Effect of Cylinder Lubrication on Piston Slap

Gerges, Samir N. Y.; Luca, Julio Cesar de; Lalor, N.

doi:10.4271/2005-01-2165

Cited by 3 publications

(2 citation statements)

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“…The impact impedance has been used at each contact point between the piston and the cylinder liner in order to predict the surface vibrations of the engine block. In some practical approaches, a transfer function has been established experimentally to describe the noise attenuation characteristics through the engine block [9,19].…”

Section: List Of Symbolsmentioning

confidence: 99%

“…Later, a coefficient of friction was included in the equations of motion to account for the frictional losses [17]. In order to add the effect of lubricant film damping, spring-damper arrangements in parallel and/or in series have been considered [12,[18][19][20]. A more accurate representation of lubricant behaviour is obtained through the solution of Reynolds equations [15,16,21].…”

Section: Introductionmentioning

confidence: 99%

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A transient tribodynamic approach for the calculation of internal combustion engine piston slap noise

Dolatabadi

Littlefair

Cruz

et al. 2015

Journal of Sound and Vibration

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a b s t r a c tAn analytical/numerical methodology is presented to calculate the radiated noise due to internal combustion engine piston impacts on the cylinder liner through a film of lubricant. Both quasi-static and transient dynamic analyses coupled with impact elastohydrodynamics are reported. The local impact impedance is calculated, as well as the transferred energy onto the cylinder liner. The simulations are verified against experimental results for different engine operating conditions and for noise levels calculated in the vicinity of the engine block. Continuous wavelet signal processing is performed to identify the occurrence of piston slap noise events and their spectral content, showing good conformance between the predictions and experimentally acquired signals.

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confidence: 99%