Takafumi Arakawa

Title: Takafumi Arakawa: Innovator in Internal Combustion Engine Control

Introduction

Takafumi Arakawa is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of internal combustion engine control, holding a total of 3 patents. His work focuses on enhancing the efficiency and reliability of engine performance.

Latest Patents

Arakawa's latest patents include an internal combustion engine control device designed to prevent transmission shocks and idling defects, such as engine racing and rough idling due to the aging of the throttle opening area. This innovative control apparatus utilizes an air flow rate sensor to measure the actual air rate flowing into the engine's cylinder. It features a throttle valve controlling section that adjusts the throttle opening based on a target air rate to achieve the desired torque. Additionally, it includes a throttle opening correcting section that modifies the preset throttle opening during fuel cutoff situations.

Another significant patent is a novel control device capable of accurately estimating the EGR (Exhaust Gas Recirculation) amount during transient states. This device determines the first EGR rate using a detection signal from an EGR sensor located downstream of the throttle valve. It also estimates a second EGR rate through a predetermined equation that incorporates signals from an air flow sensor and an EGR valve opening degree sensor. The device further processes the second EGR rate to account for response delays, ensuring precise control.

Career Highlights

Throughout his career, Takafumi Arakawa has worked with prominent companies such as Hitachi Automotive Systems and Hitachi Astemo. His experience in these organizations has allowed him to develop and refine his innovative ideas in engine control technology.

Collaborations

Arakawa has collaborated with notable colleagues, including Yoichi Iihoshi and Toshio Hori. Their combined expertise has contributed to the advancement of internal combustion engine technologies.

Conclusion

Takafumi Arakawa's contributions to internal combustion engine control demonstrate his commitment to innovation and excellence in engineering. His patents reflect a deep understanding of engine dynamics and a drive to improve automotive performance.