| INFLUENCE OF INJECTION SYSTEM PARAMETERS ON COMBUSTION
NOISE OF A SMALL POWER NON-ROAD DIESEL ENGINE |
| Xinfeng Zhou , Zhihao Ma , Yuna Liu , Ao Li |
| College of Vehicle and Transportation Engineering, Henan University of Science and Technology |
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| ABSTRACT |
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Combustion noise accounts for a large proportion of diesel engine noise. On the premise of not increasing the
cost of diesel engine, the injection system parameters such as dynamic fuel supply advance angle and needle valve opening
pressure are optimized, and the influence of the above parameters on the in-cylinder pressure, rate of pressure rise, in-cylinder
pressure level (CPL) spectrum and high frequency pressure oscillation is analyzed. The study shows that reducing the
dynamic fuel supply advance angle can effectively reduce the combustion noise, and appropriately increasing the needle
valve opening pressure can also reduce the combustion noise. After the optimization of injection parameters, the combustion
noise of the diesel engine with an electronically controlled VE pump-tube-nozzle injection system is significantly reduced
compared with the prototype engine, and can reach the same level of combustion noise as the diesel engine with the common
rail system without deterioration of fuel economy and emission performance. The experimental study can provide technical
reference for diesel engines in the selection of injection system parameters and the optimization of combustion noise in the
improvement stage. |
| Key Words:
Non-road small power diesel engine, Injection system parameters, Combustion noise, High frequency
pressure oscillation |
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Corresponding Author.
Zhihao Ma , Email. 
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