Ruonan Sun

Title: Ruonan Sun: Innovator in HCCI Engine Technology

Introduction

Ruonan Sun is a prominent inventor based in Ann Arbor, MI (US). She has made significant contributions to the field of engine technology, particularly in the development of homogeneous charge compression ignition (HCCI) engines. With a total of 2 patents, her work focuses on enhancing engine performance and efficiency.

Latest Patents

One of her latest patents is titled "Method and system of transient control for homogeneous charge compression ignition (HCCI) engines." This innovative system maintains stable HCCI combustion during speed and load transitions by estimating the maximum rate of pressure rise (MRPR) for each cycle. It utilizes an extra-cylinder sensor metric, such as crankshaft dynamics or knock sensor metrics, through statistical vector-to-vector correlation. The system periodically self-tunes the vector-to-vector correlation and applies knowledge base models to guide adjustments of fuel quantity and other engine parameters to maintain a target MRPR value.

Another notable patent is for an "HCCI engine with combustion-tailoring chamber." This design adapts an internal combustion engine for operation with homogeneous combustion and compression ignition. The engine features multiple cylinders, each with a piston defining the main combustion chamber, connected to a crankshaft for reciprocating motion. An auxiliary combustion chamber and an inlet passage are formed in the engine head for each cylinder, equipped with control valves to manage communication between the main and auxiliary combustion chambers.

Career Highlights

Ruonan Sun works for the United States of America as represented by the Administrator of the U.S. Environmental Protection Agency. Her role involves advancing research and development in environmentally friendly engine technologies.

Collaborations

She has collaborated with notable coworkers, including Karl H Hellman and Charles L Gray, Jr. Their combined expertise contributes to the innovative advancements in engine technology.

Conclusion

Ruonan Sun's contributions to HCCI engine technology demonstrate her commitment to improving engine performance and environmental sustainability. Her patents reflect a deep understanding of combustion processes and control systems, positioning her as a key figure in the field.