This inventor holds 4 USPTO granted patents and 1 published patent application. Top assignees: Gm Global Technolgoy Operations, Inc., Electro-Motive Diesel, Inc.. Active years: 1999-2008.
Company Filing History:
3 out of 31,869 
1 out of 244 Years Active: 1999-2008
Title: Innovations by Chih L Liu
Introduction
Chih L Liu is a notable inventor based in Naperville, IL (US), recognized for his contributions to the field of internal combustion engines. With a total of 4 patents, Liu has made significant strides in optimizing engine performance while adhering to stringent emission standards.
Latest Patents
One of Liu's latest patents is the "Optimized Low Emission Two-Stroke Internal Combustion Diesel Engine." This innovative engine is designed for locomotive applications and meets the EPA locomotive Tier 2 emission standards. To achieve a low emission target below the EPA Tier 2 standards for NO (5.5 g/bhp-hr) and particulates (0.2 g/bhp-hr), several innovative changes have been implemented. These changes include a new piston bowl geometry, low oil consumption piston rings, an optimized surface finish cylinder liner, an optimized fuel injection cam lobe, a modified fuel injector nozzle, a new efficient aftercooler, an optimized oil separator, and an optimized turbocharger.
Another significant patent is the "Emission Reduction Kit for EMD Diesel Engines." This kit is developed for NOx emission reduction in Electro-Motive Division of General Motors Corporation model 645 diesel engines. The kits feature improved unit fuel injectors that provide better fuel atomization with retarded injection timing and other enhancements. New higher efficiency four-pass counterflow aftercoolers are included to reduce airbox inlet air temperatures. Optional higher compression ratio pistons are also available for increased fuel efficiency in certain engine types. These kits effectively reduce NOx emissions without increasing smoke, CO, or particulate emissions or compromising performance.
Career Highlights
Chih L Liu has worked with prominent companies such as GM Global Technology Operations, Inc. and Electro-Motive Diesel, Inc. His work has focused on developing innovative solutions to enhance engine efficiency and reduce harmful emissions.
Collaborations
Liu has collaborated with talented individuals in the field, including Rafiqul Islam and Budhadeb Mahakul. Their combined expertise has contributed to the successful development of advanced engine technologies.
Conclusion
Chih L Liu's innovative work in the field of internal combustion engines has led to significant advancements in emission reduction and engine performance. His patents reflect a commitment to creating efficient and environmentally friendly solutions in the automotive industry.