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  • An analysis of the resonance attenuation in a combustion . . .
    In this work the in-cylinder resonance attenuation in internal combustion engines during the end of combustion is analyzed and modeled in detail An approach is proposed to reproduce resonance attenuation evolution over a particular cycle
  • Another Helmholtz Resonance Post - fsae. com
    The ideal case is for the wave to reach the valves of the piston in the intake stroke right before the valves close for increased VE, and this distance can be set by selecting an RPM to optimize to and calculating the length of the runners to allow the pressure wave rebound to occur at the right time
  • A review of acoustic dampers applied to combustion chambers . . .
    To dampen pressure fluctuations and to reduce noise, acoustic dampers are widely applied as a passive control means to stabilize combustion engine systems However, they cannot respond to the dynamic changes of operating conditions and tend to be effective over certain narrow range of frequencies
  • High Compression Ratio Active Pre-chamber Single-Cylinder . . .
    Active pre-chamber turbulent jet ignition with a high compression ratio has been demonstrated to be an effective method for significantly enhancing engine thermal efficiency A dual modification of the combustion chamber and the pre-chamber was
  • Cavity resonances in engine combustion chambers and some . . .
    Current knock detection systems are tuned to the frequency band of the lowest cavity resonance in the combustion chamber It is shown in the paper that higher order resonances can also be detected by a knock vibration sensor on the surface of the engine
  • Modal Analysis of Combustion Chamber Acoustic Resonance to . . .
    Combustion noise in such a high-frequency band is often an issue in diesel engine development and is known to be due to resonance in the combustion chamber However, there are few cases of it becoming a serious issue in gasoline engines, and effective countermeasures have not been established
  • Resonance Frequencies and Damping in Combustion Chambers with . . .
    In the presence of combustion, such a clustering could lead to non-uniform heat release rate which can trigger or sustain combustion instabilities





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