Work has been proceeding on the development of new-generation continuously variable transmissions (CVTs) since 1997. At the time JATCO introduced the world's first torque converter-type belt CVT designed for 2.0-liter class engines and incorporating electronic shift control. Thes new generation includes three belt CVTs, ranging in torque capacity from 100 to 350 Nm. The CVT3 described in this paper has the largest torque capacity of the three, handling torque levels up to a maximum of 350 Nm. These new-generation CVTs are premised on use in global markets and have been developed with the aim of achieving a more compact design, lighter weight and a wider ratio range, among other objectives. Their product appeal has been substantially enhanced based on previous experience acquired in developing a 2.0 - 2.5 liters class CVT. To improve the product appeal of these new-generation CVTs, a super ultra-flat torque converter was developed along with reducing the diameter of the primary pulley. In this connection, a new pulley pressure control system was developed, the pressure control valve was reduced in size and pressure control accuracy was enhanced, among other improvements.
Development of new-generation belt CVTs with high torque capacity for front-drive cars
Entwicklung einer neuen Generation von stufenlosen Riementrieben mit großem Drehmomentbereich für Kraftwagen mit Frontantrieb
2003
11 Seiten, 14 Bilder, 5 Tabellen, 6 Quellen
Conference paper
English
Development of new-generation belt CVTs with high torque capacity for front-drive cars
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SAE Technical Papers | 2003
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British Library Conference Proceedings | 2003
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Automotive engineering | 2004
|A Study on the Torque Capacity of Belt CVTs for 2.0-Liter and 3.5-Liter Front-Drive Cars
British Library Conference Proceedings | 2004
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