Yasuyuki Terazawa

Title: Yasuyuki Terazawa: Innovator in Diesel Engine Technology

Introduction

Yasuyuki Terazawa is a prominent inventor based in Aki-gun, Japan. He has made significant contributions to the field of diesel engine technology, holding 2 patents that focus on improving fuel efficiency and reducing harmful emissions.

Latest Patents

One of his latest patents is a combustion control apparatus for a diesel engine. This invention aims to suppress the deposition of fuel injected at an early timing on a wall surface, which helps prevent degradation in fuel efficiency and an increase in harmful components in exhaust gas. The apparatus controls the injector to create a combustion configuration dominated by compressive ignition while the engine operates in the premixed combustion region on the low load side. It adjusts the pulse width and fuel pressure according to changes in injection timing and corrects them based on intake air temperature or pressure. If the allowable pulse width is insufficient to inject the required fuel for target torque, the fuel is injected in a divided manner.

Another notable patent is a combustion control apparatus for an engine, which optimizes the ignition timing of the premixture to improve fuel efficiency. This invention is designed to function effectively despite significant changes in the EGR ratio or fluctuations in the temperature of recirculated exhaust gas and combustion chamber temperature. The control apparatus manages an injector that executes a main-injection to increase the EGR ratio, achieving premixed compressive ignition combustion. Just before or after a cool flame reaction occurs, an auxiliary-injection is executed to lower the mixture temperature, delaying ignition to a timing near TDC. The amount of auxiliary-injection is adjusted based on the estimated EGR ratio or changes in crank angular velocity.

Career Highlights

Yasuyuki Terazawa is currently employed at Mazda Motor Corporation, where he continues to innovate in the field of diesel engine technology. His work has been instrumental in advancing the efficiency and environmental performance of diesel engines.

Collaborations

He has collaborated with notable coworkers, including Motoshi Kataoka and Hiroshi Hayashibara, contributing to the development of cutting-edge technologies in the automotive industry.

Conclusion

Yasuyuki Terazawa's contributions to diesel engine technology through his innovative patents demonstrate his commitment to enhancing fuel efficiency and reducing emissions. His work at Mazda Motor Corporation continues to influence the automotive industry positively.