摘要
利用缸压信号傅里叶变换的方法推导了平均有效压力(IMEP)计算公式,并结合分析DEUTZ BF6M 2015柴油机缸压信号的频谱,得到了能够保证IMEP计算精度的缸压信号最大采样步长;研究了采样步长和上止点位置误差对IMEP计算结果的影响;运用MicroAutoBox硬件平台,开发了用于柴油机转矩闭环控制的实时IMEP在线计算系统,并在DEUTZ BF6M 2015柴油机台架上对开发的IMEP在线计算系统进行了试验研究.结果表明,与Kistler燃烧分析仪相比,开发的IMEP在线计算系统,在保证上止点位置准确,采样步长小于30°CA的条件下,IMEP计算结果误差小于5%.
The calculation formula of the indicated mean effective pressure（IMEP）was derived from the cylinder pressure signal using the Fourier transform method.Maximum sampling step is determined by analyzing the spectrum distribution of cylinder pressure of the DEUTZ BF6M 2015 diesel engine.The effects of sampling step and top dead center position deviation on IMEP calculation were presented.A real-time on-line IMEP calculation system for the diesel engine torque closed-loop control was developed on the dSPACE-MicroAutoBox platform.Experimental study on on-line IMEP calculation system was made on the DEUTZ BF6M 2015 diesel engine test bench.Experimental results show that,compared with the Kistler Combustion Analyzer,the IMEP calculation error from the on-line IMEP calculation system is less than 5% when sampling step is less than 30,° CA with accurate position of top dead center.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2011年第3期276-281,共6页
Transactions of Csice
基金
国家自然科学基金资助项目(50975026)
