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Toothed Chain CVT: Opportunities and Challenges

Journal Article
2017-01-9677
ISSN: 1946-3995, e-ISSN: 1946-4002
Published March 14, 2017 by SAE International in United States
Toothed Chain CVT: Opportunities and Challenges
Sector:
Citation: Duan, C., Yao, J., and Huang, Y., "Toothed Chain CVT: Opportunities and Challenges," SAE Int. J. Passeng. Cars - Mech. Syst. 10(1):38-42, 2017, https://doi.org/10.4271/2017-01-9677.
Language: English

Abstract:

A toothed chain continuously variable transmission concept is studied. By designing positive engagement at top overdrive ratio, we explored the potential to improve CVT mechanical efficiency. The low cost solution could improve fuel economy by 0.7% in FTP composite cycle. Preliminary multi-body dynamic simulation is also completed using VL-Motion to concept-proof the technical feasibility of disengagement and engagement. To address the noise issue resulted from abandoning the random pitch design in production chain, we proposed an alternate chain pitch sequence but more experimental data is required to validate the design.