DEVICE FOR CONTROL OF EXHAUST GASES IN INTERNAL COMBUSTION ENGINE Russian patent published in 2016 - IPC F01N3/08 F01N3/28 F02D41/04 B01D53/92 

FIELD: engines.

SUBSTANCE: invention relates to device for control of exhaust gases in internal combustion engine. Internal combustion engine includes exhaust channel. Exhaust channel includes three-component catalyst, and catalyst for adsorption of nitrogen oxides NO_x. Catalyst for adsorption of nitrogen oxides NO_x is configured to adsorb nitrogen oxides NO_x from exhaust gas, when air-to-fuel ratio of exhaust gas, incoming to catalyst for adsorption of nitrogen oxides NO_x, is in depleted range. Catalyst for adsorption of nitrogen oxides NO_x is configured to release adsorbed nitrogen oxides NO_x, when air-to-fuel ratio of exhaust gas incoming, to catalyst for adsorption of nitrogen oxides NO_x, is converted to enriched range. Device for control of exhaust gases contains: electronic control unit configured to control combustion in combustion chamber of internal combustion engine at first basic air-to-fuel ratio, when internal combustion engine operates in specified working area of low engine load, wherein first basic air-fuel ratio is depleted air-to-fuel ratio; said electronic control unit configured to shift combustion in combustion chamber into range of rich air-to-fuel ratio with first preset interval, when internal combustion engine operates in specified working area of low engine load, and catalyst for adsorption of nitrogen oxides NO_x releases adsorbed nitrogen oxides NO_x; said electronic control unit configured to shift combustion in combustion chamber to theoretical air-to-fuel ratio using feedback, when internal combustion engine operates in preset working region of high engine load; said electronic control unit configured to control combustion in combustion chamber at second basic air-to-fuel ratio when internal combustion engine operates in specified working area of average engine load, wherein second basic air-to-fuel ratio is lower than first basic air-to-fuel ratio, wherein specified working area of average engine load is set between specified working area of low engine load and specified working area of high engine load; and said electronic control unit configured to shift combustion in combustion chamber into range of rich air-to-fuel ratio with second specified interval, when internal combustion engine operates in specified working area of average engine load, and catalyst for adsorption of nitrogen oxides NO_x releases adsorbed nitrogen oxides NO_x, wherein second specified interval is shorter than first specified interval.

EFFECT: technical result is assurance of high degree of purification from nitrogen oxides NO_x, and reduction of fuel consumption.

12 cl, 23 dwg