Engine Cooling System is a system that controls the engine temperature, is known as a cooling system. For more details give below:-

1. AUTOMOTIVE
COOLING SYSTEM

2. CONTENTS
 Cooling System
 Need Of Cooling System
 Types of cooling system
 Water Cooled System.
• Water Jackets
• Water Pump
• Fan
• Thermostat
• Radiator
• Coolant Recovery Tank
 Air Cooled System
• Cooling Fins
• Baffles
 Advantages & Disadvantages of liquid
Cooling System
 Advantages & Disadvantages of air
Cooling System
 Conclusions
 References

3. COOLING SYSTEM
 An automobile's cooling system is the collection of parts and substances (coolants) that work together to maintain the
engine's temperature at optimal levels. Comprising many different components such as water pump, coolant, a thermostat
etc. the system enables smooth and efficient functioning of the engine at the same time protecting it from damage.
 An automotive cooling system must perform several functions-
1. Remove excess from the engine.
2. Maintain a consist engine temperature

4.  To Get the engine up to optimum operating temperature as quickly as possible and maintains it at that temperature.
 To Controls the heat produced in combustion chamber, so that the engine parts are not damaged & the oil does not
break down.
 The temperature of component must be maintained within certain limit in order to obtain maximum performance of
engine.
 The Adequate cooling system is then a fundamental requirement associated with reciprocating I.C. Engine.
NEED OF COOLING SYSTEM

5. TYPES OF COOLING SYSTEM
 In order to cool the engine a cooling medium is required. On the basis of medium ,in general use for cooling
I.C. engine ,types of cooling system are:-
 Liquid or indirect cooling system.
 Air or direct cooling system.

6. WATER COOLED SYSTEM
 A liquid is circulated around the cylinders and absorb heat from the
cylinder walls and cylinder head.
 Coolant absorbs heat as it passes through the engine and also lubricates
the water pump.
 Hot coolant enters the radiator in which the heat is passed on to air that is
flowing through the radiator.

8. WATER JACKETS
 It designed to keep engine block and cylinder head cool.
 It Open spaces between the outside of cylinder and inside
of cylinder block and head.
 When engine is running at normal operating temperature,
the coolant is forced through the water jackets in the
engine block, through the head gasket, into the head, and
back to the radiator.

9. WATER PUMP
 To draws the coolant from the radiator, through the lower radiator
hose, and then forces it through the water jackets, back into the
radiator.
 If the clutch fan can be wiggled up and down, most likely the water
pump Needs to be replaced.
 Water pumps gasket is placed between the water pump and the engine
block to prevent leakage 9if left loose it might leak and if tightened
too much it might crack).

10. FAN
 The fan is mounted on the impeller spindle driven
by a suitable belt pulley arrangement.
 Fan draws air through the radiator at low speeds.

11. THERMOSTAT
 Thermostat placed between the cylinder head
and top radiator hose.
 The temperature that the thermostat opens is
called thermostat rating.
 The thermostat's main job is to allow the engine
to heat up quickly, and then to keep the engine
at a constant temperature

12. RADIATER
 Radiator is a heat exchanger that removes heat from the
coolant passing through it.
 Vehicles equipped with automatic transmission have
transmission cooler build into the radiator.
 The purpose of radiator is to provide a large amount of
cooling surface area so that water passing downward
through it in thin stream is cooled efficiently.

13. COOLANT RECOVERY TANK
 Keeps the coolant level full in the system at all
times. Works in conjunction with the radiator cap.
 When the engine heats up the coolant expands and
flows to the recovery tank.
 When the engine coolant the coolant contracts and
creates a vacuum and draws the fluid back into the
radiator.
 Reduces air in system Reduces rust.
 Less need to open radiator

14. AIR COOLED SYSTEM
 In air cooled system a current of air made to flow past the outside of the cylinder barrel
,outer surface area which has been considerably increased by providing cooling fins.
 The amount of heat dissipated to air depends upon :
(a) Amount of air flowing through the fins.
(b) Fin surface area.
(c) Thermal conductivity of metal used for fins

15. COOLING FINS
 In the study of heat transfer, a fin is a surface that
extends from an object to increase the rate of heat
transfer to or from the environment by increasing
convection.
 The amount of conduction, convection, or radiation
of an object determines the amount of heat it
transfers.
 Increasing the temperature difference between the
object and the environment, increasing the
convection heat transfer coefficient , or increasing
the surface area of the object increases the heat
transfer.

16. BAFFLES
 The rate of heat transfer from the cylinder
walls can be substantially increased by using
baffles which force the air through the space
between the fins.

17. ADVANTAGE & DISADVANTAGE OF LIQUID
COOLING SYSTEM
 Advantages:-
(a) Uniform cooling of cylinder, cylinder head and valves.
(b) Specific fuel consumption of engine improves by using water cooling system.
(c) If we employ water cooling system, then engine need not be provided at the front end of moving vehicle.
(d) Engine is less noisy as compared with air cooled engines, as it has water for damping noise.
 Disadvantages:-
(a) It depends upon the supply of water.
(b) The water pump which circulates water absorbs considerable power.
(c) If the water cooling system fails then it will result in severe damage of engine.
(d) The water cooling system is costlier as it has more number of parts. Also it requires more maintenance and care for its
parts.

18. ADVANTAGES AND DISADVANTAGES OF AIR
COOLING SYSTEM
 Advantages:-
(a) Radiator/pump is absent hence the system is light.
(b) In case of water cooling system there are leakages, but in this case here are no leakages.
(c) Coolant and antifreeze solutions are not required.
(d) This system can be used in cold climates, where if water is used it may freeze.
 Disadvantages:-
(a) Comparatively it is less efficient.
(b) It is used in aero planes and motorcycle engines where the engines are exposed to air directly.

19. CONCLUSIONS
 A cooling system must be provided not only to prevent damage to the vital parts of the engine (due to
high temperature), but the temperature of these components must be maintained within certain limits
in order to obtain maximum performance from the engine.

20. REFERENCES
 http://www.bancoindia.com/wp-content/uploads/2017/06/automotive-ecs-introdution.pdf
 http://www.ignou.ac.in/upload/unit%205.pdf
 R.K Rajput’s A Text Book Of Automobile Engineering
 M.F. Basar, M. Musa, M.Y. Faizal, N.H.A. Razik, Alternative Way in Reducing Car Cabin Temperature Using
Portable Car Cooling System
 Gogineni. Prudhvi, Gada.Vinay, G.Suresh Babu,Cooling Systems in Automobiles & Cars
 AbhishekSaini Indian Institute of Technology, Patna, Advance Engine Cooling System.
 V. Ganeshan, internal combustion engine.
 Rajput, R. K. Heat And Mass Transfer (5th Edition). S.Chand, New Delhi, 1999.

21. THANK YOU