Location History:
- Ann Arbor, MI (US) (2006)
- Rochester Hills, MI (US) (2011 - 2015)
Company Filing History:
3 out of 31,024 
1 out of 3,384 
Years Active: 2006-2015
Title: Innovations of Junseok Chang
Introduction
Junseok Chang is an accomplished inventor based in Rochester Hills, MI (US). He has made significant contributions to the field of engine technology, holding a total of 3 patents. His work focuses on improving engine performance and efficiency through innovative systems and methods.
Latest Patents
One of his latest patents is titled "Cold start systems and methods." This invention involves a cylinder deactivation system that includes a fuel injection module and a cold start control module. The fuel injection module is designed to inject a desired amount of fuel into a cylinder of an engine during engine cranking. The cold start control module ensures that both the intake and exhaust valves associated with the cylinder remain closed while the fuel is injected, particularly when the air or coolant temperature is below a predetermined cold start temperature.
Another notable patent is the "Method and apparatus for continuously variable differential phasing of engine valve operation." This invention pertains to an internal combustion engine that features a crankshaft and cam-actuated intake valves. The method allows for the adjustment of the phase of the second intake cam independently of the first, enabling enhanced control over the engine's effective compression ratio and internal exhaust gas recirculation.
Career Highlights
Junseok Chang has worked with prominent organizations such as GM Global Technology Operations, Inc. and the University of Michigan. His experience in these institutions has allowed him to develop and refine his innovative ideas in engine technology.
Collaborations
Some of his notable coworkers include Paul M Najt and David J Cleary. Their collaboration has likely contributed to the advancement of engine technologies and innovations.
Conclusion
Junseok Chang's contributions to engine technology through his patents demonstrate his commitment to innovation and improvement in the automotive industry. His work continues to influence the development of more efficient and effective engine systems.