Dodge Sprinter 2006 Manual page 2148

25 - 4 EXHAUST GAS RECIRCULA TION
EXHAUST GAS RECIRCULATION
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 4
VALVE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
EX H AU ST GAS RECI RCU LA-
T I ON
DESCRIPTION
Th e E GR syst em ca n pr ovide u p t o 35% exh a u st
ga s r ecir cu la t ion . Th e E GR oper a t es du r in g a ll
en gin e speed a n d loa d con dit ion s. At wide open t h r ot -
t le, it pr ovides a 5% r ecir cu la t ion r a t e. Th e E GR
sh u t s down du r in g h igh en gin e idle t o a void ca r bon
bu ild u p on t h e va lve. Th e E GR a lso dea ct iva t es if
t h e E GR t em per a t u r e is t oo h igh . Th e E GR a lso h a s
a self clea n in g fu n ct ion t h a t open s a n d closes t wice
a ft er t h e en gin e h a s been sh u t off t o elim in a t e soot
deposit s.
Apa r t fr om t h e ch a r ge a ir dist r ibu t ion m a n ifold
a n d t h e m ixin g ch a m ber, t h e in t a ke m a n ifold a lso
in clu des a fin n ed E GR cooler. Coola n t flows t h r ou gh
t h e cooler t o r edu ce t h e t em per a t u r e of t h e r ecir cu -
la t ed ga s a ft er it wa s cooled by r u n n in g t h r ou gh t h e
cylin der h ea d. Th e m a n a gem en t of t h is t em per a t u r e
sign ifica n t ly r edu ces em ission s (F ig. 1).
EX H AU ST GAS RECI RCU LAT I ON
TABLE OF CONTENTS
page
REMOVAL
INSTALLATION
VALVE COOLER
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
VA
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