a bit, but not really noticeable. You notice it more in higher fuel costs then how it runs.
     
  6. Bush chook

    Bush chook Light Load Member

    144
    43
    Apr 27, 2009
    Geelong
    0
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.