7.3.4. Fuel 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 speed operation of the engine
and can cause serious engine knocking.
1) Construction
2) Maintenance
Exercise extreme care when handling the injection nozzle assembly, particularly nozzle body
and needle valve as these parts are ultra precisely finished.
Wash clean the injection nozzle and remove it from the engine prior to disassembling.
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