Shigeki Takeshima

Title: Shigeki Takeshima: Innovator in Engine Lubrication Technologies

Introduction

Shigeki Takeshima is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of engine lubrication, holding a total of 5 patents. His innovative methods have advanced the efficiency and performance of internal combustion engines.

Latest Patents

Takeshima's latest patents include a method for lubricating internal combustion engines. This method involves supplying a lubricating oil composition to a cylinder of an internal combustion engine, which operates at a mean effective pressure of no less than 1.3 MPa. The method specifies that the integrated intensity ratio of peaks of CaO in a X-ray diffraction spectrum of the ash must be no more than 16.5%, with the ash obtained by incinerating the lubricating oil composition at 950°C. Another notable patent is for a cylinder lubricating oil composition designed for crosshead diesel engines. This composition features a sulfated ash content of 2.0 to 5.5 mass %, a base number ranging from 15 to 45 mgKOH/g, and an autoignition temperature of no less than 262°C.

Career Highlights

Throughout his career, Shigeki Takeshima has worked with notable companies such as JX Nippon Oil Energy Corporation and Eneos Corporation. His experience in these organizations has allowed him to develop and refine his innovative lubrication technologies.

Collaborations

Takeshima has collaborated with various professionals in his field, including his coworker Naozumi Arimoto. Their joint efforts have contributed to the advancement of lubrication technologies in the automotive industry.

Conclusion

Shigeki Takeshima's work in engine lubrication has made a significant impact on the industry. His innovative patents and collaborations highlight his dedication to improving engine performance and efficiency.