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Synchronizer and Shift System Optimization for Improved Manual Transmission Shiftability
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English
Abstract
The R30A manual transmission mounted in the new Nissan 300ZX was developed to optimize shif-tability. Numerous performance improvements were made to achieve that goal, centering particularly on the development of a new double-cone synchronizer. Several new techniques were developed to evaluate shiftability quantitatively and supplemented conventional procedures, which are primarily based on subjective evaluation methods. As a result, the R30A transmission provides shiftability optimized for use in a high-performance sports car. This paper presents the methods used in evaluating shiftability and describes the features of the R30A that contribute to improved shiftability. It also presents the results of experiments carried out to confirm the improved performance.
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Citation
Murata, S., Mori, Y., Doi, T., Takada, T. et al., "Synchronizer and Shift System Optimization for Improved Manual Transmission Shiftability," SAE Technical Paper 891998, 1989, https://doi.org/10.4271/891998.Also In
References
- Goto Yuji Yagi Yoichi et al. “Shift Feel in Manual Transmissions - An Analysis of Unsmooth Shift and Gear Clashing -,” JSAE Review 9 4 October 1988
- Richard J. Socin Halters L. Kirk “Manual Transmission Synchronizers” SAE Paper 680008
- Yoshio Shinto Shigeki Hiramatsu “An Investigation of Manual Transmission Shiftability,” Preprint of JSAE 822B48,(in Japanese)
- Shigeo Murata Yukihiro Noguchi “Development of a Double-cone Synchronizer,” Nissan Technical Review 24 1988 Japanese