Sage Journals: Discover world-class research

Abstract

In this work, theoretical and experimental results related to the power flow and efficiency of a power split continuously variable transmission (PS-CVT) system are reported. By means of two separate phases of operation, an original solution is studied that allows an increase in the transmission efficiency through the generation of a flow without recirculation of power. The experimental results related to the second phase of operation of the PS-CVT are reported. Such results are compared with those found through a theoretical model of the transmission. The advantages in terms of efficiency in comparison with a traditional CVT system are shown. A possible operational scheme for the PS-CVT is finally reported through which it is possible to increase the ratio range by means of a cyclical repetition of the operational phases.

Keywords

continuous variable transmission power split infinitely variable transmission power transmission efficiency test rig

Get full access to this article

View all access options for this article.

References

Continuously variable transmissions for passenger cars. SAE special publication SAE/PT-87/30, 1987.

Paul

CVTs driving the future of transmission technology. In International Congress on Continuously Variable Transmission (CVT′99), 1999, pp. 1–8.

Machida

Miyata

Imanishi

Tanaka

High performance traction drive CVT on the compact car for the 21st century. In Proceedings of 1998 Fisita World Congress, 1998, F98T147.

Hohn

B. R.

Pinnekamp

The Autark Hybrid: a universal power train concept for passenger cars. In International Gearing Conference, 1994, pp. 253–258.

Machida

Traction drive CVT up to date. In International Congress on Continuously Variable Transmission (CVT′99), 1999, pp. 71–76.

Carbone

Mangialardi

Mantriota

Theoretical model of metal V-belt drives during ratio changing speed. Trans. ASME, J. Mech. Des., 2001, 123, 111–117.

Carbone

Mangialardi

Mantriota

Comments on axial thrust and torque of metal V-belt drives in transient conditions. Trans. ASME, J. Mech. Des. (submitted).

Vahabzadeh

Macey

J. P.

Dittrich

A split-torque, geared-neutral infinitely variable transmission mechanism. In Proceedings of 23rd Fisita International Congress, 1990, Vol. 1, pp. 687–695.

Kmicikiewicz

Cowan

Arques

Continuously variable power split transmission. In International Congress on Continuously Variable Transmission (CVT′99), 1999, pp. 42–51.

10.

Yamada

Parametric modeling and analysis of IVT. In International Congress on Continuously Variable Transmission (CVT′99), 1999, pp. 136–141.

11.

Mangialardi

Mantriota

Comments on: Maximum mechanical efficiency infinitely variable transmissions. Mechanism and Mach. Theory, 1998, 33(4), 443–447.

12.

Mangialardi

Mantriota

Power flows and efficiency in infinitely variable transmissions. Mechanism and Mach. Theory, 1999, 34, 973–994.

13.

Mantriota

Power split continuously variable transmission systems with high efficiency. Proc. Instn Mech. Engrs, Part D, Journal of Automobile Engineering, 2001, 215(D3), 357–368.

14.

Mantriota

Theoretical and experimental study of power split continuously variable transmission systems. Part 1. Proc. Instn Mech. Engrs, Part D, Journal of Automobile Engineering, 2001, 215(D7), 837–850.

15.

Pennestrì

Freudenstein

The mechanical efficiency of epicyclic gear trains. Trans. ASME, J. Mech. Des., 1993, 115, 645–651.

Theoretical and experimental study of a power split continuously variable transmission system Part 2

Abstract

Abstract

Keywords

Get full access to this article

References