Kim Sangkyu

Title: Innovations by Kim Sangkyu in Diesel Engine Technology

Introduction

Kim Sangkyu is a notable inventor based in Higashihiroshima, Japan. He has made significant contributions to the field of diesel engine technology, holding a total of 5 patents. His work focuses on improving the efficiency and performance of diesel engines, particularly in vehicles.

Latest Patents

One of Kim's latest patents is a diesel engine designed for vehicles. This innovative engine includes an engine body with a cylinder that is supplied with fuel primarily containing diesel. The geometric compression ratio of the cylinder is set within a range of 12:1 to 15:1. Additionally, it features an Exhaust Gas Recirculation (EGR) system that allows a portion of burned gas to remain inside the engine body cylinder during specific operating conditions, particularly when the engine load and speed are relatively low. The EGR system comprises an EGR passage partially formed within the engine body, an EGR control valve for adjusting the flow rate of burned gas, and a controller to manage the valve's opening.

Another significant patent by Kim is a method and device for controlling a diesel engine. This method involves adjusting the EGR ratio based on engine load to gradually decrease the cylinder oxygen concentration to a predetermined level as the load increases. The engine operates in a premix combustion mode at low loads, where fuel injection is halted before the top dead center of the compression stroke, leading to efficient combustion. In higher load conditions, the engine switches to a diffusion combustion mode, where fuel injection occurs simultaneously with ignition.

Career Highlights

Kim Sangkyu 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 performance and environmental efficiency of diesel engines.

Collaborations

Throughout his career, Kim has collaborated with talented individuals such as Daisuke Shimo and Kyotaro Nishimoto. These collaborations have contributed to the development of cutting-edge technologies in the automotive industry.

Conclusion

Kim Sangkyu's contributions to diesel engine technology reflect his dedication to innovation and efficiency. His patents and work at Mazda Motor Corporation highlight his role as a leading inventor in the automotive sector.