Configuration design of six-speed automatic transmissions with two-degree-of-freedom planetary gear trains

Wen Miin Hwang, Yu Lien Huang

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

A methodology is proposed herein to search for and synthesize feasible configurations of six-speed automatic transmissions based on planetary gear trains with two degrees of freedom. A screening rule is first proposed to search for workable two-degree-of-freedom planetary gear trains for six-speed automatic transmissions. Based on the requirement of clutch-to-clutch shifts, a new algorithm to classify and permute speed ratios for feasible clutching sequences is presented. Six feasible configurations of six-speed automatic transmissions are found using the proposed methodology. By using an exhaustive search method, the ten best combinations of the number of gear teeth for a specific planetary gear train are then obtained to minimize the differences between the set of desired speed ratios and that of speed ratios generated algorithmically. Finally, the mechanical efficiencies of the ten planetary gear trains are calculated for evaluation.

Original languageEnglish
Pages (from-to)41-55
Number of pages15
JournalTransactions of the Canadian Society for Mechanical Engineering
Volume29
Issue number1
DOIs
Publication statusPublished - 2005 Jan 1

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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