A Parked Regeneration

Discussion in 'Questions From New Drivers' started by devildawg89, Jul 2, 2012.

  1. Gizmo_Man

    Gizmo_Man Road Train Member

    Aug 15, 2011
    Hardly around

    even though the label on my sun visor says i can do a re-gen while driving, it does not happen. i have to do it while parked.

    to me, why affix such a label telling us this can be done (while driving) when it cannot..???
    chompi Thanks this.
  2. vinsanity

    vinsanity Road Train Member

    Nov 23, 2009
    South Florida
    You probably know this, but there are two kinds of regens. Active and Passive. Active is a parked regen. Passive is an automatic regen. Basically the truck is doing a regen all the time. You just don't notice it. It's when the RPMs are low, like sitting and idling a long time, that the thing gets too clogged up. When the light comes on at first that indicates that the filter is getting clogged and usually getting up to highway speed clears it out.

    So, no, you can't do anything to activate a regen when you are driving. It's automatic.

    The problem with governed trucks is the RPMs often don't get high enough to clean it out when you are doing top speed. I usually drop a gear and go at the upper RPM range and that clears it out pretty quick.
  3. Smaggs

    Smaggs Pie Crust

    Apr 12, 2011
    Pittsburgh, PA
    Does your truck use DEF? If so, the dash does not indicate to you when the driving regen is happening. I drove a few different Volvo trucks that did and did not use DEF. The ones that used DEF steadily ran that fluid with the fuel, sort of like constantly having a fuel injector cleaner in a car, I suppose.

    The trucks I drove without DEF would indicate a driving regen and a parked regen icon would come on if it was necessary, which was often.

    I may not be right about your situation, but I wanted to share my experience.
  4. Gizmo_Man

    Gizmo_Man Road Train Member

    Aug 15, 2011
    Hardly around
    well i took over the route/run when the truck had 100,000 miles on it, so i really do not know how much idle time the former driver had, and even before him, i do not know at what miles he got the truck.

    my idle times are "nill" as i only idle at high RPM's in the winter to warm it up, (about 30 minutes), then i shut it down. then re-start when i am ready to leave. at each stop i do, it get's shut down. and nearly all my drive time is at 65/70 MPH, except of course, when i get off the highways to make my stops. so very little low RPM/city driving.

    i will try the one gear lower/increase the RPM's from time to time, thanks for the tip.

    no, my truck does not have the DEF. i was told it is supposed to do a regen on its own, now if it IS doing it on it's own, i do not notice it as i am driving. (i see no dash lights, feel nothing different as i am driving).

    what pee'd me off was the fact that the sun visor label said I COULD do a regen at highway speeds. but the truck simply would not do it.

    i can only hope that in short time, like BEFORE i retire (in 10 more years), they get this crap straightened out.

    after i retire, i couldn't give a flip about trucking, let alone the emissions.
    G.Anthony Thanks this.
  5. DirtyBob

    DirtyBob Road Train Member

    Sep 2, 2010
    If it's forcing you to do a parked and never idling there is probably a problem somewhere else. Like you said in another post though, they do clog up over time eventually. They do need to be manually cleaned. A Freightliner mechanic told me the carriers are wanting them to push it back further and further on the mileage to pull the filter and clean it.
    Smaggs Thanks this.
  6. Smaggs

    Smaggs Pie Crust

    Apr 12, 2011
    Pittsburgh, PA

    I, whole heartedly, agree with this.
  7. scottied67

    scottied67 Road Train Member

    Mar 14, 2010
    california norte
    I was doing a parked regen a couple times a day there for a while. Finally the truck derated and had to go to the shop. 400,000 miles on the DPF, cleaned twice that I know of. They put a brand new one in, and and EGR cooler as well as a new 7th injector which was the main culprit it turns out, is the critical thing that needs to work properly to shoot the fuel in to burn at the high temps to cook out the soot.

    So what I'm getting at is the truck needs to be plugged into the computer to find any fault codes to find out why it is requesting parked regen all the time and not getting satisfied.
  8. Pmracing

    Pmracing Road Train Member

    Jan 28, 2011
    Arlington Heights, IL
    Ya, put it in second gear and do about a 100 miles per hour. That'll heat her up!

  9. Gizmo_Man

    Gizmo_Man Road Train Member

    Aug 15, 2011
    Hardly around
    the shop mechanic told me it costs around $2,600 to do the cleaning. they have to send it out to a company that can do this.
  10. striker

    striker Road Train Member

    Aug 8, 2009
    Denver, Co
    we took the one off my truck to KW, they had it overnight to clean it and return it. IIRC, it was under $2,000 for the service, still didn't correct the problem, fuel pump and 7th injector had to be replaced as well
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