Sage Journals: Discover world-class research

Abstract

It is necessary to understand the overall system including engine, torque converter, multiplate clutch, band brake, one-way clutch, planetary gears, road load and tyre to analyse the performance of the vehicle powertrain. The performance of the powertrain can be analysed using dynamic models including transient characteristics and the equations of motion are derived from the dynamic models of the powertrain. In this study, the shift transient characteristics of the vehicle equipped with a Ravigneaux-type planetary gears automatic transmission has been investigated. A shift control using engine torque reduction and optimum pressure trajectory has also been investigated in order to enhance transient characteristics during shift.

Keywords

automatic transmission Ravigneaux-type planetary gear set shift transient characteristics shift quality index pressure trajectory torque phase inertia phase parametrization axle torque clutch stroke time production type

Get full access to this article

View all access options for this article.

References

Gillespie

T. D.

Fundamentals of Vehicle Dynamics, 1992 (Society of Automotive Engineers, New York).

Bakker

Nyborg

Pacejka

H. B.

Tyre modeling for use in vehicle dynamics studies. SAE paper 870421, 1987, pp. 2190–2204.

Kotwicki

A. J.

Dynamic models for torque converter equipped vehicles. SAE paper 820393, 1982.

Design Practices: Passenger Car Automatic Transmissions, 3rd edition, 1994 (Society of Automotive Engineers, New York).

Wong

J. Y.

Theory of Ground Vehicles, 2nd edition, 1993 (John Wiley, New York).

Kim

S.-J.

The development of the software for the powertrain design using graphical user interface. KSAE paper 96370133, 1996, pp. 205–215.

Yoon

Khargonekar

Design of computer experiments for open-loop control and robustness analysis of clutch-to-clutch shifts in automatic transmissions. In Proceedings of the American Control Conference, 1997, pp. 3359–3364.

Schwab

L. F.

Development of a shift quality metric for an automatic transmission. SAE paper 941009, 1994, pp. 1402–1407.

A study of shift control using the clutch pressure pattern in automatic transmission

Abstract

Abstract

Keywords

Get full access to this article

References