Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 528
EMISSIONS CONTROL
TABLE OF CONTENTS
page
page
. . . . . . . . . . . . . . . . . . 1
EVAPORATIVE EMISSIONS
TABLE OF CONTENTS
page
page
CRANKCASE VENTILATION HEATER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . 1
CRANKCASE VENTILATION BREATHER
. . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . . . 3
CRANKCASE VENTILATION
HEATER
REMOVAL
(1) Disconnect the negative battery cable.
(2) Remove the turbocharger heat shield.
(3) Disconnect the CCV heater wiring harness con-
nector.
(4) Using a slight twisting motion, separate the
CCV breather tube from the heater.
(5) Separate the CCV heater from the turbo-
charger air inlet duct.
INSTALLATION
(1) Clean all mating surfaces.
(2) Insert the CCV heater into the turbocharger
inlet hose aligning the arrow on the heater with the
tab on the hose (Fig. 1).
(3) Connect and properly seat the CCV breather
hose on the CCV heater (Fig. 1).
Fig. 1 CCV HEATER
1 - BREATHER HOSE
2 - HARNESS CONNECTOR
3 - TURBOCHANGER INLET HOSE
4 - HEATER ALIGNMENT AREA
5 - CCV HEATER
VA
EMISSIONS CONTROL
25 - 1
(4) Connect the wiring harness connector to the
CCV heater (Fig. 1).
(5) Install the turbocharger heat shield.
(6) Connect the negative battery cable.
CRANKCASE VENTILATION
BREATHER
DESCRIPTION
The crankcase ventilation breather is a three
staged, filtered, oil separating breather with a oil
return passage into the cylinder head cover (Fig. 2).
The oil separator removes oil from the blow by gasses
to reduce MAF sensor contamination. For service
procedures refer to (Refer to 25 - EMISSIONS CON-
TROL/EVAPORATIVE
EMISSIONS/CCV
RESTRICTER - REMOVAL).
REMOVAL
(1) Remove the engine cover.
(2) Disconnect the breather outlet hose at the
breather (Fig. 3).
(3) Remove the breather fasteners (Fig. 3).
(4) Wiggle the breather free from the cylinder head
cover (Fig. 3).
Fig. 2 CCV BREATHER
25 - 2
EVAPORATIVE EMISSIONS
VA
INSTALLATION
(1) Remove the oil fill cap, clean the oil return pas-
sage in the cylinder head cover, then blow out with
low pressure compressed air.
(2) Clean mating surfaces.
(3) Install the CCV breather and tighten fasteners
to 11 N·m (97 in.lbs.) (Fig. 3).
(4) Connect the CCV breather outlet hose (Fig. 3).
(5) Install the engine cover (Refer to 9 - ENGINE -
INSTALLATION).
Fig. 3 CCV BREATHER
1 - FUEL RAIL
6 - CAM POSITION SENSOR
2 - FUEL RAIL PRESSURE SENSOR
7 - FUEL INJECTOR
3 - FUEL INJECTOR RETURN LINE
8 - HIGH PRESSURE FUEL INJECTOR SUPPLY LINE
4 - CCV BREATHER
9 - FUEL PRESSURE SOLENOID
5 - CYLINDER HEAD COVER
10 - FUEL RAIL SUPPLY LINE
VA
EVAPORATIVE EMISSIONS
25 - 3
EXHAUST GAS RECIRCULATION
TABLE OF CONTENTS
page
page
EXHAUST GAS RECIRCULATION
. . . . . . . . . . . . . . . . . . . . . . . . . . 4
VALVE
. . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
VALVE COOLER
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
EXHAUST GAS RECIRCULA-
TION
DESCRIPTION
The EGR system can provide up to 35% exhaust
gas recirculation. The EGR operates during all
engine speed and load conditions. At wide open throt-
tle, it provides a 5% recirculation rate. The EGR
shuts down during high engine idle to avoid carbon
build up on the valve. The EGR also deactivates if
the EGR temperature is too high. The EGR also has
a self cleaning function that opens and closes twice
after the engine has been shut off to eliminate soot
deposits.
Apart from the charge air distribution manifold
and the mixing chamber, the intake manifold also
includes a finned EGR cooler. Coolant flows through
the cooler to reduce the temperature of the recircu-
lated gas after it was cooled by running through the
cylinder head. The management of this temperature
significantly reduces emissions (Fig. 1).
25 - 4
EXHAUST GAS RECIRCULATION
VA
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст