Sage Journals: Discover world-class research

Abstract

Factorial design is applied to a wet clutch in automatic transmission in order to study and predict the effects of operating conditions on its engagement. The analysis relies on a series of experimental measurements and computer simulations to compute process responses. Included in the simulations are the drive torque, friction coefficient, system inertia, applied load, engagement time, developed energy, maximum brake torque, maximum power requirement and maximum temperature rise. Analysis of variance (ANOVA) is performed to quantify realistically the main and interaction effects of the system parameters on process responses.

ANOVA results are effectively compiled into charts complemented with prediction models, which could be used as a valuable tool to facilitate learning for a novice trainee and to allow a designer to evaluate quickly and effectively the effects of operating conditions on, and prediction of, performance parameters. The scope of this analysis tool, as applied to wet-clutch engagement, is not limited to operating conditions and could be extended to include materials selection, and to explore ideas not yet fully tested.

Keywords

Automotive transmission wet clutch engagement wet clutch engagement factorial design analysis of variance (ANOVA)

Get full access to this article

View all access options for this article.

References

El-Sherbiny

M. G.

Newcomb

T. P.

Numerical simulation of the engagement characteristics of a wet clutch

Proc. Instn Mech. Engrs, 1977, C 63/77, 81–92.

Zagrodzki

Numerical analysis of temperature fields and thermal stresses in the friction discs of a multidisc wet clutch

Wear, 1985, 101, 255–271.

Zagrodzki

Analysis of thermomechanical phenomena in multidisc clutches and brakes

Wear, 1990, 140, 291–308.

Zagrodzki

Influence of design and material factors on thermal stresses in multiple disc wet clutches and brakes

SAE Trans. 1991, 100 (2), 395–405.

Natsumeda

Miyoshi

Numerical simulation of engagement of paper based wet clutch facing

Trans. ASME, J. Tribology, 1994, 1 (16), 232–237.

Yang

Lam

R. C.

Chen

Y. F.

Yabe

Modeling of heat transfer and fluid hydrodynamics for a multidisc wet clutch. SAE technical paper 950898, 1995.

Yang

Lam

R. C.

Fujii

Prediction of torque response during the engagement of wet friction clutch. SAE technical paper 981097, 1998.

Berger

E. J.

Sadeghi

Krousgrill

C. M.

Finite element modeling of engagement of rough and grooved wet clutches

J. Tribology, 1996, 118, 137–146.

Berger

E. J.

Sadeghi

Krousgrill

C. M.

Analytic and numerical modeling of engagement of rough, permeable, grooved wet clutches. STLE preprint 96-TRIB-3, 1996.

10.

Holgerson

Apparatus for measurement of engagement characteristics of a wet clutch

Wear, 1997, 213, 140.

11.

Holgerson

Friction and temperature characteristics of wet clutch engagement. Licentiate thesis, LuleÅ University of Technology, LuleÅ, Sweden, 1997.

12.

Jang

J. Y.

Khonsari

M. M.

Thermal characteristics of a wet clutch

Trans. ASME, J. Tribology, 1999, 121, 610–618.

13.

Mansouri

Holgerson

Khonsari

M. M.

Aung

Thermal and dynamic characterization of wet clutch engagement with provision for drive torque

Trans. ASME, J. Tribology, 2001, 123 (2), 313–323.

14.

Montgomery

D. C.

Design and Analysis of Experiments, 1997 (John Wiley, New York).

Application of analysis of variance to wet clutch engagement

Abstract

Abstract

Keywords

Get full access to this article

References