Developing Mode Shift Strategies for a Two-Mode Hybrid Powertrain with Fixed Gears

Event
SAE World Congress & Exhibition
Authors Abstract
Content
Two-mode hybrid architectures with three planetary gear sets and four clutches will bring both flexibility and complexity to energy management of powertrains. In order to take full advantage of the increased degrees of freedom, highly delicate operation strategies are needed. We develop transmission efficiency models for power-split modes, and present a mode shift strategy assuming no battery power. When battery load leveling is additionally considered, the respective optimal operation set for each mode can be obtained and compared to yield a mode shift algorithm for general hybrid operation situations. The investigation of the strategies shows how frequently each mode is used, and verifies the effectiveness of fixed gear operations. We check the validity of the strategies by applying the algorithm to dynamic optimization and by predicting how it works during an actual driving simulation.
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DOI
https://doi.org/10.4271/2008-01-0307
Pages
8
Citation
Ahn, K., and Cha, S., "Developing Mode Shift Strategies for a Two-Mode Hybrid Powertrain with Fixed Gears," SAE Int. J. Passeng. Cars - Mech. Syst. 1(1):285-292, 2009, https://doi.org/10.4271/2008-01-0307.
Additional Details
Publisher
Published
Apr 14, 2008
Product Code
2008-01-0307
Content Type
Journal Article
Language
English