Keiji Ohshima

Title: **Innovative Contributions of Keiji Ohshima**

Introduction

Keiji Ohshima is an esteemed inventor based in Gamagoori, Japan, recognized for his significant contributions to the field of exhaust emission control. With a total of 4 patents to his name, Ohshima has demonstrated a commitment to innovation that addresses critical environmental challenges.

Latest Patents

Among his recent inventions, Ohshima has developed an **Exhaust Emission Control Device**, which features an additive valve and a control unit designed to reduce nitrogen oxides (NOx) in exhaust gas using a reducing agent. The control unit operates by alternating valve opening and closing periods in a cycle, ensuring that the agent is discharged in a manner that is dependent on the flow rate of the exhaust gas. This innovative approach allows for an appropriate penetration force of the reducing agent, enhancing the deoxidation process for nitrogen oxides.

Another notable patent is the **Exhaust Gas Purifying System**, which integrates an additive agent injection valve and a catalyst unit within the exhaust gas tube. This system effectively injects a urea solution into the flowing exhaust gas, utilizing a two-part spray mechanism that optimizes the distance of the agent's travel, thereby improving the overall efficiency of pollutant reduction.

Career Highlights

Keiji Ohshima has garnered experience working for notable companies such as Denso Corporation and Nippon Soken, Inc. His roles in these organizations have played a significant part in his development as an inventor, allowing him to apply his knowledge towards practical solutions in engineering and environmental technology.

Collaborations

Throughout his career, Ohshima has collaborated with several esteemed colleagues, including Ataru Ichikawa and Shinichiro Kawakita. These partnerships have facilitated the exchange of ideas and innovations, further enhancing the quality and impact of his inventions in the field.

Conclusion

Keiji Ohshima's work exemplifies the spirit of innovation that is essential in tackling modern environmental issues. His inventions, notably in exhaust emission control, demonstrate a proactive approach to reducing pollutants and furthering sustainable engineering practices. His contributions not only reflect personal achievement but also serve as a valuable resource for industries working towards cleaner technologies.