
High pressure pump
1. Outlet for delivery to rail - 2. Delivery valve to rail -
3. Pumping - 4. Pump shaft - 5. Pumping feed duct -
6. Pressure control feed duct - 7. Pressure control solenoid
- 8. Fuel inlet from filter.
During the induction stroke,the pumping, driven by the cam
located on the pump shaft, is fed through pumping feeding
duct.The amount of fuel to send to the pumping is set by the
pressure control solenoid according to the PWM control
received by the electronic Central Unit.During the compres-
sion stage of the pumping, fuel reaches such a pressure to
open the delivery valve to common rail and supply it through
the outlet.
1, 3, 6. Pumping feed ducts - 2. Pump lubrication ducts -
4. Pumping feed main duct - 5. Pressure control solenoid -
7. Control exhaust duct - 8. Low pressure limiter valve -
9. Fuel feed duct from filter - 10. Fuel outlet.
In the section of figure 46 the low pressure fuel paths inside
the pump are represented. Pumping feed main duct (4),
pumping feed ducts (1, 3, 6), ducts used for pump lubrica-
tion (2), pressure control valve (5), low pressure limiter
valve (8) and fuel exhaust (10), are outlined. Pump shaft is
lubricated by the fuel through the delivery and backflow (2)
ducts. The control valve enables to define the fuel amount
by which feeding pumpings; the excess fuel backflow
through duct (9).
The lower pressure limiter valve in addition to operate as
manifold of the high pressure pump fuel drainage, it also
keeps pressure constant at the inlet of the regulator.
N60 ENT M37
OVERVIEW
1.37
APRIL 2004
Figure 44
Figure 45
04_047_N
1
A
B
C
D
D
2
4
3
5
7
6
8
Figure 46
04_048_N
04_049_N
sez. B-B
sez. D-D
sez. C-C
1
2
5
3
4
9
10
8
7
6
Содержание N60 ENT M37
Страница 1: ...NEF ENGINE N60 ENT M37 TECHNICAL AND REPAIR MANUAL T E C H N O L O G I C A L E X C E L L E N C E ...
Страница 4: ...N60 ENT M37 IV APRIL 2004 ...
Страница 52: ...N60 ENT M37 OVERVIEW 1 52 APRIL 2004 ...
Страница 54: ...N60 ENT M37 TECHNICAL DATA 2 54 APRIL 2004 ...
Страница 60: ...N60 ENT M37 TECHNICAL DATA 2 60 APRIL 2004 ...
Страница 62: ...N60 ENT M37 ELECTRICAL EQUIPMENT 3 62 APRIL 2004 ...
Страница 92: ...N60 ENT M37 DIAGNOSTICS 4 92 APRIL 2004 ...
Страница 116: ...N60 ENT M37 DIAGNOSTICS 4 116 APRIL 2004 ...
Страница 118: ...N60 ENT M37 MAINTENANCE 5 118 APRIL 2004 ...
Страница 122: ...N60 ENT M37 MAINTENANCE 5 122 APRIL 2004 ...
Страница 124: ...N60 ENT M37 SERVICING OPERATIONS ON INSTALLED ENGINE 6 124 APRIL 2004 ...
Страница 139: ...SECTION 7 TOOLS Page TOOLS 141 N60 ENT M37 TOOLS 7 139 APRIL 2004 ...
Страница 140: ...N60 ENT M37 TOOLS 7 140 APRIL 2004 ...
Страница 146: ...N60 ENT M37 TOOLS 7 146 APRIL 2004 ...
Страница 156: ...APRIL 2004 OVERHAUL 8 156 N60 ENT M37 ...
Страница 164: ...APRIL 2004 OVERHAUL 8 164 N60 ENT M37 ...
Страница 181: ...OVERHAUL APRIL 2004 N60 ENT M37 8 181 ...
Страница 188: ...N60 ENT M37 OVERHAUL 8 188 APRIL 2004 ...
Страница 190: ...N60 ENT M37 SAFETY PRESCRIPTIONS 9 190 APRIL 2004 ...
Страница 193: ......