Gasoline Engine Piston Pin Tick Noise

Moshrefi, Nasser; Mazzella, Gary; Yeager, Dave; Homco, Steve

doi:10.4271/2007-01-2290

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…Both of these factors have a strong impact on the actual piston-pin clearance which does not only change strongly in magnitude but also becomes noncircular. This change in clearance can not only affect piston-pin friction [32] and wear, but might also lead to a strongly increased noise emission [33,34].…”

Section: Thermoelastic Simulation Of the Pistonmentioning

confidence: 99%

Piston-Pin Rotation and Lubrication

Allmaier

Sander

2020

Lubricants

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The rotational dynamics and lubrication of the piston pin of a Gasoline engine are investigated in this work. The clearance plays an essential role for the lubrication and dynamics of the piston pin. To obtain a realistic clearance, as a first step, a thermoelastic simulation is conducted for the aluminum piston for the full-load firing operation by considering the heat flow from combustion into the piston top and suitable thermal boundary conditions for the piston rings, piston skirt, and piston void. The result from this thermoelastic simulation is a noncircular and strongly enlarged clearance. In the second step, the calculated temperature field of the piston and the piston-pin clearance are used in the simulation of the piston-pin journal bearings. For this journal bearing simulation, a highly advanced and extensively validated method is used that also realistically describes mixed lubrication. By using this approach, the piston-pin rotation and lubrication are investigated for several different operating conditions from part load to full load for different engine speeds. It is found that the piston pin rotates mostly at very slow rotational speeds and even changes its rotational direction between different operating conditions. Several influencing effects on this dynamic behaviour (e.g., clearance and pin surface roughness) are investigated to see how the lubrication of this crucial part can be improved.

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Section: Thermoelastic Simulation Of the Pistonmentioning

confidence: 99%

Piston-Pin Rotation and Lubrication

Allmaier

Sander

2020

Lubricants

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“…The essence of this noise must be analyzed, so as to find an appropriate control method. Moshrefi et al 12 proposed an experimental method to quantitatively evaluate the ticking of piston pin in order to verify the design scheme. Ticking was primarily caused by the impact between the piston pin and the connecting rod small head bearing.…”

Section: Introductionmentioning

confidence: 99%

Investigation and control of the ticking noise of the full floating piston pin

Yang³

et al. 2023

Advances in Mechanical Engineering

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The focus of this work is to investigate the ticking noise produced by the vibro-impacts between piston pin and connecting rod small head bearing. Numerical calculation and experimental verification methods were adopted and a novel method to control this intermittent noise was proposed. The dynamic model of crankshaft connecting rod piston with full floating piston pin was established and the essence of piston pin ticking was analyzed. The occurrence time of the ticking corresponded to the crankshaft angle when the resultant force of piston pin passed through the 0 axis. At the moment of impact, the peak hydraulic pressure of lubricating oil was found to be proportional to the impact strength. In order to suppress this noise, the oil groove on the bearing was designed considering the minimum oil film. After adding the oil groove, the impact intensity was significantly reduced and the noise was even eliminated. The calculated results were in good agreement with the experimental tests, and the research of this work provided a reference for controlling the ticking noise of piston pin.

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“…An early research into piston pin was conducted by Burrell and Butler (1953) to prevent its knock on the cylinder liner. Moshrefi et al (2007) found that there exists a significant vibration of the piston pin with high speed. In 2015, a new secondary motion equation of the piston was proposed, into which the cylinder vibration along the radial direction of the piston pin are incorporated (Meng et al , 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of axial piston pin motion on tribo-dynamics of piston skirt-cylinder liner system

Meng

Wang

et al. 2018

ILT

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Purpose The purpose of this study is to investigate the effects of the axial piston pin motion on the tribological performances of the piston skirt and cylinder liner vibration for an internal combustion engine (ICE) under different operation conditions. Design/methodology/approach The dynamic equation for the piston incorporating into axial piston pin motion is derived first. Then, the proposed equation and associated lubrication equations are solved using the Broyden algorithm and difference method, respectively. Moreover, the axial motion of the piston pin and its slap on the cylinder liner are studied under different operation conditions. Findings The axial piston pin motion leads to an overall increase in the friction power consumption. Increments in the ICE speed and lubricant viscosity can augment the axial pin motion and cylinder liner vibration, especially in the power stroke. The said increments cause the instability of the piston motion in the cylinder. The axial motion of piston pin can be restrained through the eccentricity of the piston pin close to the thrust side of the cylinder liner. Originality/value This study conducts detailed discussions of the effect of axial piston pin motion on tribological and dynamic performances for piston skirt-cylinder liner system of an internal combustion engine and gives a helpful reference to analyses and designs of internal combustion engines.

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Gasoline Engine Piston Pin Tick Noise

Cited by 5 publications

References 1 publication

Piston-Pin Rotation and Lubrication

Piston-Pin Rotation and Lubrication

Investigation and control of the ticking noise of the full floating piston pin

Effect of axial piston pin motion on tribo-dynamics of piston skirt-cylinder liner system

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