Anglicky v odborných předmětech "Support of teaching technical subjects in English “

1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Physics Topic : Movingpartsofcombustionengine Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

2. Moving parts of combustion engines

3. Significance of moving parts of combustion engines Explanation: • It transmits the movement which is caused by gas expansion during combustion processes • It changes rectilinear movement to rotary one • It transmits rotary movement from engine to gearbox Usage: Car engines, hand car’s engines

4. Stationaryengineparts • Crank mechanism: • Crankshaft • Piston rod • Piston pin • Piston rings • Piston • Engine distribution: • Camshaft • Valve rod • Cam follower • Suction and exhaust valve • Types of distributors • OHC • OHV

5. Crankmechanism • Crankshaft: • It is placed in engine block • Number of bearings at crankshaft determines the number of crankshaft placing • It changes rectilinear movement to rotary one • Crankshaft can be produced by one part or it can be assembled

6. Crankmechanism • Piston rod: • It is placed in piston pins of crankshaft • It transmits forces to crankshaft having the effect to piston • Main parts are: • Eye • Head • Shank

7. Crankmechanism • Piston: • It retains gas pressure made by combustion of inflammable mixture • It is often made of aluminium alloys because it quickly conducts heat • It is designed so that it has minimal heat expansion • Main parts are: • Head • Top • Body

8. Crankmechanism • Piston pin: • It connects piston pin with piston rod • It makes the piston movement possible • Piston rings: • They seal combustion space • They scrape oil of valve sides

9. Enginedistributors • Camshaft: • Shaft is recessed by cam shafts • It is driven by belt or by chain • Ratio between crankshaft and camshaft is 2:1 • The valve movement is controlled by camshaft rotation

10. Enginedistributors • Cam follower, valve rod, rocker arm, suction and exhaust valve:

11. Typesofdistributors • OHV • Camshaft is placed in engine block • Movement is transmitted of camshaft through cam follower by valve rod, rocker arm to valve • Valves are placed in engine head

12. Typesofdistributors • OHC • Camshaft is placed in engine head • Movement is transmitted of camshaft through cam follower directly to valve • Valves are placed in engine head

13. Activity II • Name rotary parts of combustion engines • Explain the meaning of engine piston rod and piston

14. Activity I • Describe these engine parts:

15. Literature • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 1. Brno : Avid, 2004. 211 s. • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 2. Brno : Avid, 2004. 120 s. • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 3. Brno : Avid, 2004. 220 s. • JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří . Automobily 4. Brno : Avid, 2004. 350 s. Translation: • www.seznam.cz • www.slovnik.cz • JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, 2000. ISBN 80-7238-075-3 • Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický. 2010.