Hirokimi Koyama

Title: Hirokimi Koyama: Innovator in Vehicle Control Technologies

Introduction

Hirokimi Koyama is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of vehicle control technologies, holding 2 patents that enhance engine performance and efficiency. His work is particularly relevant in the context of modern automotive engineering.

Latest Patents

Koyama's latest patents include a control device for vehicles and a system for measuring the amount of air introduced into the combustion chamber. The control device allows an internal combustion engine at a standstill after cold starting to switch its combustion mode to either a homogeneous or stratified combustion mode. This innovation expands the operation range of stratified combustion while ensuring the necessary intake air negative pressure for optimal brake performance, thereby reducing hydrocarbon emissions during cold starts. The second patent focuses on a system that measures the intake air amount introduced into an engine cylinder, utilizing a throttle angle sensor to derive the basic intake air flow amount. This system corrects for delays in air introduction and compensates for variations in air density due to temperature changes.

Career Highlights

Koyama is currently employed at Nissan Motor Company Limited, where he applies his expertise in automotive technologies. His work has been instrumental in developing systems that improve vehicle performance and environmental sustainability.

Collaborations

Koyama has collaborated with notable colleagues such as Hiromichi Miwa and Hatsuo Nagaishi, contributing to advancements in vehicle technology through teamwork and shared expertise.

Conclusion

Hirokimi Koyama's innovative patents and contributions to Nissan Motor Company Limited highlight his role as a key figure in the automotive industry. His work continues to influence the development of more efficient and environmentally friendly vehicle technologies.