Peak Pressure Position Estimation from Structure-Borne Sound

Villarino, R.; Böhme, J.F.

doi:10.4271/2005-01-0040

Cited by 11 publications

(2 citation statements)

References 17 publications

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“…Another method used to relate combustion characteristics to engine structure accelerations is reconstruction of the in-cylinder pressure from the surface vibrations [8–12]. Reconstructing cylinder pressure from surface accelerations would allow determination of combustion metrics, such as SOC or peak energy release rate, from the non-intrusive accelerometer signals.…”

Section: Relation Of the Vibration Characteristics To Combustion Phasingmentioning

confidence: 99%

Application of accelerometers for sensing combustion phasing of an advanced combustion engine

Massey

Wagner

Drallmeier

2011

International Journal of Engine Research

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This study evaluates the ability of accelerometers to detect combustion phasing of a single-cylinder air-cooled internal combustion engine undergoing homogeneous charge compression ignition. Metrics derived from the measured surface acceleration waveform, surface velocity, and the surface-specific kinetic energy were compared to the 50 per cent energy release location (CA50) on a cyclic basis for three different experimental test cases. The peak surface velocity location showed a robust ability to detect CA50 on a cyclic basis for short combustion durations. Using a simple single-degree-of-freedom vibration model, it is shown the impulsive nature of the combustion load and the natural frequency of the engine structure governs when the peak velocity location will indeed robustly detect CA50 on a on a per-engine cycle basis.

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Section: Relation Of the Vibration Characteristics To Combustion Phasingmentioning

confidence: 99%

Application of accelerometers for sensing combustion phasing of an advanced combustion engine

Massey

Wagner

Drallmeier

2011

International Journal of Engine Research

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“…Antoni et al 6 used the spectral moment to detect the advance and delay of the combustion process by checking the position of the sudden rises due to combustion in each cylinder. Villarino and Bohme 7 proposed a method to estimate the peak pressure position with structure-borne sound signals from an acceleration sensor mounted on the engine's surface. Vullia et al 8 used a short-time Fourier transform to distinguish normal combustion from other sources of excitation including valve impact and injector pulses.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the vibration sensors used in the estimation of the combustion process in a diesel engine

Yong

Huang

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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The vibration signal measured from the cylinder head contains much effective information about the combustion process. The vibration signal can be measured with a vibration displacement sensor, a vibration velocity sensor or a vibration acceleration sensor. In this study the signals measured with the three sensors were compared. The comparison results showed that the vibration displacement measured from the cylinder head is mainly caused by the fixed bracket of the diesel engine, and it is difficult to extract combustion information from the vibration displacement. The vibration velocity signal was compared with the pressure increase rate. The comparison results showed that the two signals have similar trends in the main combustion process. The vibration velocity signal contains much information about combustion. The vibration acceleration signal is hardly influenced by the fixed bracket but contains the vibration response excited by the impact of the opening and closing of the valves and other impact-exciting sources. Based on the results of analyses, it can be concluded that the vibration velocity sensor is the best sensor to estimate the combustion process. The vibration velocity signal was used to estimate the timing of the start of combustion for a two-cylinder homogeneous charge compression ignition engine. The results demonstrated that the accuracy of estimation fulfils the requirement of the application.

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