{"id":13990,"date":"2025-03-13T19:59:18","date_gmt":"2025-03-13T16:59:18","guid":{"rendered":"https:\/\/diagnozabam.ro\/sfaturi\/?p=13990"},"modified":"2025-04-02T14:55:26","modified_gmt":"2025-04-02T11:55:26","slug":"sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare","status":"publish","type":"post","link":"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare\/","title":{"rendered":"Sistemul de aer secundar: Func\u021bionare, Defec\u021biuni \u0219i Diagnosticare"},"content":{"rendered":"<h1>Sistemul de aer secundar: Func\u021bionare, Defec\u021biuni \u0219i Diagnosticare<\/h1>\n<h4 data-start=\"78\" data-end=\"142\"><img decoding=\"async\" class=\"size-full wp-image-13991 aligncenter\" src=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/00-23-png.webp\" alt=\"Sistemul de aer secundar: Func\u021bionare, Defec\u021biuni \u0219i Diagnosticare - 00 23 png\" width=\"2482\" height=\"1353\" title=\"Sistemul de aer secundar: Func\u021bionare, Defec\u021biuni \u0219i Diagnosticare - 00 23 png\"><\/h4>\n<h4 data-start=\"78\" data-end=\"142\"><strong data-start=\"83\" data-end=\"140\">Ce este sistemul de aer secundar \u0219i cum func\u021bioneaz\u0103?<\/strong><\/h4>\n<p data-start=\"143\" data-end=\"519\">Sistemul de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar are rolul de a reduce emisiile nocive \u00een faza de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/greseli-frecvente-iarna-la-pornirea-masinii-lista-critica\/\">pornire<\/a> la <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/greseli-frecvente-iarna-la-pornirea-masinii-lista-critica\/\">rece<\/a>, c\u00e2nd convertizorul catalitic nu a atins \u00eenc\u0103 temperatura optim\u0103 de func\u021bionare. \u00cen aceast\u0103 etap\u0103, nivelul de hidrocarburi (HC) \u0219i monoxid de carbon (CO) din gazele de evacuare este ridicat, iar pentru a accelera arderea acestora, se introduce <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> suplimentar \u00een sistemul de evacuare.<\/p>\n<p data-start=\"521\" data-end=\"999\">Motoarele pe benzin\u0103 cu func\u021bionare stoichiometric\u0103 \u0219i convertizor catalitic cu trei c\u0103i pot ob\u021bine o rat\u0103 de conversie de peste 90% pentru emisiile nocive. \u00cens\u0103, deoarece catalizatorul \u00eencepe s\u0103 func\u021bioneze eficient doar la temperaturi de 300\u00b0C \u2013 350\u00b0C, este necesar\u0103 o solu\u021bie temporar\u0103 pentru a reduce poluarea. Aici intervine sistemul de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar, care adaug\u0103 oxigen suplimentar \u00een gazele de evacuare, facilit\u00e2nd post-combustia \u0219i transformarea HC \u0219i CO \u00een CO\u2082 \u0219i H\u2082O.<\/p>\n<p data-start=\"1001\" data-end=\"1049\">Exist\u0103 dou\u0103 tipuri de sisteme de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar:<\/p>\n<ol data-start=\"1050\" data-end=\"1275\">\n<li data-start=\"1050\" data-end=\"1148\"><strong data-start=\"1053\" data-end=\"1062\">Pasiv<\/strong> \u2013 utilizeaz\u0103 fluctua\u021biile de presiune din evacuare pentru a aspira <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> suplimentar.<\/li>\n<li data-start=\"1149\" data-end=\"1275\"><strong data-start=\"1152\" data-end=\"1161\">Activ<\/strong> \u2013 utilizeaz\u0103 o pomp\u0103 electric\u0103 pentru a injecta <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> \u00een evacuare, permi\u021b\u00e2nd un control mai precis al procesului.<\/li>\n<\/ol>\n<p data-start=\"1277\" data-end=\"1483\">\u00cen cazul vehiculelor cu convertizor catalitic cu trei c\u0103i \u0219i sond\u0103 lambda, sistemul de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar este oprit automat dup\u0103 aproximativ 100 de secunde, odat\u0103 ce catalizatorul ajunge la temperatura optim\u0103.<\/p>\n<hr data-start=\"1485\" data-end=\"1490\">\n<h4 data-start=\"1492\" data-end=\"1542\"><strong data-start=\"1497\" data-end=\"1540\">Componentele sistemului de aer secundar<\/strong><\/h4>\n<p data-start=\"1543\" data-end=\"1616\">Sistemul de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar activ include urm\u0103toarele elemente principale:<\/p>\n<ul data-start=\"1617\" data-end=\"2003\">\n<li data-start=\"1617\" data-end=\"1688\"><strong data-start=\"1619\" data-end=\"1644\">Pomp\u0103 de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar<\/strong> \u2013 furnizeaz\u0103 <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> suplimentar \u00een evacuare.<\/li>\n<li data-start=\"1689\" data-end=\"1755\"><strong data-start=\"1691\" data-end=\"1711\">Releu de comand\u0103<\/strong> \u2013 controleaz\u0103 pornirea \u0219i oprirea pompei.<\/li>\n<li data-start=\"1756\" data-end=\"1808\"><strong data-start=\"1758\" data-end=\"1780\">Supap\u0103 de comutare<\/strong> \u2013 regleaz\u0103 fluxul de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a>.<\/li>\n<li data-start=\"1809\" data-end=\"1895\"><strong data-start=\"1811\" data-end=\"1831\">Supap\u0103 combinat\u0103<\/strong> \u2013 \u00eempiedic\u0103 gazele fierbin\u021bi din evacuare s\u0103 ajung\u0103 la pomp\u0103.<\/li>\n<li data-start=\"1896\" data-end=\"2003\"><strong data-start=\"1898\" data-end=\"1939\">Unitatea de comand\u0103 a motorului (ECU)<\/strong> \u2013 gestioneaz\u0103 \u00eentregul sistem pe baza parametrilor motorului.<\/li>\n<\/ul>\n<p data-start=\"2005\" data-end=\"2263\">\u00cen timpul func\u021bion\u0103rii, ECU activeaz\u0103 pompa electric\u0103 prin releul de comand\u0103. Supapa de control se deschide, permi\u021b\u00e2nd aerului pompat s\u0103 ajung\u0103 \u00een evacuare. Dup\u0103 ce senzorul lambda detecteaz\u0103 c\u0103 motorul a atins temperatura optim\u0103, sistemul este dezactivat.<\/p>\n<hr data-start=\"2265\" data-end=\"2270\">\n<h4 data-start=\"2272\" data-end=\"2337\"><strong data-start=\"2277\" data-end=\"2335\">Simptomele unei defec\u021biuni la sistemul de aer secundar<\/strong><\/h4>\n<p data-start=\"2338\" data-end=\"2488\">Problemele acestui sistem pot duce la cre\u0219terea emisiilor \u0219i la aprinderea martorului &#8222;Check Engine&#8221;. Semnele principale ale unei defec\u021biuni includ:<\/p>\n<ul data-start=\"2489\" data-end=\"2700\">\n<li data-start=\"2489\" data-end=\"2548\">Emisii ridicate de HC \u0219i CO \u00een faza de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/greseli-frecvente-iarna-la-pornirea-masinii-lista-critica\/\">pornire<\/a> la <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/greseli-frecvente-iarna-la-pornirea-masinii-lista-critica\/\">rece<\/a>.<\/li>\n<li data-start=\"2549\" data-end=\"2594\">Func\u021bionare \u00eent\u00e2rziat\u0103 a catalizatorului.<\/li>\n<li data-start=\"2595\" data-end=\"2663\">Sunete neobi\u0219nuite sau lipsa zgomotului de func\u021bionare a pompei.<\/li>\n<li data-start=\"2664\" data-end=\"2700\">Coduri de eroare stocate \u00een ECU.<\/li>\n<\/ul>\n<hr data-start=\"2702\" data-end=\"2707\">\n<h4 data-start=\"2709\" data-end=\"2768\"><strong data-start=\"2714\" data-end=\"2766\">Cauzele defec\u021biunilor \u0219i metode de diagnosticare<\/strong><\/h4>\n<p data-start=\"2769\" data-end=\"2804\">Cele mai frecvente probleme sunt:<\/p>\n<ul data-start=\"2805\" data-end=\"3065\">\n<li data-start=\"2805\" data-end=\"2892\"><strong data-start=\"2807\" data-end=\"2831\">Pomp\u0103 de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> defect\u0103<\/strong> \u2013 provocat\u0103 de intrarea umezelii \u0219i blocarea mecanismului.<\/li>\n<li data-start=\"2893\" data-end=\"2981\"><strong data-start=\"2895\" data-end=\"2927\">Alimentare electric\u0103 defect\u0103<\/strong> \u2013 fire \u00eentrerupte, releu <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">defect<\/a> sau siguran\u021be arse.<\/li>\n<li data-start=\"2982\" data-end=\"3065\"><strong data-start=\"2984\" data-end=\"3018\">Supape blocate sau deteriorate<\/strong> \u2013 pot \u00eempiedica circula\u021bia aerului secundar.<\/li>\n<\/ul>\n<p data-start=\"3067\" data-end=\"3127\">Pentru a identifica problema, se recomand\u0103 urm\u0103torii pa\u0219i:<\/p>\n<ol data-start=\"3129\" data-end=\"4105\">\n<li data-start=\"3129\" data-end=\"3288\"><strong data-start=\"3132\" data-end=\"3166\">Verificare vizual\u0103 \u0219i acustic\u0103<\/strong> \u2013 Asculta\u021bi dac\u0103 pompa func\u021bioneaz\u0103 la <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/greseli-frecvente-iarna-la-pornirea-masinii-lista-critica\/\">pornire<\/a> \u0219i verifica\u021bi starea cablajului, furtunurilor \u0219i componentelor mecanice.<\/li>\n<li data-start=\"3289\" data-end=\"3432\"><strong data-start=\"3292\" data-end=\"3341\">Citirea codurilor de eroare cu un tester OBD2<\/strong> \u2013 Orice eroare legat\u0103 de sistemul de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar poate fi identificat\u0103 \u0219i interpretat\u0103.<\/li>\n<li data-start=\"3433\" data-end=\"3577\"><strong data-start=\"3436\" data-end=\"3468\">Testarea func\u021bion\u0103rii pompei<\/strong> \u2013 Dac\u0103 \u00een memoria ECU nu exist\u0103 erori, pompa poate fi activat\u0103 manual folosind un tester de diagnosticare.<\/li>\n<li data-start=\"3578\" data-end=\"3732\"><strong data-start=\"3581\" data-end=\"3628\">Verificarea vacuumului la supapa de control<\/strong> \u2013 La pornirea pompei, trebuie s\u0103 existe un vacuum detectabil. Dac\u0103 lipse\u0219te, supapa poate fi defect\u0103.<\/li>\n<li data-start=\"3733\" data-end=\"3851\"><strong data-start=\"3736\" data-end=\"3763\">Testarea cu multimetrul<\/strong> \u2013 Se poate verifica declan\u0219area supapei de control \u0219i alimentarea electric\u0103 a pompei.<\/li>\n<li data-start=\"3852\" data-end=\"3964\"><strong data-start=\"3855\" data-end=\"3903\">Testarea supapei combinate cu o pomp\u0103 de vid<\/strong> \u2013 Se verific\u0103 deschiderea \u0219i \u00eenchiderea corect\u0103 a supapei.<\/li>\n<li data-start=\"3965\" data-end=\"4105\"><strong data-start=\"3968\" data-end=\"3996\">Verificarea furtunurilor<\/strong> \u2013 Se sufl\u0103 <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> u\u0219or prin furtunul dintre pomp\u0103 \u0219i supapa combinat\u0103 pentru a vedea dac\u0103 supapa se deschide.<\/li>\n<\/ol>\n<hr data-start=\"4107\" data-end=\"4112\">\n<h4 data-start=\"4114\" data-end=\"4134\"><strong data-start=\"4119\" data-end=\"4132\">Concluzie<\/strong><\/h4>\n<p data-start=\"4135\" data-end=\"4483\">Sistemul de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/%e2%9a%99%ef%b8%8f-debitmetru-aer-defect-simptome-cauze-si-solutii\/\">aer<\/a> secundar joac\u0103 un rol important \u00een reducerea emisiilor \u00een faza de <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/greseli-frecvente-iarna-la-pornirea-masinii-lista-critica\/\">pornire<\/a> la <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/greseli-frecvente-iarna-la-pornirea-masinii-lista-critica\/\">rece<\/a>. Problemele acestui sistem pot cre\u0219te poluarea \u0219i pot afecta performan\u021ba catalizatorului. Diagnosticul rapid, folosind verific\u0103ri acustice, vizuale \u0219i unelte de diagnoz\u0103 OBD2, poate preveni repara\u021bii costisitoare \u0219i defec\u021biuni majore ale motorului.<\/p>\n<p data-start=\"4485\" data-end=\"4571\" data-is-last-node=\"\" data-is-only-node=\"\">Ai nevoie de informa\u021bii suplimentare despre testarea unui anumit model de ma\u0219in\u0103? \ud83d\ude97\ud83d\udca8<\/p>\n<p data-start=\"4485\" data-end=\"4571\" data-is-last-node=\"\" data-is-only-node=\"\"><a href=\"https:\/\/autotehnica.com\/sistemul-de-injectie-secundara-a-aerului\/\">Surs\u0103\u00a0<\/a><\/p>\n<div id='gallery-1' class='gallery galleryid-13990 gallery-columns-3 gallery-size-full'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a title=\"01 25\"  href='https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare\/01-25\/'><img decoding=\"async\" width=\"809\" height=\"741\" src=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/01-25.webp\" class=\"attachment-full size-full\" alt=\"01 25\" aria-describedby=\"gallery-1-13992\" srcset=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/01-25.webp 809w, https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/01-25-768x703.webp 768w\" sizes=\"(max-width: 809px) 100vw, 809px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-13992'>\n\t\t\t\t01 25\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a title=\"002 1024&#215;674 1\"  href='https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare\/002-1024x674\/'><img decoding=\"async\" width=\"1024\" height=\"674\" src=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/002-1024x674-1.webp\" class=\"attachment-full size-full\" alt=\"002 1024x674 1\" aria-describedby=\"gallery-1-13993\" srcset=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/002-1024x674-1.webp 1024w, https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/002-1024x674-1-768x506.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-13993'>\n\t\t\t\t002 1024&#215;674 1\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a title=\"004 1 1024&#215;674 1\"  href='https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare\/004-1-1024x674\/'><img decoding=\"async\" width=\"1024\" height=\"674\" src=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/004-1-1024x674-1.webp\" class=\"attachment-full size-full\" alt=\"004 1 1024x674 1\" aria-describedby=\"gallery-1-13994\" srcset=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/004-1-1024x674-1.webp 1024w, https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/004-1-1024x674-1-768x506.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-13994'>\n\t\t\t\t004 1 1024&#215;674 1\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a title=\"006 600&#215;347 1\"  href='https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare\/006-600x347\/'><img decoding=\"async\" width=\"600\" height=\"347\" src=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/006-600x347-1.webp\" class=\"attachment-full size-full\" alt=\"006 600x347 1\" aria-describedby=\"gallery-1-13995\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-13995'>\n\t\t\t\t006 600&#215;347 1\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a title=\"007 600&#215;303 1\"  href='https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare\/007-600x303\/'><img decoding=\"async\" width=\"600\" height=\"303\" src=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/03\/007-600x303-1.webp\" class=\"attachment-full size-full\" alt=\"007 600x303 1\" aria-describedby=\"gallery-1-13996\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-13996'>\n\t\t\t\t007 600&#215;303 1\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a title=\"008 600&#215;303 1\"  href='https:\/\/diagnozabam.ro\/sfaturi\/ro\/blog\/sistemul-de-aer-secundar-functionare-defectiuni-si-diagnosticare\/008-600x303\/'><img 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id='gallery-1-13998'>\n\t\t\t\t009 600&#215;304 1\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Sistemul de aer secundar: Func\u021bionare, Defec\u021biuni \u0219i Diagnosticare Ce este sistemul de aer secundar \u0219i cum func\u021bioneaz\u0103? 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