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Automobile
Exhaust System |
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An automobile exhaust
system comprises of various devices or parts of an automotive
engine, which are used for discharging burned gases or steam.
Exhaust systems consists of tubing, which are usually used for
emitting out waste exhaust gases with the help of a controlled
combustion taking place inside an automobile engine. All the burnt
gases are exhaled from an engine using one or more exhaust pipes.
These gases are expelled out through several devices like cylinder
head, exhaust manifold, turbocharger, catalytic converter, muffler
and silencer.
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Following diagram illustrated
below explains the working of all the key components of an exhaust
system used in automobile. The major components used in a typical
automobile exhaust system are exhaust manifold, resonator, catalytic
converter, exhaust pipe, muffler, tail pipe, Y pipe,
ball flanges. All of these components are especially designed for
providing suitable and effective exhaust flow, silencing, and
emission levels.
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Components
of Automobile Exhaust System 
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Exhaust Pipes are explicitly
engineered to carry or transmit various toxic and noxious gases away
from the users of the machine. Usually, exhaust gases are very hot,
that is why exhaust pipes must be durable and heat resistant so that
it does not get spoiled by heat. These double walled pipes are
manufactured using different types of metals namely aluminized
steel, stainless steel or zinc plated heavy-gauge steel. The exhaust
pipes joins exhaust manifold, muffler and catalytic converters
together.
Different categories of exhaust
pipes include:
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Catalytic Converters are the
devices used for converting toxic and harmful hydrocarbons, carbon
monoxide, and nitrogen oxides into harmless compounds. Converters
transform hydrocarbons and carbon monoxide into carbon dioxide and
water while separate nitrogen oxide into nitrogen and oxygen
respectively. Catalytic converter is positioned underneath the
passenger seat in most of the vehicles. Apart from automobiles,
catalytic converters are widely used in manufacturing mining device,
trucks, buses, trains, generator sets, forklifts and other different
types of engine equipped machine. The converter make use of various
catalysts like platinum, palladium, and rhodium coated on a ceramic
honeycomb structure which turns the dangerous gases into non toxic
gases.
Catalytic Converters can be
broadly categorized on the basis of chemical reactions taking place
inside the engine as:
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Two-way
catalytic converter In this type of converter, process of
oxidation of carbon monoxide and hydrocarbons takes place
simultaneously.
Three-way catalytic
converter Under this a three way process i.e. reduction of
nitrogen oxides, oxidation of unburnt carcinogenic hydrocarbons
and oxidation of hydrocarbons takes place inside the engine.
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Exhaust clamps are the
components used for providing a strong connection between various
pipe sections and other engine components. Mostly, steel is used for
manufacturing exhaust clamps. It comes in wide array of sizes and
can accommodate different sizes of exhaust pipes and connections.
Exhaust brackets are a type of fastener generally made of steel and
is used for providing support to different components used in an
automobile exhaust system.
Various types of exhaust clamps
and brackets are:
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Heat Protection
Products includes wide variety of products like heat shields, heat
sleeving, heat tape which are used for protecting and guarding
various exhaust system components against the unwanted external heat
source.
Other types of heat protection
products used in automobiles include:
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