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http://dx.doi.org/10.5916/jkosme.2007.31.1.34

A Study on the Practicability of A Power Splitted Continuously Variable Transmission with Single Mode  

Seong, Sang-Hoon (부산대학교 기계기술연구소)
Park, No-Gill (부산대학교 기계공학부)
Lee, Hyoung-Woo (부산대학교 기계설계과 대학원)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.31, no.1, 2007 , pp. 34-43 More about this Journal
Abstract
As a method to improve the poor torque capacity on the continuously variable transmission(CVT), power splitted devices(PSD) reducing the power entering into the transmission has been considered. But this kind of PSD requires for the variator to be a large coverage of the speed ratio (CSR) Since the CSRs of the well-known push belt or the toroidal ones are not enough large, the power splitted CVTs (PSCVTs) using them should be made with multiple modes. inevitably adding the do9 clutches and the associated accessories. In this paper a PSCVT with single mode is conceptually designed A new continuously variable unit (CVU) consisting of the paired inner and outer spherical rotors is used. The CVU has large CSR and excellent compactness. As a PSD. a variable bridge (VB) using the Planetary gear units (PGUs) is considered because it has an upper bound on the power ratio. An optimal design to minimize the effective efficiency of the PSCVT is carried out. Through the performance analysis on the designed model, good expectation on the practicability in the heavy vehicle system is shown.
Keywords
Continuously variable transmission; Power splitted devices; Power splitted CVT; Planetary gear unit;
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