叉车柴油机加速工况声品质改进试验研究
Experimental study on sound quality improvement of a diesel engine for forklift trucks under acceleration conditions
汪会斌 1余磊 1樊士贡 1谢俊杰1
作者信息
- 1. 安徽全柴动力股份有限公司技术中心,安徽 滁州 239500
- 折叠
摘要
为降低某叉车柴油机加速过程中的噪声,试验分析柴油机加速异响产生的原因,研究喷油规律对加速噪声的影响,分析声品质参数,并提出改进方案.试验结果表明:柴油机急加速"嘎嘎"声是由燃烧过程缸内压力升高率过大导致,增加预喷量可以在一定程度上降低噪声水平,但对加速异响几乎没有影响;减小喷油提前角可以轻微降低加速异响;降低轨压上升率可以明显降低加速异响,轨压上升率由150 MPa/s降低至100 MPa/s,柴油机加速时异响消失,响度的变化趋势与声压级基本一致,尖锐度和粗糙度降低,声品质明显提升.
Abstract
In order to reduce the noise in the acceleration process of a forklift diesel engine,the causes of the abnormal sound of the diesel engine and the influence of the fuel injection regularity on the acceleration noise are studied experimentally.The sound quality parameters are analyzed and the improvement scheme is proposed.The test results show that the"rattling"sound during rapid acceleration of the diesel engine is caused by the excessive pressure rise rate in the cylinder during the combustion process.Increasing the pre-injection fuel quantity can reduce the noise level to a certain extent,but it has little effect on the accelerating abnormal noise.Reducing the fuel injection advance angle can slightly reduce the acceleration abnormal noise.Reducing the rail pressure rise rate can significantly reduce the acceleration abnormal noise.The rail pressure rise rate is reduced from 150 MPa/s to 100 MPa/s.The abnormal noise disappears when the diesel engine is accelerating.The change trend of loudness is basically consistent with the sound pressure level.The sharpness and roughness are reduced,and the sound quality is significantly improved.
关键词
柴油机/轨压上升率/预喷油量/喷油提前角/声品质Key words
diesel engine/rising rate of rail pressure/pre-injection fuel quantity/fuel injection advance angle/sound quality引用本文复制引用
基金项目
安徽省农业物质技术装备领域揭榜挂帅项目(S202320230906020018)
出版年
2024
NETL
NSTL
万方数据