METHOD FOR REDUCTION OF NOX-EMISSION AT INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE APPROPRIATE FOR THIS METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a method for reducing the NOSBX/SBemission in an internal combustion engine and an internal combustion engine appropriate for the same. PSOLUTION: This method reduces the NOSBX/SBemission by recirculating a part of the combustion product generated in operation cycles and re-supplying it to a working room 2 for a combustion process after that in at least one of the internal combustion engine having the working room 2 partitioned by a piston 3 which supplies fuel and air by the operation cycles so as to discharge the combustion product. In the method, the combustion product not diluted by the air and used for recirculation is removed for each cycle from the working room 2 before new gas is supplied for the next combustion process, and removing of the recirculated combustion product is started before start of exhaust emission, and is completed between start of the exhaust emission and start of fresh air supply. PCOPYRIGHT: (C)2010,JPO&INPIT