オートマチックトランスミッション用摩擦材の開発

抄録

Automatic transmission is a device to automatically transfer the power from the engine of a car to the driving wheels with different speed ratios. It is desirable that the transferring be comfortable, smooth, and low in fuel consumption.

Inside the automatic transmission, there are many clutch mechanisms assembled as the elements for speed changes. These clutches are attached with a wet friction material required to have a good friction characteristic and stability. In this study, parameter design was applied to develop the friction material early in the development, ie., before the development of new types of automatic transmissions. From the study, the friction material with a good functionality was developed, together with many successful results.