Charge Air Cooler And Plumbing Description; Exhaust System - Dodge Sprinter 2006 Manual

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EXHAUST SYSTEM

• Redu ct ion in exh a u st em ission s a s a r esu lt of a n
im pr ovem en t in t h e a ir su pply of t h e en gin e.
• In cr ea sed power ou t pu t a s a r esu lt of t h e h igh er
ch a r ge pr essu r e com bin ed wit h a r edu ced exh a u st
ba ckpr essu r e a n d t h u s im pr oved ch a r ge cycle.
OPERA TION
Th e exh a u st ga ses of t h e en gin e a r e dir ect ed
t h r ou gh t h e exh a u st m a n ifold in t o t h e t u r bin e h ou s-
in g on t o t h e t u r bin e wh eel (F ig. 2). Th e flow en er gy
of t h e exh a u st ga ses ca u se t h e t u r bin e wh eel t o
r ot a t e. Con sequ en t ly, t h e com pr essor wh eel, wh ich is
con n ect ed t h r ou gh t h e t u r bin e sh a ft wit h t h e t u r bin e
wh eel, is dr iven a t t h e sa m e speed. Th e fr esh a ir
in du ct ed by t h e com pr essor wh eel is com pr essed a n d
pa ssed t o t h e en gin e (F ig. 2).
Th e ch a r ge pr essu r e is con t r olled by va r yin g t h e
posit ion of t h e gu ide va n es (F ig. 2). Th e gu ide st u d of
t h e con t r ol lin ka ge of t h e boost pr essu r e a ct u a t or
t u r n s t h e a dju st in g r in g in t h e t u r bin e h ou sin g (F ig.
2). As a r esu lt , a ll t h e gu ide va n es wh ose gu ide st u ds
likewise m esh in t o t h e a dju st in g r in g, a r e a lso
t u r n ed (F ig. 2).
At low speeds, t h e flow cr oss-sect ion is r edu ced by
closin g t h e gu ide va n es (F ig. 2). Con sequ en t ly t h e
speed a t wh ich t h e exh a u st ga s im pa ct s on t h e t u r-
bin e wh eel is in cr ea sed, a s a r esu lt of wh ich t h e
speed of t h e t u r boch a r ger a n d t h u s t h e ch a r ge pr es-
su r e r ises.
At h igh en gin e speeds t h e gu ide va n es a r e in cr ea s-
in gly open ed a n d t h e flow cr oss-sect ion is t h u s
en la r ged, a s a r esu lt of wh ich t h e speed of t h e t u r bo-
ch a r ger r edu ces a n d t h e ch a r ge pr essu r e dr ops.
Fig. 2 TURBOCHARGER COMPONENTS
1 - COMPRESSOR HOUSING
2 - GUIDE VANE
3 - GUIDE STUD OF GUIDE VANE
4 - GUIDE STUD OF CONTROL LINKAGE
5 - CONTROL LINKAGE
6 - ADJUSTING RING
7 - TURBINE HOUSING
8 - BOOST PRESSURE CONTROL UNIT
1A - EXHAUST GASES TO TURBINE WHEEL
2A - TURBO INLET (FRESH AIR)
3A - TURBO OUTLET (COMPRESSED AIR)
4A - EXHAUST OUTLET
CH ARGE AI R COOLER AN D
PLU M BI N G
DESCRIPTION
Th e ch a r ge a ir syst em con sist s of t h e ch a r ge a ir
cooler a n d ch a r ge a ir cooler pipin g.
Th e ch a r ge a ir cooler is a h ea t exch a n ger t h a t u ses
a ir flow fr om veh icle m ot ion t o dissipa t e h ea t fr om
t h e in t a ke a ir. As t h e t u r boch a r ger in cr ea ses a ir
pr essu r e, t h e a ir t em per a t u r e in cr ea ses. Lower in g
t h e in t a ke a ir t em per a t u r e in cr ea ses en gin e effi-
cien cy a n d power.
VA