Dynamics and Lubrication Problem Analysis of Main Bearings for IC Engines Based on Coupling between a Crankshaft and a Flexible Whole Engine Block

Rozhdestvensky, Yu.; Khozeniuk, N.; Surovtsev, S.

doi:10.24874/ti.2018.40.01.13

Cited by 4 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For displacement of the piston with displacement: The forces 1 P and 2 P are create by the pressure of the gases as they expand in the combustion chamber of the engine. The value and the change in gas pressure in the combustion chamber defined by the equation polytropic expansion [11,12]:…”

Section: Methodsmentioning

confidence: 99%

Research of the efficiency using the model of the spatial hinge in an internal combustion engine

Mishchuk¹,

Gorbatyuk²,

Mishchuk³

2022

GBDMM

View full text Add to dashboard Cite

An internal combustion engine is a heat system for many kinds of use in the field of engineering. The difficult economic situation around petroleum products, which is associate with their deficit and modern environmental safety standards require switching to alternative energy sources and looking for ways to modernize internal combustion engines to increase their efficiency. A large number of internal combustion engines belong to the crank group. The analysis of the crank group showed their low technical efficiency. When the piston is in the upper position at the time of ignition of the combustible mixture in the cylinder, the maximum pressure occurs. This leads to maximum driving force with a minimum crank angle. Also increases the friction of the piston on the cylinder wall, the wear of the cylinder wall, additional local heating of the surface of the cylinder and over-load of the crankshaft. Thus, a decrease in the net power resulting from the combustion of fuel in the engine occurs. To increase the efficiency of the crank mechanism, it is propose to apply a new design of the torque transmission mechanism in the engine, which will be built based on a spatial hinge. This paper presents a study of the power and kinematic parameters of the spatial hinge of an internal combustion engine.

show abstract

Section: Methodsmentioning

confidence: 99%

Research of the efficiency using the model of the spatial hinge in an internal combustion engine

Mishchuk¹,

Gorbatyuk²,

Mishchuk³

2022

GBDMM

View full text Add to dashboard Cite

show abstract

“…Analysis of crankshaft has also been performed, and its analysis proves to be safe in the given working conditions. Rozhdestvensky et al [8] present the solution to the interconnected problem of main bearings dynamics for the forced internal combustion (IC) engine. It analyses not only the influence of macro geometry parameters of each main bearing and the influence of non-Newtonian properties of lubricant but also the elastic characteristics of a crankshaft and crankcase and supports displacements caused by thermal deformation of an engine crankcase.…”

Section: Introductionmentioning

confidence: 99%

Effects of Bearing Steps on Probable Wear Damage of Main Bearings of an IC Engine

Karimaei

Chamani

2021

IJAME

View full text Add to dashboard Cite

When two bearing shells are assembled in the bearing housing, it is possible that the edges of the two shells do not fit in the radial direction completely and have an offset relative to each other. This assembly error, which can have different causes, is called the bearing step in this paper. The bearing step can lead to wear damage in bearings. The effects of bearing step on the lubrication performance of main bearings and the probable wear damage have been investigated. To calculate the bearing lubrication characteristics such as maximum oil film pressure and minimum oil film thickness, elasto-hydrodynamic model, which includes the mass conservation algorithm, has been applied. The objective of this work is to investigate the effects of bearing steps on the lubrication performance of the main bearings and assess the probable wear damage of main bearings due to bearing step. The prediction of elasto-hydrodynamic model is very proximate to what really happened. The results show that for the under-study 12-cyl engine, main bearing No. 2 involved with medium wear damage. Wear damage in this main bearing No. 3 is not a concern, while main bearing No.4, 5 and 6 do not predict the probability of wear damage. For main bearing No.7, it is concluded that considering step and bore relief in simulation has high importance so that the solution without step and bore relief does not predict the wear, but with step and bore relief predicts medium wear damage.

show abstract

“…Analysis of crankshaft has also been performed, and its analysis proves to be safe in the given working conditions. Rozhdestvensky et al [10] present the solution to the interconnected problem of main bearings dynamics for the forced internal combustion (IC) engine. It analyses not only the influence of macro geometry parameters of each main bearing and the influence of non-Newtonian properties of lubricant but also elastic characteristics of a crankshaft and crankcase and supports displacements caused by the thermal deformation of an engine crankcase.…”

Section: Introductionmentioning

confidence: 99%

Effect of Crankshaft and Crankcase Material Stiffness on Load Distribution in Main Bearings

Karimaei

Chamani

2018

IJAME

View full text Add to dashboard Cite

In multi-cylinder diesel engines, hydrodynamic pressure distribution of main bearings has significant effect on the load distribution applied on engine crankcase, therefore, has an effect on the stress distribution and deflection of crankcase. Flexibility of crankshaft and crankcase assembly has significant effect on load distribution in engine main bearings. In this paper, the effect of elastic deformations of both crankshaft and crankcase on the load distribution in the main bearings is studied. Considering deformations of crankcase and crankshaft together with the elasto-hydrodynamic (EHD) analysis of main bearing is vital to obtain the realistic load distribution and accurate main bearing performance. At the beginning, the results of flexible body dynamic analysis of engine crank train with considering EHD joint for main bearings are presented and the main bearing force and moment are compared with rigid body dynamic analysis. Then, the effects of crankshaft and crankcase flexibilities on main bearing force and moment are studied. Several models with different flexibilities and stiffness of crankcase and crankshaft were prepared using Elasto-hydrodynamic simulation of diesel engine main bearings. According to the results, the load distribution on the engine main bearings and consequently the bearing shell deformation are affected by crankcase and crankshaft elasticities. A fast and time-saving method to obtain reasonably accurate results is proposed in the present paper.

show abstract

Dynamics and Lubrication Problem Analysis of Main Bearings for IC Engines Based on Coupling between a Crankshaft and a Flexible Whole Engine Block

Cited by 4 publications

References 10 publications

Research of the efficiency using the model of the spatial hinge in an internal combustion engine

Research of the efficiency using the model of the spatial hinge in an internal combustion engine

Effects of Bearing Steps on Probable Wear Damage of Main Bearings of an IC Engine

Effect of Crankshaft and Crankcase Material Stiffness on Load Distribution in Main Bearings

Contact Info

Product

Resources

About