Volvo D13H - DPF Systems

38VOLVOEngines
DPFSystems
TheVOLVOsystemschemicallyalterssootbyhighheatintoaharmlessgaswhichpasses
outthroughthestackpipe.Atthesehightemperatures,theprocessisrelativelyrapid(10–12
minutes).Eventually,theltermustberemovedtopermitclearingawayoftheashwith
specialequipment.
TheDPF-muferhasanintegratedheatinsulationthatcoversmostareasofthemufer.The
DPFmufersareun-insulatedattheV-clampbodyconnections,inletandoutletpipes.
Thefollowingsurfacetemperatureshavebeenmeasuredwiththemuferfreelypositioned
inaroomtemperatureenvironmentwithnoforcedcoolingorwind(onlyselfconvection).
Note:Thesearenotmaximumtemperatures!Thesurfacetemperatureinacertainvehicle
installations,isdependentonthedegreeofencapsulationandtheairowaroundthemufer.
CompactDPFTemperatures
PositionThicknessof
HeatInsulation
atexhaust
temperatureof350
°C(662°F)atthe
DPF-muferinlet(no
regeneration)
atexhaust
temperature450
°C(842°F)atthe
DPF-muferinlet(no
regeneration)
Inletsection—top10mm(0.4in.)170°C(338°F)190°C(374°F)
Inletsection—sideNoinsulation260°C(550°F)320°C(608°F)
DOCsection9mm(0.35in.)175°C(347°F)215°C(419°F)
DPFsection10.5mm(0.41
in.)
145°C(293°F)190°C(374°F)
Outletsection—
side
4.5mm(0.18in.)100°C(212°F)150°C(302°F)
Outletsection—
bottom
4.5mm(0.18in.)120°C(248°F)170°C(338°F)
Clampingarea—
side
Noinsulation230°C(446°F)300°C(572°F)