Company Filing History:
5 out of 2,546 
2 out of 133 
1 out of 832,891 Years Active: 1996-2005
Title: Karl H Hellman: Innovator in Internal Combustion Engine Technology
Introduction
Karl H Hellman is a notable inventor based in Ann Arbor, MI (US). He has made significant contributions to the field of internal combustion engines, holding a total of 8 patents. His work focuses on enhancing engine efficiency and performance through innovative designs.
Latest Patents
One of his latest patents is the HCCI engine with a combustion-tailoring chamber. This internal combustion engine is designed for operation with homogeneous combustion and compression ignition. It features multiple cylinders, each with a piston that defines the main combustion chamber, connected to a crankshaft for reciprocating motion. The engine includes an auxiliary combustion chamber and an inlet passage for each cylinder, equipped with control valves to manage communication between the chambers. The inlet valve operates with the crankshaft's rotation, while the combustion control valve functions independently, allowing for precise control of homogeneous combustion.
Another significant patent is the individual cylinder coolant control system and method. This system regulates cylinder temperature in a multi-cylinder internal combustion engine. It consists of an inlet rail for coolant, an outlet rail on the opposite side of the cylinder head, and individual coolant flow passages connecting the two. Each passage contains a control valve and temperature sensor, enabling individual control of coolant flow based on real-time temperature readings. This innovation aims to maintain optimal temperatures for engine performance.
Career Highlights
Throughout his career, Karl H Hellman has worked with various organizations, including the United States of America as represented by the Administrator of the U.S. Environmental Protection Agency. His expertise in engine technology has made him a valuable asset in the field.
Collaborations
He has collaborated with notable individuals such as Charles L Gray, Jr and Michael J Safoutin, contributing to advancements in engine technology through teamwork and shared expertise.
Conclusion
Karl H Hellman's innovative work in internal combustion engine technology has led to significant advancements in engine efficiency and performance. His contributions continue to influence the automotive industry and enhance our understanding of engine dynamics.