A study of maximum power operation for engine in continuously variable transmission powertrain

2011 ◽  
Author(s):  
Lin He ◽  
Li Liang ◽  
Yu Liangyao ◽  
Song Jian
Keyword(s):  
Continuously Variable Transmission ◽  
Maximum Power ◽  
Variable Transmission ◽  
Power Operation

scholarly journals THE ABILITY OF THE CONTINUOUSLY VARIABLE TRANSMISSION TO CONTROL THE ENGINE AT MAXIMUM POWER: LITERATURE REVIEW

SINERGI ◽  
2021 ◽  
Vol 25 (3) ◽  
pp. 343
Author(s):  
Sugeng Ariyono ◽  
Bambang Supriyo ◽  
Indra Feriadi ◽  
Dedy Ramdhani Harahab ◽  
Nurul Akmar Akmar Abu Husain
Keyword(s):  
Relevant Information ◽  
Continuously Variable Transmission ◽  
Maximum Power ◽  
Automotive Applications ◽  
Passenger Vehicle ◽  
New Developments ◽  
Current State ◽  
Variable Transmission ◽  
Solid Foundation ◽  
Further Development

Good ride performance is one of the most important key attributes of a passenger vehicle. One of the methods to achieve this is by using Continuously Variable Transmission (CVT). This is because a CVT can provide an almost infinite ratio within its limits smoothly and continuously. The flexibility of a CVT allows the driving shaft to maintain a constant angular velocity over a range of output velocities. New developments in gear reduction and manufacturing have led to ever more robust CVTs, allowing them to be applied in more diverse automotive applications. As CVT development continues, costs will be reduced further, and the performance will continue to improve, making further development and application of the CVT technology desirable. This cycle of improvement will offer CVT a solid foundation in the world's automotive infrastructure. This paper aims to provide some background and relevant information that is necessary for this study. Specifically, a brief description of CVT, advantages and their brief history is presented. This paper also evaluates the current state of CVT, investigate the technology frontline of drivetrain control and the development of CVT. The stepless transmission is able to maintain the engine running at its maximum power.

Power-Transfer Capacity of a Geared-Neutral Transmission

2007 ◽  
Author(s):  
Burak Gecim ◽  
Neil Anderson ◽  
Jeffrey Wehking
Keyword(s):  
Continuously Variable Transmission ◽  
Maximum Power ◽  
Contact Temperature ◽  
Design Parameters ◽  
Power Transfer ◽  
Power Capacity ◽  
Variable Transmission ◽  
Capacity Estimates ◽  
Ratio Range

Geared-neutral Continuously Variable Transmission (CVT) designs offer various kinematic advantages including a wide ratio range, and elimination of starting devices. However, they suffer from power re-circulation through the Continuously Variable Unit (CVU), which reduces the overall CVT efficiency and increases the CVU contact temperatures. This, in turn, limits the CVT power rating. In this study, the CVU and the CVT design parameters are optimized simultaneously to yield the highest power capacity. The CVU power capacity estimates are based on an instantaneous CVU-contact-temperature of 180°C. It is shown that a CVU design that yields the maximum power capacity is different from a design that yields the highest CVU efficiency.

Double-Cage Constant Power Continuously Variable Transmission (CP-CVT)

2006 ◽  
Author(s):  
Romeo P. Glovnea ◽  
Ovidiu S. Cretu
Keyword(s):  
Continuously Variable Transmission ◽  
Maximum Power ◽  
Transmission Ratio ◽  
Kinematics And Dynamics ◽  
Constant Power ◽  
Active Elements ◽  
Internal Geometry ◽  
Variable Transmission ◽  
Specific Geometry ◽  
New Generation

The paper focuses on the internal construction of an original Constant Power Continuously Variable Transmission (CP-CVT). In a recent publication the authors have introduced the fundamentals of the kinematics and dynamics of the CP-CVT. The present study focuses on the optimisation of the CP-CVT’s internal geometry and the size of its active elements in order to obtain maximum power transmitted with least variation over a range of transmission ratio. The paper concludes that for a specific geometry the CP-CVT presented offers promising characteristics that recommend it as a good candidate in the race of developing a new generation of the automobiles’ powertrain.

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