Cooling System

Engine cooling system

COOLING SYSTEM

Cooling is a process that work to keep the system cool and to maintain the temperature of an object or system. It is used to remove or absorb the heat from an object and maintain its temperature. In internal combustion engine cooling system is used to maintain the engine temperature and provide the cooling inside the engine by fluid or air. Mainly fluid has used as a coolant because water /coolant has more heat resistance capacity rather than air.

In internal combustion engine for cooling system various parts has used to maintain the temperature like.

Radiator
Coolant reservoir
Viscous fan/Radiator fan
Thermostat valve
Water pump

In internal combustion engine during the starting condition temperature exceed about 100*C within 3-4 minute after start of the engine. So avoid from heat these parts are help in cooling. Most internal combustion engines are fluid cooled using either air (a gaseous fluid) or a liquid coolant run through a heat exchanger (radiator) cooled by air. Marine engines and some stationary engines have ready access to a large volume of water at a suitable temperature.

The water may be used directly to cool the engine, but often has sediment, which can clog coolant passages, or chemicals, such as salt, that can chemically damage the engine. Thus, engine coolant may be run through a heat exchanger that is cooled by the body of water.

How cooling system work in internal combustion engine.

There are two type of combustion in IC engine first is spark ignition engine and second is compression ignition engine. In spark ignition engine combustion happen by the spark plug in which sparks during the compression stroke. Generally this system is used in petrol engine. And in compressed ignition engine combustion happen by the fuel injector.

When engine starts then cooling process start automatically and water pump suck the coolant from radiator lower hose and transfer it to the engine. Coolant keeps moving around inside the engine and then goes back to the engine with thermostat using water pump. This process keep continuously until the temperature reached at 90*C. when temperature exceed about 90*C then thermostat valve open and coolant pass to the radiator through thermostat. Warm coolant come in radiator and it passes slowly from upper side to lower side through the radiator tube. Then coolant gets cool because radiator sucks the air by the radiator fan and provides the cooling. Again coolant goes into the engine by the water pump and this process goes on continuously.

Radiator is a heat exchanger which is used to convert the thermal energy into another form of energy for the purpose of cooling and heating. To cool down the engine, a coolant is passed through the engine block, where it absorbs heat from the engine. The hot coolant is then fed into the inlet tank of the radiator (located either on the top of the radiator, or along one side), from which it is distributed across the radiator core through tubes.

Thermostat valve is used for measuring the temperature of an engine coolant. it is located inside the thermostat housing. Thermostat regulate the temperature of the engine cooling water (jacket water) when the engine is in operation. The thermostat allows the engine to heat-up quickly when cold and maintain a desired temperature once the desired temperature has been reached. Thermostats are installed on many water cooled internal combustion (IC) engines, both four strokes and two strokes.

Milan Tomic

Hi. I’m Designer of Blog Magic. I’m CEO/Founder of ThemeXpose. I’m Creative Art Director, Web Designer, UI/UX Designer, Interaction Designer, Industrial Designer, Web Developer, Business Enthusiast, StartUp Enthusiast, Speaker, Writer and Photographer. Inspired to make things looks better.