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> caut un topic, despre mersul la punctul mort

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ArtVandelay
post 21 Jan 2009, 22:04
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mai exact explicatia pentru care nu e bine, nu mai gasesc deloc topicul, daca il stie cineva sa lase link smile.gif


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Asi
post 21 Jan 2009, 22:21
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La punctul mort al scimbatorului de viteze?

Pai exista vreo 3 probleme:

1 Nu beneficiezi de frana de motor
2 Exista consum de ralanti (in frana de motor consumul e 0, cel putin la injectie, dar se poate si la carburatie)
3 Afecteaza cutia de viteze daca circuli la punctul mort la viteze mari

Punctul 3 o idee detaliat: cutia de viteze are 2 arbori Unu din ei e legat la ambriaj-motor, celelat e legat la diferential-roti
Pe arborele secundar (cel cu diferentialul) exista sincronizatoare, si rotile dintate care sunt prinse cu joc pe arbore, pt a se invarti independent de arbore (ele sunt invartite de rotile dintate de pe arborele primar care la randul lor sunt legate rigid de acest arbore).
Problema intervine in uzarea lagarelor rotilor dintate de pe arborele secundar intrucat va exista o diferenta de viteza foarte mare
Adica scoti din viteza pe autostrada la 130km/h, arborele secundar (doar arborele) se invarte cu o viteza mare, e legat direct de diferentia-roti
Dar rotile dintate de pe acest arbore sunt invartite de motor, care se afla la ralanti, adica se invart relativ incet. Diferenta asta foarte mare duce la temperatura mare, si deteriorarea acestor lagare.
Sa fie treaba buna cu mersul in gol ar fi bine sa ti motorul turat in gol, dar nu are sens, mai bine bagi intr-o treapta de viteza si ai terminat balciul.


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Iulikk
post 21 Jan 2009, 22:34
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Cam de aici incepe discutia despre "mersul in punctu' mort"

http://www.daciaclub.ro/index.php?showtopi...dpost&p=1691196


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ArtVandelay
post 21 Jan 2009, 22:39
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Mersi Asi si Iulikk, se poate inchide


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Marty
post 21 Jan 2009, 23:10
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Stati un pic, nu inchideti!
Si eu caut un topic, ala cu testu' de cultura.... Cine poate da relatii unde e, sa nu-i dea linku' lu' Ainjtain.
Va multumesc!


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marksman
post 22 Jan 2009, 01:42
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Subscriu!


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ArtVandelay
post 22 Jan 2009, 01:43
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cred ca s-a sters sad.gif

This post has been edited by ArtVandelay: 22 Jan 2009, 01:43


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Ford focus 2001
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Bulldog
post 22 Jan 2009, 01:52
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ArtVandelay, uite aici o explicatie si hazlie si destul de pertinenta a lui Muttley despre mersul "la liber":

http://www.daciaclub.ro/index.php?showtopi...dpost&p=1490767


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