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

Bridgestone, led by President Watanabe, has made significant progress in the development of in-wheel motor systems for electric vehicles. The company introduced the Bridgestone Dynamic Shock Absorber In-Wheel Motor System Generation III, also known as the "Dynamic-Damper Type In-Wheel Motor System." This innovation marks a major step forward in the evolution of electric vehicle technology. The first version of this system was launched in September 2003, and in September 2004, the second generation was released with improvements focused on miniaturization and practical application. Now, the third generation has been developed with further enhancements, particularly for smaller tire sizes. This makes it more versatile and suitable for a wider range of vehicles. In-wheel motor technology is gaining attention as a promising approach for electric vehicles. It offers benefits such as improved vehicle performance, greater design flexibility, and more interior space. However, traditional in-wheel motors have drawbacks, including increased unsprung weight, reduced ride comfort, and potential issues with handling and tire contact. The Bridgestone Dynamic Shock Absorber In-Wheel Motor System addresses these challenges. By integrating a shock absorber function into the motor system, it helps maintain better ride quality and stability. In the third generation, the motor has been redesigned from an outer rotor to an inner rotor configuration, which contributes to a more compact and lightweight system compared to its predecessor. This system has been developed in collaboration with Akaibo Industrial Co., Ltd. and Akebono Brake Industry Co., Ltd. Since 2000, Bridgestone has been working closely with these partners on joint research into suspension systems and related components. Looking ahead, the company plans to continue developing both the second and third generations for real-world applications. Bridgestone aims to go beyond just tires and contribute to the broader automotive industry through the development of peripheral systems. The goal is to support the growth of electric mobility and sustainable transportation solutions. Key features of the third generation include: 1. **Miniaturization**: Suitable for wheels of 14 inches or larger (compared to 18 inches for the second generation and 19 inches for the first). 2. **Lightweight Design**: The motor unit weighs about 60% less than previous versions. The third-generation system represents a major advancement in in-wheel motor technology, combining efficiency, performance, and practicality for future electric vehicles.

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