Volume 03 Issue 05-2023
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International Journal of Advance Scientific Research
(ISSN
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2750-1396)
VOLUME
03
ISSUE
05
Pages:
19-26
SJIF
I
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FACTOR
(2021:
5.478
)
(2022:
5.636
)
(2023:
6.741
)
OCLC
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1368736135
A
BSTRACT
We know that in all internal combustion engines it is used in the cooling system. In this article, we examined
the definition and analysis of the main indicators of the cooling system with a decrease in the thermal load
of gas engines.
K
EYWORDS
Car, bus, transport, system, cooling system, gas, engines, air, ring, thermostat, liquid, antifreeze.
I
NTRODUCTION
Cooling through a small loop
In the scheme of the internal combustion engine
cooling system, there are two circuits - small and
large. It is similar to human anatomy - blood flow
in the div. The liquid moves around a small
circle when it needs to heat up the temperature
quickly. The problem is that the engine can
usually work normally in a narrow temperature
range - about 90 degrees [1-4].
It cannot be raised because it would cause
violations,fuel mixtureIt still burns. The fog
contains the radiator of the cabin heater - after
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Website:
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Copyright:
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4.0 licence.
Research Article
DETERMINATION OF THE MAIN PARAMETERS OF THE
COOLING SYSTEM WITH A DECREASE IN THE THERMAL
LOAD OF GAS ENGINES
Submission Date:
May 03, 2023,
Accepted Date:
May 08, 2023,
Published Date:
May 13, 2023
Crossref doi:
https://doi.org/10.37547/ijasr-03-05-03
Tursunali Nishanov
Assistant, Fergana Polytechnic Institute, Fergana, Uzbekistan
Sardor Khujamqulov
Assistant, Fergana Polytechnic Institute, Fergana, Uzbekistan
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Pages:
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5.478
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that it should be as warm as possible in the car.
The hot antefreeze is combined with the faucet.
The place of installation depends on a particular
car - in the cabin anddo not have a motor, in the
field of gloves, etc [5-9].
Cooling through a large loop
In this case, the main radiator is also included. It
is installed on the front of the car and is designed
for an emergency decrease in the temperature of
the liquid in the engine. If the car has an air
conditioner, then the radiator is installed nearby.
Volga and Gazelle cars use an oil radiator, which
is placed at the front of the car [10-17].
Thermostat and its features
It is difficult to say which element provides the
most efficient circulation of liquid in the cooling
system. On the one hand, the pump creates
pressure and moves in the pipes with the help of
antifreeze.
Figure 1. Details and elements of the cooling system.
1-radiator; 2-liquid pump; 3-thermostat; 4-electronic fan;
5-fan temperature sensor; 6- hoses (pipe) connecting the engine and radiator; 7-antifreeze;
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On the other hand, if there is no thermostat, the
action takes place only in a small circle. So let's
look at the thermostat. The meaning of the word
thermostat ("thermo - temperature", "stat -
suspended, at a standard") means to hold the
temperature at a standard. In car engines, this is
an automatic valve, which, when running a cold
engine, allows it to warm up quickly, adjusts the
amount of liquid passing through the radiator,
and serves to maintain the optimal temperature
in the cooling system. In car engines, liquid and
solid filler thermostats are used [18-30].
Running the cooling system is preheating. When
the outside temperature is below -20
℃
, it
becomes difficult to run any internal combustion
engine. Therefore, the cooling system is heated
before starting the engine. When the combustible
mixture burns steadily in the boiler, the candle is
disconnected. Hot air is sent to the cooling system
and the liquid is heated. Advantages and
disadvantages of liquid and air cooling systems
[31-39]. A liquid cooling system has the following
advantages over air cooling:
a)
due to the boiling temperature of the
liquid used is 100-110
℃
, the engine parts
do not overheat;
b)
the liquid partially absorbs the sound of
the engine;
c)
the engine heats up faster when driving;
d)
the structure of the cooling system is
smooth and compact. The advantages of
the air cooling system are as follows:
•
it is simple and light, since there is no liquid
pump, radiator, water pipe, thermostat in the
system;
•
since the engine does not have a liquid casing,
it does not freeze;
•
the engine can also be used in places where
there is no water.
Limit temperature of the main parts of the engine
Table 1.
Engine details
Threshold temperature
°K
°C
Wall of cylinders
383...453
110...180
The inner surface of the
cylinder head
423...533
150...260
Piston bottom
- if it is made of cast iron
- in case of aluminum alloy
673...773
523...673
400...500
250...400
Intake valve plate
573...673
300...400
Exhaust valve plate
873...1073
600...800
The main disadvantage of the liquid cooling
system is that water freezes at 0
℃
, forming
cracks in the block and block head. Deposits form
in the water jackets of the block, the radiator
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tubes can be filled with deposits [40-58]. The
main disadvantage of air cooling is that:
a)
when the outside air temperature exceeds
30
℃
, the engine will overheat;
b)
cylinder ribs are contaminated with dust;
c)
the fan bearing will fail quickly.
The lower limit of the quoted temperature is
specified for liquid-cooled engines, and the upper
limit is specified for air-cooled engines. So, in
order for the engines to work normally, the
economic and power indicators to be in the
specified amount, and the mechanical indicators
of the parts not to decrease, it is necessary not to
let the temperature of the parts and the engine
rise above the specified amount. For this, a
cooling system is used in all piston engines. The
function of the cooling system is to maintain the
temperature of the engine and its parts at a
normal level by absorbing the temperature from
the heated parts and transferring it to the
atmosphere.
Depending on the means of heat transfer to the
atmosphere, engines are of two types.
1. Engines with a liquid cooling system.
2. Engines with air cooling system.
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