{"id":129179,"date":"2025-10-20T09:23:32","date_gmt":"2025-10-20T06:23:32","guid":{"rendered":"https:\/\/realitatearutiera.ro\/?p=129179"},"modified":"2025-10-20T09:23:34","modified_gmt":"2025-10-20T06:23:34","slug":"cum-se-foloseste-frana-de-motor-in-mod-corect","status":"publish","type":"post","link":"http:\/\/realitatearutiera.ro\/?p=129179","title":{"rendered":"Cum se folose\u0219te fr\u00e2na de motor \u00een mod corect"},"content":{"rendered":"\n

Mul\u021bi \u0219oferi nu \u0219tiu c\u0103 ma\u0219ina pe care o conduc poate fi \u00eenfr\u00e2nat\u0103 cu ajutorul motorului. Unii se g\u00e2ndesc, probabil, c\u0103 acest tip de fr\u00e2nare se ac\u021bioneaz\u0103 la fel ca cea de parcare sau cea de picior. \u00cen realitate, intr\u0103 singur\u0103 \u00een func\u021biune atunci c\u00e2nd \u0219oferul ridic\u0103 piciorul de pe accelera\u021bie, dar las\u0103 ma\u0219ina cuplat\u0103 \u00eentr-o treapt\u0103 de viteze. Iat\u0103 cum se folse\u0219te fr\u00e2na de motor \u00een mod corect \u0219i c\u00e2nd e important s\u0103 o ac\u021bion\u0103m.<\/p>\n\n\n\n

Pentru a reduce viteza \u0219i a opri o ma\u0219in\u0103 exist\u0103 trei moduri de a fr\u00e2na. \u00cen cele mai multe situa\u021bii, c\u00e2nd vrem s\u0103 oprim, folosim fr\u00e2na de picior, care ac\u021bioneaz\u0103 direct asupra ro\u021bilor ma\u0219inii.<\/p>\n\n\n\n

Dac\u0103 am oprit, dar vrem s\u0103 ne asigur\u0103m c\u0103 ma\u0219ina nu o ia din loc, tragem fr\u00e2na de m\u00e2n\u0103. La ma\u0219inile moderne, aceasta poate fi ac\u021bionat\u0103 de un buton \u0219i mai poart\u0103 denumirea de \u201efr\u00e2n\u0103 de parcare\u201d.<\/p>\n\n\n\n

Pe l\u00e2ng\u0103 aceste sisteme de fr\u00e2nare, mai exist\u0103 unul: fr\u00e2na de motor<\/a>.<\/p>\n\n\n\n

Ce este fr\u00e2na de motor<\/h2>\n\n\n\n

Fr\u00e2na de motor folose\u0219te propulsorul pentru a reduce viteza, nu un sistem mecanic.<\/p>\n\n\n\n

Acest tip de fr\u00e2nare se ob\u021bine prin retrogradarea succesiv\u0103 dintr-o treapt\u0103 superioar\u0103 \u00eentr-una inferioar\u0103.<\/p>\n\n\n\n

Astfel, motorul nu mai produce energie de mi\u0219care, ci va consuma energia de mi\u0219care a automobilului reduc\u00e2ndu-i viteza.<\/p>\n\n\n\n

Mai exact, fr\u00e2na de motor este reducerea \u201enatural\u0103\u201d a tura\u021biei motorului, prin care se ob\u021bine reducerea vitezei de rota\u021bie a ro\u021bilor.<\/p>\n\n\n\n

Tehnic vorbind, c\u00e2nd folose\u0219ti acest tip de fr\u00e2n\u0103, clapeta de accelera\u021bie se \u00eenchide \u0219i opre\u0219te par\u021bial fluxul de aer c\u0103tre galeria de admisie. Cu c\u00e2t tura\u021bia va fi mai mare, cu at\u00e2t efectul imprimat va fi mai accentuat.<\/p>\n\n\n\n

Cum se folose\u0219te fr\u00e2na de motor \u00een mod corect<\/h2>\n\n\n\n

Acest tip de fr\u00e2nare este recomandat pe suprafe\u021bele de rulare cu aderen\u021b\u0103 redus\u0103 deoarece \u00eempiedic\u0103 blocarea ro\u021bilor. \u00cen acela\u0219i timp, trebuie s\u0103 reduci viteza gradual, adic\u0103 s\u0103 evi\u021bi o retrogradare agresiv\u0103 a treptelor.<\/p>\n\n\n\n

Ceea ce \u00eenseamn\u0103 c\u0103 din viteza a 5-a, de exemplu, la 100 km\/h, po\u021bi reduce \u00een viteza<\/a> a 4-a. Dar nu \u00een viteza a 3-a, pentru c\u0103 ri\u0219ti s\u0103 distrugi transmisia. Iar dup\u0103 ce viteza a sc\u0103zut la aproximativ 60 km\/h, po\u021bi trece \u00een treapta a 3-a. \u0218i tot a\u0219a, p\u00e2n\u0103 c\u00e2nd viteza va sc\u0103dea aproape de zero.<\/p>\n\n\n\n

De exemplu, pe un drum cu z\u0103pad\u0103, e vital\u0103 folosirea fr\u00e2nei de motor. Pentru c\u0103 ac\u021bionarea fr\u00e2nei de picior poate duce la blocarea ro\u021bilor, deci ma\u0219ina va derapa. Fr\u00e2na de motor ajut\u0103, \u00eens\u0103, la reducerea treptat\u0103 \u0219i uniform\u0103 a vitezei, p\u00e2n\u0103 \u00een punctul \u00een care ma\u0219ina va putea fi oprit\u0103 \u00een siguran\u021b\u0103.<\/p>\n\n\n\n

A\u0219adar, c\u00e2nd motorul \u00ee\u0219i reduce tura\u021bia, rota\u021biile scad, implicit viteza cu care ro\u021bile se \u00eenv\u00e2rt scade.<\/p>\n\n\n\n

Este recomandat s\u0103 folose\u0219ti fr\u00e2na de motor \u0219i atunci c\u00e2nd cobori o pant\u0103. Iar \u00een ora\u0219, po\u021bi s\u0103 reduci viteza ma\u0219ini \u00een acest fel pentru a reduce uzura pl\u0103cu\u021belor de fr\u00e2n\u0103.<\/p>\n\n\n\n

Po\u021bi folosi fr\u00e2na de motor dac\u0103 ai cutie automat\u0103?<\/h2>\n\n\n\n

\u0218i dac\u0103 ai o ma\u0219in\u0103 cu transmisie automat\u0103, fr\u00e2na de motor func\u021bioneaz\u0103 la fel. Numai c\u0103 for\u021ba de fr\u00e2nare a motorului va fi mai mic\u0103.<\/p>\n\n\n\n

Iar la unele ma\u0219ini electrice sau hibrid, acest tip de fr\u00e2nare<\/a> are \u0219i rolul de a genera energie \u0219i re\u00eenc\u0103rca acumulatorii.<\/p>\n\n\n\n

Dac\u0103 ma\u0219ina are un sistem semi-automat de schimbare a vitezelor, atunci e suficient s\u0103 reduci succesiv treptele, pe m\u0103sur\u0103 ce viteza scade.<\/p>\n\n\n\n

Sursa\/foto:promotor<\/p>\n","protected":false},"excerpt":{"rendered":"

Mul\u021bi \u0219oferi nu \u0219tiu c\u0103 ma\u0219ina pe care o conduc poate fi \u00eenfr\u00e2nat\u0103 cu ajutorul motorului. Unii se g\u00e2ndesc, probabil,<\/p>\n","protected":false},"author":1,"featured_media":129180,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":""},"categories":[82],"tags":[],"class_list":["post-129179","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-auto"],"jetpack_featured_media_url":"http:\/\/realitatearutiera.ro\/wp-content\/uploads\/2025\/10\/https___www.promotor.ro_wp-content_uploads_2025_10_frana-de-motor-1024x635-1.webp","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p61naM-xBx","jetpack-related-posts":[],"_links":{"self":[{"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/129179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=129179"}],"version-history":[{"count":1,"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/129179\/revisions"}],"predecessor-version":[{"id":129181,"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/129179\/revisions\/129181"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/media\/129180"}],"wp:attachment":[{"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=129179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=129179"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=129179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}