Technical Brief

Theory and Application on Power-Cycling Variable Transmission System

[+] Author and Article Information
Huan Wang

State Key Laboratory of Mechanical Transmission,
Chongqing University,
Chongqing 400044, China
e-mail: huanwang@cqu.edu.cn

Dongye Sun

State Key Laboratory of Mechanical Transmission,
Chongqing University,
Chongqing 400044, China
e-mail: dysun@cqu.edu.cn

1Corresponding author.

Contributed by the Power Transmission and Gearing Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received July 4, 2016; final manuscript received October 18, 2016; published online December 12, 2016. Assoc. Editor: Hai Xu.

J. Mech. Des 139(2), 024501 (Dec 12, 2016) (6 pages) Paper No: MD-16-1485; doi: 10.1115/1.4035055 History: Received July 04, 2016; Revised October 18, 2016

Hydrodynamic drives, hydraulic drives, and friction drives have the common characteristics of continuously variable ratio but lower efficiency in comparison with gear meshing drive. A novel method for the design of power-cycling variable transmission (PCVT) has been proposed, which has the characteristics of continuously variable ratio and high efficiency in the whole working range. First, the power-cycling phenomena of powertrain system have been analyzed, and the basic configuration of PCVT system has been put forward. The feasible judgment criteria and the basic design principle of PCVT system are provided. The calculation formulas of speed ratio characteristic and efficiency characteristic of PCVT system are also derived. At last, the design patterns of PCVT system have been provided for illustrating the unique performance of PCVT system.

Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.


Murin, J. , 2005, “ Some Properties of a Diesel Drive Line With Hydrodynamic Torque Converters of the Latest Generation,” Mech. Mach. Theory, 40(1), pp. 99–117. [CrossRef]
Pettersson, K. , and Krus, P. , 2013, “ Design Optimization of Complex Hydromechanical Transmissions,” ASME J. Mech. Des., 135(9), p. 091005. [CrossRef]
Srivastava, N. , and Haque, I. , 2009, “ A Review on Belt and Chain Continuously Variable Transmissions (CVT): Dynamics and Control,” Mech. Mach. Theory, 44(1), pp. 19–41. [CrossRef]
Katsumata, Y. , Segawa, S. , Adachi, K. , Higashimata, A. , and Ochi, Y. , 2008, “ Development of a Slip Speed Control System for a Lock-Up Clutch (Part II),” SAE Paper No. 2004-01-1227.
Liu, Z. , Lei, Y. , Zheng, H. , Fu, Y. , and Jiang, X. , 2013, “ Slip and Lock up Control of Torque Converter Clutch at Launching Conditions and Its Temperature,” SAE Paper No. 2013-01-0357.
Bottiglione, F. , and Mantriota, G. , 2013, “ Effect of the Ratio Spread of CVU in Automotive Kinetic Energy Recovery Systems,” ASME J. Mech. Des., 135(6), p. 061001. [CrossRef]
Rossetti, A. , and Macor, A. , 2013, “ Multi-Objective Optimization of Hydro-Mechanical Power Split Transmissions,” Mech. Mach. Theory, 62, pp. 112–128. [CrossRef]
Gomà Ayats, J. R. , Vivancos Calvet, J. , Minguella Canela, J. , Diego-Ayala, U. , and Fenollosa Artes, F. , 2011, “ Power Transmitted Through a Particular Branch in Mechanisms Comprising Planetary Gear Trains and Other Fixed or Variable Transmissions,” Mech. Mach. Theory, 46(11), pp. 1744–1754. [CrossRef]
Macor, A. , and Rossetti, A. , 2011, “ Optimization of Hydro-Mechanical Power Split Transmissions,” Mech. Mach. Theory, 46(12), pp. 1901–1919. [CrossRef]
Vahabzadeh, H. , and Linzell, S. M. , 1991, “ Modeling, Simulation, and Control Implementation for a Split-Torque, Geared Neutral, Infinitely Variable Transmission,” SAE Paper No. 910409.
Muta, K. , Yamazaki, M. , and Tokieda, J. , 2004, “ Development of New-Generation Hybrid System THS II—Drastic Improvement of Power Performance and Fuel Economy,” SAE Paper No. 2004-01-0064.
Snitchler, G. , Gamble, B. , King, C. , and Winn, P. , 2011, “ 10 MW Class Superconductor Wind Turbine Generators,” IEEE Trans. Appl. Supercond., 21(3), pp. 1089–1092. [CrossRef]
Mantriota, G. , 2005, “ Fuel Consumption of a Vehicle With Power Split CVT System,” Int. J. Veh. Des., 37(4), pp. 327–342. [CrossRef]
Wang, H. , Sun, D. , and Qin, D. , 2016, “ A New Continuously Variable Transmission System Applied to Transmission System of the Roadheader's Cutting Unit,” Proc. Inst. Mech. Eng. Part C (in press).
Gauthier, J.-P. , and Micheau, P. , 2010, “ A Model Based on Experimental Data for High Speed Steel Belt CVT,” Mech. Mach. Theory, 45(11), pp. 1733–1744. [CrossRef]


Grahic Jump Location
Fig. 1

Power-cycling phenomena of powertrain system

Grahic Jump Location
Fig. 2

Layout of configuration of powertrain system

Grahic Jump Location
Fig. 3

Power-cycling variable transmission design patterns

Grahic Jump Location
Fig. 4

The relationship of ηsys/ηk and iy

Grahic Jump Location
Fig. 5

Efficiency characteristic of PCVT

Grahic Jump Location
Fig. 6

First-gear transmission characteristics of PCVT

Grahic Jump Location
Fig. 7

The relationship of isys and icvt

Grahic Jump Location
Fig. 8

The efficiency characteristics of PCVT

Grahic Jump Location
Fig. 9

The engine torque map

Grahic Jump Location
Fig. 10

The engine fuel consumption map

Grahic Jump Location
Fig. 11

The ECE and EUDC driving condition

Grahic Jump Location
Fig. 12

The differences of instantaneous fuel consumption




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In