IC ENGINE EXHAUST
Prakash chand kumawat
B.E. Final yr.
College of technology and engineering, Udaipur.
Exhaust gas or flue gases is emitted as a result of the
combustion of fuels such as petrol, diesel or fuel oil
A car's exhaust system is
responsible for transporting the burned exhaust, or
combustion gases, from its engine and out through the
Importance of exhaust system
The exhaust system has three major functions: 1. To
channel out the waste products of combustion out of
2. To reduce the noise generated by the engine.
3. To clean up the emissions that are harmful to the
Pollutants from Exhaust
CO — carbon monoxide.
CO2 — carbon dioxide.
NOx — nitrogen oxide
HC — hydrocarbons.
Other pollutants such as C6H6 — Benzene and its
derivatives and SO2 — sulphur dioxide are also present.
Components of Exhaust System:
1. Exhaust Manifold
3. Catalytic converter
4. The Tail Pipe
Hot exhaust gas along with sound waves generated at
the end of exhaust stroke is sent to the exhaust
manifold through the exhaust valve. which is extremely
hot, further burns any fuel that was inadequately
burned by the engine . Sound waves and exhaust gas
pass from exhaust manifold to catalytic converter
through a pipe.
A catalytic converter is a device that uses a catalyst to
convert harmful compounds in exhaust into harmless
compounds. Inside the catalytic converter there
consists two ceremics blocks with micro ducts
consisting of platnium and rohadium in one block
while platinium and pladium in other block, act as
The exhaust gas now becomes
less toxic but consists of sound
waves generated by the
engine. To cancel the noise of
these sound waves, the gas is
made to flow through the
muffler . Muffler consists of
chambers of different sizes.
The exhaust pipes, which can be metal or aluminium,
are responsible for transporting the burned exhaust
gases from the engine and the exhaust manifold and
funnelling them towards the car's tailpipe.