Abstract
Aiming at the low frequency abnormal vehicle vibration caused by engine sources, the process, key points and difficulties of synchronous combustion analysis are introduced in detail, especially the idea source of cylinder pressure external envelope post-processing method is emphasized. Firstly, the combustion and vibration data of four cylinders was collected and analyzed by synchronous combustion analysis method, and the external envelope post-processing method of cylinder pressure data was proposed for the first time. Secondly, by analyzing the cylinder pressure after envelope post-processing method, it was found that the root of abnormal order problem was the periodic lag caused by the pressure of each cylinder of the engine. In the detailed analysis of the cylinder pressure, the hysteresis law was determined as “2–4-3–1”. Finally, by optimizing the calibration data, the abnormal order vibration peak of the driver’s seat was reduced from 0.25g to 0.01g, which effectively controlled the low-frequency vibration of the vehicle.
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Xu, M., Shi, J., Li, J., Qu, X., Yuan, X., Zhao, S. (2023). Application of Synchronous Combustion Analysis Method to Analysis and Control of Low Frequency Chattering Vibration of Vehicle. In: Proceedings of China SAE Congress 2022: Selected Papers. SAE-China 2022. Lecture Notes in Electrical Engineering, vol 1025. Springer, Singapore. https://doi.org/10.1007/978-981-99-1365-7_19
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DOI: https://doi.org/10.1007/978-981-99-1365-7_19
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