How Engine Cooling System Works: Radiator, Water pump, Thermostat, PDF

Amrit Kumar Automobile Engineering Leave a Comment

Time to Read: 3 minutes

How the engine cooling system works:

In detail, we will study, what is an Engine Cooling System? and How it works? and Application, Advantages, and Dis-advantages. Let’s begin:

Engine Cooling System:

Basically, this System, in a vehicle, is used to keep the engine cool and also keep engine temperature warm enough to ensure efficient, clean operation.

Because of this System, In a vehicle, less wear and tear take place (When engine’s temperature is high wear and tear occurs and when engine temperature low, very less wear and tear occurs).

The Main Components of an Engine Cooling System of any Vehicles can be described as

Water Pump, Radiator Reservoir Tank, Thermostat, etc

When the piston moves up and down in the engine cylinder due to the pressure created by the gases formed as a result of burning air-fuel mixture.

And having water vents along the length of the engine cylinder in the engine block,

and these vents circulate through the engine head and remove the heat, with flowing water from the engines.

The water pump inlet and outlet are connected to the engine with the help of rubber hoses.

We have thermostat mounted in a path of outlet to the engine, so water is pumped by this radial-pump through thermostat into the engine.

Water vents, the thermostat does not allow the water to go into the radiator circuit until the engine is at low temperature, and water comes back to the pump through the outlet hose.

A coolant temperature sensor is mounted just near the thermostat.

As water keeps on circulating, it extracts heat from the engine and its temperature rises.

As it reaches a temperature between 160 to 190°F, it melts the paraffin wax in the thermostat and opens it up.

So now this hot water is circulated through a radiator circuit.

1. Water Pump:

This is said to be the heart of an engine cooling system.

The water pump has a radial impeller inside its casing which is driven by the engine itself.

The serpentine belt is used to deliver the rotational motion of the engine and main pulley to the water pump pulley.

2. Radiator:

The radiator acts as a heat exchanger for an engine.

It is usually made up of aluminum, and have lots of small diameter pipes with fins mounted on them.

It exchanges the heat of hot water coming from an engine with the surrounding air.

This also has an inlet port, outlet port, drain plug, and a pressure cap.

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3. Thermostat:

It is the thermostat that acts as a valve for coolant and allows it to flow through the radiator only after exceeding a particular temperature value.

The thermostat has paraffin wax in it which expands at a particular temperature and opens it up at that temperature.

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About the Author

Amrit Kumar

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Amrit is a Co-founder of Learn Mechanical Portal (Previously owned "Engramritkumar.com"). He completed his diploma in Mechanical Engineering from Acharya Polytechnic Bangalore and also completed his B-Tech from Delhi. Amrit is now preparing for Govt. exams. If you need help, you can ask him regarding any suggestions in the mechanical engineering field. He loves to meet new people.

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