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Delovna prostornina

En cikel štirivaljnega štiritaktnega motorja. Delovna prostornina je oranžne barve
Delovna prostornina je volumen med GMT in DMT (najvišjo zgornjo in najnižjo spodnjo točko)

Delovna prostornina (volumen) (ang. Displacement, nem. Hubraum) je pomemben parameter pri batnih motorjih. Je prostornina med najvišjo zgornjo lego (TDC) in najnižjo spodnjo lego (BDC) bata. Celotna zgorevalna komora je malce večja kot delovna prostornina, ker ostane nad batom nekaj prostora ko je v najvišji legi.

Delovna prostornina se poda v kubičnih centimetrih (cc ali cm3) ali pa litrih, v Ameriki se pogosto uporablja kubične inče (CID). Prostornina 1 liter je približno enaka 61 kubičnim inčam (CID). V nekaterih državah so cestni davki odvisni od delovne prostornine motorja.

Definicija

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Delovna prostornina je odvisna od premera cilindra, dolžine hoda valja in števila cilindrov.

Primer: Če je premer valja 10 cm, hod 5 cm in imamo štiri valje:

3,1416/4 × (10 cm)2 × 5 cm × 4 = 1 570 cc = 1,57 litrov

Primeri delovnih prostornin

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Glej tudi

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Delovna prostornina
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