{"id":6915,"date":"2020-01-19T16:41:07","date_gmt":"2020-01-19T21:41:07","guid":{"rendered":"https:\/\/techlinkfrench.mynetworkcontent.com\/?p=6915"},"modified":"2020-02-19T16:41:44","modified_gmt":"2020-02-19T21:41:44","slug":"vibration-du-moteur-v8-a-1200-tr-min","status":"publish","type":"post","link":"https:\/\/gm-techlinkfrench.com\/?p=6915","title":{"rendered":"Vibration du moteur V8 \u00e0 1200 tr\/min"},"content":{"rendered":"<p>Certains mod\u00e8les Silverado 1500 et Sierra 1500 2019-2020 \u00e9quip\u00e9s du moteur V8 de 5,3 L ou 6,2 L (EFC L82, L84, L87) peuvent produire des vibrations ou \u00e9mettre un bourdonnement \u00e0 environ 40 mi\/h et 1200 tr\/min sous une charge l\u00e9g\u00e8re. \u00c0 environ 1200 tr\/min, lorsque le syst\u00e8me de gestion de carburant dynamique\/gestion de carburant active (DFM\/AFM) fonctionne, le probl\u00e8me semble empirer lorsque le moteur a atteint la temp\u00e9rature de fonctionnement.<\/p>\n<p>Si le v\u00e9hicule maintient la vitesse, le r\u00e9gime moteur et la charge du moteur en mode DFM\/AFM, la tonalit\u00e9 de la vibration peut changer de mani\u00e8re notable et l&#8217;amplitude peut diminuer l\u00e9g\u00e8rement, car diff\u00e9rents cylindres sont d\u00e9sactiv\u00e9s.<\/p>\n<p>Un examen des fichiers de l&#8217;oscilloscope automobile PicoScope CH-51450 enregistr\u00e9s pendant la reproduction du probl\u00e8me peut r\u00e9v\u00e9ler :<\/p>\n<ul>\n<li>\u00c0 la premi\u00e8re occurrence de la vibration, il pourrait y avoir une grande cr\u00eate align\u00e9e avec E1 (Fig. 6, no 1) et E2 (Fig. 6 no 2).<\/li>\n<li>Apr\u00e8s le changement de tonalit\u00e9, la vibration n&#8217;est plus directement align\u00e9e avec E1 (Fig. 7, no 3) et E2 (Fig. 7, no 4).<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12528\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F06-vibe-1.png\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" srcset=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F06-vibe-1.png 740w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F06-vibe-1-300x195.png 300w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F06-vibe-1-85x55.png 85w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F06-vibe-1-200x130.png 200w\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 6<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12529\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F07-vibe-2.png\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" srcset=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F07-vibe-2.png 740w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F07-vibe-2-300x195.png 300w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F07-vibe-2-85x55.png 85w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F07-vibe-2-200x130.png 200w\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 7<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Si la vibration est rep\u00e9r\u00e9e, d\u00e9poser et inspecter le support de bo\u00eete de vitesses pour d\u00e9celer des d\u00e9bris (Fig. 8). Nettoyer et reposer le support, puis \u00e9valuer le probl\u00e8me de vibration.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-12530\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F08-vibe-3.png\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" srcset=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F08-vibe-3.png 740w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F08-vibe-3-300x195.png 300w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F08-vibe-3-85x55.png 85w, https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2020\/01\/F08-vibe-3-200x130.png 200w\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 8<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><em>&#8211; Merci \u00e0 Richard Renshaw<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Certains mod\u00e8les Silverado 1500 et Sierra 1500 2019-2020 \u00e9quip\u00e9s du moteur V8 de 5,3 L ou 6,2 L (EFC L82, L84, L87) peuvent produire des vibrations ou \u00e9mettre un bourdonnement [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6915","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/6915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6915"}],"version-history":[{"count":1,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/6915\/revisions"}],"predecessor-version":[{"id":6916,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/6915\/revisions\/6916"}],"wp:attachment":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}