Company Filing History:
Years Active: 1996-2005
Title: Innovations by Hirohisa Kishi
Introduction
Hirohisa Kishi is a notable inventor based in Nagoya, Japan. He has made significant contributions to the field of internal combustion engines, holding a total of 7 patents. His work focuses on enhancing engine performance and efficiency through innovative control mechanisms.
Latest Patents
One of Kishi's latest patents is a valve timing controller for internal combustion engines. This controller calculates a duty correction value using an arithmetic expression that reflects a physical model associated with torque applied to an exhaust valve camshaft, spring force from an advancing spring, and hydraulic pressure of operating oil. Notably, when the coolant temperature is below 80°C, the controller sets the duty correction value to zero. This design allows for easy acquisition of the duty correction value without relying on a data-intensive map.
Another significant patent is an apparatus and method for controlling internal combustion engines. This controller restricts the operation amount of the variable valve actuation mechanism during transient operation states, where engine output increases. When the mechanism is determined to be in a locked state, the controller relaxes the restrictions, thereby improving the follow-up performance of valve properties while minimizing temporary stagnation in engine rotational speed during vehicle acceleration.
Career Highlights
Hirohisa Kishi is currently employed at Toyota Jidosha Kabushiki Kaisha, a leading automotive manufacturer. His work at Toyota has allowed him to apply his innovative ideas in a practical setting, contributing to advancements in engine technology.
Collaborations
Kishi has collaborated with notable coworkers such as Masanao Idogawa and Seiji Hirowatari. Their combined expertise has fostered a creative environment that encourages the development of cutting-edge technologies in the automotive industry.
Conclusion
Hirohisa Kishi's contributions to the field of internal combustion engines through his patents and work at Toyota highlight his innovative spirit and dedication to engineering excellence. His inventions continue to influence the automotive industry, paving the way for more efficient and powerful engines.