To solve the problems of a non-road diesel engine with an emission smoke level of up to 4.99FSN,a noise level of up to level 4,and a low-pitched"bang-bang"impact noise during operation,the following work was carried out.First,determine that there is a clear impact sound between the cylinder head and the engine block through a stethoscope,and determine that the abnormal noise is caused by combustion.Subsequently,the matching between the original oil spray and the combustion chamber was analyzed,revealing that the combustion parameter design was not reasonable,leading to insufficient fuel combustion.In response to the above problems,parameters such as the protrusion of the nozzle,the angle of the oil line,and the spray penetration rate have been optimized.After verification,the smoke emission of the optimized diesel engine was reduced to 1.65FSN,a decrease of 71%;The noise level has also been reduced to level 2,and the low-pitched"bang-bang"impact sound has almost disappeared,meeting the market indicator requirements.
关键词
非道路用柴油机/油嘴凸出量/油线夹角/喷雾贯穿率
Key words
non-road diesel engines/injector bulge/oil line angle/spray penetration rate
维普
万方数据