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> Distributie variabila, pe dacia 1310

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payty
post 4 Nov 2009, 17:20
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salutare tuturor. citind o carte mai veche de motoare, scrisa de un profesor roman de la facultatea de mecanica, am descoperit un sistem foarte simplu de distributie variabila care se poate adapta pe dacie. revin cu o plansa din cartea respectiva cand voi avea timp sa o scanez.

sistemul este foarte simplu, si explicat acolo pare realizabil, problema e ca necesita oarece calcule.


Se bazeaza pe introducerea a doua arcuri de supapa, in serie, unul moale si unul tare. la turatii mici, sistemul functioneaza ca unul clasic, dar la turatie mare, datorita inertiei, tachetul "sare" pe cama si inchiderea e intarziata din ce in ce mai mult. mai exista si un amortizor hidraulic care amortizeaza socurile in special cand sistemul actioneaza la turatii mari.

Pe net am gasit doar urmatorul articol
http://books.google.ro/books?id=uRAgliO29Z...0timing&f=false


nu stiu daca a mai auzit cineva despre asta, ca de realizat sigur nu a realizat nimeni. in cartea respectiva spunea ca s-a realizat un experiment cu un motor de dacie care a fost modificat in felul asta cu succes.





PS.imi merge netul ca naiba. rog un moderator sa stearga celalalt topic.

This post has been edited by payty: 4 Nov 2009, 17:30


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Muttley
post 4 Nov 2009, 17:42
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Am citit linkul dar tot n-am inteles amortizarea aia cum se face.
Sa presupunem totusi ca se realizeaza amortizarea cama-tachet. Dar ce faci cu amortizarea tija-tachet? Dar cu cea tija-culbutor? Dar cu cea culbutor-supapa? Si tare banuiesc la prima vedere c-or s-apara socuri arc-taler arc, supapa-scaun, taler arc-semiconuri (astea cu potentiale urmari grave)...

E simpla solutia ca principiu. Ma foarte indoiesc c-ar functiona cu rezultate bune in practica.

Astept scanul din cartea romanului.

This post has been edited by Muttley: 4 Nov 2009, 18:58


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Tiberiu-Andrei
post 4 Nov 2009, 20:04
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Payty, eu din ce-am pricipit nu e niciun amortizor hidraulic acolo.Doar ca sistemul s-ar comporta ca unul.Acea amortizare se realizeaza in ulei.
Revin imediat cu un desen.

PS:termenii astia in engleza nu prea seamana cu aia din bijnis inglish. radmasa.gif


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AAlpine1
post 5 Nov 2009, 09:59
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daca era o inventie asa de strasnica o puneau altii in practica inaintea voastra smile.gif))))))))))))


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ma urmareste vis-a-vis :))))
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payty
post 5 Nov 2009, 23:01
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uau, au inviat "profesorii" din umbra... smile.gif

revin maine cu plansa scanata.

This post has been edited by payty: 5 Nov 2009, 23:01


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gaby-cta-ro
post 6 Nov 2009, 15:19
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Ca da rezultate sau nu, habar nu am, dar este interesanta ideea (macar ptr cultura generala) .
Hai cu scan- ul. nedumerire.gif


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pcostica
post 6 Nov 2009, 16:01
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s-ar putea se fie de viitor! Cercetari s-au facut.Attached File  398AT210.doc ( 2.29mb ) Number of downloads: 125

Bafta!


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payty
post 7 Nov 2009, 22:52
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pozele promise. in prima poza, textul contine si alte chestii in plus de la sistemul de distributie variabila cu alunecare axiala a axei cu came.

This post has been edited by payty: 7 Nov 2009, 22:54

Attached thumbnail(s)
dv1.JPG ( Size: 50.98k ) Number of downloads: 614
dv2.JPG ( Size: 68.94k ) Number of downloads: 667


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mad toz
post 8 Nov 2009, 21:00
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Trebuie sa stii fortele care apasa pe arc, de ex : la 3000 rpm si 4000rpm.


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djasu82
post 8 Nov 2009, 21:36
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care se incumeta fiindca sunt curios evident cei care au si scule ...


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payty
post 8 Nov 2009, 22:16
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cred ca o problema a acestui sistem e ca nu prea se pot gasi arcuri identice . in felul asta e posibil ca numarul de grade de deschidere la doua supape diferite sa varieze.

oricum, merita incercat, desi nu stiu cum se poate face amortizorul acela hidraulic.


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pcostica
post 8 Nov 2009, 23:44
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arcurile se pot tara, nu cred ca asta e problema! Cred ca trebuiesc facute ceva calcule.
Bafta!

This post has been edited by pcostica: 8 Nov 2009, 23:46


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mad toz
post 9 Nov 2009, 12:06
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Problema e ,cum am spus si mai sus , trebuie sa stii fortele care apasa pe arc.
Am vazut azi in Politehnica poze cu motorul cu distributie balistica.


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panter1
post 9 Nov 2009, 18:22
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mai bine puneti o axa cu came de renault 11, am inteles ca s-ar potrivi pe dacie, si are timpi mult mai buni. Nasul meu are un Renault 11 cu motor carburatie de 1.4 si 75 CP, iar masina trage mai bine decat o dacie normala.. iar daca se pune pe o cilindree de 1.6 ar ajunge pe la 85-90 Cp. Luati-o ca pe o parere smile.gif

This post has been edited by panter1: 10 Nov 2009, 02:10


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payty
post 9 Nov 2009, 19:14
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QUOTE(mad toz @ 9 Nov 2009, 12:06)
Problema e ,cum am spus si mai sus , trebuie sa stii fortele care apasa pe arc.
Am vazut azi in Politehnica poze cu motorul cu distributie balistica.
*




deci pana la urma s-a realizat practic. e o chestie pozitiva.


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mad toz
post 10 Nov 2009, 23:15
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Da o sa atasez si o poza cu motorul, desi nu se vedem nimic ,decat un simplu motor de dacie.


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panter1
post 11 Nov 2009, 00:26
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se obtin ceva caluti putere in plus sau cuplu mai mare la turatii mari fata de distributia fixa? Ce stii de asta?

This post has been edited by panter1: 11 Nov 2009, 00:26


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