Sunday, January 23, 2011

Function of Parts

Parts in alphabetical order.

No.
Parts
Definition/Function
1
Connecting Rod
·         Changes the reciprocating motion of piston into rotary motion at crankshaft
·         Transmits the power produced at piston to crankshaft
2
Cylinder Block
·         Holds engine component (pistons, cylinders, camshaft and oil pump)
·         Hold crankshaft that converts rotating motion to reciprocating motion
3
Cylinder Head
(4-stroke)
·         Carries inlet and exhaust valve.
·         An injector is also mounted on cylinder head
4





Cylinder Liner
·         Forms a sliding surface for the piston rings while retaining the lubricant within
·         Receives combustion heat through the piston and piston rings and transmits the heat to the coolant.
·         Prevents the compressed gas and combustion gas from escaping
5
Crank Pin
·         Transfer  power and motion to the crank shaft which come from piston through connecting rod
6
Crank Shaft
·         Receives oscillating motion from connecting rod and gives a rotary motion to the main shaft.
·         Drives the camshaft which actuate the valves of the engine
7
Cam Shaft
·         Takes driving force from crankshaft through gear chain
·         Operates the inlet and exhaust valve with the help of cam followers,push rod and rocker arms
8
Crosshead
·         A beam that connects the piston rod to the connecting rod
9
Crosshead Guide
·         Allowing the crosshead to only move in the same direction as the piston travel
10
Fuel Injector
·         Delivers fuel in fine spray under pressure
11
Fuel Pump
·         Deliver metered amount of fuel into cylinder through fuel delivery pipe & fuel injector
12
Inlet Valve & Exhaust Valve
(4-stroke)
·         Inlet valve allow the fresh charge of air-fuel mixture to enter the cylinder bore
·         Exhaust valve permits the burnt gases to escape from the cylinder bore at proper timing
13
Gudgeon Pin
(4-Stroke)
·         Connects the piston with small end of connecting rod.
14
Governor
·         Controls the speed of engine at a different load by regulating fuel supply in diesel engine.
15
Piston Rings
·         Prevents the compressed charge of fuel-air mixture from leaking to the other side of the piston.
·         Oil rings used for removing lubricating oil from the cylinder after lubrication.
·         Prevents the excess oil to mix with charge.
16
Piston Skirt
·         Carries gudgeon pin and rub against liner.
17
Push rod & Rocker arm (4-stroke)
·         Push rods sit on the cam so when engine is running
·         Push rods go up and down in a timed sequence and with the rocker arms, open and close the inlet and exhaust valves.
18
Piston
·         Compresses air in between cylinder head and piston crown.
19
Scavenge Ports
(2-stroke)
·         Pushes exhausted gas-charge out of the cylinder
·         Draw in a fresh draught of air ready for the next cycle.
20
Stuffing Box
·         A type of seal that prevents fluids from leaking inside of machine parts.
21
Turbocharger
·         A device that uses the energy of exhaust gases coming out from an engine to compress the air going into the engine.

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