Marcă / Model
Alfa Romeo
3
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13
BMW
13
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1
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1
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10
Fiat
15
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4
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1
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1
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2
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6
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1
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1
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2
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6
Peugeot
13
Seat
13
Skoda
14
Volkswagen
13
Volvo
3
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Preț (lei)
Vânzător
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ToyoParts
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Dezautoaim
9744
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LuxAutoDEZ2
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LandRover
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习近平在博鳌亚洲论坛2018年年会开幕式上的主旨演讲( 完整版)
din categoriaSupapa admisie
Neamt.Supapele sunt elementele care inchid si deschid orificiile de trecere a amestecului combustibil in cilindrii motorului si in afara acestora: supapele de admisie permit intrarea amestecului combustibil din galeria de amisie, iar cele de evacuare permit iesirea gazelor arse catre galeria de evacuare. Supapele sunt formate dintr-o tija cilindrica si un taler care opreste efectiv trecerea gazelor prin asezarea etansa pe scaunul supapei. Supapele sunt intens solicitate termic, mecanic si la uzura. Deoarece supapele de admisie sunt instalate in camera de ardere ele pot ajunge sa lucreze la temperaturi de 300-400 de grade Celsius si trebuie fabricate din materiale rezistente. In vederea imbunatatirii performantelor motoarelor se opteaza adeseori pentru marirea numarului de supape aferente fiecarui cilindru, cea mai uzuala varianta actuala fiind cea cu 4 supape pe piston. Inlocuirea supapelor unui motor presupune cunostinte solide de mecanica si accesul la o serie de scule si echipamente speciale.