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Problema aer conditionat

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MrTheAlinutzu
post 9 Aug 2015, 13:35
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Salut,am o problema,cand pornesc aerul conditionat,masina trage foarte greu. Mai ales cand plec dupa loc. Stie cineva ce ar putea fi?


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renodood
post 9 Aug 2015, 23:57
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Fizica.

Bine, ca sa nu iti raspund la misto precum ar face-o sigur toti, e NORMAL sa iti traga mai rau. Cu cat e mai submotorizata masina, cu atat vei resimti mai tare activarea ACului. Gandeste-te doar ca adaugi un compresor care iti mananca ceva din putere, asa ca o regula de bun simt ar fi ca la cuplarea ACului sa mergi cu 2-300 de rpm mai mult decat ai face-o in mod normal.

This post has been edited by renodood: 10 Aug 2015, 00:00


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MrTheAlinutzu
post 10 Aug 2015, 05:39
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Multumesc frumos de ajutor!


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RazvanF
post 10 Aug 2015, 07:33
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AC scade 2-3 cai putere la activare.


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renodood
post 10 Aug 2015, 16:05
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Pana si 2-3 cai sunt foarte mult la turatii joase, unde motorul dezvolta putin.

De ex, 1.9 dci dezvolta 107-120 CP la 4000 rpm. La 2000 rpm poate nu face nici jumate, ca nu mai stiu exact curbele de putere/cuplu. Dar de dragul discutiei, sa zicem ca dezolta 50 CP. De acolo, 2-5 CP cat poate lua ACul inseamna 10%. Deci o sarcina suplimentara considerabila.


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AdR!@N
post 10 Aug 2015, 22:39
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Ca si o curiozitate:
Puterea [CP] = (1/7021.55) x Cuplu [Nm] x Turația [rot/min]
Motorul de 120CP parca are 270Nm la 2000 rpm => 70.9CP.....asta cu pedala la podea.

@MrTheAlinutzu nu ar trebui sa fie o diferenta sesizabila cand ai clima pornita si sofezi normal, poate doar in depisirile in forta sau la plecarile cu scartz. Ceva nu este in regula la instalatia de climatizare.


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R19/16v
post 11 Aug 2015, 06:23
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Apasati cu simt de raspundere pe peadala aia din dreapta si masina va pleca de pe loc fara probleme.
Cand pedala de acceleratie e la 100% compresorul se decupleaza.


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renodood
post 11 Aug 2015, 09:29
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Nu stiu daca treaba asta e valabila la toate masinile, va trebui sa testez biggrin.gif

La generatia noua stiu ca e asa, in special la benzinarele aspirate, unde pierderea e sesizabila, dar la dieselurile vechi, inainte sa apara pedalele cu 'kickdown', n-am idee. Oricum, in ideea in care multi merg subturat, ACul va degrada si mai mult performanta, de asta recomand sa nu se circule sub 1800 rpm si sa nu se accelereze in forta sub 2000-2200.

This post has been edited by renodood: 11 Aug 2015, 09:30


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RazvanF
post 11 Aug 2015, 17:22
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QUOTE(R19/16v @ 11 Aug 2015, 06:23)
Cand pedala de acceleratie e la 100% compresorul se decupleaza.
*


E valabil oare si la Clio? AC cuplat si "talpa' dupa ce termin cu accelerarea se aude ac ul recupland. Chiar m-ai facut curios, maine voi testa.
p.s Totusi colegul a zis ca masina "trage foarte greu" , acum ce inseamna pentru el foarte greu? Cu ac cuplat simt ca trage putin mai greu dar nu este asa sesizabil.

This post has been edited by RazvanF: 11 Aug 2015, 17:26


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renodood
post 11 Aug 2015, 23:08
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Am testat pe 1.9-le meu, atat static cat si in mers. La pedala la fund, tot nu decupleaza compresorul. O fi prea veche motorizarea.

La generatiile mai noi exista pozitia de kickdown, care se simte efectiv ca o continuare suplimentara a cursei dupa maxim (ar fi echivalentul apasarii pedalei la peste 100%, adica 125%), ori eu nu am asa ceva, cred ca de acolo vine treaba asta.


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R19/16v
post 12 Aug 2015, 06:55
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Domnilor, daca bietul meu 19 din 1991 stia sa faca treaba asta, nu imi vine a crede ca ale voastre nu stiu...


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LagunaHappyUser
post 12 Aug 2015, 07:32
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Si eo am o problema de genul dar la mine merge pana intr-un anumit loc (10-15min) dupa se blocheaza si imi arata ca bateria foarte descarcata si scade rpm la relantiu si dupa se inchide motoru. mellow.gif si am bateria cumparata Dacia originala Renault grup cu 70 Ah. mellow.gif si iam mai schimbat si cureaua de transmisie... mellow.gif


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boeru_laurentiu
post 12 Aug 2015, 10:27
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Verifica fulia de la alternator !


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LagunaHappyUser
post 12 Aug 2015, 13:02
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oke' am sa verific


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renodood
post 12 Aug 2015, 19:22
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QUOTE(R19/16v @ 12 Aug 2015, 07:55)
Domnilor, daca bietul meu 19 din 1991 stia sa faca treaba asta, nu imi vine a crede ca ale voastre nu stiu...
*


O fi de la faptul ca e diesel vs benzina?

Stiu ca strategia asta de usurare a alternatorului, 'delestage' cum ii zic francezii e doar la kickdown si din ce stiu, doar la benzinare, dar asta o zic doar din prisma faptului ca la mine nu a decuplat la pedala maxima, deci nu bag mana in foc biggrin.gif


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