Today we will discuss all main Difference Between Petrol Engine and Diesel Engine. We all love driving. We all
have heard about the diesel engine and petrol engine. But most of us only know
that the difference between both engine is that one is run by petrol and the
other one is by diesel. But after this many question develop in our mind.
1. If the diesel is cheaper than
petrol, then why we make petrol engine vehicle?
2. Why all heavy vehicles have
diesel engine?
3. Why diesel cars are so noisy?
4. Why all sports vehicle and
bikes have petrol engine?
But when you go for purchase
a car, this information about both engine is not sufficient to differentiate
them. So today I am sharing the main difference between diesel and petrol
engine. Before reading this difference you should aware about what is engine and what is diesel engine and petrol engine. If you don't know more about them than first read the article given below and after read this post.
Difference Between Petrol Engine and Diesel Engine:
Diesel Engine or CI Engine
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Petrol Engine or SI Engine
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1.
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The diesel engine work on diesel cycle.
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The petrol engine works on Otto engine.
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2.
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In this engine Diesel is used as fuel which is a non-volatile
fuel.
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In this engine petrol which is a high volatile fuel is used
as fuel.
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3.
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In the diesel engine the air is sucked during the suction
stroke and the fuel is injected into combustion chamber thru injector.
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In the petrol engine the air-fuel mixture sucked during the
suction stroke.
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4.
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The ignition is due to the heat generated during the
compression stroke by the high compressed ratio. So it is called compression
ignition (CI) engine.
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The spark is generated by the spark plug into
the combustion chamber so the ignition is due to the spark by external source
so it is called spark ignition (SI) engine.
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5.
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Due to high compression ratio it have large vibration so it
develop more noise.
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Due to less compression ratio it has small vibration so it
develop less noise.
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6.
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To handle the high compression ratio it has heavy metal so
it is heavier than petrol engine.
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It has low compression ratio so they are light
in weight.
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7.
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This engine used injector to inject the fuel in
combustion chamber.
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This engine used spark plug to ignite the fuel in the
combustion chamber.
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8.
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Due to heavy weight and also due to heterogeneous combustion,
they are low speed engines.
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Due to light weight
and also due to homogeneous combustion, they are high speed engines.
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9.
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Due to heterogeneous combustion and high compression ratio,
it provides high torque. So it is used in heavy vehicle.
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Due to homogeneous combustion and comparatively low
compression ratio, it provides low torque. So it is used in light vehicle.
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10.
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In diesel engine there is no pre mixing of air and fuel so
no need of carburetor.
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In the petrol engine air fuel mixture is drawn
into the combustion chamber so due to pre mixing of air fuel carburetor is
required.
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11.
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Due to high compression ratio the diesel engine
generate high torque which is driving force of vehicle. So high torque is
required for heavy vehicle so this engine is used in heavy vehicle.
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Due to low compressed ratio it is not used in heavy
vehicle.
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12.
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Diesel is low volatile so it burns slowly. Due to slow burn
it generates low speed so it is not used in sports car.
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Petrol is high volatile so it burns rapidly. Due to rapid
burning it generates high speed so it is used in sports car.
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13.
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This engine develops low speed at high torque.
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This engine develops high speed at low torque.
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14.
.
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Due to heavy metal and injector, it is have high prices
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Due to light metal it has low prices.
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Today we have discussed Difference Between Petrol Engine and Diesel Engine. If you have any query, ask by commenting below.