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Diesel Combustion Improvement and Emission Reduction With High Pressure Fuel Injection - Effect of Multi Hole Injection Nozzle With Throttle Construction
Published May 11, 1994 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
The effects of multi hole nozzle with throttle construction (T/H) on combustion and emissions were investigated with high pressure injection. The throttle area of T/H nozzle was larger than that of total injection holes, therefore its fuel flow quantity was about the same as standard nozzle in steady conditions. But on the T/H nozzle, the initial fuel injection rate was decreased, and smoke emissions were improved. It is supposed that these effects were due to fuel flow turbulence in nozzle while needle valve rises.