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Main parts maintenance
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7.3.3. Injection nozzle
The injection nozzle assembly consists of the nozzle body and needle valve assembly. Pressurized fuel
delivered from the fuel injection pump is sprayed into the combustion chamber past the injection nozzle at
proper spray pressure and spray angle, then burnt completely to achieve effective engine performance.
The fuel injected should necessarily be ignited immediately and combusted in a short period of time as too
long a combustion period will prevent the high speedy operation of the engine and can cause serious engine
knocking.
1) Structure
A copper seal fitted to the injector ensures
gas-tight seating and good heat dissipation.
The opening pressure of the nozzle is
adjusted by means of shims at the com-
pression spring.
1.
Nozzle holder assembly
2.
Nozzle tip
3.
Nozzle locking nut
4.
Seal ring
2) Maintenance
●
After removing carbon deposit, submerge the nozzle in diesel oil and clean it.
●
Replace all the gaskets with new ones.
●
Assemble the parts and tighten them to specified torque.
(1) At valve closed
(2) At valve opened
EQM4024I
2
4
SHIM
COIL SPRING
GUIDE BUSH
INTERMEDIATE
WASHER
UNION NUT
3
1
EDV2218082
Содержание AD158TI
Страница 2: ......
Страница 16: ...Specification 10...
Страница 25: ...Commissioning and operation 19 2 Digital gauge panel Circuit diagram EDV2218035...
Страница 34: ...Commissioning and operation 28...
Страница 56: ...General information 50...
Страница 70: ...Main accessory parts 64...
Страница 120: ...Disassembly and assembly of major components 114...
Страница 172: ...Main parts maintenance 166...
Страница 187: ...Governor Actuator Controller...
Страница 188: ......
Страница 221: ...33 6 Product dimension 170 130 140 153 165 6 19 4 6 EDL11160004...
Страница 253: ...HY DP MANUAL 001 Digital Panel for Marine Engines Service Manual Ver 1 0 Doosan Infracore...
Страница 294: ......