Urea injection control method and device
The invention provides a urea injection control method and device which are applied to a two-stage SCR aftertreatment system.The method comprises the steps that the first temperature mean value of a preceding-stage SCR, the second temperature mean value of a backward-stage SCR, the first nitrogen ox...
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| creator | ZHANG CHEN LI JUNQI CHEN YAQI LUAN JUNSHAN |
| description | The invention provides a urea injection control method and device which are applied to a two-stage SCR aftertreatment system.The method comprises the steps that the first temperature mean value of a preceding-stage SCR, the second temperature mean value of a backward-stage SCR, the first nitrogen oxide measured value of the upstream of the preceding-stage SCR, the second nitrogen oxide measured value of the downstream of the preceding-stage SCR, the exhaust flow and the measured ammonia reserve of the backward-stage SCR are obtained; according to parameters such as a target mode started by the engine, the first temperature mean value and the second temperature mean value, the first set urea injection amount of the preceding-stage SCR is determined; according to parameters such as the exhaust flow and a second nitrogen oxide measured value, the second set urea injection amount of the post-stage SCR is determined; the first set urea injection amount is used for controlling the urea nozzle of the preceding-stage |
| format | Patent |
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according to parameters such as a target mode started by the engine, the first temperature mean value and the second temperature mean value, the first set urea injection amount of the preceding-stage SCR is determined; according to parameters such as the exhaust flow and a second nitrogen oxide measured value, the second set urea injection amount of the post-stage SCR is determined; the first set urea injection amount is used for controlling the urea nozzle of the preceding-stage</description><language>chi ; eng</language><subject>BLASTING ; ENGINE PLANTS IN GENERAL ; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES ; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL ; HEATING ; LIGHTING ; MACHINES OR ENGINES IN GENERAL ; MECHANICAL ENGINEERING ; STEAM ENGINES ; WEAPONS</subject><creationdate>2024</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240924&DB=EPODOC&CC=CN&NR=118686686A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25555,76308</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240924&DB=EPODOC&CC=CN&NR=118686686A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ZHANG CHEN</creatorcontrib><creatorcontrib>LI JUNQI</creatorcontrib><creatorcontrib>CHEN YAQI</creatorcontrib><creatorcontrib>LUAN JUNSHAN</creatorcontrib><title>Urea injection control method and device</title><description>The invention provides a urea injection control method and device which are applied to a two-stage SCR aftertreatment system.The method comprises the steps that the first temperature mean value of a preceding-stage SCR, the second temperature mean value of a backward-stage SCR, the first nitrogen oxide measured value of the upstream of the preceding-stage SCR, the second nitrogen oxide measured value of the downstream of the preceding-stage SCR, the exhaust flow and the measured ammonia reserve of the backward-stage SCR are obtained; 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according to parameters such as a target mode started by the engine, the first temperature mean value and the second temperature mean value, the first set urea injection amount of the preceding-stage SCR is determined; according to parameters such as the exhaust flow and a second nitrogen oxide measured value, the second set urea injection amount of the post-stage SCR is determined; the first set urea injection amount is used for controlling the urea nozzle of the preceding-stage</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS |
| title | Urea injection control method and device |
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