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.

References

References
1.
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
.
2.
Pettersson
,
K.
, and
Krus
,
P.
,
2013
, “
Design Optimization of Complex Hydromechanical Transmissions
,”
ASME J. Mech. Des.
,
135
(
9
), p.
091005
.
3.
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
.
4.
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.
5.
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.
6.
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
.
7.
Rossetti
,
A.
, and
Macor
,
A.
,
2013
, “
Multi-Objective Optimization of Hydro-Mechanical Power Split Transmissions
,”
Mech. Mach. Theory
,
62
, pp.
112
128
.
8.
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
.
9.
Macor
,
A.
, and
Rossetti
,
A.
,
2011
, “
Optimization of Hydro-Mechanical Power Split Transmissions
,”
Mech. Mach. Theory
,
46
(
12
), pp.
1901
1919
.
10.
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.
11.
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.
12.
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
.
13.
Mantriota
,
G.
,
2005
, “
Fuel Consumption of a Vehicle With Power Split CVT System
,”
Int. J. Veh. Des.
,
37
(
4
), pp.
327
342
.
14.
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).
15.
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
.
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