Capteurs de pression absolue - MAP<\/p>\n
Comment cela fonctionne-t-il ?
\nPour optimiser le m\u00e9lange air-carburant et am\u00e9liorer les performances de combustion et d'allumage, le volume d'air admis dans le moteur doit \u00eatre constamment contr\u00f4l\u00e9 et ajust\u00e9. Les capteurs de pression absolue du collecteur (MAP) sont essentiels \u00e0 ce processus.
\nCapteur de vide compact \u00e0 semi-conducteur, le capteur MAP tire parti de l'effet de r\u00e9sistance pi\u00e9zo\u00e9lectrique, o\u00f9 la r\u00e9sistance \u00e9lectrique change lorsqu'une pression est appliqu\u00e9e au silicium. Cet effet est utilis\u00e9 pour mesurer la pression dans le collecteur d'admission en aval du papillon des gaz. La mesure de la pression est ensuite transmise \u00e0 l'ECU du moteur par des signaux \u00e9lectriques et est utilis\u00e9e pour calculer le volume d'air d'admission. Une fois ce volume calcul\u00e9, l'ECU peut ajuster les performances du moteur afin d'assurer un contr\u00f4le optimal du rapport air-carburant.
\nBien qu'il s'agisse de la fonction premi\u00e8re des capteurs MAP, ces pi\u00e8ces sont \u00e9galement utilis\u00e9es pour mesurer la pression de suralimentation entrant dans le papillon des gaz et la pression de la galerie du turbo afin d'optimiser les performances du moteur dans des environnements de suralimentation ou de turbocompression s\u00e9v\u00e8res.<\/p>\n
Caract\u00e9ristiques et avantages :<\/p>\n
\u2981 Le montage de puces nues signifie moins de composants et une taille compacte.
\n\u2981 L'annulation du bruit sur la puce r\u00e9duit le nombre de composants n\u00e9cessaires.
\n\u2981 La surface durable \u00e0 deux couches r\u00e9siste \u00e0 l'environnement difficile du collecteur d'admission.
\n\u2981 Les liaisons offrent une plus grande fiabilit\u00e9 et une installation plus facile.<\/p>\n
Quelles sont les d\u00e9faillances possibles des capteurs MAP ?<\/p>\n
\u2981 Toute substance ou humidit\u00e9 \u00e9lev\u00e9e dans l'air d'admission p\u00e9n\u00e9trant dans l'orifice de pression peut entra\u00eener une d\u00e9faillance des capteurs MAP.
\n\u2981 Des fuites de vide dans les syst\u00e8mes du collecteur d'admission ou dans le tuyau reliant le capteur MAP au moteur peuvent entra\u00eener un dysfonctionnement du capteur MAP.
\n\u2981 Les courts-circuits et les ouvertures dans le circuit de c\u00e2blage du capteur MAP peuvent entra\u00eener une divergence des caract\u00e9ristiques ou un dysfonctionnement.<\/p>\n
Quels sont les sympt\u00f4mes des capteurs MAP ?<\/p>\n
\u2981 Perte de puissance du moteur.
\n\u2981 Ralenti irr\u00e9gulier et instable.
\n\u2981 Mauvaise conduite, y compris h\u00e9sitation lors de l'acc\u00e9l\u00e9ration.
\n\u2981 Se verrouille peu apr\u00e8s le d\u00e9marrage ou lorsque l'on appuie ou rel\u00e2che l'acc\u00e9l\u00e9rateur.<\/p>\n
Comment pr\u00e9venir et r\u00e9soudre les pannes du capteur MAP ?<\/p>\n
\u2981 Un probl\u00e8me au niveau du capteur MAP peut entra\u00eener l'allumage du t\u00e9moin d'alerte moteur. Ce d\u00e9faut est enregistr\u00e9 sous le code de diagnostic (DTC) dans le calculateur du moteur (P0105...P0109) et peut \u00eatre contr\u00f4l\u00e9 \u00e0 l'aide d'un outil de balayage DTC.
\n\u2981 Un capteur MAP d\u00e9fectueux peut ne pas mettre le v\u00e9hicule hors service, mais doit \u00eatre remplac\u00e9 d\u00e8s que possible pour \u00e9viter tout dommage potentiel au moteur dans des conditions de carburant riche ou pauvre caus\u00e9es par un capteur MAP d\u00e9fectueux.
\n\u2981 S'assurer qu'il n'y a pas d'anomalies dans la d\u00e9pression du collecteur d'admission dues \u00e0 des fuites ou \u00e0 d'autres probl\u00e8mes du syst\u00e8me.<\/p>","protected":false},"excerpt":{"rendered":"
Senzori de presiune absoluta\u00a0 \u2013 MAP Cum func\u021bioneaz\u0103: Pentru a optimiza amestecul aer-combustibil \u0219i pentru a \u00eembun\u0103t\u0103\u021bi performan\u021ba de ardere \u0219i aprindere, volumul de aer admis \u00een motor trebuie monitorizat \u0219i reglat \u00een mod constant.\u00a0Senzorii de presiune absolut\u0103 \u00een colector (MAP) sunt esen\u021biali pentru acest proces. Un senzor de vid cu semiconductor compact, senzorul MAP profit\u0103 de efectul de rezisten\u021b\u0103 piezoeletric, unde rezisten\u021ba electric\u0103 se modific\u0103 atunci c\u00e2nd se aplic\u0103 presiune pe silicon.\u00a0Acest efect este utilizat pentru a m\u0103sura presiunea \u00een galeria de admisie care vine \u00een aval de supapa de accelera\u021bie.\u00a0M\u0103surarea presiunii este apoi transmis\u0103 la ECU motorului prin semnale electrice \u0219i este utilizat\u0103 pentru a calcula volumul de aer admis.\u00a0Odat\u0103 ce aceasta este calculat\u0103, ECU poate ajusta performan\u021ba motorului pentru a asigura un control optim al raportului aer-combustibil. De\u0219i aceasta este func\u021bia principal\u0103 a senzorilor MAP, aceste piese sunt, de asemenea, utilizate pentru a m\u0103sura presiunea de supraalimentare care vine \u00een supapa de accelera\u021bie \u0219i presiunea din galeria turbo pentru a optimiza performan\u021ba motorului \u00een medii severe de turboalimentare sau supraalimentare. Caracteristici \u0219i Beneficii: \u2981 Montarea cipului gol \u00eenseamn\u0103 mai pu\u021bine componente \u0219i o dimensiune compact\u0103. \u2981 Anularea zgomotului pe cip reduce num\u0103rul de componente necesare. \u2981 Suprafa\u021ba durabil\u0103 cu dou\u0103 straturi face fa\u021b\u0103 mediului dur al galeriei de admisie. \u2981 Conexiunile de leg\u0103tur\u0103 ofer\u0103 o fiabilitate mai mare \u0219i o instalare mai u\u0219oar\u0103. Care sunt posibilele defec\u021biuni ale senzorilor MAP? \u2981 Orice substan\u021be sau umiditate ridicat\u0103 din aerul de admisie care intr\u0103 \u00een orificiul de presiune pot cauza o defec\u021biune a senzorilor MAP. \u2981 Scurgerile de vid \u00een sistemele galeriei de admisie sau furtunul care conecteaz\u0103 senzorul MAP la motor pot cauza func\u021bionarea necorespunz\u0103toare a senzorului MAP. \u2981 Scurtcircuit\u0103rile \u0219i deschiderile \u00een circuitul de cablare al senzorului MAP pot cauza o discrepan\u021b\u0103 \u00een caracteristici sau o func\u021bionare defectuoas\u0103. Care sunt simptomele senzorilor MAP? \u2981 Pierderea puterii motorului. \u2981 Mersul la ralanti dur \u0219i instabil. \u2981 Conducere slab\u0103, inclusiv ezitare \u00een timpul accelera\u021biei. \u2981 Se blocheaz\u0103 la scurt timp dup\u0103 pornire sau c\u00e2nd accelera\u021bia este ap\u0103sat\u0103 sau eliberat\u0103. Cum se pot preveni \u0219i rezolva defec\u021biunile senzorului MAP? \u2981 O problem\u0103 cu senzorul MAP poate face ca lampa de avertizare a motorului s\u0103 se aprind\u0103.\u00a0Aceast\u0103 defec\u021biune este stocat\u0103 sub codul de diagnosticare a erorilor (DTC) \u00een ECU-ul motorului (P0105\u2026P0109) \u0219i poate fi inspectat\u0103 de un instrument de scanare DTC. \u2981 Este posibil ca un senzor MAP defect s\u0103 nu dezactiveze vehiculul, dar ar trebui \u00eenlocuit c\u00e2t mai cur\u00e2nd posibil pentru a evita poten\u021bialele daune ale motorului \u00een condi\u021bii de combustibil bogat sau s\u0103rac cauzate de func\u021bionarea defectuoas\u0103 a senzorului MAP. \u2981 Asigura\u021bi-v\u0103 c\u0103 nu exist\u0103 anomalii \u00een vidul galeriei de admisie din cauza scurgerilor sau a altor probleme ale sistemului.<\/p>","protected":false},"author":1,"featured_media":3690,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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de presiune absoluta\u00a0 \u2013 MAP Cum func\u021bioneaz\u0103: Pentru a optimiza amestecul aer-combustibil \u0219i pentru a \u00eembun\u0103t\u0103\u021bi performan\u021ba de ardere \u0219i aprindere, volumul de aer admis \u00een motor trebuie monitorizat \u0219i reglat \u00een mod constant.\u00a0Senzorii de presiune absolut\u0103 \u00een colector (MAP) sunt esen\u021biali pentru acest proces. Un senzor de vid cu semiconductor compact, senzorul MAP\u2026","_links":{"self":[{"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/posts\/3689","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/comments?post=3689"}],"version-history":[{"count":1,"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/posts\/3689\/revisions"}],"predecessor-version":[{"id":3691,"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/posts\/3689\/revisions\/3691"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/media\/3690"}],"wp:attachment":[{"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/media?parent=3689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/categories?post=3689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/automotivesolutions.ro\/fr\/wp-json\/wp\/v2\/tags?post=3689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}