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TECHNICAL PAPERS: Internal Combustion Engines

In-Cylinder Pressure Reconstruction Based on Instantaneous Engine Speed Signal

[+] Author and Article Information
D. Moro, N. Cavina, F. Ponti

University of Bologna, Viale Risorgimento 2, Bologna 40136, Italy

J. Eng. Gas Turbines Power 124(1), 220-225 (Mar 01, 2001) (6 pages) doi:10.1115/1.1391430 History: Received September 01, 2000; Revised March 01, 2001
Copyright © 2002 by ASME
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References

Figures

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In-cylinder pressure with and without combustion and “combustion pressure” when the engine is running at 2000 rpm at full load
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Pressure and indicated torque waveforms in a cycle for a single cylinder
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Instantaneous indicated torque waveforms in a cycle in the four cylinder engine under study
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Instantaneous reciprocating mass inertial torque waveforms in a cycle in the four-cylinder engine under study at 2000, 3000, and 4000 rpm
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Measured and “synthetic” engine speed at 4000 rpm and full load, for the four-cylinder in-line engine under study
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Three-dimensional surface of the in-cylinder pressure when the intake valve is closing
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In-cylinder pressure and pressure without combustion when the engine is running at 3000 rpm at full load
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“Synthetic” engine speed with normal combustion and misfire when the engine is running at 3000 rpm at full load
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“Combustion pressure” and the difference between the actual “synthetic” engine speed and the synthetic speed in case of misfire when the engine is running at 3000 rpm at full load
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Coherence function between the “combustion pressure” waveform and the difference between the actual “synthetic” engine speed and the one in case of misfire
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Intake manifold pressure versus engine speed plane
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Pressure recovery related to the point A in Fig. 11
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Pressure recovery related to the point B in Fig. 11
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Pressure recovery related to the point C in Fig. 11
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Pressure recovery related to a steady-state test in presence of a misfire at partial load

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