| 摘要 |
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. Catalyst for adsorption of nitrogen oxides NOis configured to adsorb nitrogen oxides NOfrom exhaust gas, when air-to-fuel ratio of exhaust gas, incoming to catalyst for adsorption of nitrogen oxides NO, is in depleted range. Catalyst for adsorption of nitrogen oxides NOis configured to release adsorbed nitrogen oxides NO, when air-to-fuel ratio of exhaust gas incoming, to catalyst for adsorption of nitrogen oxides NO, 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 NOreleases adsorbed nitrogen oxides NO; 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 NOreleases adsorbed nitrogen oxides NO, wherein second specified interval is shorter than first specified interval.EFFECT: technical result is assurance of high degree of purification from nitrogen oxides NO, and reduction of fuel consumption.12 cl, 23 dwg |
