Parts: Internal Combustion Engine Parts

(Last Updated On: 05/07/2017)
Internal combustion engines are made from various parts such as ,Cylinder Block,Piston,Piston Rings,Connecting Rod,Carburetor,Fuel Pump,Crank Shaft
Are you an engineering student or concerned with an engine? Will your interest to know more about parts of a car engine? YES, then this article is for you only. The information below for education of you in terms of parts of I.C Engine. Internal combustion engines are made from various parts. Each part has its own location and function for the proper working of the engine. The details about each and every parts will be covered in coming posts.

  The function of parts used in Internal Combustion Engine.  


01) Cylinder Block

This is the major casting part of engine. In the bore of cylinder the fresh charge of airfuel mixture is ignited, compressed by piston and expanded to give power to piston to work further. Fins are provided in air cooled engine to cool the cylinder block where as in water cooled engine, water jackets are provided.
02) Cylinder Head
To close cylinder block from top and bottom (Where ever required), the casting part, known as cylinder head is used. It carries inlet and exhaustvalve. Fresh charge is admitted through inlet valve and burnt gases are exhausted from exhaust valve. In case of petrol engine, a spark plug and in case of diesel engine, an injector is also mounted on cylinder head.
03) Piston
This part is moving inside cylinder bore and made from cast iron, aluminum or as per requirement. During suction stroke, it sucks the fresh charge of air-fuel mixture through inlet valve and compresses during the compression stroke inside the cylinder. This way piston receives power from the expanding gases after ignition in cylinder. Also forces the burnt exhaust gases out of the cylinder through exhaust valve.
04) Piston Rings
These rings are made from cast iron. Quantity and size of rings are decided by capacity of engine. It prevents the compressed charge of fuel-air mixture from leaking to the other side of the piston. Oil rings, is used for removing lubricating oil from the cylinder after lubrication. This ring prevents the excess oil to mix with charge.
05) Connecting Rod
This is casting part made from cast iron. It has two ends one is big end and another is small end. It changes thereciprocating motion of piston into rotary motion at crankshaft. This way connecting rod transmits the power produced at piston to crankshaft.
06) Gudgeon Pin
This part is made from steel and connects the piston with small end of connecting rod.
This is casting and machining parts made from cast iron receives oscillating motion from connecting rod and gives a rotary motion to the main shaft. It also drives the camshaft which actuates the valves of the engine.
08) Crank Pin
Big End Bearings are fitted on crank pin which hand over the power and motion to the crank shaft which comes from piston through connecting rod.
09) Cam Shaft
It takes driving force from crankshaft through gear train or chain and operates the inlet valve as well as exhaust valve with the help of cam followers, push rod and rocker arms.
10) Inlet Valve & Exhaust Valve
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. The type, size and quantity, varies from model to model up onrequirement.
11) Governor
As name indicates, it controls the speed of engine by controlling the fuel supply. It controls the speed of engine at a different load by regulating fuel supply in diesel engine. In petrol engine, supplying the mixture of air-petrol and controlling the speed at various load condition.
This is a small but very important part of engine. It converts petrol in fine spray and mixes with air in proper ratio as per requirement of the engine. The working life and performance of engine is mostly depending on carburetor.
13) Fuel Pump
An important part of fuel supply system who supplies the petrol to the carburetor sucking from the fuel tank.
This device is used in petrol engine only and ignites the charge of fuel for combustion.
15) Fuel Injector
This device is used in diesel engine only and delivers fuel in fine spray under pressure.
There are many other small parts are used in the engine. If you know to add it to comments.
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