Company Filing History:
Years Active: 1980-1981
Title: Kiyofumi Mizuno: Innovator in Automotive Transmission Technology
Introduction
Kiyofumi Mizuno is a prominent inventor based in Nagoya, Japan. He has made significant contributions to the field of automotive technology, particularly in the area of transmission systems. With a total of 5 patents to his name, Mizuno's work has had a substantial impact on vehicle performance and efficiency.
Latest Patents
Mizuno's latest patents include an automatic speed ratio control system for stepless transmission and a control system for a stepless variable speed transmission. The automatic speed ratio control system integrates a servo mechanism type for automotive vehicles. It utilizes a hydraulic pump motor of variable displacement, controlled by an actuator with a piston and cylinder that receives hydraulic oil. This system features a target value generator that produces engine speed or output torque targets based on throttle opening. It also includes a detector for engine speed or torque signals, a control signal generator for producing control signals based on deviations, and a controller that adjusts the speed ratio of the transmission. Notably, the system can control the alteration rate of the speed ratio based on the actuator's position, enhancing performance at various speeds.
The control system for a stepless variable speed transmission operates on a power-splitting principle. It allows for controllable speed transmission from the engine, converting part of the power into hydraulic power. This system includes an upshift valve for transitioning to high-speed ratios, a downshift valve for low-speed ratios, and a directional control valve that manages hydraulic pressure differences to optimize performance.
Career Highlights
Kiyofumi Mizuno is currently employed at Aisin Seiki Kabushiki Kaisha, a leading company in automotive technology. His work at Aisin has allowed him to develop innovative solutions that enhance vehicle transmission systems. His expertise in hydraulic systems and control mechanisms has positioned him as a key figure in automotive engineering.
Collaborations
Mizuno has collaborated with notable colleagues such as Hiroaki Maeda and Shigeo Takahashi. Their combined efforts have contributed to advancements in automotive technology and the development of efficient transmission systems.
Conclusion
Kiyofumi Mizuno's contributions to automotive transmission technology through his innovative patents and collaborations have significantly advanced the field. His work continues to influence the design and functionality of modern vehicles, showcasing the importance of innovation in automotive engineering.