...Hong Chen; Xiaoan Chen In the planetary automatic transmission design, efficiency is one of the primary performance indicators determining the final selection from multiple candidates. However, efficiency evaluation is the last step of conceptual design, thereby causing the trial result is often...

...Federico Tessari; Renato Galluzzi; Nicola Amati Gerotor machines are internal gear hydraulic devices that present numerous performance benefits with respect to other topologies. For this reason, they find their application in high-efficiency mechatronic devices, such as electro-hydrostatic...

...Kieran Davies; Chao Chen; Bernard K. Chen Epicyclic gear trains (EGTs) are important mechanical transmissions with many applications. For optimal design and operation of these gear trains, it is necessary to obtain complete efficiency maps of such transmissions. The efficiency of a two degrees...

...F. Bottiglione; G. Mantriota Recent applications of continuously variable transmissions with large ratio spread, such as mechanical Kinetic Energy Recovery Systems or recent hybrid architectures, need the transmission to be perfectly reversible. This short paper deals with the mechanical efficiency...

...S. Schembri Volpe; G. Carbone; M. Napolitano; E. Sedoni The authors present an optimization procedure in designing infinitely variable transmission architectures, which allows them to achieve a significant reduction in power recirculation and, hence, an increase in mechanical efficiency. The focus...

... on Trachman’s approximate equations ( 8 ) and showed a strong influence of load on both the coefficient of friction and the efficiency. More global analyses including other sources of dissipation were undertaken by Anderson and Loewenthal ( 9 10 ) who stressed the fact that no-load losses associated...