Engine- Functions Of Important Parts In Internal Combustion Engine.

Internal combustion engines are made from various parts.Each part has its own location and function for proper working of engine.Some important parts and its function is as described below. It is most essential to know right information from engineering person.

01) Cylinder Block

Function- In the bore of cylinder the fresh charge of air-fuel mixture is ignited,compressed by piston and expanded to give power to piston.

02) Cylinder Head

Function-It carries inlet and exhaust valve.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

Function-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

Function-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

Function-It changes the reciprocating motion of piston into rotary motion at crankshaft.This way connecting rod transmits the power produced at piston to crankshaft.

06) Gudgeon Pin

Function-Connects the piston with small end of connecting rod.

07) Crank Pin

Function-hand over the power and motion to the crankshaft which come from piston through connecting rod.

08) Crank Shaft

Function-Receives oscillating motion from connecting rod and gives a rotary motion to the main shaft.It also drives the camshaft which actuate the valves of the engine.

09) Cam Shaft

Function-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

Function-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.

11) Governor

Function-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.

12) Carburettor

Function-It converts petrol in fine spray and mixes with air in proper ratio as per requirement of the engine.

13) Fuel Pump

Function-This device supply the petrol to the carburettor sucking from the fuel tank.

14) Spark Plug

Function-This device is used in petrol engine only and ignite the charge of fuel for combustion.

15) Fuel Injector

Function-This device is used in diesel engine only and delivers fuel in fine spray under pressure.

I hope,above information will help you something about your vehicle's engine.

For more,please visit



More by this Author

Comments 89 comments

Mannny 7 years ago

Hey im doing a social studies project for college.... do you know why the internal combustion engine is important??? please answer quickly

abi thomas 7 years ago

my name is thomas i want to no more on automobil engine and also to learn

tolits 7 years ago


muwanguzi jose 7 years ago

l also went to lean more about engines and there ways of functioning

iam in uganda (muwanguzijoseph68@yahoo.com

pitogo ronald richie A. 6 years ago

the internal combustion is important because this is the one of the most important parts of an engine because it is use to the expansion of the high temperature and pressure gasses, which are produced by combustion dirrect applies force to component of the engine such as piston or turbize bladders or a nozzles

diesel engine parts 6 years ago

Excellent definitions above. For additional diesel engine parts go to http://www.partznetwork.com

abdul alli  6 years ago

thanks a lot from the note i really like it but some parts are missing in this like bearing and sidecovers breather and cb point

fortunato 6 years ago

thanks im doin a cert II in auto and this is helping a lot

prasannasutrave profile image

prasannasutrave 6 years ago from mumbai( india ) Author

Thanks a lot for nice comments.

ogweno cosmas 6 years ago

your research is reccomendable and keep it up

bigriz 6 years ago

very good info helped me a lot

tom 6 years ago

ver good information

elei 6 years ago

someone tel me if why we need fuel to make the engine in our car moved? while we know that it cause of danger like pollution.

Farhana 6 years ago

thanks.let me know about the fuction of crankshaft gear.

sharif 5 years ago

not enough information

Ahmed sakr 5 years ago

really, Very nice

Diego 5 years ago

its realy very nice and useful for me i am working in automobile industry as a technician

Emma 5 years ago

Thanks 4 d information. I want 2 know what is d value timing of a diesesl engine

Chetan  5 years ago

Thanx....its a very very useful for me..!

Godlisten Philipo 5 years ago

I have learnt more through this forum .Thanks a lot

mahesh dhompare 5 years ago

meaningfull defination. But material used for every part is not given.

sandeep Gadekar 5 years ago

Very nice its use to increase our knowledge

vk 5 years ago

thanx a lot.....

ericson 5 years ago

Im a maritime student researching all about diesel engine and it helps me a lot....

thank you.....

jamsheed ap 5 years ago

thanks alone......

sobir 5 years ago

nice easy to understand much better

Ranjit G 5 years ago

Very Nice information for easy to understand.

Vikas 5 years ago

nice one.....it helped a lot

jayson 5 years ago


Hi i am prashantha reddyt 5 years ago

Thankss for infarmation

roel 5 years ago

whose the author of this?

vincent oriel villaruz 5 years ago

thank you so much .., God bless you

vijay 5 years ago

i don't understant

sakthi 5 years ago

very nice

Mildred 5 years ago

Wow eeeverything is nice eventhough i have just started to study about da automobile i op i like it.

C.Abish 5 years ago

i am abish.i complete diplomo in auto mobile engineering.but i read in automobile books not understand.i read this information now easily understad that. so thanks for give this information

khalid 5 years ago

very nice thank you a lot if you can give me information about cooling and lubrication system

FyneJay 5 years ago

Dat was good but if any reader want to get more from an experienced person,text me on mailjoemarine@yahoo.com.

sumibare 5 years ago

i am student still in secondary school and i want to be an engineer (mechanical)please can u explain how engine works or give me me the idea to some project i can practice.

Help. 5 years ago

What is the most important part of an internal combustion engine?

armando robete jr. 5 years ago

im a college student of MSU-TCTO and i want to know what and why engineering is important. and what are the possible factors can urge me in that kind of course.

jewel 4 years ago

i feel want of image

hemant misra 4 years ago

this short summary is nice but if image is provide then it will be best

OGWEZI EMEKE 4 years ago

AM carring a thesis research on steady state combustion temperature distribution in cylinder of compression ignition engine,and if you are the examiner what could be your question of interest on the said research topic above,please help by giving a constructive idea. here is my email address:ogweziemeke@yahoo.com

emmanuel oludare 4 years ago

pls i am doing a research on how to reduce the heat generated in the internal combusion engine.please this is my email: omolemoy@yahoo.com.thanks please i need your assistance.bye

rimal wilang 4 years ago

actually, where did u research about internal parts of a diesel, can you please give me some tips where to find it sir.thanks.

Adam maajin 4 years ago

I realy appriciate to know more of piston rings

casian sam 4 years ago

are carburetors still being used today? don't most cars nowadays benefit from fuel injection? im not sure but i thought it was more economical aswell. tell me if im wrong

mathan 4 years ago

it is very nice& very usefull for my studyies

CALVIN BARLEY 4 years ago

"wow" its great to see da functions of each engine components on dis website, i like it... tankz very much

ashish kumar 4 years ago

good work

Deniel 4 years ago

i think images are also required...but it helped me a lot...thanks...

Aakash 4 years ago

good information in short

but image is imporatatnt i think ..........

Paulo 4 years ago

THANKS FOR THIS PAGE IT HELPS ME A LOT IN MY SUBJECT MARINE POWER PLANT-1,I'm a 3rd year student taking up marine engineering. I hope you will give us a specific parts and usage of a marine diesel engine. thanks again!

ahmedmustafa1241@hotmail.com 4 years ago

good information

bosstee 4 years ago

i wnt to no the pratical aspect

D.PARANTHAMAN 4 years ago


R.Siva 4 years ago

I'm studying BE mechanical engineering .....i want 2 knw more visual images from ths site because it is the easy way understand it ......

4 years ago

very good information and in a very simple language

samadhi 4 years ago

Good..,but it is better,if u added with images and also,where that parts placed correctly in the engine.

jonh kennethe 4 years ago

good.,.,.,it can helps in my interview

pogi 4 years ago

thanks for this website..its help me to my projects

Umakant 4 years ago

I want the detail information about jet engine of aircraft

GHANA BOI 4 years ago


Arun Sharma 3 years ago

Its a dicent information about discel engine and petrol engine.I appriciate the author Mr. Prasannasutrave .

stev 3 years ago

thanks a lot

roy galvez 3 years ago

why we need to cool the air before coming to main engine? need to reply asap

12345678 3 years ago


narfi MU chipolopolo 3 years ago

i have enjoyed the simplification of the function analysis for an internal combustion engine....zikomo

im michael 3 years ago

im a student of asian institute of maritime studies i need some more parts and function of internal combustion engine sir can you help me sir? for power 1 subject porpuse only

tem lucas 2 years ago

dear sir i am very happy for the intensive information that you have given me please sir i need a help. i play the rule as a gratitude graduate from marine training college.profession mechanic engineering i do not have a job so please help me

Yousa Khan 2 years ago

Heyy i am mechanical Engineer. There's a question of Someone that how crankshaft Work?

Ans: Crank shaft receives oscillating motion from conecting rod & gives a rotating motion to the main shaft. It also drives the cam shaft which actuate the valves of the Engine.

Bdax Kedah 2 years ago

thank a lot

2 years ago

very useful

sg 2 years ago

They should involve more and more image

ramesh 2 years ago

Good imformation

muthu raj.m 2 years ago

I am iti mech stu continu automopile eng engine parts easy my eng so thanking u...

جمال وناصر 2 years ago

يا ملا العافيه

thank you so much

veyilrajan 2 years ago

it is useful

G.VEYILRAJAN B.E(Mechanical engineer) 2 years ago

il is very usful.

so thanks

S.SARAVANAKUMAR B.E (Mechanical engineering) (india,tamilnadu,pariyour) 2 years ago

it is useful.


M.saktheeswaran 2 years ago

Very super intertest topic

M.saktheeswaran B.E(mechanical) 2 years ago


Sanjib Dey 2 years ago

a tata ACE-Ht vehicle complain are

1.Bblack smoke

2.Exess mobil consumption

3.Low pick-Up

please advise, what step should I do to resolve the complain.How can I repaire the same.

Sanjib Dey 2 years ago

a tata ACE-Ht vehicle complain are

1.Bblack smoke

2.Exess mobil consumption

3.Low pick-Up

please advise, what step should I do to resolve the complain.How can I repaire the same.

Shubham mehra 22 months ago

thankyou so much

ashley 22 months ago

kulang parts new..?

peter zulu 22 months ago

pliz how can i study to pass my course am doing agriculture engineering and i have difficulties in my studies

suraj bemal 16 months ago

Great stuff guyzzzzzzz!!!!!!!!!

    Sign in or sign up and post using a HubPages Network account.

    0 of 8192 characters used
    Post Comment

    No HTML is allowed in comments, but URLs will be hyperlinked. Comments are not for promoting your articles or other sites.

    Click to Rate This Article