This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of New Continuously Variable Transmission for 2.0-Liter Class Vehicles
Technical Paper
2018-01-1062
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Toyota has developed a new continuously variable transmission (CVT) called "Direct Shift-CVT" which is for 2.0-liter class vehicles. This CVT provided not only power transmission by a metal belt held with a conventional pulley but also additional gear mechanism. This CVT is developed to improve fuel efficiency, acceleration characteristic, and quietness.
At this CVT, the startup low gear ratio is achieved by gear mechanism and the power is switched by clutches. Since the belt-pulley portion can be realized to be wide range by using only high gear ratio range, the input load into belt-pulley portion is reduced and unprecedented compact and high efficient belt-pulley portion is established. Consequently, the high efficiency in all fields from startup acceleration to high speed driving is achieved to improve fuel efficiency. In order to achieve emotional driving performance, driving force is optimized by switching the gears and the belt-pulley portion based on the operation of drivers and driving scenes. Moreover, a new control technology improves shift response in sequential shiftmatic mode.
This paper describes details about new control technology applied to the Direct Shift-CVT, and some concrete examples of improvements of vehicle characteristics.
Recommended Content
Authors
Topic
Citation
Niii, D., Kondo, H., Washio, T., Kuwabara, S. et al., "Development of New Continuously Variable Transmission for 2.0-Liter Class Vehicles," SAE Technical Paper 2018-01-1062, 2018, https://doi.org/10.4271/2018-01-1062.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 |
Also In
References
- Aoyama , T. et al. Development of TOYOTA New Generation Continuously Variable Transmission SAE Technical Paper 2014-01-1728 2014 10.4271/2014-01-1728
- Tawara , T. et al. Development of Driving Force Control Technology of CVT for North American Market SAE Technical Paper 2014-01-1730 2014 10.4271/2014-01-1730
- Ogata , Y. , Ninomiya , K. , Kurisawa , S. , and Tamura , N. Development of CVT for 1.5L-class FWD-vehicle Proceedings of the Society of Automotive Engineers of Japan 2012
- Hattori , K. , Toyoda , S. , Inoue , D. , and Shimozato , Y. Development of Ratio Control System for Toyota's New Continuously Variable Transmission SAE Int. J. Passeng. Cars - Electron. Electr. Syst. 6 1 144 151 2013 10.4271/2013-01-0367
- Hakamagi , J. et al. Development of New Continuously Variable Transmission for 2.0-Liter Class Vehicles SAE Technical Paper 2015-01-1101 2015 10.4271/2015-01-1101