Tutorial: Physics Topic : Moving parts of combustion engine Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/ je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
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
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
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
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
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
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
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
Cam follower, valve rod, rocker arm, suction and exhaust valve:
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
OHC Camshaft is placed in engine head Movement is transmitted of camshaft through cam follower directly to valve Valves are placed in engine head
Name rotary parts of combustion engines Explain the meaning of engine piston rod and piston
Describe these engine parts:
JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 1. Brno : Avid, s. JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 2. Brno : Avid, s. JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 3. Brno : Avid, s. JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 4. Brno : Avid, s. Translation: JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, ISBN Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický