초록 ▼

A method and system for late cycle injection of oxygen enriched air into the combustion chamber of an internal combustion engine is disclosed. The late cycle oxygen injection system is part of an airflow management system that effectively controls the use of oxygen and nitrogen available in the inta

A method and system for late cycle injection of oxygen enriched air into the combustion chamber of an internal combustion engine is disclosed. The late cycle oxygen injection system is part of an airflow management system that effectively controls the use of oxygen and nitrogen available in the intake air. The preferred system comprises an intake air separation device adapted for separating a prescribed portion of intake air into a flow of oxygen enriched air and a flow of nitrogen enriched air. The system includes an oxygen enriched air flow circuit extending from the intake air separating device to one or more combustion chambers and a control device adapted for controlling the introduction of the oxygen enriched air into the combustion chambers late in a combustion cycle in response to selected engine operating conditions such as engine speed or engine load or both. Preferably, the introduction of the oxygen enriched air into the combustion chamber occurs late in a combustion cycle at a crank angle between about 20 degrees and 120 degrees after top dead center and lasts for a prescribed time interval between about 5 degrees and 20 degrees of crank angle movement.

대표청구항 ▼

[ We claim:] [1.] An air flow management system for an internal combustion engine, said engine having an intake manifold and at least one combustion chamber, an intake air system adapted for providing intake air to said intake manifold and said combustion chamber, and an exhaust system adapted for t

[ We claim:] [1.] An air flow management system for an internal combustion engine, said engine having an intake manifold and at least one combustion chamber, an intake air system adapted for providing intake air to said intake manifold and said combustion chamber, and an exhaust system adapted for transporting exhaust gases from said combustion chamber, said air flow management system comprising:intake air separation device disposed within said intake air system and adapted for separating a prescribed portion of intake air into a flow of said oxygen enriched air and a flow of nitrogen enriched air;an oxygen,enriched air flow circuit extending from said intake air separating device to said combustion chamber while circumventing said intake manifold;a flow control device disposed along said oxygen enriched air flow circuit, said flow control device adapted for introducing said oxygen enriched air from said oxygen enriched air circuit into said combustion chamber; anda controller operatively coupled to said flow control device and adapted to control the introduction of said oxygen enriched air into said combustion chamber late in a combustion cycle in response to selected engine operating conditions.