This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Basic Conceptual Designs for Rectifiers of Inertial Transmissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 01, 2014 by SAE International in United States
Annotation ability available
All inertial continuous/infinite variable transmissions (CVT-IVT) need of a rectifier. This is due to the fact that this type of CVT-IVTs should transform, in some way, the ratcheting motion into a unique direction of rotation in order to be transmitted to the kinematic chain of the vehicle transmission system. The choice of the rectifying system and the characteristics of the components heavily depend on the motion to be rectified and on the oscillating mechanism generator.
The current rectifier systems included in inertial CVT-IVTs use freewheels to transform the oscillating movement. The use of freewheels has serious limitations for tourism and industrial vehicle applications, regarding the upper bounds of conforming to two working situations: i) high torque at low speed, and ii) high speed at a relatively low torque.
The operation of this type of rectifier involves periods in which the outer track and inner track of the freewheels rotate in opposite directions, with the result that the relative velocity between tracks is twice the speed of the output shaft of the rectifier. This makes it difficult to find freewheels on the market that can withstand the rotational speeds to allow their application in the transmission system of a vehicle.
Several rectifying system designs are proposed and, finally, analytical and numerical studies are tackled to identify the most applicable designs.
|Technical Paper||Kinematic Analysis of Chordal Action and Transmission Errors of Silent Chains|
|Journal Article||Acceleration Testing and Modeling of Vehicle Kinematics Under Idle Conditions|
|Journal Article||Automotive Speech Intelligibility Measurements|
CitationMorales, F. and Benitez, F., "Basic Conceptual Designs for Rectifiers of Inertial Transmissions," SAE Technical Paper 2014-01-1737, 2014, https://doi.org/10.4271/2014-01-1737.
- Norton, R. L.; Williams, “DESIGN OF MACHINERY. An introduction to the synthesis and analysis of mechanisms and machines,” McGraw-Hill, ISBN 0-07-048395-7, 46-49, 1990.
- Friedmann O; Haas W; Mair, U., “The Crank-CVT,” 7th LuK Symposium, 2002.
- Williams, E. A.; Williams, J. W., “Power Transmission Utilizing Conversion of Inertial Forces,” US Patent 5,860,321, 1999.
- Lester, W. T., “Continuously Variable Transmission Utilizing Torque and One Way Drives,” US Patent 6,044,718, 2000.
- Constantinesco, G., “An improved method and means for transmitting power from prime movers such as internal combustion engines to driven shafts, particularly for locomotives or other vehicles driven by internal combustion engines,” GB Patent 185,022, 1922.
- Calland, F., “Torque Converter,” US Patent 3,581,584, 1971.
- Centeno, G.; Morales, F.; Perez, F. B; Benitez, F.G., “Continuous Variable Transmission with an Inertia-Regulating System,” Journal of Mechanical Design, 132, pp. 051004/1-051004/13, 2010.
- Morales, F., “Conceptual design of rectifying systems for dynamic CVTs” (In Spanish). Ph.D. Thesis Dissertation, Univ. of Seville, Spain, 2011.
- Müller, H. W. “Epicyclic Drive Trains: Analysis, Synthesis, and Applications” Wayne State University Press, Detroit Michigan, ISBN 0-8143-1663-8, 44-47, 1982.
- Benitez, F. G.; Perez, F. B.; Centeno, G.; Morales, F. J. “Continuously Variable Transmission System”, PCT PCT/ES2009/000175 (WO 2010/070158), European Patent EP 2 360 396 B1, 2013.