Dodge Sprinter 2006 Manual page 1844

21 - 106 AUTOMA TIC TRANSMISSION NAG1 - SERVICE INFORMA TION
r ela t ion t o t h e loa d a n d gea r. All ot h er pr essu r es
r equ ir ed for t h e t r a n sm ission con t r ol a r e der ived
fr om t h e wor kin g pr essu r e.
Lubrication Pressure (p - Sm)
At t h e wor kin g pr essu r e r egu la t in g va lve su r plu s
oil is diver t ed t o t h e lu br ica t ion pr essu r e r egu la t in g
va lve, fr om wh er e it is u sed in r egu la t ed a m ou n t s t o
lu br ica t e a n d cool t h e m ech a n ica l t r a n sm ission com -
pon en t s a n d t h e t or qu e con ver t er. F u r t h er m or e, t h e
lu br ica t ion pr essu r e (p-Sm ) is a lso u sed t o lim it t h e
pr essu r e in t h e t or qu e con ver t er.
Shift Pressure (p - S)
Th e sh ift pr essu r e is det er m in ed by t h e sh ift pr es-
su r e r egu la t in g solen oid va lve a n d t h e sh ift pr essu r e
r egu la t in g va lve. Th e sh ift pr essu r e:
• Regu la t es t h e pr essu r e in t h e a ct iva t in g sh ift
elem en t du r in g t h e sh ift ph a se.
• Det er m in es t oget h er wit h t h e m odu la t in g pr es-
su r e t h e pr essu r e r edu ct ion a t t h e dea ct iva t in g sh ift
elem en t a s r egu la t ed by t h e over la p r egu la t in g va lve.
• In it ia lizes 2n d gea r in lim p-h om e m ode.
Modulating Pressure (p - Mod)
Th e m odu la t in g pr essu r e in flu en ces t h e size of t h e
wor kin g pr essu r e a n d det er m in es t oget h er wit h t h e
sh ift pr essu r e t h e pr essu r e r egu la t ed a t t h e over la p
r egu la t in g va lve. Th e m odu la t in g pr essu r e is r egu -
la t ed a t t h e m odu la t in g pr essu r e r egu la t in g solen oid
va lve, wh ich is u n der r egu la t in g va lve pr essu r e. Th e
m odu la t in g pr essu r e is va r ia ble a n d r ela t ive t o t h e
en gin e loa d.
Regulating Valve / Control Valve Pressure (p - RV)
Th e r egu la t in g va lve pr essu r e is r egu la t ed a t t h e
r egu la t in g va lve pr essu r e r egu la t in g va lve in r ela t ion
t o t h e wor kin g pr essu r e (p-A) u p t o a m a xim u m pr es-
su r e of 8 ba r (116 psi). It su pplies t h e m odu la t in g
pr essu r e r egu la t in g solen oid va lve, t h e sh ift pr essu r e
r egu la t in g solen oid va lve a n d t h e sh ift va lve pr essu r e
r egu la t in g va lve.
Shift Valve Pressure (p - SV)
Th e sh ift va lve pr essu r e (p-SV) is der ived fr om t h e
r egu la t in g va lve pr essu r e (p-RV), is r egu la t ed a t t h e
sh ift va lve pr essu r e r egu la t in g va lve a n d is t h en
pr esen t a t t h e:
• 1-2 a n d 4-5 sh ift solen oid va lve.
• 3-4 sh ift solen oid va lve.
• 2-3 sh ift solen oid va lve.
• Tor qu e con ver t er locku p solen oid va lve.
• 3-4 a n d 2-3 sh ift pr essu r e sh ift va lve.
Th e sh ift va lve pr essu r e (p-SV) con t r ols t h e com -
m a n d va lves via t h e u psh ift /down sh ift
va lves.
Overlap Pressure (p - Ü)
Th e over la p pr essu r e con t r ols t h e sh ift com pon en t
pr essu r e r edu ct ion du r in g a sh ift ph a se. Th e pr es-
su r e in a sh ift elem en t a s it disen ga ges is con t r olled
du r in g t h e sh ift ph a se depen din g on en gin e loa d
(m odu la t in g pr essu r e) a n d t h e pr essu r e in t h e sh ift
elem en t a s it en ga ges. Th e a dju st ed pr essu r e is
in ver sely pr opor t ion a l t o t h e t r a n sm ission ca pa bilit y
of t h e sh ift elem en t bein g en ga ged (con t r olled over-
la p).
Working Pressure Regulating Valve (Operating Pressure)
Fig. 101 Working Pressure Regulating Valve
1 - PRESSURE FROM K1/K2
2 - END FACE
3 - TO TORQUE CONVERTER REGULATING VALVE
4 - WORKING PRESSURE REGULATING VALVE
Th e wor kin g pr essu r e r egu la t in g va lve (4) (F ig.
101) is loca t ed in t h e va lve h ou sin g of t h e sh ift pla t e.
It r egu la t es t h e pr im a r y pr essu r e of t h e h ydr a u lic
syst em .
solen oid
VA