Evaluation of Idle Combustion Stability Using Flywheel Acceleration

Teng, Charlie

doi:10.4271/2003-01-1673

Cited by 12 publications

(1 citation statement)

References 5 publications

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“…Methods for engine combustion stability evaluation include the cylinder pressure fluctuation method 19 and the crankshaft speed fluctuation method. 16,20 The former is a direct assessment method, whilst the latter is an indirect assessment method. Although the crankshaft speed fluctuation method is simpler, it is difficult to separate the influence brought by the rotational system imbalance.…”

Section: Analysis Of Engine Combustion Excitationmentioning

confidence: 99%

An Experimental Study of Vehicle 1st Order Vibration Improvement at Engine Idle

Shen¹,

Tang²,

Feng³

et al. 2020

The International Journal of Acoustics and Vibration

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An experimental study of the 1st order vibration improvement at engine idle condition of a malfunctional vehicle in development is presented in this work. Firstly, the generation mechanism of the vehicle 1st order vibration problem at engine idle is analyzed based on theoretical analysis. Then, experiments are designed to derive the possible vibration excitation source and transfer path through comprehensive analysis. The powertrain rotational system imbalance exceeding a limit is determined to be the main reason for the vehicle 1st order abnormal vibration. The resonance of the mounting system excited by the powertrain rotational system intensifies the 1st order abnormal vibration. Experimental analyses show that the clutch imbalance severely exceeds the prescribed limit, which confirms the diagnosis of the excitation source, and a significant improvement of about 87% of the 1st order vibration can be achieved by adjusting the clutch imbalance.

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Section: Analysis Of Engine Combustion Excitationmentioning

confidence: 99%