{"id":423,"date":"2025-01-20T00:14:08","date_gmt":"2025-01-19T23:14:08","guid":{"rendered":"https:\/\/www.6enligne.net\/?post_type=fiche_technique&#038;p=423"},"modified":"2025-01-20T00:20:11","modified_gmt":"2025-01-19T23:20:11","slug":"fonctionnement-et-utilisation-de-relais-en-electricite-automobile","status":"publish","type":"fiche_technique","link":"https:\/\/www.6enligne.net\/?fiche_technique=fonctionnement-et-utilisation-de-relais-en-electricite-automobile","title":{"rendered":"Fonctionnement et utilisation de relais en \u00e9lectricit\u00e9 automobile"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"423\" class=\"elementor elementor-423\">\n\t\t\t\t<div class=\"elementor-element elementor-element-255fa6e e-flex e-con-boxed e-con e-parent\" data-id=\"255fa6e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b36e1df elementor-widget elementor-widget-heading\" data-id=\"b36e1df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">G\u00e9n\u00e9ralit\u00e9s<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04c85f7 elementor-widget elementor-widget-text-editor\" data-id=\"04c85f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>es relais permettent avec un courant d&rsquo;excitation faible (sur la bobine) de commuter des courants importants (par les contacts). Ces commutateurs (appel\u00e9s dans certains cas contacteurs) pr\u00e9sentent la particularit\u00e9 de voir les courants de commande et de puissance totalement s\u00e9par\u00e9s. Les deux tensions peuvent m\u00eame \u00eatre diff\u00e9rentes.<\/p><p>Le relais ci-apr\u00e8s mesure 30 x 25 x 12 mm et est transparent, ce qui permet de voir son architecture interne.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-569ebc4 elementor-widget elementor-widget-image\" data-id=\"569ebc4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"400\" height=\"342\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais011.jpg?fit=400%2C342&amp;ssl=1\" class=\"attachment-large size-large wp-image-424\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais011.jpg?w=400&amp;ssl=1 400w, https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais011.jpg?resize=300%2C257&amp;ssl=1 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ff67081 elementor-widget elementor-widget-heading\" data-id=\"ff67081\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Fonctionnement<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c2e5440 elementor-widget elementor-widget-text-editor\" data-id=\"c2e5440\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>La bobine (1) est aliment\u00e9e.<\/li><li>Elle cr\u00e9e un flux magn\u00e9tique qui attire la partie m\u00e9canique (2).<\/li><li>(2) entra\u00eene par effet de levier la lamelle mobile (3) sur laquelle la tension est disponible.<\/li><li>(3) va \u00e9tablir le contact \u00e9lectrique sur la lamelle de gauche (4, le contact Travail).<\/li><li>Le courant passe entre (3) et (4).<\/li><\/ul><p>Lorsqu&rsquo;on coupe l&rsquo;alimentation de la bobine, les pi\u00e8ces reprennent leur position initiale et le courant ne peut plus passer entre (3) et (4).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c77c2c5 elementor-widget elementor-widget-image\" data-id=\"c77c2c5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"400\" height=\"610\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais011.gif?fit=400%2C610&amp;ssl=1\" class=\"attachment-large size-large wp-image-425\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3698535 elementor-widget elementor-widget-heading\" data-id=\"3698535\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Utilisation en \u00e9lectricit\u00e9 automobile<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-051c37a elementor-widget elementor-widget-text-editor\" data-id=\"051c37a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Alimentation :<\/p><ul><li>de la pompe \u00e0 carburant<\/li><li>de la pompe \u00e0 injection<\/li><li>des calculateurs<\/li><li>des codes, phares et antibrouillards<\/li><li>des avertisseurs sonores (klaxon)<\/li><li>de la ventilation habitacle<\/li><li>des moto-ventilateurs<\/li><li>du compresseur de climatisation<\/li><li>de la pompe d&rsquo;ABS<\/li><\/ul><p>Mani\u00e8re conventionnelle de repr\u00e9senter un relais dans un sch\u00e9ma :<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b62195 elementor-widget elementor-widget-image\" data-id=\"6b62195\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"202\" height=\"264\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais021.jpg?fit=202%2C264&amp;ssl=1\" class=\"attachment-large size-large wp-image-426\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d7f3c21 elementor-widget elementor-widget-text-editor\" data-id=\"d7f3c21\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span>Une variante (avec diode rep\u00e9r\u00e9e en rouge). Quelquefois c&rsquo;est une r\u00e9sistance.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54ae073 elementor-widget elementor-widget-image\" data-id=\"54ae073\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"202\" height=\"264\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais031.jpg?fit=202%2C264&amp;ssl=1\" class=\"attachment-large size-large wp-image-427\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44958d6 elementor-widget elementor-widget-text-editor\" data-id=\"44958d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>La fonction de la diode visible sur le dernier sch\u00e9ma est de canaliser la tension inverse produite par la bobine lorsque l&rsquo;on coupe son alimentation.<\/p><p>Sch\u00e9ma typique d&rsquo;utilisation d&rsquo;un relais en \u00e9lectricit\u00e9 automobile :<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f04a44 elementor-widget elementor-widget-image\" data-id=\"6f04a44\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"463\" height=\"285\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais041.jpg?fit=463%2C285&amp;ssl=1\" class=\"attachment-large size-large wp-image-428\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais041.jpg?w=463&amp;ssl=1 463w, https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais041.jpg?resize=300%2C185&amp;ssl=1 300w\" sizes=\"(max-width: 463px) 100vw, 463px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c47f383 elementor-widget elementor-widget-text-editor\" data-id=\"c47f383\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span>Il existe des relais \u00e0 2, 3, etc. jeux de contacts.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c15ab76 elementor-widget elementor-widget-image\" data-id=\"c15ab76\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"368\" height=\"497\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais051.jpg?fit=368%2C497&amp;ssl=1\" class=\"attachment-large size-large wp-image-429\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais051.jpg?w=368&amp;ssl=1 368w, https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais051.jpg?resize=222%2C300&amp;ssl=1 222w\" sizes=\"(max-width: 368px) 100vw, 368px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-33969dc elementor-widget elementor-widget-heading\" data-id=\"33969dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">D\u00e9pannage<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2636515 elementor-widget elementor-widget-text-editor\" data-id=\"2636515\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Au moment o\u00f9 le relais est aliment\u00e9, on per\u00e7oit nettement un claquement \u00e0 l&rsquo;int\u00e9rieur. Le relais vient de \u00ab\u00a0coller\u00a0\u00bb. Peut-on pour autant en conclure qu&rsquo;il alimente le circuit en aval ? La r\u00e9ponse est :<span>\u00a0<\/span><strong>pas forc\u00e9ment<\/strong>.<\/p><p>En effet pour diverses raisons (usure des contacts, oxydation interne, lamelle cass\u00e9e), le relais peut \u00eatre HS m\u00eame si on l&rsquo;entend claquer.<\/p><p>Il faut donc pour v\u00e9rifier son \u00e9tat, remplacer le relais par un raccordement \u00e9lectrique (bypass) pour alimenter directement l&rsquo;organe en aval.<\/p><p>Pour cela, il suffit de relier sur son support les broches ad\u00e9quates (apr\u00e8s avoir retir\u00e9 le relais).<\/p><p>Si l&rsquo;organe aliment\u00e9 fonctionne \u00e0 nouveau, c&rsquo;est que le relais doit \u00eatre remplac\u00e9.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f275293 elementor-widget elementor-widget-heading\" data-id=\"f275293\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Exemple<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d37b61 elementor-widget elementor-widget-text-editor\" data-id=\"8d37b61\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span>Sur le sch\u00e9ma suivant, on a le relais DDE dont le r\u00f4le est d&rsquo;alimenter le bo\u00eetier de pr\u00e9chauffage, le calculateur, la pompe \u00e0 injection, la pr\u00e9pompe, etc. par sa broche 5. La broche 2 (liaison 2 et 5 \u00e0 l&rsquo;int\u00e9rieur du relais) alimente le calculateur de transmission automatique (quand elle existe).<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed4b512 elementor-widget elementor-widget-image\" data-id=\"ed4b512\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"326\" height=\"324\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais061.jpg?fit=326%2C324&amp;ssl=1\" class=\"attachment-large size-large wp-image-430\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais061.jpg?w=326&amp;ssl=1 326w, https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais061.jpg?resize=300%2C298&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais061.jpg?resize=150%2C150&amp;ssl=1 150w\" sizes=\"(max-width: 326px) 100vw, 326px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-115f630 elementor-widget elementor-widget-text-editor\" data-id=\"115f630\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span>La diode au-dessus de la broche 4 est un d\u00e9trompeur \u00e9lectronique qui impose un sens d&rsquo;alimentation pour la bobine du relais.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d611324 elementor-widget elementor-widget-image\" data-id=\"d611324\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"227\" height=\"200\" src=\"https:\/\/i0.wp.com\/www.6enligne.net\/wp-content\/uploads\/2025\/01\/relais071.jpg?fit=227%2C200&amp;ssl=1\" class=\"attachment-large size-large wp-image-431\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-52abb5d elementor-widget elementor-widget-text-editor\" data-id=\"52abb5d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Pour bypasser ce relais, il faudrait le retirer et relier les broches 8, 5 et 2 directement sur son support.<\/p><p>La num\u00e9rotation standard correspond en g\u00e9n\u00e9ral aux broches marqu\u00e9es 30 et 87.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>G\u00e9n\u00e9ralit\u00e9s es relais permettent avec un courant d&rsquo;excitation faible (sur la bobine) de commuter des courants importants (par les contacts). Ces commutateurs (appel\u00e9s dans certains cas contacteurs) pr\u00e9sentent la particularit\u00e9 de voir les courants de commande et de puissance totalement s\u00e9par\u00e9s. Les deux tensions peuvent m\u00eame \u00eatre diff\u00e9rentes. Le relais [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[5],"tags":[51,13,50],"class_list":["post-423","fiche_technique","type-fiche_technique","status-publish","format-standard","hentry","category-electricite","tag-automobile","tag-bmw","tag-relais"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fonctionnement et utilisation de relais en \u00e9lectricit\u00e9 automobile - 6EnLigne<\/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:\/\/www.6enligne.net\/?fiche_technique=fonctionnement-et-utilisation-de-relais-en-electricite-automobile\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fonctionnement et utilisation de relais en \u00e9lectricit\u00e9 automobile - 6EnLigne\" \/>\n<meta property=\"og:description\" content=\"G\u00e9n\u00e9ralit\u00e9s es relais permettent avec un courant d&rsquo;excitation faible (sur la bobine) de commuter des courants importants (par les contacts). Ces commutateurs (appel\u00e9s dans certains cas contacteurs) pr\u00e9sentent la particularit\u00e9 de voir les courants de commande et de puissance totalement s\u00e9par\u00e9s. Les deux tensions peuvent m\u00eame \u00eatre diff\u00e9rentes. 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