Study on the Influence of Fuel Injection Parameters on Idling Noise of Large Cylinder Diameter Vehicle Diesel Engines
The preliminary test results show that the effect of blasting pressure and pre-injection mode on the noise of the whole ma-chine is obvious in the low load condition.In order to improve the noise comfort of large-diameter diesel engine,this paper takes a V-type 12-cylinder large-diameter diesel engine as the research object,and conducts a comparative test of idle noise by adjusting the main injection advance Angle,pre-injection amount,pre-injection interval Angle,rail pressure and other injection parameters.The experimental results show that the smaller the main spray advance Angle and rail pressure,the smaller the noise pressure level and the better the sound quality.There is a critical value of pre-injection amount and pre-injection interval Angle,and the comprehensive e-valuation of noise pressure level and sound quality is the best under this critical value.The effects of engine injection parameters such as main injection advance Angle,pre-injection amount,pre-injection interval Angle and rail pressure on idle noise of large cylinder diameter diesel engines are concentrated in the frequency range of 500Hz～6300Hz.The research results of this paper can be used to improve the quality of idle noise of large cylinder diameter diesel engines.
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