Advanced approach for layshaft gear set synthesis Online publication date: Mon, 12-Nov-2018
by Johannes Ruschhaupt; Gereon Hellenbroich
International Journal of Vehicle Design (IJVD), Vol. 76, No. 1/2/3/4, 2018
Abstract: A new systematic synthesis approach for layshaft gear sets is presented in this paper. Common synthesis methods generate, on part level, the complete solution space of all possible gear sets, from which the optimum solution is selected by various evaluation criteria. In the presented new approach, the complete solution space of Abstract: "gear set structures" is initially generated. The gear set structure is a simplified representation of the degrees of freedom (DOF) and connections of a certain gear set, based on which a fast and systematic analysis of significant gear set characteristics is possible. In the following step the gear set layout, which represents the arrangement of gear-wheels and shift elements, is developed based on the optimised gear set structure. Based on exemplary requirements, a detailed gear set for a dual clutch transmission has been developed to validate and demonstrate the process. The dual clutch transmission with two main axes, four synchroniser units and seven gear tracks offers nine forward speeds and one reverse speed.
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