{"id":18748,"date":"2024-12-06T17:03:39","date_gmt":"2024-12-06T20:03:39","guid":{"rendered":"https:\/\/hangarmma.com.br\/blog\/?post_type=glossary&#038;p=18748"},"modified":"2024-12-06T17:26:37","modified_gmt":"2024-12-06T20:26:37","slug":"atraso-no-fechamento-da-admissao","status":"publish","type":"glossary","link":"https:\/\/hangarmma.com.br\/blog\/atraso-no-fechamento-da-admissao\/","title":{"rendered":"Atraso no Fechamento da Admiss\u00e3o"},"content":{"rendered":"<p class=\"wp-block-paragraph\">O <strong>Atraso no Fechamento da Admiss&#xE3;o (AtFA)<\/strong> &#xE9; uma estrat&#xE9;gia utilizada no projeto de motores para melhorar o enchimento dos cilindros, otimizando a efici&#xEA;ncia volum&#xE9;trica. Esse atraso consiste em manter a <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_15d2886de985b862afe4246008aa849e\" data-link=\"https:\/\/hangarmma.com.br\/blog\/valvula\/\" href=\"https:\/\/hangarmma.com.br\/blog\/valvula\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">v&#xE1;lvula<\/a> de admiss&#xE3;o aberta mesmo ap&#xF3;s o pist&#xE3;o atingir o <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_2d06ca3ab2cff0013337c290446dccf0\" data-link=\"https:\/\/hangarmma.com.br\/blog\/ponto-morto-inferior-bdc\/\" href=\"https:\/\/hangarmma.com.br\/blog\/ponto-morto-inferior-bdc\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">ponto morto inferior<\/a> (PMI), aproveitando a <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_402b7c1dc29f6bb932f6f3ec411534f3\" data-link=\"https:\/\/hangarmma.com.br\/blog\/inercia\/\" href=\"https:\/\/hangarmma.com.br\/blog\/inercia\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">in&#xE9;rcia<\/a> da <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_0eaef053552d3f8e0da601d521f763ae\" data-link=\"https:\/\/hangarmma.com.br\/blog\/mistura-ar-combustivel\/\" href=\"https:\/\/hangarmma.com.br\/blog\/mistura-ar-combustivel\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">mistura ar-combust&#xED;vel<\/a> que continua fluindo para dentro do cilindro.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Prop&#xF3;sito do AtFA:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Aproveitar a <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_402b7c1dc29f6bb932f6f3ec411534f3\" data-link=\"https:\/\/hangarmma.com.br\/blog\/inercia\/\" href=\"https:\/\/hangarmma.com.br\/blog\/inercia\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">in&#xE9;rcia<\/a> da mistura<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Quando o pist&#xE3;o come&#xE7;a a subir ap&#xF3;s o PMI, a <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_b538845fda1d032e858fa6b8d5d0879c\" data-link=\"https:\/\/hangarmma.com.br\/blog\/velocidade\/\" href=\"https:\/\/hangarmma.com.br\/blog\/velocidade\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">velocidade<\/a> dos gases na tubula&#xE7;&#xE3;o ainda &#xE9; suficiente para for&#xE7;ar mais mistura para dentro do cilindro, aumentando a <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_f687b58ee84d728a11d1ef43bc0fd1fd\" data-link=\"https:\/\/hangarmma.com.br\/blog\/densidade\/\" href=\"https:\/\/hangarmma.com.br\/blog\/densidade\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">densidade<\/a> da <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_3ba56f55307adc68e1841f4c2f95f8f8\"  data-link=\"https:\/\/hangarmma.com.br\/blog\/carga\/\"  href=\"https:\/\/hangarmma.com.br\/blog\/carga\/\"  target=\"_blank\"  data-mobile-support=\"0\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>carga<\/a>.<\/li>\n\n\n\n<li>Esse fen&#xF4;meno &#xE9; especialmente &#xFA;til em motores que operam em altas rota&#xE7;&#xF5;es, onde o fluxo de gases &#xE9; mais significativo.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Maximizar a efici&#xEA;ncia volum&#xE9;trica<\/strong>:\n<ul class=\"wp-block-list\">\n<li>O AtFA permite um melhor preenchimento do cilindro, o que resulta em maior <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_555b5d38d6960552ca65f98e44b9c9b6\" data-link=\"https:\/\/hangarmma.com.br\/blog\/potencia\/\" href=\"https:\/\/hangarmma.com.br\/blog\/potencia\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">pot&#xEA;ncia<\/a> por <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"cmtt_f4eaf674539570d669b78febcafe6e29\"  data-link=\"https:\/\/hangarmma.com.br\/blog\/ciclo\/\"  href=\"https:\/\/hangarmma.com.br\/blog\/ciclo\/\"  target=\"_blank\"  data-mobile-support=\"0\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex='0' role='link'>ciclo<\/a>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Ajustes e Exemplos:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No exemplo citado, o AtFA &#xE9; de <strong>50 graus ap&#xF3;s o PMI<\/strong>, mas pode variar dependendo das caracter&#xED;sticas do motor, como sua aplica&#xE7;&#xE3;o (alto desempenho, economia de combust&#xED;vel ou uso em baixa rota&#xE7;&#xE3;o).<\/li>\n\n\n\n<li>Motores projetados para operar em altas rota&#xE7;&#xF5;es tendem a ter um AtFA mais longo para aproveitar melhor o fluxo inercial.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Considera&#xE7;&#xF5;es:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Embora o AtFA traga benef&#xED;cios em altas rota&#xE7;&#xF5;es, em baixas rota&#xE7;&#xF5;es pode causar perda de efici&#xEA;ncia devido ao poss&#xED;vel retorno da mistura para o <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"cmtt_f7266e8873dad7c8ceba23b3fc0a2fd7\" data-link=\"https:\/\/hangarmma.com.br\/blog\/coletor\/\" href=\"https:\/\/hangarmma.com.br\/blog\/coletor\/\" target=\"_blank\" data-mobile-support=\"0\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">coletor<\/a> de admiss&#xE3;o (chamado de &#x201C;revers&#xE3;o de fluxo&#x201D;).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O Atraso no Fechamento da Admiss\u00e3o (AtFA) \u00e9 uma estrat\u00e9gia utilizada no projeto de motores para melhorar o enchimento dos cilindros, otimizando a efici\u00eancia volum\u00e9trica. Esse atraso consiste em manter a v\u00e1lvula de admiss\u00e3o aberta mesmo ap\u00f3s o pist\u00e3o atingir o ponto morto inferior (PMI), aproveitando a in\u00e9rcia da mistura ar-combust\u00edvel que continua fluindo para [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"glossary-categories":[],"glossary-tags":[],"class_list":["post-18748","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Atraso no Fechamento da Admiss\u00e3o - HANGAR MMA<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hangarmma.com.br\/blog\/atraso-no-fechamento-da-admissao\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Atraso no Fechamento da Admiss\u00e3o - HANGAR MMA\" \/>\n<meta property=\"og:description\" content=\"O Atraso no Fechamento da Admiss\u00e3o (AtFA) \u00e9 uma estrat\u00e9gia utilizada no projeto de motores para melhorar o enchimento dos cilindros, otimizando a efici\u00eancia volum\u00e9trica. 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