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New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage. Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun Ku Professor: Nogill Park. Layout. - Basic components. Driving / driven rotor Traction ball assembly Pressure device

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new traction drive pairing with inner spherical rotor for automobile usage

New Traction Drive Pairing withInner Spherical Rotor for Automobile Usage

Depart of Mechanical Design, Pusan National Univ.

South Korea.

Researcher: Ilkeun Ku

Professor: Nogill Park

layout
Layout

- Basic components

  • Driving / driven rotor
  • Traction ball assembly
  • Pressure device
  • Ratio changer
operation principle
Operation principle

- ISCVT assemnly

operation principle1
Operation principle

- Pressure device

operation principle2
Operation principle

- Traction ball assembly components

1. One pair of countor rotor

2. Two bearings

3. Countor rotor shaft

4. Countor rotor housing

5. Connector between CRA and RC

operation principle3
Operation principle

- Ratio changer and speed ratio

numerical investigation
Numerical investigation

- Design specification for the passenger car

numerical investigation1
Numerical investigation

- Flow chart

Simulation start

Input design parameter

  • Kinematic analysis
  • Calculate traction ball angle range
  • Kinetic analysis
  • Direction vector declaration
  • Torque equilibrium Equations
  • Hertzian contact theory
  • Life time
  • Transmission efficiency

Simulation results

End program

numerical investigation2
Numerical investigation

- Simulation results

stress analysis
Stress analysis
  • Driving rotor, traction ball,
  • Frame and bearing housing
performance analysis
Performance analysis

Transmission efficiency (%)

performance analysis1
Performance analysis

Maximum shear stress (MPa)

Driven rotor

Driving rotor

performance analysis2
Performance analysis

Life time (Hour)

Driven rotor

Driving rotor

performance analysis3
Performance analysis

Ratio changer work (Joul)

performance analysis4
Performance analysis

Gradeability (Degree)

capacity expantion
Capacity expantion

Transmission efficiency (%)

capacity expansion
Capacity expansion

Maximum shear stress (MPa)

capacity expansion1
Capacity expansion

Life time (Hour)

comparison with toroidal cvt
Comparison with toroidal CVT

Performance analysis

comparison with toroidal cvt1
Comparison with toroidal CVT

Performance analysis

conclusion
Conclusion
  • Introduce a new traction drive ISCVT.
  • Perform kinematic / kinetic analysis and derive the speed ratio.
  • Numerical investigation and conceptual design on the basis of
  • simulation results.
  • ▪ CAD and stress analysis
  • Apply to the 110 kW automobile and evaluate its performances.
  • ▪ Transimssion efficiency,
  • ▪ Maximum shear stress
  • ▪ Life time
  • ▪ Gradeability
  • ▪ Ratio changer work
  • Comparison with toroidal CVT and the results show the better
  • performances.