Internal Combustion Engine Bearings Lubrication in Hydrodynamic Bearings

Dominique Bonneau is Professor Emeritus specializing in the numerical modelization of lubrication problems who has worked as a teacher-researcher at the IUT of Angoulême and at the Institute PPRIME (Laboratory of Mechanics of Solids) of the University of Poitiers-CNRS-ENSMA in France.Aurelian Fatu is Professor and a researcher at the Institute PPRIME specializing in the modeling of problems of lubrication for engine bearings and for systems' sealing devices.Dominique Souchet specializes in the modeling of thermo-hydrodynamic lubrication of journal and thrust bearings with Newtonian or non-Newtonian fluids. He is a university lecturer and researcher at the Institute PPRIME.

• PREFACE ixNOMENCLATURE xiCHAPTER 1. KINEMATICS AND DYNAMICS OF CRANK SHAFT–CONNECTING ROD–PISTON LINKAGE 11.1. Kinematic model of crank shaft–connecting rod–piston linkage 21.1.1. Model description 21.1.2. Expressions of angular velocities 51.1.3. Expressions of velocity for points A, G2 and B 51.1.4. Expressions of connecting rod angular acceleration and points G2 and B accelerations 71.2. Efforts in the links between the crank shaft, the connecting rod and the piston 81.2.1. Hypothesis and data 81.2.2. Dynamics equations for the piston 91.2.3. Dynamics equations for the axis 91.2.4. Dynamics equations for the connecting rod 101.2.5. Dynamics equations for the crank shaft 111.2.6. Efforts for frictionless links 121.3. Load diagram correction in the case of large deformations 131.3.1. Kinematics of crank shaft–connecting rod–piston system with mobility 141.3.2. Dynamics of crank shaft–connecting rod–piston system with mobility 201.4. Examples of link efforts between the elements of crank shaft–connecting rod–piston system 231.4.1. Data 231.4.2. Load diagrams for the connecting rod big end bearing 241.4.3. Load diagrams for a connecting rod small end bearing 261.4.4. Load diagrams for a crank shaft main bearing 271.4.5. Engine torque 281.5. Bibliography 29CHAPTER 2. THE CRANK SHAFT–CONNECTING ROD LINK 312.1. Geometrical and mechanical characteristics of the connecting rod big end bearing 312.2. Lubricant supply 332.3. Correction of the load diagram in the case of large deformations 342.4. Multibody models 382.4.1. Interfaces and interactions: main assumptions 392.4.2. Equations of unilateral contact with friction and equilibrium equations 412.4.3. Compliance matrices 422.4.4. Finite element modeling of the contact in the joint plane 462.4.5. Modelization of the contact between the housing and the shells 652.5. Case of V engines 722.6. Examples of connecting rod big end bearing computations 792.6.1. Presentation of connecting rods and corresponding load diagrams 802.6.2. Geometry and lubricant data 842.6.3. Analysis of some isothermal results 852.6.4. Influence of mesh downsizing 962.6.5. Search of potential damage zones due to cavitation 982.6.6. Examples taking into consideration thermoelastohydrodynamic effects 1002.7. Bibliography 118CHAPTER 3. THE CONNECTING ROD–PISTON LINK 1233.1. Geometrical particularities and mechanics of connecting rod–piston link 1233.2. Lubricant supply 1253.3. Example of computation for a connecting rod small end bearing with the axis embedded into the piston 1273.4. Complete model of the connecting rod–piston link 1333.4.1. Equations 1343.4.2. Integration of dynamics equation 1373.4.3. Piston structural model 1393.4.4. Example: the piston–axis–connecting rod small end link for a Formula 1 engine 1423.5. Bibliography 158CHAPTER 4. THE ENGINE BLOCK–CRANK SHAFT LINK 1614.1. Geometrical and mechanical particularities of the engine block – crank shaft link 1614.2. Lubricant supply 1624.3. Calculus of an isolated crank shaft bearing 1634.4. Complete model of the engine block – crank shaft link 1704.4.1. Model presentation 1714.4.2. Expression of the elastic deformations 1734.4.3. Expression of the film thickness 1754.4.4. Equation system 1754.4.5. Resolution method 1784.4.6. Examples 1804.5. Bibliography 196CHAPTER 5. INFLUENCE OF INPUT PARAMETERS AND OPTIMIZATION 1975.1. Design of experiments method 1975.2. Identification of the input parameters: example 2015.3. Multiobjective optimization 2025.4. Optimization of a connecting rod big end bearing: example 2045.4.1. Viscosity factors 2085.4.2. Radial clearance factor 2095.4.3. Radial shape defect 2095.4.4. Axial shape defect 2105.4.5. Shell bore relief factors 2105.4.6. Supply pressure and temperature 2105.4.7. Power loss 2115.4.8. Contact pressure velocity factor 2115.4.9. Severity criterion based on the minimum film thickness 2125.4.10. Leakage 2135.4.11. Global functioning temperature 2145.4.12. Bearing optimization method 2145.5. Bibliography 221INDEX  223