This document provides an overview of an internal combustion engine demonstration presented by the Mechanical Department at GEETANJALI INSTITUTE OF TECHNICAL STUDIES. It defines internal combustion engines and heat engines, describes the main types of combustion engines as internal or external. It then outlines the key components of an internal combustion engine, such as the piston, crankshaft, connecting rod, and camshaft. Finally, it explains the four stroke cycles of spark ignition and compression ignition engines through diagrams and descriptions of the suction, compression, expansion, and exhaust strokes.

1. GEETANJALI INSTITUTE OF TECHNICAL STUDIES
A Presentation
on
Demonstration of INTERNAL
COMBUSTION ENGINE
Guided by :-
Mechanical Department
Approved by :-
Prof. Vishnu Agarwal
HOD,Mechanical
Team :- Kapil Vadiyar
Jayesh Sharma
DEPARTMENT OF MECHANICAL ENGINEERING

2. ABSTRACT
The purpose of this Presentation is to make familiar
with “ INTERNAL COMBUSTION ENGINE”. The
whole report is prepared after deep studying of
Automobile IC-ENGINE. Since many books are
available regarding to this but this Presentation is
very helpful for our Knowledge purpose.

3. INTRODUCTION:
=
•Heat engine : It can be defined as any
engine that converts thermal energy to
mechanical work output. Examples of heat
engines include: steam engine, diesel
engine, and gasoline (petrol) engine.

4. TYPES OF COMBUSTION ENGINE
• In an Internal combustion engine, combustion takes place
within working fluid of the engine, thus fluid gets contaminated
with combustion products.
 Example : Petrol engine
• In an External combustion engine, working fluid gets energy
using boilers by burning fossil fuels or any other fuel, thus the
working fluid does not come in contact with combustion
products.
 Example: Steam engine

5. IC-ENGINES MAY BE CLASSIFIED AS :
Spark Ignition engines(SI).
Compression Ignition engines(CI).
Spark ignition and Compression Ignition
engine operate on either a four stroke cycle
or a two stroke cycle.

6. PARTS OF IC- ENGINE:

7. Internal combustion Engine Components:
Block
Cylinder

8. Head
Crank Shaft

9. Connecting Rod
Piston Ring

10. Push Rod
Crank case Cam Shaft

11. I.C. Engine components apart from Engine
shown in the figure:
Flywheel
Fuel Injector

12.  Fuel PumpCarburetor
 Spark plug

13. Engine Terminology :
 Top Dead Center (TDC)
 Bottom Dead Center (BDC)
 Bore
 Stroke
 Swept Volume
 Clearance Volume(CC)
 Compression Ratio

14. SI Engine Ideal Otto Cycle:

15. FOUR STROKE PETROL ENGINE (SI)
Suction Stroke
Compression Stroke
Expansion Stroke (Power Stroke)
Exhaust Stroke

16. FIGURE: SUCTION STROKE

17. FIGURE: COMPRESSION STROKE

18. FIGURE: COMBUSTION FOLLOWED BY EXPANSION STROKE.

19. FIGURE : EXHAUST STROKE

20. COMPRESSION IGNITION ENGINE :
Suction Stroke
Compression Stroke
Expansion Stroke
Exhaust Stroke

21. FIGURE:SUCTION STROKE FIGURE: COMPRESSION STROKE

22. FIGURE: EXPANSION STROKE FIGURE: EXHAUST STROKE

24. We are grateful to “Mechanical Department” for his
valuable guidance and assessment.
“Thank you”