Power transmission dynamics in micro and macro slip regions for a metal v-belt continuously variable transmission under external vibrations

Ji, Junliang; Jang, Mijeong; Kwon, Oheun; Chai, Minjae; Kim, H. S.

doi:10.1007/s12239-014-0116-5

Cited by 9 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SimulationX is software provides a modeling platform and libraries with customizable elements and tools which can be used for system development and analysis, and it is one of the most popular software in the field of multi-physics modeling and simulation. In automotive technology, for examples, transmission elements (e.g., clutches [19][20][21], continuously variable transmissions [22,23]), hydraulic systems [24][25][26][27], powertrain drivelines [28][29][30], and hybrid transmissions [31][32][33] etc. have been surveyed and modeled based on SimulationX.…”

Section: Simulation Resultsmentioning

confidence: 99%

Design and Analysis of a New Torque Vectoring System with a Ravigneaux Gearset for Vehicle Applications

Chen

Chang

et al. 2017

Energies

View full text Add to dashboard Cite

Abstract:The purpose of this research is to develop a new torque vectoring differential (TVD) for vehicle applications and investigate its effect on vehicle dynamic control. TVD is a technology that is able to distribute the engine torque to the left and right driving wheels at different ratios so that the yaw motion control can be realized. Attention has been paid to this technology in recent years because of its potential to improve the vehicle performance and driving safety. In this study, a new TVD design with a Ravigneaux gearset was developed. This new design is able to use only one pair of gearsets to generate two different speed ratios, and the weight and volume of the system can be reduced. To execute the research, current TVD designs were analyzed and their design principles were clarified. Next, a new TVD design with Ravigneaux gearset was proposed. Then the connecting manner and the gear ratio of the Ravigneaux gearset were discussed. The dynamic equation of the system was then derived and the operation of the system was simulated in a MATLAB program. Further simulation was performed with a vehicle dynamic model in SimulationX to demonstrate the effect of the new system. The results of this study show the potential of building a new TVD with a Ravigneaux gearset and can be helpful for further system development.

show abstract

Section: Simulation Resultsmentioning

confidence: 99%

Design and Analysis of a New Torque Vectoring System with a Ravigneaux Gearset for Vehicle Applications

Chen

Chang

et al. 2017

Energies

View full text Add to dashboard Cite

show abstract

“…18 Ji et al studied the dynamics of power transmission of metal V-belt CVT in the micro and macro slip regions under external vibration conditions. 19 Based on CVT power transmission dynamics, a transmission simulator is developed to analyze the influence of slip on external vibration transmission characteristics in time and frequency domain. Wurm et al developed a numerical model that can predict the thermal conditions related to the CVT and obtained the error sources mainly from the temperature of the pulley surface, the heat input of the belt, and asymmetric flow conditions.…”

Section: Introductionmentioning

confidence: 99%

Design, analysis, and experiment of an innovative embedded compact continuously variable transmission with flexible metal V-belt

Liu,

Chen,

et al. 2023

International Journal of Advanced Robotic Systems

View full text Add to dashboard Cite

The existing deceleration systems in industrial robots often employ rotate vector (RV) or harmonic reducers to augment torque and decrease speed, yet achieving the motor’s peak power proves challenging. Given the extremely high space-size demands for reduction systems in robotic applications, an innovative compact continuously variable transmission is suggested, leveraging the transmission characteristics of spatial gear trains and metallic V-belts. The proposed system utilizes the input of an eccentric shaft to drive the planetary pulley’s rotation around the sun pulley. The pinhole, in cooperation with the eccentric shaft of the planetary pulley, achieves coaxial output of the transmission power. The article primarily explores the transmission and speed change mechanisms, then dissects the relationships between the transmission ratio and the effective radius of the pulley, the axial adjustment distance, and the factors influencing the pulley’s wrapping angle. Further, we use the Lagrange equation to derive the input equation, establishing the correlation between the planetary pulley’s rotation angle and system inertia, angular acceleration, angular velocity, and effective working radius over time. Finally, we simulate the continuously variable transmission’s motion to examine speed changes in forward, reverse, and neutral states. A continuously variable transmission prototype and a testing platform are also constructed to assess performance parameters, specifically input and output torque, and rotational speed.

show abstract

“…Ji et al studied the power transfer characteristics under different slip regions under external vibration conditions. The results indicate that there are differences in the external vibration transfer characteristics between the micro-slip region and the macro-slip region [ 37 ]. The mentioned documents mostly study CVT slip characteristics separately from experiments or combine CVT slip control with traditional vehicles, and few studies combine EVs with CVT slip control for efficiency optimization research.…”

Section: Introductionmentioning

confidence: 99%

Research on Clamping Force Control of CVT for Electric Vehicles Based on Slip Characteristics

Zhu

Liu

et al. 2022

Sensors

View full text Add to dashboard Cite

The low mechanical efficiency of metal belt’s continuously variable transmission (CVT) limits its application in new energy vehicles. To further improve CVT efficiency and reduce the energy consumption of electric vehicles (EVs) with CVT, this paper proposes a pure electric CVT configuration and a clamping force control strategy. The slip characteristics of CVT are obtained through a bench test, the dynamic model of CVT slip is established, and a clamping force fuzzy control strategy is designed. The strategy is studied by simulation under extreme conditions and standard driving cycles. The simulation results show that the proposed clamping force control strategy has good adaptability. Under extreme conditions, this strategy can ensure that CVT does not undergo macro slip, while reducing the clamping force by 12.86–21.65%. Energy consumption per 100 km is 14.90 kWh in NEDC, which is 6.67% lower compared with the traditional strategy. CVT average efficiency and average transmission efficiency increased by 3.71% and 6.40%. The research results demonstrate that adjusting the CVT clamping force through fuzzy control based on the slip rate can improve the CVT efficiency and energy economy of EVs, which provides a certain reference for CVT clamping force control strategy development and the application of CVT on EVs.

show abstract

Power transmission dynamics in micro and macro slip regions for a metal v-belt continuously variable transmission under external vibrations

Cited by 9 publications

References 3 publications

Design and Analysis of a New Torque Vectoring System with a Ravigneaux Gearset for Vehicle Applications

Design and Analysis of a New Torque Vectoring System with a Ravigneaux Gearset for Vehicle Applications

Design, analysis, and experiment of an innovative embedded compact continuously variable transmission with flexible metal V-belt

Research on Clamping Force Control of CVT for Electric Vehicles Based on Slip Characteristics

Contact Info

Product

Resources

About