COMBUSTION CONTROLLED NOX REDUCTION METHOD AND DEVICE

摘要

In this invention, there is provided a method for reducing NOx emission from an internal combustion engine designed to produce a given amount of power and a method for improving fuel efficiency by providing an intake stream of oxygen-enriched air and keeping the amount of power output the same so that the combustion temperature in the engine is lower.

主权项

1. A method for reducing air pollutants from an internal combustion engine of the type designed for providing a given power output based upon the combustion of hydrocarbon fuel in air, the method comprising:
providing an oxygen-enriched intake air stream to an internal combustion engine, maintaining the output power at the given power output according to the design of the engine, combusting the oxygen enriched air with fuel in the engine at a temperature lower than the normal combustion temperature for the engine when burning air having ambient oxygen content so that a rate of fuel energy conversion results due to the oxygen enriched air at the lower temperature that is essentially the same rate of fuel energy conversion as would normally result from combusting the fuel with air having ambient oxygen content, wherein the amount of thermal NOx produced in exhaust gas from the engine is reduced due to the lower combustion temperature.