Estimation of Combustion Chamber Resonances for Improved Knock Detection in Spark Ignition Engines
Estimation of Combustion Chamber Resonances for Improved Knock Detection in Spark Ignition Engines
复制标题
燃烧室共振的估计以改进火花点火发动机的爆震检测
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Andrei Podvoiski
中科院分区：
文献类型：
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作者：
S. Carstens;Andrei Podvoiski
使用 ANSYS，根据曲柄角通过有限元对火花点火发动机的燃烧室进行建模。应用模态分析，估计燃烧室共振及其频率。结果表明，除了声速变化引起的调制之外，频率也受到调制，并且压力传感器信号由于压力波节和波腹分布的变化而受到幅度调制。应用瞬态分析，研究了爆震源处的爆炸压力增加及其对共振激发的影响。将仿真结果与在测试台发动机上测量的信号进行比较。
Using ANSYS, the combustion chamber of a spark ignition engine is modeled depending on crank angle by finite elements. Applying modal analyses, the combustion chamber resonances and their frequencies are estimated. The results show that the frequencies are modulated in addition to a modulation due to a change of the speed of sound and it turns out, that pressure senor signals are amplitude modulated due to a change of pressure node and antinode distribution. Applying transient analyses, the explosive pressure increase at knock origin and its influence on the excitation of resonances are investigated. The simulation results are compared to signals measured at a test bed engine.