The Effect of Hydraulic Circuit Design and Control on the Efficiency of a Continuously Variable Transmission

1996 ◽  
Author(s):  
N. D. Vaughan ◽  
M. Gübeli ◽  
C. R. Burrows
Keyword(s):  
Circuit Design ◽  
Continuously Variable Transmission ◽  
Hydraulic Circuit ◽  
Variable Transmission ◽  
And Control

A Model-Based Approach to the Estimation and Control of a Continuously Variable Transmission

2020 ◽  
Vol 28 (5) ◽  
pp. 1940-1947 ◽  
Author(s):  
William Dunham ◽  
Jinwoo Seok ◽  
Anouck Girard ◽  
Ilya Kolmanovsky ◽  
Weitian Chen ◽  
...  
Keyword(s):  
Continuously Variable Transmission ◽  
Model Based ◽  
Variable Transmission ◽  
Estimation And Control ◽  
And Control

Dynamics Analysis and Control of a Holonomic Vehicle With a Continuously Variable Transmission

2000 ◽  
Vol 124 (1) ◽  
pp. 118-126 ◽  
Author(s):  
Karim A. Tahboub ◽  
Harry H. Asada
Keyword(s):  
Dynamic Characteristics ◽  
Impedance Matching ◽  
Gear Ratio ◽  
Continuously Variable Transmission ◽  
Friction Compensation ◽  
Vehicle Stability ◽  
Dynamics Analysis ◽  
Dc Motors ◽  
Variable Transmission ◽  
And Control

This paper presents kinematic and dynamic analysis of a holonomic vehicle with continuously-variable transmission. Four ball wheels, independently actuated by DC motors, enable for moving the vehicle in any direction within the plane and rotating it around its center. The angle between the two beams holding the balls can be changed to alter the gear ratio and other dynamic characteristics of the vehicle. This feature is exploited in augmenting the vehicle stability, optimizing output power, selecting an appropriate gear ratio, and in impedance matching. A simple adaptive friction-compensation-based controller is proposed to handle the complex friction properties.

scholarly journals Effects of Electric Circulation on the Energy Efficiency of the Power Split e-CVT Hybrid Systems

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2342 ◽  
Author(s):  
Cheng-Ta Chung ◽  
Chien-Hsun Wu ◽  
Yi-Hsuan Hung
Keyword(s):  
Energy Efficiency ◽  
Hybrid Systems ◽  
High Speed ◽  
Electric Energy ◽  
Continuously Variable Transmission ◽  
Operating Characteristics ◽  
Power Split ◽  
Variable Transmission ◽  
And Control ◽  
Operating Points

This paper aims at investigating the fundamental characteristics of energy efficiency for power split electronic-continuously-variable-transmission (e-CVT) hybrid systems under the operation of electric circulation, i.e., circulating part of the engine power through the generator and motor in form of electric energy to improve system efficiency as well as perform the continuously-variable-transmission (CVT) functionality. The relations of kinematics and energy conservation for each power component are constructed and analyzed to classify how the operating points of the engine in term of torque and rotational speed may vary under different degrees of electric circulation indicated by a parameter called ratio of circulating power. Thereby, power split e-CVT hybrid systems can be classified into three types: upward circulation, downward circulation, and neutral circulation. Accordingly, two power split e-CVT hybrid systems, one of input split type and the other of output split type, are selected to be analyzed regarding their operating characteristics and simulated on their performances of energy efficiency. As a result, the former is a type of downward circulation in favor of driving at low speed and high driving load, while the latter is a type of upward circulation with an advantage of driving at high speed and low driving load. Thereby, applying this analysis to investigate the effects of electric circulation on power split e-CVT systems may help the developers implement suitable energy management and control strategy in accordance with their corresponding operating characteristics of energy efficiency.

Measurement and Control of Slip in a Continuously Variable Transmission

2004 ◽  
Vol 37 (14) ◽  
pp. 43-48 ◽  
Author(s):  
B. Bonsen ◽  
T.W.G.L. Klaassen ◽  
K.G.O. van de Meerakker ◽  
M. Steinbuch ◽  
P.A. Veenhuizen
Keyword(s):  
Continuously Variable Transmission ◽  
Variable Transmission ◽  
And Control ◽  
Measurement And Control
Sign in / Sign up

Export Citation Format

Share Document