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Anglicky v odbornch pedmtech"Support of teaching technical subjects in EnglishTutorial: Physics

Topic : Moving parts of combustion engine

Prepared by : RNDr. Ondej Jebek

Projekt Anglicky v odbornch pedmtech, CZ.1.07/1.3.09/04.0002je spolufinancovn Evropskm socilnm fondem a sttnm rozpotem esk republiky.

Moving parts of combustion engines

Explanation:It transmits the movement which is caused by gas expansion during combustion processesIt changes rectilinear movement to rotary oneIt transmits rotary movement from engine to gearboxUsage:Car engines, hand cars enginesSignificance of moving parts of combustion engines

Crank mechanism:CrankshaftPiston rodPiston pinPiston ringsPistonEngine distribution:CamshaftValve rodCam followerSuction and exhaust valveTypes of distributorsOHCOHVStationary engine parts

Crankshaft:It is placed in engine blockNumber of bearings at crankshaft determines the number of crankshaft placingIt changes rectilinear movement to rotary oneCrankshaft can be produced by one part or it can be assembledCrank mechanism

Piston rod:It is placed in piston pins of crankshaftIt transmits forces to crankshaft having the effect to pistonMain parts are:EyeHeadShankCrank mechanism

Piston:It retains gas pressure made by combustion of inflammable mixtureIt is often made of aluminium alloys because it quickly conducts heatIt is designed so that it has minimal heat expansionMain parts are:Head TopBodyCrank mechanism

Piston pin:It connects piston pin with piston rodIt makes the piston movement possiblePiston rings:They seal combustion spaceThey scrape oil of valve sides

Crank mechanism

Camshaft:Shaft is recessed by cam shaftsIt is driven by belt or by chainRatio between crankshaft and camshaft is 2:1The valve movement is controlled by camshaft rotation

Engine distributors

Cam follower, valve rod, rocker arm, suction and exhaust valve:

Engine distributors

OHVCamshaft is placed in engine blockMovement is transmitted of camshaft through cam follower by valve rod, rocker arm to valveValves are placed in engine head

Types of distributors

OHCCamshaft is placed in engine headMovement is transmitted of camshaft through cam follower directly to valveValves are placed in engine head

Types of distributors

Name rotary parts of combustion enginesExplain the meaning of engine piston rod and piston

Activity II

Describe these engine parts:

Activity I

JAN, Zdenk; DNSK, Bronislav ; UPERA, Ji . Automobily 1. Brno: Avid, 2004. 211 s.JAN, Zdenk; DNSK, Bronislav ; UPERA, Ji . Automobily 2. Brno: Avid, 2004. 120 s.JAN, Zdenk; DNSK, Bronislav ; UPERA, Ji . Automobily 3. Brno: Avid, 2004. 220 s.JAN, Zdenk; DNSK, Bronislav ; UPERA, Ji . Automobily 4. Brno: Avid, 2004. 350 s.Translation:www.seznam.czwww.slovnik.czJANATA, Petr. Handy slovnk technick anglicko-esk a esko-anglick. Plze: Nakladatelstv Fraus, 2000. ISBN 80-7238-075-3Lingea LEXIKON 5, Technick slovnk anglicko-esk a esko-anglick. 2010.

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