...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...

... principle for planetary variable structure transmission. Design example using three PGSs is developed based on the variable structure method. Several six-, seven-, and eight-speed PGTs are obtained for the longitudinal and transverse planetary automatic transmissions. The method is also generalized...

...Cheng-Ho Hsu; Ruei-Hong Huang The purpose of this paper is to present an efficient methodology for the design of six-speed Ravigneaux-type automatic transmissions based on the concepts of basic gear ratios and speed ratio equations. First, the speed ratio equations of an eight-link two-degree...