{"id":53168,"date":"2025-01-27T13:06:17","date_gmt":"2025-01-27T12:06:17","guid":{"rendered":"https:\/\/grupoalava.rearmachine.com\/preditec\/servicios\/manutencao-preditiva\/motores-alternativos\/"},"modified":"2026-06-08T16:15:27","modified_gmt":"2026-06-08T14:15:27","slug":"motores-alternativos","status":"publish","type":"servicios-preditec","link":"https:\/\/grupoalava.rearmachine.com\/pt\/preditec\/servicios\/manutencao-preditiva\/motores-alternativos\/","title":{"rendered":"Motores alternativos"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-background-color:#f8fafd;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-stretch fusion-flex-content-wrap\" style=\"max-width:calc( 1250px + 30px );margin-left: calc(-30px \/ 2 );margin-right: calc(-30px \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-padding-right:24px;--awb-padding-left:34px;--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:0px;--awb-margin-bottom-large:20px;--awb-spacing-left-large:0px;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:0px;--awb-spacing-left-medium:0px;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:15px;--awb-spacing-left-small:15px;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;--awb-font-size:28px;\"><h2 class=\"fusion-title-heading title-heading-left fusion-responsive-typography-calculated\" style=\"font-family:&quot;Roboto&quot;;font-style:normal;font-weight:300;margin:0;font-size:1em;--fontSize:28;line-height:1.14;\">Servi\u00e7o integral de medi\u00e7\u00f5es e diagn\u00f3sticos preditivos em motores alternativos &#8211; PRE-7019<\/h2><\/div><div class=\"fusion-text fusion-text-1\"><p>A manuten\u00e7\u00e3o preditiva de motores de combust\u00e3o interna e de combust\u00e3o interna baseia-se no processamento multicanal de sinais de press\u00e3o no cilindro, vibra\u00e7\u00f5es de alta e baixa frequ\u00eancia, ultra-sons, temperatura e tens\u00f5es de igni\u00e7\u00e3o.<\/p>\n<p>A sincroniza\u00e7\u00e3o das medi\u00e7\u00f5es \u00e9 efectuada com um codificador ou tac\u00f3metro, que serve de refer\u00eancia \u00e0 posi\u00e7\u00e3o do pist\u00e3o, tanto nos motores diesel de igni\u00e7\u00e3o por compress\u00e3o como nos motores GAS de igni\u00e7\u00e3o por fa\u00edsca.<\/p>\n<p>A partir da curva P-V fechada, calcula-se a pot\u00eancia indicada ou termodin\u00e2mica de cada cilindro do motor (IHP) e tamb\u00e9m se pode estabelecer a condi\u00e7\u00e3o de equil\u00edbrio nas press\u00f5es de pico de disparo (PFP).<\/p>\n<p>A partir da curva de press\u00e3o aberta, \u00e9 poss\u00edvel detetar a correla\u00e7\u00e3o com as outras vari\u00e1veis mec\u00e2nicas:<\/p>\n<ul>\n<li>Inje\u00e7\u00e3o de combust\u00edvel fraca<\/li>\n<li>V\u00e1lvulas e an\u00e9is com fugas<\/li>\n<li>Desgaste dos componentes da linha de tra\u00e7\u00e3o das v\u00e1lvulas<\/li>\n<li>Desgaste e riscos nas camisas<\/li>\n<li>Folgas nos casquilhos da biela<\/li>\n<li>Danos na chumaceira da cambota<\/li>\n<li>Problemas com o turbocompressor<\/li>\n<li>Problemas com a bomba de \u00e1gua e de \u00f3leo<\/li>\n<li>Vibra\u00e7\u00f5es estruturais em placas e funda\u00e7\u00f5es<\/li>\n<li>Defeitos nas velas de igni\u00e7\u00e3o e nos seus circuitos de igni\u00e7\u00e3o prim\u00e1rios ou secund\u00e1rios<\/li>\n<\/ul>\n<p>O diagn\u00f3stico preditivo do estado funcional e mec\u00e2nico de um motor de combust\u00e3o interna baseia-se na an\u00e1lise da curva de press\u00e3o no cilindro (P-V ), de acordo com o seguinte procedimento:<\/p>\n<ul>\n<li>Medi\u00e7\u00e3o da press\u00e3o do cilindro, sincronizada com a posi\u00e7\u00e3o da cambota atrav\u00e9s de um codificador ou de um tac\u00f3metro de refer\u00eancia em ponto morto<\/li>\n<li>Medi\u00e7\u00e3o de vari\u00e1veis mec\u00e2nicas sincronizadas no padr\u00e3o de press\u00e3o (vibra\u00e7\u00e3o, ultra-sons, temperatura).<\/li>\n<li>C\u00e1lculo experimental da pot\u00eancia indicada (IHP) com avalia\u00e7\u00e3o estat\u00edstica da dispers\u00e3o e do desequil\u00edbrio das press\u00f5es de disparo (PFP), e an\u00e1lise da tens\u00e3o da biela por composi\u00e7\u00e3o da carga est\u00e1tica experimental (press\u00e3o) e da carga din\u00e2mica te\u00f3rica (in\u00e9rcia do trem alternativo).<\/li>\n<li>Identifica\u00e7\u00e3o de problemas de combust\u00e3o e igni\u00e7\u00e3o, regula\u00e7\u00e3o din\u00e2mica das v\u00e1lvulas e impactos mec\u00e2nicos do trem alternativo e dos suportes da placa de base.<\/li>\n<li>Relat\u00f3rio do estado funcional e mec\u00e2nico com recomenda\u00e7\u00f5es paliativas.<\/li>\n<li>Contacta-nos para obteres mais informa\u00e7\u00f5es sobre este servi\u00e7o.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A Preditec oferece servi\u00e7os de manuten\u00e7\u00e3o preditiva para motores alternativos utilizando equipamento port\u00e1til e sistemas de medi\u00e7\u00e3o cont\u00ednua.<\/p>\n","protected":false},"featured_media":53169,"parent":53026,"menu_order":0,"template":"","categoria-servicio-precitec":[7623,7635,7636],"class_list":["post-53168","servicios-preditec","type-servicios-preditec","status-publish","has-post-thumbnail","hentry","categoria-servicio-precitec-ficha-de-servico","categoria-servicio-precitec-manutencao-preditiva","categoria-servicio-precitec-destaca-a-manutencao-preditiva"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Motores alternativos - Grupo \u00c1lava<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Motores alternativos - Grupo \u00c1lava\" \/>\n<meta property=\"og:description\" content=\"A Preditec 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