In this paper, the analyses of elastohydrodynamic lubrication (EHL) of crankshaft bearings considering the deformation of the whole cylinder block and crankshaft under load were carried out for the crankshaft bearing system of a four-stroke four-cylinder internal combustion engine. The lubrication of crankshaft bearing was analyzed by dynamic method. The deformation of bearing surface under pressure of oil film was calculated by compliance matrix method. The results show that when the crankshaft deformation under load is considered, compared with the results of not considering the deformation of cylinder block, the maximum film pressure decreases, the minimum film thickness increases, and the end leakage flow-rate and frictional coefficient of journal surface change little in an engine working cycle when considering the deformation of cylinder block. The models of the whole cylinder block and the single main bearing housing were used, respectively, to calculate the deformation of main bearing surface in the analyses. The results show that the calculation accuracy of the elastohydrodynamic lubrication analyses of crankshaft main bearings can be met basically by applying the simple model based on the single main bearing housing to calculate the elastic deformation of main bearing surface.

1.
Zhang
,
C.
, 1999, “
Fast Analysis of Crankshaft Bearings With a Database Including Shear Thinning and Viscoelastic Effects
,”
Tribol. Trans.
1040-2004,
42
(
4
), pp.
922
928
.
2.
Kim
,
B. J.
, 2001, “
Thermo-Elastohydrodynamic Analysis of Connecting Rod Bearing in Internal Combustion Engine
,”
ASME J. Tribol.
0742-4787,
123
, pp.
444
454
.
3.
Lahmar
,
M.
, 2002, “
The Effect of Misalignment on Performance Characteristics of Engine Main Crankshaft Bearings
,”
Eur. J. Mech. A/Solids
0997-7538,
21
(
4
), pp.
703
714
.
4.
Manoharan
,
C.
,
Arunachalam
V. P.
and
Govindarajan
,
P.
, 2004, “
Analysis of Hydrodynamic Bearing Performance in IC Engines
,” SAE Paper No. 2004-28-0011.
5.
Ma
,
M. T.
,
Loibnegger
,
B.
, and
Herster
,
P.
, 2006, “
Advanced Elastohydrodynamic Analysis of Journal Bearing in IC Engines with a Multi-body System Approach
,”
ASME Internal Combustion Engine Division 2006 Spring Technical Conference
, Aachen, Germany.
6.
Knoll
,
G.
,
Schonen
,
R.
, and
Wihlem
,
K.
, 1997, “
Full Dynamic Analysis of Crankshaft and Engine Block with Special Respect to Elastohydrodynamic Bearing Coupling
,”
ASME/ICED 1997 Spring Technical Conference
, Fort Collins, CO.
7.
Garnier
,
T.
,
Bonneau
,
D.
, and
Grente
,
C.
, 1999, “
Three-Dimensional EHD Behavior of the Engine Block/Crankshaft Assembly for a Four Cylinder Inline Automotive Engine
,”
ASME J. Tribol.
0742-4787,
121
, pp.
721
729
.
8.
Ebrat
,
O.
,
Mourelatos
,
Z.
,
Hu
,
K.
,
Vlahopoulos
,
N.
, and
Vaidyanathan
,
K.
, 2004, “
An Elastohydrodynamic Coupling on a Rotating Crankshaft and a Flexible Engine Block
,”
ASME J. Tribol.
0742-4787,
126
, pp.
233
241
.
9.
Sun
,
J.
,
Gui
,
C. L.
, and
Wang
,
Z. H.
, 2008, “
Research on Elastohydrodynamic Lubrication of a Crankshaft Bearing With a Rough Surface Considering Crankshaft Deformation
,”
Proc. Inst. Mech. Eng., D (J. Automob. Eng.)
,
222
(
12
), pp.
2403
2414
.
10.
Sun
,
J.
, 2005, “
Coupling Research on Tribology, Stiffness and Strength of Crankshaft-Bearing System
,” Ph.D. thesis, Hefei University of Technology, China.
11.
Sun
,
J.
, and
Gui
,
C. L.
, 2007, “
Effect of Lubrication Status of Bearing on Crankshaft Strength
,”
ASME J. Tribol.
0742-4787,
129
(
4
), pp.
887
894
.
12.
Wen
,
S. Z.
, 1991,
Tribology Theory
,
Publishing Company of Tsinghua University
,
Beijing
.
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