Design of Low-Noise Manual Automotive Transmissions

Abstract

To find an answer to the question ‘how to design low-noise manual automotive transmissions’, it is essential to look at numerous external and internal measures which have already been developed to reduce rattle and clatter proneness. Only very few have been used in mass production. The use of these measures depends not only on the degree of noise reduction achieved but also on the production engineering and economic parameters. The wear characteristics and the level of power loss and the intrinsic noise involved must also be taken into account. Each transmission system and each driveline system must be individually adapted from the large number of various possible solutions. This study focuses on of existing and new measures in the literature and some experimental results which were investigated at the University of Stuttgart Institute of Machine Components. The aim was to create an engineering design catalogue for low-rattle and -clatter manual automotive transmissions using the systematic measurements and the knowledge derived from experience.