NVH and reliability analyses of the engine with different interaction models between the crankshaft and bearing

He, Zhenpeng; Gong, Wenqin; Xie, Weisong; Zhang, Junhong; Zhang, Guichang; Hong, Zhenyu

doi:10.1016/j.apacoust.2015.07.014

Cited by 11 publications

(7 citation statements)

References 19 publications

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“…To improve the tribo-performance of the crankpin bearings (CBs) of the engine, the influence of the dynamic parameters on the slider-crank mechanism and the CB was investigated. [1][2][3][4][5] The studies indicated that the mass and length of the connecting rod greatly affected the triboperformance of the piston-liner system while the impacting force of the connecting rod on the CB significantly affected the lubrication and friction of the CB. Besides, the gap and surface roughness of the CB also influenced its tribo-performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of shape/size and distribution of microgeometries of textures on tribo-performance of crankpin bearing

Nguyen

Jiao

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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The effect of the shape/size and distribution of microgeometries of textures on improving the tribo-performance of crankpin bearing is proposed. Based on a combined model of the slider-crank mechanism dynamic and hydrodynamic lubrication, the distribution density, area density, and shape of spherical textures, square-cylindrical textures, wedge-shaped textures, and a hybrid between spherical texture and square-cylindrical texture on the crankpin bearing's tribo-performance are investigated under different operating conditions of the engine. The tribological characteristic of the crankpin bearing is then evaluated via the indexes of the oil film pressure p, asperity contact force, friction force, and friction coefficient of the crankpin bearing. The research results show that the distribution density with n = 12 and m = 6, and area density with α = 30% of various microtextures have an obvious effect on ameliorating the crankpin bearings tribo-performance. Concurrently, at the mixed lubrication region, the shape of the square-cylindrical texture on improving the tribo-performance is better than the other shapes of the spherical texture, wedge-shaped texture, and spherical and square-cylindrical texture. Particularly, all the average values of the asperity contact force, friction force, and friction coefficient with a square-cylindrical texture are significantly reduced by 14.6%, 19.5%, and 34.5%, respectively, in comparison without microtextures. Therefore, the microtextures of the spherical texture applied on the bearing surface can contribute to enhance the durability and decrease the friction power loss of the engine.

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Section: Introductionmentioning

confidence: 99%

Effect of shape/size and distribution of microgeometries of textures on tribo-performance of crankpin bearing

Nguyen

Jiao

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…However, the levels of the vibration, noise, as well as friction power loss of the internal combustion engine were still high [5,6]. This is also due in part to the effect of the piston skirt and washers against the cylinder borehole during the movement and relative movement of the slider crank mechanism (SCM) [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The influence of the SCM structure parameters on the engine vibration and optimization the engine power

Yan¹,

Nguyen²

2021

J., mech. eng. autom., control. syst.

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In this paper, based on the slider-crank-mechanism (SCM) dynamics model, the dynamic parameters of the engine including the eccentricity () between crankshaft centre and cylinder centre of the SCM, the length and radius of the connecting rod and crankshaft, and engine speed are researched on the engine vibration and power, respectively. The dynamic parameters are then optimized based on the multi-objective genetic algorithm developed in MATLAB software to improve the vibration and power of the engine. Both the values of the maximum friction force and maximum torque are chosen as the objective functions. The research results show that the length of the connecting rod (), radius of the crankshaft (), eccentricity , and engine speed () significantly affect the vibration and power of the engine. With the optimized dynamic parameters of 136 mm, 45 mm, 14 mm, and 1850 rpm, the amplitude of oscillation of piston acceleration and the maximum friction force are reduced by 36.3 % and 12.5 % while the maximum torque is increased by 18.6 % in comparison without optimization. Therefore, the vibration and power of the engine are improved.

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“…The research results indicated that the ICE's power and its fuel economy had been substantially improved. However, the level of the noise, vibration as well as friction of the ICE were still high [4][5][6]. This was also due to a part of the effect of the piston skirt and rings against the cylinder bore in the motion process and the relative motion of the slider-crank mechanism (SCM) [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A sensitivity analysis of SCM dynamic parameters on improving the engine vibration and power

Wen-lin¹

2021

Vib. proced.

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To improve the vibration and power of the engine, a sensitivity analysis of the operating parameters as well as the eccentricity between crankshaft centre and cylinder centre of the slider-crank-mechanism (SCM) are proposed and researched based on the SCM's dynamics model and the experimental data of the cylinder pressure in the internal combustion engine. An algorithm program developed in MATLAB environment is then applied to compute the dynamic equations of the SCM. The numerical simulation results show that the eccentricity , connecting rod length , and crankshaft radius are substantially affected the vibration and power of the engine. Particularly, with-0.01, the connecting rod length of {1.0-1.2}× , and crankshaft radius of {1.0-1.2}× could improve the vibration and increase the engine power.

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NVH and reliability analyses of the engine with different interaction models between the crankshaft and bearing

Cited by 11 publications

References 19 publications

Effect of shape/size and distribution of microgeometries of textures on tribo-performance of crankpin bearing

Effect of shape/size and distribution of microgeometries of textures on tribo-performance of crankpin bearing

The influence of the SCM structure parameters on the engine vibration and optimization the engine power

A sensitivity analysis of SCM dynamic parameters on improving the engine vibration and power

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