Youhei Ishikawa is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of transmission technology, holding a total of 6 patents. His work focuses on enhancing the efficiency and functionality of automatic transmissions.

Latest Patents

Ishikawa's latest patents include a control device for continuously variable transmission. This device features an auxiliary transmission with a variator, a hydraulic pressure control circuit with a primary pressure solenoid, and a transmission ratio controller that utilizes feedback control to manage the transmission ratio of the variator. The transmission ratio controller is equipped with a high limiter control unit that limits the transmission ratio to a high limit line upon receiving a high transmission ratio limiting request. Additionally, it includes a primary pressure lower limit regulation control unit that regulates the decrease of primary command pressure to the primary pressure solenoid during high limiter control operations.

Another notable patent involves an automatic transmission with a speed changer that has multiple engagement elements. This system is designed to shift the speed changer into a selected shift stage by managing the engaged and disengaged states of these elements. It incorporates a first rotation sensor to detect input rotation and a second rotation sensor for output rotation. The transmission controller is programmed to identify changes in input torque and determine if interlock has occurred in the speed changer.

Career Highlights

Youhei Ishikawa is currently employed at Jatco Corporation, where he continues to innovate in the field of transmission systems. His expertise and inventions have significantly impacted the automotive industry, particularly in enhancing the performance of automatic transmissions.

Collaborations

Ishikawa has collaborated with notable colleagues such as Hiroyasu Tanaka and Tatsuo Wakahara. Their combined efforts have contributed to advancements in transmission technology.

Conclusion

Youhei Ishikawa is a distinguished inventor whose work in transmission technology has led to several important patents. His contributions continue to shape the future of automotive engineering.

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