The aim of this paper is to study the thermal ejfects on minimum oil film, thickness in a connecting-rod bearing. A comparison between the theoretical and experimental results of minimum oil film thickness in a connecting-rod bearing is presented. The transient energy equation is solved by adapting the adiahatic boundary condition for considering the thermal effects. The minimum oil film thicknesses are measured by the total capacitance method. The minimum oil film thickness over an engine cycle estimated with consideration of thermal effects is closer to that measures than that estimated by using the iso-viscous lubrication theory.

1.
Bates, T. W., and Benwell, S., 1988, “Effect of Oil Rheology on Journal Bearing Performance Part 3—Newtonian Oils in the Connecting-Rod Bearing of an Operating Engine,” SAE Paper No. 880679.
2.
Bates
T. W.
,
Fantino
B.
,
Launay
L.
, and
Freˆne
J.
,
1990
, “
Oil Film Thickness in an Elastic Connecting-Rod Bearing; Comparison Between Theory and Experiment
,”
STLE
, Vol.
33
, pp.
254
266
.
3.
Bates, T. W., Willamson, J. A., Spearot, J. A., and Murphy, C. K., 1986, “A Correlation Between Engine Oil Rheology and Oil Film Thickness in Engine Journal Bearings,” SAE Paper No. 860376.
4.
Boncompain, R., and Freˆne, J., 1980, “Thermohydrodynamic Analysis of a Finite Journal Bearings Static and Dynamic Characteristics,” Proceedings, 6th Leeds-Lyon Symposium, I. Mech. E., pp. 33–41.
5.
Bonneau
D.
,
Guines
D.
,
Freˆne
J.
, and
Toplosky
J.
,
1995
, “
EHD analysis, including Structural Inertia Effects and a Mass-Conserving Cavitation Model
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
117
, pp.
540
547
.
6.
Booker
J. P.
,
1965
, “
Dynamically Loaded Journal Bearings; Mobility Method of Solution
,”
ASME Journal of Basic Engineering
, Vol.
87
, No.
3
, pp.
537
546
.
7.
Booker
J. F.
,
1971
, “
Dynamically-Loaded Journal Bearings: Numerical Application of the Mobility Method
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
93
, No.
1
, pp.
168
176
.
8.
Choi, J. K., Lee, J. H., and Han, D. C., 1992, “Oil Film Thickness in Engine Main Bearings: Comparison Between Calculation and Experiment by Total Capacitance Method,” SAE Paper No. 922345, pp. 147–159.
9.
Choi, J. K., Min, B. S., and Han, D. C., 1993, “Effect of Oil Aeration Rate on the Minimum Oil Film Thickness and Reliability of Engine Bearing,” SAE Paper No. 932785.
10.
Craig, R. C., King, W. H., and Appeldoorn, J. K., 1982, “Oil Film Thickness in a Bearing of a Fired Engine, Part II: The bearing as a Capacitor,” SAE Paper No. 821250.
11.
Dowson
D.
,
Hudson
J.
,
Hunter
B.
, and
March
C.
,
1966
, “
An Experimental Investigation of the Thermal Equilibrium of Steadily Loaded Journal Bearings
,”
Proc. Instn. Mech. Engrs.
, Vol.
181, 3B
, pp.
70
70
.
12.
Fantino
B.
,
Freˆne
J.
, and
Du Parquet
J.
,
1979
, “
Elastic Connecting-Rod Bearing With a Piezoviscous Lubricant; Analysis of the Steady-State Characteristics
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
101
, pp.
190
200
.
13.
Fantino
B.
, and
Freˆne
J.
,
1985
, “
Comparison of Dynamic Behavior of Elastic Connecting-Rod Bearing in Both Petrol and Diesel Engine
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
107
, pp.
87
91
.
14.
Filowitz, M. S., King, W. H., and Appeldoorn, J. K., 1982, “Oil Film Thickness in a Bearing of a Fired Engine,” SAE Paper No. 820511.
15.
Goenka
P. K.
,
1984
, “
Dynamically Loaded Journal Bearings: Finite Element Method Analysis
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
106
, pp.
429
439
.
16.
Han, D. C., 1979, “Statische und dynamische Eigenschaften von Gleitlagern bei hohen Umfangsgeschwindigkeiten und bei Verkantung,” Dissertation, Universita¨t Karlsruhe.
17.
Hoffman, K. A., and Chiang, S. T., 1993, “Computational Fluid Dynamics for Engineers,” Engineering Education System, Wichita, pp. 288–341.
18.
Hussain
A.
,
Mistry
K.
,
Biswas
S.
, and
Athre
A.
,
1996
, “
Thermal Analysis of Noncircular Bearings
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
118
, pp.
246
254
.
19.
Khonsari
M. M.
, and
Wang
S. H.
,
1992
, “
Notes on Transient THD Effects in a Lubricating Film
,”
STLE
, Vol.
35
, pp.
177
183
.
20.
Launay, J., Freˆne, J., and Fantino, B., 1990, “Effect of the Mechanical Linkage Used for Measurement Purpose on Dynamic Behaviour of an Elastic Connecting-Rod Bearing,” Proceedings, 17th Leeds-Lyon Symposium, Elsevier, pp. 63–68.
21.
McCallion
H.
,
Yousif
F.
, and
Lloyd
T.
,
1970
, “
The Analysis of Thermal Effects in a Full Journal Bearings
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
92
, pp.
578
587
.
22.
Moes
H.
,
Ten Hoeve
P. B. Y.
, and
Van der Helm
J.
,
1989
, “
Thermal Effects in Dynamically Loaded Flexible Journal Bearings
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
111
, pp.
49
55
.
23.
Paranjpe
R. S.
,
1992
, “
Analysis of Non-Newtonian Effects in Dynamically Loaded Finite Journal Bearings Including Mass Conserving Cavitation
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
114
, OCTOBER, pp.
736
744
.
24.
Paranjpe
R. S.
,
1996
, “
A Study of Dynamically Loaded Engine Bearings Using a Transient Thermohydrodynamic Analysis
,”
STLE
, Vol.
39
, No.
3
, pp.
636
644
.
25.
Pollman
E.
,
1966
, “
Use of Similarity Number in Connection with Plain Bearings Under Conditions of Varying Temperature and Viscosity
,”
Proc. Instn. Mech. Engrs.
, Vol.
181
, No.
30
, pp.
144
144
.
26.
Shiao, Y. J., and Moskwa, J. J., 1993, “An Investigation of Load Force and Dynamic Error Magnitude Using the Lumped Mass Connecting Rod Model,” SAE Paper No, 930617.
27.
Smith, E. H., 1982, “Temperature Variations in Crankshaft Bearings,” Proceedings, 9th Leeds-Lyon Symposium, Butterworths, pp. 97–102.
28.
Spearot, J. A., and Murphy, C. K., 1988, “A Comparison of the Total Capacitance and Total Resistance Techniques for Measuring the Thickness of Journal Bearing Oil Films in an Operating Engine,” SAE Paper No. 880680.
29.
Suzuki, S., Ozasa, T., Yamamoto, M., Nozawa, Y., Noda, T., and Ohori, M., 1995, “Temperature Distribution and Lubrication Characteristics of Connecting Rod Big End Bearings,” SAE Paper No. 953550, pp. 149–158.
30.
Vijayaraghavan, D., Brewe, D. E., and Keith, T. G., 1990, “Non-Linear Transient Analysis of Diesel Engine Connecting-Rod Bearing with Circular and Non-Circular Profiles,” Proceedings, 17th Leeds-Lyon Symposium, Elsevier, pp. 81–89.
31.
Vijayaraghavan
D.
, and
Brewe
D. E.
,
1992
, “
Frequency Effects on the Stability of a Journal Bearing for Periodic Loading
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
114
, pp.
107
115
.
This content is only available via PDF.
You do not currently have access to this content.