{"id":2527,"date":"2025-11-08T18:59:40","date_gmt":"2025-11-08T17:59:40","guid":{"rendered":"https:\/\/acriv.org\/WP\/?page_id=2527"},"modified":"2025-11-08T18:59:40","modified_gmt":"2025-11-08T17:59:40","slug":"regimes-de-vol","status":"publish","type":"page","link":"https:\/\/acriv.org\/WP\/regimes-de-vol\/","title":{"rendered":"REGIMES DE VOL"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"253\" height=\"199\" src=\"https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/11\/images.jpg\" alt=\"\" class=\"wp-image-2528\" style=\"width:357px;height:auto\" srcset=\"https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/11\/images.jpg 253w, https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/11\/images-133x105.jpg 133w\" sizes=\"auto, (max-width: 253px) 100vw, 253px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">\u2699\ufe0f 1. Le r\u00f4le du m\u00e9lange air-essence<\/h2>\n\n\n\n<p>Le moteur \u00e0 essence fonctionne en br\u00fblant un m\u00e9lange <strong>air + carburant<\/strong> dans les cylindres.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>L\u2019<strong>air<\/strong> apporte l\u2019oxyg\u00e8ne n\u00e9cessaire \u00e0 la combustion.<\/li>\n\n\n\n<li>L\u2019<strong>essence<\/strong> fournit l\u2019\u00e9nergie chimique.<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Le rapport id\u00e9al (dit <strong>st\u0153chiom\u00e9trique<\/strong>) est :<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>14,7 g d\u2019air pour 1 g d\u2019essence<\/strong><br>(c\u2019est le rapport Air\/Essence id\u00e9al pour une combustion compl\u00e8te sans exc\u00e8s ni manque de carburant).<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd25 2. M\u00e9lange riche et m\u00e9lange pauvre<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Type de m\u00e9lange<\/th><th>Rapport Air\/Essence<\/th><th>Effet principal<\/th><\/tr><\/thead><tbody><tr><td><strong>Riche<\/strong> (plus d\u2019essence)<\/td><td>&lt; 14,7:1<\/td><td>Plus de puissance mais plus de consommation et pollution<\/td><\/tr><tr><td><strong>Pauvre<\/strong> (moins d\u2019essence)<\/td><td>&gt; 14,7:1<\/td><td>\u00c9conomie de carburant mais perte de puissance et risque de surchauffe<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Un moteur ne fonctionne <strong>pas toujours<\/strong> avec le m\u00eame m\u00e9lange : il s\u2019adapte selon le r\u00e9gime, la charge et la temp\u00e9rature.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\udded 3. Premier et second r\u00e9gime (carburateur)<\/h2>\n\n\n\n<p>Ces termes viennent surtout des <strong>moteurs \u00e0 carburateur<\/strong> (comme sur les mobylettes, motos anciennes, tondeuses, etc.).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83c\udf00 Premier r\u00e9gime (r\u00e9gime de ralenti \/ bas r\u00e9gime)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Le papillon des gaz est <strong>presque ferm\u00e9<\/strong>.<\/li>\n\n\n\n<li>Le moteur aspire <strong>peu d\u2019air<\/strong>, donc le circuit de <strong>ralenti<\/strong> du carburateur alimente le moteur.<\/li>\n\n\n\n<li>Le m\u00e9lange doit \u00eatre <strong>relativement riche<\/strong>, pour faciliter :\n<ul class=\"wp-block-list\">\n<li>la combustion stable \u00e0 bas r\u00e9gime,<\/li>\n\n\n\n<li>le d\u00e9marrage \u00e0 froid,<\/li>\n\n\n\n<li>et \u00e9viter les rat\u00e9s d\u2019allumage.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><strong>\u2192 Si trop pauvre \u00e0 ce stade :<\/strong> le moteur cale ou tourne de fa\u00e7on irr\u00e9guli\u00e8re.<br><strong>\u2192 Si trop riche :<\/strong> il fume, s\u2019encrasse et r\u00e9pond lentement.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udca8 Second r\u00e9gime (r\u00e9gime moyen \u00e0 haut)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Le papillon s\u2019ouvre davantage.<\/li>\n\n\n\n<li>L\u2019aspiration d\u2019air augmente : le <strong>gicleur principal<\/strong> entre en action.<\/li>\n\n\n\n<li>Le m\u00e9lange devient <strong>plus pauvre<\/strong>, proche du rapport id\u00e9al (voire l\u00e9g\u00e8rement riche \u00e0 pleine charge) pour obtenir :\n<ul class=\"wp-block-list\">\n<li><strong>Puissance maximale<\/strong>,<\/li>\n\n\n\n<li><strong>Bon refroidissement<\/strong>,<\/li>\n\n\n\n<li><strong>Combustion stable<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><strong>\u2192 Trop pauvre \u00e0 haut r\u00e9gime :<\/strong> risque de cliquetis, surchauffe, voire serrage.<br><strong>\u2192 Trop riche :<\/strong> moteur \u201cengorg\u00e9\u201d, fum\u00e9e noire, perte de tours.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u26a1 4. Influence sur les performances<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Situation<\/th><th>M\u00e9lange typique<\/th><th>Effet sur les performances<\/th><\/tr><\/thead><tbody><tr><td><strong>D\u00e9marrage \/ ralenti<\/strong><\/td><td>Riche<\/td><td>D\u00e9marrage facile, ralenti stable<\/td><\/tr><tr><td><strong>Acc\u00e9l\u00e9ration<\/strong><\/td><td>Enrichi temporairement<\/td><td>R\u00e9ponse rapide, \u00e9vite trous \u00e0 l\u2019acc\u00e9l\u00e9ration<\/td><\/tr><tr><td><strong>R\u00e9gime stabilis\u00e9 (croisi\u00e8re)<\/strong><\/td><td>L\u00e9g\u00e8rement pauvre<\/td><td>\u00c9conomie de carburant<\/td><\/tr><tr><td><strong>Pleine charge \/ haut r\u00e9gime<\/strong><\/td><td>L\u00e9g\u00e8rement riche<\/td><td>Meilleure puissance et refroidissement du moteur<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\uddf0 5. En r\u00e9sum\u00e9<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u00c9l\u00e9ment cl\u00e9<\/th><th>Premier r\u00e9gime<\/th><th>Second r\u00e9gime<\/th><\/tr><\/thead><tbody><tr><td>Alimentation<\/td><td>Circuit de ralenti<\/td><td>Gicleur principal<\/td><\/tr><tr><td>M\u00e9lange id\u00e9al<\/td><td>Riche (\u224812\u201313:1)<\/td><td>Pr\u00e8s de 14,7:1 ou l\u00e9g\u00e8rement riche<\/td><\/tr><tr><td>Objectif<\/td><td>Stabilit\u00e9 et souplesse<\/td><td>Puissance et rendement<\/td><\/tr><tr><td>Risque si mauvais r\u00e9glage<\/td><td>Calage, rat\u00e9s, encrassement<\/td><td>Chauffe, perte de puissance, serrage<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u2699\ufe0f 1. Le r\u00f4le du m\u00e9lange air-essence Le moteur \u00e0 essence fonctionne en br\u00fblant un m\u00e9lange air + carburant dans les cylindres. \ud83d\udc49 Le rapport id\u00e9al (dit st\u0153chiom\u00e9trique) est : 14,7 g d\u2019air pour 1 g d\u2019essence(c\u2019est le rapport Air\/Essence id\u00e9al pour une combustion compl\u00e8te sans exc\u00e8s ni manque de carburant). \ud83d\udd25 2. M\u00e9lange riche et m\u00e9lange pauvre Type de<\/p>\n<p><a class=\"more-link\" href=\"https:\/\/acriv.org\/WP\/regimes-de-vol\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2527","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages\/2527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/comments?post=2527"}],"version-history":[{"count":1,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages\/2527\/revisions"}],"predecessor-version":[{"id":2529,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages\/2527\/revisions\/2529"}],"wp:attachment":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/media?parent=2527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}