Analysis of the Gear Shift Mechanisms by R-R Chart Method

2001-01-1163

03/05/2001

Event
SAE 2001 World Congress
Authors Abstract
Content
A new point of view in automatic transmission is proposed by R-R chart, which is a new analytic method based on the linearity of planetary gear and gear shift mechanism. The R-R chart is a visual tool to describe the whole motion of each rotational element of planetary gears in relation to the gear shift mechanism. Therefore, anyone can easily find on R-R chart not only the substance of the gear shift mechanisms in present automatic transmissions but also new gear shift mechanisms for the future automatic transmissions. This paper shows that the R-R chart is unique in 4-speed automatic transmissions with fixed compound planetary gear sets. As a result of the R-R chart application, this paper classifies the fixed compound planetary gear sets with 4 elements into 12 sets and the gear shift mechanisms into 3 types. Also, 4 R-R characteristic equations are derived as a correlation between speed ratios in 4-speed automatic transmissions. This paper describes systematically the gear shift mechanisms for 5- and 6-speed automatic transmission by R-R chart. Finally, this paper introduces the new gear shift mechanism for 5-speed automatic transmission with 3 clutches and 1 brake.
Meta TagsDetails
DOI
https://doi.org/10.4271/2001-01-1163
Pages
11
Citation
Park, J., and Oh, J., "Analysis of the Gear Shift Mechanisms by R-R Chart Method," SAE Technical Paper 2001-01-1163, 2001, https://doi.org/10.4271/2001-01-1163.
Additional Details
Publisher
Published
Mar 5, 2001
Product Code
2001-01-1163
Content Type
Technical Paper
Language
English