Understanding CVT Transmission Through Ansys Analysis

SAURADEEP DASGUPTA

AM.EN.U4MEE21068

SIDHARTH S

AM.EN.U4MEE2169

SREEHARI U

AM.EN.U4MEE21070

Exploring the Functionality and Performance of CVT Transmission

Understanding CVT Transmission Through Ansys Analysis

DESIGN AND CALCULATION

Dimension of Belt:

Dimension of pulley:

The material of the pulley is mild steel. Pulley is made in

2 Disks.

The density if mild steel is 7860 kg/m3.

Center distance between pulleys (C) = 214mm.

Driven pulley diameter (Assuming) = 195.5mm

Driving pulley diameter (d)

The Dunlop industrial belts catalog provides the belt’s

specifications. Which is mentioned below:

Length of belt = 816mm

Belt Groove angle =24˚

Mass of belt = 0.5kg/m

Main Cross Section = 33mm X 10mm

Benefits in Sports Cars

Calculation of centrifugal force:

NMax= 3800 RPM

RMax = 65mm

Centrifugal force = mrꞶ2

ꞶMax = (2×π×N)/60 = (2×π×3800)/60

= 397.93 red/sec

Considering the mass of a smaller pulley 900 gm

Considering the mass of a bigger pulley 1800 gm

Centrifugal force of smaller pulley

= (0.9×65× (397.93) ^2)/1000

= 9263.374N

Centrifugal force of bigger pulley

= (1.8×65× (397.93) ^2)/1000

=18526.74 N

Driving Pulley diameter (d) =152.5mm

Variation in diameter of a driving pulley (t)

= (138.5-46.5)

= 92mm

Variation in diameter of a driven pulley (T)

= (181.35-69.25)

= 112.1mm

Pulley Grove angle (α) =24˚

Total Displacement of driven pulley = (t/2)*tan (α/2)

= (92/2) tan (12)

= 19.5mm

Total displacement of Driven Pulley = (T/2)*tan (α/2)

= (112/2) tan (12)

= 23.79mm

Analyzing CVT Transmissions with Ansys Software

Sports car manufacturers such as Nissan have utilized CVT transmission analysis to enhance acceleration and responsiveness, achieving superior driving experiences.

Design and calculation

Enhanced Performance Metrics

Innovative Material Science

Belt Tension:

Enhancing Driver Experience

Mass of Belt (m) = 0.5 kg/m

Coefficient of friction between belt and pulley (μ) = 0.2

Power transmitted (Power output from the engine)

2*piNT/60

2*pi*3800*10/60

= 3979.35 watt

PROBLEM FORMULATION:

New performance metrics and testing methodologies are being adopted to evaluate CVT efficiency, responsiveness, and longevity.

The use of innovative materials like carbon fiber and composites is revolutionizing the design and durability of CVT components.

The seamless shifting and responsive performance of CVT transmissions contribute to a comfortable and enjoyable driving experience, reducing driver fatigue and enhancing control on various road conditions.

Ansys software offers advanced tools for in-depth analysis of CVT transmissions, providing crucial insights for optimization and performance enhancement.

Research on CVT V-belt examination uses

experiments and finite element analysis (FEA) to determine the failure initiation point. FEA results show that as tooth load increases, stress initiation shifts from the working

flank’s opposite side to the working flank side.

Overview of Ansys Software

Real-world Examples of CVT Transmission Analysis

Integration of Electric Technologies

Innovations in CVT Technology

Definition and Functionality

Importance in Automotive Industry

Environmental Impact and Sustainability

Enhanced Control Systems

Future Trends in CVT Technology

Continuous innovations in CVT technology aim to address challenges related to efficiency, reliability, and performance, driving advancements in automotive engineering and shaping the future of transmission systems in vehicles.

The integration of electric components in CVT systems is a key trend, leading to hybrid and electric vehicle applications.

Ansys is a powerful engineering simulation software used for structural, thermal, and fluid analysis, enabling detailed examination of CVT components and their interactions.

CVT transmission is a type of transmission that can change seamlessly through an infinite number of effective gear ratios, allowing for optimal performance and fuel efficiency in vehicles.

The widespread adoption of CVT transmissions by leading automotive manufacturers underscores their significance in achieving higher efficiency standards, meeting regulatory requirements, and enhancing vehicle performance and comfort levels.

The fuel efficiency and reduced emissions of vehicles equipped with CVT transmissions align with sustainability goals, promoting eco-friendly driving practices and minimizing the carbon footprint of modern transportation.

Advanced control systems using AI and machine learning are being developed to optimize CVT performance and adapt to varying driving conditions.

Exploring the latest advancements and emerging trends in CVT technology that are shaping the automotive industry.

Case study on Why CVT transmissions lived up to its expectations

Understanding CVT Transmission

Exploring successful real-world applications of CVT transmission analysis in automotive engineering.

Optimizing Vehicle Performance

Engineers of Williams team perfectly understood that since an engine is permanently revving up and down, it is rarely operating at its full power. For an engine to work at its full potential, it is required to keep its speed at the peak of its power – a task that can be successfully accomplished by a CVT solution. The main issue for integration of such technology in racing cars was the matter of finding a robust enough belt to transmit the 850 hp from an F1 engine. Eventually, the Williams' engineers came up with the reliable hardware for its CVT prototype.

but subsequently the FIA introduced a rule stating that from 1994 F1 transmission units must have "a minimum of 2 and a maximum of 7 separate gear ratios".Also, CVTs have higher drivetrain losses than a torque converter or dual clutch and the engineers couldnt find a belt that would last more than 17 laps, all the belts would just away and they couldnt use it

Automotive Industry Applications

CVT transmissions play a crucial role in optimizing vehicle performance by providing efficient power delivery, smooth acceleration, and adaptable gear ratios to match driving conditions, ensuring an enhanced driving experience for users.

Advancements in CVT Technology

Benefits of Ansys Analysis in Optimizing CVT Performance

Application in Analyzing CVT Transmissions

ance.The Continuous Variable Transmission (CVT)

system offers a solution that permits stepless gear ratio

shifting regardless of the required speed and torque. Since its

introduction a century ago, CVT technology has grown in

popularity among luxury vehicles. However, CVTs are not

widely used in machinery because of some limitations in the

existing design. This study evaluates the CVT's design to

identify its weakest point. Increasing the CVT's design

efficiency to extend its operational life. The current design has

several issues that should be minimized, including noisy

operation, jerking while accelerating, and lack of awareness of

speed changes, expensive production, low belt life, and belt

sliding after a certain number of cycles. For that, a Solid Works

CVT model has been made, and Ansys will be used for analysis.

The CVT V-Belt, which is built of composite material, is the

subject of this study. As one of the transmission's major

components, the performance of the belt under extreme

conditions may provide insight into its long-term durability

and performance. This study was conducted in five steps:

review of the existing design, analysis of the existing design,

design optimization, analysis of the revised design, and result

comparison. The belt's material was changed to achieve an

optimized design.

Recent developments in CVT technology have focused on enhancing efficiency, durability, and overall performance.

CVT transmission analysis has been instrumental in improving fuel efficiency and performance in vehicles from leading automotive manufacturers like Toyota and Honda.

By leveraging Ansys analysis, engineers can fine-tune CVT parameters, reduce energy losses, enhance responsiveness, and improve overall efficiency, resulting in superior performance and reliability.

Ansys allows for virtual testing of CVT designs, predicting performance, durability, and efficiency under various operating conditions, leading to informed design decisions and optimizations.