valvụ EGR (valvụ recirculation gas na-ekpochapụ) bụ ngwaahịa mechatronic arụnyere na injin mmanụ dizel iji chịkwaa ọnụọgụ gas na-emegharịghachi azụ na sistemụ oriri.
valvụ EGR bụ ngwaahịa mechatronic arụnyere na igwe dizel iji chịkwaa oke ikuku gas na-emegharị azụ azụ na sistemu oriri. Ọ na-adịkarị n'akụkụ aka nri nke ihe oriri na-eri nri, n'akụkụ akụkụ ahụ nke trottle, ma jikọta ya na ya site na obere ígwè tube nke na-eduga na ikpochapụ. Ọrụ ya bụ ịchịkwa ọnụ ọgụgụ nke ikuku gas na-abanye n'ime ebe a na-eri nri, nke mere na ụfọdụ gas na-ekpocha ọkụ na-abanye n'ime ihe oriri maka recirculation. valvụ EGR bụ ihe dị oke mkpa ma dị oke egwu na ngwaọrụ recirculation gas.
E kewara valvụ EGR ụzọ abụọ: ụdị igwe na ụdị njikwa eletrọnịkị.
valvụ EGR na-ebelata okpomọkụ nke ụlọ combustion site n'ịduzi gas na-ekpocha ọkụ na-esi na combustion nke engine gaa na ihe oriri na-eri nri iji sonye na combustion ahụ, na-eme ka arụ ọrụ nke engine dịkwuo mma, na-eme ka gburugburu ebe ọkụ na-ekpo ọkụ, na ibelata ibu dị na ya. injin ahụ, na-ebelata ikuku nke NO ogige nke ọma, na-ebelata ịkụ aka, na ịgbatị oge nke akụrụngwa ọ bụla. ndụ ọrụ.
Aha ahụ n'uju bụ Exhaust Gas Recirculation, ya bụ, recirculation gas recirculation [1] A na-eji usoro a belata mwepu nke nitrogen oxides (NOX) na ikuku ikuku. Nitrogen na oxygen na-emeghachi omume naanị n'okpuru okpomọkụ dị elu na ọnọdụ nrụgide dị elu, na okpomọkụ na nrụgide dị na ụlọ ọkụ nke engine na-ezute ọnọdụ ndị a, karịsịa n'oge a na-amanye osooso. Mgbe injin ahụ na-arụ ọrụ n'okpuru ibu, valvụ EGR na-emepe, na-enye ohere ka obere gas na-ekpocha ọkụ banye n'ime ihe oriri na n'ime ụlọ ọkụ yana ngwakọta ọkụ. A na-emechi valvụ EGR mgbe ọ na-adịghị arụ ọrụ, ma a na-ebugharị obere ikuku iyuzucha na injin. Gas na-ekpochapụ ụgbọala bụ gas na-adịghị agba ọkụ (na-enweghị mmanụ ọkụ na oxidant) nke na-adịghị etinye aka na combustion n'ime ụlọ combustion. Ọ na-ebelata okpomọkụ ọkụ na nrụgide site na ịmịnye akụkụ nke okpomọkụ nke ọkụ na-emepụta iji belata mmepụta nke nitrogen oxides. Ọnụ ọgụgụ nke ikuku gas na-abanye n'ime ụlọ ọkụ na-abawanye na ọsọ engine na ibu
Ntugharị gas na-ekpochapụ bụ usoro nke a na-ewebata akụkụ nke gas na-ekpochapụ n'ime ikuku ọhụrụ (ma ọ bụ ngwakọta) na-ekpo ọkụ n'oge a na-arụ ọrụ nke engine, ma laghachi na cylinder maka recirculation iji sonye na combustion. Ọrụ ya bụ ibelata ikuku NOx. NOx bụ gas na-emerụ ahụ mmadụ nke ukwuu, bụ nke a na-emepụta n'okpuru ọnọdụ okpomọkụ dị elu na ikuku oxygen. N'oge usoro ọrụ nke engine ahụ, ọ bụrụ na a na-eweghachi akụkụ nke gas na-ekpochapụ n'ime cylinder ahụ n'oge na nke kwesịrị ekwesị, n'ihi na akụkụ bụ isi nke ikuku gas nwere ikike ikpo ọkụ dịtụ ukwuu, CO2, ikuku gas nwere ike ịmịnye akụkụ. nke okpomọkụ na-emepụta site na combustion ma wepụ ya na cylinder, ma nwee mmetụta dị mma na ngwakọta. Mmetụta dilution ụfọdụ, si otú a na-ebelata okpomọkụ kachasị elu na ikuku oxygen nke combustion engine, si otú ahụ belata nhazi nke ogige NOx.
Otú ọ dị, oke ikuku gas recirculation ga-emetụta ọrụ nkịtị nke engine ahụ, karịsịa mgbe engine na-agba ọsọ na-abaghị uru, obere ọsọ na obere ibu na engine na-agba ọsọ na ọnọdụ oyi, na mgbe achọrọ ike engine na ibu zuru oke. (ụgwọ zuru oke), ikuku gas na-emegharịghachi ga-enwe mmetụta siri ike na arụmọrụ nke engine. Ya mere, ọnụ ọgụgụ nke ikuku gas na-ekere òkè na recirculation kwesịrị ka a gbanwee ya na-akpaghị aka dị ka ọnọdụ ọrụ nke engine si dị na mgbanwe na ọnọdụ ọrụ. Omume egosila na, dị ka usoro injin dị iche iche si dị, ọnụ ọgụgụ nke ikuku gas na-etinye aka na recirculation n'ozuzu dịgasị iche n'etiti 6% na 13%.
Iji mee ka ọnụ ọgụgụ nke ikuku ikuku recirculation ghara inwe mmetụta dị ukwuu na arụmọrụ engine, engines nke oge a na-achịkwa eletrik na-ejikwa usoro nchịkwa mechiri emechi maka ikuku gas na-ekpochapụ, na-etinyekwa ihe mmetụta EGR valvụ ọnọdụ na ikuku gas recirculation. valvụ (ụfọdụ ụdị na-ejikwa ihe mmetụta okpomọkụ iyuzucha gas). ma ọ bụ ihe mmetụta nrụgide), njikwa nzaghachi mgbazi mechiri emechi nke ezigbo ikuku ikuku recirculation ga-eme. Oghere njem azụmahịa. Ebe dị elu nke ala site na ala dị ala, na ọnụ ọgụgụ ojiji nke oghere ime ụlọ bụ nke kachasị elu n'etiti ngwaahịa ndị yiri ya, nke bụ 19% dị elu karịa nke ngwaahịa ndị yiri ya; nnukwu ohere.
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