NOZZLE PRESSURE

A BETTER COMBUSTION PROCESS

With increasing injection pressure, indicated power of engine is increased about 12% and Indicated Specific Fuel Consumption (ISFC) of engine is decreased. This means that in return, for the same fuel consumption, engine power output is increased causing a better combustion process.

EFFECT OF INCREASING FUEL INJECTION PRESSURE

The graph on the right shows effect of fuel injection pressure on NOx pollution per each crankshaft angle.

With increasing injection pressure,
fuel particles became smaller, and in fact,
atomization of fuel will get better,
and area of pre-mixing becomes faster.

By increasing the injection pressure from 275 to 1000 bar,
soot decreases about 58%.