Yoshitaka Tanikawa

Title: Yoshitaka Tanikawa: Automotive Engine and Emissions Innovations.

Introduction

Yoshitaka Tanikawa is an inventor associated with Higashihiroshima, Japan, and Mazda Motor Corporation. His work includes inventions addressing automobile exhaust purification and engine idling control. His patent record includes 2 patents.

Latest Patents

Tanikawa’s listed patents focus on improving emissions-system operation and maintaining stable engine performance.

Automobile Exhaust Purifying System

This invention describes an automobile engine exhaust system that routes emissions through a catalytic converter. A temperature detector monitors the catalyst, while another detector tracks the engine’s total operating hours. When the catalyst temperature falls below a specified threshold, the system retards spark timing. It also adjusts the amount of spark-timing control according to accumulated engine operating time within a predetermined range.

Engine Idling Speed Control

This invention concerns an internal combustion engine with a valve that regulates intake airflow during idling. A control circuit compares detected engine speed with a reference value and adjusts the valve to maintain the desired idle speed. When an external load is applied or removed, the system temporarily interrupts feedback control to help stabilize engine speed during the transition.

Career Highlights

The two listed inventions reflect a focus on automotive engineering, particularly exhaust purification and engine control. Both address operating conditions that can affect vehicle emissions or engine stability.

Collaborations

Tanikawa is associated with Mazda Motor Corporation. His listed coworkers include Nobuhiro Hayama and Takeshi Yoshimura.

Conclusion

Yoshitaka Tanikawa’s patent work highlights practical approaches to catalytic-converter temperature management and stable engine idling in automotive systems.