geometric optimization of half toroidal continuously variable transmission using intelligent techniques

Authors

مجتبی دلخوش

محمود سعادت فومنی

abstract

the objective of this research is geometrical optimization of half toroidal continuously variable transmission (cvt) in order to achieve high power transmission efficiency and low weight. after dynamic analysis of the system, the contact between the disk and the roller is modeled according to elasto-hydrodynamic lubrication principles. accordingly, a computer model is created with geometric, thermal and kinetic parameters as inputs of the system, to determine the efficiency and the weight of cvt. results are compared to those obtained from models in other articles to confirm its validity. geometric parameters are obtained by means of genetic optimization algorithm, while optimization parameters are power transmission efficiency and system weight. it is observed that regardless of weight coefficients assigned to power transmission efficiency and weight, difference between results are negligible. also, the effect of oil film temperature, speed ratio and rotational speed of input disk on power transmission efficiency for optimized geometry is shown.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Application of Multi-objective Optimization for Optimization of Half-toroidal Continuously Variable Transmission

Among different goals defined in vehicle design process, fuel consumption (FC) is one of the most important objectives, which significantly has taken into account lately, both by the customers and vehicle manufacturers. One of the significant parameters which impacts the vehicle FC is the efficiency of vehicle's power train. In this paper, a half-toroidal continuously variable transmission (CVT...

full text

Modelling and Optimization of Toroidal Continuously Variable Transmission in ECE Driving Cycle

In the present study, the aim is to optimize full and half toroidal continuously variable transmission (CVT) in order to minimize the vehicle fuel consumption (FC) in ECE driving cycle. First, the model of both CVTs’ efficiency is presented. The control strategy of CVTs speed ratio based on minimizing the vehicle FC is introduced, and the algorithm of calculating the vehicle FC is shown. Afterw...

full text

an experimental study on full toroidal continuously variable transmission system

abstract: a continuously variable transmission (cvt) is a transmission which may change step less by way of an infinite variety of effective gear ratios between maximum and minimum values. this contrasts with different mechanical transmissions that solely permit just a few different distinct gear ratios to be selected. continuously variable transmissions (cvts) are mechanical devices that allow...

full text

Multi-objective Optimization of Hybrid Electric Vehicle Equipped with Power-split Continuously Variable Transmission

This paper aims to find the efficient state of hybrid electric vehicle (HEV) by simultaneous optimization of the control strategy and the power train. The power transmission employed in this vehicle is a power-split continuously variable transmission (CVT) which uses several fixed ratio mechanisms. After describing this transmission, the rules of electric assist control strategy are introduced....

full text

Design of Continuously Variable Transmission (CVT) with Metal Pushing Belt and Variable Pulleys

Nowadays, automakers have invested in new technologies in order to improve the efficiency of their products. Giant automakers have taken an important step toward achieving this objective by designing continuously variable transmission systems (CVT) to continuously adapt the power of the engine with the external load according to the optimum efficiency curve of e...

full text

My Resources

Save resource for easier access later


Journal title:
علوم کاربردی و محاسباتی در مکانیک

جلد ۲۳، شماره ۱، صفحات ۱۲-۰

Keywords

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023