Review of Wet Friction Component Models for Automatic Transmission Shift Analysis

2003-01-1665

05/05/2003

Event
SAE 2003 Noise & Vibration Conference and Exhibition
Authors Abstract
Content
In a step-ratio automatic transmission system, wet friction components are widely utilized to alter planetary gear configurations for automatic shifting. Thus, their engagement characteristics have a direct impact on shift quality or drivetrain NVH. A vehicle design process can benefit from predictive friction component models that allow analytical shift quality evaluation, leading to reduced development time. However, their practical application to shift analysis is seldom discussed in the literature although there are many references available for friction component modeling itself. A successful shift analysis requires a balance of model complexity, predictability and computational efficiency for a given objective. This paper reviews three types of friction component models found in today's open literature, namely, first principle based, algebraic, and empirical models. Model structure, assumptions, computational efficiency, and utilities are discussed. Illustrative examples are given to demonstrate model applications to shift analysis.
Meta TagsDetails
DOI
https://doi.org/10.4271/2003-01-1665
Pages
19
Citation
Fujii, Y., Tobler, W., Pietron, G., Cao, M. et al., "Review of Wet Friction Component Models for Automatic Transmission Shift Analysis," SAE Technical Paper 2003-01-1665, 2003, https://doi.org/10.4271/2003-01-1665.
Additional Details
Publisher
Published
May 5, 2003
Product Code
2003-01-1665
Content Type
Technical Paper
Language
English