4JJ1 Used Engine Assembly For Excavator ZX120 - 5A Water Cooling
Specification
| Car name: Complete Engine |
| Model Number: 4JJ1 |
| Cylinder stroke: 105 |
| Application: Excavator |
| Cylinder diameter: 95 |
| valve: 16 valve |
| Cooling: Water cooling |
| Output: 69kw |
| Injection: Electric |
| Cylinders of number: 4 |
Description
There are two Types of Engine Cooling System; there are two types
of cooling systems:
Air Cooling System
Liquid - Cooling system
The Air Cooling System
Found mostly in older cars and motorcycles, an air-cooled system is
where the engine block is covered in aluminium fins that conduct
the heat away from the cylinder. A powerful fan forces air over
these fins, which cools the engine by transferring the heat to the
air.The amount of heat reduced by the air-cooling depends upon
factors such as factors; the total area of the fin surfaces, the
velocity / amount of the cooling air and also the temperature of
the fins as well as the cooling air. Air-cooling is mostly used in
less horsepower engines like, motorcycles, scooters, small cars and
small aircraft engines where the forward motion of the machine
gives good velocity to cool the engine. Air-cooling is also
provided in some small industrial engines.
The Advantages of an Air Cooled System:
They are cheaper to manufacture. They need less care and
maintenance. The design of air-cooled engine is simple. They are
lighter in weight than liquid - cooled engines due to the absence
of water jackets, radiator, circulating pump and the weight of the
cooling water. This system of cooling is particularly advantageous
where there are extreme climatic conditions in the arctic or where
the evaporation factor of liquids is higher- deserts. There is no
risk of damage from frost, such as cracking of cylinder jackets or
radiator water tubes.
Liquid Cooling System:
The liquid cooled systems are the ones that are used the most these
days. In an automotive with
Liquid Cooling System, the heat is carried away by the use of a
heat absorbing coolant that circulates
through the engine, especially around the combustion chamber in the
cylinder head area of the
engine block.
