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ENGINE
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3.1.8.1.2 COMPONENTS
1. CLOSE COUPLED CATALYTIC CONVERTER
The Close Coupled Catalytic Converter is a
critical element of the system used to reduce vehicle
exhaust emissions. The catalytically active element
within the converter lowers the activation energy
needed to selectively transform harmful combustion
products into less harmful gases. The catalyst be-
comes active when it reaches a threshold
temperature.
Close coupled Catalytic Converter is
physically positioned very close to the engine ex-
haust ports to enable quicker light-off. It also enables
flushing out of the carbon particles present in the
Catalytic Converter.
BENEFITS
•
Positioned close to the engine exhaust ports for
fast light-off and reduced cold start emissions
•
Robust construction offers excellent durability.
•
Internally insulated construction design enables
improved durability, reduced heat rejection and
lower noise.
2. SILENCER
The function of silencer is to reduce exhaust
noise. The silencers are divided into three main
groups.
i) Main silencer
ii) Post silencer
The main function of the silencer is to reduce
the amount of noise emitted by the engine exhaust
gases flow. It typically makes use of the change in
the cross sectional area, which can be made as a
chamber to filter or reduce the sound waves which
the engine produces.
The silencer is typically installed along the
exhaust pipe as part of the exhaust system of the
engine. It has a resonating chamber, which is specif-
ically designed such that opposite sound waves
collide to cancel each other out.
3. EXHAUST MANIFOLD
The exhaust manifold has a precisely ma-
chined hole through which the exhaust gases are
tapped out.