Bore (engine)

Bore (engine)

Bore is the diameter measurement of the cylinders in a piston engine.

Engine displacement is calculated by:

 \mbox{displacement} = {\pi\over 4} \times \mbox{bore}^2 \times \mbox{stroke} \times \mbox{number of cylinders}

The term "bore" can also be applied to the bore of a locomotive cylinder.

See also

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  • bore-stroke ratio — The relation between the diameter of the cylinder bore and the length of the stroke of the piston. If the stroke is longer than the cylinder bore diameter then the engine is called a long stroke engine. If the stroke is shorter than the cylinder… …   Dictionary of automotive terms

  • bore — bore1 boreable, borable, adj. /bawr, bohr/, v., bored, boring, n. v.t. 1. to pierce (a solid substance) with some rotary cutting instrument. 2. to make (a hole) by drilling with such an instrument. 3. to form, make, or construct (a tunnel, mine,… …   Universalium

  • bore — {{11}}bore (n.) thing which causes ennui or annoyance, 1778; of persons by 1812; from BORE (Cf. bore) (v.1). {{12}}bore (v.1) O.E. borian to bore through, perforate, from bor auger, from P.Gmc. *buron (Cf. O.N. bora, Swed. borra, O.H.G. boron,… …   Etymology dictionary

  • bore — I. verb (bored; boring) Etymology: Middle English, from Old English borian; akin to Old High German borōn to bore, Latin forare to bore, ferire to strike Date: before 12th century transitive verb 1. to pierce with a turning or twisting movement… …   New Collegiate Dictionary

  • bore — I [[t]bɔr, boʊr[/t]] v. bored, bor•ing, n. 1) to pierce (a solid substance) with some rotary cutting instrument 2) to make (a hole) with such an instrument 3) civ to make (a tunnel, mine, passage, etc.) by hollowing out, cutting through, or… …   From formal English to slang

  • bore — 1. v. & n. v. 1 tr. make a hole in, esp. with a revolving tool. 2 tr. hollow out (a tube etc.). 3 tr. a make (a hole) by boring or excavation. b make (one s way) through a crowd etc. 4 intr. (of an athlete, racehorse, etc.) push another… …   Useful english dictionary

  • bore — The inside diameter of the cylinder of a reciprocating engine …   Aviation dictionary

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