Engine Cooling and Lubrication System | Cooling System of Engine | Cooling System in Hindi | NCL

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The cooling system has four primary functions. These functions are as follows:
1. Remove excess heat from the engine.
2. Maintain a constant engine operating temperature.
3. Increase the temperature of a cold engine as quickly as possible.
4. Provide a means for heater operation (warming the passenger compartment).
Types of cooling system:
The different Types of cooling system are
1. air cooling system
2. liquid cooling system
3. forced circulation system
4. pressure cooling system
Air-Cooled System :
The simplest type of cooling is the air-cooled, or direct, method in which the heat is drawn off by moving air in direct contact with the engine Several fundamental principles of cooling are embodied in this type of engine cooling. The rate of the cooling is dependent upon the following:
1. The area exposed to the cooling medium
2. The heat conductivity of the metal used & the volume of the metal or its size in cross section
3. The amount of air flowing over the heated surfaces
4. The difference in temperature between the exposed metal surfaces and the cooling air
LIQUID-COOLED SYSTEM
Nearly all multicylinder engines used in automotive, construction, and material-handling equipment use a liquid-cooled system. Any liquid used in this type of system is called a COOLANT.
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