Hirofumi Maeda

Title: Hirofumi Maeda: Innovator in Internal Combustion Engine Technology

Introduction

Hirofumi Maeda is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of internal combustion engine technology, holding a total of 4 patents. His innovative approaches have advanced the efficiency and performance of combustion engines.

Latest Patents

One of Maeda's latest patents involves a control method and control device for internal combustion engines. This method sets a part of a low-medium revolution speed/low-medium load region of an internal combustion engine as a lean combustion region. It allows for homogeneous combustion in operating regions with relatively low loads by injecting fuel at least once between the intake stroke and the first half of the compression stroke. This creates a homogeneous air-fuel mixture in the combustion chamber. For higher loads, stratified combustion is performed by injecting fuel at least once during both the intake stroke and the second half of the compression stroke, forming a stratified air-fuel mixture. The ignition energy supplied to the ignition plug during stratified combustion is controlled to be smaller than that during homogeneous combustion.

Another patent by Maeda also focuses on a control method for internal combustion engines. This method aims to form a stratified air-fuel mixture in the combustion chamber and perform stratified combustion. Spark ignition is initiated by flowing a relatively large discharge current into the ignition plug when the flow energy around it is increased by the fuel spray injected in the second half of the compression stroke. The discharge current is then reduced and maintained for a predetermined period.

Career Highlights

Hirofumi Maeda has worked with prominent companies in the automotive and gaming industries. He has been associated with Nissan Motor Company Limited, where he contributed to advancements in automotive technology. Additionally, he has worked with Sega Corporation, further showcasing his diverse expertise.

Collaborations

Maeda has collaborated with notable individuals in his field, including Masaharu Kassai and Toshiyuki Kaji. These collaborations have likely enriched his work and contributed to his innovative patents.

Conclusion

Hirofumi Maeda is a distinguished inventor whose work in internal combustion engine technology has led to several patents. His innovative methods for improving engine efficiency demonstrate his significant impact on the industry. His contributions continue to influence advancements in automotive technology.