Continuously Variable Transmission Test Code For Passenger Cars

2011 ◽  
Author(s):  
Keyword(s):  
Continuously Variable Transmission ◽  
Passenger Cars ◽  
Variable Transmission ◽  
Transmission Test

scholarly journals Intelligent Multiobjective Slip and Speed Ratio Control of a Novel Dual-Belt Continuously Variable Transmission for Automobiles

2014 ◽  
Vol 2014 ◽  
pp. 1-17
Author(s):  
Zhengchao Xie ◽  
Pak Kin Wong ◽  
Yueqiao Chen ◽  
Ka In Wong
Keyword(s):  
Analytical Model ◽  
Fuzzy Controller ◽  
Transmission Efficiency ◽  
Continuously Variable Transmission ◽  
Speed Ratio ◽  
Rule Base ◽  
Passenger Cars ◽  
Variable Transmission ◽  
Torque Capacity ◽  
Low Torque

Van Doorne’s continuously variable transmission (CVT) is the most popular CVT design for automotive transmission, but it is only applicable to low-power passenger cars because of its low torque capacity. To overcome this limitation of traditional single-belt CVT, a novel dual-belt Van Doorne’s CVT (DBVCVT) system, which is applicable to heavy-duty vehicles, has been previously proposed by the authors. This paper, based on the published analytical model and test rig of DBVCVT, further proposes an intelligent multiobjective fuzzy controller for slip and speed ratio control of DBVCVT. The controller aims to safely control the clamping forces of both the primary and the secondary pulleys in order to improve the transmission efficiency, achieve the accurate speed ratio, and avoid the belt slip under different engine loads and vehicle speeds. The slip, speed ratio, and transmission efficiency dynamics of DBVCVT are firstly analyzed and modeled in this paper. With the aid of a flexible objective function, the analytical model, and fuzzy logic, a Pareto rule base for fuzzy controller is developed for multiobjective DBVCVT control. Experimental results show that the proposed controller for slip and speed ratio regulation of DBVCVT is effective and performs well under different user-defined weights.

scholarly journals Continuously Variable Transmissions - outline

2018 ◽  
Vol 19 (6) ◽  
pp. 447-451
Author(s):  
Jarosław Goszczak ◽  
Bartosz Radzymiński
Keyword(s):  
Work Conditions ◽  
Continuously Variable Transmission ◽  
Manual Transmission ◽  
Production Data ◽  
Passenger Cars ◽  
The World ◽  
Continuously Variable Transmissions ◽  
Variable Transmission ◽  
Ratio Change ◽  
Different Parts

Paper concerned the Continuously Variable Transmission (CVT). The comparison of the engine’s work conditions with conventional manual transmission and CVT’s is presented. Also, a short historical track is included. Furthermore, a production data with the forecast is presented for different parts of the World. Various current solutions of continuous ratio change are mentioned with the more detailed description of the most popular design used in passenger cars. Technological challenges and possibilities of further transmission improvement are included.

Launching Performance Analysis of a Continuously Variable Transmission Vehicle With Different Torsional Couplings

2005 ◽  
Vol 127 (2) ◽  
pp. 295-301 ◽  
Author(s):  
Jungyun Kim
Keyword(s):  
Performance Analysis ◽  
Mathematical Models ◽  
Continuously Variable Transmission ◽  
Simulation Program ◽  
Road Test ◽  
Passenger Cars ◽  
Transient Characteristics ◽  
The Road ◽  
Torsional Coupling ◽  
Variable Transmission

This article describes the launching behaviors of passenger cars equipped with continuously variable transmission (CVT), which have different torsional couplings: a torsion damper and a dual mass flywheel. To reduce the driveline vibration and noise, a torsional coupling is installed in the CVT vehicle, in which the wet type multiplate clutch is used as a start device. In addition, a torsional coupling makes considerable effects on the launching performance of a vehicle. The launching performances, considered here, are the acceleration performance with various throttle positions and the transient characteristics of vehicle creep and throttle tip-in. By using the mathematical models of each driveline component, we developed a simulation program to investigate the launching performance in various launching conditions. In order to verify our simulation program, we performed the road test of a prototype vehicle that has torsion damper as a torsional coupling. Finally, we analyzed and compared the launching performances in two cases of a torsion damper and a dual mass flywheel using the developed simulation program.

Development of a Novel Dual-Belt Van Doorne's Continuously Variable Transmission for Automobiles — A Preliminary Study

2018 ◽  
Vol 18 (02) ◽  
pp. 1850016 ◽  
Author(s):  
Pak Kin Wong ◽  
Zhengchao Xie ◽  
Yueqiao Chen ◽  
Lap Mou Tam
Keyword(s):  
Analytical Model ◽  
Power Efficiency ◽  
Continuously Variable Transmission ◽  
Heavy Duty ◽  
Passenger Cars ◽  
Variable Transmission ◽  
Torque Capacity ◽  
Preliminary Study ◽  
Simulation Results ◽  
Low Torque

The continuously variable transmission (CVT) is one of the prevailing automotive transmissions. Nowadays, the most popular design is Van Doorne's CVT with single metal pushing V-belt. However, it is only applicable to low-power passenger cars because of its low torque capacity. To overcome this limitation of traditional single-belt Van Doorne's CVT, this research proposes a novel parallel Van Doorne's dual-belt CVT system which can be applied to heavy-duty vehicles. As the first attempt, an analytical model for both torque capacity and power efficiency based on effective radii instead of traditional working radii for the single-belt CVT is developed for this novel CVT system, and this newly developed model is experimentally validated. Evaluation result reveals that the new analytical model based on effective radii is more accurate than that based on working radii. Experimental and simulation results show that the proposed dual-belt CVT system can greatly improve the torque capacity as compared with the single-belt CVT. Moreover, the newly proposed analytical model can provide a foundation for further study of multi-belt CVTs.

scholarly journals Continuously variable transmission leakage test results

2019 ◽  
pp. 5-13
Author(s):  
Jarosław Goszczak ◽  
Bartosz Radzymiński ◽  
Grzegorz Mitukiewicz
Keyword(s):  
Centrifugal Force ◽  
Rotational Speed ◽  
Continuously Variable Transmission ◽  
Test Results ◽  
Passenger Cars ◽  
Short Introduction ◽  
General Outline ◽  
Oil Leakage ◽  
Leakage Test ◽  
Variable Transmission

After a short introduction characterizing the general outline of the issue, this paper describes the test results of oil leakage measurements through CVT actuator seals. The research was done using Jatco company's CVT 7 model, the popular gearbox for small passenger cars. Several curves of leakage values are given for both actuators, concerning different conditions such as rotational speed, oil temperature or pressure. In the summary several conclusions are formulated, based on presented test results. The determined maximal value of leakage is about 1 l/min. It emerged that the influence of centrifugal force is negligible. What is more, the observed phenomena are shortly described and projected for more detailed investigation.

Sign in / Sign up

Export Citation Format

Share Document