Bridgestone develops dynamic shock absorber type in-wheel motor system IIIth generation

Bridgestone (President Watanabe Shift) successfully developed the in-wheel motor drive system for electric vehicles - Bridgestone Dynamic Shock Absorber In-Wheel Motor System Generation III (Bridgestone Dynamic-Damper Type In-wheel Motor System).

Bridgestone released this in-wheel motor system in September 2003. Subsequently, in September 2004, improvements were made to miniaturization and practical use, and the "Second Generation" was released. The "IIIth Generation" released this time is based on other previous perspectives, and is small and lightweight improvements for small tire sizes.

Electric vehicles are attracting attention as a new generation of car types, and various driving methods are under study. In-wheel motors are one of them. The advantage of this type of driving method is that it can improve the performance of the vehicle and the freedom of design of the vehicle body, and at the same time, it can expand the space inside the vehicle. On the other hand, however, it also has disadvantages such as an increase in weight under the suspension device, a deterioration in ride comfort, and deterioration in exercise stability due to a decrease in tire landing performance.

"Bridgestone Dynamic Shock Absorber Type In-Wheel Motor System" is a new system that improves the shortcomings of the conventional in-wheel motor drive system while improving its deficiencies. In addition to the above advantages, the "third generation" developed this time has changed the motor from the outer rotor to the inner rotor, and the other parts have been improved. Therefore, the system itself is smaller than the "second generation". Lightweight.

This "Bridgestone Dynamic Shock Absorber Type In-Wheel Motor System Generation III" is the same as the "IIth Generation" system. Since 2000, it has been working with Bridgestone on the joint research of suspension and peripheral parts. The company was developed by Akaibo Industrial Co., Ltd., Akebono Brake Industry Co., Ltd. In the future, Bridgestone will further develop research on the practical application of “IIth Generation” and “IIIth Generation”. At the same time, Bridgestone hopes that it will not only be limited to tires, but will also contribute to the development of the automotive society through the development, research, development and proposals of peripheral systems including tires.

The "Genesis Dynamic Shock Absorber Type In-Wheel Motor System Generation III" is summarized as follows:

1. "The third generation of Bridgestone dynamic shock absorber type in-wheel motor system" advantages:

(1) Miniaturization: Applicable to wheels over 14 inches

(※ Generation II: 18 inches or more, Generation I: 19 inches)

(2) Lightweight: The weight of the motor unit is about 60% of the past

2. "The third generation of Bridgestone dynamic shock absorber type in-wheel motor system" basic structure

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