scholarly journals Characteristic Analysis and Co-Validation of Hydro-Mechanical Continuously Variable Transmission Based on the Wheel Loader

2020 ◽  
Vol 10 (17) ◽  
pp. 5900 ◽  
Author(s):  
Lirong Wan ◽  
Hanzheng Dai ◽  
Qingliang Zeng ◽  
Zhiyuan Sun ◽  
Mingqian Tian
Keyword(s):  
Working Conditions ◽  
General Characteristic ◽  
Continuously Variable Transmission ◽  
Vital Role ◽  
Working Environment ◽  
Characteristic Analysis ◽  
Wheel Loader ◽  
Variable Transmission ◽  
And Performance ◽  
Design Cost

Energy-saving and emission reduction has become the theme of the world. The wheel loader has a harsh working environment, complicated working conditions, and drastic changes in load, and the performance of the engine cannot be fully utilized. Therefore, the variable speed transmission of vehicles plays a vital role in improving the efficiency and performance of the vehicle. This paper establishes the general characteristic equations for the input coupling type of hydro-mechanical continuously variable transmission (HMCVT) based on the wheel loader and determines reasonable structural forms for connection of working conditions. It establishes the general efficiency equation for the reasonable structural form for efficiency analysis and presents a method of co-validation of the simulation and test for making the results of efficiency more accurate. Through this method, the transmission performance is more accurately analyzed, which provides an important guiding role and validation for the early design of HMCVT. Eventually, it gets reasonably optimized products and reduces the design cost and cycle.

scholarly journals Power Flows and Efficiency of Output Compound e-CVT

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Francesco Bottiglione ◽  
Giacomo Mantriota
Keyword(s):  
Steady State ◽  
Optimal Design ◽  
Working Conditions ◽  
Hybrid Vehicles ◽  
Short Term ◽  
Vehicle Efficiency ◽  
Variable Transmission ◽  
And Performance ◽  
And Control ◽  
Vehicular Technology

Hybridization is the most promising vehicular technology to get significant improvements of the vehicle efficiency and performance in the short-term. Mechanical transmissions for hybrid vehicles are very often multiple modes transmission, which permit improving the performance in different working conditions. In this context, optimal design and control of these transmissions are a key point to improve the performance of the vehicles, and mathematical models which supports the design can play an important role in this field. In this work, an approach for evaluating the performance of Output Compound Split e-CVT (electric Continuously Variable Transmission) in steady-state is proposed. This approach, in addition to a kinematic analysis of the device, leads to the calculation of the internal power circulation modes and the efficiency of the device in different working conditions.

Lubricating Characteristic Analysis on Automobile Continuously Variable Transmission

2014 ◽  
Vol 529 ◽  
pp. 321-325
Author(s):  
Mao Sheng Li ◽  
Qun Gui Du
Keyword(s):  
Quantitative Evaluation ◽  
Working Condition ◽  
Continuously Variable Transmission ◽  
Evaluation Index ◽  
Lubrication System ◽  
Characteristic Analysis ◽  
Simulation Process ◽  
Differential Mechanism ◽  
Variable Transmission ◽  
Reverse Gear

In order to conduct lubricating characteristic analysis on automobile continuously variable transmission, this paper divides overall model of transmission on the basis of the idea of blocking simulation. Then it generates shed oil model of differential mechanism and oil gathering model of oil groove. Set monitoring surface at the position of reverse gear shaft catcher groove in shed oil model of differential mechanism and oil groove in oil gathering model of oil groove to monitor its conditions of oil-taking. Consider the received flow from the two monitoring surfaces in simulation process as evaluation index of effects of transmission lubrication system, as well as conduct quantitative evaluation on lubricating effects of transmission lubrication system. The results show that all of working condition with second gear 1500rpm, reverse gear shaft and oil groove have comparative ideal lubrication effects on input axis.

scholarly journals PARALLEL DISK CONTINUOUSLY VARIABLE TRANSMISSION (PDCVT):PROTOTYPE DEVELOPMENT AND PERFORMANCE TESTING

2014 ◽  
pp. 213-218
Author(s):  
PRASAD VINAYAK MARULKAR ◽  
S.G. JOSHI
Keyword(s):  
Weight Ratio ◽  
Performance Testing ◽  
Continuously Variable Transmission ◽  
Speed Ratio ◽  
Rotating Disks ◽  
Parallel Disk ◽  
Prototype Development ◽  
Variable Transmission ◽  
The Coefficient Of Friction ◽  
And Performance

In this paper, a typical Parallel Disk Continuously Variable Transmission System (PDCVT) is developed in the spirit and approach of Kazerounian and Furu-Szekely. In situations where a speed ratio is required to be changed frequently, continuously variable transmission is one of the desirable solutions. The PDCVT system is one such solution which offers the advantages such as high power to weight ratio and reliability in operation. First of all, the development and manufacturing details of the developed PDCVT system are discussed and experimental and theoretical values of transmission ratios have been determined with different ball diameters and materials. Also, the theoretical and experimental evaluation of transmission torque has been carried out. Experiments have been carried out to determine the system parameters: the stiffness of the spring for preloading mechanism of the system and the area of contact between the balls and rotating disks to determine the coefficient of friction.

scholarly journals Design and Performance Study of Continuously Variable Transmission (CVT)

2017 ◽  
Vol V6 (04) ◽  
Author(s):  
Prakash Chandra Shukla ◽  
Prashant Kumar Tiwari ◽  
Yashwant Kumar Singh ◽  
Vikas Singh ◽  
Keyword(s):  
Continuously Variable Transmission ◽  
Performance Study ◽  
Variable Transmission ◽  
And Performance

Misalignment equation for the Van Doorne metal pushing V-belt continuously variable transmission

1997 ◽  
Vol 211 (2) ◽  
pp. 121-128 ◽  
Author(s):  
A. J. Robertson ◽  
K. B. Tawi
Keyword(s):  
Computer Aided Design ◽  
Continuously Variable Transmission ◽  
Improve Efficiency ◽  
Initial Effort ◽  
Computer Aided ◽  
Variable Transmission ◽  
And Performance ◽  
Aided Design

The existence of belt/pulley misalignment in the Van Doorne metal pushing V-belt continuously variable transmission (CVT) has always been recognized by researchers and the manufacturers themselves. However, its effect has always been assumed to be negligible and search through the literature reveals no work published so far to verify this assumption. Misalignment of the belt may increase losses and the need to improve efficiency is now of paramount importance. This paper is an initial effort by the authors to address this area and study the geometrical behaviour of the belt misalignment theoretically. An equation to represent this geometrical behaviour has been developed and it is able to calculate the magnitude and position of the belt misalignment at different speed ratios and at different assembled zero belt misalignment speed ratios. The condition necessary to minimize the magnitude of the belt misalignment has been determined. Verification of the equation was obtained by using a solid modeller from a Unigraphics Version 10.4.0 computer aided design (CAD) package. It is intended that the findings from this study will enable the authors to study further the effect of misalignment on the efficiency and performance of the transmission.

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