Analysis of automobile engine cylinder pressure and rotation speed from engine body vibration signal

Yuhua Wang; Xiang Cheng; Haishu Tan

doi:10.1117/12.2211319

26 January 2016 Analysis of automobile engine cylinder pressure and rotation speed from engine body vibration signal

Yuhua Wang, Xiang Cheng, Haishu Tan

Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 99030T (2016) https://doi.org/10.1117/12.2211319
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China

Abstract

In order to improve the engine vibration signal process method for the engine cylinder pressure and engine revolution speed measurement instrument, the engine cylinder pressure varying with the engine working cycle process has been regarded as the main exciting force for the engine block forced vibration. The forced vibration caused by the engine cylinder pressure presents as a low frequency waveform which varies with the cylinder pressure synchronously and steadily in time domain and presents as low frequency high energy discrete humorous spectrum lines in frequency domain. The engine cylinder pressure and the rotation speed can been extract form the measured engine block vibration signal by low-pass filtering analysis in time domain or by FFT analysis in frequency domain, the low-pass filtering analysis in time domain is not only suitable for the engine in uniform revolution condition but also suitable for the engine in uneven revolution condition. That provides a practical and convenient way to design motor revolution rate and cylinder pressure measurement instrument.

Citation Download Citation

Yuhua Wang, Xiang Cheng, and Haishu Tan "Analysis of automobile engine cylinder pressure and rotation speed from engine body vibration signal ", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99030T (26 January 2016); https://doi.org/10.1117/12.2211319

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