{"id":48015,"date":"2019-11-07T18:20:57","date_gmt":"2019-11-07T17:20:57","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-exemplo-de-taxas-de-compressao-gasolina-x-diesel-definicao\/"},"modified":"2020-01-26T17:50:29","modified_gmt":"2020-01-26T16:50:29","slug":"o-que-e-exemplo-de-taxas-de-compressao-gasolina-x-diesel-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-exemplo-de-taxas-de-compressao-gasolina-x-diesel-definicao\/","title":{"rendered":"O que \u00e9 exemplo de taxas de compress\u00e3o &#8211; gasolina x diesel &#8211; defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">A taxa de compress\u00e3o em um motor a gasolina geralmente n\u00e3o ser\u00e1 muito maior que 10: 1 devido a uma poss\u00edvel batida no motor (autoigni\u00e7\u00e3o) e n\u00e3o menor que 6: 1.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Exemplos de taxas de compress\u00e3o &#8211; Gasolina x Diesel<\/h2>\n<ul>\n<li>A taxa de compress\u00e3o em um motor a gasolina geralmente n\u00e3o ser\u00e1 muito maior que\u00a0<strong>10: 1<\/strong>\u00a0devido a uma poss\u00edvel batida no motor (autoigni\u00e7\u00e3o) e n\u00e3o menor que\u00a0<strong>6: 1<\/strong>\u00a0.<\/li>\n<li>Um Subaru Impreza WRX turbo tem uma taxa de compress\u00e3o de\u00a0<strong>8,0: 1<\/strong>\u00a0.\u00a0Em geral, os motores turboalimentados ou sobrealimentados j\u00e1 possuem ar comprimido na entrada de ar, portanto s\u00e3o geralmente constru\u00eddos com menor taxa de compress\u00e3o.<\/li>\n<li>Um motor Honda S2000 (F22C1) tem uma taxa de compress\u00e3o de\u00a0<strong>11,1: 1<\/strong>\u00a0.<\/li>\n<li>Alguns motores de carros esportivos atmosf\u00e9ricos podem ter uma taxa de compress\u00e3o de at\u00e9\u00a0<strong>12,5: 1<\/strong>\u00a0(por exemplo, Ferrari 458 Italia).<\/li>\n<li>Em 2012, a Mazda lan\u00e7ou novos motores a gasolina sob a marca\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/SkyActiv\">SkyActiv<\/a>\u00a0com uma\u00a0taxa de compress\u00e3o de\u00a0<strong>14: 1<\/strong>\u00a0.\u00a0Para reduzir o risco de bater no motor, o g\u00e1s residual \u00e9 reduzido usando\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/4-2-1_engine_exhaust_systems\">sistemas de escape do motor 4-2-1<\/a>\u00a0, implementando uma cavidade do pist\u00e3o e otimizando a inje\u00e7\u00e3o de combust\u00edvel.<\/li>\n<li>Os motores a diesel t\u00eam uma taxa de compress\u00e3o que normalmente excede 14: 1 e taxas acima de 22: 1 tamb\u00e9m s\u00e3o comuns.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Autoigni\u00e7\u00e3o &#8211; Limite para taxa de compress\u00e3o<\/h2>\n<p>Em motores a gasolina comuns, a\u00a0<strong>taxa de compress\u00e3o<\/strong>\u00a0tem seus limites.\u00a0A taxa de compress\u00e3o em um motor a gasolina geralmente n\u00e3o ser\u00e1 muito maior que\u00a0<strong>10: 1<\/strong>\u00a0devido a uma poss\u00edvel\u00a0<strong>batida no<\/strong>\u00a0motor\u00a0(\u00a0<strong>autoigni\u00e7\u00e3o<\/strong>\u00a0) e n\u00e3o menor que\u00a0<strong>6: 1<\/strong>\u00a0.\u00a0Taxas de compress\u00e3o mais altas, no entanto, sujeitam os motores a gasolina a bater ao motor, causados \u200b\u200bpela\u00a0<strong>autoigni\u00e7\u00e3o de uma mistura n\u00e3o queimada<\/strong>\u00a0, se for usado combust\u00edvel com classifica\u00e7\u00e3o mais baixa de octanagem.\u00a0A mistura n\u00e3o queimada pode se auto-incendiar, detonando apenas da press\u00e3o e do calor, em vez de inflamar da vela de igni\u00e7\u00e3o exatamente no momento certo.\u00a0A\u00a0<strong>batida do motor<\/strong>\u00a0pode ser reduzida usando\u00a0<strong>combust\u00edvel de alta octanagem<\/strong>, o que aumenta a\u00a0<strong>resist\u00eancia<\/strong>\u00a0da gasolina\u00a0<strong>\u00e0 auto-igni\u00e7\u00e3o<\/strong>\u00a0.\u00a0Quanto maior o n\u00famero de octanas, maior a compress\u00e3o do combust\u00edvel antes de detonar (acender).\u00a0Como a temperatura atingida pela mistura combust\u00edvel-ar durante a compress\u00e3o aumenta \u00e0 medida que a taxa de compress\u00e3o aumenta, a probabilidade de auto-igni\u00e7\u00e3o aumenta com a taxa de compress\u00e3o.\u00a0A autoigni\u00e7\u00e3o pode reduzir a efici\u00eancia ou danificar o motor se n\u00e3o houver sensores de batida para modificar o tempo de igni\u00e7\u00e3o.<\/p>\n<p>Taxas de compress\u00e3o mais altas podem ser alcan\u00e7adas em\u00a0<strong>motores a diesel<\/strong>\u00a0(tamb\u00e9m chamados de\u00a0<strong>motores de igni\u00e7\u00e3o por compress\u00e3o<\/strong>\u00a0), porque eles n\u00e3o comprimem o combust\u00edvel, mas comprimem apenas o ar e injetam combust\u00edvel no ar que foi aquecido por compress\u00e3o.\u00a0As taxas de compress\u00e3o na faixa de 12 a 20 s\u00e3o t\u00edpicas para motores a diesel.\u00a0A maior expans\u00e3o nos motores diesel significa que eles rejeitam menos calor em seus escapamentos mais frios.\u00a0A maior taxa de compress\u00e3o (maior expans\u00e3o) e a temperatura de pico mais alta fazem com que os motores a diesel atinjam maior efici\u00eancia t\u00e9rmica.<\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-accordion\">\n<div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-arrow\" data-anchor=\"References\">\n<div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><\/div>\n<\/div>\n<\/div>\n<div tabindex=\"0\" role=\"button\">\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A taxa de compress\u00e3o em um motor a gasolina geralmente n\u00e3o ser\u00e1 muito maior que 10: 1 devido a uma poss\u00edvel batida no motor (autoigni\u00e7\u00e3o) e n\u00e3o menor que 6: 1.\u00a0Engenharia T\u00e9rmica Exemplos de taxas de compress\u00e3o &#8211; Gasolina x Diesel A taxa de compress\u00e3o em um motor a gasolina geralmente n\u00e3o ser\u00e1 muito maior &#8230; <a title=\"O que \u00e9 exemplo de taxas de compress\u00e3o &#8211; gasolina x diesel &#8211; defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-exemplo-de-taxas-de-compressao-gasolina-x-diesel-definicao\/\" aria-label=\"More on O que \u00e9 exemplo de taxas de compress\u00e3o &#8211; gasolina x diesel &#8211; defini\u00e7\u00e3o\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>O que \u00e9 exemplo de taxas de compress\u00e3o - gasolina x diesel - defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A taxa de compress\u00e3o em um motor a gasolina geralmente n\u00e3o ser\u00e1 muito maior que 10: 1 devido a uma poss\u00edvel batida no motor (autoigni\u00e7\u00e3o) e n\u00e3o menor que 6: 1. 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